UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 10-K
(Mark One)
ýANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal period ended December 31, 20172018 or
¨TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from________to________
Commission
file number
 Registrant, State of Incorporation or Organization, Address of Principal Executive Offices and Telephone Number 
IRS Employer
Identification No.
  
dukeenergylogo4ca46.jpg
  
1-32853 
DUKE ENERGY CORPORATION
(a Delaware corporation)
550 South Tryon Street
Charlotte, NC 28202-1803
704-382-3853
 20-2777218
Commission file number Registrant, State of Incorporation or Organization, Address of Principal Executive Offices, Telephone Number and IRS Employer Identification Number Commission file number Registrant, State of Incorporation or Organization, Address of Principal Executive Offices, Telephone Number and IRS Employer Identification Number
1-4928 
DUKE ENERGY CAROLINAS, LLC
(a North Carolina limited liability company)
526 South Church Street
Charlotte, North Carolina 28202-1803
704-382-3853
56-0205520
 1-3274 
DUKE ENERGY FLORIDA, LLC
(a Florida limited liability company)
299 First Avenue North
St. Petersburg, Florida 33701
704-382-3853
59-0247770
1-15929 
PROGRESS ENERGY, INC.
(a North Carolina corporation)
410 South Wilmington Street
Raleigh, North Carolina 27601-1748
704-382-3853
56-2155481
 1-1232 
DUKE ENERGY OHIO, INC.
(an Ohio corporation)
139 East Fourth Street
Cincinnati, Ohio 45202
704-382-3853
31-0240030
1-3382 
DUKE ENERGY PROGRESS, LLC
(a North Carolina limited liability company)
410 South Wilmington Street
Raleigh, North Carolina 27601-1748
704-382-3853
56-0165465
 1-3543 
DUKE ENERGY INDIANA, LLC
(an Indiana limited liability company)
1000 East Main Street
Plainfield, Indiana 46168
704-382-3853
35-0594457
1-6196 
PIEDMONT NATURAL GAS COMPANY, INC.
(a North Carolina corporation)
4720 Piedmont Row Drive
Charlotte, North Carolina 28210
704-364-3120
56-0556998
    
SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:
Registrant Title of each class 
Name of each exchange on
which registered
Duke Energy Corporation
(Duke Energy)
 Common Stock, $0.001 par value New York Stock Exchange Inc.LLC
Duke Energy 5.125% Junior Subordinated Debentures due January 15, 2073 New York Stock Exchange Inc.LLC
Duke Energy5.625% Junior Subordinated Debentures due September 15, 2078New York Stock Exchange LLC

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:  None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities ActAct.
Duke Energy
Yes x
 
No ¨
 Duke Energy Florida, LLC (Duke Energy Florida)
Yes x
 
No ¨
Duke Energy Carolinas, LLC (Duke Energy Carolinas)
Yes x
 
No ¨
 Duke Energy Ohio, Inc. (Duke Energy Ohio)
Yes x
 
No ¨
Progress Energy, Inc. (Progress Energy)
Yes ¨
 
No x
 Duke Energy Indiana, LLC (Duke Energy Indiana)
Yes x¨
 
No ¨x
Duke Energy Progress, LLC (Duke Energy Progress)
Yes x
 
No ¨
 Piedmont Natural Gas Company, Inc. (Piedmont)
Yes x¨
 
No ¨x
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.
Yes ¨ No x (Response applicable to all registrants.)
Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨
Indicate by check mark whether the registrants have submitted electronically and posted on their corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨ (Only applicable to Duke Energy)
Indicate by check mark whether Duke Energy is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer” andfiler,” “smaller reporting company”company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one): Large accelerated filer x Accelerated filer ¨ Non-accelerated filer ¨ Smaller reporting company ¨ Emerging growth company ¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether each of Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont areis a large accelerated filers,filer, accelerated filers,filer, non-accelerated filers, orfiler, smaller reporting companies.company, or emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer” andfiler,” “smaller reporting company”company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one): Large accelerated filer ¨ Accelerated filer ¨ Non-accelerated filer x Smaller reporting company ¨ Emerging growth company ¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether each of the registrants areis a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x
Estimated aggregate market value of the common equity held by nonaffiliates of Duke Energy at June 30, 2017.$58,468,482,557
Number of shares of Common Stock, $0.001 par value, outstanding at January 31, 2018.700,092,667
Estimated aggregate market value of the common equity held by nonaffiliates of Duke Energy at June 30, 2018.$56,283,598,357
Number of shares of Common Stock, $0.001 par value, outstanding at January 31, 2019.727,010,882
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Duke Energy definitive proxy statement for the 20182019 Annual Meeting of the Shareholders or an amendment to this Annual Report are incorporated by reference into PART III, Items 10, 11 and 13 hereof.
This combined Form 10-K is filed separately by eight registrants: Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont (collectively the Duke Energy Registrants). Information contained herein relating to any individual registrant is filed by such registrant solely on its own behalf. Each registrant makes no representation as to information relating exclusively to the other registrants.
Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont meet the conditions set forth in General Instructions I(1)(a) and (b) of Form 10-K and are, therefore, filing this Form 10-K with the reduced disclosure format specified in General Instructions I(2) of Form 10-K. 





TABLE OF CONTENTS


TABLE OF CONTENTS
FORM 10-K FOR THE YEAR ENDED December 31, 20172018
Item
 Page Page
    
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATIONCAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION 
    
GLOSSARY OF TERMSGLOSSARY OF TERMS GLOSSARY OF TERMS 
    
PART I.    
1.
PIEDMONTPIEDMONT
    
1A.
  
1B.
  
2.
  
3.
  
4.
    
PART II.    
5.
    
6.
    
7.
    
7A.
    
8.
    
9.
    
9A.
    
PART III.    
10.
    
11.
    
12.
    
13.
    
14.
    
PART IV.    
15.
EXHIBIT INDEXEXHIBIT INDEX





FORWARD LOOKING STATEMENTS


CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
This document includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are based on management’s beliefs and assumptions and can often be identified by terms and phrases that include “anticipate,” “believe,” “intend,” “estimate,” “expect,” “continue,” “should,” “could,” “may,” “plan,” “project,” “predict,” “will,” “potential,” “forecast,” “target,” “guidance,” “outlook” or other similar terminology. Various factors may cause actual results to be materially different than the suggested outcomes within forward-looking statements; accordingly, there is no assurance that such results will be realized. These factors include, but are not limited to:
State, federal and foreign legislative and regulatory initiatives, including costs of compliance with existing and future environmental requirements, including those related to climate change, as well as rulings that affect cost and investment recovery or have an impact on rate structures or market prices;
The extent and timing of costs and liabilities to comply with federal and state laws, regulations and legal requirements related to coal ash remediation, including amounts for required closure of certain ash impoundments, are uncertain and difficult to estimate;
The ability to recover eligible costs, including amounts associated with coal ash impoundment retirement obligations and costs related to significant weather events, and to earn an adequate return on investment through rate case proceedings and the regulatory process;
The costs of decommissioning Crystal River Unit 3 and other nuclear facilities could prove to be more extensive than amounts estimated and all costs may not be fully recoverable through the regulatory process;
Costs and effects of legal and administrative proceedings, settlements, investigations and claims;
Industrial, commercial and residential growth or decline in service territories or customer bases resulting from sustained downturns of the economy and the economic health of our service territories or variations in customer usage patterns, including energy efficiency efforts and use of alternative energy sources, such as self-generation and distributed generation technologies;
Federal and state regulations, laws and other efforts designed to promote and expand the use of energy efficiency measures and distributed generation technologies, such as private solar and battery storage, in Duke Energy service territories could result in customers leaving the electric distribution system, excess generation resources as well as stranded costs;
Advancements in technology;
Additional competition in electric and natural gas markets and continued industry consolidation;
The influence of weather and other natural phenomena on operations, including the economic, operational and other effects of severe storms, hurricanes, droughts, earthquakes and tornadoes, including extreme weather associated with climate change;
The ability to successfully operate electric generating facilities and deliver electricity to customers including direct or indirect effects to the company resulting from an incident that affects the U.S. electric grid or generating resources;
The ability to complete necessary or desirable pipeline expansion or infrastructure projects in our natural gas business;
Operational interruptions to our natural gas distribution and transmission activities;
The availability of adequate interstate pipeline transportation capacity and natural gas supply;
The impact on facilities and business from a terrorist attack, cybersecurity threats, data security breaches and other catastrophic events, such as fires, explosions, pandemic health events or other similar occurrences;
The inherent risks associated with the operation of nuclear facilities, including environmental, health, safety, regulatory and financial risks, including the financial stability of third-party service providers;
The timing and extent of changes in commodity prices and interest rates and the ability to recover such costs through the regulatory process, where appropriate, and their impact on liquidity positions and the value of underlying assets;
The results of financing efforts, including the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings, interest rate fluctuations, compliance with debt covenants and conditions and general market and economic conditions;
Credit ratings of the Duke Energy Registrants may be different from what is expected;
Declines in the market prices of equity and fixed-income securities and resultant cash funding requirements for defined benefit pension plans, other post-retirement benefit plans and nuclear decommissioning trust funds;
Construction and development risks associated with the completion of the Duke Energy Registrants’ capital investment projects, including risks related to financing, obtaining and complying with terms of permits, meeting construction budgets and schedules and satisfying operating and environmental performance standards, as well as the ability to recover costs from customers in a timely manner, or at all;
Changes in rules for regional transmission organizations, including changes in rate designs and new and evolving capacity markets, and risks related to obligations created by the default of other participants;
The ability to control operation and maintenance costs;
The level of creditworthiness of counterparties to transactions;
State, federal and foreign legislative and regulatory initiatives, including costs of compliance with existing and future environmental requirements, including those related to climate change, as well as rulings that affect cost and investment recovery or have an impact on rate structures or market prices;
The extent and timing of costs and liabilities to comply with federal and state laws, regulations and legal requirements related to coal ash remediation, including amounts for required closure of certain ash impoundments, are uncertain and difficult to estimate;
The ability to recover eligible costs, including amounts associated with coal ash impoundment retirement obligations and costs related to significant weather events, and to earn an adequate return on investment through rate case proceedings and the regulatory process;
The costs of decommissioning Crystal River Unit 3 and other nuclear facilities could prove to be more extensive than amounts estimated and all costs may not be fully recoverable through the regulatory process;
Costs and effects of legal and administrative proceedings, settlements, investigations and claims;
Industrial, commercial and residential growth or decline in service territories or customer bases resulting from sustained downturns of the economy and the economic health of our service territories or variations in customer usage patterns, including energy efficiency efforts and use of alternative energy sources, such as self-generation and distributed generation technologies;
Federal and state regulations, laws and other efforts designed to promote and expand the use of energy efficiency measures and distributed generation technologies, such as private solar and battery storage, in Duke Energy service territories could result in customers leaving the electric distribution system, excess generation resources as well as stranded costs;
Advancements in technology;
Additional competition in electric and natural gas markets and continued industry consolidation;
The influence of weather and other natural phenomena on operations, including the economic, operational and other effects of severe storms, hurricanes, droughts, earthquakes and tornadoes, including extreme weather associated with climate change;
The ability to successfully operate electric generating facilities and deliver electricity to customers including direct or indirect effects to the company resulting from an incident that affects the U.S. electric grid or generating resources;
The ability to obtain the necessary permits and approvals and to complete necessary or desirable pipeline expansion or infrastructure projects in our natural gas business;
Operational interruptions to our natural gas distribution and transmission activities;
The availability of adequate interstate pipeline transportation capacity and natural gas supply;
The impact on facilities and business from a terrorist attack, cybersecurity threats, data security breaches, operational accidents, information technology failures or other catastrophic events, such as fires, explosions, pandemic health events or other similar occurrences;
The inherent risks associated with the operation of nuclear facilities, including environmental, health, safety, regulatory and financial risks, including the financial stability of third-party service providers;
The timing and extent of changes in commodity prices and interest rates and the ability to recover such costs through the regulatory process, where appropriate, and their impact on liquidity positions and the value of underlying assets;
The results of financing efforts, including the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings, interest rate fluctuations, compliance with debt covenants and conditions and general market and economic conditions;
Credit ratings of the Duke Energy Registrants may be different from what is expected;
Declines in the market prices of equity and fixed-income securities and resultant cash funding requirements for defined benefit pension plans, other post-retirement benefit plans and nuclear decommissioning trust funds;
Construction and development risks associated with the completion of the Duke Energy Registrants’ capital investment projects, including risks related to financing, obtaining and complying with terms of permits, meeting construction budgets and schedules and satisfying operating and environmental performance standards, as well as the ability to recover costs from customers in a timely manner, or at all;
Changes in rules for regional transmission organizations, including changes in rate designs and new and evolving capacity markets, and risks related to obligations created by the default of other participants;
The ability to control operation and maintenance costs;
The level of creditworthiness of counterparties to transactions;
Employee workforce factors, including the potential inability to attract and retain key personnel;





The ability of subsidiaries to pay dividends or distributions to Duke Energy Corporation holding company (the Parent);
The performance of projects undertaken by our nonregulated businesses and the success of efforts to invest in and develop new opportunities;
FORWARD LOOKING STATEMENTS
The effect of accounting pronouncements issued periodically by accounting standard-setting bodies;
The impact of new U.S. tax legislation to our financial condition, results of operations or cash flows and our credit ratings;
The impacts from potential impairments of goodwill or equity method investment carrying values;
The ability to successfully complete future merger, acquisition or divestiture plans; and
The ability to implement our business strategy.
The ability of subsidiaries to pay dividends or distributions to Duke Energy Corporation holding company (the Parent);
The performance of projects undertaken by our nonregulated businesses and the success of efforts to invest in and develop new opportunities;
The effect of accounting pronouncements issued periodically by accounting standard-setting bodies;
The impact of U.S. tax legislation to our financial condition, results of operations or cash flows and our credit ratings;
The impacts from potential impairments of goodwill or equity method investment carrying values; and
The ability to implement our business strategy, including enhancing existing technology systems.
Additional risks and uncertainties are identified and discussed in the Duke Energy Registrants' reports filed with the SEC and available at the SEC's website at www.sec.gov.sec.gov. In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements might not occur or might occur to a different extent or at a different time than described. Forward-looking statements speak only as of the date they are made and the Duke Energy Registrants expressly disclaim an obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.





GLOSSARY OF TERMS


Glossary of Terms 
The following terms or acronyms used in this Form 10-K are defined below:
Term or AcronymDefinition
  
2013 SettlementRevised and Restated Stipulation and Settlement Agreement approved in November 2013 among Duke Energy Florida, the Florida OPC and other customer advocates
  
the 2015 PlanDuke Energy Corporation 2015 Long-Term Incentive Plan
  
2017 SettlementSecond Revised and Restated Settlement Agreement in 2017 among Duke Energy Florida, the Florida OPC and other customer advocates, which replaces and supplants the 2013 Settlement
  
ACEAffordable Clean Energy
ACPAtlantic Coast Pipeline, LLC, a limited liability company owned by Dominion, Duke Energy and Southern Company Gas
  
ACP PipelinepipelineThe approximately 600-mile proposed interstate natural gas pipeline
ADITNet Accumulated Deferred Income Tax
  
AFUDCAllowance for funds used during construction
  
AFSAvailable for Sale
the AgentsWells Fargo Securities, LLC, Citigroup Global Market Inc.,J.P. Morgan Securities, LLC
  
ALJAdministrative Law Judge
  
Amended ComplaintAmended Verified Consolidated Shareholder Derivative Complaint
AMIAdvanced Metering Infrastructure
  
ANPRMAMTAdvance Notice of Proposed RulemakingAlternative Minimum Tax
  
AOCIAccumulated Other Comprehensive Income (Loss)
  
AROAsset Retirement Obligation
  
the ASRAccelerated Stock Repurchase Program
  
ASRPATMAccelerated natural gas service line replacement programAt-the-market
  
Audit CommitteeAudit Committee of the Board of Directors
  
BarclaysBarclays Capital Inc.
  
BCWFBenton County Wind Farm, LLC
  
BeckjordBeckjord Generating Station
  
Belews CreekBelews Creek Steam Station
  
BisonBison Insurance Company Limited
  
Board of DirectorsDuke Energy Board of Directors
Bresalier ComplaintShareholder derivative lawsuit filed by Saul Bresalier related to ash basin management practices
Bresalier DefendantsSeveral current and former Duke Energy officers and directors named in the Bresalier Complaint
Bridge Facility$4.9 billion senior secured financing facility with Barclays Capital Inc.
  
BrunswickBrunswick Nuclear Plant
  
CAAClean Air Act
  
CardinalCardinal Pipeline Company, LLC
  
CatawbaCatawba Nuclear Station
  
CCCombined Cycle
  
CCRCoal Combustion Residuals
  
CCSCarbon Capture and Storage
  
CECPCNCertificate of Environmental Compatibility and Public Convenience and Necessity
  
CEOChief Executive Officer
  
CertainTeedCertainTeed Gypsum NC, Inc.
  
CinergyCinergy Corp. (collectively with its subsidiaries)
  
Citrus County CCCitrus County Combined Cycle Facility
CO2
Carbon Dioxide


  
Coal Ash ActNorth Carolina Coal Ash Management Act of 2014
  
COLCombined Operating License
  
the CompanyDuke Energy Corporation and its subsidiaries




GLOSSARY OF TERMS 


Consolidated Complaint
Corrected Verified Consolidated Shareholder Derivative Complaint
  
ConstitutionConstitution Pipeline Company, LLC
  
COSOCommittee of Sponsoring Organizations of the Treadway Commission
CPCapacity Performance
  
CPCNCertificate of Public Convenience and Necessity
  
CPPClean Power Plan
  
CRCCinergy Receivables Company LLC
  
Crystal River Unit 3Crystal River Unit 3 Nuclear Plant
  
CSAComprehensive Site Assessment
  
CSAPRCross-State Air Pollution Rule
  
CTCombustion Turbine
  
CTGChina Three Gorges (Luxembourg) Energy S.à.r.l.
  
CWAClean Water Act
  
DATCDuke-American Transmission Co.
  
D.C. Circuit CourtU.S. Court of Appeals for the District of Columbia
  
the DealersDCIGoldman, Sachs & Co. and JPMorgan Chase BankDistribution Capital Investment
  
DEFPFDuke Energy Florida Project Finance, LLC
  
DEFRDuke Energy Florida Receivables, LLC
  
DeloitteDeloitte & Touche LLP, and the member firms of Deloitte Touche Tohmatsu and their respective affiliates
  
DEPRDuke Energy Progress Receivables, LLC
  
DERFDuke Energy Receivables Finance Company, LLC
  
DHHSNorth Carolina Department of Health and Human Services
  
Directors' Savings PlanDuke Energy Corporation Directors' Savings Plan
  
DOEU.S. Department of Energy
  
DOJDepartment of Justice
  
DominionDominion Resources
  
DRIPDividend Reinvestment Program
  
DSMDemand Side Management
  
DthDekatherm
Duke EnergyDuke Energy Corporation (collectively with its subsidiaries)
  
Duke Energy CarolinasDuke Energy Carolinas, LLC
Duke Energy DefendantsSeveral current and former Duke Energy officers and directors named as defendants in the Consolidated Complaint
  
Duke Energy FloridaDuke Energy Florida, LLC
  
Duke Energy IndianaDuke Energy Indiana, LLC
  
Duke Energy KentuckyDuke Energy Kentucky, Inc.
  
Duke Energy OhioDuke Energy Ohio, Inc.
  
Duke Energy ProgressDuke Energy Progress, LLC
  


Duke Energy RegistrantsDuke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont
DynegyDynegy Inc.
  
East BendEast Bend Generating Station
  
the EDAEquity Distribution Agreement
  
EEEnergy efficiency
  
EGUElectric Generating Units
EISEnvironmental Impact Statement
  
ELGEffluent Limitations Guidelines
  
EPAU.S. Environmental Protection Agency
  
EPCEngineering, Procurement and Construction agreement
  
EPSEarnings Per Share
  
ESPElectric Security Plan




GLOSSARY OF TERMS


  
ETREffective tax rate
  
Exchange ActSecurities Exchange Act of 1934
Executive Savings PlanDuke Energy Corporation Executive Savings Plan
  
FASBFinancial Accounting Standards Board
  
FERCFederal Energy Regulatory Commission
FESFirstEnergy Solutions Corp.
  
FitchFitch Ratings, Inc.
  
FirstEnergyFirstEnergy Corp.
  
Florida OPCFlorida Office of Public Counsel
  
Form S-3Registration statement
  
FP&LFlorida Power & Light Company
  
FPSCFlorida Public Service Commission
  
FRRFTRFixed Resource RequirementFinancial transmission rights
  
FTRFluorFinancial transmission rightsFluor Enterprises, Inc.
FV-NIFair value through net income
  
GAAPGenerally Accepted Accounting Principles in the United States
GAAP Reported EarningsNet Income Attributable to Duke Energy Corporation
GAAP Reported EPSDiluted EPS Attributable to Duke Energy Corporation common stockholders
  
GHGGreenhouse Gas
  
GWhGigawatt-hours
  
Hardy StorageHardy Storage Company, LLC
  
HarrisShearon Harris Nuclear Plant
  
HinesHines Energy Complex
  
I SquaredISQ Enerlam Aggregator, L.P. and Enerlam (UK) Holding Ltd.
  
IBNRIncurred but not yet reported
  
ICPAInter-Company Power Agreement
  
IGCCIntegrated Gasification Combined Cycle
IGCC RiderTracking mechanism used to recover costs related to the Edwardsport IGCC plant from retail electric customers
IGCC Settlement2015 Settlement to resolve disputes with intervenors related to five IGCC riders
  
IMRIntegrity Management Rider
  
International Disposal GroupDuke Energy's international business, excluding National Methanol Company
  
IRPIntegrated Resource Plans
  
IRSInternal Revenue Service
  


ISFSIIndependent Spent Fuel Storage Installation
  
ISOIndependent System Operator
  
ITCInvestment Tax Credit
  
IURCIndiana Utility Regulatory Commission
  
Investment TrustsGrantor trusts of Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana
  
JDAJoint Dispatch Agreement
  
KO TransmissionKO Transmission Company
  
KPSCKentucky Public Service Commission
  
kVKilovolt
  
kWhKilowatt-hour
LDCLocal Distribution Company
  
Lee Nuclear StationWilliam States Lee III Nuclear Station
  
Legacy Duke Energy DirectorsMembers of the pre-merger Duke Energy Board of Directors
LevyDuke Energy Florida’s proposed nuclear plant in Levy County, Florida
  




GLOSSARY OF TERMS


LIBORLondon Interbank Offered Rate
  
Long-Term FERC MitigationLLCThe revised market power mitigation plan related to the Progress Energy mergerLimited Liability Company
  
Master TrustDuke Energy Corporation Master Retirement Trust
  
McGuireMcGuire Nuclear Station
  
Merger AgreementThe Agreement and Plan of Merger between Duke Energy and Piedmont
Merger Chancery LitigationFour shareholder derivative lawsuits filed in the Delaware Chancery Court related to the Progress Energy merger
  
MGPManufactured gas plant
  
Midwest Generation Disposal GroupDuke Energy Ohio’s nonregulated Midwest generation business and Duke Energy Retail Sales, LLC
  
MISOMidcontinent Independent System Operator, Inc.
  
MMBtuMillion British Thermal Unit
  
MPPMoney Purchase Pension
  
Moody’sMoody’s Investors Service, Inc.
  
MTBEMethyl tertiary butyl ether
  
MTEPMISO Transmission Expansion Planning
  
MWMegawatt
  
MVPMulti Value Projects
  
MWhMegawatt-hour
  
NAAQSNational Ambient Air Quality Standards
NAVNet asset value
NAWNorth Allegheny Wind, LLC
NCDEQNorth Carolina Department of Environmental Quality (formerly the North Carolina Department of Environment and Natural Resources)
  
NCEMCNorth Carolina Electric Membership Corporation
  
NCEMPANorth Carolina Eastern Municipal Power Agency
NCRCFlorida’s Nuclear Cost Recovery Clause
  
NCRSNuclear Power Plant Cost Recovery Statutes
  
NCUCNorth Carolina Utilities Commission
  
NDTFNuclear decommissioning trust funds
  
NEILNuclear Electric Insurance Limited
  


New Source ReviewNew Source Review (NSR) is a CAA program that requires industrial facilities to install modern pollution control equipment when they are built or when making a change that increases emissions significantly
  
NYSDECNew York State Department of Environmental Conservation
  
NMCNational Methanol Company
  
NOLNet operating loss
  
NOVNotice of violation
  
NOx
Nitrogen oxide
  
NPDESNational Pollutant Discharge Elimination System
  
NPNSNormal purchase/normal sale
  
NPRNPRMNotice of Proposed Rulemaking
  
NRCU.S. Nuclear Regulatory Commission
  
NSRNew Source Review
NWPANuclear Waste Policy Act of 1982 (as amended)
  
NYSENew York Stock Exchange
  
OconeeOconee Nuclear Station
  
OMBOffice of Management and Budget




GLOSSARY OF TERMS


OPEBOther Post-Retirement Benefit Obligations
  
ORSOffice of Regulatory Staff
  
Osprey Plant acquisitionDuke Energy Florida's purchase of a Calpine Corporation's 599-MW combined-cycle natural gas plant in Auburndale, Florida
  
OTTIOther-than-temporary impairment
  
OVECOhio Valley Electric Corporation
  
the ParentDuke Energy Corporation holding company
  
PCAOBPublic Company Accounting Oversight Board
  
PGAPurchased Gas Adjustments
  
Phase I CCR Compliance ProjectsDuke Energy Indiana's federally mandated compliance projects to comply with the EPA's CCR rule
Philadelphia Utility IndexPhiladelphia Sector Index
  
PHMSAPipeline and Hazardous Materials Safety Administration
  
PiedmontPiedmont Natural Gas Company, Inc.
  
Piedmont Pension AssetsQualified pension plan assets associated with the Retirement Plan of Piedmont
  
Piedmont Term Loan18-month termTerm loan facility with commitments totaling $250M$350M entered in June 2017
  
Pine NeedlePine Needle LNG Company, LLC
  
PioneerPioneer Transmission, LLC
  
PJMPJM Interconnection, LLC
  
PMPAPiedmont Municipal Power Agency
  
PPAPurchase Power Agreement
  
Progress EnergyProgress Energy, Inc.
  
PSCSCPublic Service Commission of South Carolina
  
PTCProduction Tax Credits
  
PUCOPublic Utilities Commission of Ohio
  
PUCO OrderOrder issued by PUCO approving a settlement of Duke Energy Ohio’s natural gas base rate case and authorizing the recovery of certain MGP costs
  
PURPAPublic Utility Regulatory Policies Act of 1978
  
QFQualifying Facility
  


RCARevolving Credit Agreement
RCRAResource Conservation and Recovery Act
RECRenewable Energy Certificate
REC SolarREC Solar Corp.
  
Relative TSRTSR of Duke Energy stock relative to a predefined peer group
  
RobinsonRobinson Nuclear Plant
  
RRBARoanoke River Basin Association
  
RSURestricted Stock Unit
  
RTORegional Transmission Organization
  
SABStaff Accounting Bulletin
Sabal TrailSabal Trail Transmission, LLC
  
Sabal Trail PipelinepipelineSabal Trail Natural Gas Pipeline
SACESouthern Alliance of Clean Energy
  
SAFSTORA method of decommissioning in which a nuclear facility is placed and maintained in a condition that allows the facility to be safely stored and subsequently decontaminated to levels that permit release for unrestricted use
S.C. Court of AppealsCourt of Appeals of South Carolina
SCCLSouth Carolina Coastal Conservation League
  
SECSecurities and Exchange Commission
  
SEISSupplemental Environmental Impact Statement
  
SELCSouthern Environmental Law Center
  
Segment IncomeIncome from continuing operations net of income attributable to noncontrolling interests
  




GLOSSARY OF TERMS


SO2
Sulfur dioxide
  
SouthStarSouthStar Energy Services, LLC
  
Spectra CapitalSpectra Energy Capital, LLC
  
S&PStandard & Poor’s Rating Services
  
S&P 500Standard & Poor's 500 Stock Index
  
SSOStandard Service Offer
  
State Utility Commissionsutility commissionsNCUC, PSCSC, FPSC, PUCO, IURC, KPSC and TPUC (Collectively)
  
State Electric Utility Commissionselectric utility commissionsNCUC, PSCSC, FPSC, PUCO, IURC and KPSC (Collectively)
  
State Gas Utility Commissionsgas utility commissionsNCUC, PSCSC, PUCO, TPUC and KPSC (Collectively)
  
Subsidiary RegistrantsDuke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont
  
SuttonL.V. Sutton Combined Cycle Plant
  
the Tax ActTax CutCuts and Jobs Act
  
T&D RiderTDSICTracking mechanism to recover grid infrastructure improvement costs in IndianaTransmission, Distribution and Storage System Improvement Charge
Three Year RevolverDuke Energy (Parent) $1.0 billion revolving credit facility
  
TPUCTennessee Public Utility Commission
  
TSRTSCATotal shareholder returnToxic Substances Control Act
  
Uprate ProjectTSRHines Chiller Uprate ProjectTotal shareholder return
  
U.S.United States
  
U.S. Court of AppealsU.S. Court of Appeals for the Second Circuit
  
VEBAVoluntary Employees' Beneficiary Association
  
VIEVariable Interest Entity
  
WACCWeighted Average Cost of Capital
  
WestinghouseWestinghouse Electric Company
WNAweatherWeather normalization adjustment
W.S. Lee CCWilliam States Lee Combined Cycle Facility
  
WVPAWabash Valley Power Association, Inc.



PART I

BUSINESS


 
ITEM 1. BUSINESS
 
DUKE ENERGY
 
General
Duke Energy Corporation (collectively with its subsidiaries, Duke Energy) was incorporated on May 3, 2005, and is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the Federal Energy Regulatory Commission (FERC).FERC and other regulatory agencies listed below. Duke Energy operates in the United States (U.S.)U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas, LLC (Duke Energy Carolinas); Progress Energy, Inc. (Progress Energy); Duke Energy Progress, LLC (Duke Energy Progress); Duke Energy Florida, LLC (Duke Energy Florida); Duke Energy Ohio, Inc. (Duke Energy Ohio); Duke Energy Indiana LLC (Duke Energy Indiana) and Piedmont Natural Gas Company, Inc. (Piedmont).Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate subsidiary registrants (collectively referred to as the Subsidiary Registrants),Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
Piedmont, a North Carolina corporation, is an energy services company whose principal business is the distribution of natural gas to over 1 million residential, commercial, industrial and power generation customers in portions of North Carolina, South Carolina and Tennessee, including customers served by municipalities who are Piedmont's sales for resale customers. In October 2016, Duke Energy completed the acquisition of Piedmont. Piedmont's earnings and cash flows are only included in Duke Energy's consolidated results subsequent to the acquisition date. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information regarding the acquisition.
In December 2016, Duke Energy completed an exit of the Latin American market to focus on its domestic regulated business, which was further bolstered by the acquisition of Piedmont. The sale of the International Energy business segment, excluding an equity method investment in National Methanol Company (NMC),NMC, was completed through two transactions including a sale of assets in Brazil to China Three Gorges (Luxembourg) Energy S.à.r.l. (CTG)CTG and a sale of Duke Energy's remaining Latin American assets in Peru, Chile, Ecuador, Guatemala, El Salvador and Argentina to ISQ Enerlam Aggregator, L.P. and Enerlam (UK) Holding Ltd. (I Squared)I Squared (collectively, the International Disposal Group). See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information on the sale of International Energy.
The Duke Energy Registrants electronically file reports with the Securities and Exchange Commission (SEC),SEC, including Annual Reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxiesproxy statements and amendments to such reports.
The public may read and copy any materials the Duke Energy Registrants file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC also maintains an internet site that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC at http://www.sec.gov.sec.gov. Additionally, information about the Duke Energy Registrants, including reports filed with the SEC, is available through Duke Energy’s website at http://www.duke-energy.com.duke-energy.com. Such reports are accessible at no charge and are made available as soon as reasonably practicable after such material is filed with or furnished to the SEC.
Business Segments
Duke Energy's segment structure includes three reportable operating segments (business segments);business segments: Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables. The remainder of Duke Energy’s operations is presented as Other. Duke Energy's chief operating decision-maker routinely reviews financial information about each of these business segments in deciding how to allocate resources and evaluate the performance of the business. For additional information on each of these business segments, including financial and geographic information, see Note 3 to the Consolidated Financial Statements, “Business Segments.” The following sections describe the business and operations of each of Duke Energy’s business segments, as well as Other.
ELECTRIC UTILITIES AND INFRASTRUCTURE
Electric Utilities and Infrastructure conducts operations primarily through the regulated public utilities of Duke Energy Carolinas, Duke Energy Progress, Duke Energy Florida, Duke Energy Indiana and Duke Energy Ohio. Electric Utilities and Infrastructure provides retail electric service through the generation, transmission, distribution and sale of electricity to approximately 7.67.7 million customers within the Southeast and Midwest regions of the U.S. The service territory is approximately 95,000 square miles across six states with a total estimated population of 24 million people. The operations include electricity sold wholesale to municipalities, electric cooperative utilities and other load-serving entities. Electric Utilities and Infrastructure is also a joint owner in certain electric transmission projects. Electric Utilities and Infrastructure has a 50 percent ownership interest in Duke-American Transmission Co. (DATC),DATC, a partnership with American Transmission Company, formed to design, build and operate transmission infrastructure. DATC owns 72 percent of the transmission service rights to Path 15, an 84-mile transmission line in central California. Electric Utilities and Infrastructure also has a 50 percent ownership interest in Pioneer Transmission, LLC, which builds, owns and operates electric transmission facilities in North America. The following map shows the service territory for Electric Utilities and Infrastructure as of December 31, 2018.



9

BUSINESS


PART I

euimap2018001.jpg
The electric operations and investments in projects are subject to the rules and regulations of the FERC, the North Carolina Utilities Commission (NCUC),NRC, the Public Service Commission of South Carolina (PSCSC),NCUC, the Florida Public Service Commission (FPSC),PSCSC, the Indiana Utility Regulatory Commission (IURC),FPSC, the Public Utilities Commission of Ohio (PUCO)IURC, the PUCO and the Kentucky Public Service Commission (KPSC).KPSC.
The following table represents the distribution of billed sales by customer class for the year ended December 31, 2017.2018.
Duke
 Duke
 Duke
 Duke
 Duke
Duke
 Duke
 Duke
 Duke
 Duke
Energy
 Energy
 Energy
 Energy
 Energy
Energy
 Energy
 Energy
 Energy
 Energy
Carolinas
 Progress
 Florida
 Ohio
 Indiana
Carolinas
 Progress
 Florida
 Ohio
 Indiana
Residential30% 26% 49% 34% 26%32% 27% 50% 37% 28%
General service33% 23% 37% 38% 25%32% 23% 37% 38% 25%
Industrial25% 16% 8% 23% 32%24% 15% 7% 23% 31%
Total retail sales88% 65% 94% 95% 83%88% 65% 94% 98% 84%
Wholesale and other sales12% 35% 6% 5% 17%12% 35% 6% 2% 16%
Total sales100% 100% 100% 100% 100%100% 100% 100% 100% 100%
The number of residential and general service customers within the Electric Utilities and Infrastructure service territory is expected to increase over time. While economic conditions within the service territory continue to improve,remain strong, sales growth has been hamperedcontinues to be influenced by continued adoption of energy efficiencies and self-generation. TheResidential sales for 2018 compared to 2017 saw relatively strong growth despite the impact from increasing amounts of energy efficiency. However, the continued adoption of more efficient housing and appliances is expected to have a negative impact on average usage per residential customer over time. While residential sales increased in 2017 compared to 2016, the growth rate was modest when compared to historical periods.
Seasonality and the Impact of Weather
Revenues and costs are influenced by seasonal weather patterns. Peak sales of electricity occur during the summer and winter months, which results in higher revenue and cash flows during these periods. By contrast, lower sales of electricity occur during the spring and fall, allowing for scheduled plant maintenance. Residential and general service customers are more impacted by weather than industrial customers. Estimated weather impacts are based on actual current period weather compared to normal weather conditions. Normal weather conditions are defined as the long-term average of actual historical weather conditions.



BUSINESS


The estimated impact of weather on earnings is based on the temperature variances from a normal condition and customers’ historic usage patterns. The methodology used to estimate the impact of weather does not consider all variables that may impact customer response to weather conditions such as humidity in the summer or wind chill in the winter. The precision of this estimate may also be impacted by applying long-term weather trends to shorter-term periods.
Heating-degree days measure the variation in weather based on the extent the average daily temperature falls below a base temperature. Cooling-degree days measure the variation in weather based on the extent the average daily temperature rises above the base temperature. Each degree of temperature below the base temperature counts as one heating-degree day and each degree of temperature above the base temperature counts as one cooling-degree day.
Competition
Retail
Electric Utilities and Infrastructure’s businesses operate as the sole supplier of electricity within their service territories, with the exception of Ohio, which has a competitive electricity supply market for generation service. Electric Utilities and Infrastructure owns and operates facilities necessary to transmit, and distribute electricity and except in Ohio, to generate electricity. Services are priced by state commission approved rates designed to include the costs of providing these services and a reasonable return on invested capital. This regulatory policy is intended to provide safe and reliable electricity at fair prices.
Competition in the regulated electric distribution business is primarily from the development and deployment of alternative energy sources including on-site generation from industrial customers and distributed generation, such as private solar, at residential, general service and/or industrial customer sites.
Duke Energy is not aware of any proposed legislation within any of its jurisdictions that would provide retail customers the right to choose their electricity provider or otherwise restructure or deregulate the electric industry, including broadly subsidizing distributed generation such as private solar.
Although there is no pending legislation at this time, if the retail jurisdictions served by Electric Utilities and Infrastructure become subject to deregulation, the recovery of stranded costs could become a significant consideration. Stranded costs primarily include the generation assets of Electric Utilities and Infrastructure whose value in a competitive marketplace may be less than their current book value, as well as above-market purchased power commitments from qualifying facilities (QFs). The Public Utility Regulatory Policies Act of 1978 (PURPA) established a new class of generating facilities as QFs, typically small power production facilities that generate power within a utility company’s service territory for which the utility companies are legally obligated to purchase the energy at an avoided cost rate. Thus far, all states that have passed restructuring legislation have provided for the opportunity to recover a substantial portion of stranded costs.

10


PART I

Electric Utilities and Infrastructure’s largest stranded cost exposure is primarily related to Duke Energy Florida’s purchased power commitments with QFs, under which it has future minimum expected capacity payments through 2043 of $2.4 billion. Duke Energy Florida was obligated to enter into these contracts under provisions of PURPA. Duke Energy Florida continues to seek ways to address the impact of escalating payments under these contracts. However, the FPSC allows full recovery of the retail portion of the cost of power purchased from QFs. For additional information related to these purchased power commitments, see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies.”
In Ohio, Electric Utilities and Infrastructure conducts competitive auctions for electricity supply. The cost of energy purchased through these auctions is recovered from retail customers. Electric Utilities and Infrastructure earns retail margin in Ohio on the transmission and distribution of electricity, andbut not on the cost of the underlying energy.
Competition in the regulated electric distribution business is primarily from the development and deployment of alternative energy sources including on-site generation from industrial customers and distributed generation, such as private solar, at residential, general service and/or industrial customer sites.
Wholesale
Duke Energy competes with other utilities and merchant generators for bulk power sales, sales to municipalities and cooperatives and wholesale transactions under primarily cost-based contracts approved by FERC. The principal factors in competing for these sales are price, availability of capacity and power, and reliability of service.service and price. Prices are influenced primarily by market conditions and fuel costs.
Increased competition in the wholesale electric utility industry and the availability of transmission access could affect Electric Utilities and Infrastructure’s load forecasts, plans for power supply and wholesale energy sales and related revenues. Wholesale energy sales will be impacted by the extent to which additional generation is available to sell to the wholesale market and the ability of Electric Utilities and Infrastructure to attract new customers and to retain existing customers.
Energy Capacity and Resources
Electric Utilities and Infrastructure owns approximately 49,506 megawatts (MW)50,880 MW of generation capacity. For additional information on owned generation facilities, see Item 2, “Properties.”

Energy and capacity are also supplied through contracts with other generators and purchased on the open market. Factors that could cause Electric Utilities and Infrastructure to purchase power for its customers may include, but are not limited to, generating plant outages, extreme weather conditions, generation reliability, demand growth and price. Electric Utilities and Infrastructure has interconnections and arrangements with its neighboring utilities to facilitate planning, emergency assistance, sale and purchase of capacity and energy and reliability of power supply.
Electric Utilities and Infrastructure’s generation portfolio is a balanced mix of energy resources having different operating characteristics and fuel sources designed to provide energy at the lowest possible cost to meet its obligation to serve retail customers. All options, including owned generation resources and purchased power opportunities, are continually evaluated on a real-time basis to select and dispatch the lowest-cost resources available to meet system load requirements.
Potential Plant Retirements

The Subsidiary Registrants periodically file Integrated Resource Plans (IRP) with state regulatory commissions. The IRPs provide a view of forecasted energy needs over a long term (10 to 20 years) and options being considered to meet those needs. Recent IRPs filed by the Subsidiary Registrants included planning assumptions to potentially retire certain coal-fired generating facilities earlier than their current estimated useful lives, primarily because these facilities do not have the requisite emission control equipment to meet United States Environmental Protection Agency (EPA) regulations recently approved or proposed. Duke Energy continues to evaluate the potential need to retire these coal-fired generating facilities earlier than the current estimated useful lives and plans to seek regulatory recovery for amounts that would not be otherwise recovered when any of these assets are retired. For additional information related to potential plant retirements, see Note 4 to the Consolidated Financial Statements, “Regulatory Matters.”
On October 23, 2015, the EPA published in the Federal Register the final Clean Power Plan (CPP) rule that regulates carbon dioxide (CO2) emissions from existing fossil fuel-fired electric generating units (EGUs). The CPP establishes CO2 emission rates and mass cap goals that apply to existing fossil fuel-fired EGUs. Petitions challenging the rule were filed by several groups and on February 9, 2016, the Supreme Court issued a stay of the final CPP rule, halting implementation of the CPP until legal challenges are resolved. States in which the Duke Energy Registrants operate have suspended work on the CPP in response to the stay. Oral arguments before 10 of the 11 judges on D.C. Circuit Court were heard on September 27, 2016. The court has not issued its opinion in the case.
On March 28, 2017, President Trump signed an executive order directing EPA to review the CPP and determine whether to suspend, revise or rescind the rule. On the same day, the Department of Justice (DOJ) filed a motion with the D.C. Circuit Court requesting that the court stay the litigation of the rule while it is reviewed by EPA. On April 28, 2017, the court issued an order to suspend the litigation for 60 days. On August 8, 2017, the court, on its own motion, extended the suspension of the litigation for an additional 60 days. On October 16, 2017, EPA issued a Notice of Proposed Rulemaking (NPR) to repeal the CPP based on a change to EPA’s legal interpretation of the section of the Clean Air Act (CAA) on which the CPP was based. In the proposal, EPA indicates that it has not determined whether it will issue a rule to replace the CPP, and if it will do so, when and what form that rule will take. The comment period on EPA's NPR ends April 26, 2018. On December 28, 2017 EPA issued an Advance Notice of Proposed Rulemaking (ANPRM) in which it seeks public comment on various aspects of a potential CPP replacement rule. The comment period on the ANPRM ends February 26, 2018. If EPA decides to move forward with a CPP replacement rule, it will need to issue a formal proposal for public comment. Litigation of the CPP remains on hold in the D.C. Circuit and the February 2016 U.S. Supreme Court stay of the CPP remains in effect.

11

BUSINESS

PART I

Should the CPP be upheld, compliance could cause the industry to replace coal-fired generation with natural gas and renewables. Costs to operate coal-fired generation plants continue to grow due to increasing environmental compliance requirements, including ash management costs unrelated to CPP, which may result in the retirement of coal-fired generation plants earlier than the current end of useful lives. The Duke Energy Registrants could incur increased fuel, purchased power, operation and maintenance and other costs for replacement generation as a result of this rule. Due to the uncertainties related to the implementation of the CPP, the Duke Energy Registrants cannot predict the outcome of these matters.
Sources of Electricity
Electric Utilities and Infrastructure relies principally on coal, nuclear fuel and natural gas for its generation of electricity. The following table lists sources of electricity and fuel costs for the three years ended December 31, 2017.2018.
  Cost of Delivered Fuel per Net  Cost of Delivered Fuel per Net
Generation by Source Kilowatt-hour Generated (Cents)Generation by Source Kilowatt-hour Generated (Cents)
2017
 2016
 2015
 2017
 2016
 2015
2018
 2017
 2016
 2018
 2017
 2016
Coal(a)
27.4% 27.1% 29.0% 2.72
 3.07
 3.24
24.4% 27.4% 27.1% 2.82
 2.72
 3.07
Nuclear(a)
27.8% 27.4% 27.0% 0.69
 0.66
 0.65
26.0% 27.8% 27.4% 0.50
 0.69
 0.66
Natural gas and oil(a)
23.6% 22.9% 23.1% 2.85
 3.07
 3.74
26.2% 23.6% 22.9% 3.57
 2.85
 3.07
All fuels (cost-based on weighted average)(a)
78.8% 77.4% 79.1% 2.04
 2.22
 2.50
76.6% 78.8% 77.4% 2.29
 2.04
 2.22
Hydroelectric and solar(b)
0.7% 0.7% 0.8%      1.3% 0.7% 0.7%      
Total generation79.5% 78.1% 79.9%      77.9% 79.5% 78.1%      
Purchased power and net interchange20.5% 21.9% 20.1%      22.1% 20.5% 21.9%      
Total sources of energy100.0% 100.0% 100.0%      100.0% 100.0% 100.0%      
(a)Statistics related to all fuels reflect Electric Utilities and Infrastructure's ownership interest in jointly owned generation facilities.
(b)Generating figures are net of output required to replenish pumped storage facilities during off-peak periods. 
Coal
Electric Utilities and Infrastructure meets its coal demand through a portfolio of long-term purchase contracts and short-term spot market purchase agreements. Large amounts of coal are purchased under long-term contracts with mining operators who mine both underground and at the surface. Electric Utilities and Infrastructure uses spot market purchases to meet coal requirements not met by long-term contracts. Expiration dates for its long-term contracts, which have various price adjustment provisions and market re-openers,reopeners, range from 20182019 to 20202021 for Duke Energy Carolinas, 2018 to 2020 for Duke Energy Progress 2018and Duke Energy Ohio, 2019 to 2020 for Duke Energy Florida 2018 to 2020 for Duke Energy Ohio and 20182019 to 2025 for Duke Energy Indiana. Electric Utilities and Infrastructure expects to renew these contracts or enter into similar contracts with other suppliers as existing contracts expire, though prices will fluctuate over time as coal markets change. Electric Utilities and Infrastructure has an adequate supply of coal under contract to meet its hedging guidelines regarding projected future consumption. As a result of volatility in natural gas prices and the associated impacts on coal-fired dispatch within the generation fleet, coal inventories will continue to fluctuate. Electric Utilities and Infrastructure continues to actively manage its portfolio and has worked with suppliers to obtain increased flexibility in its coal contracts.
Coal purchased for the Carolinas is primarily produced from mines in Central Appalachia, Northern Appalachia and the Illinois Basin. Coal purchased for Florida is primarily produced from mines in Colorado and the Illinois Basin. Coal purchased for Kentucky is delivered by barge and is produced from mines along the Ohio River in Illinois, Ohio, West Virginia and Pennsylvania. Coal purchased for Indiana is primarily produced in Indiana and Illinois. The current average sulfur content of coal purchased by Electric Utilities and Infrastructure is between 1.5 percent and 2 percent for Duke Energy Carolinas between 1.5 percent and 2 percent for Duke Energy Progress, between 1 percent and 3 percent for Duke Energy Florida, between 3 percent and 3.5 percent for Duke Energy Ohio and between 2.5 percent and 3 percent for Duke Energy Indiana. Electric Utilities and Infrastructure's environmental controls, in combination with the use of sulfur dioxide (SOSO2) emission allowances, enable Electric Utilities and Infrastructure to satisfy current SO2 emission limitations for its existing facilities.
Nuclear
The industrial processes for producing nuclear generating fuel generally involve the mining and milling of uranium ore to produce uranium concentrates and services to convert, enrich and fabricate fuel assemblies.
Electric Utilities and Infrastructure has contracted for uranium materials and services to fuel its nuclear reactors. Uranium concentrates, conversion services and enrichment services are primarily met through a diversified portfolio of long-term supply contracts. The contracts are diversified by supplier, country of origin and pricing. Electric Utilities and Infrastructure staggers its contracting so that its portfolio of long-term contracts covers the majority of its fuel requirements in the near term and decreasing portions of its fuel requirements over time thereafter. Near-term requirements not met by long-term supply contracts have been and are expected to be fulfilled with spot market purchases. Due to the technical complexities of changing suppliers of fuel fabrication services, Electric Utilities and Infrastructure generally sources these services to a single domestic supplier on a plant-by-plant basis using multiyear contracts.
Electric Utilities and Infrastructure has entered into fuel contracts that cover 100 percent of its uranium concentrates, conversion services and enrichment services requirements through at least 20182019 and cover fabrication services requirements for these plants through at least 2027. For future requirements not already covered under long-term contracts, Electric Utilities and Infrastructure believes it will be able to renew contracts as they expire or enter into similar contractual arrangements with other suppliers of nuclear fuel materials and services.

12


PART I

Natural Gas and Fuel Oil
Natural gas and fuel oil supply, transportation and storage for Electric Utilities and Infrastructure’s generation fleet is purchased under standard industry agreements from various suppliers, including Piedmont. Natural gas supply agreements typically provide for a percentage of forecasted burns being procured over time, with varied expiration dates. Electric Utilities and Infrastructure believes it has access to an adequate supply of natural gas and fuel oil for the reasonably foreseeable future.



BUSINESS


Electric Utilities and Infrastructure has certain dual-fuel generating facilities that can operate utilizing both natural gas and fuel oil. The cost of Electric Utilities and Infrastructure’s natural gas and fuel oil is fixed price or determined by published market prices as reported in certain industry publications, plus any transportation and freight costs. Duke Energy Carolinas, Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana use derivative instruments to manage a portion of their exposure to price fluctuations for natural gas. For Duke Energy Florida, there is currently an agreed to moratorium on future hedging with the Florida Public Service Commission.FPSC.
Electric Utilities and Infrastructure has firm interstate and intrastate natural gas transportation agreements and storage agreements in place to support generation needed for load requirements. Electric Utilities and Infrastructure may purchase additional shorter-term natural gas transportation and utilize natural gas interruptible transportation agreements to support generation needed for load requirements. The Electric Utilities and Infrastructure natural gas plants are served by various supply zones and multiple pipelines.
Purchased Power
Electric Utilities and Infrastructure purchases a portion of its capacity and system requirements through purchase obligations, leases and purchase capacity contracts. Electric Utilities and Infrastructure believes it can obtain adequate purchased power capacity to meet future system load needs. However, during periods of high demand, the price and availability of purchased power may be significantly affected.
The following table summarizes purchased power for the previous three years:
2017
 2016
 2015
2018
 2017
 2016
Purchase obligations and leases (in millions of megawatt-hours (MWh))(a)
17.7
 18.0
 14.9
Purchase obligations and leases (in millions of MWh)(a)
21.3
 17.7
 18.0
Purchase capacity under contract (in MW)(b)
4,028
 4,588
 4,573
4,025
 4,028
 4,588
(a)Represents approximately 7 percent of total system requirements for 2018, 2017 and 2016 and 6 percent for 2015.2016.
(b)These agreements include approximately 412 MW of firm capacity under contract by Duke Energy Florida with QFs.
(b)    These agreements include approximately 451 MW of firm capacity under contract by Duke Energy Florida with QFs.
Inventory
Generation of electricity is capital intensive. Electric Utilities and Infrastructure must maintain an adequate stock of fuel and materials and supplies in order to ensure continuous operation of generating facilities and reliable delivery to customers. As of December 31, 2017,2018, the inventory balance for Electric Utilities and Infrastructure was approximately $3.1$2.9 billion. For additional information on inventory, see Note 1 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies.”
Ash Basin Management
The North Carolina Coal Ash Management Act of 2014 (Coal Ash Act) regulates the handling of coal ash within the state and requires closure of ash impoundments by no later than December 31, 2029, based on risk rankings, among other detailed requirements. The Coal Ash Act leaves the decision on cost recovery determinationsDuring 2015, EPA regulations were enacted related to closurethe management of coal ashCCR from power plants. These regulations classify CCR as nonhazardous waste under the RCRA and apply to electric generating sites with new and existing landfills, new and existing surface impoundments, structural fills and CCR piles, and establishes requirements regarding landfill design, structural integrity design and assessment criteria for surface impoundments, groundwater monitoring, protection and remedial procedures and other operational and reporting procedures for the disposal and management of CCR. In addition to the federal regulations, CCR landfills and surface impoundments (ash basins or impoundments) will continue to be independently regulated by existing state laws, regulations and permits, including the normal ratemaking processes before utility regulatory commissions. Duke EnergyCoal Ash Act in North Carolina.
Electric Utilities and Infrastructure has and will periodically submit to applicable authorities required site-specific coal ash impoundment remediation or closure plans. These plans and all associated permits must be approved before any work can begin.
On April 17, Closure activities began in 2015 at the EPA published in the Federal Register a rule to regulate the disposal of coal combustion residuals (CCR) from electric utilities as solid waste. The rule classifies CCR as nonhazardous under Subtitle D of the Resource Conservation and Recovery Act (RCRA). The EPA CCR rule has certain requirements, which if not met could initiate impoundment closure and require closure completion within five years. The EPA CCR rule includes extension requirements, which if met could allow the extension of closure completion by up to 10 years. The RCRA and the Coal Ash Act finalized the legal framework related to coal ash management practices and ash basin closure.
Duke Energy has advanced the strategy and implementation for the remediation or closure of coal ash basins. In 2015, Duke Energy began activities at certain North Carolinafour sites specified as high priority by the Coal Ash Act including moving coal ashand at the W.S. Lee Steam Station site in South Carolina in connection with other legal requirements. Excavation at these sites involves movement of CCR materials to off-site locations for use inas structural fill, to appropriate engineered off-site or toon-site lined landfills. Additional modifications to operating coal plants are underway to comply withlandfills or conversion of the ash for beneficial use. At other sites, preliminary planning and closure methods have been studied and factored into the estimated retirement and management costs. The Coal Ash Act requires CCR surface impoundments in North Carolina to be closed, with the closure method and RCRA.timing based on a risk ranking classification determined by legislation or state regulators. Additionally, the RCRA required closure timing depends upon meeting or continuing to meet certain criteria.
The Coal Ash Act leaves the decision on cost recovery determinations related to closure of coal ash surface impoundments to the normal ratemaking processes before utility regulatory commissions. Duke Energy Carolinas and Duke Energy Progress have included compliance costs associated with the EPA CCR rule and the Coal Ash Act in their respective rate case filings. During 2017, Duke Energy Carolinas' and Duke Energy Progress’ wholesale contracts were amended to include the recovery of expenditures related to asset retirement obligations for the closure of coal ash basins. The amended contracts have retail disallowance parity or provisions limiting challenges to CCR cost recovery actions at FERC. FERC approved the amended wholesale rate schedules in 2017. For additional information on the ash basins and recovery, see Item 7, "Other Matters" and Notes 4, 5 and 9 to the Consolidated Financial Statements, "Regulatory Matters," "Commitments and Contingencies" and "Asset Retirement Obligations," respectively.

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PART I

Nuclear Matters
Duke Energy owns, wholly or partially, 11 operating nuclear reactors located at six operating stations. The Crystal River Unit 3 Nuclear Plant (Crystal River Unit 3) permanently ceased operation in February 2013. Nuclear insurance includes: nuclear liability coverage; property damage coverage; nuclear accident decontamination and premature decommissioning coverage; and accidental outage coverage for losses in the event of a major accidental outage. Joint owners reimburse Duke Energy for certain expenses associated with nuclear insurance in accordance with joint owner agreements. The Price-Anderson Act requires plant owners to provide for public nuclear liability claims resulting from nuclear incidents to the maximum total financial protection liability, which is approximately $13.4$14.1 billion. For additional information on nuclear insurance see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies.”



BUSINESS


Duke Energy has a significant future financial commitment to dispose of spent nuclear fuel and decommission and decontaminate each plant safely. The NCUC, PSCSC and FPSC require Duke Energy to update their cost estimates for decommissioning their nuclear plants every five years.
The following table summarizes the fair value of NDTF balances and the most recent site-specific nuclear decommissioning trust fund (NDTF) balances and cost study results for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida. Decommissioning costs in the table below are stated in 2013 or2018 dollars for Duke Energy Carolinas, 2017 dollars for Duke Energy Florida and 2014 dollars depending the year of the cost study,for Duke Energy Progress, and include costs to decommission plant components not subject to radioactive contamination.
NDTF(a)
 Decommissioning
 
NDTF(a)
 Decommissioning
 
(in millions)December 31, 2017
 December 31, 2016
 
Costs(a)(b)

 Year of Cost StudyDecember 31, 2018
 December 31, 2017
 
Costs(a)

 Year of Cost Study
Duke Energy$7,097
 $6,205
 $8,150
 2013 and 2014$6,720
 $7,097
 $8,737
 2014 and 2018
Duke Energy Carolinas(c)3,772
 3,273
 3,420
 20133,558
��3,772
 4,291
 2018
Duke Energy Progress2,588
 2,217
 3,550
 20142,503
 2,588
 3,550
 2014
Duke Energy Florida(c)(d)
736
 715
 1,180
 2013659
 736
 896
 2018
(a)    Amounts for Progress Energy equal the sum of Duke Energy Progress and Duke Energy Florida.
(a)Amounts for Progress Energy equal the sum of Duke Energy Progress and Duke Energy Florida.
(b)Amounts include the Subsidiary Registrants'Decommissioning cost for Duke Energy Carolinas reflects its ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors.
(c)Duke Energy Carolinas' site-specific nuclear decommissioning cost study completed in 2018 is expected to be filed with the NCUC and PSCSC by the second quarter 2019. Duke Energy Carolinas will also complete a new funding study, which will be completed and filed with the NCUC and PSCSC in 2019.
(d)Duke Energy Florida's site-specific nuclear decommissioning cost study and a new funding study were completed and filed with the FPSC in 2018. For the years ended December 31, 2017 and December 31, 2018, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
The NCUC, PSCSC, FPSC and FERC have allowed Electric Utilities and Infrastructure to recover estimated decommissioning costs through retail and wholesale rates over the expected remaining service periods of their nuclear stations. Electric Utilities and Infrastructure believes the decommissioning costs being recovered through rates, when coupled with the existing fund balances and expected fund earnings, will be sufficient to provide for the cost of future decommissioning. For additional information, see Note 9 to the Consolidated Financial Statements, “Asset Retirement Obligations.”
The Nuclear Waste Policy Act of 1982 (as amended) (NWPA)NWPA provides the framework for development by the federal government of interim storage and permanent disposal facilities for high-level radioactive waste materials. The government has not yet developed a storage facility or disposal capacity, so Electric Utilities and Infrastructure will continue to store spent fuel on its reactor sites.
Under federal law, the U.S. Department of Energy (DOE)DOE is responsible for the selection and construction of a facility for the permanent disposal of spent nuclear fuel and high-level radioactive waste. The DOE terminated the project to license and develop a geologic repository at Yucca Mountain, Nevada in 2010, and is currently taking no action to fulfill its responsibilities to dispose of spent fuel.
Until the DOE begins to accept the spent nuclear fuel, Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida will continue to safely manage their spent nuclear fuel. Under current regulatory guidelines, Shearon Harris Nuclear Plant (Harris) has sufficient storage capacity in its spent fuel pools through the expiration of its renewed operating license. Crystal River Unit 3 ceased operation in 2013 and was placed in a SAFSTOR condition in January 2018. As of January 2018, all spent fuel at Crystal River Unit 3 has been transferred from the spent fuel pool to dry storage at an on-site independent spent fuel storage installation where it will be stored until the DOE removes it.ISFSI. With certain modifications and approvals by the U.S. Nuclear Regulatory Commission (NRC)NRC to expand the on-site dry cask storage facilities, spent nuclear fuel dry storage facilities will be sufficient to provide storage space of spent fuel through the expiration of the operating licenses, including any license renewals, for the Brunswick, Nuclear Plant (Brunswick), Catawba, Nuclear Station (Catawba), McGuire, Nuclear Station (McGuire), Oconee Nuclear Station (Oconee) and Robinson Nuclear Plant (Robinson).Robinson.
The nuclear power industry faces uncertainties with respect to the cost and long-term availability of disposal sites for spent nuclear fuel and other radioactive waste, compliance with changing regulatory requirements, capital outlays for modifications and new plant construction.



14

BUSINESS

PART I

Electric Utilities and Infrastructure is subject to the jurisdiction of the NRC for the design, construction and operation of its nuclear generating facilities. The following table includes the current year of expiration of nuclear operating licenses for nuclear stations in operation. Nuclear operating licenses are potentially subject to extension.
UnitYear of Expiration
Duke Energy Carolinas 
Catawba Units 1 and 22043
McGuire Unit 12041
McGuire Unit 22043
Oconee Units 1 and 22033
Oconee Unit 32034
Duke Energy Progress 
Brunswick Unit 12036
Brunswick Unit 22034
Harris2046
Robinson2030
The NRC has acknowledged permanent cessation of operation and permanent removal of fuel from the reactor vessel at Crystal River Unit 3. Therefore, the license no longer authorizes operation of the reactor. For additional information on nuclear decommissioning activity, see NoteNotes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters.Matters" and "Asset Retirement Obligations," respectively.
On October 27, 2016, and December 15, 2016, the NRC issued combined operating licenses for Levy and Lee Nuclear Station, respectively. On August 29, 2017, Duke Energy Florida's proposedannounced the complete abandonment of the Levy Nuclear Plant Units 1 and 2 (Levy) and Duke Energy Carolinas' William States Lee III Nuclear Station Units 1 and 2, respectively.project; the operating license was formally terminated on April 26, 2018. On August 25, 2017, as part of Duke Energy Carolinas rate case filing, Duke Energy Carolinas requested NCUC approval to cancel the development of the Lee Nuclear Station project with the intent to maintain the combined operating licenses. On August 29, 2017, Duke Energy announced the complete abandonment of the Levy project with the intent to terminate the combined operating licenses. For additional information on these proposed nuclear plants,the Lee Nuclear Station, see Note 4 to the Consolidated Financial Statements, "Regulatory Matters."
Regulation
State
The NCUC, PSCSC, FPSC, PUCO, IURC and KPSC (collectively, the state electric utility commissions) approve rates for Duke Energy's retail electric service within their respective states. The state electric utility commissions, to varying degrees, have authority over the construction and operation of Electric Utilities and Infrastructure’s generating facilities. Certificates of Public Convenience and NecessityCPCN issued by the state electric utility commissions, as applicable, authorize Electric Utilities and Infrastructure to construct and operate its electric facilities and to sell electricity to retail and wholesale customers. Prior approval from the relevant state electric utility commission is required for the entities within Electric Utilities and Infrastructure to issue securities. The underlying concept of utility ratemaking is to set rates at a level that allows the utility to collect revenues equal to its cost of providing service plus earn a reasonable rate of return on its invested capital, including equity.
In addition to rates approved in base rate cases, each of the state electric utility commissions allow recovery of certain costs through various cost-recovery clauses to the extent the respective commission determines in periodic hearings that such costs, including any past over or under-recovered costs, are prudent.
Fuel, fuel-related costs and certain purchased power costs are eligible for recovery by Electric Utilities and Infrastructure. Electric Utilities and Infrastructure uses coal, hydroelectric, natural gas, oil, renewable generation and nuclear fuel to generate electricity, thereby maintaining a diverse fuel mix that helps mitigate the impact of cost increases in any one fuel. Due to the associated regulatory treatment and the method allowed for recovery, changes in fuel costs from year to year have no material impact on operating results of Electric Utilities and Infrastructure, unless a commission finds a portion of such costs to have been imprudent. However, delays between the expenditure for fuel costs and recovery from customers can adversely impact the timing of cash flows of Electric Utilities and Infrastructure.



15

BUSINESS

PART I

The table below reflects significant electric rate case applications approved and effective in the past three years or applications currently pending approval.
  AnnualReturnEquity 
 RegulatoryIncreaseonComponent ofEffective
 Body(in millions)EquityCapital StructureDate
Approved Rate Cases:     
Duke Energy Progress 2016 South Carolina Rate Case(a)
PSCSC(a)
10.1%53%1/1/2017
      
Pending Rate Cases:     
Duke Energy Carolinas 2017 North Carolina Rate CaseNCUC$647
10.75%53%
5/1/2018(d)
Duke Energy Progress 2017 North Carolina Rate Case(b)
NCUC85
9.9%52%
2/1/2018(d)
Duke Energy Progress 2017 North Carolina Rate Case(c)
NCUC221
9.9%52%
2/1/2018(d)
Duke Energy Kentucky 2017 Kentucky Rate CaseKPSC49
10.3%49%
4/15/2018(d)
Duke Energy Ohio 2017 Ohio Rate CasePUCO15
10.4%50.75%
1/1/2018(d)
 
Regulatory
Body
Annual
Increase
(Decrease)
(in millions)
Return
on
Equity
Equity
Component of
Capital Structure
Effective
Date
Approved Rate Cases:     
Duke Energy Carolinas 2017 North Carolina Rate CaseNCUC$(73)9.9%52%8/1/2018
Duke Energy Progress 2017 North Carolina Rate CaseNCUC151
9.9%52%3/16/2018
Duke Energy Ohio 2017 Ohio Electric Rate CasePUCO(19)9.84%50.75%1/2/2019
Duke Energy Kentucky 2017 Kentucky Electric Rate CaseKPSC8
9.725%49%5/1/2018
Duke Energy Progress 2016 South Carolina Rate CasePSCSC(a)
10.1%53%1/1/2017
      
Pending Rate Cases:     
Duke Energy Carolinas 2018 South Carolina Rate CasePSCSC$168
10.5%53%6/1/2019
Duke Energy Progress 2018 South Carolina Rate CasePSCSC59
10.5%53%6/1/2019
(a)An increase of approximately $38 million in revenues was effective January 1, 2017, and an additional increase of approximately $18.5$19 million in revenues was effective January 1, 2018. Duke Energy Progress amortized approximately $18.5 million from the cost of removal reserve in 2017.
(b)On November 22, 2017, Duke Energy Progress and the North Carolina Public Staff filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding, pending NCUC approval.
(c)Represents portions in the original 2017 rate case application not covered by the Agreement and Stipulation of Partial Settlement.
(d)Represents the requested effective dates in the filings. Actual effective dates may differ based on orders from the respective commission.
For more information on rate matters and other regulatory proceedings, see Note 4 to the Consolidated Financial Statements, “Regulatory Matters.”
Federal
The FERC approves Electric Utilities and Infrastructure’s cost-based rates for electric sales to certain power and transmission wholesale customers. Regulations of FERC and the state electric utility commissions govern access to regulated electric and other data by nonregulated entities and services provided between regulated and nonregulated energy affiliates. These regulations affect the activities of nonregulated affiliates with Electric Utilities and Infrastructure.
Regional Transmission Organizations (RTO). PJM Interconnection, LLC (PJM) and Midcontinent Independent System Operator, Inc. (MISO)MISO are the Independent System Operators (ISO)ISOs and FERC-approved RTOs for the regions in which Duke Energy Ohio and Duke Energy Indiana operate. PJM and MISO operate energy, capacity and other markets, and control the day-to-day operations of bulk power systems through central dispatch.
Duke Energy Ohio is a member of PJM and Duke Energy Indiana is a member of MISO. Transmission owners in these RTOs have turned over control of their transmission facilities and their transmission systems are currently under the dispatch control of the RTOs. Transmission service is provided on a regionwide, open-access basis using the transmission facilities of the RTO members at rates based on the costs of transmission service.
Environmental. Electric Utilities and Infrastructure is subject to the jurisdiction of the EPA and state and local environmental agencies. For a discussion of environmental regulation, see “Environmental Matters” in this section. See the “Other Matters” section of MD&AManagement's Discussion and Analysis for a discussion about potential Global Climate Change legislation and other EPA regulations under development and the potential impacts such legislation and regulation could have on Duke Energy’s operations.



BUSINESS


GAS UTILITIES AND INFRASTRUCTURE
Gas Utilities and Infrastructure conducts natural gas operations primarily through the regulated public utilities of Piedmont and Duke Energy Ohio. The natural gas operations are subject to the rules and regulations of the NCUC, PSCSC, PUCO, KPSC, Tennessee Public Utility Commission (TPUC), Pipeline and Hazardous Materials Safety Administration (PHMSA)TPUC, PHMSA and the FERC. Gas Utilities and Infrastructure serves residential, commercial, industrial and power generation natural gas customers, including customers served by municipalities who are wholesale customers. Gas Utilities and Infrastructure has over 1.51.6 million customers, including more than 11.1 million customers located in North Carolina, South Carolina and Tennessee, and an additional 526,000531,000 customers located within southwestern Ohio and northern Kentucky. In the Carolinas, Ohio and Kentucky, the service areas are comprised of numerous cities, towns and communities. In Tennessee, the service area is the metropolitan area of Nashville. The following map shows the service territory and investments in operating and proposed midstream properties for Gas Utilities and Infrastructure as of December 31, 2018.
servicemap2018gas001.jpg
The number of residential, commercial and industrial customers within the Gas Utilities and Infrastructure service territory is expected to increase over time. Average usage per residential customer is expected to remain flat or decline for the foreseeable future, however decoupled rates in North Carolina and various rate design mechanisms in other jurisdictions partially mitigate the impact of the declining usage per customer on overall profitability. While total industrial and general service sales increased in 20172018 when compared to 2016,2017, the growth rate was modest when compared to historical periods.
Gas Utilities and Infrastructure also owns, operates and has investments in various pipeline transmission and natural gas storage facilities.

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PART I

Natural Gas for Retail Distribution
Gas Utilities and Infrastructure is responsible for the distribution of natural gas to retail customers in its North Carolina, South Carolina, Tennessee, Ohio and Kentucky service territories. Gas Utilities and Infrastructure’s natural gas procurement strategy is to contract primarily with major and independent producers and marketers for natural gas supply. It also purchases a diverse portfolio of transportation and storage service from interstate pipelines. This strategy allows Gas Utilities and Infrastructure to assure reliable natural gas supply and transportation for its firm customers during peak winter conditions. When firm pipeline services or contracted natural gas supplies are temporarily not needed due to market demand fluctuations, Gas Utilities and Infrastructure may release these services and supplies in the secondary market under FERC-approved capacity release provisions or make wholesale secondary market sales. In 2017,2018, firm supply purchase commitment agreements provided 100 percent of the natural gas supply for both Piedmont and 100 percent for Duke Energy Ohio.
Seasonality and the



BUSINESS


Impact of Weather
Gas Utilities and Infrastructure's costs andInfrastructure revenues are influenced by seasonal patternsgenerally protected from the impact of weather fluctuations due to peak natural gas sales occurring during the winter months. Residential customers are the most impacted by weather. There are certain regulatory mechanisms for the North Carolina, South Carolina and Tennesseethat are available in most service territories that normalize the margins collected from certain customer classes during the winter, providing for an adjustment either up or down.territories. In North Carolina, rate designmargin decoupling provides protection from both weather and other usage variations such as conservation.like conservation for residential and commercial customer classes. Margin decoupling provides a set revenue per customer independent of actual usage. In South Carolina and Tennessee, weather normalization adjusts revenues are adjusted solely basedeither up or down depending on weather during the periods ofhow much warmer or colder than normal a given month has been. Weather normalization adjustments occur from November through March in South Carolina and from October through April respectively. Rate design for thein Tennessee. Ohio service territory also mitigates the impactscollects most of its non-fuel revenue through a fixed monthly charge that is not impacted by usage fluctuations that result from weather on customer bills. Estimated weather impacts arechanges or conservation. Kentucky, however, bills based on actual current periodvolumetric rates without weather compared to normal weather conditions. Normal weather conditions are defined as the long-term average of actual historical weather conditions.
Degree-day data are used to estimate energy required to maintain comfortable indoor temperatures based on each day’s average temperature. Heating-degree days measure the variation in weather based on the extent the average daily temperature falls below a base temperature. The methodology used to estimate the applicable impact of weather does not consider all variables that may impact customer response to weather conditions, such as wind chill. The precision of this estimate may also be impacted by applying long-term weather trends to shorter-term periods.protection.
Competition
Gas Utilities and Infrastructure’s businesses operate as the sole supplierprovider of natural gas service within their retail service territories, with the exception of Ohio, which has a competitive natural gas supply market for distribution service.territories. Gas Utilities and Infrastructure owns and operates facilities necessary to transport and distribute natural gas. Gas Utilities and Infrastructure earns retail margin on the transmission and distribution of natural gas and not on the cost of the underlying commodity. Services are priced by state commission approved rates designed to include the costs of providing these services and a reasonable return on invested capital. This regulatory policy is intended to provide safe and reliable natural gas service at fair prices.
In residential, commercial and industrial customer markets, natural gas distribution operations compete with other companies that supply energy, primarily electric companies, propane and fuel oil dealers, renewable energy providers and coal companies in relation to sources of energy for electric power plants, as well as nuclear energy. A significant competitive factor is price. Gas Utilities and Infrastructure's primary product competition is with electricity for heating, water heating and cooking. Increases in the price of natural gas or decreases in the price of other energy sources could negatively impact competitive position by decreasing the price benefits of natural gas to the consumer. In the case of industrial customers, such as manufacturing plants, adverse economic or market conditions, including higher natural gas costs, could cause these customers to suspend business operations or to use alternative sources of energy in favor of energy sources with lower per-unit costs.
Higher natural gas costs or decreases in the price of other energy sources may allow competition from alternative energy sources for applications that have traditionally used natural gas, encouraging some customers to move away from natural gas-fired equipment to equipment fueled by other energy sources. Competition between natural gas and other forms of energy is also based on efficiency, performance, reliability, safety and other non-price factors. Technological improvements in other energy sources and events that impair the public perception of the non-price attributes of natural gas could erode our competitive advantage. These factors in turn could decrease the demand for natural gas, impair our ability to attract new customers and cause existing customers to switch to other forms of energy or to bypass our systems in favor of alternative competitive sources. This could result in slow or no customer growth and could cause customers to reduce or cease using our product, thereby reducing our ability to make capital expenditures and otherwise grow our business, adversely affecting our earnings.
Pipeline and Storage Investments
Duke Energy, through its Gas Utilities and Infrastructure segment, is a 47 percent equity member of Atlantic Coast Pipeline, LLC (ACP) thatACP, which plans to build and own the proposed Atlantic Coast Pipeline (ACP Pipeline),ACP pipeline, an approximately 600-mile interstate natural gas pipeline, regulated by FERC. Prior to the Piedmont acquisition, Duke Energy owned a 40 percent equity ownership in ACP. The ACP pipeline is intended to transport diverse natural gas supplies into southeastern markets. Duke Energy Carolinas, Duke Energy Progress and Piedmont, among others, will be customers of the ACP pipeline. The targetedACP expects to achieve a late 2020 in-service date for key segments of the pipeline is late 2019.project, while it expects a remainder to extend into 2021. Abnormal weather, work delays (including delays due to judicial or regulatory action) and other conditions may result in cost or schedule modifications in the future. ACP and Duke Energy will continue to consider their options with respect to the foregoing in light of their existing contractual and legal obligations.
Gas Utilities and Infrastructure also has a 7.5 percent equity ownership interest in Sabal Trail Transmission, LLC (Sabal Trail).Trail. Sabal Trail is a joint venture that owns a 515-mile natural gasthe Sabal Trail pipeline (Sabal Trail pipeline) to transport natural gas to Florida, regulated by FERC. The Sabal Trail phase one mainline was placed into service in July 2017 and traverses Alabama, Georgia and Florida. A request to place in-service aThe remaining lateral line to the Duke Energy Florida's Citrus County Combined Cycle facility is pending with FERC. Current legal challenges to the Sabal Trail pipeline are ongoing, which may have an impact on continuing operations of the pipeline.CC was placed into service in March 2018.
Gas Utilities and Infrastructure has a 24 percent equity ownership interest in Constitution, Pipeline Company, LLC (Constitution), an interstate pipeline development company formed to develop, construct, own and operate a 124-mile natural gas pipeline and related facilities, connecting shaleregulated by FERC. Constitution is slated to transport natural gas supplies and gathering systemsfrom the Marcellus supply region in Susquehanna County,northern Pennsylvania to Iroquois Gas Transmission and Tennessee Gas Pipeline systems in New York, regulated by FERC.major northeastern markets. As a result of permitting delays and project uncertainty, Constitution is unable to approximate an in-service date.

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PART I

As a result of the Piedmont acquisition, Duke Energy, through its Gas Utilities and Infrastructure segment, has a 21.49 percent equity ownership interest in Cardinal, Pipeline Company, LLC (Cardinal), an intrastate pipeline located in North Carolina regulated by the NCUC, a 45 percent equity ownership in Pine Needle, LNG Company, LLC (Pine Needle), an interstate liquefied natural gas storage facility located in North Carolina and a 50 percent equity ownership interest in Hardy Storage, Company, LLC (Hardy Storage), an underground interstate natural gas storage facility located in Hardy and Hampshire counties in West Virginia. Pine Needle and Hardy Storage are regulated by FERC.
KO Transmission, Company (KO Transmission), a wholly owned subsidiary of Duke Energy Ohio, is an interstate pipeline company engaged in the business of transporting natural gas and is subject to the rules and regulations of FERC. KO Transmission's 90-mile pipeline supplies natural gas to Duke Energy Ohio and interconnects with the Columbia Gulf Transmission pipeline and Tennessee Gas Pipeline. An approximately 70-mile portion of KO Transmission's pipeline facilities is co-owned by Columbia Gas Transmission Corporation.
See Notes 4, 12 and 17 to the Consolidated Financial Statements, "Regulatory Matters," "Investments in Unconsolidated Affiliates" and "Variable Interest Entities," respectively, for further information on Duke Energy's pipeline investments.



BUSINESS


Inventory
Gas Utilities and Infrastructure must maintain adequate natural gas inventory in order to provide reliable delivery to customers. As of December 31, 20172018, the inventory balance for Gas Utilities and Infrastructure was $106$105 million. For more information on inventory, see Note 1 to the Consolidated Financial Statements, "Summary of Significant Accounting Policies."
Regulation
State
The NCUC, PSCSC, PUCO, TPUC and KPSC (collectively, the state gas utility commissions) approve rates for Duke Energy's retail natural gas service within their respective states. The state gas utility commissions, to varying degrees, have authority over the construction and operation of Gas Utilities and Infrastructure’s natural gas distribution facilities. Certificates of Public Convenience and NecessityCPCN or Certificates of Environmental Compatibility and Public Necessity issued by the state gas utility commissions or other government agencies, as applicable, authorize Gas Utilities and Infrastructure to construct and operate its natural gas distribution facilities and to sell natural gas to retail and wholesale customers. Prior approval from the relevant state gas utility commission is required for Gas Utilities and Infrastructure to issue securities. The underlying concept of utility ratemaking is to set rates at a level that allows the utility to collect revenues equal to its cost of providing service plus a reasonable rate of return on its invested capital, including equity.
In addition to amounts collected from customers thoughthrough approved base rates, each of the state gas utility commissions allow recovery of certain costs through various cost-recovery clauses to the extent the respective commission determines in periodic hearings that such costs, including any past over- or under-recovered costs, are prudent.
Natural gas costs are eligible for recovery by Gas Utilities and Infrastructure. Due to the associated regulatory treatment and the method allowed for recovery, changes in natural gas costs from year to year have no material impact on operating results of Gas Utilities and Infrastructure, unless a commission finds a portion of such costs to have not been prudent. However, delays between the expenditure for natural gas and recovery from customers can adversely impact the timing of cash flows of Gas Utilities and Infrastructure.
The following table summarizes certain components underlying recently approved and effective base rates or rate stabilization filings in the last three years.
 Annual
 Return
 Equity
  
 Increase
 on
 Component of
  
 (in millions)
 Equity
 Capital Structure
 Effective Date
Piedmont 2016 South Carolina Rate Stabilization Adjustment Filing(a)
8
 10.2% 53.0% November 2016
Piedmont 2017 South Carolina Rate Stabilization Adjustment Filing(a)
6
 10.2% 53.0% November 2017
 
Annual
Increase
(Decrease)
(in millions)
 
Return
on
Equity
 
Equity
Component of
Capital Structure
 Effective Date
Approved Rate Cases:       
Piedmont 2016 South Carolina Rate Stabilization Adjustment Filing$8
 10.2% 53.0% November 2016
Piedmont 2017 South Carolina Rate Stabilization Adjustment Filing6
 10.2% 53.0% November 2017
Piedmont 2018 South Carolina Rate Stabilization Adjustment Filing(14) 10.2% 53.0% November 2018
Pending Rate Cases:       
Duke Energy Kentucky 2018 Kentucky Gas Rate Case$11
 9.9% 50.755% April 2019
(a)Under the rate stabilization adjustment mechanism, Piedmont resets rates in South Carolina based on updated costs and revenues on an annual basis.
Gas Utilities and Infrastructure has integrity management rider (IMR)IMR mechanisms in North Carolina and Tennessee designed to separately track and recover certain costs associated with capital investments incurred to comply with federal pipeline safety and integrity programs, as well as additional state safety and integrity requirements in Tennessee. The following table summarizes information related to recently approved or pending IMR filings.
 Cumulative
 Annual Margin
 Effective
(in millions)Investment
 Revenues
 Date
Piedmont 2017 IMR Filing – North Carolina(a)
$738
 $77
 December 2017
Piedmont 2016 IMR Filing – Tennessee(b)
193
 23
 January 2017
      
Pending Filing:    Proposed Effective Date
Piedmont 2017 IMR Filing – Tennessee(c)
$231
 $23.4
 January 2018
 Cumulative
 Annual Margin
 Effective
(in millions)Investment
 Revenues
 Date
Piedmont 2018 IMR Filing – North Carolina$924
 $81
 December 2018
Pending Filing:    Proposed Effective Date
Piedmont 2018 IMR Filing – Tennessee$259
 $26
 January 2019

18


PART I

(a)    Cumulative investment amounts through September 30, 2017.
(b)    Cumulative investment amounts through October 31, 2016.
(c)Cumulative investment amounts through October 31, 2017. A ruling from the TPUC is pending.
For more information on rate matters and other regulatory proceedings, see Note 4 to the Consolidated Financial Statements, “Regulatory Matters.”
Federal
Gas Utilities and Infrastructure is subject to various federal regulations, including regulations that are particular to the natural gas industry. These federal regulations include but are not limited to the following:
Regulations of the FERC affect the certification and siting of new interstate natural gas pipeline projects, the purchase and sale of, the prices paid for, and the terms and conditions of service for the interstate transportation and storage of natural gas.
Regulations of the PHMSA affect the design, construction, operation, maintenance, integrity, safety and security of natural gas distribution and transmission systems.



BUSINESS


Regulations of the EPA relate to the environment including proposed air emissions regulations that would expand to include emissions of methane. For a discussion of environmental regulation, see “Environmental Matters” in this section. Refer to the “Other Matters” section of Management’sManagement's Discussion and Analysis of Financial Condition and Results of Operations for a discussion about potential Global Climate Change legislation and other EPA regulations under development and the potential impacts such legislation and regulation could have on Duke Energy’s operations.
Regulations of FERC and the state gas utility commissions govern access to regulated natural gas and other data by nonregulated entities and services provided between regulated and nonregulated energy affiliates. These regulations affect the activities of nonregulated affiliates with Gas Utilities and Infrastructure.
Environmental. Gas Utilities and Infrastructure is subject to the jurisdiction of the EPA and state and local environmental agencies. For a discussion of environmental regulation, see “Environmental Matters” in this section. See “Other Matters” section of Management's Discussion and Analysis for a discussion about potential Global Climate Change legislation and other EPA regulations under development and the potential impacts such legislation and regulation could have on Duke Energy’s operations.
COMMERCIAL RENEWABLES
Commercial Renewables primarily acquires, develops, builds, developsoperates and operatesowns wind and solar renewable generation throughout the continental U.S. The portfolio includes nonregulated renewable energy and energy storage businesses.
Commercial Renewables' renewable energy includes utility-scale wind and solar generation assets, distributed solar generation assets and a battery storage project, which total 2,9072,991 MW across 1419 states from 21 wind facilities, 100 solar facilities and 63 solar facilities.one battery storage facility. Revenues are primarily generated by selling the power produced from renewable generation through long-term contracts to utilities, electric cooperatives, municipalities and commercial and industrial customers. In most instances, these customers have obligations under state-mandated renewable energy portfolio standards or similar state or local renewable energy goals. Energy and renewable energy credits generated by wind and solar projects are generally sold at contractual prices. In addition,The following map shows the service territory for Commercial Renewables as of December 31, 2018.
servicemap2018cr001.jpg
As eligible wind and solar projects are placed in service, Commercial Renewables recognizes either investment tax credits (ITCs)PTCs as power is generated by wind projects over 10 years or ITCs when the renewable solar or wind project achieves commercial availability or production tax credits (PTC) as power is generated by wind projects over 10 years. Renewableavailability. ITCs are recognized over the useful life of the asset as a reduction to depreciation expense with the benefit of the tax basis adjustment due to the ITC being recognized in income in the year of commercial availability. The ITC is being phased down from the current 30 percent rate to a permanent 10 percent rate if construction begins in 2019 through 2022. The PTC is being phased out and wind turbines will earn 10 years of PTCs at phased-out rates if construction begins in 2017 through 2019.



BUSINESS


As part of its growth strategy, Commercial Renewables has expanded its investment portfolio through the addition of distributed solar companies and projects, energy storage systems and energy management solutions specifically tailored to commercial businesses. These investments include the 2015 acquisition of a controlling interest in REC Solar Corp., a California-based provider of solar installations for retail, manufacturing, agriculture, technology, government and nonprofit customers across the U.S. and Phoenix Energy Technologies Inc., a California-based provider of enterprise energy management and information software to commercial businesses. In 2017,
Commercial Renewables has entered into agreements for certain of its solar generating assets that are held by LLCs whose members include a noncontrolling tax equity investor. The allocation of earnings, tax attributes and cash distributions to the tax equity investor are based on certain of the liquidation provisions pursuant to the LLC agreements. The allocations to the tax equity investors can result in variability in earnings to Duke Energy acquired the remaining interest in REC Solar.Energy. As part of its growth strategy, Commercial Renewables expects to enter into these arrangements for future wind and solar generating assets.
For additional information on Commercial Renewables' generation facilities, see Item 2, “Properties.”
Regulation
Commercial Renewables is subject to regulation at the federal level, primarily from the FERC. Regulations of the FERC govern access to regulated market information by nonregulated entities and services provided between regulated and nonregulated utilities.
Market Environment and Competition
Commercial Renewables primarily competes for wholesale contracts for the generation and sale of electricity from wind and solar generation assets it either develops or acquires and owns. The market price of commodities and services, along with the quality and reliability of services provided, drive competition in the wholesale energy business. The number and type of competitors may vary based on location, generation type and project size. Commercial Renewables' main competitors include other nonregulated generators and wholesale power providers.
Sources of Electricity
Commercial Renewables relies on wind, solar and solarbattery resources for its generation of electric energy.
Regulation
Commercial Renewables is subject to regulation at the federal level, primarily from the FERC. Regulations of the FERC govern access to regulated market information by nonregulated entities and services provided between regulated and nonregulated utilities.
OTHER
The remainder of Duke Energy’s operations is presented as Other. While it is not an operatinga business segment, Other primarily includes interest expense on holding company debt, unallocated corporate costs including costs to achieve strategic acquisitions, amounts related to certain companywide initiatives and contributions made to the Duke Energy Foundation. Other also includes Bison Insurance Company Limited (Bison) and an investment in NMC.

19


PART I

The Duke Energy Foundation is a nonprofit organization funded by Duke Energy shareholders that makes charitable contributions to selected nonprofits and government subdivisions.
Bison, a wholly owned subsidiary of Duke Energy, is a captive insurance company with the principal activity of providing Duke Energy subsidiaries with indemnification for financial losses primarily related to property, workers’ compensation and general liability.
NMC isDuke Energy owns a 17.5 percent equity interest in NMC. The joint venture that operatescompany has production facilities in Jubail, Saudi Arabia as a large regional producerwhere it manufactures certain petrochemicals and plastics. The company annually produces approximately 1 million metric tons each of MTBE and methanol and methyl tertiary butyl ether (MTBE), an additivehas the capacity to gasoline. In 2017, NMC produced approximately 934,000produce 50,000 metric tons of methanolpolyacetal. The main feedstocks to produce these products are natural gas and approximately 1,087,000 metric tons of MTBE. Approximately 40 percent of methanol is normally used in MTBE production. Upon the successful startup of NMC's polyacetal production facility during the fourth quarter of 2017, Duke Energy's ownership interest in NMC decreased from 25 percent to 17.5 percent.butane. Duke Energy records the investment activity of NMC using the equity method of accounting and retains 25 percent of NMC's board of directors representation and voting rights.
Regulation
Certain entities within Other are subject to the jurisdiction of federal, state and local agencies.
Employees
On December 31, 2017,2018, Duke Energy had a total of 29,06030,083 employees on its payroll. The total includes 5,4835,446 employees who are represented by labor unions under various collective bargaining agreements that generally cover wages, benefits, working practices, and other terms and conditions of employment.



BUSINESS


Executive Officers of the Registrants
The following table sets forth the individuals who currently serve as executive officers. Executive officers serve until their successors are duly elected or appointed.
Name 
Age(a)
 Current and Recent Positions Held
Lynn J. Good 5859
 
Chairman, President and Chief Executive Officer. Ms. Good was elected as Chairman of the Board, effective January 1, 2016, and assumed her position as President and Chief Executive Officer in July 2013. Prior to that, she served as Executive Vice President and Chief Financial Officer since 2009.
Steven K. Young 5960
 
Executive Vice President and Chief Financial Officer. Mr. Young assumed his current position in August 2013. Prior to that, he had served as Senior Vice President, Chief Accounting Officer and Controller, since Aprilassuming the role of Chief Accounting Officer in July 2012 and the role of Controller in December 2006.
Douglas F Esamann 6061
 
Executive Vice President, Energy Solutions and President, Midwest and Florida Regions. Mr. Esamann assumed his current position in September 2016 and was Executive Vice President and President, Midwest and Florida Regions since June 2015. Prior to that, he wasserved as President, Duke Energy Indiana since November 2010.
Lloyd M. Yates 5758
 
Executive Vice President, Customer and Delivery Operations and President, Carolinas Region. Mr. Yates assumed his current position in September 2016 and was Executive Vice President, Market Solutions and President, Carolinas Region since August 2014. He held the position of Executive Vice President, Regulated Utilities from DecemberNovember 2012 to August 2014, and prior to that, had served as Executive Vice President, Customer Operations since July 2012, upon the merger of Duke Energy and Progress Energy. Prior to the merger, Mr. Yates was President and Chief Executive Officer of Progress Energy Carolinas, Inc., which is now known as Duke Energy Progress, LLC since July 2007.
Dhiaa M. Jamil 6162
 
Executive Vice President and Chief Operating Officer. Mr. Jamil assumed the role of Chief Operating Officer in May 2016. Prior to his current position, he had held the title Executive Vice President and President, Regulated Generation and Transmission since June 2015. Prior to that, he had served as Executive Vice President and President, Regulated Generation since August 2014. He served as Executive Vice President and President of Duke Energy Nuclear from March 2013 to August 2014, and was Chief Nuclear Officer from February 2008 to February 2013. He also served as Chief Generation Officer for Duke Energy from July 2009 to June 2012.
Franklin H. Yoho 5859
 
Executive Vice President and President, Natural Gas.Gas Business. Mr. Yoho assumed his current position in October 2016 upon the acquisition of Piedmont by Duke Energy. Prior to this appointment, he served as Senior Vice President and Chief Commercial Officer of Piedmont since August 2011. Prior to that, he served as Senior Vice President, Commercial Operations since March 2002.
Julia S. Janson 5354
 
Executive Vice President, External Affairs and Chief Legal Officer. Ms. Janson has held the position of Executive Vice President, External Affairs and Chief Legal Officer since November 2018. She originally assumed the position of Executive Vice President, Chief Legal Officer and Corporate Secretary. Ms. Janson assumed her current positionSecretary in December 2012, and in May 2017,then assumed the responsibilities for the External Affairs and Strategic Policy organization. Prior to that, she had held the position of President of Duke Energy Ohio and Duke Energy Kentucky since 2008.in February 2016.
Melissa H. Anderson 5354
 
Executive Vice President, Administration and Chief Human Resources Officer. Ms. Anderson assumed her position in May 2016 and had been Executive Vice President and Chief Human Resources Officer since January 2015. Prior to joining Duke Energy, she served as Senior Vice President of Human Resources at Domtar Inc. since 2010.
William E. Currens Jr.Dwight L. Jacobs 4853
 
Senior Vice President, Chief Accounting Officer, Tax and Controller. Mr. Currens assumed his current position in May 2016.Jacobs has served as Senior Vice President, Chief Accounting Officer, Tax and Controller since January 1, 2019. Prior to that, he had held the position ofserved as Senior Vice President, Investor RelationsChief Accounting Officer and Controller since 2009.June 1, 2018. Prior to that, he served as Senior Vice President, Financial Planning & Analysis since February 2016 and as Chief Risk Officer since July 2014. Prior to his role as Chief Risk Officer, Mr. Jacobs served as Vice President, Rates & Regulatory Strategy since May 2010.
(a)    The ages of the officers provided are as of December 31, 2017.2018.
There are no family relationships between any of the executive officers, nor any arrangement or understanding between any executive officer and any other person involved in officer selection.

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PART I

Environmental Matters
The Duke Energy Registrants are subject to federal, state and local laws and regulations with regard to air and water quality, hazardous and solid waste disposal and other environmental matters. Environmental laws and regulations affecting the Duke Energy Registrants include, but are not limited to:
The Clean Air Act (CAA),CAA, as well as state laws and regulations impacting air emissions, including State Implementation Plans related to existing and new national ambient air quality standards for ozone and particulate matter. Owners and/or operators of air emission sources are responsible for obtaining permits and for annual compliance and reporting.
The Clean Water Act (CWA),CWA, which requires permits for facilities that discharge wastewaters into navigable waters.
The Comprehensive Environmental Response, Compensation and Liability Act, which can require any individual or entity that currently owns or in the past owned or operated a disposal site, as well as transporters or generators of hazardous substances sent to a disposal site, to share in remediation costs.
The National Environmental Policy Act, which requires federal agencies to consider potential environmental impacts in their permitting and licensing decisions, including siting approvals.
Coal Ash Act, as amended, which establishes requirements regarding the use and closure of existing ash basins, the disposal of ash at active coal plants and the handling of surface water and groundwater impacts from ash basins in North Carolina.



BUSINESS


The Solid Waste Disposal Act, as amended by the Resource Conservation and Recovery Act (RCRA),RCRA, which creates a framework for the proper management of hazardous and nonhazardous solid waste; classifies CCR as nonhazardous waste; and establishes standards for landfill and surface impoundment placement, design, operation and closure, groundwater monitoring, corrective action, and post-closure care.
The Toxic Substances Control Act (TSCA),TSCA, which gives EPA the authority to require reporting, recordkeeping and testing requirements, and to place restrictions relating to chemical substances and/or mixtures, including polychlorinated biphenyls.
The proposed ACE rule, which will require states to develop CO2 reduction plans based on efficiency (heat rate) improvements at coal-fired power plants.
For more information on environmental matters, see Notes 5 and 9 to the Consolidated Financial Statements, “Commitments and Contingencies – Environmental” and "Asset Retirement Obligations," respectively, and the “Other Matters” section of MD&A.Management's Discussion and Analysis. Except as otherwise described in these sections, costs to comply with current federal, state and local provisions regulating the discharge of materials into the environment or other potential costs related to protecting the environment are incorporated into the routine cost structure of our various business segments and are not expected to have a material adverse effect on the competitive position, consolidated results of operations, cash flows or financial position of the Duke Energy Registrants.
The "Other Matters" section of MD&AManagement's Discussion and Analysis includes an estimate of future capital expenditures required to comply with environmental regulations and a discussion of Global Climate Change including the potential impact of current and future legislation related to greenhouse gas (GHG)GHG emissions on the Duke Energy Registrants' operations. Recently passed and potential future environmental statutes and regulations could have a significant impact on the Duke Energy Registrants’ results of operations, cash flows or financial position. However, if and when such statutes and regulations become effective, the Duke Energy Registrants will seek appropriate regulatory recovery of costs to comply within its regulated operations.
DUKE ENERGY CAROLINAS
 
Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas’ service area covers approximately 24,000 square miles and supplies electric service to 2.52.6 million residential, commercial and industrial customers. For information about Duke Energy Carolinas’ generating facilities, see Item 2, “Properties.” Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Substantially all of Duke Energy Carolinas' operations are regulated and qualify for regulatory accounting. Duke Energy Carolinas operates one reportable business segment, Electric Utilities and Infrastructure. For additional information regarding this business segment, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”
PROGRESS ENERGY
 
Progress Energy is a public utility holding company primarily engaged in the regulated electric utility business and is subject to regulation by the FERC. Progress Energy conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. When discussing Progress Energy’s financial information, it necessarily includes the results of Duke Energy Progress and Duke Energy Florida.
Substantially all of Progress Energy’s operations are regulated and qualify for regulatory accounting. Progress Energy operates one reportable business segment, Electric Utilities and Infrastructure. For additional information regarding this business segment, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”
DUKE ENERGY PROGRESS
 
Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress’ service area covers approximately 32,000 square miles and supplies electric service to approximately 1.51.6 million residential, commercial and industrial customers. For information about Duke Energy Progress’ generating facilities, see Item 2, “Properties.” Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.

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Substantially all of Duke Energy Progress’ operations are regulated and qualify for regulatory accounting. Duke Energy Progress operates one reportable business segment, Electric Utilities and Infrastructure. For additional information regarding this business segment, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”
DUKE ENERGY FLORIDA
 
Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida’s service area covers approximately 13,000 square miles and supplies electric service to approximately 1.8 million residential, commercial and industrial customers. For information about Duke Energy Florida’s generating facilities, see Item 2, “Properties.” Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC.
Substantially all of Duke Energy Florida’s operations are regulated and qualify for regulatory accounting. Duke Energy Florida operates one reportable business segment, Electric Utilities and Infrastructure. For additional information regarding this business segment, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”



BUSINESS


DUKE ENERGY OHIO
 
Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, in the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio also conducts competitive auctions for retail electricity supply in Ohio whereby recovery of the energy price is from retail customers. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky, Inc. (Duke Energy Kentucky).Kentucky. References herein to Duke Energy Ohio include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the PUCO, KPSC, PHMSA and FERC.
Duke Energy Ohio’s service area covers approximately 3,000 square miles and supplies electric service to approximately 850,000860,000 residential, commercial and industrial customers and provides transmission and distribution services for natural gas to approximately 529,000538,000 customers. For information about Duke Energy Ohio's generating facilities, see Item 2, “Properties.”
KO Transmission, a wholly owned subsidiary of Duke Energy Ohio, is an interstate pipeline company engaged in the business of transporting natural gas and is subject to the rules and regulations of FERC. KO Transmission's 90-mile pipeline supplies natural gas to Duke Energy Ohio and interconnects with the Columbia Gulf Transmission pipeline and Tennessee Gas Pipeline. An approximately 70-mile portion of KO Transmission's pipeline facilities is co-owned by Columbia Gas Transmission Corporation.
On April 2, 2015, Duke Energy completed the sale of its nonregulated Midwest generation business, which sold power into wholesale energy markets, to a subsidiary of Dynegy. For further information about the sale of the Midwest Generation business, refer to Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions."
Substantially all of Duke Energy Ohio's operations that remain after the saleare regulated and qualify for regulatory accounting.
Business Segments
Duke Energy Ohio has two reportable operating segments, Electric Utilities and Infrastructure and Gas Utilities and Infrastructure. For additional information on these business segments, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”
DUKE ENERGY INDIANA
 
Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana’s service area covers 23,000 square miles and supplies electric service to 820,000840,000 residential, commercial and industrial customers. SeeFor information about Duke Energy Indiana's generating facilities, see Item 2, “Properties” for further discussion of Duke Energy Indiana’s generating facilities, transmission and distribution.“Properties.” Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC.
Substantially all of Duke Energy Indiana’s operations are regulated and qualify for regulatory accounting. Duke Energy Indiana operates one reportable business segment, Electric Utilities and Infrastructure. For additional information regarding this business segment, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”
PIEDMONT
 
Piedmont is a regulated public utility primarily engaged in the distribution of natural gas to over 1 million residential, commercial, industrial and power generation customers in portions of North Carolina, South Carolina and Tennessee, including customers served by municipalities who are wholesale customers. For information about Piedmont's natural gas distribution facilities, see Item 2, "Properties." Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC, PHMSA and FERC.
Substantially all of Piedmont’s operations are regulated and qualify for regulatory accounting. Piedmont operates one reportable business segment, Gas Utilities and Infrastructure. For additional information regarding this business segment, including financial information, see Note 3 to the Consolidated Financial Statements, “Business Segments.”

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PART I

ITEM 1A. RISK FACTORS
 
In addition to other disclosures within this Form 10-K, including "Management's Discussion and Analysis of Financial Condition and Results of Operations – Matters Impacting Future Results" for each registrant in Item 7, and other documents filed with the SEC from time to time, the following factors should be considered in evaluating Duke Energy and its subsidiaries. Such factors could affect actual results of operations and cause results to differ substantially from those currently expected or sought. Unless otherwise indicated, risk factors discussed below generally relate to risks associated with all of the Duke Energy Registrants. Risks identified at the Subsidiary Registrant level are generally applicable to Duke Energy.
Business Strategy Risks
Duke Energy’s future results could be adversely affected if it is unable to implement its business strategy.
Duke Energy’s future results of operations depend, in significant part, on the extent to which it can implement its business strategy successfully. Duke Energy's strategy, including transforming the customer experience, modernizing the energy grid, generating cleaner energy, expansion of natural gas infrastructure, modernizing the regulatory construct, digital transformation and engaging employees and stakeholders to accomplish these priorities, is subject to business, economic and competitive uncertainties and contingencies, many of which are beyond its control. As a consequence, Duke Energy may not be able to fully implement or realize the anticipated results of its strategy.



RISK FACTORS


Regulatory, Legislative and Legal Risks
The Duke Energy Registrants’ regulated utility revenues, earnings and results are dependent on state legislation and regulation that affect electric generation, electric and natural gas transmission, distribution and related activities, which may limit their ability to recover costs.
The Duke Energy Registrants’ regulated electric and natural gas utility businesses are regulated on a cost-of-service/rate-of-return basis subject to statutes and regulatory commission rules and procedures of North Carolina, South Carolina, Florida, Ohio, Tennessee, Indiana and Kentucky. If the Duke Energy Registrants’ regulated utility earnings exceed the returns established by the state utility commissions, retail electric and natural gas rates may be subject to review and possible reduction by the commissions, which may decrease the Duke Energy Registrants’ future earnings. Additionally, if regulatory bodies do not allow recovery of costs incurred in providing service, or do not do so on a timely basis, the Duke Energy Registrants’ future earnings could be negatively impacted.
If legislative and regulatory structures were to evolve in such a way that the Duke Energy Registrants’ exclusive rights to serve their regulated customers were eroded, their future earnings could be negatively impacted. Federal and state regulations, laws and other efforts designed to promote and expand the use of energy efficiency measures and distributed generation technologies, such as private solar and battery storage, in Duke Energy service territories could result in customers leaving the electric distribution system and an increase in customer net energy metering, which allows customers with private solar to receive bill credits for surplus power at the full retail amount. Over time, customer adoption of these technologies and increased energy efficiency could result in excess generation resources as well as stranded costs if Duke Energy is not able to fully recover the costs and investment in generation.
State regulators have approved various mechanisms to stabilize natural gas utility margins, including margin decoupling in North Carolina and rate stabilization in South Carolina and uncollectible natural gas cost recovery in all states.Carolina. State regulators have approved other margin stabilizing mechanisms that, for example, allow for recovery of margin losses associated with negotiated transactions designed to retain large volume customers that could use alternative fuels or that may otherwise directly access natural gas supply through their own connection to an interstate pipeline. If regulators decided to discontinue the Duke Energy Registrants' use of tariff mechanisms, it would negatively impact results of operations, financial condition and cash flows. In addition, regulatory authorities also review whether natural gas costs are prudent and can disallow the recovery of a portion of natural gas costs that the Duke Energy Registrants seek to recover from customers, which would adversely impact earnings.
The rates that the Duke Energy Registrants’ regulated utility businesses are allowed to charge are established by state utility commissions in rate case proceedings, which may limit their ability to recover costs and earn an appropriate return on investment.
The rates that the Duke Energy Registrants’ regulated utility business are allowed to charge significantly influences the results of operations, financial position and liquiditycash flows of the Duke Energy Registrants. The regulation of the rates that the regulated utility businesses charge customers is determined, in large part, by state utility commissions in rate case proceedings. Negative decisions made by these regulators, or by any court on appeal of a rate case proceeding, could have a material adverse effect on the Duke Energy Registrants’ results of operations, financial position or liquiditycash flows and affect the ability of the Duke Energy Registrants to recover costs and an appropriate return on the significant infrastructure investments being made. Duke Energy cannot predict the outcome of these rate case proceedings.
Deregulation or restructuring in the electric industry may result in increased competition and unrecovered costs that could adversely affect the Duke Energy Registrants’ financial position, results of operations or cash flows and their utility businesses.
Increased competition resulting from deregulation or restructuring legislation could have a significant adverse impact on the Duke Energy Registrants’ results of operations, financial position or cash flows. Retail competitionIf the retail jurisdictions served by the Duke Energy Registrants become subject to deregulation, the impairment of assets, loss of retail customers, lower profit margins or increased costs of capital, and the unbundlingrecovery of regulated electric servicestranded costs could have a significant adverse financial impact on the Duke Energy Registrants. Stranded costs primarily include the generation assets of the Duke Energy Registrants duewhose value in a competitive marketplace may be less than their current book value, as well as above-market purchased power commitments from QFs from whom the Duke Energy Registrants are legally obligated to purchase energy at an impairment of assets, a loss of retail customers, lower profit margins or increased costs of capital.avoided cost rate under PURPA. The Duke Energy Registrants cannot predict the extent and timing of entry by additional competitors into the electric markets. The Duke Energy Registrants cannot predict if or when they will be subject to changes in legislation or regulation, nor can they predict the impact of these changes on their financial position, results of operations, financial position or cash flows.

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PART I

The Duke Energy Registrants’ businesses are subject to extensive federal regulation and a wide variety of laws and governmental policies, including taxes, that may change over time in ways that affect operations and costs.
The Duke Energy isRegistrants are subject to regulations under a wide variety of U.S. federal and state regulations and policies. There can be no assurance that laws, regulations and policies, will not be changed in ways that result in material modifications of business models and objectives or affect returns on investment by restricting activities and products, subjecting them to escalating costs or prohibiting them outright.
On December 22, 2017, President Trump signed the Tax Cuts and Jobs Acts (the Tax Act) into law which, among other provisions, reduces the maximum federal corporate income tax rate from 35 percent to 21 percent and limits interest deductions outside of regulated utility operations effective January 1, 2018. The resulting revaluation of existing deferred tax assets and liabilities to the lower federal corporate tax rate were recognized in Duke Energy’s December 31, 2017, financial statements. Guidance issued by the SEC indicates that additional adjustments for items that were estimated may be recorded during 2018 if new information becomes available. The Tax Act also could be amended or subject to technical correction, which could change the financial impacts that were recorded at December 31, 2017, or are expected to be recorded in future periods. The FERC and state utility commissions will determine the regulatory treatment of the impacts of the Tax Act. Duke Energy’s future results of operations, financial condition and cash flows could be adversely impacted by the Tax Act, subsequent amendments or corrections, or the actions of the FERC, state utility commissions or credit rating agencies related to the Tax Act.
The Duke Energy Registrants are subject to regulationincluding by FERC, NRC, EPA and various other federal agencies as well as the North American Electric Reliability Corporation. Regulation affects almost every aspect of the Duke Energy Registrants’ businesses, including, among other things, their ability to: take fundamental business management actions; determine the terms and rates of transmission and distribution services; make acquisitions; issue equity or debt securities; engage in transactions with other subsidiaries and affiliates; and pay dividends upstream to the Duke Energy Registrants. Changes to federal regulations are continuous and ongoing. The Duke Energy Registrants cannot predict the future courseThere can be no assurance that laws, regulations and policies will not be changed in ways that result in material modifications of regulatory changes or the ultimate effect those changes will have on their businesses. However, changes in regulation can cause delays inbusiness models and objectives or affect business planningreturns on investment by restricting activities and transactions and can substantially increase the Duke Energy Registrants’ costs.products, subjecting them to escalating costs, causing delays, or prohibiting them outright.



RISK FACTORS


The Duke Energy Registrants are subject to numerous environmental laws and regulations requiring significant capital expenditures that can increase the cost of operations, and which may impact or limit business plans, or cause exposure to environmental liabilities.
The Duke Energy Registrants are subject to numerous environmental laws and regulations affecting many aspects of their present and future operations, including CCRs, air emissions, water quality, wastewater discharges, solid waste and hazardous waste. These laws and regulations can result in increased capital, operating and other costs. These laws and regulations generally require the Duke Energy Registrants to obtain and comply with a wide variety of environmental licenses, permits, inspections and other approvals. Compliance with environmental laws and regulations can require significant expenditures, including expenditures for cleanup costs and damages arising from contaminated properties. Failure to comply with environmental regulations may result in the imposition of fines, penalties and injunctive measures affecting operating assets. The steps the Duke Energy Registrants could be required to take to ensure their facilities are in compliance could be prohibitively expensive. As a result, the Duke Energy Registrants may be required to shut down or alter the operation of their facilities, which may cause the Duke Energy Registrants to incur losses. Further, the Duke Energy Registrants may not be successful in recovering capital and operating costs incurred to comply with new environmental regulations through existing regulatory rate structures and their contracts with customers. Also, the Duke Energy Registrants may not be able to obtain or maintain from time to time all required environmental regulatory approvals for their operating assets or development projects. Delays in obtaining any required environmental regulatory approvals, failure to obtain and comply with them or changes in environmental laws or regulations to more stringent compliance levels could result in additional costs of operation for existing facilities or development of new facilities being prevented, delayed or subject to additional costs. Although it is not expected that the costs to comply with current environmental regulations will have a material adverse effect on the Duke Energy Registrants’ financial position, results of operations, orfinancial position and cash flows due to regulatory cost recovery, the Duke Energy Registrants are at risk that the costs of complying with environmental regulations in the future will have such an effect.
The EPA has recently enacted or proposed new federal regulations governing the management of cooling water intake structures, wastewater and CO2 emissions. These regulations may require the Duke Energy Registrants to make additional capital expenditures and increase operating and maintenance costs.
Duke Energy Carolinas and Duke Energy Progress are subject to the terms of probation set out in judgments of the United States District Court for the Eastern District of North Carolina on May 14, 2015. The judgments are based on events and activities that took place prior to 2015. The terms of probation require the companies to comply with certain environmental regulatory obligations related to coal ash and subject the two companies to oversight by a Court Appointed Monitor. If Duke Energy Carolinas or Duke Energy Progress failed to comply with certain coal ash-related environmental laws and regulations or otherwise violated the terms of probation, it could result in the imposition of additional penalties, including the revocation of probation and re-prosecution of the underlying violations. Although it is not expected that the companies will violate the terms of probation or that additional material penalties would occur, a significant violation of probation could have a material adverse effect on the Duke Energy Registrants’ reputation, results of operations, financial position and cash flows.
The Duke Energy Registrants' operations, capital expenditures and financial results may be affected by regulatory changes related to the impacts of global climate change.
There is continued concern, both nationally and internationally, about climate change. The EPA and state regulators may adopt and implement regulations to restrict emissions of GHGs.GHGs to address global climate change. Increased regulation of GHG emissions could impose significant additional costs on the Duke Energy Registrants' operations, their suppliers and customers. Regulatory changes could also result in generation facilities to be retired early and result in stranded costs if Duke Energy is not able to fully recover the costs and investment in generation. At this time, the effect that climate change regulation may have in the future on Duke Energy's business, financial condition or results of operations is not able to be predicted.

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PART I

Operational Risks
The Duke Energy Registrants’ results of operations may be negatively affected by overall market, economic and other conditions that are beyond their control.
Sustained downturns or sluggishness in the economy generally affect the markets in which the Duke Energy Registrants operate and negatively influence operations. Declines in demand for electricity or natural gas as a result of economic downturns in the Duke Energy Registrants’ regulated service territories will reduce overall sales and lessen cash flows, especially as industrial customers reduce production and, therefore, consumption of electricity and the use of natural gas. Although the Duke Energy Registrants’ regulated electric and natural gas businesses are subject to regulated allowable rates of return and recovery of certain costs, such as fuel and purchased natural gas costs, under periodic adjustment clauses, overall declines in electricity or natural gas sold as a result of economic downturn or recession could reduce revenues and cash flows, thereby diminishing results of operations. Additionally, prolonged economic downturns that negatively impact the Duke Energy Registrants’ results of operations and cash flows could result in future material impairment charges to write-down the carrying value of certain assets, including goodwill, to their respective fair values.
The Duke Energy Registrants also sell electricity into the spot market or other competitive power markets on a contractual basis. With respect to such transactions, the Duke Energy Registrants are not guaranteed any rate of return on their capital investments through mandated rates, and revenues and results of operations are likely to depend, in large part, upon prevailing market prices. These market prices may fluctuate substantially over relatively short periods of time and could reduce the Duke Energy Registrants’ revenues and margins, thereby diminishing results of operations.
Factors that could impact sales volumes, generation of electricity and market prices at which the Duke Energy Registrants are able to sell electricity and natural gas are as follows:
weather conditions, including abnormally mild winter or summer weather that cause lower energy or natural gas usage for heating or cooling purposes, as applicable, and periods of low rainfall that decrease the ability to operate facilities in an economical manner;
supply of and demand for energy commodities;
transmission or transportation constraints or inefficiencies that impact nonregulated energy operations;



RISK FACTORS


availability of competitively priced alternative energy sources, which are preferred by some customers over electricity produced from coal, nuclear or natural gas plants, and customer usage of energy-efficient equipment that reduces energy demand;
natural gas, crude oil and refined products production levels and prices;
ability to procure satisfactory levels of inventory, such as coal, natural gas and uranium; and
capacity and transmission service into, or out of, the Duke Energy Registrants’ markets.
Natural disasters or operational accidents may adversely affect the Duke Energy Registrants’ operating results.
Natural disasters (such as electromagnetic events or the 2011 earthquake and tsunami in Japan) or other operational accidents within the company or industry (such as the San Bruno, Californiaforest fires, earthquakes, hurricanes or natural gas transmission pipeline failure)explosions) could have direct significantor indirect impacts onto the Duke Energy Registrants as well as onor to key contractors and suppliers. Further, the generation of electricity and the transportation and storage of natural gas involve inherent operating risks that may result in accidents involving serious injury or loss of life, environmental damage or property damage. Such events could indirectly impact the Duke Energy Registrants through changes to policies, laws and regulations whose compliance costs have a significant impact on the Duke Energy Registrants’ financial position, results of operations, financial position and cash flows. In addition, if a serious operational accident were to occur, it could have a material adverse effect on the results of operations, financial position, cash flows and reputation of the Duke Energy Registrants.
The reputation and financial condition of the Duke Energy Registrants could be negatively impacted due to their obligations to comply with federal and state regulations, laws, and other legal requirements that govern the operations, assessments, storage, closure, remediation, disposal and monitoring relating to CCR, the high costs and new rate impacts associated with implementing these new CCR-related requirements and the strategies and methods necessary to implement these requirements in compliance with these legal obligations.
As a result of electricity produced for decades at coal-fired power plants, the Duke Energy Registrants manage large amounts of CCR that are primarily stored in dry storage within landfills or combined with water in other surface impoundments, all in compliance with applicable regulatory requirements. However, the potential exists for another CCR-related incident, such as the one that occurred during the 2014 Dan River Steam Station ash basin release, that could raise environmental or general public health concerns. Such a CCR-related incident could have a material adverse impact on the reputation and results of operations, financial conditionposition and cash flows of the Duke Energy Registrants.
During 2015, EPA regulations were enacted related to the management of CCR from power plants. These regulations classify CCR as nonhazardous waste under the RCRA and apply to electric generating sites with new and existing landfills, new and existing surface impoundments, structural fills and CCR piles, and establishes requirements regarding landfill design, structural integrity design and assessment criteria for surface impoundments, groundwater monitoring, protection and remedial procedures and other operational and reporting procedures for the disposal and management of CCR. In addition to the federal regulations, CCR landfills and surface impoundments will continue to be independently regulated by existing state laws, regulations and permits, as well as additional legal requirements that may be imposed in the future. These federal and state laws, regulations and other legal requirements may require or result in additional expenditures, increased operating and maintenance costs and/or result in closure of certain power generating facilities, which could affect the financial position, results of operations, financial position and cash flows of the Duke Energy Registrants. The Duke Energy Registrants intendwill continue to seek full cost recovery for expenditures through the normal ratemaking process with state and federal utility commissions, who permit recovery in rates of necessary and prudently incurred costs associated with the Duke Energy Registrants’ regulated operations, and through other wholesale contracts with terms that contemplate recovery of such costs, although there is no guarantee of full cost recovery. In addition, the timing for recovery of such costs could have a material adverse impact on Duke Energy's cash flows.

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PART I

The Duke Energy Registrants have recognized significant asset retirement obligations related to these CCR-related requirements. Closure activities began in 2015 at the four sites specified as high priority by the Coal Ash Act and at the W.S. Lee Steam Station site in South Carolina in connection with other legal requirements. Excavation at these sites involves movement of large amounts of CCR materials to off-site locations for use as structural fill, to appropriate engineered off-site or on-site lined landfills or conversion of the ash for beneficial use. At other sites, preliminary planning and closure methods have been studied and factored into the estimated retirement and management costs. The Coal Ash Act requires CCR surface impoundments in North Carolina to be closed, with the closure method and timing based on a risk ranking classification determined by legislation or state regulators. Additionally, the RCRA required closure timing depends upon meeting or continuing to meet certain criteria. As the closure and CCR management work progresses and final closure plans and corrective action measures are developed and approved at each site, the scope and complexity of work and the amount of CCR material could be greater than estimates and could, therefore, materially increase compliance expenditures and rate impacts.
The Duke Energy Registrants’ financial position, results of operations and cash flows may be negatively affected by a lack of growth or slower growth in the number of customers, or decline in customer demand or number of customers.
Growth in customer accounts and growth of customer usage each directly influence demand for electricity and natural gas and the need for additional power generation and delivery facilities. Customer growth and customer usage are affected by a number of factors outside the control of the Duke Energy Registrants, such as mandated energy efficiency measures, demand-side management goals, distributed generation resources and economic and demographic conditions, such as population changes, job and income growth, housing starts, new business formation and the overall level of economic activity.
Certain regulatory and legislative bodies have introduced or are considering requirements and/or incentives to reduce energy consumption by certain dates. Additionally, technological advances driven by federal laws mandating new levels of energy efficiency in end-use electric devices or other improvements in or applications of technology could lead to declines in per capita energy consumption.
Advances in distributed generation technologies that produce power, including fuel cells, microturbines, wind turbines and solar cells, may reduce the cost of alternative methods of producing power to a level competitive with central power station electric production utilized by the Duke Energy Registrants.



RISK FACTORS


Some or all of these factors could result in a lack of growth or decline in customer demand for electricity or number of customers and may cause the failure of the Duke Energy Registrants to fully realize anticipated benefits from significant capital investments and expenditures, which could have a material adverse effect on their financial position, results of operations, financial position and cash flows.
Furthermore, the Duke Energy Registrants currently have energy efficiency riders in place to recover the cost of energy efficiency programs in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky. Should the Duke Energy Registrants be required to invest in conservation measures that result in reduced sales from effective conservation, regulatory lag in adjusting rates for the impact of these measures could have a negative financial impact.
The Duke Energy Registrants’ operating results may fluctuate on a seasonal and quarterly basis and can be negatively affected by changes in weather conditions and severe weather, including extreme weather conditions associated with climate change.
Electric power generation and natural gas distribution are generally seasonal businesses. In most parts of the U.S., the demand for power peaks during the warmer summer months, with market prices also typically peaking at that time. In other areas, demand for power peaks during the winter. Demand for natural gas peaks during the winter months. Further, extreme weather conditions such as hurricanes, droughts, heat waves, winter storms and severe weather associated with climate change could cause these seasonal fluctuations to be more pronounced. As a result, the overall operating results of the Duke Energy Registrants’ businesses may fluctuate substantially on a seasonal and quarterly basis and thus make period-to-period comparison less relevant.
Sustained severe drought conditions could impact generation by hydroelectric plants, as well as fossil and nuclear plant operations, as these facilities use water for cooling purposes and for the operation of environmental compliance equipment. Furthermore, destruction caused by severe weather events, such as hurricanes, tornadoes, severe thunderstorms, snow and ice storms, can result in lost operating revenues due to outages, property damage, including downed transmission and distribution lines, and additional and unexpected expenses to mitigate storm damage. The cost of storm restoration efforts may not be fully recoverable through the regulatory process.
The Duke Energy Registrants’ sales may decrease if they are unable to gain adequate, reliable and affordable access to transmission assets.
The Duke Energy Registrants depend on transmission and distribution facilities owned and operated by utilities and other energy companies to deliver electricity sold to the wholesale market. The FERC’s power transmission regulations require wholesale electric transmission services to be offered on an open-access, non-discriminatory basis. If transmission is disrupted, or if transmission capacity is inadequate, the Duke Energy Registrants’ ability to sell and deliver products may be hindered.
The different regional power markets have changing regulatory structures, which could affect growth and performance in these regions. In addition, the ISOs who oversee the transmission systems in regional power markets have imposed in the past, and may impose in the future, price limitations and other mechanisms to address volatility in the power markets. These types of price limitations and other mechanisms may adversely impact the profitability of the Duke Energy Registrants’ wholesale power marketing business.

26


PART I

Duke Energy may be unable to complete necessary or desirable pipeline expansion or infrastructure development or maintenance projects, which may delay or prevent the Duke Energy Registrants from serving natural gas customers or expanding the natural gas business.
In order to serve current or new natural gas customers or expand the service to existing customers, the Duke Energy Registrants need to maintain, expand or upgrade distribution, transmission and/or storage infrastructure, including laying new pipeline and building compressor stations. Duke Energy Registrants have made significant investments in a number of pipeline development projects, which are being operated and constructed by third partythird-party joint venture partners. VariousThe Duke Energy Registrants must rely on their third-party joint venture partners for proper construction management of the projects and are dependent upon contractors for the successful and timely completion of the projects. In addition, various factors, such as the inability to obtain required approval from local, state and/or federal regulatory and governmental bodies, public opposition to projects, adverse litigation rulings, inability to obtain adequate financing, competition for labor and materials, construction delays, cost overruns and the inability to negotiate acceptable agreements relating to rights of way, construction or other material development components, may prevent or delay the completion of projects or materially increase costs. As a result, the Duke Energy Registrants may be unable to adequately serve existing natural gas customers or support customer growth or could incur higher than anticipated costs,cost of such projects, which could have a negativematerial adverse effect on the results of operations and financial impact.position of Duke Energy.
The availability of adequate interstate pipeline transportation capacity and natural gas supply may decrease.
The Duke Energy Registrants purchase almost all of their natural gas supply from interstate sources that must be transported to the applicable service territories. Interstate pipeline companies transport the natural gas to the Duke Energy Registrants' systems under firm service agreements that are designed to meet the requirements of their core markets. A significant disruption to interstate pipelines capacity or reduction in natural gas supply due to events including, but not limited to, operational failures or disruptions, hurricanes, tornadoes, floods, freeze off of natural gas wells, terrorist or cyberattacks or other acts of war or legislative or regulatory actions or requirements, including remediation related to integrity inspections, could reduce the normal interstate supply of natural gas and thereby reduce earnings. Moreover, if additional natural gas infrastructure, including, but not limited to, exploration and drilling rigs and platforms, processing and gathering systems, off-shore pipelines, interstate pipelines and storage, cannot be built at a pace that meets demand, then growth opportunities could be limited and earnings negatively impacted.
Fluctuations in commodity prices or availability may adversely affect various aspects of the Duke Energy Registrants’ operations as well as their financial condition,position, results of operations and cash flows.
The Duke Energy Registrants are exposed to the effects of market fluctuations in the price of natural gas, coal, fuel oil, nuclear fuel, electricity and other energy-related commodities as a result of their ownership of energy-related assets. Fuel costs are recovered primarily through cost-recovery clauses, subject to the approval of state utility commissions.



RISK FACTORS


Additionally, the Duke Energy Registrants are exposed to risk that counterparties will not be able to fulfill their obligations. Disruption in the delivery of fuel, including disruptions as a result of, among other things, transportation delays, weather, labor relations, force majeure events or environmental regulations affecting any of these fuel suppliers, could limit the Duke Energy Registrants' ability to operate their facilities. Should counterparties fail to perform, the Duke Energy Registrants might be forced to replace the underlying commitment at prevailing market prices possibly resulting in losses in addition to the amounts, if any, already paid to the counterparties.
Certain of the Duke Energy Registrants’ hedge agreements may result in the receipt of, or posting of, derivative collateral with counterparties, depending on the daily market-based calculation of financial exposure of the derivative position.positions. Fluctuations in commodity prices that lead to the return of collateral received and/or the posting of collateral with counterparties could negatively impact liquidity. Downgrades in the Duke Energy Registrants’ credit ratings could lead to additional collateral posting requirements. The Duke Energy Registrants continually monitor derivative positions in relation to market price activity.
Potential terrorist activities, or military or other actions, could adversely affect the Duke Energy Registrants’ businesses.
The continued threat of terrorism and the impact of retaliatory military and other action by the U.S. and its allies may lead to increased political, economic and financial market instability and volatility in prices for natural gas and oil, which may have material adverse effects in ways the Duke Energy Registrants cannot predict at this time. In addition, future acts of terrorism and possible reprisals as a consequence of action by the U.S. and its allies could be directed against companies operating in the U.S. Information technology systems, transmission and distribution and generation facilities such as nuclear plants could be potential targets of terrorist activities or harmful activities by individuals or groups. The potential for terrorism has subjected the Duke Energy Registrants’ operations to increased risks andgroups that could have a material adverse effect on theirDuke Energy Registrants' businesses. In particular, the Duke Energy Registrants may experience increased capital and operating costs to implement increased security for their information technology systems, transmission and distribution and generation facilities, including nuclear power plants under the NRC’s design basis threat requirements. These increased costs could include additional physical plant security and security personnel or additional capability following a terrorist incident.
The failure of Duke Energy information technology systems, or the failure to enhance existing information technology systems and implement new technology, could adversely affect the Duke Energy Registrants’ businesses.
Duke Energy’s operations are dependent upon the proper functioning of its internal systems, including the information technology systems that support our underlying business processes. Any significant failure or malfunction of such information technology systems may result in disruptions of our operations. In the ordinary course of business, we rely on information technology systems, including the internet and third-party hosted services, to support a variety of business processes and activities and to store sensitive data, including (i) intellectual property, (ii) proprietary business information, (iii) personally identifiable information of our customers and employees, and (iv) data with respect to invoicing and the collection of payments, accounting, procurement, and supply chain activities. Our information technology systems are dependent upon global communications and cloud service providers, as well as their respective vendors, many of whom have at some point experienced significant system failures and outages in the past and may experience such failures and outages in the future. These providers’ systems are susceptible to cybersecurity and data breaches, outages from fire, floods, power loss, telecommunications failures, break-ins and similar events. Failure to prevent or mitigate data loss from system failures or outages could materially affect the results of operations, financial position and cash flows of the Duke Energy Registrants.
In addition to maintaining our current information technology systems, Duke Energy believes the digital transformation of its business is key to driving internal efficiencies as well as providing additional capabilities to customers. Duke Energy’s information technology systems are critical to cost-effective, reliable daily operations and our ability to effectively serve our customers. We expect our customers to continue to demand more sophisticated technology-driven solutions and we must enhance or replace our information technology systems in response. This involves significant development and implementation costs to keep pace with changing technologies and customer demand. If we fail to successfully implement critical technology, or if it does not provide the anticipated benefits or meet customer demands, such failure could materially adversely affect our business strategy as well as impact the results of operations, financial position and cash flows of the Duke Energy Registrants.



RISK FACTORS


Cyberattacks and data security breaches could adversely affect the Duke Energy Registrants' businesses.
Information securityCybersecurity risks have generally increased in recent years as a result of the proliferation of new technologies and the increased sophistication, magnitude and frequency of cyberattacks and data security breaches. The utility industry requiresDuke Energy relies on the continued operation of sophisticated digital information technology systems and network infrastructure, which are part of an interconnected regional grid. Additionally, connectivity to the internet continues to increase through smart grid modernization and other operational excellence initiatives. Because of the critical nature of the infrastructure, increased connectivity to the internet and technology systems’ inherent vulnerability to disability or failures due to hacking, viruses, acts of war or terrorism or other types of data security breaches, the Duke Energy Registrants face a heightened risk of cyberattack.cyberattack from foreign or domestic sources and have been subject, and will likely continue to be subject, to attempts to gain unauthorized access to information and/or information systems or to disrupt utility operations through computer viruses and phishing attempts either directly or indirectly through its material vendors or related third parties. In the event of such an attack,a significant cybersecurity breach on either the Duke Energy Registrants or with one of our material vendors or related third parties, the Duke Energy Registrants could (i) have business operations disrupted, property damaged,including the disruption of the operation of our assets and the power grid, theft of confidential company, employee, shareholder, vendor or customer information, stolen and other privategeneral business systems and process interruption or compromise, including preventing the Duke Energy Registrants from servicing customers, collecting revenues or the recording, processing and/or reporting financial information accessed,correctly, (ii) experience substantial loss of revenues, repair and restoration costs, penalties and costs for lack of compliance with relevant regulations, implementation costs for additional security measures to avert future cyberattacks and other financial loss and (iii) be subject to increased regulation, litigation and reputational damage. While Duke Energy maintains insurance relating to cybersecurity events, such insurance is subject to a number of exclusions and may be insufficient to offset any losses, costs or damage experienced. Also, the market for cybersecurity insurance is relatively new and coverage available for cybersecurity events may evolve as the industry matures.

27


PART I

The Duke Energy Registrants are subject to standards enacted by the North American Electric Reliability Corporation and enforced by FERC regarding protection of the physical and cyber security of critical infrastructure assets required for operating North America's bulk electric system. The Duke Energy Registrants are also subject to regulations set by the Nuclear Regulatory Commission regarding the protection of digital computer and communication systems and networks required for the operation of nuclear power plants. While the Duke Energy Registrants believe they are in compliance with such standards and regulations, the Duke Energy Registrants have from time to time been, and may in the future be, found to be in violation of such standards and regulations. In addition, compliance with or changes in the applicable standards and regulations may subject the Duke Energy Registrants to higher operating costs and/or increased capital expenditures as well as substantial fines for non-compliance.
Failure to attract and retain an appropriately qualified workforce could unfavorably impact the Duke Energy Registrants’ results of operations.
Certain events, such as an aging workforce, mismatch of skill set or complement to future needs, or unavailability of contract resources may lead to operating challenges and increased costs. The challenges include lack of resources, loss of knowledge base and the lengthy time required for skill development. In this case, costs, including costs for contractors to replace employees, productivity costs and safety costs, may increase. Failure to hire and adequately train replacement employees, including the transfer of significant internal historical knowledge and expertise to new employees, or future availability and cost of contract labor may adversely affect the ability to manage and operate the business, especially considering the workforce needs associated with nuclear generation facilities and new skills required to operate a modernized, technology-enabled power grid. If the Duke Energy Registrants are unable to successfully attract and retain an appropriately qualified workforce, their financial position, results of operations, orfinancial position and cash flows could be negatively affected.
The costs of retiringdecommissioning Duke Energy Florida’s Crystal River Unit 3 could prove to be more extensive than is currently identified.
Costs to retire and decommission the plant could exceed estimates and, if not recoverable through the regulatory process, could adversely affect Duke Energy’s, Progress Energy’s and Duke Energy Florida’s financial condition, results of operations, financial position and cash flows.
Duke Energy Ohio’s and Duke Energy Indiana’s membership in an RTO presents risks that could have a material adverse effect on their results of operations, financial conditionposition and cash flows.
The rules governing the various regional power markets may change, which could affect Duke Energy Ohio’s and Duke Energy Indiana’s costs and/or revenues. To the degree Duke Energy Ohio and Duke Energy Indiana incur significant additional fees and increased costs to participate in an RTO, their results of operations may be impacted. Duke Energy Ohio and Duke Energy Indiana may be allocated a portion of the cost of transmission facilities built by others due to changes in RTO transmission rate design. Duke Energy Ohio and Duke Energy Indiana may be required to expand their transmission system according to decisions made by an RTO rather than their own internal planning process. While RTO transmission rates were initially designed to be revenue neutral, various proposals and proceedings currently taking place by the FERC may cause transmission rates to change from time to time. In addition, RTOs have been developing rules associated with the allocation and methodology of assigning costs associated with improved transmission reliability, reduced transmission congestion and firm transmission rights that may have a financial impact on the results of operations, financial position and cash flows of Duke Energy Ohio and Duke Energy Indiana.
As members of an RTO, Duke Energy Ohio and Duke Energy Indiana are subject to certain additional risks, including those associated with the allocation among RTO members, of losses caused by unreimbursed defaults of other participants in the RTO markets and those associated with complaint cases filed against an RTO that may seek refunds of revenues previously earned by RTO members.



RISK FACTORS


The Duke Energy Registrants may not recover costs incurred to begin construction on projects that are canceled.
Duke Energy’s long-term strategy requires the construction of new projects, either wholly owned or partially owned, which involve a number of risks, including construction delays, nonperformance by equipment and other third partythird-party suppliers, and increases in equipment and labor costs. To limit the risks of these construction projects, the Duke Energy Registrants enter into equipment purchase orders and construction contracts and incur engineering and design service costs in advance of receiving necessary regulatory approvals and/or siting or environmental permits. If any of these projects are canceled for any reason, including failure to receive necessary regulatory approvals and/or siting or environmental permits, significant cancellation penalties under the equipment purchase orders and construction contracts could occur. In addition, if any construction work or investments have been recorded as an asset, an impairment may need to be recorded in the event the project is canceled.
Nuclear Generation Risks
Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida may incur substantial costs and liabilities due to their ownership and operation of nuclear generating facilities.
Ownership interestinterests in and operation of nuclear stations by Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida subject them to various risks. These risks include, among other things: the potential harmful effects on the environment and human health resulting from the current or past operation of nuclear facilities and the storage, handling and disposal of radioactive materials; limitations on the amounts and types of insurance commercially available to cover losses that might arise in connection with nuclear operations; and uncertainties with respect to the technological and financial aspects of decommissioning nuclear plants at the end of their licensed lives.
Ownership and operation of nuclear generation facilities requires compliance with licensing and safety-related requirements imposed by the NRC. In the event of non-compliance, the NRC may increase regulatory oversight, impose fines or shut down a unit depending upon its assessment of the severity of the situation. Revised security and safety requirements promulgated by the NRC, which could be prompted by, among other things, events within or outside of the control of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, such as a serious nuclear incident at a facility owned by a third party, could necessitate substantial capital and other expenditures, as well as assessments to cover third-party losses. In addition, if a serious nuclear incident were to occur, it could have a material adverse effect on the results of operations, financial condition,position, cash flows and reputation of the Duke Energy Registrants.

28


PART I

Liquidity, Capital Requirements and Common Stock Risks
The Duke Energy Registrants rely on access to short-term borrowings and longer-term debt and equity markets to finance their capital requirements and support their liquidity needs. Access to those markets can be adversely affected by a number of conditions, many of which are beyond the Duke Energy Registrants’ control.
The Duke Energy Registrants’ businesses are significantly financed through issuances of debt and equity. The maturity and repayment profile of debt used to finance investments often does not correlate to cash flows from their assets. Accordingly, as a source of liquidity for capital requirements not satisfied by the cash flows from their operations and to fund investments originally financed through debt instruments with disparate maturities, the Duke Energy Registrants rely on access to short-term money markets as well as longer-term capital markets. The Subsidiary Registrants also rely on access to short-term intercompany borrowings. If the Duke Energy Registrants are not able to access debt or equity at competitive rates or at all, the ability to finance their operations and implement their strategy and business plan as scheduled could be adversely affected. An inability to access debt and equity may limit the Duke Energy Registrants’ ability to pursue improvements or acquisitions that they may otherwise rely on for future growth.
Market disruptions may increase the cost of borrowing or adversely affect the ability to access one or more financial markets. Such disruptions could include: economic downturns, the bankruptcy of an unrelated energy company, unfavorable capital market conditions, market prices for electricity and natural gas, actual or threatened terrorist attacks, or the overall health of the energy industry. The availability of credit under Duke Energy’s Master Credit Facility depends upon the ability of the banks providing commitments under the facility to provide funds when their obligations to do so arise. Systematic risk of the banking system and the financial markets could prevent a bank from meeting its obligations under the facility agreement.
Duke Energy maintains a revolving credit facility to provide backup for its commercial paper program and letters of credit to support variable rate demand tax-exempt bonds that may be put to the Duke Energy Registrant issuer at the option of the holder. The facility includes borrowing sublimits for the Duke Energy Registrants, each of whom is a party to the credit facility, and financial covenants that limit the amount of debt that can be outstanding as a percentage of the total capital for the specific entity. Failure to maintain these covenants at a particular entity could preclude Duke Energy from issuing commercial paper or the Duke Energy Registrants from issuing letters of credit or borrowing under the Master Credit Facility.
The Duke Energy Registrants must meet credit quality standards and there is no assurance they will maintain investment grade credit ratings. If the Duke Energy Registrants are unable to maintain investment grade credit ratings, they would be required under credit agreements to provide collateral in the form of letters of credit or cash, which may materially adversely affect their liquidity.
Each of the Duke Energy Registrants’ senior long-term debt issuances is currently rated investment grade by various rating agencies. The Duke Energy Registrants cannot ensure their senior long-term debt will be rated investment grade in the future.
If the rating agencies were to rate the Duke Energy Registrants below investment grade, borrowing costs would increase, perhaps significantly. In addition, the potential pool of investors and funding sources would likely decrease. Further, if the short-term debt rating were to fall, access to the commercial paper market could be significantly limited.



RISK FACTORS


A downgrade below investment grade could also require the posting of additional collateral in the form of letters of credit or cash under various credit, commodity and capacity agreements and trigger termination clauses in some interest rate derivative agreements, which would require cash payments. All of these events would likely reduce the Duke Energy Registrants’ liquidity and profitability and could have a material effect on their financial position, results of operations, orfinancial position and cash flows.
Non-compliance with debt covenants or conditions could adversely affect the Duke Energy Registrants’ ability to execute future borrowings.
The Duke Energy Registrants’ debt and credit agreements contain various financial and other covenants. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements.
Market performance and other changes may decrease the value of the NDTF investments of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, which then could require significant additional funding.
Ownership and operation of nuclear generation facilities also requires the maintenance of funded trusts that are intended to pay for the decommissioning costs of the respective nuclear power plants. The performance of the capital markets affects the values of the assets held in trust to satisfy these future obligations. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida have significant obligations in this area and hold significant assets in these trusts. These assets are subject to market fluctuations and will yield uncertain returns, which may fall below projected rates of return. Although a number of factors impact funding requirements, a decline in the market value of the assets may increase the funding requirements of the obligations for decommissioning nuclear plants. If Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are unable to successfully manage their NDTF assets, their financial condition, results of operations, financial position and cash flows could be negatively affected.

29


PART I

Poor investment performance of the Duke Energy pension plan holdings and other factors impacting pension plan costs could unfavorably impact the Duke Energy Registrants’ liquidity and results of operations.
The costs of providing non-contributory defined benefit pension plans are dependent upon a number of factors, such as the rates of return on plan assets, discount rates, the level of interest rates used to measure the required minimum funding levels of the plans, future government regulation and required or voluntary contributions made to the plans. The Subsidiary Registrants are allocated their proportionate share of the cost and obligations related to these plans. Without sustained growth in the pension investments over time to increase the value of plan assets and, depending upon the other factors impacting costs as listed above, Duke Energy could be required to fund its plans with significant amounts of cash. Such cash funding obligations, and the Subsidiary Registrants’ proportionate share of such cash funding obligations, could have a material impact on the Duke Energy Registrants’ financial position, results of operations, orfinancial position and cash flows.
Duke Energy is a holding company and depends on the cash flows from its subsidiaries to meet its financial obligations.
Because Duke Energy is a holding company with no operations or cash flows of its own, its ability to meet its financial obligations, including making interest and principal payments on outstanding indebtedness and to pay dividends on its common stock, is primarily dependent on the net income and cash flows of its subsidiaries and the ability of those subsidiaries to pay upstream dividends or to repay borrowed funds. Prior to funding Duke Energy, its subsidiaries have regulatory restrictions and financial obligations that must be satisfied. These subsidiaries are separate legal entities and have no obligation to provide Duke Energy with funds. In addition, Duke Energy may provide capital contributions or debt financing to its subsidiaries under certain circumstances, which would reduce the funds available to meet its financial obligations, including making interest and principal payments on outstanding indebtedness and to pay dividends on Duke Energy’s common stock.
ITEM 1B. UNRESOLVED STAFF COMMENTS
 
None.

30

PROPERTIES

PART I

ITEM 2. PROPERTIES
 
ELECTRIC UTILITIES AND INFRASTRUCTURE
The following table provides information related to the Electric Utilities and Infrastructure's generation stations as of December 31, 2017.2018. The MW displayed in the table below are based on summer capacity. Ownership interest in all facilities is 100 percent unless otherwise indicated.
    Owned MW
FacilityPlant TypePrimary FuelLocationCapacity
Duke Energy Carolinas    
OconeeNuclearUraniumSC2,554
McGuireNuclearUraniumNC2,316
Catawba(a)
NuclearUraniumSC445
Belews CreekFossilCoalNC2,220
MarshallFossilCoalNC2,058
J.E. Rogers FossilCoalNC1,388
Lincoln Combustion Turbine (CT)CTFossilGas/OilNC1,193
AllenFossilCoalNC1,098
Rockingham CTFossilGas/OilNC825
Buck Combined Cycle (CC)CCFossilGasNC668
Dan River CCFossilGasNC662
Mill Creek CTFossilGas/OilSC563
W.S. Lee CC(b)
 Fossil Gas SC686
W.S. LeeFossilGasSC170
W.S. Lee CTFossilGas/OilSC84
Bad CreekHydroWaterSC1,360
JocasseeHydroWaterSC780
Cowans FordHydroWaterNC324
KeoweeHydroWaterSC152
Other small facilities (25(23 plants)HydroWaterNC/SC669632
Distributed generationRenewableSolarNC3931
Total Duke Energy Carolinas   19,56820,209
    Owned MW
FacilityPlant TypePrimary FuelLocationCapacity
Duke Energy Progress    
BrunswickNuclearUraniumNC1,870
HarrisNuclearUraniumNC928932
RobinsonNuclearUraniumSC741
RoxboroFossilCoalNC2,439
Smith CCFossilGas/OilNC1,073
H.F. Lee CCFossilGas/OilNC888
Wayne County CTFossilGas/OilNC857
Smith CTFossilGas/OilNC772
Darlington CTFossilGas/OilSC664613
MayoFossilCoalNC727
L.V. Sutton CCFossilGas/OilNC607
AshevilleFossilCoalNC378
Asheville CTFossilGas/OilNC320
Weatherspoon CTFossilGas/OilNC124
L.V. Sutton CT (Black Start)FossilGas/OilNC8078
Blewett CTFossilOilNC52
WaltersHydroWaterNC112
Other small facilities (three(3 plants)HydroWaterNC115
Distributed generationRenewableSolarNC6249
Total Duke Energy Progress   12,80912,747

31

PROPERTIES

PART I

    Owned MW
FacilityPlant TypePrimary FuelLocationCapacity
Duke Energy Florida    
Citrus County CC Fossil Gas FL1,632
Crystal RiverFossilCoalFL2,1881,422
Hines CCFossilGas/OilFL2,0322,045
Bartow CCFossilGas/OilFL1,0801,104
AncloteFossilGasFL1,0131,003
Intercession City CTFossilGas/OilFL951
Osprey CCFossilGas/OilFL582
DeBary CTFossilGas/OilFL561
Tiger Bay CCFossilGas/OilFL200
Bartow CTFossilGas/OilFL168
Bayboro CTFossilOilFL171
Suwannee River CTFossilGasFL149
Higgins CTFossilGas/OilFL107
Avon Park CTFossilGas/OilFL48
University of Florida CoGen CTFossilGasFL4744
HamiltonRenewableSolarFL43
Distributed generationRenewableSolarFL8
Total Duke Energy Florida   9,30510,238
    Owned MW
FacilityPlant TypePrimary FuelLocationCapacity
Duke Energy Ohio    
East BendFossilCoalKY600
Woodsdale CTFossilGas/PropaneOH476
Beckjord Battery StorageRenewableStorageOH4
Total Duke Energy Ohio   1,080
    Owned MW
FacilityPlant TypePrimary FuelLocationCapacity
Duke Energy Indiana    
Gibson(b)(c)
FossilCoalIN2,822
Cayuga(c)(d)
FossilCoal/OilIN1,005
EdwardsportFossilCoalIN595
Madison CTFossilGasOH566
Vermillion CT(d)(e)
FossilGasIN360
Wheatland CTFossilGasIN450
Noblesville CCFossilGas/OilIN264
GallagherFossilCoalIN280
Henry County CTFossilGas/OilIN129
Cayuga CTFossilGas/OilIN80
Connersville CTFossilOilIN74
Miami Wabash CTFossilOilIN64
MarklandHydroWaterIN45
Distributed generationRenewableSolarIN10
Total Duke Energy Indiana   6,7446,606

32

PROPERTIES

PART I

   Owned MW
Totals by Type  Capacity
Total Electric Utilities  49,50650,880
Totals By Plant Type   
Nuclear  8,8548,858
Fossil  36,97238,357
Hydro  3,5573,520
Renewable  123145
Total Electric Utilities  49,50650,880
(a)Jointly owned with North Carolina Municipal Power Agency Number 1, North Carolina Electric Membership CorporationNCEMC and Piedmont Municipal Power Agency.PMPA. Duke Energy Carolinas' ownership is 19.25 percent of the facility.
(b)Jointly owned with NCEMC. Duke Energy Carolinas' ownership is 86.67 percent of the facility.
(c)Duke Energy Indiana owns and operates Gibson Station Units 1 through 4 and is a joint owner of unit 5 with Wabash Valley Power Association, Inc. (WVPA)WVPA and Indiana Municipal Power Agency. Duke Energy Indiana operates unit 5 and owns 50.05 percent.
(c)     Includes Cayuga Internal Combustion.
(d)    Jointly owned with WVPA. Duke Energy Indiana's ownership is 62.5 percent of the facility.
(d)Includes Cayuga Internal Combustion.
(e)Jointly owned with WVPA. Duke Energy Indiana's ownership is 62.50 percent of the facility.
The following table provides information related to Electric Utilities and Infrastructure's electric transmission and distribution properties as of December 31, 2017.2018.
 Duke
Duke
Duke
Duke
Duke
 Duke
Duke
Duke
Duke
Duke
Duke
Energy
Energy
Energy
Energy
Energy
Duke
Energy
Energy
Energy
Energy
Energy
Energy
Carolinas
Progress
Florida
Ohio
Indiana
Energy
Carolinas
Progress
Florida
Ohio
Indiana
Electric Transmission Lines  
Miles of 500 to 525 kilovolt (kV)1,100
600
300
200


Miles of 500 to 525 kV1,036
576
292
168


Miles of 345 kV1,700



1,000
700
1,145



421
724
Miles of 230 kV8,400
2,700
3,400
1,600

700
8,344
2,657
3,396
1,638

653
Miles of 100 to 161 kV12,300
6,800
2,500
900
700
1,400
12,509
6,830
2,565
891
821
1,402
Miles of 13 to 69 kV8,400
3,000

2,200
700
2,500
8,345
3,014
12
2,200
612
2,507
Total conductor miles of electric transmission lines31,900
13,100
6,200
4,900
2,400
5,300
31,379
13,077
6,265
4,897
1,854
5,286
Electric Distribution Lines  
Miles of overhead lines174,300
66,600
46,400
25,200
13,700
22,400
174,200
66,600
46,500
25,600
13,300
22,200
Miles of underground line102,800
37,800
29,400
20,800
5,900
8,900
106,000
38,500
30,000
22,500
6,000
9,000
Total conductor miles of electric distribution lines277,100
104,400
75,800
46,000
19,600
31,300
280,200
105,100
76,500
48,100
19,300
31,200
Number of electric transmission and distribution substations3,300
1,500
500
500
300
500
3,291
1,476
512
493
310
500
Substantially all of Electric Utilities and Infrastructure's electric plant in service is mortgaged under indentures relating to Duke Energy Carolinas’, Duke Energy Progress', Duke Energy Florida's, Duke Energy Ohio’s and Duke Energy Indiana’s various series of First Mortgage Bonds.
GAS UTILITIES AND INFRASTRUCTURE
Gas Utilities and Infrastructure owns transmission pipelines and distribution mains that are generally underground, located near public streets and highways, or on property owned by others for which Duke Energy Ohio and Piedmont have obtained the necessary legal rights to place and operate facilities on such property located within the Gas Utilities and Infrastructure service territories. The following table provides information related to Gas Utilities and Infrastructure's natural gas distribution.
 Duke
  Duke
 
Duke
Energy
 Duke
Energy
 
Energy
Ohio
Piedmont
Energy
Ohio
Piedmont
Miles of natural gas distribution and transmission pipelines33,100
7,200
25,900
33,300
7,200
26,100
Miles of natural gas service lines27,400
6,900
20,500
27,700
7,000
20,700

33

PROPERTIES

PART I

COMMERCIAL RENEWABLES
The following table provides information related to Commercial Renewables' electric generation facilities as of December 31, 2017.2018. The MW displayed in the table below are based on nameplate capacity. Ownership interest in all facilities is 100 percent unless otherwise indicated.
   Owned MW
FacilityPlant TypePrimary FuelLocationCapacity
Commercial Renewables – Wind   
Los Vientos Windpower (five sites)RenewableWindTX912
Top of the WorldRenewableWindWY200
FrontierRenewableWindOK200201
NotreesRenewableWindTX153
Campbell HillRenewableWindWY99
North AlleghenyRenewableWindPA70
Laurel Hill Wind EnergyRenewableWindPA69
OcotilloRenewableWindTX59
Kit CarsonRenewableWindCO51
Silver SageRenewableWindWY42
Happy JackRenewableWindWY29
ShirleyRenewableWindWI20
Sweetwater IV(a)
RenewableWindTX113
Sweetwater V(a)
RenewableWindTX38
Ironwood(a)
RenewableWindKS84
Cimarron II(a)
RenewableWindKS66
Mesquite Creek(a)
RenewableWindTX106
Total Renewables – Wind  2,3112,312
Commercial Renewables – Solar   
Conetoe IIRenewableSolarNC80
Seville I & IIRenewableSolarCA50
Rio Bravo I & IIRenewableSolarCA40
Wildwood I & IIRenewableSolarCA35
CaprockRenewableSolarNMNM25
Shoreham(b)
RenewableNY25
KelfordRenewableSolarNC22
HighlanderRenewableSolarCA21
DogwoodRenewableSolarNC20
Halifax AirportRenewableSolarNC20
PasquotankRenewableSolarNC20
PumpjackRenewableSolarCA20
ShawboroRenewableSolarNC20
LongboatRenewableSolarCA20
BagdadRenewableSolarAZ15
TX SolarRenewableSolarTX14
Creswell AlligoodRenewableSolarNC14
VictoryRenewableSolarCO13
Washington White PostRenewableSolarNC12
WhitakersRenewableSolarNC12
Other small solar(b)
RenewableSolarVarious123145
Total Renewables – Solar  643596
Commercial Renewables – Energy Storage
Notrees Battery StorageRenewableTX36
Total Renewables – Energy Storage36
Total Commercial Renewables  2,9072,991
(a)
(a)Commercial Renewables owns 47 percent of Sweetwater IV and V and 50 percent of Ironwood, Cimarron II and Mesquite Creek.
(b)Shoreham and certain projects included in Other small solar are in tax-equity structures where investors have differing interests in the project's economic attributes. 100 percent of the tax-equity project's capacity is included in the table above.


PROPERTIES


OTHER
Duke Energy owns approximately 8 million square feet and leases approximately 2 million square feet of corporate, regional and district office space spread throughout its service territories.

34


PART I

ITEM 3. LEGAL PROCEEDINGS
 
For information regarding legal proceedings, including regulatory and environmental matters, see Note 4, “Regulatory Matters,” and Note 5, “Commitments and Contingencies,” to the Consolidated Financial Statements.
MTBE Litigation
On June 19, 2014, the Commonwealth of Pennsylvania filed suit against, among others, Duke Energy Merchants, alleging contamination of “waterswaters of the state”state by MTBE from leaking gasoline storage tanks. MTBE is a gasoline additive intended to increase the oxygen level in gasoline and make it burn cleaner. The lawsuit was moved to federal court and consolidated into an existing multidistrict litigation docket of pending MTBE cases. This suit was settled for an immaterial amount in December 2017.2017 and dismissed in January 2018.
In December 2017, the state of Maryland filed a lawsuit in Baltimore City Circuit Court against Duke Energy Merchants and other defendants alleging contamination of its water supplies from MTBE. Discovery is underway.The case was removed to the U.S. District Court in Baltimore. Duke Energy cannot predict the outcome of this matter.
ITEM 4. MINE SAFETY DISCLOSURES
 
This is not applicable for any of the Duke Energy Registrants.



35

SECURITIES INFORMATION

PART II

 
ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
 
The common stock of Duke Energy is listed and traded on the New York Stock Exchange (NYSE)NYSE (ticker symbol DUK). As of January 31, 2018,2019, there were 166,271149,275 Duke Energy common stockholders of record. For information on dividends, see the "Dividend Payments" section of Management's Discussion and Analysis.
There is no market for the common stockequity securities of the Subsidiary Registrants, all of which isare directly or indirectly owned by Duke Energy.
Common Stock Data by Quarter
The following chart provides Duke Energy common stock trading prices as reported on the NYSE and information on common stock dividends declared. Stock prices represent the intraday high and low stock price.
Duke Energy expects to continue its policy of paying regular cash dividends; however, there is no assurance as to the amount of future dividends as they depend on future earnings, capital requirements and financial condition, and are subject to declaration by the Duke Energy Board of Directors.
Duke Energy’s operating subsidiaries have certain restrictions on their ability to transfer funds in the form of dividends or loans to Duke Energy. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters” for further information regarding these restrictions.
Securities Authorized for Issuance Under Equity Compensation Plans
 
See Item 12 of Part III within this Annual Report for information regarding Securities Authorized for Issuance Under Equity Compensation Plans.
Issuer Purchases of Equity Securities for Fourth Quarter 20172018
 
There were no repurchases of equity securities during the fourth quarter of 2017.

36


PART II

2018.
Stock Performance Graph
 
The following performance graph compares the cumulative total shareholder return from Duke Energy Corporation common stock, as compared with the Standard & Poor'sS&P 500 Stock Index (S&P 500) and the Philadelphia Utility Sector Index (Philadelphia Utility Index) for the past five years. The graph assumes an initial investment of $100 on December 31, 2012,2013, in Duke Energy common stock, in the S&P 500 and in the Philadelphia Utility Index and that all dividends were reinvested. The stockholder return shown below for the five-year historical period may not be indicative of future performance.
chart-b14dac52cdf95c868c9.jpg
NYSE CEO Certification
 
Duke Energy has filed the certification of its Chief Executive Officer and Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 as exhibits to this Annual Report on Form 10-K for the year ended December 31, 2017.2018.



37

SELECTED FINANCIAL DATA

PART II

ITEM 6. SELECTED FINANCIAL DATA
 
The following table provides selected financial data for the years of 20132014 through 2017.2018. See also Item 7.
(in millions, except per share amounts)2017
 2016
 2015
 2014
 2013
2018
 2017
 2016
 2015
 2014
Statement of Operations(a)
         
Statements of Operations(a)
         
Total operating revenues$23,565
 $22,743
 $22,371
 $22,509
 $21,211
$24,521
 $23,565
 $22,743
 $22,371
 $22,509
Operating income5,781
 5,341
 5,078
 4,842
 4,305
4,685
 5,625
 5,202
 4,974
 4,795
Income from continuing operations3,070
 2,578
 2,654
 2,538
 2,278
2,625
 3,070
 2,578
 2,654
 2,538
(Loss) Income from discontinued operations, net of tax(6) (408) 177
 (649) 398
Income (Loss) from discontinued operations, net of tax19
 (6) (408) 177
 (649)
Net income3,064
 2,170
 2,831
 1,889
 2,676
2,644
 3,064
 2,170
 2,831
 1,889
Net income attributable to Duke Energy Corporation3,059
 2,152
 2,816
 1,883
 2,665
2,666
 3,059
 2,152
 2,816
 1,883
Common Stock Data                  
Income from continuing operations attributable to Duke Energy Corporation common stockholders                  
Basic$4.37
 $3.71
 $3.80
 $3.58
 $3.21
$3.73
 $4.37
 $3.71
 $3.80
 $3.58
Diluted4.37
 3.71
 3.80
 3.58
 3.21
3.73
 4.37
 3.71
 3.80
 3.58
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders         
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders         
Basic$(0.01) $(0.60) $0.25
 $(0.92) $0.56
$0.03
 $(0.01) $(0.60) $0.25
 $(0.92)
Diluted(0.01) (0.60) 0.25
 (0.92) 0.55
0.03
 (0.01) (0.60) 0.25
 (0.92)
Net income attributable to Duke Energy Corporation common stockholders                  
Basic$4.36
 $3.11
 $4.05
 $2.66
 $3.77
$3.76
 $4.36
 $3.11
 $4.05
 $2.66
Diluted4.36
 3.11
 4.05
 2.66
 3.76
3.76
 4.36
 3.11
 4.05
 2.66
Dividends declared per share of common stock3.49
 3.36
 3.24
 3.15
 3.09
3.64
 3.49
 3.36
 3.24
 3.15
Balance Sheet                  
Total assets$137,914
 $132,761
 $121,156
 $120,557
 $114,779
$145,392
 $137,914
 $132,761
 $121,156
 $120,557
Long-term debt including capital leases, less current maturities49,035
 45,576
 36,842
 36,075
 37,065
51,123
 49,035
 45,576
 36,842
 36,075
(a)Significant transactions reflected in the results above include: (i) regulatory and legislative charges related to Duke Energy Progress and Duke Energy Carolinas North Carolina rate case orders and impairment charges in 2018 (see Notes 4, 11 and 12 to the Consolidated Financial Statements, "Regulatory Matters," "Goodwill and Intangible Assets" and "Investments in Unconsolidated Affiliates"); (ii) the sale of the International Disposal Group in 2016, including a loss on sale recorded within discontinued operations (see Note 2 to the Consolidated Financial Statements, “Acquisitions and Dispositions”) (ii); (iii) the acquisition of Piedmont in 2016, including losses on interest rate swaps related to the acquisition financing (see Note 2); (iii)(iv) 2014 impairment related to the disposal of the Midwest Generation Disposal Group; (iv)(v) 2014 incremental tax expense resulting from the decision to repatriate all cumulative historical undistributed foreign earnings; (v)(vi) 2014 increase in the litigation reserve related to a criminal investigation of the Dan River release; (vi) 2013 charges related to Crystal River Unit 3 and nuclear development costs; and (vii) costs to achieve mergers in all periods.release.



38

MD&ADUKE ENERGY

PART II

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
Management’s Discussion and Analysis includes financial information prepared in accordance with generally accepted accounting principles (GAAP)GAAP in the United States (U.S.)U.S., as well as certain non-GAAP financial measures such as adjusted earnings and adjusted earnings per share discussed below. Generally, a non-GAAP financial measure is a numerical measure of financial performance, financial position or cash flows that excludes (or includes) amounts that are included in (or excluded from) the most directly comparable measure calculated and presented in accordance with GAAP. The non-GAAP financial measures should be viewed as a supplement to, and not a substitute for, financial measures presented in accordance with GAAP. Non-GAAP measures as presented herein may not be comparable to similarly titled measures used by other companies.
The following combined Management’s Discussion and Analysis of Financial Condition and Results of Operations is separately filed by Duke Energy Corporation (collectively with its subsidiaries, Duke Energy) and its subsidiaries Duke Energy Carolinas, LLC (Duke Energy Carolinas), Progress Energy, Inc. (Progress Energy), Duke Energy Progress, LLC (Duke Energy Progress), Duke Energy Florida, LLC (Duke Energy Florida), Duke Energy Ohio, Inc. (Duke Energy Ohio), Duke Energy Indiana, LLC (Duke Energy Indiana) and Piedmont Natural Gas Company, Inc. (Piedmont). However, none of the registrants make any representation as to information related solely to Duke Energy or the subsidiary registrants of Duke Energy other than itself. Subsequent to Duke Energy's acquisition of Piedmont on October 3, 2016, Piedmont is a wholly owned subsidiary of Duke Energy. The financial information for Duke Energy includes results of Piedmont subsequent to October 3, 2016. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information regarding the acquisition.
DUKE ENERGY
Duke Energy is an energy company headquartered in Charlotte, North Carolina. Duke Energy operates in the U.S. primarily through its wholly owned subsidiaries, Duke Energy Carolinas, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of the Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
Management’s Discussion and Analysis should be read in conjunction with the Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Executive Overview
WithAt Duke Energy the fundamentals of our multiyear portfolio transition complete,business are strong. In 2018, we operated in 2017 asmet our near-term financial commitments and positioned the company for sustainable long-term growth. We are focused on a domestic,stable, predictable and regulated energy infrastructure business. Our long-term view provides a compelling vision to advance our strategy, leveraging scale and a focusedbusinesses portfolio to deliver a reliable dividend with 4 to 6 percent earnings per share (EPS)EPS growth during our five year planning horizon.through 2023. We have made progress advancing our long-term growth strategy that delivers value to investour customers through investments in our growth drivers of cleaner energy, grid modernization, and natural gas infrastructure, and digital transformation, while also improving customer satisfaction.achieving constructive regulatory outcomes. The strength of our balance sheet is of vital importance to the cost-effective financing of our growth strategy, and in 2018 we took proactive steps to strengthen it by issuing $2 billion of equity.

Financial Results
chart-55aa239c488750bd8a9.jpgchart-135659608c255edd923.jpg
(a)See Results of Operations below for Duke Energy’s definition of adjusted earnings and adjusted diluted earnings per share as well as a reconciliation of this non-GAAP financial measure to net income attributable to Duke Energy and net income attributable to Duke Energy per diluted share.
Duke Energy's 20172018 GAAP reported earnings were impacted by unfavorablefavorable weather, and the absence of International Energy partially offset by growth in the electric and gas businesses, including the addition of a full year's earnings contribution from Piedmontimproved residential volumes and ongoing cost management efforts.efforts, offset by charges which management believes are not indicative of ongoing performance, including regulatory and legislative items, impairments, a loss on the sale of a retired plant, and severance. See “Results of Operations” below for a detailed discussion of the consolidated results of operations as well asand a detailed discussion of financial results for each of Duke Energy’s reportable business segments, as well as Other.



39

MD&ADUKE ENERGY

PART II

20172018 Areas of Focus and Accomplishments
Duke Energy advancedOperational Excellence and Reliability. The safety of our workforce is a numbercore value. Our employees delivered strong safety results in 2018, and we maintained our industry-leading performance levels from 2016 and 2017. The reliable and safe operation of important strategic initiatives to transform its energy future with a focus on customers, employees, operations and growth. The company has responded to an environment of changing customer demands by investing inour power plants, electric distribution system and natural gas infrastructure thatis foundational to our customers, value and that provide an opportunity for sustainable growth.
Portfolio Transition. On October 3, 2016, Duke Energy completed the acquisition of Piedmont, a North Carolina corporation primarily engaged in regulated natural gas distribution to residential, commercial, industrial and power generation customers in portions of North Carolina, South Carolina and Tennessee. In December 2016, Duke Energy completed the sale of its Latin American generation businesses in two separate transactions. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information regarding these transactions.
With the acquisition of Piedmont and the sale of International Energy, Duke Energy completed a multiyear portfolio transition. The Piedmont acquisition reflects the growing importance of natural gas to the future of the energy infrastructure within the company's service territory and throughout the U.S. and establishes a strategic platform for future growth in natural gas infrastructure. The growth opportunities reflected in our 10-year strategy are expected to increase the earnings contributions from the natural gas business from 8 percent to 15 percent.
Operational Excellence. Duke Energy continues to focus on the safe and efficient operation of its generation fleet. During 2017, we delivered strong overall safety and environmental performance, with our key employee safety metric, total incident case rate,financial results and our reportable environmental events both improving from last year.credibility with stakeholders. Our nuclear and fossil/hydro generation fleets demonstrated strong performance, exceeding their respective reliability targets. Five of our six nuclear sites have achieved INPO 1 status, the industry’s highest distinction. Our electric distribution system performed well throughout the year, though we see opportunities to reduce outage durations.
Storm Response and System Restoration. 2018 was a year of intense storm activity, with Hurricane Irma, in October 2017, was oneFlorence and Hurricane Michael delivering a significant impact to our jurisdictions. Employees and utility partners worked tirelessly to restore 3 million outages during the hurricane season. Our team restored 93 percent of outages within five days during Hurricane Florence and 90 percent of outages within three days during Hurricane Michael. Our ability to effectively handle all facets of the most powerful2018 storm response efforts is a testament to our team’s extensive preparation and coordination in advance of the storm, applying lessons learned from previous storms ever to hit the southern U.S. During Hurricane Irma, over 1.3 million customers in Florida were without power., Ourand on-the-ground management throughout the restoration efforts involved coordination and communication with more than 12,000 line and fieldworkers and our team restored power to 99 percent of customers within eight days.efforts.
Customer Satisfaction. Higher J.D. Power residential customer satisfaction scores in 2017 reflect progress in the company's efforts to meet customers’ expectations. The work to improve customer satisfaction will continue, but all jurisdictions remain on track to make steady gains in the years ahead as Duke Energy continues to transform the customer experience through its Customer Connect Program.our use of customer data to better inform operational priorities and performance levels. This data-driven approach allows us to identify the investments that are the most important to the customer experience. In 2018, we instituted more proactive communications, such as text alerts during outages, in response to customer expectations. Over time our work with data analytics will result in customer satisfaction improvement as measured through J.D. Power and other surveys.
Constructive Regulatory and Legislative Outcomes. One of our long-term strategic goals is to achieve modernized regulatory constructs in all of our jurisdictions within 10 years.jurisdictions. Modernized constructs provide a number of benefits, includingwhich include improved earnings and cash flows through more timely recovery of investments, as well as stable pricing for customers. We filed several base rate cases during 2017achieved constructive regulatory outcomes in 2018 in North Carolina for both Duke Energy Carolinas and Duke Energy Progress, including the recovery of coal ash basin closure costs. The Ohio Comprehensive Settlement Agreement in 2018, approved by PUCO, was a favorable outcome that will enable the creation of a new PowerForward rider to recover a range of strategic investments, such ascosts associated with projects to modernize the grid and transform the customer service technologies, coal ash costsexperience. We are making progress in the Carolinas, smart meters, natural gas and solar generation. We continue to pursue additional legislative and regulatory outcomes, both in Washington andaddressing tax reform across our service territories,jurisdictions, targeting solutions that make sense for ourprovide benefits to customers and investors.support the long-term credit quality of our utilities.
Cost Management and Efficiencies. Duke Energy has a demonstrated track record of driving efficiencies and productivity into the business, including merger integration and continuous improvement efforts. These efficiencies will help in Duke Energy's objective to keep overall customer rates below the national average, while moderating customer bill increases over time. We are on track to exceed targeted Piedmont merger cost synergies without significant disruptions to the business or culture, integrating the Piedmont and Midwest natural gas operations, and moving to a shared services model.efforts. We continue to leverage new technology and data analytics to drive additional efficiencies across the business in response to a transforming landscape. In 2018, we established a digital transformation initiative that is tasked with identifying the best ways to use digital capabilities throughout our business.
Modernizing the Power Grid. Our grid improvement programs continue to be a key component of our growth strategy. Modernization of the electric grid, including smart meters, storm hardening, self-healing and targeted undergrounding helps to ensure the system is better prepared for severe weather, improves the system's reliability and flexibility, and provides better information and services for customers. Grid improvements enable successful storm response; for example, in the Carolinas, self-healing grid technologies rerouted power from damaged lines and systems to minimize outages. In 2018, we deployed 1.6 million smart meters resulting in 4.3 million customers having access to this technology across our regulated footprint. 
Generating Cleaner Energy. We advanced efforts to generate cleaner energy, including progress on several strategic investments during 2018. Overall, we have lowered our carbon emissions by over 30 percent since 2005, consistent with our goal to reduce carbon emissions by 40 percent by 2030. Two natural gas plants came online in 2018 and construction continues on a third one. In our Commercial Renewable business, our Shoreham solar facility came online in 2018.
Expanding the Natural Gas Platform. We continue to pursue natural gas infrastructure investments. We are working diligently to construct the ACP pipeline to bring low-cost gas supply and economic development opportunities to the Mid-Atlantic. While we navigate the impacts of permitting delays and court rulings, we remain steadfast in our commitment to this backbone infrastructure for the southeast U.S. In 2018, Piedmont announced plans to construct a new liquefied natural gas facility in Robeson County North Carolina on property Piedmont already owns. This investment will help Piedmont provide a reliable gas supply to customers during peak usage periods. We expect to begin construction in the summer of 2019.
Dividend Growth. In 2017,2018, Duke Energy continued to grow the dividend payment to shareholders by approximately 4 percent. 20172018 represented the 91st92nd consecutive year Duke Energy paid a cash dividend on its common stock.



MD&ADUKE ENERGY


Duke Energy Objectives – 20182019 and Beyond
Duke Energy will continue to deliver exceptional value to customers, be an integral part of the communities in which it doeswe do business, and provide attractive returns to investors. Duke EnergyWe have an achievable, long-term strategy in place and it is committed to leadproducing tangible results, yet the way to cleaner, smarter energy solutions that customers value through a strategy focused on:
Transformation of the customer experience to meet changing customer expectations through enhanced convenience, controlindustry in which we operate is becoming more and choicemore dynamic. We are adjusting, where necessary, and accelerating our focus in energy supply and usage.
Modernization of the electric grid, including smart meters, storm hardening, self-healing and targeted undergroundingkey areas to ensure the systemcompany is better preparedwell positioned to be successful for many decades into the future. As we look ahead to 2019, our plans include:
Continuing to place the customer at the center of all that we do.
Advancing the achievement of modernized regulatory constructs across all jurisdictions, including consideration of cost recovery models that break the link between load growth and earnings.
Improving and strengthening the energy grid to provide customers with more control, convenience and communications, and make the grid more resilient to severe weather and to improve the system's reliability and flexibility, as well as to provide better information and services for customers.ever-evolving cyber threats.
Generation of cleaner energy through an increased amount ofInvesting in both natural gas renewables generation and the continued safeinfrastructure to support our growing gas system, as we replace coal units and reliable operation of nuclear plants.
Expansion of natural gas infrastructure, from midstream gas pipelines to local distribution systems.
Operational excellence through engagement with employees and being an industry leader in safety performance and efficient operations.
Stakeholder engagement to ensure the regulatory rules in the states in which Duke Energy operates benefit customers and allow Duke Energy to recover its significant investments in a timely manner while maintaining affordable rates.
Engagement with regulatory commissions to determine the regulatory treatment of the impact of the Tax Act.

40


PART II

Primary objectives toward the implementation of this strategy include:
Growth Initiatives. Growth in the Electric Utilities and Infrastructure business is expected to be supported by the investment of significant capital in the electric transmission and distribution grid, and in cleaner, more efficient generation. Duke Energy expects to invest approximately $30 billion in Electric Utilities and Infrastructure growth projects over the next five years (2018-2022), continuing its efforts to generate cleaner energy. Duke Energy intends to work constructively with regulators to evaluate the current regulatory construct and seek modernized recovery solutions, such as riders, rate decoupling and multiyear rate plans, that benefit both customers and shareholders.
Investment projects at Electric Utilities and Infrastructure currently underway that will support growth initiatives include:
Duke Energy Indiana's $1.4 billion grid modernization plan, which is aimed at improving reliability, including fewer outages and quicker restoration.
Significant investments in combined-cycle natural gas plants, including completing the $1.5 billion Citrus County plant in Florida, the $600 million W.S. Lee facility in South Carolina and the $900 million investment in the Western Carolinas Modernization Project. These investments will allow Duke Energy to replace older, less efficient coal units.
Duke Energy expects to continue to advance other cleaner energy sources within its regulated electric jurisdictions, including hydro, wind, solar and combined heat and power projects, increasing the flexibility of the system and allowing Duke Energy to continue lowering carbon emissions.
In North Carolina, HB 589 provides a timely cost recovery mechanism for any solar investments we are able to make through a competitive market process.
In Florida, as part of the comprehensive multi-year rate settlement, we committed to invest in approximately 700 MW of solar capacity over the next five years and will be authorized to recover the cost of that investment through a single issue base rate increase. We also advanced our strategic priority of energy grid investment, establishing a multiyear recovery method for $1 billion of grid investments.
Duke Energy expects to invest around $7 billion growing its Gas Utilities and Infrastructure business over the next five years. Growth in Gas Utilities and Infrastructure will be focused on the following:
With the acquisition of Piedmont, Duke Energy now operates natural gas distribution businesses across five states. The continued integration of Piedmont, as well as additional investments in the natural gas Local Distribution Company (LDC) system, will help maintain system integrity and expand natural gas distribution to new customers.
Duke Energy will continue to grow its midstream pipeline business, underpinned by investments in the Atlantic Coast Pipeline, Sabal Trail and Constitution pipeline projects. These highly contracted pipelines will bring much needed, low-cost natural gas supplies to the eastern U.S., spurring economic growth and helping Duke Energy to grow itsour LDC customer base in the Southeast.Carolinas and Midwest.
For Commercial Renewables, Duke Energy will continueIncreasing renewables, energy storage and next-generation demand-side management into our supply/demand resource plans, in pursuit of a growth strategy that leverages these resources to pursue long-term contracted windprovide choices that our customers value.
Modernizing the way we plan and solar projects that meet its return criteria.build our generation, transmission, distribution and customer systems in a fully integrated way through Integrated System and Operations Planning to accommodate increased distributed energy resources.
Cost Management. Duke Energy has a demonstrated track record of driving efficiencies and productivity intoTransforming the business leveraging its scale through competitive procurement initiatives, deployingusing multiple levers, including digital transformationtools, to increase productivity and continuing to identify sustainable cost savings as an essential element in response to a transforming industry.
Execute on Coal Ash Management Strategy. Duke Energy will continuereinvest the company's compliance strategy with the North Carolina Coal Ash Management Act of 2014 (Coal Ash Act)proceeds into new growth opportunities, improved customer service, and Resource Conservation and Recovery Act. Duke Energy will update ash management plans to comply with the appropriate regulations and expand excavation and other compliance work at additional sites once plans and permits are approved.lower bills for customers.
Results of Operations
Non-GAAP Measures
Management evaluates financial performance in part based on non-GAAP financial measures, including adjusted earnings and adjusted diluted EPS. These items represent income from continuing operations attributable to Duke Energy, adjusted for the dollar and per share impact of special items. As discussed below, special items include certain charges and credits, which management believes are not indicative of Duke Energy's ongoing performance. Management believes the presentation of adjusted earnings and adjusted diluted EPS provides useful information to investors, as it provides them with an additional relevant comparison of Duke Energy’s performance across periods.
Management uses these non-GAAP financial measures for planning and forecasting, and for reporting financial results to the Duke Energy Board of Directors, (Board of Directors), employees, stockholders, analysts and investors. Adjusted diluted EPS is also used as a basis for employee incentive bonuses. The most directly comparable GAAP measures for adjusted earnings and adjusted diluted EPS are Net Income Attributable to Duke Energy Corporation (GAAPGAAP Reported Earnings)Earnings and DilutedGAAP Reported EPS, Attributable to Duke Energy Corporation common stockholders (GAAP Reported EPS), respectively.
Special items included in the periods presented include the following, which management believes do not reflect ongoing costs:
Costs to Achieve Mergers represents charges that result from strategic acquisitions.
Cost Savings Initiatives represent severanceRegulatory and Legislative Impacts in 2018 represents charges related to company-wide initiatives, excluding merger integration, to standardize processesthe Duke Energy Progress and systems, leverage technologyDuke Energy Carolinas North Carolina rate case orders and workforce optimization.

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PART II

Regulatory Settlements inthe repeal of the South Carolina Base Load Review Act. For 2017, representit represents charges related to the Levy nuclear project in Florida and the Mayo Zero Liquid Discharge and Sutton combustion turbine projects in North Carolina. The 2015 amount
Impairment Charges in 2018 represents charges related to the IGCC Settlement.
an impairment at Citrus County CC, a goodwill impairment at Commercial Renewables Impairmentsand an other-than-temporary impairment of an investment in Constitution Pipeline Company, LLC. For 2017 and 2016, the charges represent goodwill and other-than-temporary asset and goodwill impairments.impairments at Commercial Renewables.
Sale of Retired Plant represents the loss associated with selling Beckjord, a nonregulated generating facility in Ohio.
Impacts of the Tax Act represent estimatedrepresents amounts recognized related to the Tax CutsAct.
Severance Charges relate to companywide initiatives, excluding merger integration, to standardize processes and Jobs Act.
Ash Basin Settlementsystems, leverage technology and Penalties represent charges related to Plea Agreements and settlement agreements with regulators and other governmental entities.workforce optimization.
Adjusted earnings also include the operating results of the nonregulated Midwest generation business and Duke Energy Retail Sales (collectively, the Midwest Generation Disposal Group) and the International Disposal Group, which havehas been classified as discontinued operations. Management believes inclusion of the operating results of the International Disposal GroupsGroup within adjusted earnings and adjusted diluted EPS results in a better reflection of Duke Energy's financial performance during the period.
Duke Energy’s adjusted earnings and adjusted diluted EPS may not be comparable to similarly titled measures of another company because other companies may not calculate the measures in the same manner.



MD&ADUKE ENERGY


Reconciliation of GAAP Reported Amounts to Adjusted Amounts
The following table presents a reconciliation of adjusted earnings and adjusted diluted EPS to the most directly comparable GAAP measures.
Years Ended December 31,Years Ended December 31,
2017 2016 20152018 2017 2016
(in millions, except per share amounts)Earnings EPS Earnings EPS Earnings EPSEarnings EPS Earnings EPS Earnings EPS
GAAP Reported Earnings/EPS$3,059
 $4.36
 $2,152
 $3.11
 $2,816
 $4.05
$2,666
 $3.76
 $3,059
 $4.36
 $2,152
 $3.11
Adjustments to Reported:                      
Costs to Achieve Mergers(a)64
 0.09
 329
 0.48
 60
 0.09
65
 0.09
 64
 0.09
 329
 0.48
Regulatory Settlements98
 0.14
 
 
 58
 0.08
Commercial Renewables Impairments74
 0.11
 45
 0.07
 
 
Impacts of the Tax Act(c)
(102) (0.14) 
 
 
 
Cost Savings Initiatives
 
 57
 0.08
 88
 0.13
Ash Basin Settlement and Penalties
 
 
 
 11
 0.02
Regulatory and Legislative Impacts(b)
202
 0.29
 98
 0.14
 
 
Impairment Charges(c)
179
 0.25
 74
 0.11
 45
 0.07
Sale of Retired Plant(d)
82
 0.12
 
 
 
 
Impacts of the Tax Act(e)
20
 0.03
 (102) (0.14) 
 
Severance Charges(f)
144
 0.21
 
 
 57
 0.08
Discontinued Operations(b)(g)
6
 0.01
 661
 0.95
 119
 0.17
(19) (0.03) 6
 0.01
 661
 0.95
Adjusted Earnings/Adjusted Diluted EPS$3,199
 $4.57
 $3,244
 $4.69
 $3,152
 $4.54
$3,339
 $4.72
 $3,199
 $4.57
 $3,244
 $4.69
(a)For 2016, includes a loss on saleNet of the International Disposal Group. Represents the GAAP reported Loss from Discontinued Operations, less the International Disposal Group operating results, which are includedtax benefit of $19 million in adjusted earnings.2018, $39 million in 2017, and $194 million in 2016.
(b)For 2015, includes the impactNet of a litigation reserve related to the Midwest Generation Disposal Group. Represents (i) GAAP reported Income from Discontinued Operations, less the International Disposal Group operating resultstax benefit of $63 million in 2018 and Midwest Generation Disposal Group operating results, which are included$60 million in adjusted earnings, and (ii) a state tax charge resulting from the completion of the sale of the Midwest Generation Disposal Group but not reported as discontinued operations.2017.
(c)Net of $27 million tax benefit and $2 million Noncontrolling Interests in 2018. Net of $28 million tax benefit in 2017 and $26 million in 2016.
(d)Net of $25 million tax benefit.
(e)The Tax Act reduced the corporate income tax rate from 35 percent to 21 percent, effective January 1, 2018. As the tax change was enacted in 2017, Duke Energy iswas required to remeasure its existing deferred tax assets and liabilities at the lower rate.rate at December 31, 2017. For Duke Energy's regulated operations, where the reduction in the net accumulated deferred income tax liability is expected to be returned to customers in future rates, the remeasurement has been deferred as a regulatory liability. For 2018, the amount represents a true up of existing regulatory liabilities related to the Tax Act. See Note 23 to the Consolidated Financial Statements, "Income Taxes" for more information.
(f)Net of tax benefit of $43 million in 2018 and $35 million in 2016.
(g)For 2016, includes a loss on sale of the International Disposal Group. Represents the GAAP reported Loss from Discontinued Operations, less the International Disposal Group operating results, which are included in adjusted earnings. For 2017 and 2018, amounts reflect adjustments related to the sale of the International Disposal Group, primarily related to estimated tax expense.
Year Ended December 31, 2018, as compared to 2017
Duke Energy’s full-year 2018 GAAP Reported EPS was $3.76 compared to $4.36 for full-year 2017. In addition to the adjusted diluted EPS drivers discussed below, GAAP Reported EPS in 2018 was lower primarily due to regulatory and legislative impacts, impairment charges, severance charges and a loss on sale of a retired plant.
As discussed, management also evaluates financial performance based on adjusted earnings. Duke Energy’s full-year 2018 adjusted diluted EPS was $4.72 compared to $4.57 for full-year 2017. The increase in adjusted diluted EPS was primarily due to:
Higher regulated electric revenues due to favorable weather and higher retail sales volumes in the current year;
Positive impacts from the North Carolina rate case orders; and
Rider growth.
Partially offset by:
Higher interest expense due to higher debt outstanding and higher interest rates;
Higher depreciation and amortization expense at Electric Utilities and Infrastructure primarily due to rate base growth; and
A reduced tax benefit on holding company interest as a result of the Tax Act.
Year Ended December 31, 2017, as compared to 2016
Duke Energy’s full-year 2017 GAAP Reported EPS was $4.36 compared to $3.11 for full-year 2016. In addition to the adjusted diluted EPS drivers discussed below, GAAP Reported EPS in 2017 was higher primarily due to a $0.14 benefit per share related to the Tax Act in 2017, lower costs to achieve the Piedmont merger and a loss on sale and impairments associated with the sale of the International Disposal Group in 2016, partially offset by charges of $0.14 related to regulatory settlements in Electric Utilities and Infrastructure.
As discussed, management also evaluates financial performance based on adjusted earnings. Duke Energy’s full-year 2017 adjusted diluted EPS was $4.57 compared to $4.69 for full-year 2016. The decrease in adjusted diluted EPS was primarily due to:
Lower regulated electric revenues of $0.26 per share due to less favorable weather in the current year, including lost revenues related to Hurricane Irma;



MD&ADUKE ENERGY


The prior year operating results from the International Disposal Group, which was sold in December 2016. The 2016 operating results included a benefit from the valuation of deferred income taxes. See Note 2223 to the Consolidated Financial Statements, Income"Income Taxes," for additional information;
Higher financing costs, primarily due to the Piedmont acquisition; and

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Higher depreciation and amortization expense at Electric Utilities and Infrastructure primarily due to higher depreciable base.
Partially offset by:
Higher regulated electric revenues from increased pricing and riders driven by new rates in Duke Energy Progress South Carolina, base rate adjustments in Florida and energy efficiency rider revenues in North Carolina, as well as growth in weather-normal retail volumes;
Lower operations, maintenance and other expenses, net of amounts recoverable in rates, at Electric Utilities and Infrastructure resulting from ongoing cost efficiency efforts and lower year-to-date storm costs than the prior year; and
Additional earnings from incremental investments in Atlantic Coast Pipeline, LLC (ACP)ACP and Sabal Trail natural gas pipelines.
Year Ended December 31, 2016, as compared to 2015
Duke Energy’s full-year 2016 GAAP Reported EPS was $3.11 compared to $4.05 for full-year 2015. GAAP Reported EPS was lower primarily due to a $0.93 loss on sale of the International business, which has been presented as discontinued operations. Duke Energy also recorded $0.40 of after-tax costs to achieve the Piedmont merger in 2016, including losses on interest rate swaps related to the acquisition financing. See Note 2, "Acquisitions and Dispositions," for additional information on the Piedmont and International transactions.
As discussed, management also evaluates financial performance based on adjusted earnings. Duke Energy’s full-year 2016 adjusted diluted EPS was $4.69 compared to $4.54 for full-year 2015. The variance in adjusted diluted EPS was primarily due to:
More favorable weather in 2016 compared to 2015;
Increased retail revenues from pricing and riders, including energy efficiency programs;
Strong operations and maintenance cost control at Electric Utilities and Infrastructure; and
Piedmont’s earnings contribution subsequent to the acquisition in October 2016.
Partially offset by:
Higher storm costs at Electric Utilities and Infrastructure due to significant 2016 storms;
Higher interest expense related to additional debt outstanding; and
Higher depreciation and amortization expense at Electric Utilities and Infrastructure primarily due to higher depreciable base.
Segment ResultsSEGMENT RESULTS
The remaining information presented in this discussion of results of operations is on a GAAP basis. Management evaluates segment performance based on segment income. Segment income is defined as income from continuing operations net of income attributable to noncontrolling interests. Segment income includes intercompany revenues and expenses that are eliminated in the Consolidated Financial Statements.
Duke Energy's segment structure includes the following segments: Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables. The remainder of Duke Energy’s operations is presented as Other. See Note 3 to the Consolidated Financial Statements, “Business Segments,” for additional information on Duke Energy’s segment structure.
The Tax Cuts and Jobs Act (the Tax Act)
On December 22, 2017, President Trump signed the Tax Act into law. Among other provisions, the Tax Act lowerslowered the corporate federal income tax rate from 35 percent to 21 percent, limits interest deductions outside of regulated utility operations, requires the normalization of excess deferred taxes associated with property under the average rate assumption method as a prerequisite to qualifying for accelerated depreciation and eliminates bonus depreciation for regulated utilities, effective January 1, 2018.repealed the federal manufacturing deduction. The Tax Act also could be amended or subject to technical correction, which could changerepealed the financial impacts that were recorded at December 31, 2017, or are expectedcorporate AMT and stipulates a refund of 50 percent of remaining AMT credit carryforwards (to the extent the credits exceed regular tax for the year) for tax years 2018, 2019 and 2020 with all remaining AMT credits to be recordedrefunded in future periods. See Note 22 to the Consolidated Financial Statements, "Income Taxes," for additional information on the Tax Act. The FERC and state utility commissions will determine the regulatory treatment of the impacts of the Tax Act for the Subsidiary Registrants. Duke Energy's segments’ future results of operations, financial condition and cash flows could be adversely impacted by the Tax Act, subsequent amendments or corrections, or the actions of the FERC, state utility commissions or credit rating agencies related to the Tax Act. Duke Energy is reviewing orders to address the rate treatment of the Tax Act by each state utility commission in which the Subsidiary Registrants operate. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information. Beginning in January 2018, the Subsidiary Registrants will defer the estimated ongoing impacts of the Tax Act that are expected to be returned to customers. See the Credit Ratings section below for additional information on the impact of the Tax Act on the Duke Energy Registrants' credit ratings.

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tax year 2021.

As a result of the Tax Act, Duke Energy revalued its existing deferred tax assets and deferred tax liabilities as of December 31, 2017, to account for the estimated future impact of lower corporate tax rates on these deferred tax amounts. During the year ended December 31, 2018, Duke Energy recorded measurement period adjustments to the provisional estimate recorded as of December 31, 2017, in accordance with SAB 118. For Duke Energy's regulated operations, where the net reduction in the net accumulated deferred income tax liability is expected to be returned to customers in future rates, the remeasurement has been deferred as a regulatory liability. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information on the Tax Act's impact to the regulatory asset and liability accounts. The following table shows the expense (benefit) recorded on Duke Energy's Consolidated StatementStatements of Operations for the year ended December 31, 2017.Operations.
Impacts ofYears Ended December 31,
(in millions)
the Tax Act(a)(b)
20182017
Electric Utilities and Infrastructure(c)
$(231)$24
$(231)
Gas Utilities and Infrastructure(d)(e)
(26)1
(26)
Commercial Renewables(442)(3)(442)
Other(f)
597
(2)597
Total impact of the Tax Act(d)
$(102)
Total impact of the Tax Act(a)(b)(d)
$20
$(102)
(a)Except where noted below, amounts are included within Income Tax Expense From Continuing Operations on the Consolidated StatementStatements of Operations.
(b)See NoteNotes 4 and Note 2223 to the Consolidated Financial Statements, "Regulatory Matters" and "Income Taxes," respectively, for information about the Tax Act's impact on Duke Energy's Consolidated Balance Sheets.
(c)Amount primarily relates to the 2017 remeasurement, and true up of that remeasurement in 2018, of net deferred tax liabilities that are excluded for ratemaking purposes related to abandoned or impaired assets and certain wholesale fixed rate contracts.
(d)Includes2017 amount includes a $16 million expense recorded within Equity in earnings (losses) of unconsolidated affiliates on the Consolidated Statement of Operations.
(e)Amount2017 amount primarily relates to the remeasurement of net deferred tax liabilities that relatesrelated to equity method investments and certain wholesale fixed rate contracts.investments.
(f)Amount2017 amount primarily relates to the remeasurement of Foreign Tax Credits, federal net operating lossesNOLs and non-regulatednonregulated deferred tax assets.



MD&ASEGMENT RESULTS - ELECTRIC UTILITIES AND INFRASTRUCTURE


Electric Utilities and Infrastructure
Years Ended December 31,Years Ended December 31,
    Variance
   Variance
    Variance
   Variance
    2017 vs.
   2016 vs.






2018 vs.




2017 vs.
(in millions)2017
 2016
 2016
 2015
 2015
2018

2017

2017

2016

2016
Operating Revenues$21,331
 $21,366
 $(35) $21,521
 $(155)$22,273
 $21,331
 $942
 $21,366
 $(35)
Operating Expenses    

   

    

   

Fuel used in electric generation and purchased power6,379
 6,595
 (216) 7,308
 (713)6,917
 6,379
 538
 6,595
 (216)
Operations, maintenance and other5,196
 5,292
 (96) 5,138
 154
5,631
 5,360
 271
 5,433
 (73)
Depreciation and amortization3,010
 2,897
 113
 2,735
 162
3,523
 3,010
 513
 2,897
 113
Property and other taxes1,079
 1,021
 58
 1,013
 8
1,134
 1,079
 55
 1,021
 58
Impairment charges176
 16
 160
 101
 (85)309
 176
 133
 16
 160
Total operating expenses15,840
 15,821
 19
 16,295
 (474)17,514
 16,004
 1,510
 15,962
 42
Gains on Sales of Other Assets and Other, net6
 
 6
 5
 (5)8
 6
 2
 
 6
Operating Income5,497
 5,545
 (48) 5,231
 314
4,767
 5,333
 (566) 5,404
 (71)
Other Income and Expenses308
 303
 5
 264
 39
Other Income and Expenses, net378
 472
 (94) 444
 28
Interest Expense1,240
 1,136
 104
 1,074
 62
1,288
 1,240
 48
 1,136
 104
Income Before Income Taxes4,565
 4,712
 (147) 4,421
 291
3,857
 4,565
 (708) 4,712
 (147)
Income Tax Expense1,355
 1,672
 (317) 1,602
 70
799
 1,355
 (556) 1,672
 (317)
Segment Income$3,210
 $3,040
 $170
 $2,819
 $221
$3,058
 $3,210
 $(152) $3,040
 $170
                  
Duke Energy Carolinas Gigawatt-Hours (GWh) sales87,305
 88,545
 (1,240) 86,950
 1,595
Duke Energy Carolinas Gigawatt-hours (GWh) sales92,280
 87,305
 4,975
 88,545
 (1,240)
Duke Energy Progress GWh sales66,822
 69,049
 (2,227) 64,881
 4,168
69,331
 66,822
 2,509
 69,049
 (2,227)
Duke Energy Florida GWh sales40,591
 40,404
 187
 40,053
 351
41,559
 40,591
 968
 40,404
 187
Duke Energy Ohio GWh sales24,639
 25,163
 (524) 25,439
 (276)25,329
 24,639
 690
 25,163
 (524)
Duke Energy Indiana GWh sales33,145
 34,368
 (1,223) 33,518
 850
34,229
 33,145
 1,084
 34,368
 (1,223)
Total Electric Utilities and Infrastructure GWh sales252,502
 257,529
 (5,027) 250,841
 6,688
262,728
 252,502
 10,226
 257,529
 (5,027)
Net proportional MW capacity in operation48,828
 49,295
 (467) 50,170
 (875)49,684
 48,828
 856
 49,295
 (467)
Year Ended December 31, 2018, as compared to 2017
Electric Utilities and Infrastructure's results were impacted by higher legislative and regulatory charges compared to the prior year and higher depreciation from a growing asset base, partially offset by favorable weather in the current year, improved retail volumes, lower income tax expense and a positive net contribution from the Duke Energy Progress and Duke Energy Carolinas North Carolina rate cases. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The variance was driven primarily by:
a $577 million increase in fuel related revenues due to higher sales volumes driven primarily by favorable weather in the current year, and increases in fuel rates billed to customers, which reflects higher average fuel prices;
a $331 million increase in retail sales, net of fuel revenues, due to favorable weather in the current year;
a $236 million increase in retail pricing primarily due to the Duke Energy Progress and Duke Energy Carolinas North Carolina rate cases and Duke Energy Florida base rate adjustments related to generation assets being placed into service;
a $109 million increase in wholesale power revenues, net of fuel, primarily due to higher recovery of coal ash costs at Duke Energy Progress and Duke Energy Carolinas, partially offset by contracts that expired in the prior year at Duke Energy Indiana and customer refunds in the current year at Duke Energy Carolinas related to a FERC order on a complaint filed by PMPA;
an $82 million increase in weather-normal retail sales volumes driven by residential growth;
a $73 million net increase in retail rider revenues, primarily related to capital investment riders at Duke Energy Indiana and Duke Energy Ohio, partially offset by a net decrease in rider revenues related to the implementation of new base rates at Duke Energy Carolinas and Duke Energy Progress; and
a $49 million increase in other revenues at Duke Energy Carolinas primarily due to the recognition of previously deferred revenues associated with storm restoration costs in South Carolina and favorable transmission revenues.



44

MD&ASEGMENT RESULTS - ELECTRIC UTILITIES AND INFRASTRUCTURE


PART II
Partially offset by:

a $578 million decrease in retail and wholesale sales due to revenues subject to refund to customers associated with the lower statutory federal corporate tax rate under the Tax Act.
Operating Expenses. The variance was driven primarily by:
a $538 million increase in fuel used in electric generation and purchased power due to higher sales and higher amortization of deferred fuel expenses;
a $513 million increase in depreciation and amortization expense primarily due to higher amortization of deferred coal ash costs, additional plant in service and new depreciation rates associated with the Duke Energy Progress and Duke Energy Carolinas North Carolina rate cases;
a $271 million increase in operation, maintenance and other expense primarily due to impacts associated with the Duke Energy Progress North Carolina rate case and higher storm costs, partially offset by a FERC approved settlement refund of certain transmission costs previously billed by PJM; and
a $133 million increase in impairment charges primarily due to the impacts associated with the Duke Energy Carolinas and Duke Energy Progress North Carolina rates cases and the Duke Energy Florida Citrus County CC impairments in the current year, offset by the write-off of remaining unrecovered Levy Nuclear project costs at Duke Energy Florida in the prior year.
Other Income and Expenses, net. The decrease was primarily due to lower post in-service equity returns for projects that had been completed prior to being reflected in customer rates at Duke Energy Carolinas and lower income from non-service components of employee benefit costs in the current year at Duke Energy Progress and Duke Energy Florida. For additional information on employee benefit costs, see Note 22 to the Consolidated Financial Statements, "Employee Benefit Plans."
Interest Expense. The variance was due to higher debt outstanding in the current year, partially offset by lower deferred debt costs on major projects.
Income Tax Expense. The variance was primarily due to the lower statutory federal corporate tax rate under the Tax Act, a decrease in pretax income and the impact of the Tax Act in the prior year. The ETRs for the years ended December 31, 2018, and 2017 were 20.7 percent and 29.7 percent, respectively. The decrease in the ETR was primarily due to the lower statutory federal corporate tax rate under the Tax Act and the amortization of excess deferred taxes partially offset by the impact of the Tax Act in the prior year. See the Tax Act section above for additional information.
Year Ended December 31, 2017, as Comparedcompared to 2016
Electric Utilities and Infrastructure's results were impacted by the Tax Act, growth from investments, lower operations and maintenance expense and higher weather-normal retail sales volumes, partially offset by less favorable weather, impairment charges due to regulatory settlements, increased depreciation and amortization, higher interest expense and higher property and other taxes. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The variance was driven primarily by:
a $292 million decrease in retail sales, net of fuel revenue, due to less favorable weather in the current year; and
a $235 million decrease in fuel revenues driven by lower retail sales volumes, lower fuel prices included in rates and changes in the generation mix.
Partially offset by:
a $364 million increase in rider revenues including increased revenues related to energy efficiency programs, Duke Energy Florida’s nuclear asset securitization, Midwest transmission and distribution capital investments and Duke Energy Indiana’s Edwardsport Integrated Gasification Combined Cycle (IGCC)IGCC plant, as well as an increase in retail pricing due to base rate adjustments for Duke Energy Florida’s Osprey acquisition and Hines Chillers and the Duke Energy Progress South Carolina rate case;
an $86 million increase in weather-normal sales volumes to customers; and
a $26 million increase in other revenues primarily due to favorable transmission revenues.
Operating Expenses. The variance was driven primarily by:
a $160 million increase in impairment charges primarily due to the write-off of remaining unrecovered Levy Nuclear Project costs in the current year at Duke Energy Florida and the disallowance from rate base of certain projects at the Mayo and Sutton plants in the current year at Duke Energy Progress related to the partial settlement in the North Carolina rate case;
a $113 million increase in depreciation and amortization expense primarily due to additional plant in service; and
a $58 million increase in property and other taxes primarily due to higher property taxes.



MD&ASEGMENT RESULTS - ELECTRIC UTILITIES AND INFRASTRUCTURE


Partially offset by:
a $216 million decrease in fuel expense (including purchased power) primarily due to lower retail sales and changes in the generation mix; and
a $96$73 million decrease in operation, maintenance and other expense primarily due to lower plant outage, storm restoration and labor and benefits costs partially offset by higher operational costs that are recoverable in rates.
Interest Expense. The variance was due to higher debt outstanding in the current year and Duke Energy Florida's Crystal River Unit 3 (CR3) regulatory asset debt return ending in June 2016 upon securitization.
Income Tax Expense. The variance was primarily due to a decrease in pretax income and the impact of the Tax Act. The effective tax rates for the years ended December 31, 2017, and 2016 were 29.7 percent and 35.5 percent, respectively. The decrease in the effective tax rate was primarily due to the impact of the Tax Act. See the Tax Cuts and Jobs Act section above for additional information on the Tax Act.
Year Ended December 31, 2016, as Compared to 2015
Electric Utilities and Infrastructure's higher earnings were primarily due to increased pricing and rider revenues, favorable weather, a prior year impairment charge associated with the 2015 Edwardsport IGCC settlement and an increase in wholesale power margins. These impacts were partially offset by increased depreciation and amortization expense, higher interest expense and higher operations and maintenance expense. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The variance was driven primarily by:
a $768 million decrease in fuel revenues driven by lower fuel prices included in rates.
Partially offset by:
a $414 million increase in rider revenues including increased revenues related to energy efficiency programs, the additional ownership interest in generating assets acquired from NCEMPA in the third quarter of 2015 and increased revenues related to Duke Energy Indiana’s clean coal equipment, and increased retail electric pricing primarily due to the expiration of the North Carolina cost of removal decrement rider;
a $101 million increase in retail sales, net of fuel revenue, due to favorable weather compared to the prior year; and
a $76 million increase in wholesale power revenues primarily due to additional volumes and capacity charges for customers served under long-term contracts, including the NCEMPA wholesale contract.

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PART II

Operating Expenses. The variance was driven primarily by:
a $713 million decrease in fuel expense (including purchased power and natural gas purchases for resale) primarily due to lower natural gas and coal prices, and lower volumes of coal and oil, partially offset by higher volumes of natural gas; and
an $85 million decrease in pretax impairment charges in the prior year primarily due to the 2015 Edwardsport IGCC settlement.
Partially offset by:
a $162 million increase in depreciation and amortization expense primarily due to additional plant in service, including the additional ownership interest in generating assets acquired from NCEMPA, as well as the expiration of the North Carolina cost of removal decrement rider; and
a $154 million increase in operations and maintenance expense primarily due to higher environmental and operational costs that are recoverable in rates, increased employee benefit costs, and higher storm restoration costs, partially offset by lower costs due to effective cost control efforts.
Other Income and Expenses. The variance was primarily driven by higher AFUDC equity.
Interest Expense. The variance was due to higher debt outstanding in the current year.
Income Tax Expense. The variance was primarily due to an increase in pretax income. The effective tax rates for the years ended December 31, 2016, and 2015 were 35.5 percent and 36.2 percent, respectively.information.
Matters Impacting Future Electric Utilities and Infrastructure Results
An order from regulatory authorities disallowing recovery of costs related to closure of ash impoundments could have an adverse impact on Electric Utilities and Infrastructure's financial position, results of operations and cash flows. See Note 4 and Note 9 to the Consolidated Financial Statements, “Regulatory Matters” and "Asset Retirement Obligations," respectively, for additional information.
On May 18, 2016, the North Carolina Department of Environmental Quality (NCDEQ)NCDEQ issued proposed risk classifications for all coal ash surface impoundments in North Carolina. All ash impoundments not previously designated as high priority by the North Carolina Coal Ash Management Act of 2014 (Coal Ash Act) were designated as intermediate risk. Certain impoundments classified as intermediate risk, however, may be reassessed in the futurewere eligible for reassessment as low risk pursuant to legislation enacted on July 14, 2016. Electric UtilitiesOn November 14, 2018, NCDEQ issued final low-risk classifications for these impoundments, indicating that Duke Energy Carolinas and Infrastructure's estimated asset retirement obligations (AROs) related toDuke Energy Progress have satisfied the closure of North Carolina ash impoundments are based uponpermanent replacement water supply and certain dam improvement requirements set out in the mandated closure method or a probability weighting of potential closure methods for the impoundments that may be reassessed to low risk.Coal Ash Management Act. As the final risk ranking classifications in North Carolina are delineated, final closure plans and corrective action measures are developed and approved for each site, the closure work progresses and the closure method scope and remedial action methods are determined, the complexity of work and the amount of coal combustion material could be different than originally estimated and, therefore, could materially impact Electric Utilities and Infrastructure's results of operations, financial position.position and cash flows. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations," for additional information.
Duke Energy is a party to multiple lawsuits and could be subject to fines and other penalties related to operations at certain North Carolina facilities with ash basins. In addition, the orders issued in the Duke Energy Carolinas and Duke Energy Progress North Carolinas rate cases supporting recovery of past coal ash remediation costs have been appealed by various parties. The outcome of these appeals, lawsuits and potential fines and penalties could have an adverse impact on Electric Utilities and Infrastructure's financial position, results of operations, financial position, and cash flows. See NoteNotes 4 and 5 to the Consolidated Financial Statements, "Regulatory Matters" and “Commitments and Contingencies,” respectively, for additional information.
On June 22, 2018, Duke Energy Carolinas received an order from the NCUC, which denied the Grid Rider Stipulation and deferral treatment of grid improvement costs. Duke Energy Carolinas may petition for deferral of grid modernization costs outside of a general rate case proceeding if it can show financial hardship or a stipulation that includes greater consensus among intervening parties on costs being classified as grid modernization. While Duke Energy Progress did not request recovery of these costs in its most recent case with the NCUC, Duke Energy Progress may request recovery of certain grid modernization costs in future regulatory proceedings. Electric Utilities and Infrastructure's results of operations, financial position and cash flows could be adversely impacted if grid modernization costs are not ultimately approved for recovery and/or deferral treatment. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
InDuring the fourth quarterlast half of 2016,2018, Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida’s service territories were impacted by several named storms. Hurricane MatthewFlorence, Hurricane Michael and Winter Storm Diego caused historic flooding, extensive damage and widespread power outages withinto the service territories of Duke Energy Carolinas and Duke Energy Progress. Duke Energy Florida’s service territory was also impacted by Hurricane Michael, a Category 4 hurricane and the most powerful storm to hit the Florida Panhandle in recorded history. A significant portion of the incremental operation and maintenance expenses related to these storms have been deferred. On December 21, 2018, Duke Energy Carolinas and Duke Energy Progress service territory.filed with the NCUC petitions for approval to defer the incremental storm costs incurred to a regulatory asset for recovery in the next base rate case. Duke Energy Progress filed a petitionsimilar request with the North Carolina Utilities Commission (NCUC) requesting an accounting order to defer incremental operationPSCSC on January 11, 2019, which also included a request for the continuation of prior deferrals requested for other storms, and maintenance and capital costs incurred in response to Hurricane Matthew and other significant 2016 storms. The NCUC will address this request inon January 30, 2019, the PSCSC issued a directive approving the deferral request. Duke Energy Progress' currently pending rate case. A finalFlorida anticipates filing a petition in the first half of 2019 with the FPSC to recover incremental storm costs consistent with the provisions in its 2017 Settlement. An order from the NCUC that disallowsregulatory authorities disallowing the deferral and future recovery of all or a significant portion of the incremental storm restoration costs incurred could result inhave an adverse impact on Electric Utilities and Infrastructure's financial position, results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information.
Appeals of recently approved rate cases for Duke Energy Carolinas and Duke Energy Progress are pending at the North Carolina Supreme Court. The North Carolina Attorney General and various intervenors primarily dispute the allowance of recovery of coal ash costs from customers, which was approved by the NCUC. The outcome of these appeals could have an adverse impact to Electric Utilities and Infrastructure's results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
On February 6, 2018, the FPSC approved a stipulation that would apply tax savings resulting from the Tax Act toward storm costs effective January 2018 in lieu of implementing a storm surcharge. On May 31, 2018, Duke Energy Florida filed for recovery of the storm costs. Storm costs are currently expected to be fully recovered by approximately mid-2021. The commission has several rate cases pending. Duke Energy Kentucky filedscheduled the hearing to begin on May 21, 2019. An order disallowing recovery of these costs could have an electric rate case with the Kentucky Public Service Commission (KPSC)adverse impact on September 1, 2017, to recover costs of capital investments in generation, transmission and distribution systems and to recover other incremental expenses since its previous rate case. Duke Energy Carolinas and Duke Energy Progress filed general rate cases with the NCUC on August 25, 2017, and June 1, 2017, respectively, to recover costs of complying with Coal Combustion Residuals (CCR) regulations and the Coal Ash Act, as well as costs of capital investments in generation, transmission and distribution systems and any increase in expenditures subsequent to previous rate cases. In March 2017, Duke Energy Ohio filed an electric distribution base rate case application and supporting testimony with the Public Utility Commission of Ohio (PUCO). Electric Utilities and Infrastructure's earnings could be impacted adversely if these rate increases are delayed or denied by the KPSC, NCUC or PUCO. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information.
On August 29, 2017, Duke Energy Florida filed a 2017 Second Revisedresults of operations, financial position and Restated Settlement Agreement (2017 Settlement) with the FPSC. On November 20, 2017, the FPSC issued an order to approve the 2017 Settlement.cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information about the 2017 Settlement. In accordance with the 2017 Settlement, Duke Energy Florida will not seek recovery of any costs associated with the ongoing Westinghouse contract litigation, which is currently being appealed. See Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies,” for additional information about the litigation. An unfavorable appeals ruling on that matter could have an adverse impact on Electric Utilities and Infrastructure’s financial position, results of operations and cash flows.information.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.



46

MD&ASEGMENT RESULTS - GAS UTILITIES AND INFRASTRUCTURE

PART II

Gas Utilities and Infrastructure
Years Ended December 31,Years Ended December 31,
    Variance
   Variance
    Variance
   Variance
    2017 vs.
   2016 vs.
    2018 vs.
   2017 vs.
(in millions)2017
 2016
 2016
 2015
 2015
2018
 2017
 2017
 2016
 2016
Operating Revenues$1,836
 $901
 $935
 $541
 $360
$1,881
 $1,836
 $45
 $901
 $935
Operating Expenses    

   

    

   

Cost of natural gas632
 265
 367
 141
 124
697
 632
 65
 265
 367
Operation, maintenance and other393
 186
 207
 126
 60
421
 383
 38
 184
 199
Depreciation and amortization231
 115
 116
 79
 36
245
 231
 14
 115
 116
Property and other taxes106
 70
 36
 62
 8
107
 106
 1
 70
 36
Total operating expenses1,362

636
 726
 408
 228
1,470

1,352
 118
 634
 718
(Loss) Gains on Sales of Other Assets and Other, net
 (1) 1
 6
 (7)
 
 
 (1) 1
Operating Income474
 264
 210
 139
 125
411
 484
 (73) 266
 218
Other Income and Expenses66
 24
 42
 3
 21
Other Income and Expenses, net47
 56
 (9) 22
 34
Interest Expense105
 46
 59
 25
 21
106
 105
 1
 46
 59
Income Before Income Taxes435
 242
 193
 117
 125
352
 435
 (83) 242
 193
Income Tax Expense116
 90
 26
 44
 46
78
 116
 (38) 90
 26
Segment Income$319
 $152
 $167
 $73
 $79
$274
 $319
 $(45) $152
 $167
                  
Piedmont LDC throughput (dekatherms)(a)
468,259,777
 120,908,508
 347,351,269
 
 120,908,508
557,145,128
 468,259,777
 88,885,351
 120,908,508
 347,351,269
Duke Energy Midwest LDC throughput (MCF)80,934,836
 81,870,489
 (935,653) 84,523,814
 (2,653,325)90,604,833
 80,934,836
 9,669,997
 81,870,489
 (935,653)
(a)Includes throughput subsequent to Duke Energy's acquisition of Piedmont on October 3, 2016.
Year Ended December 31, 2018, as compared to 2017
Gas Utilities and Infrastructure's results were primarily impacted by the OTTI recorded on the Constitution investment and higher operation, maintenance and other expenses, partially offset by favorable price adjustments, customer growth and other income. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The variance was driven primarily by:
a $76 million increase primarily due to higher natural gas costs passed through to customers as a result of higher volumes sold driven primarily by weather and higher natural gas prices; and
a $37 million increase primarily due to residential and commercial customer revenue, net of natural gas costs passed through to customers, due to customer growth and IMR rate adjustments and new power generation customers.
Partially offset by:
a $69 million decrease primarily due to revenues subject to refund to customers associated with the lower statutory corporate tax rate under the Tax Act.
Operating Expenses. The variance was driven primarily by:
a $65 million increase in natural gas costs primarily due to higher costs passed through to customers, as a result of a higher natural gas prices;
a $38 million increase in operations, maintenance, and other expense primarily due to increased shared services, costs to achieve merger expenses and a pension settlement charge at Piedmont in 2017; and
a $14 million increase in depreciation and amortization expense due to additional plant in service and higher amortization of software costs.
Other Income and Expenses, net. The variance was driven primarily by:
a $55 million impairment recorded for the investment in Constitution in 2018.
Partially offset by:
a $25 million increase in non-service components of employee benefit costs in 2018. For additional information on employee benefit costs, see Note 22 to the Consolidated Financial Statements, "Employee Benefit Plans"; and



MD&ASEGMENT RESULTS - GAS UTILITIES AND INFRASTRUCTURE


a $20 million increase in equity earnings from pipeline investments.
Income Tax Expense. The variance was primarily due to the lower statutory federal corporate tax rate under the Tax Act, a decrease in pretax income and the impact of the Tax Act in the prior year. The ETRs for the years ended December 31, 2018, and 2017 were 22.2 percent and 26.7 percent, respectively. The decrease in the ETR was primarily due to the lower statutory federal corporate tax rate under the Tax Act partially offset by the impact of the Tax Act in the prior year. See the Tax Act section above for additional information.
Year Ended December 31, 2017, as Comparedcompared to 2016
Gas Utilities and Infrastructure's higher results were primarily due to the inclusion of Piedmont's earnings in the current year as a result of Duke Energy's acquisition of Piedmont on October 3, 2016, as well as additional equity earnings from investments in the ACP and Sabal Trail pipelines.
Operating Revenues. The variance was driven primarily by:
an $884 million increase in operating revenues due to the inclusion of Piedmont's operating revenues beginning in October 2016; and
a $47 million increase in Piedmont's fourth quarter results due to colder weather, higher natural gas prices, Integrity Management Rider (IMR)IMR rate adjustments, customer growth and new power generation customers.
Operating Expenses. The variance was driven primarily by:
a $686 million increase in operating expenses due to the inclusion of Piedmont's operating expenses beginning in October 2016; and
a $34 million increase in Piedmont's fourth quarter results primarily due to higher natural gas costs passed through to customers due to the higher price per dekatherm of natural gas.
Other Income and Expenses.Expenses, net. The increase was driven primarily by higher equity earnings from pipeline investments.
Interest Expense. The variance was primarily due to the inclusion of Piedmont's interest expense beginning in October 2016.
Income Tax Expense. The variance was primarily due to an increase in pretax income due to the inclusion of Piedmont's earnings beginning in October 2016, partially offset by prior period true-ups.true ups. The effective tax rates for the years ended December 31, 2017, and 2016 were 26.7 percent and 37.2 percent, respectively. The decrease in the effective tax rate was primarily due to the prior period true-upstrue ups and the impact of the Tax Act. See the Tax Cuts and Jobs Act section above for additional information on the Tax Act.
Year Ended December 31, 2016, as Compared to 2015
Gas Utilities and Infrastructure's higher results were primarily due to the inclusion of Piedmont's earnings subsequent to the merger on October 3, 2016, and higher equity earnings from pipeline investments. Piedmont's earnings included in Gas Utilities and Infrastructure's results were $67 million for the year ended December 31, 2016.
Operating Revenues. The variance was driven primarily by:
a $398 million increase in operating revenues due to the inclusion of Piedmont's operating revenues beginning in October 2016,

47


PART II

Partially offset by:
a $38 million decrease in fuel revenues driven by lower natural gas prices and decreased sales volumes for Midwest operations.
Operating Expenses. The variance was driven primarily by:
a $276 million increase in operating expenses due to the inclusion of Piedmont's operating expenses beginning in October 2016.
Partially offset by:
a $38 million decrease in the cost of natural gas, primarily due to decreased volumes and lower natural gas prices for Midwest operations.
Other Income and Expenses. The increase was driven primarily by higher equity earnings from pipeline investments.
Interest Expense. The variance was primarily due to the inclusion of Piedmont's interest expenses beginning in October 2016.
Income Tax Expense. The variance was primarily due to an increase in pretax income. The effective tax rates for the years ended December 31, 2016, and 2015 were 37.2 percent and 37.6 percent, respectively.information.
Matters Impacting Future Gas Utilities and Infrastructure Results
Gas Utilities and Infrastructure has a 24 percent ownership interest in Constitution Pipeline Company, LLC (Constitution), a natural gas pipeline project slated to transport natural gas supplies to major northeastern markets. On April 22, 2016, the New York State Department of Environmental Conservation denied Constitution’s application for a necessary water quality certification for the New York portion of the Constitution pipeline. Constitution has stopped construction and discontinued capitalization of future development costs until the project's uncertainty is resolved. As a result of the permitting delays and project uncertainty, total anticipated contributions by Duke Energy can no longer be reasonably estimated. To the extent the legal and regulatory proceedings have unfavorable outcomes, or if Constitution concludes that the project is not viable or does not go forward, an impairment charge of up to the recorded investment in the project, net of salvage value and any cash and working capital returned, may be recorded. Due to the FERC’s January 2018 ruling and the resulting increase in uncertainty, Duke Energy is evaluating the potential to recognize a pretax impairment charge on its investment in Constitution during the first quarter of 2018 of up to the current carrying amount of the investment, net of salvage value and any cash and working capital returned. With the project on hold, funding of project costs has ceased until resolution of legal actions. At December 31, 2017, Duke Energy's investment in Constitution was $81 million. See Note 4 and Note 12 to the Consolidated Financial Statements, "Regulatory Matters," and "Investments in Unconsolidated Affiliates," respectively, for additional information.
Gas Utilities and Infrastructure has a 47 percent ownership interest in ACP, which is building an approximately 600-mile interstate natural gas pipeline intended to transport diverse natural gas supplies into southeastern markets. Affected states (West Virginia, Virginia and North Carolina) have issued certain necessary permits; the project remains subject to other pending federal and state approvals, which will allow full construction activities to begin. In early 2018, the FERC issued a series of Partial Notices to Proceed, which authorized the project to begin limitedcertain construction-related activities along the pipeline route. The project has a targeted in-service date of late 2019. Due to delays in obtaining the required permits to commence construction and the conditions imposed upon the project by the permits, ACP's project managerProject cost estimates the project pipeline development costs have increased fromare a range of $5.0$7.0 billion to $5.5 billion to a range of $6.0 billion to $6.5$7.8 billion, excluding financing costs. ACP expects to achieve a late 2020 in-service date for key segments of the project, while it expects a remainder to extend into 2021. Project construction activities, schedule and final costs are still subject to uncertainty due to potential additional permittingabnormal weather, work delays construction productivity(including delays due to judicial or regulatory action) and other conditions and risks that could result in potential higher project costs, and a potential delay in the targeted in-service date.dates and potential impairment charges. ACP and Duke Energy will continue to consider their options with respect to the foregoing in light of their existing contractual and legal obligations. See NoteNotes 4 and 12 to the Consolidated Financial Statements, "Regulatory Matters,Matters" and "Investments in Unconsolidated Affiliates," respectively, for additional information.
Rapidly rising interest rates without timely or adequate updates to the regulated allowed return on equity or failure to achieve the anticipated benefits of the Piedmont merger, including cost savings and growth targets, could significantly impact the estimated fair value of reporting units in Gas Utilities and Infrastructure. In the event of a significant decline in the estimated fair value of the reporting units, goodwill impairment charges could be recorded. The carrying value of goodwill within Gas Utilities and Infrastructure was approximately $1,924 million at December 31, 2017.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.



48

MD&ASEGMENT RESULTS - COMMERCIAL RENEWABLES

PART II

Commercial Renewables
Years Ended December 31,Years Ended December 31,
    Variance
   Variance
    Variance
   Variance
    2017 vs.
   2016 vs.
    2018 vs.
   2017 vs.
(in millions)2017
 2016
 2016
 2015
 2015
2018
 2017
 2017
 2016
 2016
Operating Revenues$460
 $484
 $(24) $286
 $198
$477
 $460
 $17
 $484
 $(24)
Operating Expenses    

   

    

   

Operation, maintenance and other267
 337
 (70) 197
 140
304
 267
 37
 337
 (70)
Depreciation and amortization155
 130
 25
 104
 26
155
 155
 
 130
 25
Property and other taxes33
 25
 8
 18
 7
25
 33
 (8) 25
 8
Impairment charges99
 
 99
 3
 (3)93
 99
 (6) 
 99
Total operating expenses554
 492
 62
 322
 170
577
 554
 23
 492
 62
Gains on Sales of Other Assets and Other, net1
 5
 (4) 1
 4
(Loss) Gains on Sales of Other Assets and Other, net(1) 1
 (2) 5
 (4)
Operating Loss(93) (3) (90) (35) 32
(101) (93) (8) (3) (90)
Other Income and Expenses(12) (83) 71
 2
 (85)
Other Income and Expenses, net23
 (12) 35
 (83) 71
Interest Expense87
 53
 34
 44
 9
88
 87
 1
 53
 34
Loss Before Income Taxes(192) (139) (53) (77) (62)(166) (192) 26
 (139) (53)
Income Tax Benefit(628) (160) (468) (128) (32)(147) (628) 481
 (160) (468)
Less: Loss Attributable to Noncontrolling Interests(5) (2) (3) (1) (1)(28) (5) (23) (2) (3)
Segment Income$441
 $23
 $418
 $52
 $(29)$9
 $441
 $(432) $23
 $418
                  
Renewable plant production, GWh 8,260
 7,446
 814
 5,577
 1,869
8,522
 8,260
 262
 7,446
 814
Net proportional MW capacity in operation(a)2,907
 2,892
 15
 1,943
 949
2,991
 2,907
 84
 2,892
 15
(a)Certain projects are included in tax-equity structures where investors have differing interests in the project's economic attributes. In 2018, 100 percent of the tax-equity project's capacity is included in the table above.
Year Ended December 31, 2018, as compared to 2017
Commercial Renewables' results were unfavorably impacted by the higher tax benefit in 2017 from the Tax Act. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The increase in revenues was primarily due to an increase in the number of EPC agreements at REC Solar, partially offset by unfavorable wind portfolio revenue.
Operating Expenses. The increase in operating expenses was primarily due to an increase in the number of EPC agreements at REC Solar, higher wind portfolio expenses and higher solar development costs, partially offset by lower property taxes due to non-recurring property tax payments made in the prior year and lower impairment charges.
Other Income and Expenses, net. The favorable variance in other income and expenses was primarily due to the bankruptcy court approved NAW and FES settlement agreement, which allowed retention of previously collected cash collateral under the PPAs, sale of the FES unsecured claim, impairment of certain cost investments in the prior year and lower equity losses in the current year.
Income Tax Benefit.The decrease in tax benefit in 2018 was primarily due to the one-time impact of the Tax Act in 2017 and lower statutory federal corporate tax rate under the Tax Act. See the Tax Act section above for additional information.
Loss Attributable to Noncontrolling Interests. The increase is primarily driven by the new tax-equity structures entered into during 2018.
Year Ended December 31, 2017, as Comparedcompared to 2016
Commercial Renewables' higher earnings were primarily due to the Tax Act, partially offset by pretax impairment charges. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The decrease was primarily due to lower engineering, procurement and constructionEPC revenues from REC Solar, a California-based provider of solar installations acquired by Duke Energy in 2015.Solar.
Operating Expenses. The increase was primarily due to a $99 million in pretax impairment charges in the current year2017 related to a wholly owned non-contracted wind project and other investments and higher expenses associated with new wind and solar projects, partially offset by lower operations and maintenance expense at REC Solar due to fewer projects under construction. See Notes 10 and 11 to the Consolidated Financial Statements, “Property, Plant and Equipment” and "Goodwill“Goodwill and Intangible Assets," respectively, for additional information.
Other Income and Expenses.Expenses, net. The variance was primarily due to a $71 million pretax impairment charge in the prior year2016 related to certain equity method investments. For additional information, see Note 12 to the Consolidated Financial Statements, “Investments in Unconsolidated Affiliates.”



MD&ASEGMENT RESULTS - COMMERCIAL RENEWABLES


Interest Expense. The variance was primarily due to new project financings and less capitalized interest due to fewer projects under construction.
Income Tax Benefit. The variance was primarily due to the impact of the Tax Act and higher production tax credits (PTCs),PTCs, partially offset by lower investment tax credits (ITCs).ITCs. See the Tax CutsAct section above for additional information on the Tax Act and Jobsthe impact on the effective tax rate.
Matters Impacting Future Commercial Renewables Results
Persistently low market pricing for wind resources, primarily in the Electric Reliability Council of Texas West and PJM West markets and the future expiration of tax incentives including ITCs and PTCs could result in adverse impacts to the future results of operations, financial position and cash flows of Commercial Renewables.
On September 26, 2018, Duke Energy announced it is seeking a minority investor for the commercial renewables business. Duke Energy will continue to develop projects, grow its portfolio and manage its renewables assets. Duke Energy Renewable Services, an operations and maintenance business for third-party customers, and REC Solar are not included in the potential transaction. A sale of a minority interest is dependent on a number of factors and cannot be predicted at this time.
Within this Item 7, see the Tax Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.
Other
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018
 2017
 2017
 2016
 2016
Operating Revenues$89
 $138
 $(49) $117
 $21
Operating Expenses    

   

Fuel used in electric generation and purchased power
 58
 (58) 51
 7
Operation, maintenance and other214
 46
 168
 371
 (325)
Depreciation and amortization152
 131
 21
 152
 (21)
Property and other taxes14
 14
 
 28
 (14)
Impairment charges
 7
 (7) 2
 5
Total operating expenses380
 256
 124
 604
 (348)
(Losses) Gains on Sales of Other Assets and Other, net(96) 21
 (117) 23
 (2)
Operating Loss(387) (97) (290) (464) 367
Other Income and Expenses, net73
 129
 (56) 75
 54
Interest Expense657
 574
 83
 693
 (119)
Loss Before Income Taxes(971) (542) (429) (1,082) 540
Income Tax (Benefit) Expense(282) 353
 (635) (446) 799
Less: Net Income Attributable to Noncontrolling Interests5
 10
 (5) 9
 1
Net Loss$(694) $(905) $211
 $(645) $(260)
Year Ended December 31, 2018, as compared to 2017
Other’s lower net loss was driven by prior year impacts from the Tax Act, partially offset by severance charges, loss on the sale of the retired Beckjord station, higher interest expense and prior year proceeds resulting from the settlement of the shareholder litigation related to the Progress Energy merger. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The decrease was primarily due to prior year revenues related to Duke Energy Ohio’s entitlement of capacity and energy from OVEC’s power plants. For the year ended December 31, 2018, the revenues and related expenses for OVEC are reflected in the Electric Utilities and Infrastructure segment due to the PUCO Order that approved Duke Energy to recover or credit amounts through Rider PSR. These amounts are deemed immaterial. Therefore, no prior period amounts were restated. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters" for additional information.
Operating Expenses. The increase was primarily due to severance charges related to a corporate initiative partially offset by prior year fuel expense related to OVEC, which is reflected in the Electric Utilities and Infrastructure segment for year ended December 31, 2018. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters" for additional information.
(Losses) Gains on Sales of Other Assets and Other, net. The variance was driven by the loss on sale of the retired Beckjord station, a nonregulated facility retired during 2014, including the transfer of coal ash basins and other real property and indemnification from all potential future claims related to the property, whether arising under environmental laws or otherwise.
Other Income and Expenses, net. The variance was primarily due to insurance proceeds received in the prior year resulting from settlement of the shareholder litigation related to the Progress Energy merger and lower returns on investments that fund certain employee benefit obligations.



MD&ASEGMENT RESULTS - OTHER


Interest Expense. The increase was primarily due to an increase in long-term debt as well as higher interest rates on short-term debt.
Income Tax (Benefit) Expense. The variance was primarily due to the prior year impact of the Tax Act and an increase in pretax loss. See the Tax Act section above for additional information on the Tax Act and the impact on the effective tax rate.
Year Ended December 31, 2016, as Compared to 2015
Commercial Renewables' lower earnings were primarily due to an impairment charge related to certain equity method investments in wind projects, partially offset by new wind and solar generation placed in service and improved wind production. The following is a detailed discussion of variance drivers by line item.
Operating Revenues. The variance was primarily due to a $135 million increase due to growth of REC Solar and a $66 million increase from new wind and solar generation placed in service and improved wind production.
Operating Expenses. The variance was primarily due to a $130 million increase in operating expenses due to growth of REC Solar and a $36 million increase in operating expenses due to new wind and solar generation placed in service.
Other Income and Expenses. The variance was due to a $71 million pretax impairment charge related to certain equity method investments in wind projects. See Note 12 to the Consolidated Financial Statements, "Investments in Unconsolidated Affiliates," for additional information.
Income Tax Benefit.The variance was primarily due to a decrease in pretax income and the impact of PTCs for the renewables portfolio.

49


PART II

Matters Impacting Future Commercial Renewables Results
Changes or variability in assumptions used in calculating the fair value of the Commercial Renewables reporting units for goodwill testing purposes, including but not limited to legislative actions related to tax credit extensions, long-term growth rates and discount rates could significantly impact the estimated fair value of the Commercial Renewables reporting units. In the event of a significant decline in the estimated fair value of the Commercial Renewables reporting units, goodwill or other asset impairment charges could be recorded. The carrying value of goodwill within Commercial Renewables was approximately $93 million at December 31, 2017.
Persistently low market pricing for wind resources, primarily in the Electric Reliability Council of Texas West market and the future expiration of tax incentives including ITCs and PTCs could result in adverse impacts to the future results of Commercial Renewables.
Within this Item 7, see the Tax Cuts and Jobs Act above as well as Liquidity and Capital Resources below for risks associated with the Tax Act.
Other
 Years Ended December 31,
     Variance
   Variance
     2017 vs.
   2016 vs.
(in millions)2017
 2016
 2016
 2015
 2015
Operating Revenues$138
 $117
 $21
 $135
 $(18)
Operating Expenses    

   

Fuel used in electric generation and purchased power58
 51
 7
 48
 3
Operation, maintenance and other44
 371
 (327) 188
 183
Depreciation and amortization131
 152
 (21) 135
 17
Property and other taxes14
 28
 (14) 35
 (7)
Impairment charges7
 2
 5
 3
 (1)
Total operating expenses254
 604
 (350) 409
 195
Gains on Sales of Other Assets and Other, net21
 23
 (2) 18
 5
Operating Loss(95) (464) 369
 (256) (208)
Other Income and Expenses127
 75
 52
 98
 (23)
Interest Expense574
 693
 (119) 393
 300
Loss Before Income Taxes(542) (1,082) 540
 (551) (531)
Income Tax Expense (Benefit)353
 (446) 799
 (262) (184)
Less: Income attributable to Noncontrolling Interests10
 9
 1
 10
 (1)
Net Expense$(905) $(645) $(260) $(299) $(346)
Year Ended December 31, 2017, as Comparedcompared to 2016
Other’s higher net expenseloss was driven by the Tax Act, partially offset by prior year losses on forward-starting interest rate swaps and other costs related to the Piedmont acquisition, decreased severance expenses, prior yearcharges, donations to the Duke Energy Foundation in 2016 and insurance proceeds resulting from settlement of the shareholder litigation related to the Progress Energy merger. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The increase was primarily due to higher OVEC (Ohio Valley Electric Corporation) revenues and prior year customer credits related to Piedmont merger commitments. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information.
Operating Expenses. The decrease was primarily due to lower transaction and integration costs associated with the Piedmont acquisition, prior year severance expensescharges related to cost savings initiatives, donations to the Duke Energy Foundation in 2016 as well as prior year depreciation expense and other integration costs related to the Progress Energy merger. The Duke Energy Foundation is a nonprofit organization funded by Duke Energy shareholders that makes charitable contributions to selected nonprofits and government subdivisions.
Other Income and Expenses.Expenses, net. The increase was primarily driven by insurance proceeds resulting from settlement of the shareholder litigation related to the Progress Energy merger, higher earnings from the equity method investment in NMC and increased returns on investments that fund certain employee benefit obligations.
Interest Expense. The decrease was primarily due to prior year losses on forward-starting interest rate swaps related to Piedmont pre-acquisition financing, partially offset by higher interest costs on $3.75 billion of debt issued in August 2016 to fund the acquisition. For additional information see Notes 2, 6 and 14 to the Consolidated Financial Statements, "Acquisitions and Dispositions," "Debt and Credit Facilities" and "Derivatives and Hedging," respectively.
Income Tax Benefit. The variance was primarily due to the impact of the Tax Act and a decrease in pretax loss. See the Tax Cuts and Jobs Act section above for additional information on the Tax Act and the impact on the effective tax rate.

50


PART II

Year Ended December 31, 2016, as Compared to 2015
Other’s higher net expense was driven by costs related to the Piedmont acquisition, higher charitable donations and higher interest expense related to the Piedmont acquisition financing. The following is a detailed discussion of the variance drivers by line item.
Operating Revenues. The decrease was primarily due to customer credits recorded related to Piedmont merger commitments. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information.
Operating Expenses. The increase was primarily due to transaction and integration costs associated with the Piedmont acquisition and increased donations to the Duke Energy Foundation, partially offset by a decrease in severance accruals.
Other Income and Expenses. The variance was primarily due to lower earnings from NMC, partially offset by higher returns on investments that support employee benefit obligations.
Interest Expense. The increase was primarily due to Piedmont acquisition financing, including bridge facility costs and losses on forward-starting interest rate swaps. For additional information see Notes 2 and 14 to the Consolidated Financial Statements, "Acquisitions and Dispositions" and "Derivatives and Hedging," respectively.
Income Tax Benefit. The variance was primarily due to an increase in pretax losses, partially offset by a decrease in the effective tax rate. The effective tax rates for the years ended December 31, 2016, and 2015 were 41.2 percent and 47.5 percent, respectively. The decrease in the effective tax rate was primarily due to the benefit from legal entity restructuring recorded in 2015.
Matters Impacting Future Other Results
Included in Other is Duke Energy Ohio's 9 percent ownership interest in the Ohio Valley Electric Corporation (OVEC), which owns 2,256 MW of coal-fired generation capacity. As a counterparty to an inter-company power agreement (ICPA), Duke Energy Ohio has a contractual arrangement to receive entitlements to capacity and energy from OVEC’s power plants through June 2040 commensurate with its power participation ratio, which is equivalent to Duke Energy Ohio's ownership interest. Costs, including fuel, operating expenses, fixed costs, debt amortization and interest expense, are allocated to counterparties to the ICPA, including Duke Energy Ohio, based on their power participation ratio. The value of the ICPA is subject to variability due to fluctuations in power prices and changes in OVEC’s costs of business. Deterioration in the credit quality or bankruptcy of one or more parties to the ICPA could increase the costs of OVEC. In addition, certain proposed environmental rulemaking costs could result in future increased cost allocations. For information on Duke Energy's regulatory filings related to OVEC, see Note 4 to the Consolidated Financial Statements, “Regulatory Matters.”
The retired Beckjord generating station (Beckjord), a nonregulated facility retired during 2014, is not subject to the U.S. Environmental Protection Agency (EPA) rule related to the disposal of CCR from electric utilities. However, if costs are incurred as a result of environmental regulations or to mitigate risk associated with on-site storage of coal ash, the costs could have an adverse impact on Other's financial position, results of operations and cash flows.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.
INCOME (LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX
Years Ended December 31,Years Ended December 31,
    Variance
   Variance
    Variance
   Variance
    2017 vs.
   2016 vs.
    2018 vs.
   2017 vs.
(in millions)2017
 2016
 2016
 2015
 2015
2018
 2017
 2017
 2016
 2016
(Loss) Income From Discontinued Operations, net of tax$(6) $(408) $402
 $177
 $(585)
Income (Loss) From Discontinued Operations, net of tax$19
 $(6) $25
 $(408) $402
Year Ended December 31, 2018, as compared to 2017
The variance was primarily driven by tax adjustments related to the International Disposal Groups. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information.
Year Ended December 31, 2017, as Comparedcompared to 2016
The variance was primarily driven by the prior year loss on the disposal of Duke Energy's Latin American generation business and an impairment charge related to certain assets in Central America, partially offset by a tax benefit related to historic unremitted foreign earnings and immaterial out of period tax adjustments unrelated to the International Disposal Groups.Group. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information.
Year Ended December 31, 2016, as Compared to 2015

The variance was primarily driven by the 2016 loss on the disposal of Duke Energy's Latin American generation business and an impairment charge related to certain assets in Central America, partially offset by a tax benefit related to historic unremitted foreign earnings and immaterial out of period tax adjustments unrelated to the Disposal Groups. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information.

51

MD&ASUBSIDIARY REGISTRANTS

PART II

SUBSIDIARY REGISTRANTS
As a result of the Tax Act, the Subsidiary Registrants revalued their deferred tax assets and deferred tax liabilities, as of December 31, 2017, to account for the estimated future impact of lower corporate tax rates on these deferred tax amounts. During the year ended December 31, 2018, the Subsidiary Registrants recorded measurement period adjustments to the provisional estimate recorded as of December 31, 2017, in accordance with SAB 118. For the Subsidiary RegistrantsRegistrants' regulated operations, where the net reduction in the net accumulated deferred income tax liability is expected to be returned to customers in future rates, the remeasurement has been deferred as a regulatory liability. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters" for additional information on the Tax Act's impact to the regulatory asset and liability accounts. The FERC and state utility commissions will determine the regulatory treatment of the impacts of the Tax Act for the Subsidiary Registrants. The Subsidiary Registrants’ future results of operations, financial condition and cash flows could be adversely impacted by the Tax Act, subsequent amendments or corrections, or the actions of the FERC, state utility commissions or credit rating agencies related to the Tax Act. The change in each Subsidiary Registrant's effective tax rate for the year ended December 31, 2017,2018, was primarily due to the impact of the Tax Act, unless noted below. The following table shows the expense (benefit) recorded on the Subsidiary Registrant's Consolidated StatementStatements of Operations and Comprehensive Income, for the year ended December 31, 2017, and the effective tax rate for each Subsidiary Registrant.
  Effective Tax Rate
Impacts of the Tax Act(a)(b)
  Effective Tax Rate
Impacts of Years Ended December 31, Years Ended December 31,  Years Ended December 31, 
(in millions)
the Tax Act(a)(b)
 2017
 2016
2018
2017
 2018
 2017
Duke Energy Carolinas$15
 34.9% 35.2%$1
$15
 22.1% 34.9%
Progress Energy(246)
(c) 
17.2% 33.7%25
(246)
(c) 
17.4% 17.2%
Duke Energy Progress(40)
(d) 
29.0%
(h) 
33.4%19
(40)
(d) 
19.3% 29.0%
Duke Energy Florida(226)
(c) 
6.1% 36.9%
(226)
(c) 
15.4% 6.1%
Duke Energy Ohio(23)
(e) 
23.4% 28.9%2
(23)
(e) 
19.6% 23.4%
Duke Energy Indiana55
(f) 
46.0% 37.1%
55
(f) 
24.6% 46.0%
Piedmont(2)
(d)(g) 
30.8% 38.3%
(2)
(d)(g) 
22.3% 30.8%
(a)
Except where noted below, amounts are included within Income Tax Expense From Continuing Operations or Income Tax Expense on the Consolidated StatementStatements of Operations and Comprehensive Income.
(b)See Notes 4 and 2223 to the Consolidated Financial Statements, "Regulatory Matters" and "Income Taxes," respectively, for information about the Tax Act's impact on Duke Energy's Consolidated Balance Sheets.
(c)Amount2017 amount primarily relates to the remeasurement of deferred tax liabilities that are excluded for ratemaking purposes related to abandoned assets and certain wholesale fixed rate contracts.
(d)Amount2017 amount primarily relates to the remeasurement of deferred tax liabilities of certain wholesale fixed rate contracts.
(e)Amount2017 amount primarily relates to the remeasurement of deferred tax assets that are excluded for ratemaking purposes related to a prior transfer of certain electric generating assets.
(f)Amount2017 amount primarily relates to the remeasurement of deferred tax liabilities that are excluded for ratemaking purposes related to impaired assets.
(g)Includes2017 amount includes a $16 million expense recorded within Equity in earnings (losses) of unconsolidated affiliates on the Consolidated StatementStatements of Operations and Comprehensive Income.
(h)The decrease in the effective tax rate was primarily due to the impact of the Tax Act and lower North Carolina corporate tax rates.

52


PART II

DUKE ENERGY CAROLINAS
Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Basis of Presentation
The results of operations and variance discussion for Duke Energy Carolinas is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.



MD&ADUKE ENERGY CAROLINAS


Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 Variance
2018
 2017
 Variance
Operating Revenues$7,302
 $7,322
 $(20)$7,300
 $7,302
 $(2)
Operating Expenses    

    

Fuel used in electric generation and purchased power1,822
 1,797
 25
1,821
 1,822
 (1)
Operation, maintenance and other1,961
 2,106
 (145)2,130
 2,021
 109
Depreciation and amortization1,090
 1,075
 15
1,201
 1,090
 111
Property and other taxes281
 276
 5
295
 281
 14
Impairment charges
 1
 (1)192
 
 192
Total operating expenses5,154
 5,255
 (101)5,639
 5,214
 425
Gain (Loss) on Sales of Other Assets and Other, net1
 (5) 6
(Losses) Gains on Sales of Other Assets and Other, net(1) 1
 (2)
Operating Income2,149
 2,062
 87
1,660
 2,089
 (429)
Other Income and Expenses, net139
 162
 (23)153
 199
 (46)
Interest Expense422
 424
 (2)439
 422
 17
Income Before Income Taxes1,866
 1,800
 66
1,374
 1,866
 (492)
Income Tax Expense652
 634
 18
303
 652
 (349)
Net Income$1,214
 $1,166
 $48
$1,071
 $1,214
 $(143)
The following table shows the percent changes in GWh sales and average number of customers for Duke Energy Carolinas. The below percentages for retail customer classes represent billed sales only. Total sales includes billed and unbilled retail sales and wholesale sales to incorporated municipalities and to public and private utilities and power marketers. Amounts are not weather-normalized.
Increase (Decrease) over prior year2017 20162018 2017
Residential sales(4.8)% 0.1 %11.7 % (4.8)%
General service sales(1.8)% 0.7 %4.5 % (1.8)%
Industrial sales(0.8)% (0.9)%(0.3)% (0.8)%
Wholesale power sales6.3 % 9.8 %12.5 % 6.3 %
Joint dispatch sales18.2 % (2.3)%23.1 % 18.2 %
Total sales(1.4)% 1.8 %5.7 % (1.4)%
Average number of customers1.5 % 1.4 %1.5 % 1.5 %
Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. The variance was driven primarily by:
a $179$263 million decrease in retail sales net of fuel revenues, due to less favorable weather inrevenues subject to refund to customers associated with the current year.
Partially offset by:lower statutory federal corporate tax rate under the Tax Act;
a $74$68 million increasedecrease in retail rider revenues and retail pricing primarily related to energy efficiency programs;
a $41 million increase in weather-normal sales volumes to retail customers, netthe implementation of fuel revenues;
a $30 million increase in fuel revenues primarily due to changes in generation mix partially offset by lower retail sales;new base rates; and
a $7an $8 million increasedecrease in wholesale power revenues, net of sharing and fuel, primarily due to additional volumes for customers served under long-term contracts.wholesale customer refunds in the current year related to a FERC order on a complaint filed by PMPA, partially offset by higher revenues related to recovery of coal ash costs.

Partially offset by:
53


a $169 million increase in retail sales, net of fuel revenues, due to favorable weather in the current year;
PART II
an $83 million increase in retail pricing from impacts of the North Carolina rate case;

a $49 million increase in other revenues primarily due to the recognition of previously deferred revenues associated with storm restoration costs in South Carolina and favorable transmission revenues; and
a $36 million increase in weather-normal retail sales volumes.
Operating Expenses. The variance was driven primarily by:
a $145$192 million decreaseincrease in operations, maintenance and other expenseimpairment charges primarily due to lower expenses at generating plants, lower costs associated with merger commitmentsthe impacts of the North Carolina rate order and charges related to the Piedmont acquisitioncoal ash costs in 2016, lower severance expenses, and lower employee benefit costs, partially offset by higher energy efficiency program costs.
Partially offset by:South Carolina;
a $25 million increase in fuel expense (including purchased power) primarily due to changes in generation mix, partially offset by lower retail sales; and
a $15$111 million increase in depreciation and amortization expense primarily due to additional plant in service, new depreciation rates associated with the North Carolina rate case and higher amortization of deferred coal ash costs, partially offset by lower amortization of certain regulatory assets.assets; and



MD&ADUKE ENERGY CAROLINAS


a $109 million increase in operations, maintenance and other expense primarily due to severance charges.
Other Income and Expenses.Expenses, net. The variance was primarily due to lower AFUDC equity related to the Lee Nuclear Project and W.S. Lee CC and a decrease in recognition of post in-service equity returns for projects that had been completed prior to being reflected in customer rates.
Interest Expense. The variance was primarily due to higher debt outstanding in the current year.
Income Tax Expense. The variance was primarily due to an increase in pretax income and the impact oflower statutory federal corporate tax rate under the Tax Act, offset byAct. The ETRs for the impact of research creditsyears ended December 31, 2018, and 2017 were 22.1 percent and 34.9 percent, respectively. The decrease in the manufacturing deduction. SeeETR was primarily due to the Subsidiary Registrants section above for additional information onlower statutory federal corporate tax rate under the Tax Act and the impact on the effective tax rate.amortization of state excess deferred taxes.
Matters Impacting Future Results
An order from regulatory authorities disallowing recovery of costs related to closure of ash impoundments could have an adverse impact on Duke Energy Carolinas' financial position, results of operations and cash flows. See Notes 4 and 9 to the Consolidated Financial Statements, “Regulatory Matters” and "Asset Retirement Obligations," respectively, for additional information.
On May 18, 2016, the NCDEQ issued proposed risk classifications for all coal ash surface impoundments in North Carolina. All ash impoundments not previously designated as high priority by the Coal Ash Act were designated as intermediate risk. Certain impoundments classified as intermediate risk, however, may be reassessed in the futurewere eligible for reassessment as low risklow-risk pursuant to legislation enacted on July 14, 2016. On November 14, 2018, NCDEQ issued final low risk classifications for these impoundments, indicating that Duke Energy Carolinas' estimated AROs related toCarolinas had satisfied the closure of North Carolina ash impoundments are based uponpermanent replacement water supply and certain dam improvement requirements set out in the mandated closure method or a probability weighting of potential closure methods for the impoundments that may be reassessed to low risk.Coal Ash Management Act. As the final risk ranking classifications in North Carolina are delineated, final closure plans and corrective action measures are developed and approved for each site, the closure work progresses, and the closure method scope and remedial action methods are determined, the complexity of work and the amount of coal combustion material could be different than originally estimated and, therefore, could materially impact Duke Energy Carolinas' results of operations, financial position.position and cash flows. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations," for additional information.
Duke Energy Carolinas is a party to multiple lawsuits and subject to fines and other penalties related to operations at certain North Carolina facilities with ash basins. In addition, the order issued in the Duke Energy Carolinas North Carolinas rate case supporting recovery of past coal ash remediation costs has been appealed by various parties. The outcome of these appeals, lawsuits, fines and penalties could have an adverse impact on Duke Energy Carolinas’ financial position, results of operations, financial position and cash flows. See NoteNotes 4 and 5 to the Consolidated Financial Statements, "Regulatory Matters" and “Commitments and Contingencies,” respectively, for additional information.
On June 22, 2018, Duke Energy Carolinas filedreceived an order from the NCUC, which denied the Grid Rider Stipulation and deferral treatment of grid improvement costs. Duke Energy Carolinas may petition for deferral of grid modernization costs outside of a general rate case proceeding if it can show financial hardship or a stipulation that includes greater consensus among intervening parties on August 25, 2017, to recover costs of complying with CCR regulations and the Coal Ash Act,being classified as well as costs of capital investments in generation, transmission and distribution systems and any increase in expenditures subsequent to previous rate cases.grid modernization. Duke Energy Carolinas' earningsresults of operations, financial position and cash flows could be adversely impacted if grid modernization costs are not ultimately approved for recovery and/or deferral treatment. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
During the last half of 2018, Duke Energy Carolinas’ service territory was impacted by several named storms. Hurricane Florence, Hurricane Michael and Winter Storm Diego caused flooding, extensive damage and widespread power outages in the service territory. A significant portion of the incremental operation and maintenance expenses related to these storms have been deferred. On December 21, 2018, Duke Energy Carolinas filed with the NCUC a petition for approval to defer the incremental storm costs incurred to a regulatory asset for recovery in the next base rate increase is delayed or deniedcase. An order from regulatory authorities disallowing the deferral and future recovery of storm restoration costs could have an adverse impact on Duke Energy Carolinas' results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information.
Appeals of the recently approved rate case for Duke Energy Carolinas are pending at the North Carolina Supreme Court. The North Carolina Attorney General and various intervenors primarily dispute the allowance of recovery of coal ash costs from customers, which was approved by the NCUC. The outcome of these appeals could have an adverse impact to Duke Energy Carolina's results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.

54


PART II

PROGRESS ENERGY
 Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Basis of Presentation
The results of operations and variance discussion for Progress Energy is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.



MD&APROGRESS ENERGY


Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 Variance
2018
 2017
 Variance
Operating Revenues$9,783
 $9,853
 $(70)$10,728
 $9,783
 $945
Operating Expenses          
Fuel used in electric generation and purchased power3,417
 3,644
 (227)3,976
 3,417
 559
Operation, maintenance and other2,220
 2,386
 (166)2,613
 2,301
 312
Depreciation and amortization1,285
 1,213
 72
1,619
 1,285
 334
Property and other taxes503
 487
 16
529
 503
 26
Impairment charges156
 7
 149
87
 156
 (69)
Total operating expenses7,581
 7,737
 (156)8,824
 7,662
 1,162
Gains on Sales of Other Assets and Other, net26
 25
 1
24
 26
 (2)
Operating Income2,228
 2,141
 87
1,928
 2,147
 (219)
Other Income and Expenses, net128
 114
 14
165
 209
 (44)
Interest Expense824
 689
 135
842
 824
 18
Income From Continuing Operations Before Income Taxes1,532
 1,566
 (34)
Income Tax Expense From Continuing Operations264
 527
 (263)
Income from Continuing Operations1,268
 1,039
 229
Income from Discontinued Operations, net of tax
 2
 (2)
Income Before Income Taxes1,251
 1,532
 (281)
Income Tax Expense218
 264
 (46)
Net Income1,268
 1,041
 227
1,033
 1,268
 (235)
Less: Net Income Attributable to Noncontrolling Interests10
 10
 
6
 10
 (4)
Net Income Attributable to Parent$1,258
 $1,031
 $227
$1,027
 $1,258
 $(231)
Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. The variance was driven primarily by:
a $231$614 million decreaseincrease in fuel and capacity revenues primarily due to loweran increase in fuel and capacity rates billed to retail salescustomers and changesincreased demand;
a $149 million increase in generation mix atretail pricing due to the impacts of the Duke Energy Progress;Progress North Carolina and
an $87 million decrease in retail sales, net of fuel revenues, due South Carolina rate cases and Duke Energy Florida base rate adjustments related to less favorable weather in the current year.
Partially offset by:generation assets being placed into service;
a $108 million increase in retail pricingsales due to favorable weather in the current year, net of lost revenue impacts associated with Hurricane Irma in 2017 and Hurricane Florence in 2018;
a $96 million increase in wholesale power revenues, net of fuel, primarily due to Duke Energy Florida’s base rate adjustment for the Osprey Acquisitionrecovery of coal ash costs and the completion of the Hines Energy Complex Chiller Uprate Project, as well as the Duke Energy Progress South Carolina rate case;
a $76 million increase in rider revenues related to energy efficiency programshigher peak demand at Duke Energy Progress, as well as nuclear asset securitization beginningProgress;
a $34 million net increase in July 2016 and extended uprate projectretail rider revenues beginning in 2017conjunction with the implementation of new base rates at Duke Energy Florida;Progress; and
a $51$47 million increase in weather-normal retail sales volumesvolumes.
Partially offset by:
a $119 million decrease in retail sales due to retail customers.revenues subject to refund to customers associated with the lower statutory federal corporate tax rate under the Tax Act at Duke Energy Progress.
Operating Expenses. The variance was driven primarily by:
a $227$559 million decreaseincrease in fuel expenseused in electric generation and purchased power primarily due to lower retail saleshigher amortization of deferred fuel and capacity expenses, increased demand and changes in generation mixmix;
a $334 million increase in depreciation and amortization expense primarily due to higher amortization of deferred coal ash costs and new depreciation rates associated with the North Carolina rate case at Duke Energy Progress;Progress, and accelerated depreciation of Crystal River Units 4 and 5 at Duke Energy Florida;
a $166$312 million decreaseincrease in operations,operation, maintenance and other expense primarily due to lower plant outage, storm restorationhigher costs related to storms, vegetation management costs and labor costs.severance charges; and
a $26 million increase in property and other taxes primarily due to higher revenue related taxes at Duke Energy Florida.



55

MD&APROGRESS ENERGY

PART II

Partially offset by:
a $149$69 million increasedecrease in impairment charges primarily due to the write-off of remaining unrecovered Levy Nuclear Project costs in the prior year, offset by the current year impairment of the Citrus County CC at Duke Energy Florida and the disallowanceimpacts associated with the North Carolina rate case at Duke Energy Progress.
Other Income and Expenses, net. The variance was primarily due to lower income from rate basenon-service components of certain projects at the Mayo and Sutton plantsemployee benefit costs in the current year at Duke Energy Progress relatedand Duke Energy Florida. For additional information on employee benefit costs, see Note 22 to the partial settlement in the North Carolina rate case; andConsolidated Financial Statements, "Employee Benefit Plans."
a $72 million increase in depreciation and amortization expenseInterest Expense. The variance was primarily due to additional plant in service, as well as nuclear regulatory asset amortizationnew debt issuances at Duke Energy Florida.
Interest Expense. The variance was due to higher debt outstanding, as well as interest charges on North Carolina fuel over collections at Duke Energy Progress and lower debt returns driven by the CR3 regulatory asset debt return ending in June 2016 upon securitization at Duke Energy Florida.Progress.
Income Tax Expense. The variance was primarily due to the lower statutory federal corporate tax rate under the Tax Act partially offset by the favorable impact of the Tax Act. SeeAct in the Subsidiary Registrants section aboveprior year. The effective tax rate for additional information onthe years ended December 31, 2018, and 2017 were 17.4 percent and 17.2 percent, respectively. The change in the effective tax rate was primarily due to the favorable impact of the Tax Act in the prior year mostly offset by the lower statutory federal corporate tax rate under the Tax Act and the impact onamortization of federal and state excess deferred taxes in the effective tax rate.current year.
Matters Impacting Future Results
An order from regulatory authorities disallowing recovery of costs related to closure of ash impoundments could have an adverse impact on Progress Energy’s financial position, results of operations and cash flows. See Notes 4 and 9 to the Consolidated Financial Statements, “Regulatory Matters” and "Asset Retirement Obligations," respectively, for additional information.
On May 18, 2016, the NCDEQ issued proposed risk classifications for all coal ash surface impoundments in North Carolina. All ash impoundments not previously designated as high priority by the Coal Ash Act were designated as intermediate risk. Certain impoundments classified as intermediate risk, however, may be reassessed in the futurewere eligible for reassessment as low risklow-risk pursuant to legislation enacted on July 14, 2016. On November 14, 2018, NCDEQ issued final low risk classifications for these impoundments, indicating that Progress Energy's estimated AROs related toEnergy had satisfied the closure of North Carolina ash impoundments are based uponpermanent replacement water supply and certain dam improvement requirements set out in the mandated closure method or a probability weighting of potential closure methods for the impoundments that may be reassessed to low risk.Coal Ash Management Act. As the final risk ranking classifications in North Carolina are delineated, final closure plans and corrective action measures are developed and approved for each site, the closure work progresses, and the closure method scope and remedial action methods are determined, the complexity of work and the amount of coal combustion material could be different than originally estimated and, therefore, could materially impact Progress Energy's results of operations, financial position.position and cash flows. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations," for additional information.
Duke Energy Progress is a party to multiple lawsuits and subject to fines and other penalties related to operations at certain North Carolina facilities with ash basins. As noted above, the order issued in the Duke Energy Progress North Carolinas rate case supporting recovery of past coal ash remediation costs has been appealed by various parties. The outcome of these appeals, lawsuits, fines and penalties could have an adverse impact on Progress Energy’s financial position, results of operations, financial position and cash flows. See NoteNotes 4 and 5 to the Consolidated Financial Statements, "Regulatory Matters" and “Commitments and Contingencies,” respectively, for additional information.
Duke Energy Carolinas received an order from the NCUC, which denied the Grid Rider Stipulation and deferral treatment of grid improvement costs. The NCUC did allow Duke Energy Carolinas to petition for deferral of grid modernization costs outside of a general rate case proceeding if it can show financial hardship or a stipulation that includes greater consensus among intervening parties on costs being classified as grid modernization. While Duke Energy Progress did not request recovery of these costs in its most recent case with the NCUC, Duke Energy Progress may request recovery of certain grid modernization costs in future regulatory proceedings. If the NCUC were to rule similarly, Progress Energy's results of operations, financial position and cash flows could be adversely impacted if grid modernization costs are not ultimately approved for recovery and/or deferral treatment. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
InDuring the fourth quarterlast half of 2016,2018, Duke Energy Progress and Duke Energy Florida’s service territories were impacted by several named storms. Hurricane MatthewFlorence, Hurricane Michael and Winter Storm Diego caused historic flooding, extensive damage and widespread power outages withinto the service territory of Duke Energy Progress. Duke Energy Florida’s service territory was also impacted by Hurricane Michael, a Category 4 hurricane and the most powerful storm to hit the Florida Panhandle in recorded history. A significant portion of the incremental operation and maintenance expenses related to these storms have been deferred. On December 21, 2018, Duke Energy Progress service territory.filed with the NCUC a petition for approval to defer the incremental storm costs incurred to a regulatory asset for recovery in the next base rate case. Duke Energy Progress filed a petitionsimilar request with the North Carolina Utilities Commission (NCUC) requesting an accounting order to defer incremental operationPSCSC on January 11, 2019, which also included a request for the continuation of prior deferrals requested for other storms, and maintenance and capital costs incurred in response to Hurricane Matthew and other significant 2016 storms. The NCUC will address this request inon January 30, 2019, the PSCSC issued a directive approving the deferral request. Duke Energy Progress' currently pending rate case. A finalFlorida anticipates filing a petition in the first half of 2019 with the FPSC to recover incremental storm costs consistent with the provisions in its 2017 Settlement. An order from the NCUC that disallowsregulatory authorities disallowing the deferral and future recovery of all or a significant portion of the incremental storm restoration costs incurred could result inhave an adverse impact on Electric Utilities and Infrastructure'sProgress Energy's results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information.
Appeals of the recently approved rate case for Duke Energy Progress are pending at the North Carolina Supreme Court. The North Carolina Attorney General and various intervenors primarily dispute the allowance of recovery of coal ash costs from customers, which was approved by the NCUC. The outcome of these appeals could have an adverse impact to Progress Energy's results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
Duke Energy Progress filedOn February 6, 2018, the FPSC approved a general rate case withstipulation that would apply tax savings resulting from the NCUC on June 1, 2017. Duke Energy Progress will seek to recoverTax Act toward storm costs effective January 2018 in lieu of complying with CCR regulations and the Coal Ash Act, as well as costs of capital investments in generation, transmission and distribution systems and any increase in expenditures subsequent to previous rate cases. Progress Energy's earnings could be adversely impacted if the rate increase is delayed or denied by the NCUC.
implementing a storm surcharge. On August 29, 2017,May 31, 2018, Duke Energy Florida filed for recovery of the 2017 Settlement withstorm costs. Storm costs are currently expected to be fully recovered by approximately mid-2021. The commission has scheduled the FPSC. On November 20, 2017, the FPSC issuedhearing to begin on May 21, 2019. An order disallowing recovery of these costs could have an order to approve the 2017 Settlement.adverse impact on Progress Energy's results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information about the 2017 Settlement. In accordance with the 2017 Settlement, Duke Energy Florida will not seek recovery of any costs associated with the ongoing Westinghouse contract litigation, which is currently being appealed. See Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies” for additional information about the litigation. An unfavorable appeals ruling on that matter could have an adverse impact on Electric Utilities and Infrastructure’s financial position, results of operations and cash flows.information.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.



56

MD&ADUKE ENERGY PROGRESS

PART II

DUKE ENERGY PROGRESS
Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Basis of Presentation
The results of operations and variance discussion for Duke Energy Progress is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.
Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 Variance
2018
 2017
 Variance
Operating Revenues$5,129
 $5,277
 $(148)$5,699
 $5,129
 $570
Operating Expenses          
Fuel used in electric generation and purchased power1,609
 1,830
 (221)1,892
 1,609
 283
Operation, maintenance and other1,389
 1,504
 (115)1,578
 1,439
 139
Depreciation and amortization725
 703
 22
991
 725
 266
Property and other taxes156
 156
 
155
 156
 (1)
Impairment charges19
 1
 18
33
 19
 14
Total operating expenses3,898
 4,194
 (296)4,649
 3,948
 701
Gains on Sales of Other Asset and Other, net4
 3
 1
Gains on Sales of Other Assets and Other, net9
 4
 5
Operating Income1,235
 1,086
 149
1,059
 1,185
 (126)
Other Income and Expenses, net65
 71
 (6)87
 115
 (28)
Interest Expense293
 257
 36
319
 293
 26
Income Before Income Taxes1,007
 900
 107
827
 1,007
 (180)
Income Tax Expense292
 301
 (9)160
 292
 (132)
Net Income$715
 $599
 $116
$667
 $715
 $(48)
The following table shows the percent changes in GWh sales and average number of customers for Duke Energy Progress. The below percentages for retail customer classes represent billed sales only. Total sales includes billed and unbilled retail sales and wholesale sales to incorporated municipalities and to public and private utilities and power marketers. Amounts are not weather-normalized.
Increase (Decrease) over prior year2017
 2016
2018
 2017
Residential sales(2.6)% (1.5)%9.9% (2.6)%
General service sales(1.3)% 0.2 %2.3% (1.3)%
Industrial sales1.1 % (0.1)%0.8% 1.1 %
Wholesale power sales(2.9)% 18.4 %4.6% (2.9)%
Joint dispatch sales(17.1)% 17.7 %2.1% (17.1)%
Total sales(3.2)% 6.4 %3.8% (3.2)%
Average number of customers1.4 % 1.3 %1.5% 1.4 %
Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. The variance was driven primarily by:
a $238$324 million decreaseincrease in fuel revenues due to lowerdriven by higher retail sales and changes in generation mix; and
a $37 million decrease in retail sales, net of fuel revenues, due to less favorable weather in the current year, partially offset by lower lost revenues related to hurricanes in the current year.
Partially offset by:
a $40 million increase in rider revenues primarily due to energy efficiency programs;
a $38$125 million increase in retail salespricing due to the impacts from the North Carolina and South Carolina rate case; andcases;
a $31$96 million increase in wholesale power revenues, net of fuel, primarily due to recovery of coal ash costs and higher peak demand.demand;
a $34 million net increase in retail rider revenues in conjunction with the implementation of new base rates;
a $61 million increase in retail sales due to favorable weather in the current year, net of the impact of lost revenues due to Hurricane Florence; and
a $35 million increase in weather-normal retail sales volumes.
Partially offset by:
a $119 million decrease in retail sales due to revenues subject to refund to customers associated with the lower statutory federal corporate tax rate under the Tax Act.



MD&ADUKE ENERGY PROGRESS


Operating Expenses. The variance was driven primarily by:
a $221$283 million decreaseincrease in fuel used in electric generation and purchased power primarily due to lowerhigher retail sales and changes in generation mix; and

57


PART II

a $115 million decrease in operation, maintenance and other expense primarily due to lower nuclear outage costs and lower storm restoration costs.
Partially offset by:
a $22$266 million increase in depreciation and amortization expense primarily due to additional planthigher amortization of deferred coal ash costs and new depreciation rates associated with the North Carolina rate case;
a $139 million increase in service;operation, maintenance and other expense primarily due to higher storm costs, impacts associated with the North Carolina rate case and severance charges; and
an $18a $14 million increase in impairment charges primarily due to the disallowance from rate base of certain projects at the Mayo and Sutton plants in the current year related to the partial settlement inassociated with the North Carolina rate case.
Interest Expense.Other Income and Expenses, net. The variance was dueprimarily driven by lower income from non-service components of employment benefit costs. For additional information on employee benefit costs, see Note 22 to higherthe Consolidated Financial Statements, "Employee Benefit Plans."
Interest Expense. The variance was primarily driven by new debt outstanding, as well as interest charges on North Carolina fuel overcollections.issuances.
Income Tax Expense. The variance was primarily due to the lower statutory federal corporate tax rate under the Tax Act partially offset by the favorable impact of the Tax Act in the prior year. The effective tax rates for the years ended December 31, 2018, and 2017 were 19.3 percent and 29.0 percent, respectively. The decrease in the effective tax rate was primarily due to the lower North Carolinastatutory federal corporate tax rates, partially offset by an increase in pretax net income. See the Subsidiary Registrants section above for additional information onrate under the Tax Act and the amortization of state excess deferred taxes partially offset by the impact onof the effective tax rate.Tax Act in the prior year.
Matters Impacting Future Results
An order from regulatory authorities disallowing recovery of costs related to closure of ash impoundments could have an adverse impact on Duke Energy Progress’ financial position, results of operations and cash flows. See Notes 4 and 9 to the Consolidated Financial Statements, “Regulatory Matters” and "Asset Retirement Obligations," respectively, for additional information.
On May 18, 2016, the NCDEQ issued proposed risk classifications for all coal ash surface impoundments in North Carolina. All ash impoundments not previously designated as high priority by the Coal Ash Act were designated as intermediate risk. Certain impoundments classified as intermediate risk, however, may be reassessed in the futurewere eligible for reassessment as low risklow-risk pursuant to legislation enacted on July 14, 2016. On November 14, 2018, NCDEQ issued final low risk classifications for these impoundments, indicating that Duke Energy Progress' estimated AROs related toProgress had satisfied the closure of North Carolina ash impoundments are based uponpermanent replacement water supply and certain dam improvement requirements set out in the mandated closure method or a probability weighting of potential closure methods for the impoundments that may be reassessed to low risk.Coal Ash Management Act. As the final risk ranking classifications in North Carolina are delineated, final closure plans and corrective action measures are developed and approved for each site, the closure work progresses, and the closure method scope and remedial action methods are determined, the complexity of work and the amount of coal combustion material could be different than originally estimated and, therefore, could materially impact Duke Energy Progress' results of operations, financial position.position and cash flows. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations," for additional information.
Duke Energy Progress is a party to multiple lawsuits and subject to fines and other penalties related to operations at certain North Carolina facilities with ash basins. As noted above, the order issued in the Duke Energy Progress North Carolinas rate case supporting recovery of past coal ash remediation costs has been appealed by various parties. The outcome of these appeals, lawsuits, fines and penalties could have an adverse impact on Duke Energy Progress’ financial position, results of operations, financial position and cash flows. See NoteNotes 4 and 5 to the Consolidated Financial Statements, "Regulatory Matters" and “Commitments and Contingencies,” respectively, for additional information.
In the fourth quarter of 2016, Hurricane Matthew caused historic flooding, extensive damage and widespread power outages within the Duke Energy Progress service territory. Duke Energy Progress filed a petition with the North Carolina Utilities Commission (NCUC) requestingCarolinas received an accounting order to defer incremental operation and maintenance and capital costs incurred in response to Hurricane Matthew and other significant 2016 storms. The NCUC will address this request in Duke Energy Progress' currently pending rate case. A final order from the NCUC, which denied the Grid Rider Stipulation and deferral treatment of grid improvement costs. The NCUC did allow Duke Energy Carolinas to petition for deferral of grid modernization costs outside of a general rate case proceeding if it can show financial hardship or a stipulation that disallows the deferral and futureincludes greater consensus among intervening parties on costs being classified as grid modernization. While Duke Energy Progress did not request recovery of all or a significant portionthese costs in its most recent case with the NCUC, Duke Energy Progress may request recovery of certain grid modernization costs in future regulatory proceedings. If the incremental storm restoration costs incurred could result in an adverse impact on Electric Utilities and Infrastructure's financial position,NCUC were to rule similarly, Duke Energy Progress' results of operations, financial position and cash flows.flows could be adversely impacted if grid modernization costs are not ultimately approved for recovery and/or deferral treatment. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
During the last half of 2018, Duke Energy Progress' service territory was impacted by several named storms. Hurricane Florence, Hurricane Michael and Winter Storm Diego caused flooding, extensive damage and widespread power outages in the service territory. A significant portion of the incremental operation and maintenance expenses related to these storms have been deferred. On December 21, 2018, Duke Energy Progress filed with the NCUC a petition for approval to defer the incremental storm costs incurred to a regulatory asset for recovery in the next base rate case. Duke Energy Progress filed a generalsimilar request with the PSCSC on January 11, 2019, which also included a request for the continuation of prior deferrals requested for other storms, and on January 30, 2019, the PSCSC issued a directive approving the deferral request. An order from regulatory authorities disallowing the deferral and future recovery of storm restoration costs could have an adverse impact on Duke Energy Progress' results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information.
Appeals of the recently approved rate case with the NCUC on June 1, 2017.for Duke Energy Progress will seekare pending at the North Carolina Supreme Court. The North Carolina Attorney General and various intervenors primarily dispute the allowance of recovery of coal ash costs from customers, which was approved by the NCUC. The outcome of these appeals could have an adverse impact to recover costs of complying with CCR regulations and the Coal Ash Act, as well as costs of capital investments in generation, transmission and distribution systems and any increase in expenditures subsequent to previous rate cases. Duke Energy Progress' earnings could be adversely impacted if the rate increase is delayed or denied by the NCUC.results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.



58

MD&ADUKE ENERGY FLORIDA

PART II

DUKE ENERGY FLORIDA
Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Basis of Presentation
The results of operations and variance discussion for Duke Energy Florida is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.
Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 Variance
2018
 2017
 Variance
Operating Revenues$4,646
 $4,568
 $78
$5,021
 $4,646
 $375
Operating Expenses          
Fuel used in electric generation and purchased power1,808
 1,814
 (6)2,085
 1,808
 277
Operation, maintenance and other818
 865
 (47)1,025
 853
 172
Depreciation and amortization560
 509
 51
628
 560
 68
Property and other taxes347
 333
 14
374
 347
 27
Impairment charges138
 6
 132
54
 138
 (84)
Total operating expenses3,671
 3,527
 144
4,166
 3,706
 460
Gains on Sales of Other Asset and Other, net1
 
 1
Gains on Sales of Other Assets and Other, net1
 1
 
Operating Income976
 1,041
 (65)856
 941
 (85)
Other Income and Expenses, net61
 44
 17
86
 96
 (10)
Interest Expense279
 212
 67
287
 279
 8
Income Before Income Taxes758
 873
 (115)655
 758
 (103)
Income Tax Expense46
 322
 (276)101
 46
 55
Net Income$712
 $551
 $161
$554
 $712
 $(158)
The following table shows the percent changes in GWh sales and average number of customers for Duke Energy Florida. The below percentages for retail customer classes represent billed sales only. Wholesale power sales include both billed and unbilled sales. Total sales includes billed and unbilled retail sales and wholesale sales to incorporated municipalities and to public and private utilities and power marketers. Amounts are not weather-normalized.
Increase (Decrease) over prior year2017
 2016
2018
 2017
Residential sales(2.3)% 1.7 %4.3 % (2.3)%
General service sales(1.3)% (0.1)%1.9 % (1.3)%
Industrial sales(2.4)% (2.9)%(0.4)% (2.4)%
Wholesale power sales20.1 % 35.2 %5.2 % 20.1 %
Total sales0.5 % 0.9 %2.4 % 0.5 %
Average number of customers1.6 % 1.5 %1.5 % 1.6 %
Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. The variance was driven primarily by:
a $70$290 million increase in retail pricing primarily due to the base rate adjustment for the Osprey acquisitionfuel and the completion of the Hines Energy Complex Chiller Uprate Project;
a $45 million increase in weather-normal sales volumes to retail customers in the current year; and
a $36 million increase in ridercapacity revenues primarily due to nuclear asset securitization beginningan increase in July 2016fuel and extended power uprate project revenues beginning in 2017.
Partially offset by:capacity rates billed to retail customers and increased demand;
a $50$47 million decreaseincrease in retail sales, net of fuel revenues, due to less favorable weather in the current year includingand impacts of lost revenues related torevenue resulting from Hurricane Irma; and
a $34 million decrease in wholesale power revenues primarily due to contracts that expiredIrma in the prior year.year:

a $24 million increase in retail pricing due to base rate adjustments related to generation assets being placed into service; and
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PART II

a $12 million increase in weather-normal retail sales volumes.
Operating Expenses. The variance was driven primarily by:
a $132$277 million increase in fuel used in electric generation and purchased power primarily due to higher amortization of deferred fuel and capacity expenses and increased purchased power and demand;
a $172 million increase in operation, maintenance and other expense primarily due to higher storm cost amortization, vegetation management costs and severance charges, partially offset by lower storm restoration costs in the current year;



MD&ADUKE ENERGY FLORIDA


a $68 million increase in depreciation and amortization expense primarily due to accelerated depreciation of Crystal River Units 4 and 5 and additional plant in service; and
a $27 million increase in property and other taxes primarily due to higher revenue related taxes.
Partially offset by:
an $84 million decrease in impairment charges primarily due to the write-off of remaining unrecovered Levy Nuclear Project costs in the prior year, offset by the current year;year impairment of the Citrus County CC.
Other Income and
a $51 million increase in depreciation and amortization expense Expenses, net. The variance was driven primarily due to nuclear regulatory asset amortization, as well as additional plant in service.
Partially offset by:
a $47 million decrease in operations and maintenance expense primarily due toby lower planned outage costs, lower severance expenses and lowerincome from non-service components of employee benefit costs, partially offset by higher storm restoration costs in the current year.
Other Income and Expenses. The variance was primarily driven by higher AFUDC equity.
Interest Expense. The variance was primarily due For additional information on employee benefit costs, see Note 22 to higher debt outstanding and lower debt returns driven by the Crystal River Unit 3 regulatory asset debt return ending in June 2016 upon securitization.Consolidated Financial Statements, "Employee Benefit Plans."
Income Tax Expense. The variance was primarily due to the favorable impact of the Tax Act in the prior year partially offset by the lower statutory federal corporate tax rate under the Tax Act in the current year. The effective tax rates for the years ended December 31, 2018, and 2017 were 15.4 percent and 6.1 percent, respectively. The increase in the effective tax rate was primarily due to the favorable impact of the Tax Act in the prior year partially offset by the lower pretax earnings. See the Subsidiary Registrants section above for additional information onstatutory federal corporate tax rate under the Tax Act and the impact onamortization of federal excess deferred taxes in the effective tax rate.current year.
Matters Impacting Future Results
On August 29, 2017,October 10, 2018, Hurricane Michael made landfall on Florida's Panhandle as a Category 4 hurricane, the most powerful storm to hit the Florida Panhandle in recorded history. The storm caused significant damage within the service territory of Duke Energy Florida, filedparticularly from Panama City Beach to Mexico Beach. Duke Energy Florida has not completed the 2017 Settlementfinal accumulation of total estimated storm restoration costs incurred. Given the magnitude of the storm, Duke Energy Florida anticipates filing a petition in the first half of 2019 with the FPSC. On November 20,FPSC to recover incremental storm costs consistent with the provisions in its 2017 Settlement. An order from regulatory authorities disallowing the FPSC issuedfuture recovery of storm restoration costs could have an order to approve the 2017 Settlement.adverse impact on Duke Energy Florida's financial position, results of operations and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information aboutinformation.
On February 6, 2018, the 2017 Settlement. In accordance withFPSC approved a stipulation that would apply tax savings resulting from the 2017 Settlement,Tax Act toward storm costs effective January 2018 in lieu of implementing a storm surcharge. On May 31, 2018, Duke Energy Florida will not seekfiled for recovery of anythe storm costs. Storm costs associated withare currently expected to be fully recovered by approximately mid-2021. The commission has scheduled the ongoing Westinghouse contract litigation, which is currently being appealed. See Note 5hearing to the Consolidated Financial Statements, “Commitments and Contingencies” for additional information about the litigation.begin on May 21, 2019. An unfavorable appeals ruling on that matterorder disallowing recovery of these costs could have an adverse impact on Electric Utilities and Infrastructure’s financial position,Duke Energy Florida's results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.



60

MD&ADUKE ENERGY OHIO

PART II

DUKE ENERGY OHIO
 Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Basis of Presentation
The results of operations and variance discussion for Duke Energy Ohio is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.
Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
2016
Variance
2018
2017
Variance
Operating Revenues  

  

Regulated electric$1,373
$1,410
$(37)$1,450
$1,373
$77
Regulated natural gas506
508
(2)
Nonregulated electric and other42
31
11
1
42
(41)
Regulated natural gas508
503
5
Total operating revenues1,923
1,944
(21)1,957
1,923
34
Operating Expenses  
Fuel used in electric generation and purchased power – regulated369
442
(73)412
369
43
Fuel used in electric generation and purchased power – nonregulated58
51
7

58
(58)
Cost of natural gas 107
103
4
113
107
6
Operation, maintenance and other524
512
12
480
530
(50)
Depreciation and amortization261
233
28
268
261
7
Property and other taxes278
258
20
290
278
12
Impairment charges1

1

1
(1)
Total operating expenses1,598
1,599
(1)1,563
1,604
(41)
Gains on Sales of Other Assets and Other, net1
2
(1)
(Losses) Gains on Sales of Other Assets and Other, net(106)1
(107)
Operating Income326
347
(21)288
320
(32)
Other Income and Expenses, net17
9
8
23
23

Interest Expense91
86
5
92
91
1
Income from Continuing Operations Before Income Taxes252
270
(18)219
252
(33)
Income Tax Expense from Continuing Operations59
78
(19)43
59
(16)
Income from Continuing Operations193
192
1
176
193
(17)
(Loss) Income from Discontinued Operations, net of tax(1)36
(37)
(1)1
Net Income$192
$228
$(36)$176
$192
$(16)
The following table shows the percent changes in GWh sales of electricity, dekatherms of natural gas delivered and average number of electric and natural gas customers for Duke Energy Ohio. The below percentages for retail customer classes represent billed sales only. Total sales includes billed and unbilled retail sales and wholesale sales to incorporated municipalities and to public and private utilities and power marketers. Amounts are not weather-normalized.
Electric Natural GasElectric Natural Gas
Increase (Decrease) over prior year2017
 2016
 2017
 2016
2018
 2017
 2018
 2017
Residential sales(4.0)% 0.7 % (2.6)% (7.8)%12.2 % (4.0)% 18.0% (2.6)%
General service sales(3.1)% 1.3 % 0.7 % (3.6)%3.3 % (3.1)% 15.4% 0.7 %
Industrial sales(2.7)% (0.7)% (2.8)% (5.1)%1.0 % (2.7)% 8.1% (2.8)%
Wholesale electric power sales65.7 % (53.9)% n/a
 n/a
(46.6)% 65.7 % n/a
 n/a
Other natural gas salesn/a
 n/a
 (0.3)% 6.2 %n/a
 n/a
 0.7% (0.3)%
Total sales(2.1)% (1.1)% (1.1)% (3.1)%2.8 % (2.1)% 11.9% (1.1)%
Average number of customers0.8 % 0.8 % 0.7 % 0.5 %0.8 % 0.8 % 0.9% 0.7 %



MD&ADUKE ENERGY OHIO


Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. In 2018, the revenues and related expenses for OVEC are reflected in regulated electric due to the PUCO Order that approved Duke Energy Ohio to recover or credit amounts, through Rider PSR, that result from wholesale market transactions relating to Duke Energy Ohio's entitlement to capacity and energy from OVEC's power plants. In 2017, the revenues and related expenses for OVEC are reflected in nonregulated electric. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters" for additional information.
The variance was driven primarily by:
a $69$44 million decrease in fuel revenues primarily due to lower electric fuel costs and a decreaseincrease in electric and natural gas sales volumes; and
a $16 million decrease in electric retail sales, net of fuel revenues, due to less favorable weather in the current year.

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PART II

Partially offset by:year;
a $38$17 million increase in rider revenuesrevenue primarily duerelated to growth in energy efficiency programs and a rate increase for the distribution capital investment rider, partially offset by a decrease in the percentage of income payment plan rider due to a rate decrease;riders;
a $10$16 million increase in PJM Interconnection, LLC (PJM)financial transmission rights revenues;
a $9$7 million increase in other revenues related to OVEC;point-to-point transmission revenues; and
a $6 million increase in non-nativefuel revenues due to higher natural gas costs.
Partially offset by:
a $48 million decrease in regulated revenues due to revenues subject to refund to customers associated with the lower statutory corporate tax rate under the Tax Act; and
a $7 million decrease in bulk power marketing sales for resale..
Operating Expenses. The variance was driven by:
a $66$50 million decrease in fuel expense, primarily due to lower sales volumes and lower electric fuel costs.
Partially offset by:
a $28 million increase in depreciation and amortization expense due to additional plant in service and a true-up related to SmartGrid assets in the prior year;
a $20 million increase in property and other taxes due to higher property taxes; and
a $12 million increase in operations, maintenance and other expense primarily due to higher energy efficiency programthe FERC approved settlement refund of certain transmission costs previously billed by PJM; and
a $15 million decrease in fuel used in electric generation and higher transmissionpurchased power related to the deferral of OVEC purchased power, which is reflected in regulated electric in 2018 and distribution operations costs; partiallynonregulated electric in 2017, as noted above in the Operating Revenues section.
Partially offset by lower fossil/hydro operations costsby:
a $12 million increase in property and other taxes primarily due to timinghigher property taxes and kilowatt tax;
a $7 million increase in depreciation and amortization expense primarily due to additional plant in service and increased amortization of outage schedules.regulatory assets; and
a $6 million increase in cost of natural gas primarily due to an increase in natural gas sales volumes.
(Losses) Gains on Sales of Other Assets and Other, net. The decrease was driven by the loss on the sale of Beckjord, a nonregulated facility retired during 2014, including the transfer of coal ash basins and other real property and indemnification from any and all potential future claims related to the property, whether arising under environmental laws or otherwise.
Income Tax Expense. The variance was primarily due to the lower statutory federal corporate tax rate under the Tax Act and a decrease in pretax income. The effective tax rates for the years ended December 31, 2018, and 2017 were 19.6 percent and 23.4 percent, respectively. The decrease in the effective tax rate was primarily due to the lower statutory federal corporate tax rate under the Tax Act partially offset by the impact of the Tax Act. SeeAct in the Subsidiary Registrants section above for additional information on the Tax Act and the impact on the effective tax rate.
Income from Discontinued Operations, Net of Tax. The variance was primarily driven by a prior year income tax benefit resulting from immaterial out of period deferred tax liability adjustments related to the Midwest Generation Disposal Group. See Note 2 to the Consolidated Financial Statements, "Acquisitions and Dispositions," for additional information.year.
Matters Impacting Future Results
An order from regulatory authorities disallowing recovery of costs related to closure of ash basins could have an adverse impact on Duke Energy Ohio's financial position, results of operations and cash flows. See Notes 4 and 9 to the Consolidated Financial Statements, “Regulatory Matters” and "Asset Retirement Obligations," respectively, for additional information.
Duke Energy Ohio’s nonregulated Beckjord station, a facility retired during 2014, is not subject to the EPA rule related to the disposal of CCR from electric utilities. However, if costs are incurred as a result of environmental regulations or to mitigate risk associated with on-site storage of coal ash at the facility, the costs could have an adverse impact on Duke Energy Ohio's financial position, results of operations and cash flows.
Duke Energy Ohio has a 9 percent ownership interest in OVEC, which owns 2,256 MW of coal-fired generation capacity. As a counterparty to an ICPA, Duke Energy Ohio has a contractual arrangement to receive entitlements to capacity and energy from OVEC’s power plants through June 2040 commensurate with its power participation ratio, which is equivalent to Duke Energy Ohio’s ownership interest. Costs, including fuel, operating expenses, fixed costs, debt amortization and interest expense, are allocated to counterparties to the ICPA, including Duke Energy Ohio, based on their power participation ratio. The value of the ICPA is subject to variability due to fluctuations in power prices and changes in OVEC’s costs of business. Deterioration in the credit quality or bankruptcy of one or more parties to the ICPA could increase the costs of OVEC. In addition, certain proposed environmental rulemaking costs could result in future increased cost allocations.
On March 2, 2017, Duke Energy Ohio filed an electric distribution base rate application with the PUCO to address recovery of electric distribution system capital investments and any increase in expenditures subsequent to previous rate cases. The application also includes requests to continue certain current riders and establish new riders related to LED Outdoor Lighting Service and regulatory mandates. Duke Energy Ohio's earnings could be adversely impacted if the rate case and requested riders are delayed or denied by the PUCO. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for additional information.
On September 1, 2017, Duke Energy Kentucky filed a base rate case with the KPSC to recover costs of capital investments in generation, transmission and distribution systems and to recover other incremental expenses since its last rate case filed in 2006. The application also includes request to establish new riders. Duke Energy Kentucky’s earnings could be adversely impacted if the rate increase is delayed or denied by the KPSC.
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.



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MD&ADUKE ENERGY INDIANA

PART II

DUKE ENERGY INDIANA
 Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the years ended December 31, 2018, 2017 2016 and 2015.2016.
Basis of Presentation
The results of operations and variance discussion for Duke Energy Indiana is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.
Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
2016
Variance
2018
2017
Variance
Operating Revenues$3,047
$2,958
$89
$3,059
$3,047
$12
Operating Expenses  
Fuel used in electric generation and purchased power966
909
57
1,000
966
34
Operation, maintenance and other733
723
10
788
743
45
Depreciation and amortization458
496
(38)520
458
62
Property and other taxes76
58
18
78
76
2
Impairment charges18
8
10
30
18
12
Total operating expenses2,251
2,194
57
2,416
2,261
155
Gains on Sales of Other Assets and Other, net
1
(1)
Operating Income796
765
31
643
786
(143)
Other Income and Expenses, net37
22
15
45
47
(2)
Interest Expense178
181
(3)167
178
(11)
Income Before Income Taxes655
606
49
521
655
(134)
Income Tax Expense301
225
76
128
301
(173)
Net Income $354
$381
$(27)$393
$354
$39
The following table shows the percent changes in GWh sales and average number of customers for Duke Energy Indiana. The below percentages for retail customer classes represent billed sales only. Total sales includes billed and unbilled retail sales and wholesale sales to incorporated municipalities and to public and private utilities and power marketers. Amounts are not weather-normalized.
Increase (Decrease) over prior year2017
 2016
2018
 2017
Residential sales(3.8)% (0.4)%12.5 % (3.8)%
General service sales(2.4)% 0.7 %2.8 % (2.4)%
Industrial sales0.3 % 0.4 %0.5 % 0.3 %
Wholesale power sales(10.5)% 10.8 %(0.9)% (10.5)%
Total sales(3.6)% 2.5 %3.3 % (3.6)%
Average number of customers0.8 % 1.1 %1.3 % 0.8 %
Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. The variance was driven primarily by:
a $67$65 million increase in rate rider revenues primarily related to the Edwardsport IGCC plant and the Transmission, Distribution and Storage System Improvement Charge (TDSIC) and energy efficiency programs; andTDSIC rider;
a $48$50 million increase in fuel and other revenues primarily due to higher purchased power costs passed through to customersbase fuel, non-native fuel and higher financial transmission rights (FTR) revenues.
Partially offset by:Midwest Independent System Operator rider revenues;
a $13 million decreaseincrease in retail sales, net of fuel revenues, due to less favorable weather in the current year; and
a $13 million increase in weather-normal retail sales volumes.
Partially offset by:
a $105 million decrease due to revenues subject to refund to customers associated with the lower statutory federal corporate tax rate under the Tax Act; and
a $27 million decrease in wholesale power revenues, net of fuel, primarily due to a decrease in demand rates and contracts that expired in the currentprior year.
Operating Expenses.The variance was driven primarily by:
a $57$62 million increase in depreciation and amortization expense primarily due to additional plant in service and the deferral of certain asset retirement obligations in the prior year;



MD&ADUKE ENERGY INDIANA


a $45 million increase in operation, maintenance and other expense primarily due to amortization of previously deferred expenses, and higher transmission, storm and customer related costs;
a $34 million increase in fuel used in electric generation and purchased power expenses, primarily due to higher purchased power volumes, partially offset by favorable fuel prices;
an $18 million increase in property and other taxes primarily due to higher franchise taxes;

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a $10 million increase in operations, maintenance and other expense primarily due to growth in energy efficiency programs and higher transmissionnatural gas costs; and
a $10$12 million increase in impairments and otherimpairment charges primarily due to the reduction of a regulatory asset pertaining to the Edwardsport IGCC settlement agreement in the current year, partially offset by the impairment of certain metering equipment not recoverable in customer rates.
Partially offset by:
a $38 million decrease in depreciation and amortization primarily due to the recognition of certain asset retirement obligations in 2016 that were subsequently deferred in 2017, partially offset by new IGCC rates that result in a lower deferral amount and higher depreciation due to additional plant in service.prior year.
Other Income andInterest Expense. The variance was driven primarily due to lower post in-service carrying costs due to three coal ash projects placed in service in December 2017, partially offset by higher intercompany money pool interest expense, higher AFUDC equity.debt balances and higher floating rate debt interest expense.
Income Tax Expense. The variance was primarily due to the lower statutory federal corporate tax rate under the Tax Act. The effective tax rates for the years ended December 31, 2018, and 2017 were 24.6 percent and 46.0 percent, respectively. The decrease in the effective tax rate was primarily due to the lower statutory federal corporate tax rate under the Tax Act and by the impact of the Tax Act and an increase in pretax income. See the Subsidiary Registrants section above for additional information on the Tax Act and the impact on the effective tax rate.prior year.
Matters Impacting Future Results
On April 17, 2015, the EPA published in the Federal Register a rule to regulate the disposal of CCR from electric utilities as solid waste. Duke Energy Indiana has interpreted the rule to identify the coal ash basin sites impacted and has assessed the amounts of coal ash subject to the rule and a method of compliance. Duke Energy Indiana's interpretation of the requirements of the CCR rule is subject to potential legal challenges and further regulatory approvals, which could result in additional ash basin closure requirements, higher costs of compliance and greater AROs. Additionally, Duke Energy Indiana has retired facilities that are not subject to the CCR rule. Duke Energy Indiana may incur costs at these facilities to comply with environmental regulations or to mitigate risks associated with on-site storage of coal ash. An order from regulatory authorities disallowing recovery of costs related to closure of ash basins could have an adverse impact on Duke Energy Indiana's financial position, results of operations, financial position and cash flows. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
In August 2016, the Indiana Utility Regulatory Commission (IURC) approved a settlement agreement between Duke Energy Indiana and multiple parties that resolves all disputes, claims and issues from the IURC proceedings related to post-commercial operating performance and recovery of ongoing operating and capital costs at the Edwardsport IGCC generating facility. The settlement agreement imposed a cost cap for retail recoverable operations and maintenance costs through 2017. An inability to manage future operating costs may result in unfavorable orders that could have an adverse impact on Duke Energy Indiana's financial position, results of operations and cash flows. 
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.

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PART II

PIEDMONT
 Introduction
Management’s Discussion and Analysis should be read in conjunction with the accompanying Consolidated Financial Statements and Notes for the yearyears ended December 31, 2018, and 2017, Piedmont's Annual Report on Form 10-K for the year ended October 31, 2016, and the Form 10-QT as of December 31, 2016, for the transition period from November 1, 2016, to December 31, 2016. The unaudited results of operations for the year ended December 31, 2016, waswere derived from data previously reported in the reports noted above.
Basis of Presentation
The results of operations and variance discussion for Piedmont is presented in a reduced disclosure format in accordance with General Instruction (I)(2)(a) of Form 10-K.



MD&APIEDMONT


Results of Operations
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 Variance
2018
 2017
 Variance
Operating Revenues          
Regulated natural gas$1,319
 $1,201
 $118
$1,365
 $1,319
 $46
Nonregulated natural gas and other9
 10
 (1)10
 9
 1
Total operating revenues1,328
 1,211
 117
1,375
 1,328
 47
Operating Expenses          
Cost of natural gas524
 451
 73
584
 524
 60
Operation, maintenance and other315
 353
 (38)357
 304
 53
Depreciation and amortization148
 138
 10
159
 148
 11
Property and other taxes48
 43
 5
49
 48
 1
Impairment charges7
 
 7

 7
 (7)
Total operating expenses1,042
 985
 57
1,149
 1,031
 118
Operating Income286
 226
 60
226
 297
 (71)
Equity in (losses) earnings of unconsolidated affiliates(6) 26
 (32)
Gain on sale of unconsolidated affiliates
 132
 (132)
Equity in earnings (losses) of unconsolidated affiliates7
 (6) 13
Other income and expenses, net
 1
 (1)14
 (11) 25
Total other income and expenses(6) 159
 (165)21
 (17) 38
Interest Expense79
 69
 10
81
 79
 2
Income Before Income Taxes201
 316
 (115)166
 201
 (35)
Income Tax Expense62
 121
 (59)37
 62
 (25)
Net Income$139
 $195
 $(56)$129
 $139
 $(10)
The following table shows the percent changes in dekatherms delivered and average number of customers. The percentages for all throughput deliveries represent billed and unbilled sales. Amounts are not weather-normalized.
Increase (Decrease) over prior year2017
2016
2018
2017
Residential deliveries(8.1)%(0.8)%23.6 %(8.1)%
Commercial deliveries(4.3)%1.6 %14.9 %(4.3)%
Industrial deliveries(2.2)%0.5 %4.2 %(2.2)%
Power generation deliveries(5.8)%10.7 %23.6 %(5.8)%
For resale(20.9)%1.3 %17.0 %(20.9)%
Total throughput deliveries(5.4)%6.3 %19.0 %(5.4)%
Secondary market volumes(4.2)%120.6 %(8.1)%(4.2)%
Average number of customers1.7 %1.6 %1.6 %1.7 %
Piedmont's throughput was 468,259,777557,145,128 dekatherms and 495,122,794468,259,777 dekatherms for the years ended December 31, 2017,2018, and 2016,2017, respectively. Due to the margin decoupling mechanism in North Carolina and weather normalization adjustment (WNA)WNA mechanisms in South Carolina and Tennessee, changes in throughput deliveries do not have a material impact on Piedmont's revenues or earnings. The margin decoupling mechanism adjusts for variations in residential and commercial use per customer, including those due to weather and conservation. The WNA mechanisms mostly offset the impact of weather on bills rendered, but do not ensure full recovery of approved margin during periods when winter weather is significantly warmer or colder than normal.

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PART II

Year Ended December 31, 2017,2018, as Comparedcompared to 20162017
Operating Revenues. The variance was driven primarily by:
a $74$60 million increase primarily due to higher natural gas costs passed through to customers primarily due to higher volumes sold and higher natural gas prices; and
a $34$37 million increase in revenuesprimarily due to residential and commercial customers,customer revenue, net of natural gas costs passed through to customers, due to customer growth and IMR rate adjustments and new power generation customers.
Partially offset by:
a $51 million decrease primarily due to Integrity Management Rider (IMR)revenues subject to refund to customers associated with the lower statutory corporate tax rate adjustments and customer growth. Increase is also due to new power generation customers, and is partially offset by wholesale marketing revenue; andunder the Tax Act.
a $10 million increase in revenues due to merger-related bill credits applied to customer bills in 2016.



MD&APIEDMONT


Operating Expenses. The variance was driven by:
a $73$60 million increase in costscost of natural gas primarily due to higher volumes sold and higher natural gas costs passed through to customers due to the higher price per dekatherm of natural gas;
a $15$53 million increase in operations, maintenance and other expense primarily due to increased shared services, cost to achieve merger expenses and pension settlement charge; and
an $11 million increase in depreciation expenseand property and franchise taxesamortization expense due to additional plant in service; andservice.
Partially offset by:
a $7 million increasedecrease in impairment charges due to an impairment of software resulting from planned accounting system and process integration in 2018.
Partially offset by:
a $38 million decrease in operations, maintenance and other related to acquisition and integration expenses recorded in the prior year from costs paid to outside parties, primarily financial and legal advisory, severance expenses, retention costs and acceleration of incentive plans, and an accrual for our commitment of charitable contributions and community support.year.
Other Income and Expense.Expenses. The variance was driven by:
a $132$25 million decreaseincrease in gain on saleother income and expenses, net primarily due to higher income from non-service components of unconsolidated affiliates recordedemployee benefit costs in the prior year duecurrent year. For additional information on employee benefit costs, see Note 22 to Piedmont’s sale of its 15 percent ownership interest in SouthStar Energy Services, LLC (SouthStar) on October 3, 2016;the Consolidated Financial Statements, "Employee Benefit Plans"; and
a $32$13 million decreaseincrease in equity in (losses) earnings of unconsolidated affiliates from pipeline investments primarily due to equityfavorable earnings from the investment in SouthStar in the prior year and thepartially offset by unfavorable impacts of the Tax Act in the currentprior year.
Income Tax Expense. The variance was primarily due to a decrease in pretax income and the impact oflower statutory federal corporate tax rate under the Tax Act. SeeThe effective tax rates for the Subsidiary Registrants section above for additional information onyears ended December 31, 2018, and 2017 were 22.3 percent and 30.8 percent, respectively. The decrease in the effective tax rate was primarily due to the lower statutory federal corporate tax rate under the Tax Act and the impact on the effective tax rate..
Matters Impacting Future Results
Within this Item 7, see the Tax Cuts and Jobs Act section above as well as Liquidity and Capital Resources below for discussion of risks associated with the Tax Act.
CRITICAL ACCOUNTING POLICIES AND ESTIMATES
Preparation of financial statements requires the application of accounting policies, judgments, assumptions and estimates that can significantly affect the reported results of operations, cash flows or the amounts of assets and liabilities recognized in the financial statements. Judgments made include the likelihood of success of particular projects, possible legal and regulatory challenges, earnings assumptions on pension and other benefit fund investments and anticipated recovery of costs, especially through regulated operations. 
Management discusses these policies, estimates and assumptions with senior members of management on a regular basis and provides periodic updates on management decisions to the Audit Committee of the Board of Directors.Committee. Management believes the areas described below require significant judgment in the application of accounting policy or in making estimates and assumptions that are inherently uncertain and that may change in subsequent periods.
For further information, see Note 1 to the Consolidated Financial Statements, "Summary of Significant Accounting Policies."
Regulated Operations Accounting
Substantially all of Duke Energy’s regulated operations meet the criteria for application of regulated operations accounting treatment. As a result, Duke Energy is required to record assets and liabilities that would not be recorded for nonregulated entities. Regulatory assets generally represent incurred costs that have been deferred because such costs are probable of future recovery in customer rates. Regulatory liabilities are recorded when it is probable that a regulator will require Duke Energy to make refunds to customers or reduce rates to customers for previous collections or deferred revenue for costs that have yet to be incurred.
Management continually assesses whether recorded regulatory assets are probable of future recovery by considering factors such as as:
applicable regulatory environment changes, changes;
historical regulatory treatment for similar costs in Duke Energy’s jurisdictions, jurisdictions;
litigation of rate orders, orders;
recent rate orders to other regulated entities, entities;
levels of actual return on equity compared to approved rates of return on equityequity; and
the status of any pending or potential deregulation legislation.
If future recovery of costs ceases to be probable, asset write-offs would be recognized in operating income. Additionally, regulatory agencies can provide flexibility in the manner and timing of the depreciation of property, plant and equipment, recognition of asset retirement costs and amortization of regulatory assets, or may disallow recovery of all or a portion of certain assets. For further information on regulatory assets and liabilities, see Note 4 to the Consolidated Financial Statements, “Regulatory Matters.”

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PART II

As required by regulated operations accounting rules, significant judgment can be required to determine if an otherwise recognizable incurred cost such as closure costs for ash impoundments, qualifies to be deferred for future recovery as a regulatory asset. Significant judgment can also be required to determine if revenues previously recognized are for entity specific costs that are no longer expected to be incurred or have not yet been incurred and are therefore a regulatory liability. See Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for a more in-depth discussion of Regulatory Assets and Liabilities.
Regulated operations accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. Other disallowances can require judgments on allowed future rate recovery. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for a discussion of disallowances recorded.

When it becomes probable that regulated assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge, if any, could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash flows.
For further information, see Note 4 to the Consolidated Financial Statements, "Regulatory Matters."
MD&ACRITICAL ACCOUNTING POLICIES AND ESTIMATES


Goodwill Impairment Assessments
Duke Energy allocatesperformed its annual goodwill toimpairment tests for all reporting units as of August 31, 2018, and all of the reporting units' estimated fair value of equity substantially exceeded the carrying value of equity, except for the Commercial Renewables reporting units, which are either the Business Segments listed in Note 3 to the Consolidated Financial Statements or one level below based on how the Business Segment is managed. Duke Energy is required to test goodwill forrecorded impairment at least annually and more frequently if it is more likely than not that thecharges of $93 million. The fair value is less than the carrying value. Duke Energy performs its annual impairment test as of August 31.
Application of the goodwill impairment test requires management's judgment, including determining the fair valuevalues of the reporting unit, which management estimatesunits were calculated using a weighted combination of the income approach, which estimates fair value based on discounted cash flows, and the market approach, which estimates fair value based on market comparables within the utility and energy industries.
Estimated future cash flows under the income approach are based on Duke Energy’s internal business plan. Significant assumptions used in these fair value analyses include discount andare growth rates, future rates of return expected to result from ongoing rate regulation utility sector market performance and transactions, forecasted earnings base, projected operating and capital cash flows for Duke Energy’s business and the fair value of debt.
Estimated future cash flows under the income approach are based to a large extent on Duke Energy’s internal business plan, and adjusted as appropriate for Duke Energy’s views of market participant assumptions. Duke Energy’s internal business plan reflects management’s assumptions related to customer usage and attrition based on internal data and economic data obtained from third-party sources, projected commodity pricing data and potential changes in environmental regulations. The business plan assumes the occurrence of certain events in the future, such as the outcome of future rate filings, future approved rates of returns on equity, anticipated earnings/returns related to significant future capital investments, continued recovery of cost of service, the renewal of certain contracts and the future of renewable tax credits. Management also makes assumptions regarding operation, maintenance and general and administrative costs based on the expected outcome of the aforementioned events. In estimating cash flows, Duke Energy incorporates expected growth rates, regulatory and economic stability, the ability to renew contracts and other factors, into its revenue and expense forecasts.
One of the most significant assumptions that Duke Energy utilizes in determining the fair value of its reporting units under the income approach is the discount rate applied to the estimated future cash flows.rates. Management determines the appropriate discount rate for each of its reporting units based on the weighted average cost of capital (WACC)WACC for each individual reporting unit. The WACC takes into account both the after-tax cost of debt and cost of equity. A major component of the cost of equity is the current risk-free rate on 20-year U.S. Treasury bonds. In the 20172018 impairment tests, Duke Energy considered implied WACCs for certain peer companies in determining the appropriate WACC rates to use in its analysis. As each reporting unit has a different risk profile based on the nature of its operations, including factors such as regulation, the WACC for each reporting unit may differ. Accordingly, the WACCs were adjusted, as appropriate, to account for company specific risk premiums. The discount rates used for calculating the fair values as of August 31, 2017,2018, for each of Duke Energy’s reporting units ranged from 5.35.5 percent to 6.76.9 percent. The underlying assumptions and estimates are made as of a point in time. Subsequent changes, particularly changes in the discount rates, authorized regulated rates of return or growth rates inherent in management’s estimates of future cash flows, could result in future impairment charges.
One of the most significant assumptions utilized in determining the fair value of reporting units under the market approach is implied market multiples for certain peer companies. Management selects comparable peers based on each peer’s primary business mix, operations, and market capitalization compared to the applicable reporting unit and calculates implied market multiples based on available projected earnings guidance and peer company market values as of August 31.
In December 2016, Duke Energy disposed of its International operations and no longer has goodwill associated with the International operations. For further information, see Note 2 to the Consolidated Financial Statements, “Acquisitions and Dispositions.”
Duke Energy primarily operates in environments that are rate-regulated. In such environments, revenue requirements are adjusted periodically by regulators based on factors including levels of costs, sales volumes and costs of capital. Accordingly, Duke Energy’s regulated utilities operate to some degree with a buffer from the direct effects, positive or negative, of significant swings in market or economic conditions. However, significant changes in discount rates over a prolonged period may have a material impact on the fair value of equity.
As of August 31, 2017, all of the reporting units’ estimated fair value of equity substantially exceeded the carrying value of equity, except for the Commercial Renewables reporting units. The goodwill at the Energy Management Solutions reporting unit of Commercial Renewables was evaluated for recoverability in 2017, and Duke Energy recorded impairment charges of $29 million.

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The Commercial Renewables reporting units are impacted by a multitude of factors including, legislative actions related to tax credit extensions, long-term growth rate assumptions and discount rates. As of August 31, 2017, the Renewables reporting unit’s estimated fair value of equity exceeded the carrying value of equity by less than 10 percent. Management continues to monitor these assumptions for any indicators that the fair value of the reporting unit could be below the carrying value and will assess goodwill for impairment as appropriate.
For further information, see Note 11 to the Consolidated Financial Statements, "Goodwill and Intangible Assets."
Asset Retirement Obligations
AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO,equipment at the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be recoverable.
The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the nuclear decommissioning trust fund (NDTF). As a result, accretion expense and depreciation of the associated ARO asset are netted and deferred as a regulatory asset or liability.
Obligations for nuclear decommissioning are based on site-specific cost studies. Duke Energy Carolinas and Duke Energy Progress assume prompt dismantlement of the nuclear facilities after operations are ceased. Duke Energy Florida assumes Crystal River Unit 3 will be placed into a safe storage configuration until eventual dismantlement is completed by 2074. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida also assume that spent fuel will be stored on-site until such time that it can be transferred to a yet to be built U.S. Department of Energy (DOE)DOE facility.
Obligations for closure of ash basins are based upon discounted cash flows of estimated costs for site-specific plans, if known, or probability weightings of the potential closure methods if the closure plans are under development and multiple closure options are being considered and evaluated on a site-by-site basis.
For further information, see Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations."
Long-Lived Asset Impairment Assessments, Excluding Regulated Operations and Equity Method Investments
Property, plant and equipment, excluding plant held for sale, is stated at the lower of carrying value (historical cost less accumulated depreciation and previously recorded impairments) or fair value, if impaired. Duke Energy evaluates property, plant and equipment for impairment when events or changes in circumstances (such as a significant change in cash flow projections or the determination that it is more likely than not that an asset or asset group will be sold) indicate the carrying value of such assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted future cash flows attributable to the assets, as compared with their carrying value.
Performing an impairment evaluation involves a significant degree of estimation and judgment in areas such as identifying circumstances that indicate an impairment may exist, identifying and grouping affected assets and developing the undiscounted future cash flows. If an impairment has occurred, the amount of the impairment recognized is determined by estimating the fair value and recording a loss if the carrying value is greater than the fair value. Additionally, determining fair value requires probability weighting future cash flows to reflect expectations about possible variations in their amounts or timing and the selection of an appropriate discount rate. Although cash flow estimates are based on relevant information available at the time the estimates are made, estimates of future cash flows are, by nature, highly uncertain and may vary significantly from actual results.
When determining whether an asset or asset group has been impaired, management groups assets at the lowest level that has discrete cash flows.
For further information, see Note 10 to the Consolidated Financial Statements, "Property, Plant and Equipment."



MD&ACRITICAL ACCOUNTING POLICIES AND ESTIMATES


Equity Method Investments
Equity method investments are assessed for impairment when conditions exist that indicate that the fair value of the investment is less than book value. If the decline in value is considered to be other-than-temporary, an impairment charge is recorded and the investment is written down to its estimated fair value, which establishes a new cost basis in the investment.
Events or changes in circumstances are monitored that may indicate, in management’s judgment, the carrying value of such investments may have experienced an other-than-temporary decline in value. The fair value of equity method investments is generally estimated using an income approach where significant judgments and assumptions include expected future cash flows, the appropriate discount rate, and probability weighted-scenarios, if applicable. In certain instances, a market approach may also be used to estimate the fair value of the equity method investment.
Events or changes in circumstances that may be indicative of an other-than-temporary decline in value will vary by investment, but may include:
Significant delays in or failure to complete significant growth projects of investees;
Adverse regulatory actions expected to substantially reduce the investee’s product demand or profitability;
Expected financial performance significantly worse than anticipated when initially invested;
Prolonged period the fair value is below carrying value;
A significant or sustained decline in the market value of an investee;
Lower than expected cash distributions from investees;
Significant asset impairments or operating losses recognized by investees; and
Loss of significant customers or suppliers with no immediate prospects for replacement.
ACP
As of December 31, 2018, the carrying value of the equity method investment in ACP is $0.8 billion, and Duke Energy's maximum exposure to loss for its guarantee of the ACP revolving credit facility is $0.7 billion. During the fourth quarter of 2018, ACP received several adverse court rulings as described in Note 4 to the Consolidated Financial Statements, "Regulatory Matters." As a result, Duke Energy evaluated this investment for impairment and determined that fair value approximated carrying value and therefore no impairment was necessary.
Duke Energy estimated the fair value of its investment in ACP using an income approach that primarily considered probability-weighted scenarios of discounted future net cash flows based on the most recent estimate of total construction costs and revenues. These scenarios included assumptions of various court decisions and the impact those decisions may have on the timing and extent of investment, including scenarios assuming the full resolution of permitting issues in addition to a scenario where the project does not proceed. Most of the scenarios reflect phased in-service date assumptions. Certain scenarios within the analysis also included growth expectations from additional compression or other expansion opportunities and reopeners for pricing. A discount rate of 6.1 percent was used in the analysis. Higher probabilities were generally assigned to those scenarios where court approvals were received and the project moves forward under reasonable timelines reflecting interim rates and either current contracted pricing provisions, or prices subject to the reopeners. A very low probability was assigned to the scenario where the project does not proceed.
Judgments and assumptions are inherent in our estimates of future cash flows, discount rates, growth assumptions, and the likelihood of various scenarios. It is reasonably possible that future unfavorable developments, such as a reduced likelihood of success with court approvals, increased estimates of construction costs, material increases in the discount rate, important feedback on customer price increases or further significant delays, could result in a future impairment. The use of alternate judgments and assumptions could result in a different calculation of fair value, which could ultimately result in the recognition of an impairment charge in the consolidated financial statements.
For further information, see Note 12 to the Consolidated Financial Statements, “Investments in Unconsolidated Affiliates.”
Pension and Other Post-Retirement Benefits
The calculation of pension expense, other post-retirement benefit expense and net pension and other post-retirement assets or liabilities require the use of assumptions and election of permissible accounting alternatives. Changes in assumptions can result in different expense and reported asset or liability amounts and future actual experience can differ from the assumptions. Duke Energy believes the most critical assumptions for pension and other post-retirement benefits are:
the expected long-term rate of return on plan assets;
the assumed discount rate applied to future projected benefit payments; and
the heath care cost trend rate.

Duke Energy elects to amortize net actuarial gain or loss amounts that are in excess of 10 percent of the greater of the market-related value of plan assets or the plan's projected benefit obligation, into net pension or other post-retirement benefit expense over the average remaining service period of active participants expected to benefit under the plan. If all or almost all of a plan's participants are inactive, the average remaining life expectancy of the inactive participants is used instead of average remaining service period. Prior service cost or credit, which represents an increase or decrease in a plan's pension benefit obligation resulting from plan amendment, is amortized on a straight-line basis over the average expected remaining service period of active participants expected to benefit under the plan. If all or almost all of a plan's participants are inactive, the average remaining life expectancy of the inactive participants is used instead of average remaining service period.



MD&ACRITICAL ACCOUNTING POLICIES AND ESTIMATES


As of December 31, 2018, Duke Energy assumes pension and other post-retirement plan assets will generate a long-term rate of return of 6.85 percent. The expected long-term rate of return was developed using a weighted average calculation of expected returns based primarily on future expected returns across asset classes considering the use of active asset managers, where applicable. The asset allocation targets were set after considering the investment objective and the risk profile. Equity securities are held for their higher expected returns. Debt securities are primarily held to hedge the qualified pension liability. Real assets, return-seeking fixed income, hedge funds and other global securities are held for diversification. Investments within asset classes are diversified to achieve broad market participation and reduce the impact of individual managers on investments. 
Duke Energy discounted its future U.S. pension and other post-retirement obligations using a rate of 4.3 percent as of December 31, 2018. Discount rates used to measure benefit plan obligations for financial reporting purposes reflect rates at which pension benefits could be effectively settled. As of December 31, 2018, Duke Energy determined its discount rate for U.S. pension and other post-retirement obligations using a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected.
Future changes in plan asset returns, assumed discount rates and various other factors related to the participants in Duke Energy’s pension and post-retirement plans will impact future pension expense and liabilities. Duke Energy cannot predict with certainty what these factors will be in the future. The following table presents the approximate effect on Duke Energy’s 2018 pretax pension expense, pretax other post-retirement expense, pension obligation and other post-retirement benefit obligation if a 0.25 percent change in rates were to occur.
 Qualified and Non- Other Post-Retirement
 Qualified Pension Plans Plans
(in millions)0.25% (0.25)% 0.25% (0.25)%
Effect on 2018 pretax pension and other post-retirement expense       
Expected long-term rate of return$(22) $22
 $(1) $1
Discount rate(12) 12
 1
 (1)
Effect on pension and other post-retirement benefit obligation at December 31, 2018 
  
  
  
Discount rate(183) 188
 (13) 13
Duke Energy’s other post-retirement plan uses a health care cost trend rate covering both pre- and post-age 65 retired plan participants, which is comprised of a medical care cost trend rate, which reflects the near- and long-term expectation of increases in medical costs, and a prescription drug cost trend rate, which reflects the near- and long-term expectation of increases in prescription drug costs. As of December 31, 2018, the health care cost trend rate was 6.5 percent, trending down to 4.75 percent by 2024. The following table presents the approximate effect on Duke Energy’s 2018 pretax other post-retirement expense and other post-retirement benefit obligation if a 1 percentage point change in the health care cost trend rate were to occur. These plans are closed to new employees.
 Other Post-Retirement
 Plans
(in millions)1% (1)%
Effect on 2018 other post-retirement expense$1
 $(1)
Effect on other post-retirement benefit obligation at December 31, 201822
 (20)
For further information, see Note 22 to the Consolidated Financial Statements, “Employee Benefit Plans.”

LIQUIDITY AND CAPITAL RESOURCES
Sources and Uses of Cash
Duke Energy relies primarily upon cash flows from operations, debt and equity issuances and its existing cash and cash equivalents to fund its liquidity and capital requirements. Duke Energy’s capital requirements arise primarily from capital and investment expenditures, repaying long-term debt and paying dividends to shareholders.
Among other provisions, the Tax Act lowers the corporate federal income tax rate from 35 to 21 percent and eliminates bonus depreciation for regulated utilities. For Duke Energy’s regulated operations, the reduction in federal income taxes is expected to result in lower regulated customer rates. However, due to its existing NOL position and other tax credits, Duke Energy does not expect to be a significant federal cash tax payer through at least 2022. As a result, any reduction in customer rates could cause a material reduction in consolidated cash flows from operations in the short term. Over time, the reduction in deferred tax liabilities resulting from the Tax Act will increase Duke Energy’s regulated rate base investments and customer rates. Impacts of Tax Act to Duke Energy’s cash flows and credit metrics are subject to the regulatory actions of its state commissions and the FERC. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
The Subsidiary Registrants generally maintain minimal cash balances and use short-term borrowings to meet their working capital needs and other cash requirements. The Subsidiary Registrants, excluding Progress Energy (Parent), support their short-term borrowing needs through participation with Duke Energy and certain of its other subsidiaries in a money pool arrangement. The companies with short-term funds may provide short-term loans to affiliates participating under this arrangement. See Note 6 to the Consolidated Financial Statements, “Debt and Credit Facilities,” for additional discussion of the money pool arrangement.



MD&ALIQUIDITY AND CAPITAL RESOURCES


Duke Energy and the Subsidiary Registrants, excluding Progress Energy (Parent), may also use short-term debt, including commercial paper and the money pool, as a bridge to long-term debt financings. The levels of borrowing may vary significantly over the course of the year due to the timing of long-term debt financings and the impact of fluctuations in cash flows from operations. From time to time, Duke Energy’s current liabilities exceed current assets resulting from the use of short-term debt as a funding source to meet scheduled maturities of long-term debt, as well as cash needs, which can fluctuate due to the seasonality of its businesses.
Equity Issuance
In order to strengthen its balance sheet and credit metrics and bolster cash flows, Duke Energy plans to issue $500 million of common stock equity per year through 2023 through the DRIP and ATM programs. See Note 19 to the Consolidated Financial Statements, "Common Stock," for further information regarding Duke Energy's equity issuances in 2018.
Credit Facilities and Registration Statements
See Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding credit facilities and shelf registration statements available to Duke Energy and the Duke Energy Registrants.
CAPITAL EXPENDITURES
Duke Energy continues to focus on reducing risk and positioning its business for future success and will invest principally in its strongest business sectors. Duke Energy’s projected capital and investment expenditures, including debt AFUDC and capitalized interest, for the next three fiscal years are included in the table below.
(in millions)2019
2020
2021
New generation$375
$125
$220
Regulated renewables415
410
710
Environmental240
125
35
Nuclear fuel430
505
390
Major nuclear305
315
250
Customer additions505
480
475
Grid modernization and other transmission and distribution projects2,835
3,160
2,980
Maintenance and other3,395
2,605
2,390
Total Electric Utilities and Infrastructure8,500
7,725
7,450
Gas Utilities and Infrastructure1,675
2,000
1,600
Commercial Renewables and Other925
825
625
Total projected capital and investment expenditures$11,100
$10,550
$9,675
DEBT MATURITIES
See Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding significant components of Current Maturities of Long-Term Debt on the Consolidated Balance Sheets.
DIVIDEND PAYMENTS
In 2018, Duke Energy paid quarterly cash dividends for the 92nd consecutive year and expects to continue its policy of paying regular cash dividends in the future. There is no assurance as to the amount of future dividends because they depend on future earnings, capital requirements, financial condition and are subject to the discretion of the Board of Directors.
Duke Energy targets a dividend payout ratio of between 65 and 75 percent, based upon adjusted diluted EPS, and expects this trend to continue through 2023. In 2017 and 2018, Duke Energy increased the dividend by approximately 4 percent annually, and the company remains committed to continued growth of the dividend.
Dividend and Other Funding Restrictions of Duke Energy Subsidiaries
As discussed in Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” Duke Energy’s wholly owned public utility operating companies have restrictions on the amount of funds that can be transferred to Duke Energy through dividends, advances or loans as a result of conditions imposed by various regulators in conjunction with merger transactions. Duke Energy Progress and Duke Energy Florida also have restrictions imposed by their first mortgage bond indentures and Articles of Incorporation, which in certain circumstances, limit their ability to make cash dividends or distributions on common stock. Additionally, certain other Duke Energy subsidiaries have other restrictions, such as minimum working capital and tangible net worth requirements pursuant to debt and other agreements that limit the amount of funds that can be transferred to Duke Energy. At December 31, 2018, the amount of restricted net assets of wholly owned subsidiaries of Duke Energy that may not be distributed to Duke Energy in the form of a loan or dividend does not exceed a material amount of Duke Energy’s net assets. Duke Energy does not have any legal or other restrictions on paying common stock dividends to shareholders out of its consolidated equity accounts. Although these restrictions cap the amount of funding the various operating subsidiaries can provide to Duke Energy, management does not believe these restrictions will have a significant impact on Duke Energy’s ability to access cash to meet its payment of dividends on common stock and other future funding obligations.



MD&ALIQUIDITY AND CAPITAL RESOURCES


CASH FLOWS FROM OPERATING ACTIVITIES
Cash flows from operations of Electric Utilities and Infrastructure and Gas Utilities and Infrastructure are primarily driven by sales of electricity and natural gas, respectively, and costs of operations. These cash flows from operations are relatively stable and comprise a substantial portion of Duke Energy’s operating cash flows. Weather conditions, working capital and commodity price fluctuations and unanticipated expenses including unplanned plant outages, storms, legal costs and related settlements can affect the timing and level of cash flows from operations.
Duke Energy believes it has sufficient liquidity resources through the commercial paper markets, and ultimately, the Master Credit Facility, to support these operations. Cash flows from operations are subject to a number of other factors, including, but not limited to, regulatory constraints, economic trends and market volatility (see Item 1A, “Risk Factors,” for additional information).
At December 31, 2018, Duke Energy had cash and cash equivalents and short-term investments of $442 million.
DEBT ISSUANCES
Depending on availability based on the issuing entity, the credit rating of the issuing entity, and market conditions, the Subsidiary Registrants prefer to issue first mortgage bonds and secured debt, followed by unsecured debt. This preference is the result of generally higher credit ratings for first mortgage bonds and secured debt, which typically result in lower interest costs. Duke Energy Corporation primarily issues unsecured debt.
In 2019, Duke Energy anticipates issuing additional debt of $7.5 billion, primarily for the purpose of funding capital expenditures and debt maturities. See to Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding significant debt issuances in 2018.
Duke Energy’s capitalization is balanced between debt and equity as shown in the table below.
 Projected 2019
 Actual 2018
 Actual 2017
Equity44% 43% 43%
Debt56% 57% 57%
Restrictive Debt Covenants
Duke Energy’s debt and credit agreements contain various financial and other covenants. Duke Energy's Master Credit Facility contains a covenant requiring the debt-to-total capitalization ratio to not exceed 65 percent for each borrower, excluding Piedmont, and 70 percent for Piedmont. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements or sublimits thereto. As of December 31, 2018, each of the Duke Energy Registrants was in compliance with all covenants related to their debt agreements. In addition, some credit agreements may allow for acceleration of payments or termination of the agreements due to nonpayment, or acceleration of other significant indebtedness of the borrower or some of its subsidiaries. None of the debt or credit agreements contain material adverse change clauses.



MD&ALIQUIDITY AND CAPITAL RESOURCES


Credit Ratings
Moody’s, S&P and Fitch Ratings, Inc. provide credit ratings for various Duke Energy Registrants. The following table includes Duke Energy and certain subsidiaries’ credit ratings and ratings outlook as of February 2019.
Moody'sS&PFitch
Duke Energy CorporationStableStableStable
Issuer Credit RatingBaa1A-BBB+
Senior Unsecured DebtBaa1BBB+BBB+
Commercial PaperP-2A-2F-2
Duke Energy CarolinasStableStableN/A
Senior Secured DebtAa2AN/A
Senior Unsecured DebtA1A-N/A
Progress EnergyStableStableN/A
Senior Unsecured DebtBaa1BBB+N/A
Duke Energy ProgressStableStableN/A
Senior Secured DebtAa3AN/A
Duke Energy FloridaStableStableN/A
Senior Secured DebtA1AN/A
Senior Unsecured DebtA3A-N/A
Duke Energy OhioStableStableN/A
Senior Secured DebtA2AN/A
Senior Unsecured DebtBaa1A-N/A
Duke Energy IndianaStableStableN/A
Senior Secured DebtAa3AN/A
Senior Unsecured DebtA2A-N/A
Duke Energy KentuckyStableStableN/A
Senior Unsecured DebtBaa1A-N/A
Piedmont Natural GasStableStableN/A
Senior UnsecuredA3A-N/A
Credit ratings are intended to provide credit lenders a framework for comparing the credit quality of securities and are not a recommendation to buy, sell or hold. The Duke Energy Registrants’ credit ratings are dependent on the rating agencies’ assessments of their ability to meet their debt principal and interest obligations when they come due. If, as a result of market conditions or other factors, the Duke Energy Registrants are unable to maintain current balance sheet strength, or if earnings and cash flow outlook materially deteriorates, credit ratings could be negatively impacted.
Cash Flow Information
The following table summarizes Duke Energy’s cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
(in millions)2018
 2017
 2016
Cash flows provided by (used in):     
Operating activities$7,186
 $6,624
 $6,863
Investing activities(10,060) (8,442) (11,528)
Financing activities2,960
 1,782
 4,251
Changes in cash and cash equivalents included in assets held for sale
 
 474
Net increase (decrease) in cash, cash equivalents and restricted cash86
 (36) 60
Cash, cash equivalents and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents and restricted cash at end of period$591
 $505
 $541



MD&ALIQUIDITY AND CAPITAL RESOURCES


OPERATING CASH FLOWS
The following table summarizes key components of Duke Energy’s operating cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018

2017
 2017

2016
 2016
Net income$2,644
 $3,064
 $(420) $2,170
 $894
Non-cash adjustments to net income6,484
 5,380
 1,104
 5,305
 75
Contributions to qualified pension plans(141) (19) (122) (155) 136
Payments for AROs(533) (571) 38
 (608) 37
Payment for disposal of other assets(105) 
 (105) 
 
Working capital(1,163) (1,230) 67
 151
 (1,381)
Net cash provided by operating activities$7,186

$6,624
 $562

$6,863
 $(239)
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $684 million increase in net income after adjustment for non-cash items primarily due to favorable weather and increased pricing and volumes in the current period; and
a $38 million decrease in payments to AROs.
Offset by:
a $122 million increase in contributions to qualified pension plans; and
a $105 million payment for disposal of Beckjord.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $1,381 million decrease in working capital due to weather, payment of merger transaction and integration related costs and increased property tax payments in 2017.
Offset by:
a $969 million increase in net income after non-cash adjustments primarily due to the inclusion of Piedmont's earnings for a full year, favorable pricing and weather-normal retail volumes driven by the residential class in the Electric Utilities and Infrastructure segment combined with continued strong cost control;
a $136 million decrease in contributions to qualified pension plans; and
a $37 million decrease in payments to AROs.
INVESTING CASH FLOWS
The following table summarizes key components of Duke Energy’s investing cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018

2017
 2017

2016
 2016
Capital, investment and acquisition expenditures$(9,668) $(8,198) $(1,470) $(13,215) $5,017
Debt and equity securities, net(15) 27
 (42) 83
 (56)
Net proceeds from the sales of discontinued operations and other assets, net of cash divested41
 
 41
 1,418
 (1,418)
Other investing items(418) (271) (147) 186
 (457)
Net cash used in investing activities$(10,060)
$(8,442) $(1,618)
$(11,528) $3,086



MD&ALIQUIDITY AND CAPITAL RESOURCES


The primary use of cash related to investing activities is capital, investment and acquisition expenditures, detailed by reportable business segment in the following table.
 Years Ended December 31,
(in millions)2018

2017

2016
Electric Utilities and Infrastructure$8,086
 $7,024
 $6,649
Gas Utilities and Infrastructure1,133
 907
 5,519
Commercial Renewables193
 92
 857
Other256
 175
 190
Total capital, investment and acquisition expenditures$9,668

$8,198

$13,215
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $1,470 million increase in capital, investment and acquisition expenditures in all reportable business segments, including expenditures related to W.S. Lee CC, Asheville and Citrus County CC at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $5,017 million decrease in capital, investment and acquisition expenditures mainly due to the Piedmont acquisition in the prior year.
Partially offset by:
a $1,418 million decrease in net proceeds from sales of discontinued operations due to the prior year sale of the International business.
FINANCING CASH FLOWS
The following table summarizes key components of Duke Energy’s financing cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018
 2017
 2017
 2016
 2016
Issuance of common stock$1,838
 $
 $1,838
 $731
 $(731)
Issuances of long-term debt, net2,393
 4,593
 (2,200) 7,315
 (2,722)
Notes payable and commercial paper1,171
 (362) 1,533
 (1,447) 1,085
Dividends paid(2,471) (2,450) (21) (2,332) (118)
Other financing items29
 1
 28
 (16) 17
Net cash provided by financing activities$2,960
 $1,782
 $1,178
 $4,251
 $(2,469)
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $1,838 million increase in proceeds from the issuance of common stock; and
a $1,533 million increase in net borrowings from notes payable and commercial paper primarily due to increased funding requirements for capital expenditures and storm costs.
Partially offset by:
a $2,200 million net decrease in proceeds from issuances of long-term debt primarily due to timing related to refinancing of existing maturities, fund growth and general corporate needs.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $2,722 million net decrease in proceeds from issuances of long-term debt driven principally by the prior year $3,750 million of senior unsecured notes used to fund a portion of the Piedmont acquisition, offset primarily by $900 million of first mortgage bonds issued by Duke Energy Florida in the current year to fund capital expenditures for ongoing construction and capital maintenance and for general corporate purposes;
a $731 million decrease in proceeds from stock issuances used to fund a portion of the Piedmont acquisition in 2016; and
a $118 million current year increase in dividends paid.
Partially offset by:
a $1,085 million decrease in net borrowings from notes payable and commercial paper primarily due to the use of proceeds from $1,294 million nuclear asset-recovery bonds issued at Duke Energy Florida in 2016 to pay down outstanding commercial paper.



MD&AOFF-BALANCE SHEET ARRANGEMENTS AND CONTRACTUAL OBLIGATIONS


Off-Balance Sheet Arrangements
Duke Energy and certain of its subsidiaries enter into guarantee arrangements in the normal course of business to facilitate commercial transactions with third parties. These arrangements include performance guarantees, standby letters of credit, debt guarantees, surety bonds and indemnifications.
Most of the guarantee arrangements entered into by Duke Energy enhance the credit standing of certain subsidiaries, non-consolidated entities or less than wholly owned entities, enabling them to conduct business. As such, these guarantee arrangements involve elements of performance and credit risk, which are not always included on the Consolidated Balance Sheets. The possibility of Duke Energy, either on its own or on behalf of Spectra Energy Capital, LLC (Spectra Capital) through indemnification agreements entered into as part of the January 2, 2007, spin-off of Spectra Energy Corp, having to honor its contingencies is largely dependent upon the future operations of the subsidiaries, investees and other third parties, or the occurrence of certain future events.
Duke Energy performs ongoing assessments of its respective guarantee obligations to determine whether any liabilities have been incurred as a result of potential increased non-performance risk by third parties for which Duke Energy has issued guarantees. See Note 7 to the Consolidated Financial Statements, “Guarantees and Indemnifications,” for further details of the guarantee arrangements. Issuance of these guarantee arrangements is not required for the majority of Duke Energy’s operations. Thus, if Duke Energy discontinued issuing these guarantees, there would not be a material impact to the consolidated results of operations, cash flows or financial position.
Other than the guarantee arrangements discussed above, normal operating lease arrangements and off-balance sheet debt related to non-consolidated VIEs, Duke Energy does not have any material off-balance sheet financing entities or structures. For additional information, see Notes 5 and 17 to the Consolidated Financial Statements, “Commitments and Contingencies" and "Variable Interest Entities," respectively.
Contractual Obligations
Duke Energy enters into contracts that require payment of cash at certain specified periods, based on certain specified minimum quantities and prices. The following table summarizes Duke Energy’s contractual cash obligations as of December 31, 2018.
 Payments Due By Period
         More than
   Less than
 2-3 years
 4-5 years
 5 years
   1 year
 (2020 &
 (2022 &
 (2024 &
(in millions)Total
 (2019)
 2021)
 2023)
 beyond)
Long-term debt(a)
$52,446
 $3,291
 $8,311
 $5,861
 $34,983
Interest payments on long-term debt(b)
32,834
 2,121
 3,823
 3,329
 23,561
Capital leases(c)
1,428
 170
 351
 330
 577
Operating leases(c)
1,991
 239
 405
 330
 1,017
Purchase obligations:(d)
 
  
  
  
  
Fuel and purchased power(e)(f)
20,496
 4,329
 5,315
 3,153
 7,699
Other purchase obligations(g)
12,436
 4,617
 1,178
 775
 5,866
Nuclear decommissioning trust annual funding(h)
482
 24
 48
 48
 362
Land easements(i)
234
 10
 20
 20
 184
Total contractual cash obligations(j)(k)
$122,347
 $14,801
 $19,451
 $13,846
 $74,249
(a)See Note 6 to the Consolidated Financial Statements, “Debt and Credit Facilities.”
(b)Interest payments on variable rate debt instruments were calculated using December 31, 2018, interest rates and holding them constant for the life of the instruments.
(c)See Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies.” Amounts in the table above include the interest component of capital leases based on the interest rates stated in the lease agreements and exclude certain related executory costs. Amounts exclude contingent lease obligations.
(d)Current liabilities, except for current maturities of long-term debt, and purchase obligations reflected on the Consolidated Balance Sheets have been excluded from the above table.
(e)Includes firm capacity payments that provide Duke Energy with uninterrupted firm access to electricity transmission capacity and natural gas transportation contracts, as well as undesignated contracts and contracts that qualify as NPNS. For contracts where the price paid is based on an index, the amount is based on market prices at December 31, 2018, or the best projections of the index. For certain of these amounts, Duke Energy may settle on a net cash basis since Duke Energy has entered into payment netting arrangements with counterparties that permit Duke Energy to offset receivables and payables with such counterparties.
(f)Amounts exclude obligations under the OVEC purchase power agreement. See Note 17 to the Consolidated Financial Statements, "Variable Interest Entities," for additional information.
(g)Includes contracts for software, telephone, data and consulting or advisory services. Amount also includes contractual obligations for EPC costs for new generation plants, wind and solar facilities, plant refurbishments, maintenance and day-to-day contract work and commitments to buy certain products. Amount excludes certain open purchase orders for services that are provided on demand, for which the timing of the purchase cannot be determined.
(h)Related to future annual funding obligations to NDTF through nuclear power stations' relicensing dates. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations."
(i)Related to Commercial Renewables wind and solar facilities.



MD&AOFF-BALANCE SHEET ARRANGEMENTS AND CONTRACTUAL OBLIGATIONS


(j)Unrecognized tax benefits of $24 million are not reflected in this table as Duke Energy cannot predict when open income tax years will close with completed examinations. See Note 23 to the Consolidated Financial Statements, "Income Taxes."
(k)The table above excludes reserves for litigation, environmental remediation, asbestos-related injuries and damages claims and self-insurance claims (see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies”) because Duke Energy is uncertain as to the timing and amount of cash payments that will be required. Additionally, the table above excludes annual insurance premiums that are necessary to operate the business, including nuclear insurance (see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies”), funding of pension and other post-retirement benefit plans (see Note 22 to the Consolidated Financial Statements, "Employee Benefit Plans"), AROs, including ash management expenditures (see Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations") and regulatory liabilities (see Note 4 to the Consolidated Financial Statements, “Regulatory Matters”) because the amount and timing of the cash payments are uncertain. Also excluded are Deferred Income Taxes and ITCs recorded on the Consolidated Balance Sheets since cash payments for income taxes are determined based primarily on taxable income for each discrete fiscal year.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Risk Management Policies
The Enterprise Risk Management policy framework at Duke Energy includes strategy, operational, project execution and financial or transaction related risks. Enterprise Risk Management includes market risk as part of the financial and transaction related risks in its framework.
Duke Energy is exposed to market risks associated with commodity prices, interest rates and equity prices. Duke Energy has established comprehensive risk management policies to monitor and manage these market risks. Duke Energy’s Chief Executive Officer and Chief Financial Officer are responsible for the overall approval of market risk management policies and the delegation of approval and authorization levels. The Finance and Risk Management Committee of the Board of Directors receives periodic updates from the Chief Risk Officer and other members of management on market risk positions, corporate exposures and overall risk management activities. The Chief Risk Officer is responsible for the overall governance of managing commodity price risk, including monitoring exposure limits.
The following disclosures about market risk contain forward-looking statements that involve estimates, projections, goals, forecasts, assumptions, risks and uncertainties that could cause actual results or outcomes to differ materially from those expressed in the forward-looking statements. See Item 1A, “Risk Factors,” and “Cautionary Statement Regarding Forward-Looking Information” for a discussion of the factors that may impact any such forward-looking statements made herein.
Commodity Price Risk
Duke Energy is exposed to the impact of market fluctuations in the prices of electricity, coal, natural gas and other energy-related products marketed and purchased as a result of its ownership of energy-related assets. Duke Energy’s exposure to these fluctuations is limited by the cost-based regulation of its regulated operations as these operations are typically allowed to recover substantially all of these costs through various cost-recovery clauses, including fuel clauses, formula based contracts, or other cost-sharing mechanisms. While there may be a delay in timing between when these costs are incurred and when they are recovered through rates, changes from year to year generally do not have a material impact on operating results of these regulated operations.
Price risk represents the potential risk of loss from adverse changes in the market price of electricity or other energy commodities. Duke Energy’s exposure to commodity price risk is influenced by a number of factors, including contract size, length, market liquidity, location and unique or specific contract terms. Duke Energy employs established policies and procedures to manage risks associated with these market fluctuations, which may include using various commodity derivatives, such as swaps, futures, forwards and options. For additional information, see Note 14 to the Consolidated Financial Statements, “Derivatives and Hedging.”
The inputs and methodologies used to determine the fair value of contracts are validated by an internal group separate from Duke Energy’s deal origination function. While Duke Energy uses common industry practices to develop its valuation techniques, changes in its pricing methodologies or the underlying assumptions could result in significantly different fair values and income recognition.
Hedging Strategies
Duke Energy closely monitors risks associated with commodity price changes on its future operations and, where appropriate, uses various commodity instruments such as electricity, coal and natural gas forward contracts and options to mitigate the effect of such fluctuations on operations. Duke Energy’s primary use of energy commodity derivatives is to hedge against exposure to the prices of power, fuel for generation and natural gas for customers.
The majority of instruments used to manage Duke Energy’s commodity price exposure are either not designated as hedges or do not qualify for hedge accounting. These instruments are referred to as undesignated contracts. Mark-to-market changes for undesignated contracts entered into by regulated businesses are reflected as regulatory assets or liabilities on the Consolidated Balance Sheets. Undesignated contracts entered into by unregulated businesses are marked-to-market each period, with changes in the fair value of the derivative instruments reflected in earnings.
Duke Energy may also enter into other contracts that qualify for the NPNS exception. When a contract meets the criteria to qualify as NPNS, Duke Energy applies such exception. Income recognition and realization related to NPNS contracts generally coincide with the physical delivery of the commodity. For contracts qualifying for the NPNS exception, no recognition of the contract’s fair value in the Consolidated Financial Statements is required until settlement of the contract as long as the transaction remains probable of occurring.



MD&AQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK


Generation Portfolio Risks 
The Duke Energy Registrants optimize the value of their generation portfolios, which include generation assets, fuel and emission allowances. Modeled forecasts of future generation output and fuel requirements are based on forward power and fuel markets. The component pieces of the portfolio are bought and sold based on models and forecasts of generation in order to manage the economic value of the portfolio in accordance with the strategies of the business units.
For the Electric Utilities and Infrastructure segment, the generation portfolio not utilized to serve retail operations or committed load is subject to commodity price fluctuations. However, the impact on the Consolidated Statements of Operations is partially offset by mechanisms in these regulated jurisdictions that result in the sharing of net profits from these activities with retail customers.
Interest Rate Risk
Duke Energy is exposed to risk resulting from changes in interest rates as a result of its issuance or anticipated issuance of variable and fixed-rate debt and commercial paper. Duke Energy manages interest rate exposure by limiting variable-rate exposures to a percentage of total debt and by monitoring the effects of market changes in interest rates. Duke Energy also enters into financial derivative instruments, which may include instruments such as, but not limited to, interest rate swaps, swaptions and U.S. Treasury lock agreements to manage and mitigate interest rate risk exposure. See Notes 1, 6, 14 and 16 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” “Debt and Credit Facilities,” “Derivatives and Hedging,” and “Fair Value Measurements.”
At December 31, 2018, Duke Energy had $1.2 billion of U.S. treasury lock agreements, $644 million notional amount of floating-to-fixed swaps outstanding, $500 million notional amount of fixed-to-floating swaps outstanding and $300 million forward-starting swaps outstanding. Duke Energy had $8.0 billion of unhedged long- and short-term floating interest rate exposure at December 31, 2018. The impact of a 100 basis point change in interest rates on pretax income is approximately $80 million at December 31, 2018. This amount was estimated by considering the impact of the hypothetical interest rates on variable-rate securities outstanding, adjusted for interest rate hedges as of December 31, 2018.
See Note 14, "Derivatives and Hedging," to the Consolidated Financial Statements for additional information about the forward-starting interest rate swaps related to the Piedmont acquisition.
Credit Risk
Credit risk represents the loss that the Duke Energy Registrants would incur if a counterparty fails to perform under its contractual obligations. Where exposed to credit risk, the Duke Energy Registrants analyze the counterparty's financial condition prior to entering into an agreement and monitor exposure on an ongoing basis. The Duke Energy Registrants establish credit limits where appropriate in the context of contractual arrangements and monitor such limits.
To reduce credit exposure, the Duke Energy Registrants seek to include netting provisions with counterparties, which permit the offset of receivables and payables with such counterparties. The Duke Energy Registrants also frequently use master agreements with credit support annexes to further mitigate certain credit exposures. The master agreements provide for a counterparty to post cash or letters of credit to the exposed party for exposure in excess of an established threshold. The threshold amount represents a negotiated unsecured credit limit for each party to the agreement, determined in accordance with the Duke Energy Registrants’ internal corporate credit practices and standards. Collateral agreements generally also provide that the inability to post collateral is sufficient cause to terminate contracts and liquidate all positions.
The Duke Energy Registrants also obtain cash or letters of credit from certain counterparties to provide credit support outside of collateral agreements, where appropriate, based on a financial analysis of the counterparty and the regulatory or contractual terms and conditions applicable to each transaction. See Note 14 to the Consolidated Financial Statements, “Derivatives and Hedging,” for additional information regarding credit risk related to derivative instruments.
The Duke Energy Registrants’ principal counterparties for its electric and natural gas businesses are regional transmission organizations, distribution companies, municipalities, electric cooperatives and utilities located throughout the U.S. The Duke Energy Registrants have concentrations of receivables from such entities throughout these regions. These concentrations of receivables may affect the Duke Energy Registrants’ overall credit risk in that risk factors can negatively impact the credit quality of the entire sector.
The Duke Energy Registrants are also subject to credit risk from transactions with their suppliers that involve prepayments in conjunction with outsourcing arrangements, major construction projects and certain commodity purchases. The Duke Energy Registrants’ credit exposure to such suppliers may take the form of increased costs or project delays in the event of non-performance. The Duke Energy Registrants' frequently require guarantees or letters of credit from suppliers to mitigate this credit risk.
Credit risk associated with the Duke Energy Registrants’ service to residential, commercial and industrial customers is generally limited to outstanding accounts receivable. The Duke Energy Registrants mitigate this credit risk by requiring customers to provide a cash deposit, letter of credit or surety bond until a satisfactory payment history is established, subject to the rules and regulations in effect in each retail jurisdiction, at which time the deposit is typically refunded. Charge-offs for retail customers have historically been insignificant to the operations of the Duke Energy Registrants and are typically recovered through retail rates. Management continually monitors customer charge-offs and payment patterns to ensure the adequacy of bad debt reserves. Duke Energy Ohio and Duke Energy Indiana sell certain of their accounts receivable and related collections through CRC, a Duke Energy consolidated variable interest entity. Losses on collection are first absorbed by the equity of CRC and next by the subordinated retained interests held by Duke Energy Ohio, Duke Energy Kentucky and Duke Energy Indiana. See Note 17 to the Consolidated Financial Statements, “Variable Interest Entities.” Duke Energy also provides certain non-tariff services, primarily to large commercial and industrial customers, in which incurred costs are intended to be recovered from the individual customer and therefore are not subject to rate recovery in the event of customer default. Customer credit worthiness is assessed prior to entering into these transactions.



MD&AQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK


Duke Energy’s Commercial Renewables business segment enters into long-term agreements with certain creditworthy buyers that may not include the right to call for collateral in the event of a credit rating downgrade, and is therefore exposed to market price risk and credit risk related to these agreements. Credit concentration exists to certain counterparties on these agreements.
Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. See Note 5 to the Consolidated Financial Statements, "Commitments and Contingencies" for information on asbestos-related injuries and damages claims.
The Duke Energy Registrants also have credit risk exposure through issuance of performance and financial guarantees, letters of credit and surety bonds on behalf of less than wholly owned entities and third parties. Where the Duke Energy Registrants have issued these guarantees, it is possible that they could be required to perform under these guarantee obligations in the event the obligor under the guarantee fails to perform. Where the Duke Energy Registrants have issued guarantees related to assets or operations that have been disposed of via sale, they attempt to secure indemnification from the buyer against all future performance obligations under the guarantees. See Note 7 to the Consolidated Financial Statements, “Guarantees and Indemnifications,” for further information on guarantees issued by the Duke Energy Registrants.
Based on the Duke Energy Registrants’ policies for managing credit risk, their exposures and their credit and other reserves, the Duke Energy Registrants do not currently anticipate a materially adverse effect on their consolidated financial position or results of operations as a result of non-performance by any counterparty.
Marketable Securities Price Risk
As described further in Note 15 to the Consolidated Financial Statements, “Investments in Debt and Equity Securities,” Duke Energy invests in debt and equity securities as part of various investment portfolios to fund certain obligations. The vast majority of investments in equity securities are within the NDTF and assets of the various pension and other post-retirement benefit plans.
Pension Plan Assets
Duke Energy maintains investments to facilitate funding the costs of providing non-contributory defined benefit retirement and other post-retirement benefit plans. These investments are exposed to price fluctuations in equity markets and changes in interest rates. The equity securities held in these pension plans are diversified to achieve broad market participation and reduce the impact of any single investment, sector or geographic region. Duke Energy has established asset allocation targets for its pension plan holdings, which take into consideration the investment objectives and the risk profile with respect to the trust in which the assets are held. See Note 22 to the Consolidated Financial Statements, “Employee Benefit Plans,” for additional information regarding investment strategy of pension plan assets.
A significant decline in the value of plan asset holdings could require Duke Energy to increase funding of its pension plans in future periods, which could adversely affect cash flows in those periods. Additionally, a decline in the fair value of plan assets, absent additional cash contributions to the plan, could increase the amount of pension cost required to be recorded in future periods, which could adversely affect Duke Energy’s results of operations in those periods.
Nuclear Decommissioning Trust Funds
As required by the NRC, NCUC, PSCSC and FPSC, subsidiaries of Duke Energy maintain trust funds to fund the costs of nuclear decommissioning. As of December 31, 2018, these funds were invested primarily in domestic and international equity securities, debt securities, cash and cash equivalents and short-term investments. Per the NRC, Internal Revenue Code, NCUC, PSCSC and FPSC requirements, these funds may be used only for activities related to nuclear decommissioning. These investments are exposed to price fluctuations in equity markets and changes in interest rates. Duke Energy actively monitors its portfolios by benchmarking the performance of its investments against certain indices and by maintaining, and periodically reviewing, target allocation percentages for various asset classes.
Accounting for nuclear decommissioning recognizes that costs are recovered through retail and wholesale rates; therefore, fluctuations in investment prices do not materially affect the Consolidated Statements of Operations, as changes in the fair value of these investments are primarily deferred as regulatory assets or regulatory liabilities pursuant to Orders by the NCUC, PSCSC, FPSC and FERC. Earnings or losses of the fund will ultimately impact the amount of costs recovered through retail and wholesale rates. See Note 9 to the Consolidated Financial Statements, “Asset Retirement Obligations,” for additional information regarding nuclear decommissioning costs. See Note 15 to the Consolidated Financial Statements, “Investments in Debt and Equity Securities,” for additional information regarding NDTF assets.
OTHER MATTERS
Environmental Regulations
The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. These regulations can be changed from time to time and result in new obligations of the Duke Energy Registrants.
The following sections outline various proposed and recently enacted legislation and regulations that may impact the Duke Energy Registrants. Refer to Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for further information regarding potential plant retirements and regulatory filings related to the Duke Energy Registrants.



MD&AOTHER MATTERS


Coal Combustion Residuals
In April 2015, EPA published a rule to regulate the disposal of CCR from electric utilities as solid waste. The federal regulation classifies CCR as nonhazardous waste and allows for beneficial use of CCR with some restrictions. The regulation applies to all new and existing landfills, new and existing surface impoundments receiving CCR and existing surface impoundments that are no longer receiving CCR but contain liquid located at stations currently generating electricity (regardless of fuel source). The rule establishes requirements regarding landfill design, structural integrity design and assessment criteria for surface impoundments, groundwater monitoring, protection and remedial procedures and other operational and reporting procedures to ensure the safe disposal and management of CCR. Various industry and environmental parties have appealed EPA's CCR rule in the D.C. Circuit Court. On April 18, 2016, EPA filed a motion with the federal court to settle five issues raised in litigation. On June 14, 2016, the court approved the motion with respect to all of those issues. Duke Energy does not expect a material impact from the settlement or that it will result in additional ARO adjustments. On September 13, 2017, EPA responded to a petition by the Utility Solid Waste Activities Group that the agency would reconsider certain provisions of the final rule, and asked the D.C. Circuit Court to suspend the litigation. The D.C. Circuit Court denied EPA’s petition to suspend the litigation and oral argument was held on November 20, 2017. On August 21, 2018, the D.C. Circuit issued its decision in the CCR rule litigation denying relief for industry petitioners' remaining claims and ruling in favor of environmental petitioners on a number of their challenges, including the regulation of inactive CCR surface impoundments at retired plants and the continued operation of unlined impoundments.
On March 15, 2018, EPA published proposed amendments to the federal CCR rule, including revisions that were required as part of a CCR litigation settlement, as well as changes that the agency considers warranted due to the passage of the Water Infrastructure Improvements for the Nation Act, which provides statutory authority for state and federal permit programs. On July 17, 2018, EPA issued a rule (Phase 1, Part 1) finalizing certain, but not all, elements included in the agency's March 15, 2018, proposal. The final rule revises certain closure deadlines and groundwater protection standards in the CCR rule. It does not change the primary requirements for groundwater monitoring, corrective action, inspections and maintenance, and closure, and thus does not materially affect Duke Energy’s coal ash basin closure plans or compliance obligations under the CCR rule. On October 22, 2018, a coalition of environmental groups filed a petition for review in the D.C. Circuit Court challenging EPA's final Phase 1, Part 1 revisions to the CCR rule. Briefing in the case concluded in February 2019.
In addition to the requirements of the federal CCR regulation, CCR landfills and surface impoundments will continue to be independently regulated by most states. Cost recovery for future expenditures will be pursued through the normal ratemaking process with federal and state utility commissions and via wholesale contracts, which permit recovery of necessary and prudently incurred costs associated with Duke Energy’s regulated operations. For more information, see Notes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and "Asset Retirement Obligations," respectively.
Coal Ash Management Act of 2014
AROs recorded on the Duke Energy Carolinas and Duke Energy Progress Consolidated Balance Sheets at December 31, 2018, and December 31, 2017, include the legal obligation for closure of coal ash basins and the disposal of related ash as a result of the Coal Ash Act, the EPA CCR rule and other agreements. The Coal Ash Act includes a variance procedure for compliance deadlines and other issues surrounding the management of CCR and CCR surface impoundments and prohibits cost recovery in customer rates for unlawful discharge of ash impoundment waters occurring after January 1, 2014. The Coal Ash Act leaves the decision on cost recovery determinations related to closure of ash impoundments to the normal ratemaking processes before utility regulatory commissions.
Consistent with the requirements of the Coal Ash Act, Duke Energy has submitted comprehensive site assessments and groundwater corrective plans to NCDEQ and will submit to NCDEQ site-specific coal ash impoundment closure plans in advance of closure. In support of these closure plans, on November 15, 2018, Duke Energy submitted options analyses, groundwater modeling and net environmental benefits analyses for six sites potentially eligible for closure by cap in place. Separately, on November 16, 2018, Duke Energy submitted a variance application requesting that NCDEQ grant a six-month extension to the closure deadline applicable to the CCR surface impoundments at the Sutton Plant. NCDEQ held a public meeting on January 14, 2019 at which it announced that an extension would be appropriate. A final decision on the variance application is expected by April 15, 2019.



MD&AOTHER MATTERS


The current plans for each site are listed in the table below.
NCDEQ Risk ClassificationPlants/Current Closure DateExpected Closure Method
Low
Allen – December 31, 2029(a)
Belews Creek – December 31, 2029(a)
Buck – December 31, 2029(a)(b)
Rogers – December 31, 2029(a)
Marshall – December 31, 2029(a)
Mayo – December 31, 2029(a)
Roxboro – December 31, 2029(a)
Combination of a cap system and a groundwater monitoring system, or for selected sites, conversion for beneficial use.
Medium
H.F. Lee – December 31, 2029(b)
Cape Fear – December 31, 2029(b)
Weatherspoon – August 1, 2028
Excavation, which may include conversion of the basin to a lined industrial landfill, transferring coal ash to an engineered landfill, or for selected sites, conversion for beneficial use.
High
Sutton – August 1, 2019
Riverbend – August 1, 2019
Dan River – August 1, 2019
Asheville – August 1, 2022
Excavation, which may include a combination of transferring coal ash to an engineered landfill or for selected sites, conversion for beneficial use.
(a)In November 2018, the closure deadline for these basins was extended to December 31, 2029 as a result of the completion of certain dam improvement projects and alternative drinking water source projects by October 15, 2018.
(b)The Coal Ash Act requires the installation and operation of three large-scale coal ash beneficiation projects to produce reprocessed ash for use in the concrete industry. Duke Energy has selected the Buck, H.F. Lee and Cape Fear plants for these projects. Closure at these sites is required to be completed no later than December 31, 2029.
For further information on ash basins and recovery, see Notes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and “Asset Retirement Obligations,” respectively.
Estimated Cost and Impacts of Rulemakings
Duke Energy will incur capital expenditures to comply with the environmental regulations and rules discussed above. The following table, as of December 31, 2018, provides five-year estimated costs, excluding AFUDC, of new control equipment that may need to be installed on existing power plants primarily to comply with the Coal Ash Act requirements for conversion to dry disposal of bottom ash and fly ash, CWA 316(b) and ELGs through December 31, 2023. The table excludes ash basin closure costs recorded in Asset retirement obligations on the Consolidated Balance Sheets. For more information related to AROs, see Note 9 to the Consolidated Financial Statements.
(in millions)Five-Year Estimated Costs
Duke Energy$420
Duke Energy Carolinas185
Progress Energy200
Duke Energy Progress80
Duke Energy Florida120
Duke Energy Ohio15
Duke Energy Indiana20
The Duke Energy Registrants also expect to incur increased fuel, purchased power, operation and maintenance and other expenses, in addition to costs for replacement generation for potential coal-fired power plant retirements, as a result of these regulations. Actual compliance costs incurred may be materially different from these estimates due to reasons such as the timing and requirements of EPA regulations and the resolution of legal challenges to the rules. The Duke Energy Registrants intend to seek rate recovery of necessary and prudently incurred costs associated with regulated operations to comply with these regulations.
Other Environmental Regulations
The Duke Energy Registrants are also subject to various federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters, including the following:
Clean Water Act
Steam Effluent Limitation Guidelines
Cross-State Air Pollution Rule
Carbon Pollution Standards for New, Modified and Reconstructed Power Plants
Clean Power Plan/ACE Rule
Duke Energy continues to comply with enacted environmental laws and regulations even as certain of these regulations are in various stages of clarification, revision or legal challenges. The Duke Energy Registrants cannot predict the outcome of these matters.



MD&AOTHER MATTERS


Section 126 Petitions
On November 16, 2016, the state of Maryland filed a petition with EPA under Section 126 of the Clean Air Act alleging that 19 power plants, including two plants (three units) that Duke Energy Registrants own and operate, contribute to violations of EPA’s NAAQS for ozone in the state of Maryland. On March 12, 2018, the state of New York filed a petition with EPA, also under Section 126 of the Clean Air Act alleging that over 60 power plants, including four that Duke Energy Registrants own and operate, contribute to violations of EPA’s ozone NAAQS in the state of New York. Both Maryland and New York seek EPA orders requiring the states in which the named power plants operate impose more stringent NOx emission limitations on the plants. On October 5, 2018, EPA published a final rule denying the Maryland petition. That same day, Maryland appealed EPA's denial of their Section 126 petition to the D.C. Circuit Court. The impact of these petitions could be more stringent requirements for the operation of NOx emission controls at these plants. The Duke Energy Registrants cannot predict the outcome of these matters.
Global Climate Change
The Duke Energy Registrants’ GHG emissions consist primarily of CO2 and result primarily from operating a fleet of coal-fired and natural gas-fired power plants. In 2018, the Duke Energy Registrants’ power plants emitted approximately 105 million tons of CO2. Future levels of CO2 emissions will be influenced by variables that include fuel prices, compliance with new or existing regulations, economic conditions that affect electricity demand and the technologies deployed to generate the electricity necessary to meet the customer demand.
The Duke Energy Registrants have taken actions that have resulted in a reduction of CO2 emissions over time. Actions have included the retirement of 47 coal-fired EGUs with a combined generating capacity of 5,425 MW. Much of that capacity has been replaced with state-of-the-art highly efficient natural gas-fired generation that produces far fewer CO2 emissions per unit of electricity generated. Duke Energy also has made investments to expand its portfolio of wind and solar projects, increase energy efficiency offerings and invest in its zero-CO2 emissions hydropower and nuclear plants. These efforts have diversified its system and significantly reduced CO2 emissions. Between 2005 and 2018, the Duke Energy Registrants have collectively lowered the CO2 emissions from their electricity generation by 31 percent, which potentially lowers the exposure to any future mandatory CO2 emission reduction requirements or carbon tax, whether as a result of federal legislation, EPA regulation, state regulation or other as yet unknown emission reduction requirement. Duke Energy will continue to explore the use of currently available and commercially demonstrated technology to reduce CO2 emissions, including energy efficiency, wind, solar, storage and nuclear. Duke Energy will adjust to evolving and innovative technologies in a way that balances the reliability and affordability that customers expect. Under any future scenario involving mandatory CO2 limitations, the Duke Energy Registrants would plan to seek recovery of their compliance costs through appropriate regulatory mechanisms.
The Duke Energy Registrants recognize certain groups associate severe weather events with increasing levels of GHGs in the atmosphere and forecast the possibility these weather events could have a material impact on future results of operations should they occur more frequently and with greater severity. However, the uncertain nature of potential changes in extreme weather events (such as increased frequency, duration and severity), the long period of time over which any potential changes might take place and the inability to predict potential changes with any degree of accuracy, make estimating any potential future financial risk to the Duke Energy Registrants’ operations impossible.
The Duke Energy Registrants annually, biannually or triennially prepare lengthy, forward-looking IRPs. These detailed, highly technical plans are based on the company’s thorough analysis of numerous factors that can impact the cost of producing and delivering electricity that influence long-term resource planning decisions. The IRP process helps to evaluate a range of options, taking into account forecasts of future electricity demand, fuel prices, transmission improvements, new generating capacity, integration of renewables, energy storage, energy efficiency and demand response initiatives. The IRP process also helps evaluate potential environmental and regulatory scenarios to better mitigate policy and economic risks. The IRPs we file with regulators look out 10 to 20 years depending on the jurisdiction.
For a number of years, the Duke Energy Registrants have included a price on CO2 emissions in their IRP planning process to account for the potential regulation of CO2 emissions. Incorporating a price on CO2 emissions in the IRPs allows for the evaluation of existing and future resource needs against potential climate change policy risk in the absence of policy certainty. One of the challenges with using a CO2 price, especially in the absence of a clear and certain policy, is determining the appropriate price to use. To address this uncertainty and ensure the company remains agile, the Duke Energy Registrants typically use a range of potential CO2 prices to reflect a range of potential policy outcomes.
The Duke Energy Registrants routinely take steps to reduce the potential impact of severe weather events on their electric distribution systems by modernizing the electric grid through smart meters, storm hardening, self-healing and targeted undergrounding and applying lessons learned from previous storms to restoration efforts. The Duke Energy Registrants’ electric generating facilities are designed to withstand extreme weather events without significant damage. The Duke Energy Registrants maintain an inventory of coal and oil on-site to mitigate the effects of any potential short-term disruption in fuel supply so they can continue to provide customers with an uninterrupted supply of electricity.
State Legislation
In July 2017, the North Carolina General Assembly passed House Bill 589, and it was subsequently enacted into law by the governor. The law includes, among other things, overall reform of the application of PURPA for new solar projects in the state, a requirement for the utility to procure approximately 2,600 MW of renewable energy through a competitive bidding process and recovery of costs related to the competitive bidding process through the fuel clause and a competitive procurement rider. The law stipulated certain deadlines for Duke Energy to file for NCUC approval of programs required under the law. Duke Energy has made some regulatory filings since the passage of the law and will continue to implement the requirements of House Bill 589.
In July 2018, Duke Energy issued an RFP for the first tranche of 680 MW. In accordance with the provisions of HB 589, total procurement will be changed based upon how much generation with no economic dispatch or curtailment occurs over the procurement period. Most of this type of generation is solar procured under PURPA. Based upon the current forecasted amount of such generation that will occur over procurement period, Duke Energy estimates the total under HB 589 competitive procurement will be approximately 1,500 to 2,000 MW.
In various states, legislation is being considered to allow third-party sales of electricity. Deregulation or restructuring in the electric industry may result in increased competition and unrecovered costs. The Duke Energy Registrants cannot predict the outcome of these initiatives.



MD&AOTHER MATTERS


Liquefied Natural Gas Facility
Piedmont Natural Gas plans to build a liquefied natural gas facility in Robeson County, North Carolina. The project is expected to be completed in the summer of 2021 at a cost of $250 million. Construction will begin in the summer of 2019.
New Accounting Standards
See Note 1 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” for a discussion of the impact of new accounting standards.
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See “Management’s Discussion and Analysis of Results of Operations and Financial Condition – Quantitative and Qualitative Disclosures About Market Risk.”



FINANCIAL STATEMENTS


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Duke Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows 
Consolidated Statements of Changes in Equity
Duke Energy Carolinas
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Progress Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Progress
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Florida
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Ohio
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Indiana
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Piedmont
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity



FINANCIAL STATEMENTS


Combined Notes to Consolidated Financial Statements
Note 1 – Summary of Significant Accounting Policies
Note 2 – Acquisitions and Dispositions
Note 3 – Business Segments
Note 4 – Regulatory Matters
Note 5 – Commitments and Contingencies
Note 6 – Debt and Credit Facilities
Note 7 – Guarantees and Indemnifications
Note 8 – Joint Ownership of Generating and Transmission Facilities
Note 9 – Asset Retirement Obligations
Note 10 – Property, Plant and Equipment
Note 11 – Goodwill and Intangible Assets
Note 12 – Investments in Unconsolidated Affiliates
Note 13 – Related Party Transactions
Note 14 – Derivatives and Hedging
Note 15 – Investments in Debt and Equity Securities
Note 16 – Fair Value Measurements
Note 17 – Variable Interest Entities
Note 18 – Revenue
Note 19 – Common Stock
Note 20 – Severance
Note 21 – Stock-Based Compensation
Note 22 – Employee Benefit Plans
Note 23 – Income Taxes
Note 24 – Other Income and Expenses, Net
Note 25 – Subsequent Events
Note 26 – Quarterly Financial Data (Unaudited)



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of Duke Energy Corporation
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Corporation and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 2019, expressed an unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS
 Years Ended December 31,
(in millions, except per share amounts)2018
 2017
 2016
Operating Revenues     
Regulated electric$22,097
 $21,177
 $21,221
Regulated natural gas1,773
 1,734
 863
Nonregulated electric and other651
 654
 659
Total operating revenues24,521
 23,565
 22,743
Operating Expenses     
Fuel used in electric generation and purchased power6,831
 6,350
 6,625
Cost of natural gas697
 632
 265
Operation, maintenance and other6,463
 5,944
 6,224
Depreciation and amortization4,074
 3,527
 3,294
Property and other taxes1,280
 1,233
 1,142
Impairment charges402
 282
 18
Total operating expenses19,747
 17,968
 17,568
(Losses) Gains on Sales of Other Assets and Other, net(89) 28
 27
Operating Income4,685
 5,625
 5,202
Other Income and Expenses     
Equity in earnings (losses) of unconsolidated affiliates83
 119
 (15)
Other income and expenses, net399
 508
 463
Total other income and expenses482
 627
 448
Interest Expense2,094
 1,986
 1,916
Income From Continuing Operations Before Income Taxes3,073
 4,266
 3,734
Income Tax Expense From Continuing Operations448
 1,196
 1,156
Income From Continuing Operations2,625
 3,070
 2,578
Income (Loss) From Discontinued Operations, net of tax19
 (6) (408)
Net Income2,644
 3,064
 2,170
Less: Net (Loss) Income Attributable to Noncontrolling Interests(22) 5
 18
Net Income Attributable to Duke Energy Corporation$2,666
 $3,059
 $2,152
      
Earnings Per Share  Basic and Diluted
     
Income from continuing operations attributable to Duke Energy Corporation common stockholders     
Basic$3.73
 $4.37
 $3.71
Diluted$3.73
 $4.37
 $3.71
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders
    
Basic$0.03
 $(0.01) $(0.60)
Diluted$0.03
 $(0.01) $(0.60)
Net income attributable to Duke Energy Corporation common stockholders
    
Basic$3.76
 $4.36
 $3.11
Diluted$3.76
 $4.36
 $3.11
Weighted average shares outstanding     
Basic708
 700
 691
Diluted708
 700
 691
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  
2018
 2017
 2016
Net Income$2,644
 $3,064
 $2,170
Other Comprehensive (Loss) Income, net of tax     
Foreign currency translation adjustments
 
 694
Pension and OPEB adjustments(6) 3
 (11)
Net unrealized (losses) gains on cash flow hedges(10) 2
 17
Reclassification into earnings from cash flow hedges6
 8
 13
Unrealized (losses) gains on available-for-sale securities(3) 13
 2
Other Comprehensive (Loss) Income, net of tax  
(13) 26
 715
Comprehensive Income  
2,631
 3,090
 2,885
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests  
(22) 5
 20
Comprehensive Income Attributable to Duke Energy Corporation  
$2,653
 $3,085
 $2,865

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$442
 $358
Receivables (net of allowance for doubtful accounts of $16 at 2018 and $14 at 2017)962
 779
Receivables of VIEs (net of allowance for doubtful accounts of $55 at 2018 and $54 at 2017)2,172
 1,995
Inventory3,084

3,250
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)2,005
 1,437
Other (includes $162 at 2018 and $214 at 2017 related to VIEs)1,049
 634
Total current assets9,714
 8,453
Property, Plant and Equipment   
Cost134,458
 127,507
Accumulated depreciation and amortization(43,126) (41,537)
Generation facilities to be retired, net362
 421
Net property, plant and equipment91,694
 86,391
Other Noncurrent Assets   
Goodwill19,303
 19,396
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)13,617
 12,442
Nuclear decommissioning trust funds6,720
 7,097
Investments in equity method unconsolidated affiliates1,409
 1,175
Other2,935
 2,960
Total other noncurrent assets43,984
 43,070
Total Assets$145,392
 $137,914
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$3,487
 $3,043
Notes payable and commercial paper3,410
 2,163
Taxes accrued577
 551
Interest accrued559
 525
Current maturities of long-term debt (includes $227 at 2018 and $225 at 2017 related to VIEs)3,406
 3,244
Asset retirement obligations919
 689
Regulatory liabilities598
 402
Other2,085
 1,865
Total current liabilities15,041
 12,482
Long-Term Debt (includes $3,998 at 2018 and $4,306 at 2017 related to VIEs)51,123
 49,035
Other Noncurrent Liabilities   
Deferred income taxes7,806
 6,621
Asset retirement obligations9,548
 9,486
Regulatory liabilities14,834
 15,330
Accrued pension and other post-retirement benefit costs988
 1,103
Investment tax credits568
 539
Other (includes $212 at 2018 and $241 at 2017 related to VIEs)1,650
 1,581
Total other noncurrent liabilities35,394
 34,660
Commitments and Contingencies   
Equity   
Common stock, $0.001 par value, 2 billion shares authorized; 727 million shares outstanding at 2018 and 700 million shares outstanding at 20171
 1
Additional paid-in capital40,795
 38,792
Retained earnings3,113
 3,013
Accumulated other comprehensive loss(92) (67)
Total Duke Energy Corporation stockholders' equity43,817
 41,739
Noncontrolling interests17
 (2)
Total equity43,834
 41,737
Total Liabilities and Equity$145,392
 $137,914

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$2,644
 $3,064
 $2,170
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)4,696
 4,046
 3,880
Equity component of AFUDC(221) (237) (200)
Losses (Gains) on sales of other assets88
 (33) 477
Impairment charges402
 282
 212
Deferred income taxes1,079
 1,433
 900
Equity in (earnings) losses of unconsolidated affiliates(83) (119) 15
Accrued pension and other post-retirement benefit costs61
 8
 21
Contributions to qualified pension plans(141) (19) (155)
Payments for asset retirement obligations(533) (571) (608)
Payment for the disposal of other assets(105) 
 
Other rate case adjustments37
 
 
Provision for rate refunds425
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions22
 18
 34
Receivables(345) (83) (372)
Inventory156
 268
 272
Other current assets(721) (400) (174)
Increase (decrease) in     
Accounts payable479
 (204) 296
Taxes accrued23
 149
 236
Other current liabilities270
 (482) 182
Other assets(1,008) (436) (186)
Other liabilities(39) (60) (137)
Net cash provided by operating activities7,186

6,624

6,863
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(9,389) (8,052) (7,901)
Contributions to equity method investments(416) (414) (307)
Acquisitions, net of cash acquired
 (13) (4,778)
Return of investment capital137
 281
 1
Purchases of debt and equity securities(3,762) (4,071) (5,153)
Proceeds from sales and maturities of debt and equity securities3,747
 4,098
 5,236
Proceeds from the sales of discontinued operations and other assets, net of cash divested41
 
 1,418
Other(418) (271) (44)
Net cash used in investing activities(10,060)
(8,442)
(11,528)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the:     
Issuance of long-term debt5,299
 6,909
 9,238
Issuance of common stock1,838
 
 731
Payments for the redemption of long-term debt(2,906) (2,316) (1,923)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days472
 319
 2,081
Payments for the redemption of short-term debt with original maturities greater than 90 days(282) (272) (2,166)
Notes payable and commercial paper981
 (409) (1,362)
Dividends paid(2,471) (2,450) (2,332)
Other29
 1
 (16)
Net cash provided by financing activities2,960

1,782

4,251
Changes in cash and cash equivalents included in assets held for sale
 
 474
Net increase (decrease) in cash, cash equivalents, and restricted cash86

(36)
60
Cash, cash equivalents, and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents, and restricted cash at end of period$591

$505

$541
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$2,086
 $1,963
 $1,794
Cash (received from) paid for income taxes(266) 4
 229
Significant non-cash transactions:     
Accrued capital expenditures1,112
 1,032
 1,000
Non-cash dividends107
 
 
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         
Duke Energy Corporation Stockholders'
Accumulated Other Comprehensive Loss
      
             Net Unrealized
   Total
    
         Foreign
 Net
 Gains (Losses)
   Duke Energy
    
 Common
   Additional
   Currency
 Losses on
 on Available-
 Pension and
 Corporation
    
 Stock
 Common
 Paid-in
 Retained
 Translation
 Cash Flow
 for-Sale-
 OPEB
 Stockholders'
 Noncontrolling
 Total
(in millions)Shares
 Stock
 Capital
 Earnings
 Adjustments
 Hedges
 Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015688
 $1
 $37,968
 $2,564
 $(692) $(50) $(3) $(61) $39,727
 $44
 $39,771
Net income
 
 
 2,152
 
 
 
 
 2,152
 18
 2,170
Other comprehensive income (loss)(a)

 
 
 
 692
 30
 2
 (11) 713
 2
 715
Common stock issuances, including dividend reinvestment and employee benefits12
 
 773
 
 
 
 
 
 773
 
 773
Common stock dividends
 
 
 (2,332) 
 
 
 
 (2,332) 
 (2,332)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (6) (6)
Other(b)

 
 
 
 
 
 
 
 
 (50) (50)
Balance at December 31, 2016700

$1

$38,741

$2,384

$

$(20)
$(1)
$(72)
$41,033

$8

$41,041
Net income
 
 
 3,059
 
 
 
 
 3,059
 5
 3,064
Other comprehensive income
 
 
 
 
 10
 13
 3
 26
 
 26
Common stock issuances, including dividend reinvestment and employee benefits
 
 51
 
 
 
 
 
 51
 
 51
Common stock dividends
 
 
 (2,450) 
 
 
 
 (2,450) 
 (2,450)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (2) (2)
Other(c)

 
 
 20
 
 
 
 
 20
 (13) 7
Balance at December 31, 2017700

$1

$38,792

$3,013

$

$(10)
$12

$(69)
$41,739

$(2)
$41,737
Net income
 
 
 2,666
 
 
 
 
 2,666
 (22) 2,644
Other comprehensive (loss) income
 
 
 
 
 (4) (3) (6) (13) 
 (13)
Common stock issuances, including dividend reinvestment and employee benefits27
 
 2,003
 
 
 
 
 
 2,003
 
 2,003
Common stock dividends
 
 
 (2,578) 
 
 
 
 (2,578) 
 (2,578)
Distributions to noncontrolling interests in subsidiaries
 
 
 
 
 
 
 
 
 (1) (1)
Other(d)

 
 
 12
 
 
 (12) 
 
 42
 42
Balance at December 31, 2018727
 $1
 $40,795
 $3,113
 $
 $(14) $(3) $(75) $43,817
 $17
 $43,834
(a)Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(b)Noncontrolling Interests amount is primarily related to the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(c)Retained Earnings relates to a cumulative-effect adjustment due to implementation of a new accounting standard related to stock-based compensation and the associated income taxes. See Note 1 to the Consolidated Financial Statements for additional information. Noncontrolling Interests relates to the purchase of remaining interest in REC Solar.
(d)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information. Amount in Noncontrolling Interests primarily relates to tax equity financing activity in the Commercial Renewables segment.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Carolinas, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Carolinas, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.




FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$7,300
 $7,302
 $7,322
Operating Expenses     
Fuel used in electric generation and purchased power1,821

1,822
 1,797
Operation, maintenance and other2,130

2,021
 2,158
Depreciation and amortization1,201

1,090
 1,075
Property and other taxes295

281
 276
Impairment charges192


 1
Total operating expenses5,639
 5,214
 5,307
(Losses) Gains on Sales of Other Assets and Other, net(1) 1
 (5)
Operating Income1,660
 2,089
 2,010
Other Income and Expenses, net153
 199
 214
Interest Expense439
 422
 424
Income Before Income Taxes1,374
 1,866
 1,800
Income Tax Expense303
 652
 634
Net Income$1,071
 $1,214
 $1,166
Other Comprehensive Income, net of tax     
Reclassification into earnings from cash flow hedges1
 2
 2
Other Comprehensive Income, net of tax1
 2
 2
Comprehensive Income$1,072
 $1,216
 $1,168
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED BALANCE SHEETS
  December 31,
(in millions) 2018
 2017
ASSETS    
Current Assets    
Cash and cash equivalents $33
 $16
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017) 219
 200
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2018 and 2017) 699
 640
Receivables from affiliated companies 182
 95
Inventory 948

971
Regulatory assets 520
 299
Other 72
 19
Total current assets 2,673
 2,240
Property, Plant and Equipment    
Cost 44,741
 42,939
Accumulated depreciation and amortization (15,496) (15,063)
Net property, plant and equipment 29,245
 27,876
Other Noncurrent Assets    
Regulatory assets 3,457
 2,853
Nuclear decommissioning trust funds 3,558
 3,772
Other 1,027
 979
Total other noncurrent assets 8,042
 7,604
Total Assets $39,960
 $37,720
LIABILITIES AND EQUITY    
Current Liabilities    
Accounts payable $988
 $842
Accounts payable to affiliated companies 230
 209
Notes payable to affiliated companies 439
 104
Taxes accrued 171
 234
Interest accrued 102
 108
Current maturities of long-term debt 6
 1,205
Asset retirement obligations 290
 337
Regulatory liabilities 199
 126
Other 571
 486
Total current liabilities 2,996
 3,651
Long-Term Debt 10,633
 8,598
Long-Term Debt Payable to Affiliated Companies 300
 300
Other Noncurrent Liabilities    
Deferred income taxes 3,689
 3,413
Asset retirement obligations 3,659
 3,273
Regulatory liabilities 5,999
 6,231
Accrued pension and other post-retirement benefit costs 99
 95
Investment tax credits 231
 232
Other 671
 566
Total other noncurrent liabilities 14,348
 13,810
Commitments and Contingencies 
 
Equity    
Member's equity 11,689
 11,368
Accumulated other comprehensive loss (6) (7)
Total equity 11,683
 11,361
Total Liabilities and Equity $39,960
 $37,720
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,071
 $1,214
 $1,166
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,487
 1,409
 1,382
Equity component of AFUDC(73) (106) (102)
Losses (Gains) on sales of other assets1
 (1) 5
Impairment charges192
 
 1
Deferred income taxes305
 410
 470
Accrued pension and other post-retirement benefit costs4
 (4) 4
Contributions to qualified pension plans(46) 
 (43)
Payments for asset retirement obligations(230) (271) (287)
Provision for rate refunds182
 
 
(Increase) decrease in
    
Net realized and unrealized mark-to-market and hedging transactions2
 9
 5
Receivables(86) (9) (76)
Receivables from affiliated companies(87) 68
 (56)
Inventory25
 78
 215
Other current assets(161) 7
 67
Increase (decrease) in
    
Accounts payable168
 23
 (69)
Accounts payable to affiliated companies21
 (38) 18
Taxes accrued(65) 86
 187
Other current liabilities89
 (161) 63
Other assets(179) (49) 20
Other liabilities(90) (31) 6
Net cash provided by operating activities2,530
 2,634
 2,976
CASH FLOWS FROM INVESTING ACTIVITIES
    
Capital expenditures(2,706) (2,524) (2,220)
Purchases of debt and equity securities(1,810) (2,124) (2,832)
Proceeds from sales and maturities of debt and equity securities1,810
 2,128
 2,832
Notes receivable from affiliated companies
 66
 97
Other(147) (109) (83)
Net cash used in investing activities(2,853) (2,563) (2,206)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,983
 569
 1,587
Payments for the redemption of long-term debt(1,205) (116) (356)
Notes payable to affiliated companies335
 104
 
Distributions to parent(750) (625) (2,000)
Other(23) (1) 
Net cash provided by (used in) financing activities340
 (69) (769)
Net increase in cash and cash equivalents17
 2
 1
Cash and cash equivalents at beginning of period16
 14
 13
Cash and cash equivalents at end of period$33
 $16
 $14
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$452
 $398
 $393
Cash paid for (received from) income taxes89
 193
 (60)
Significant non-cash transactions:     
Accrued capital expenditures302
 315
 347
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Accumulated Other  
   Comprehensive  
   Loss  
   Net Losses
  
   on Cash
  
 Member's
 Flow
 Total
(in millions)Equity
 Hedges
 Equity
Balance at December 31, 2015$11,617
 $(11) $11,606
Net income1,166
 
 1,166
Other comprehensive income
 2
 2
Distributions to parent(2,000) 
 (2,000)
Other(2) 
 (2)
Balance at December 31, 2016$10,781
 $(9) $10,772
Net income1,214
 
 1,214
Other comprehensive income
 2
 2
Distributions to parent(625) 
 (625)
Other(2) 
 (2)
Balance at December 31, 2017$11,368
 $(7) $11,361
Net income  
1,071
 
 1,071
Other comprehensive income  

 1
 1
Distributions to parent  
(750) 
 (750)
Balance at December 31, 2018$11,689
 $(6) $11,683
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Progress Energy, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Progress Energy, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$10,728
 $9,783
 $9,853
Operating Expenses     
Fuel used in electric generation and purchased power3,976
 3,417
 3,644
Operation, maintenance and other2,613
 2,301
 2,458
Depreciation and amortization1,619
 1,285
 1,213
Property and other taxes529
 503
 487
Impairment charges87
 156
 7
Total operating expenses8,824

7,662

7,809
Gains on Sales of Other Assets and Other, net24
 26
 25
Operating Income1,928

2,147

2,069
Other Income and Expenses, net165
 209
 186
Interest Expense842
 824
 689
Income From Continuing Operations Before Income Taxes1,251

1,532

1,566
Income Tax Expense From Continuing Operations218
 264
 527
Income From Continuing Operations1,033

1,268

1,039
Income From Discontinued Operations, net of tax
 
 2
Net Income1,033

1,268

1,041
Less: Net Income Attributable to Noncontrolling Interests6
 10
 10
Net Income Attributable to Parent$1,027

$1,258

$1,031
      
Net Income  
$1,033

$1,268

$1,041
Other Comprehensive Income, net of tax  
     
Pension and OPEB adjustments5
 4
 1
Net unrealized gain on cash flow hedges6
 5
 
Reclassification into earnings from cash flow hedges
 
 8
Unrealized (losses) gains on available-for-sale securities(1) 4
 1
Other Comprehensive Income, net of tax  
10

13

10
Comprehensive Income  
1,043

1,281

1,051
Less: Comprehensive Income Attributable to Noncontrolling Interests6
 10
 10
Comprehensive Income Attributable to Parent$1,037

$1,271

$1,041

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$67
 $40
Receivables (net of allowance for doubtful accounts of $5 at 2018 and $4 at 2017)220
 123
Receivables of VIEs (net of allowance for doubtful accounts of $8 at 2018 and $7 at 2017)909
 780
Receivables from affiliated companies168
 31
Notes receivable from affiliated companies
 240
Inventory1,459

1,592
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)1,137
 741
Other (includes $39 at 2018 and $44 at 2017 related to VIEs)125
 334
Total current assets4,085
 3,881
Property, Plant and Equipment   
Cost50,260
 47,323
Accumulated depreciation and amortization(16,398) (15,857)
Generation facilities to be retired, net362
 421
Net property, plant and equipment34,224
 31,887
Other Noncurrent Assets   
Goodwill3,655
 3,655
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)6,564
 6,010
Nuclear decommissioning trust funds3,162
 3,324
Other974
 931
Total other noncurrent assets14,355
 13,920
Total Assets$52,664
 $49,688
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$1,172
 $1,006
Accounts payable to affiliated companies360
 251
Notes payable to affiliated companies1,235
 805
Taxes accrued109
 101
Interest accrued246
 212
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)1,672
 771
Asset retirement obligations514
 295
Regulatory liabilities280
 213
Other821
 729
Total current liabilities6,409
 4,383
Long-Term Debt (includes $1,636 at 2018 and $1,689 at 2017 related to VIEs)17,089
 16,916
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes3,941
 3,502
Asset retirement obligations4,897
 5,119
Regulatory liabilities5,049
 5,306
Accrued pension and other post-retirement benefit costs521
 545
Other351
 302
Total other noncurrent liabilities14,759
 14,774
Commitments and Contingencies
 
Equity   
Common stock, $0.01 par value, 100 shares authorized and outstanding at 2018 and 2017
 
Additional paid-in capital9,143
 9,143
Retained earnings5,131
 4,350
Accumulated other comprehensive loss(20) (25)
Total Progress Energy, Inc. stockholder's equity14,254
 13,468
Noncontrolling interests3
 (3)
Total equity14,257
 13,465
Total Liabilities and Equity$52,664

$49,688
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,033
 $1,268
 $1,041
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)1,987
 1,516
 1,435
Equity component of AFUDC(104) (92) (76)
Gains on sales of other assets(24) (28) (34)
Impairment charges87
 156
 7
Deferred income taxes358
 703
 532
Accrued pension and other post-retirement benefit costs24
 (28) (24)
Contributions to qualified pension plans(45) 
 (43)
Payments for asset retirement obligations(230) (248) (270)
Other rate case adjustments37
 
 
Provision for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions18
 
 42
Receivables(207) (89) 7
Receivables from affiliated companies(137) 71
 211
Inventory121
 125
 35
Other current assets(12) (397) 50
Increase (decrease) in     
Accounts payable217
 (260) 252
Accounts payable to affiliated companies109
 (97) 37
Taxes accrued8
 17
 15
Other current liabilities129
 (166) (42)
Other assets(913) (300) (248)
Other liabilities(34) (98) (36)
Net cash provided by operating activities2,544

2,053

2,891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(3,854) (3,152) (3,306)
Asset Acquisitions
 
 (10)
Purchases of debt and equity securities(1,753) (1,806) (2,143)
Proceeds from sales and maturities of debt and equity securities1,769
 1,824
 2,187
Net proceeds from sales of other assets20
 
 
Proceeds from insurance
 7
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies240
 (160) (80)
Other(182) (86) 47
Net cash used in investing activities(3,760) (3,353) (3,227)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,833
 2,118
 2,375
Payments for the redemption of long-term debt(771) (813) (327)
Notes payable to affiliated companies430
 100
 444
Dividends to parent(250) (124) (2,098)
Other(1) (4) (3)
Net cash provided by financing activities1,241

1,277

391
Net increase (decrease) in cash, cash equivalents, and restricted cash25

(23)
55
Cash, cash equivalents, and restricted cash at beginning of period87
 110
 55
Cash, cash equivalents, and restricted cash at end of period$112
 $87
 $110
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$798
 $773
 $673
Cash received from income taxes(348) (146) (187)
Significant non-cash transactions:     
Accrued capital expenditures478
 391
 317
Equitization of certain notes payable to affiliates
 1,047
 
Dividend to parent related to a legal entity restructuring
 547
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
  
  
 Accumulated Other Comprehensive Loss  
  
  
     Net
 Net Unrealized
   Total Progress
    
 Additional
   Losses on
 Gains (Losses)
 Pension and
 Energy, Inc.
    
 Paid-in
 Retained
 Cash Flow
 on Available-for-
 OPEB
 Stockholder's
 Noncontrolling
 Total
(in millions)Capital
 Earnings
 Hedges
 Sale Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015$8,092
 $4,831
 $(31) $
 $(17) $12,875
 $(22) $12,853
Net income
 1,031
 
 
 
 1,031
 10
 1,041
Other comprehensive income
 
 8
 1
 1
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (2,098) 
 
 
 (2,098) 
 (2,098)
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2016$8,094

$3,764

$(23)
$1

$(16)
$11,820

$(13)
$11,807
Net income
 1,258
 
 
 
 1,258
 10
 1,268
Other comprehensive income
 
 5
 4
 4
 13
 
 13
Dividends to parent(a)

 (672) 
 
 
 (672) 
 (672)
Equitization of certain notes payable to affiliates1,047
 
 
 
 
 1,047
 
 1,047
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2017$9,143

$4,350

$(18)
$5

$(12)
$13,468

$(3)
$13,465
Net income
 1,027
 
 
 
 1,027
 6
 1,033
Other comprehensive income (loss)
 
 6
 (1) 5
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (250) 
 
 
 (250) 
 (250)
Other(b)

 4
 
 (5) 
 (1) 1
 
Balance at December 31, 2018$9,143

$5,131

$(12)
$(1)
$(7)
$14,254

$3

$14,257
(a)Includes a $547 million non-cash dividend related to a legal entity restructuring.
(b)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Progress, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Progress, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,699
 $5,129
 $5,277
Operating Expenses     
Fuel used in electric generation and purchased power1,892
 1,609
 1,830
Operation, maintenance and other1,578
 1,439
 1,565
Depreciation and amortization991
 725
 703
Property and other taxes155
 156
 156
Impairment charges33
 19
 1
Total operating expenses4,649
 3,948
 4,255
Gains on Sales of Other Assets and Other, net9
 4
 3
Operating Income1,059
 1,185
 1,025
Other Income and Expenses, net87
 115
 132
Interest Expense319
 293
 257
Income Before Income Taxes827
 1,007
 900
Income Tax Expense160
 292
 301
Net Income and Comprehensive Income$667
 $715
 $599
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$23
 $20
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $1 at 2017)75
 56
Receivables of VIEs (net of allowance for doubtful accounts of $5 at 2018 and 2017)547
 459
Receivables from affiliated companies23
 3
Inventory954

1,017
Regulatory assets703
 352
Other62
 97
Total current assets2,387
 2,004
Property, Plant and Equipment   
Cost31,459
 29,583
Accumulated depreciation and amortization(11,423) (10,903)
Generation facilities to be retired, net362
 421
Net property, plant and equipment20,398
 19,101
Other Noncurrent Assets   
Regulatory assets4,111
 3,507
Nuclear decommissioning trust funds2,503
 2,588
Other612
 599
Total other noncurrent assets7,226
 6,694
Total Assets$30,011
 $27,799
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$660
 $402
Accounts payable to affiliated companies278
 179
Notes payable to affiliated companies294
 240
Taxes accrued53
 64
Interest accrued116
 102
Current maturities of long-term debt603
 3
Asset retirement obligations509
 295
Regulatory liabilities178
 139
Other408
 376
Total current liabilities3,099
 1,800
Long-Term Debt7,451
 7,204
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes2,119
 1,883
Asset retirement obligations4,311
 4,378
Regulatory liabilities3,955
 3,999
Accrued pension and other post-retirement benefit costs237
 248
Investment tax credits142
 143
Other106
 45
Total other noncurrent liabilities10,870
 10,696
Commitments and Contingencies   
Equity   
Member's Equity8,441
 7,949
Total Liabilities and Equity$30,011
 $27,799
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018 2017 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$667
 $715
 $599
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,183
 936
 907
Equity component of AFUDC(57) (47) (50)
Gains on sales of other assets(9) (5) (6)
Impairment charges33
 19
 1
Deferred income taxes236
 384
 384
Accrued pension and other post-retirement benefit costs15
 (20) (32)
Contributions to qualified pension plans(25) 
 (24)
Payments for asset retirement obligations(195) (192) (212)
Other rate case adjustments37
 
 
Provisions for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions5
 (4) 4
Receivables(107) (58) (17)
Receivables from affiliated companies(20) 2
 11
Inventory63
 59
 12
Other current assets(201) (75) 84
Increase (decrease) in     
Accounts payable219
 (230) 181
Accounts payable to affiliated companies99
 (48) 37
Taxes accrued(11) (39) 90
Other current liabilities46
 (131) 114
Other assets(484) (53) (163)
Other liabilities12
 (18) 12
Net cash provided by operating activities1,628
 1,195
 1,932
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(2,220) (1,715) (1,733)
Purchases of debt and equity securities(1,236) (1,249) (1,658)
Proceeds from sales and maturities of debt and equity securities1,206
 1,207
 1,615
Net proceeds from the sales of other assets20
 
 
Proceeds from insurance
 4
 
Notes receivable from affiliated companies
 165
 (165)
Other(115) (55) 26
Net cash used in investing activities(2,345) (1,643) (1,915)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt845
 812
 505
Payments for the redemption of long-term debt(3) (470) (15)
Notes payable to affiliated companies54
 240
 (209)
Distributions to parent(175) (124) (300)
Other(1) (1) (2)
Net cash provided by (used in) financing activities720
 457
 (21)
Net increase (decrease) in cash and cash equivalents3
 9
 (4)
Cash and cash equivalents at beginning of period20
 11
 15
Cash and cash equivalents at end of period$23
 $20
 $11
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$303
 $291
 $248
Cash (received from) paid for income taxes(112) 59
 (287)
Significant non-cash transactions:     
Accrued capital expenditures220
 191
 147
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
 Member's
(in millions)Equity
Balance at December 31, 2015$7,059
Net income599
Distribution to parent(300)
Balance at December 31, 2016$7,358
Net income715
Distribution to parent(124)
Balance at December 31, 2017$7,949
Net income667
Distribution to parent(175)
Balance at December 31, 2018$8,441
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Florida, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Florida, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2001.




FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,021
 $4,646
 $4,568
Operating Expenses     
Fuel used in electric generation and purchased power2,085
 1,808
 1,814
Operation, maintenance and other1,025
 853
 884
Depreciation and amortization628
 560
 509
Property and other taxes374
 347
 333
Impairment charges54
 138
 6
Total operating expenses4,166
 3,706
 3,546
Gains on Sales of Other Assets and Other, net1
 1
 
Operating Income856
 941
 1,022
Other Income and Expenses, net86
 96
 63
Interest Expense287
 279
 212
Income Before Income Taxes655
 758
 873
Income Tax Expense101
 46
 322
Net Income$554
 $712
 $551
Other Comprehensive (Loss) Income, net of tax     
Unrealized (losses) gains on available-for-sale securities(1) 3
 1
Other Comprehensive (Loss) Income, net of tax(1) 3
 1
Comprehensive Income$553
 $715
 $552
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$36
 $13
Receivables (net of allowance for doubtful accounts of $3 at 2018 and 2017)143
 65
Receivables of VIEs (net of allowance for doubtful accounts of $3 at 2018 and $2 at 2017)362
 321
Receivables from affiliated companies28
 2
Notes receivable from affiliated companies
 313
Inventory504

574
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)434
 389
Other (includes $39 at 2018 and $40 at 2017 related to VIEs)46
 86
Total current assets1,553
 1,763
Property, Plant and Equipment   
Cost18,792
 17,730
Accumulated depreciation and amortization(4,968) (4,947)
Net property, plant and equipment13,824
 12,783
Other Noncurrent Assets   
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)2,454
 2,503
Nuclear decommissioning trust funds659
 736
Other311
 284
Total other noncurrent assets3,424
 3,523
Total Assets$18,801
 $18,069
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$511
 $602
Accounts payable to affiliated companies91
 74
Notes payable to affiliated companies108
 
Taxes accrued74
 34
Interest accrued75
 56
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)270
 768
Asset retirement obligations5
 
Regulatory liabilities102
 74
Other406
 334
Total current liabilities1,642
 1,942
Long-Term Debt (includes $1,336 at 2018 and $1,389 at 2017 related to VIEs)7,051
 6,327
Other Noncurrent Liabilities   
Deferred income taxes1,986
 1,761
Asset retirement obligations586
 742
Regulatory liabilities1,094
 1,307
Accrued pension and other post-retirement benefit costs254
 264
Other93
 108
Total other noncurrent liabilities4,013
 4,182
Commitments and Contingencies   
Equity   
Member's equity6,097
 5,614
Accumulated other comprehensive income(2) 4
Total equity6,095
 5,618
Total Liabilities and Equity$18,801
 $18,069
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$554
 $712
 $551
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion793
 570
 516
Equity component of AFUDC(47) (45) (26)
Gains on sales of other assets(1) (1) 
Impairment charges54
 138
 6
Deferred income taxes159
 245
 224
Accrued pension and other post-retirement benefit costs5
 (13) 2
Contributions to qualified pension plans(20) 
 (20)
Payments for asset retirement obligations(35) (56) (58)
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions7
 5
 38
Receivables(100) (38) 23
Receivables from affiliated companies(26) 
 21
Inventory58
 66
 23
Other current assets59
 (138) (86)
Increase (decrease) in     
Accounts payable(1) (32) 71
Accounts payable to affiliated companies17
 (51) 9
Taxes accrued40
 1
 (117)
Other current liabilities82
 (37) (149)
Other assets(428) (229) (84)
Other liabilities(61) (82) (53)
Net cash provided by operating activities1,109
 1,015
 891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(1,634) (1,437) (1,583)
Purchases of debt and equity securities(517) (557) (485)
Proceeds from sales and maturities of debt and equity securities563
 617
 572
Proceeds from insurance
 4
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies313
 (313) 
Other(65) (31) 21
Net cash used in investing activities(1,340) (1,697) (1,397)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt988
 1,306
 1,870
Payments for the redemption of long-term debt(769) (342) (12)
Notes payable to affiliated companies108
 (297) (516)
Distribution to parent(75) 
 (775)
Other1
 (1) 
Net cash provided by financing activities253
 666
 567
Net increase (decrease) in cash, cash equivalents, and restricted cash22
 (16) 61
Cash, cash equivalents, and restricted cash at beginning of period53
 69
 8
Cash, cash equivalents, and restricted cash at end of period$75
 $53
 $69
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$270
 $274
 $208
Cash (received from) paid for income taxes(120) (197) 216
Significant non-cash transactions:     
Accrued capital expenditures258
 199
 170
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
    Accumulated 
    Other 
    Comprehensive 
    Income (Loss) 
    Net Unrealized
  
    Gains (Losses) on
  
  Member's
 Available-for-
 Total
(in millions) Equity
 Sale Securities
 Equity
Balance at December 31, 2015 $5,121
 $
 $5,121
Net income 551
 
 551
Other comprehensive income 
 1
 1
Distribution to parent (775) 
 (775)
Other 2
 
 2
Balance at December 31, 2016 $4,899
 $1
 $4,900
Net income 712
 
 712
Other comprehensive income 
 3
 3
Other 3
 
 3
Balance at December 31, 2017 $5,614
 $4
 $5,618
Net income 554
 
 554
Other comprehensive loss 
 (1) (1)
Distribution to parent (75) 
 (75)
Other(a)
 4
 (5) (1)
Balance at December 31, 2018 $6,097
 $(2) $6,095
(a)Amounts represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Ohio, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Ohio, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  2018
 2017
 2016
Operating Revenues     
Regulated electric$1,450
 $1,373
 $1,410
Regulated natural gas506
 508
 503
Nonregulated electric and other1
 42
 31
Total operating revenues1,957
 1,923
 1,944
Operating Expenses  
     
Fuel used in electric generation and purchased power – regulated412
 369
 442
Fuel used in electric generation and purchased power – nonregulated
 58
 51
Cost of natural gas  113
 107
 103
Operation, maintenance and other480
 530
 514
Depreciation and amortization268
 261
 233
Property and other taxes290
 278
 258
Impairment charges
 1
 
Total operating expenses1,563
 1,604
 1,601
(Losses) Gains on Sales of Other Assets and Other, net(106) 1
 2
Operating Income288
 320
 345
Other Income and Expenses, net23
 23
 11
Interest Expense92
 91
 86
Income From Continuing Operations Before Income Taxes219
 252
 270
Income Tax Expense From Continuing Operations43
 59
 78
Income From Continuing Operations176
 193
 192
(Loss) Income From Discontinued Operations, net of tax
 (1) 36
Net Income and Comprehensive Income$176
 $192
 $228
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$21
 $12
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $3 at 2017)102
 68
Receivables from affiliated companies114
 133
Notes receivable from affiliated companies
 14
Inventory126

133
Regulatory assets33
 49
Other24
 39
Total current assets420
 448
Property, Plant and Equipment   
Cost9,360
 8,732
Accumulated depreciation and amortization(2,717) (2,691)
Net property, plant and equipment6,643
 6,041
Other Noncurrent Assets   
Goodwill920
 920
Regulatory assets531
 445
Other41
 21
Total other noncurrent assets1,492
 1,386
Total Assets$8,555
 $7,875
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$316
 $313
Accounts payable to affiliated companies78
 62
Notes payable to affiliated companies274
 29
Taxes accrued202
 190
Interest accrued22
 21
Current maturities of long-term debt551
 3
Asset retirement obligations6
 3
Regulatory liabilities57
 36
Other74
 71
Total current liabilities1,580
 728
Long-Term Debt1,589
 2,039
Long-Term Debt Payable to Affiliated Companies25
 25
Other Noncurrent Liabilities   
Deferred income taxes817
 781
Asset retirement obligations87
 81
Regulatory liabilities840
 891
Accrued pension and other post-retirement benefit costs79
 59
Other93
 108
Total other noncurrent liabilities1,916
 1,920
Commitments and Contingencies   
Equity   
Common stock, $8.50 par value, 120 million shares authorized; 90 million shares outstanding at 2018 and 2017762
 762
Additional paid-in capital2,776
 2,670
Accumulated deficit(93) (269)
Total equity3,445
 3,163
Total Liabilities and Equity$8,555
 $7,875
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$176
 $192
 $228
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion271
 265
 237
Equity component of AFUDC(11) (11) (6)
Losses (Gains) on sales of other assets106
 (1) (2)
Impairment charges
 1
 
Deferred income taxes25
 90
 55
Accrued pension and other post-retirement benefit costs3
 2
 6
Contributions to qualified pension plans
 (4) (5)
Payments for asset retirement obligations(3) (7) (5)
Provision for rate refunds24
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions
 
 (2)
Receivables(33) 2
 (4)
Receivables from affiliated companies19
 (4) (36)
Inventory7
 6
 (32)
Other current assets16
 (22) 79
Increase (decrease) in     
Accounts payable(19) 12
 19
Accounts payable to affiliated companies16
 (1) 10
Taxes accrued12
 11
 3
Other current liabilities14
 (19) (54)
Other assets(26) (28) (35)
Other liabilities(27) (5) (31)
Net cash provided by operating activities570
 479
 425
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(827) (686) (476)
Notes receivable from affiliated companies14
 80
 (94)
Other(89) (41) (30)
Net cash used in investing activities(902) (647) (600)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt99
 182
 341
Payments for the redemption of long-term debt(3) (2) (53)
Notes payable to affiliated companies245
 13
 (87)
Dividends to parent
 (25) (25)
Other
 (1) (2)
Net cash provided by financing activities341
 167
 174
Net increase (decrease) in cash and cash equivalents9
 (1) (1)
Cash and cash equivalents at beginning of period12
 13
 14
Cash and cash equivalents at end of period$21
 $12
 $13
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$87
 $85
 $81
Cash received from income taxes(6) (8) (46)
Significant non-cash transactions:     
Accrued capital expenditures95
 82
 83
Non-cash equity contribution from parent106
 
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Additional
    
 Common
 Paid-in
 Accumulated
 Total
(in millions)Stock
 Capital
 Deficit
 Equity
Balance at December 31, 2015$762
 $2,720
 $(698) $2,784
Net income
 
 228
 228
Contribution from parent
 
 9
 9
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2016$762
 $2,695
 $(461) $2,996
Net income
 
 192
 192
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2017$762

$2,670

$(269)
$3,163
Net income
 
 176
 176
Contribution from parent
 106
 
 106
Balance at December 31, 2018$762
 $2,776
 $(93) $3,445
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Indiana, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Indiana, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$3,059
 $3,047
 $2,958
Operating Expenses     
Fuel used in electric generation and purchased power1,000

966
 909
Operation, maintenance and other788

743
 727
Depreciation and amortization520

458
 496
Property and other taxes78

76
 58
Impairment charges30

18
 8
Total operating expenses2,416
 2,261
 2,198
Gains on Sales of Other Assets and Other, net
 
 1
Operating Income643
 786
 761
Other Income and Expenses, net45
 47
 26
Interest Expense167
 178
 181
Income Before Income Taxes521

655

606
Income Tax Expense128
 301
 225
Net Income$393

$354

$381
Other Comprehensive Loss, net of tax     
Reclassification into earnings from cash flow hedges
 
 (1)
Comprehensive Income$393

$354

$380
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$24
 $9
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)52
 57
Receivables from affiliated companies122
 125
Inventory422

450
Regulatory assets175
 165
Other35
 30
Total current assets830
 836
Property, Plant and Equipment   
Cost15,443
 14,948
Accumulated depreciation and amortization(4,914) (4,662)
Net property, plant and equipment10,529
 10,286
Other Noncurrent Assets  
Regulatory assets982
 978
Other194
 189
Total other noncurrent assets1,176
 1,167
Total Assets$12,535
 $12,289
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$200
 $196
Accounts payable to affiliated companies83
 78
Notes payable to affiliated companies167
 161
Taxes accrued43
 95
Interest accrued58
 57
Current maturities of long-term debt63
 3
Asset retirement obligations109
 54
Regulatory liabilities25
 24
Other107
 104
Total current liabilities855
 772
Long-Term Debt3,569
 3,630
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes1,009
 925
Asset retirement obligations613
 727
Regulatory liabilities1,722
 1,723
Accrued pension and other post-retirement benefit costs115
 76
Investment tax credits147
 147
Other16
 18
Total other noncurrent liabilities3,622
 3,616
Commitments and Contingencies   
Equity   
Member's Equity4,339
 4,121
Total Liabilities and Equity$12,535
 $12,289
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$393
 $354
 $381
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization, and accretion524
 462
 499
Equity component of AFUDC(32) (28) (16)
Impairment charges30
 18
 8
Deferred income taxes95
 152
 213
Accrued pension and other post-retirement benefit costs7
 2
 8
Contributions to qualified pension plans(8) 
 (9)
Payments for asset retirement obligations(69) (45) (46)
Provision for rate refunds53
 
 
(Increase) decrease in     
Receivables7
 59
 (2)
Receivables from affiliated companies3
 (11) (43)
Inventory28
 54
 66
Other current assets(25) 28
 (67)
Increase (decrease) in     
Accounts payable37
 (86) 8
Accounts payable to affiliated companies5
 4
 (9)
Taxes accrued(52) 64
 (4)
Other current liabilities14
 (10) (81)
Other assets29
 (28) (27)
Other liabilities(33) (20) (8)
Net cash provided by operating activities1,006
 969
 871
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(832) (840) (755)
Purchases of debt and equity securities(48) (20) (14)
Proceeds from sales and maturities of debt and equity securities44
 7
 11
Proceeds from the sales of other assets15
 
 
Notes receivable from affiliated companies
 86
 (3)
Other3
 (65) 32
Net cash used in investing activities(818) (832) (729)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt
 
 494
Payments for the redemption of long-term debt(3) (5) (478)
Notes payable to affiliated companies6
 161
 
Distributions to parent(175) (300) (149)
Other(1) (1) (1)
Net cash used in financing activities(173) (145) (134)
Net increase (decrease) in cash and cash equivalents15
 (8) 8
Cash and cash equivalents at beginning of period9
 17
 9
Cash and cash equivalents at end of period$24
 $9
 $17
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$162
 $179
 $171
Cash paid for (received from) income taxes75
 117
 (7)
Significant non-cash transactions:     
Accrued capital expenditures88
 125
 99
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         Accumulated  
         Other  
         Comprehensive  
         Income  
   Additional
     Net Gains on
  
 Common
 Paid-in
 Retained
 Member's
 Cash Flow
 Total
(in millions)Stock
 Capital
 Earnings
 Equity
 Hedges
 Equity
Balance at December 31, 2015$1
 $1,384
 $2,450
 $
 $1
 $3,836
Net income
 
 
 381
 
 381
Other comprehensive loss
 
 
 
 (1) (1)
Distributions to parent
 
 
 (149) 
 (149)
Transfer to Member's Equity(1) (1,384) (2,450) 3,835
 
 
Balance at December 31, 2016$

$

$

$4,067
 $

$4,067
Net income
 
 
 354
 
 354
Distributions to parent
 
 
 (300) 
 (300)
Balance at December 31, 2017$

$

$

$4,121
 $

$4,121
Net income
 
 
 393
 
 393
Distributions to parent
 
 
 (175) 
 (175)
Balance at December 31, 2018$

$

$

$4,339
 $

$4,339
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Piedmont Natural Gas Company, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Piedmont Natural Gas Company, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31 2016, and for the two months ended December 31, 2016 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31, 2016, and for the two months ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Emphasis of Matter
As discussed in Note 1 to the financial statements, effective for fiscal year 2016, the Company changed its fiscal year end from October 31 to December 31. This resulted in a two-month transition period beginning November 1, 2016 through December 31, 2016.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1951.




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31, Two Months Ended
December 31,
 Year Ended
October 31,
(in millions)2018
 2017
 2016
 2016
Operating Revenues       
Regulated natural gas$1,365
 $1,319
 $320
 $1,139
Nonregulated natural gas and other10
 9
 2
 10
Total operating revenues1,375
 1,328
 322
 1,149
Operating Expenses       
Cost of natural gas584
 524
 144
 391
Operation, maintenance and other357
 304
 50
 353
Depreciation and amortization159
 148
 23
 137
Property and other taxes49
 48
 7
 43
Impairment charges
 7
 
 
Total operating expenses1,149
 1,031

224
 924
Operating Income226
 297

98
 225
Equity in earnings (losses) of unconsolidated affiliates7
 (6) 2
 29
Gain on sale of unconsolidated affiliates
 
 
 133
Other income and expense, net14
 (11) (2) (1)
Total other income and expenses21
 (17)

 161
Interest Expense81
 79
 12
 69
Income Before Income Taxes166
 201

86
 317
Income Tax Expense37
 62
 32
 124
Net Income$129
 $139

$54
 $193
Other Comprehensive Income, net of tax       
Unrealized loss from hedging activities of equity method investments
 
 
 (3)
Reclassification into earnings from hedging activities of equity method investments
 
 
 4
Other Comprehensive Income, net of tax
 
 
 1
Comprehensive Income$129
 $139
 $54
 $194
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$
 $19
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)266
 275
Receivables from affiliated companies22
 7
Inventory70
 66
Regulatory assets54
 95
Other19
 52
Total current assets431
 514
Property, Plant and Equipment   
Cost7,486
 6,725
Accumulated depreciation and amortization(1,575) (1,479)
Net property, plant and equipment5,911
 5,246
Other Noncurrent Assets   
Goodwill49
 49
Regulatory assets303
 283
Investments in equity method unconsolidated affiliates64
 61
Other52
 65
Total other noncurrent assets468
 458
Total Assets$6,810
 $6,218
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$203
 $125
Accounts payable to affiliated companies38
 13
Notes payable to affiliated companies198
 364
Taxes accrued84
 19
Interest accrued31
 31
Current maturities of long-term debt350
 250
Regulatory liabilities37
 3
Other58
 69
Total current liabilities999
 874
Long-Term Debt1,788
 1,787
Other Noncurrent Liabilities   
Deferred income taxes551
 564
Asset retirement obligations19
 15
Regulatory liabilities1,181
 1,141
Accrued pension and other post-retirement benefit costs4
 5
Other177
 170
Total other noncurrent liabilities1,932
 1,895
Commitments and Contingencies   
Equity   
Common stock, no par value: 100 shares authorized and outstanding at 2018 and 20171,160
 860
Retained earnings931
 802
Total equity2,091
 1,662
Total Liabilities and Equity$6,810
 $6,218

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31, Two Months Ended December 31, Year Ended October 31,
(in millions)2018
 2017
 2016
 2016
CASH FLOWS FROM OPERATING ACTIVITIES       
Net income$129
 $139
 $54
 $193
Adjustments to reconcile net income to net cash provided by operating activities:       
Depreciation and amortization161
 151
 25
 148
Gains on sales of other assets
 
 
 (133)
Impairment charges
 7
 
 
Deferred income taxes(31) 154
 26
 74
Equity in (earnings) losses from unconsolidated affiliates(7) 6
 (2) (29)
Accrued pension and other post-retirement benefit costs(4) 23
 5
 3
Contributions to qualified pension plans
 (11) (10) (14)
Payments for asset retirement obligations
 
 (1) (6)
Provision for rate refunds43
 
 
 
(Increase) decrease in       
Receivables7
 (40) (157) 12
Receivables from affiliated companies(15) 
 
 (7)
Inventory(4) 
 (11) 14
Other current assets71
 (20) 8
 (98)
Increase (decrease) in       
Accounts payable15
 (13) 35
 6
Accounts payable to affiliated companies25
 5
 4
 6
Taxes accrued65
 (48) (2) 38
Other current liabilities21
 (9) 2
 28
Other assets6
 7
 (7) (91)
Other liabilities(4) (2) 5
 180
Net cash provided by (used in) operating activities478
 349
 (26) 324
CASH FLOWS FROM INVESTING ACTIVITIES       
Capital expenditures(721) (585) (113) (522)
Contributions to equity method investments
 (12) (12) (47)
Proceeds from the sales of other assets
 
 
 175
Other(10) (6) 1
 5
Net cash used in investing activities(731) (603) (124) (389)
CASH FLOWS FROM FINANCING ACTIVITIES       
Proceeds from the:       
Issuance of long-term debt100
 250
 
 295
Issuance of common stock
 
 
 122
Payments for the redemption of long-term debt
 (35) 
 (40)
Notes payable and commercial paper
 (330) 185
 (195)
Notes payable to affiliated companies(166) 364
 
 
Capital contribution from parent300
 
 
 
Dividends to parent
 
 (27) 
Dividends paid
 
 
 (114)
Other
 (1) 
 
Net cash provided by financing activities234
 248
 158
 68
Net (decrease) increase in cash and cash equivalents(19) (6) 8
 3
Cash and cash equivalents at beginning of period19
 25
 17
 14
Cash and cash equivalents at end of period$
 $19
 $25
 $17
Supplemental Disclosures:       
Cash paid for interest, net of amount capitalized$79
 $78
 $11
 $81
Cash received from income taxes(16) (12) 
 (25)
Significant non-cash transactions:       
Accrued capital expenditures96
 34
 48
 63
Transfer of ownership interest of certain equity method investees to parent
 149
 
 

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
     Accumulated  
     Other  
       Comprehensive   
     Income (Loss)  
     Net Gain on
  
     Hedging Activities
  
 Common
 Retained
 of Unconsolidated
 Total
(in millions)Stock
 Earnings
 Affiliates
 Equity
Balance at October 31, 2015$721
 $706
 $(1) $1,426
Net income  
 193
 
 193
Other comprehensive income
 
 1
 1
Common stock issuances, including dividend reinvestment and employee benefits139
 
 
 139
Common stock dividends
 (114) 
 (114)
Balance at October 31, 2016$860
 $785
 $
 $1,645
Net income
 54
 
 54
Dividends to parent
 (27) 
 (27)
Balance at December 31, 2016$860
 $812
 $
 $1,672
Net income
 139
 
 139
Transfer of ownership interest of certain equity method investees to parent
 (149) 
 (149)
Balance at December 31, 2017$860
 $802
 $
 $1,662
Net income  

 129
 
 129
Contribution from parent300
 
 
 300
Balance at December 31, 2018$1,160
 $931
 $
 $2,091
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Index to Combined Notes To Consolidated Financial Statements
The notes to the consolidated financial statements are a combined presentation. The following table indicates the registrants to which the notes apply.
 Applicable Notes
Registrant1234567891011121314151617181920212223242526
Duke Energy 
Duke Energy Carolinas   
Progress Energy    
Duke Energy Progress     
Duke Energy Florida     
Duke Energy Ohio     
Duke Energy Indiana    
Piedmont     
Tables within the notes may not sum across due to (i) Progress Energy's consolidation of Duke Energy Progress, Duke Energy Florida and other subsidiaries that are not registrants and (ii) subsidiaries that are not registrants but included in the consolidated Duke Energy balances.
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Nature of Operations and Basis of Consolidation
Duke Energy is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the FERC and other regulatory agencies listed below. Duke Energy operates in the U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas; Progress Energy; Duke Energy Progress; Duke Energy Florida; Duke Energy Ohio; Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
In October 2016, Duke Energy completed the acquisition of Piedmont. Duke Energy's consolidated financial statements include Piedmont's results of operations and cash flows activity subsequent to the acquisition date. Effective November 1, 2016, Piedmont's fiscal year-end was changed from October 31 to December 31, the year-end of Duke Energy. A transition report was filed on Form 10-Q (Form 10-QT) for the transition period from November 1, 2016, to December 31, 2016. See Note 2 for additional information regarding the acquisition.
In December 2016, Duke Energy completed an exit of the Latin American market to focus on its domestic regulated business, which was further bolstered by the acquisition of Piedmont. The sale of the International Energy business segment, excluding an equity method investment in NMC, was completed through two transactions including a sale of assets in Brazil to CTG and a sale of Duke Energy's remaining Latin American assets in Peru, Chile, Ecuador, Guatemala, El Salvador and Argentina to I Squared (collectively, the International Disposal Group). See Note 2 for additional information on the sale of International Energy.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself.
These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 17 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 8 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting.
Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Progress Energy is a public utility holding company, which conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below.
Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is recovered from retail customers and recorded in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the PUCO, KPSC and FERC.
Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC.
Piedmont is a regulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC and FERC.
Certain prior year amounts have been reclassified to conform to the current year presentation.
Other Current Assets and Liabilities
The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5 percent of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2018, or 2017.
   December 31,
(in millions)Location 2018
 2017
Duke Energy     
Income taxes receivableCurrent Assets $729
 $330
Accrued compensationCurrent Liabilities 793
 757
Duke Energy Carolinas     
Accrued compensationCurrent Liabilities $251
 $252
Progress Energy   
  
Income taxes receivableCurrent Assets $66
 $278
Customer depositsCurrent Liabilities 345
 338
Duke Energy Progress   
  
Customer depositsCurrent Liabilities $137
 $129
Accrued compensationCurrent Liabilities 130
 132
Duke Energy Florida   
  
Customer depositsCurrent Liabilities $208
 $208
Other accrued liabilitiesCurrent Liabilities 85
 16
Duke Energy Ohio   
  
Income taxes receivableCurrent Assets $13
 $36
Customer depositsCurrent Liabilities 44
 46
Duke Energy Indiana   
  
Customer depositsCurrent Liabilities $47
 $45
Piedmont     
Income taxes receivableCurrent Assets $11
 $43
Discontinued Operations
The results of operations of the International Disposal Group have been classified as Discontinued Operations on Duke Energy's Consolidated Statements of Operations. Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. See Note 2 for additional information.
Amounts Attributable to Controlling Interests
For the years ended December 31, 2018, and 2017, the Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations is entirely attributable to controlling interest. For the year ended December 31, 2016, $18 million of net income is attributable to noncontrolling interests, which consisted of $7 million included in Income from Continuing Operations and $11 million included in Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statement of Operations.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Significant Accounting Policies
Use of Estimates
In preparing financial statements that conform to GAAP, the Duke Energy Registrants must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Regulatory Accounting
The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or FERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. See Note 4 for further information.
Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery.
When it becomes probable that regulated generation, transmission or distribution assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment charge for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash flows.
The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Cash, Cash Equivalents and Restricted Cash
All highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents. Duke Energy, Progress Energy and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Note 17 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets.
 December 31, 2018 December 31, 2017
   Duke
   Duke
 Duke
Progress
Energy
 Duke
Progress
Energy
 Energy
Energy
Florida
 Energy
Energy
Florida
Current Assets       
Cash and cash equivalents$442
$67
$36
 $358
$40
$13
Other141
39
39
 138
40
40
Other Noncurrent Assets       
Other8
6

 9
7

Total cash, cash equivalents and restricted cash$591
$112
$75
 $505
$87
$53
Inventory
Inventory is used for operations and is recorded primarily using the average cost method. Inventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Materials and supplies are recorded as inventory when purchased and subsequently charged to expense or capitalized to property, plant and equipment when installed. Inventory, including excess or obsolete inventory, is written-down to the lower of cost or market value. Once inventory has been written-down, it creates a new cost basis for the inventory that is not subsequently written-up. Provisions for inventory write-offs were not material at December 31, 2018, and 2017. The components of inventory are presented in the tables below.
 December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,238
 $731
 $1,049
 $734
 $315
 $84
 $312
 $2
Coal491
 175
 192
 106
 86
 14
 109
 
Natural gas, oil and other355
 42
 218
 114
 103
 28
 1
 68
Total inventory$3,084
 $948
 $1,459
 $954
 $504
 $126
 $422
 $70
 December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,293
 $744
 $1,118
 $774
 $343
 $82
 $309
 $2
Coal603
 192
 255
 139
 116
 17
 139
 
Natural gas, oil and other354
 35
 219
 104
 115
 34
 2
 64
Total inventory$3,250
 $971
 $1,592
 $1,017
 $574
 $133
 $450
 $66
Investments in Debt and Equity Securities
The Duke Energy Registrants classify investments in equity securities as FV-NI and investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in AOCI until realized, except OTTIs that are included in earnings immediately. At the time gains and losses for debt securities are realized, they are reported through net income. For certain investments of regulated operations, such as substantially all of the NDTF, realized and unrealized gains and losses (including any OTTIs) on debt securities are recorded as a regulatory asset or liability. The credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity. See Note 15 for further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Goodwill and Intangible Assets
Goodwill
Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be a business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 11 for further information.
Intangible Assets
Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an amortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced.
Emission allowances permit the holder of the allowance to emit certain gaseous byproducts of fossil fuel combustion, including SO2 and NOX. Allowances are issued by the EPA at zero cost and may also be bought and sold via third-party transactions. Allowances allocated to or acquired by the Duke Energy Registrants are held primarily for consumption. Carrying amounts for emission allowances are based on the cost to acquire the allowances or, in the case of a business combination, on the fair value assigned in the allocation of the purchase price of the acquired business. Emission allowances are expensed to Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.
RECs are used to measure compliance with renewable energy standards and are held primarily for consumption. See Note 11 for further information.
Long-Lived Asset Impairments
The Duke Energy Registrants evaluate long-lived assets, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the long-lived asset is not recoverable based on these estimated future undiscounted cash flows, the carrying value of the asset is written-down to its then-current estimated fair value and an impairment charge is recognized.
The Duke Energy Registrants assess fair value of long-lived assets using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are not limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset.
Equity Method Investment Impairments
Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method. Equity method investments are assessed for impairment when conditions exist thatwhenever events or changes in circumstances indicate that the fair valuecarrying amount of the investment is less than book value.  Itmay not be recoverable. If the decline in value is considered to be other than temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment.
Impairment assessments use a discounted cash flow income approach and include consideration of the severity and duration of any decline in the fair value of the investments. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. Key inputs that involve estimates and significant management judgment include cash flow projections, selection of a discount rate, probability weighting of potential outcomes, and whether any decline in value is considered temporary.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Property, Plant and Equipment
Property, plant and equipment are stated at the lower of depreciated historical cost net of any disallowances or fair value, if impaired. The Duke Energy Registrants capitalize all construction-related direct labor and material costs, as well as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction and Interest Capitalized” for information on capitalized financing costs. Costs of renewals and betterments that extend the useful life of property, plant and equipment are also capitalized. The cost of repairs, replacements and major maintenance projects, which do not extend the useful life or increase the expected output of the asset, are expensed as incurred. Depreciation is generally computed over the estimated useful life of the asset using the composite straight-line method. Depreciation studies are conducted periodically to update composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows.
 Years Ended December 31,
 2018
 2017
 2016
Duke Energy3.0% 2.8% 2.8%
Duke Energy Carolinas2.8% 2.8% 2.8%
Progress Energy2.9% 2.6% 2.7%
Duke Energy Progress2.9% 2.6% 2.6%
Duke Energy Florida3.0% 2.8% 2.8%
Duke Energy Ohio2.8% 2.8% 2.6%
Duke Energy Indiana3.3% 3.0% 3.1%
Piedmont(a)
2.5% 2.3%  
(a)Piedmont's weighted average depreciation rate was 2.4 percent for the annualized two months ended December 31, 2016, and for the year ended October 31, 2016.
In general, when the Duke Energy Registrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in advance of its original expected useful life or is abandoned, the cost of the asset and the corresponding accumulated depreciation is recognized as a separate asset. If the asset is still in operation, the net amount is classified as Generation facilities to be retired, net on the Consolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of long-lived asset impairments above). When it becomes probable an asset will be abandoned, the cost of the asset and accumulated depreciation is reclassified to Regulatory assets on the Consolidated Balance Sheets for amounts recoverable in rates. The carrying value of the asset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, an impairment is recognized to the extent the net book value of the asset exceeds the present value of future revenues discounted at the incremental borrowing rate.
When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body. See Note 10 for additional information.
Nuclear Fuel
Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets.
Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method.
Allowance for Funds Used During Construction and Interest Capitalized
For further information, see Notes 10regulated operations, the debt and 12equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets.
AFUDC equity, a permanent difference for income taxes, reduces the ETR when capitalized and increases the ETR when depreciated or amortized. See Note 23 for additional information.
For nonregulated operations, interest is capitalized during the construction phase with an offsetting non-cash credit to Interest Expense on the Consolidated Statements of Operations.
Asset Retirement Obligations
AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the Consolidated Financial Statements, "Property, Plantcost of the associated asset and Equipment"depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be probable of recovery.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


The present value of the initial obligation and “Investmentssubsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in Unconsolidated Affiliates,” respectively.regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or liability.
Obligations for nuclear decommissioning are based on site-specific cost studies. Duke Energy Carolinas and Duke Energy Progress assume prompt dismantlement of the nuclear facilities after operations are ceased. Duke Energy Florida assumes Crystal River Unit 3 will be placed into a safe storage configuration until eventual dismantlement is completed by 2074. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida also assume that spent fuel will be stored on-site until such time that it can be transferred to a yet to be built DOE facility.
Obligations for closure of ash basins are based upon discounted cash flows of estimated costs for site-specific plans, if known, or probability weightings of the potential closure methods if the closure plans are under development and multiple closure options are being considered and evaluated on a site-by-site basis. See Note 9 for additional information.
Revenue RecognitionLIQUIDITY AND CAPITAL RESOURCES
RevenuesSources and Uses of Cash
Duke Energy relies primarily upon cash flows from operations, debt and equity issuances and its existing cash and cash equivalents to fund its liquidity and capital requirements. Duke Energy’s capital requirements arise primarily from capital and investment expenditures, repaying long-term debt and paying dividends to shareholders.
Among other provisions, the Tax Act lowers the corporate federal income tax rate from 35 to 21 percent and eliminates bonus depreciation for regulated utilities. For Duke Energy’s regulated operations, the reduction in federal income taxes is expected to result in lower regulated customer rates. However, due to its existing NOL position and other tax credits, Duke Energy does not expect to be a significant federal cash tax payer through at least 2022. As a result, any reduction in customer rates could cause a material reduction in consolidated cash flows from operations in the short term. Over time, the reduction in deferred tax liabilities resulting from the Tax Act will increase Duke Energy’s regulated rate base investments and customer rates. Impacts of Tax Act to Duke Energy’s cash flows and credit metrics are subject to the regulatory actions of its state commissions and the FERC. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
The Subsidiary Registrants generally maintain minimal cash balances and use short-term borrowings to meet their working capital needs and other cash requirements. The Subsidiary Registrants, excluding Progress Energy (Parent), support their short-term borrowing needs through participation with Duke Energy and certain of its other subsidiaries in a money pool arrangement. The companies with short-term funds may provide short-term loans to affiliates participating under this arrangement. See Note 6 to the Consolidated Financial Statements, “Debt and Credit Facilities,” for additional discussion of the money pool arrangement.



MD&ALIQUIDITY AND CAPITAL RESOURCES


Duke Energy and the Subsidiary Registrants, excluding Progress Energy (Parent), may also use short-term debt, including commercial paper and the money pool, as a bridge to long-term debt financings. The levels of borrowing may vary significantly over the course of the year due to the timing of long-term debt financings and the impact of fluctuations in cash flows from operations. From time to time, Duke Energy’s current liabilities exceed current assets resulting from the use of short-term debt as a funding source to meet scheduled maturities of long-term debt, as well as cash needs, which can fluctuate due to the seasonality of its businesses.
Equity Issuance
In order to strengthen its balance sheet and credit metrics and bolster cash flows, Duke Energy plans to issue $500 million of common stock equity per year through 2023 through the DRIP and ATM programs. See Note 19 to the Consolidated Financial Statements, "Common Stock," for further information regarding Duke Energy's equity issuances in 2018.
Credit Facilities and Registration Statements
See Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding credit facilities and shelf registration statements available to Duke Energy and the Duke Energy Registrants.
CAPITAL EXPENDITURES
Duke Energy continues to focus on reducing risk and positioning its business for future success and will invest principally in its strongest business sectors. Duke Energy’s projected capital and investment expenditures, including debt AFUDC and capitalized interest, for the next three fiscal years are included in the table below.
(in millions)2019
2020
2021
New generation$375
$125
$220
Regulated renewables415
410
710
Environmental240
125
35
Nuclear fuel430
505
390
Major nuclear305
315
250
Customer additions505
480
475
Grid modernization and other transmission and distribution projects2,835
3,160
2,980
Maintenance and other3,395
2,605
2,390
Total Electric Utilities and Infrastructure8,500
7,725
7,450
Gas Utilities and Infrastructure1,675
2,000
1,600
Commercial Renewables and Other925
825
625
Total projected capital and investment expenditures$11,100
$10,550
$9,675
DEBT MATURITIES
See Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding significant components of Current Maturities of Long-Term Debt on the Consolidated Balance Sheets.
DIVIDEND PAYMENTS
In 2018, Duke Energy paid quarterly cash dividends for the 92nd consecutive year and expects to continue its policy of paying regular cash dividends in the future. There is no assurance as to the amount of future dividends because they depend on future earnings, capital requirements, financial condition and are subject to the discretion of the Board of Directors.
Duke Energy targets a dividend payout ratio of between 65 and 75 percent, based upon adjusted diluted EPS, and expects this trend to continue through 2023. In 2017 and 2018, Duke Energy increased the dividend by approximately 4 percent annually, and the company remains committed to continued growth of the dividend.
Dividend and Other Funding Restrictions of Duke Energy Subsidiaries
As discussed in Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” Duke Energy’s wholly owned public utility operating companies have restrictions on the amount of funds that can be transferred to Duke Energy through dividends, advances or loans as a result of conditions imposed by various regulators in conjunction with merger transactions. Duke Energy Progress and Duke Energy Florida also have restrictions imposed by their first mortgage bond indentures and Articles of Incorporation, which in certain circumstances, limit their ability to make cash dividends or distributions on common stock. Additionally, certain other Duke Energy subsidiaries have other restrictions, such as minimum working capital and tangible net worth requirements pursuant to debt and other agreements that limit the amount of funds that can be transferred to Duke Energy. At December 31, 2018, the amount of restricted net assets of wholly owned subsidiaries of Duke Energy that may not be distributed to Duke Energy in the form of a loan or dividend does not exceed a material amount of Duke Energy’s net assets. Duke Energy does not have any legal or other restrictions on paying common stock dividends to shareholders out of its consolidated equity accounts. Although these restrictions cap the amount of funding the various operating subsidiaries can provide to Duke Energy, management does not believe these restrictions will have a significant impact on Duke Energy’s ability to access cash to meet its payment of dividends on common stock and other future funding obligations.



MD&ALIQUIDITY AND CAPITAL RESOURCES


CASH FLOWS FROM OPERATING ACTIVITIES
Cash flows from operations of Electric Utilities and Infrastructure and Gas Utilities and Infrastructure are primarily driven by sales of electricity and natural gas, respectively, and costs of operations. These cash flows from operations are recognizedrelatively stable and comprise a substantial portion of Duke Energy’s operating cash flows. Weather conditions, working capital and commodity price fluctuations and unanticipated expenses including unplanned plant outages, storms, legal costs and related settlements can affect the timing and level of cash flows from operations.
Duke Energy believes it has sufficient liquidity resources through the commercial paper markets, and ultimately, the Master Credit Facility, to support these operations. Cash flows from operations are subject to a number of other factors, including, but not limited to, regulatory constraints, economic trends and market volatility (see Item 1A, “Risk Factors,” for additional information).
At December 31, 2018, Duke Energy had cash and cash equivalents and short-term investments of $442 million.
DEBT ISSUANCES
Depending on availability based on the issuing entity, the credit rating of the issuing entity, and market conditions, the Subsidiary Registrants prefer to issue first mortgage bonds and secured debt, followed by unsecured debt. This preference is the result of generally higher credit ratings for first mortgage bonds and secured debt, which typically result in lower interest costs. Duke Energy Corporation primarily issues unsecured debt.
In 2019, Duke Energy anticipates issuing additional debt of $7.5 billion, primarily for the purpose of funding capital expenditures and debt maturities. See to Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding significant debt issuances in 2018.
Duke Energy’s capitalization is balanced between debt and equity as shown in the table below.
 Projected 2019
 Actual 2018
 Actual 2017
Equity44% 43% 43%
Debt56% 57% 57%
Restrictive Debt Covenants
Duke Energy’s debt and credit agreements contain various financial and other covenants. Duke Energy's Master Credit Facility contains a covenant requiring the debt-to-total capitalization ratio to not exceed 65 percent for each borrower, excluding Piedmont, and 70 percent for Piedmont. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements or sublimits thereto. As of December 31, 2018, each of the Duke Energy Registrants was in compliance with all covenants related to their debt agreements. In addition, some credit agreements may allow for acceleration of payments or termination of the agreements due to nonpayment, or acceleration of other significant indebtedness of the borrower or some of its subsidiaries. None of the debt or credit agreements contain material adverse change clauses.



MD&ALIQUIDITY AND CAPITAL RESOURCES


Credit Ratings
Moody’s, S&P and Fitch Ratings, Inc. provide credit ratings for various Duke Energy Registrants. The following table includes Duke Energy and certain subsidiaries’ credit ratings and ratings outlook as of February 2019.
Moody'sS&PFitch
Duke Energy CorporationStableStableStable
Issuer Credit RatingBaa1A-BBB+
Senior Unsecured DebtBaa1BBB+BBB+
Commercial PaperP-2A-2F-2
Duke Energy CarolinasStableStableN/A
Senior Secured DebtAa2AN/A
Senior Unsecured DebtA1A-N/A
Progress EnergyStableStableN/A
Senior Unsecured DebtBaa1BBB+N/A
Duke Energy ProgressStableStableN/A
Senior Secured DebtAa3AN/A
Duke Energy FloridaStableStableN/A
Senior Secured DebtA1AN/A
Senior Unsecured DebtA3A-N/A
Duke Energy OhioStableStableN/A
Senior Secured DebtA2AN/A
Senior Unsecured DebtBaa1A-N/A
Duke Energy IndianaStableStableN/A
Senior Secured DebtAa3AN/A
Senior Unsecured DebtA2A-N/A
Duke Energy KentuckyStableStableN/A
Senior Unsecured DebtBaa1A-N/A
Piedmont Natural GasStableStableN/A
Senior UnsecuredA3A-N/A
Credit ratings are intended to provide credit lenders a framework for comparing the credit quality of securities and are not a recommendation to buy, sell or hold. The Duke Energy Registrants’ credit ratings are dependent on the rating agencies’ assessments of their ability to meet their debt principal and interest obligations when servicethey come due. If, as a result of market conditions or other factors, the Duke Energy Registrants are unable to maintain current balance sheet strength, or if earnings and cash flow outlook materially deteriorates, credit ratings could be negatively impacted.
Cash Flow Information
The following table summarizes Duke Energy’s cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
(in millions)2018
 2017
 2016
Cash flows provided by (used in):     
Operating activities$7,186
 $6,624
 $6,863
Investing activities(10,060) (8,442) (11,528)
Financing activities2,960
 1,782
 4,251
Changes in cash and cash equivalents included in assets held for sale
 
 474
Net increase (decrease) in cash, cash equivalents and restricted cash86
 (36) 60
Cash, cash equivalents and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents and restricted cash at end of period$591
 $505
 $541



MD&ALIQUIDITY AND CAPITAL RESOURCES


OPERATING CASH FLOWS
The following table summarizes key components of Duke Energy’s operating cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018

2017
 2017

2016
 2016
Net income$2,644
 $3,064
 $(420) $2,170
 $894
Non-cash adjustments to net income6,484
 5,380
 1,104
 5,305
 75
Contributions to qualified pension plans(141) (19) (122) (155) 136
Payments for AROs(533) (571) 38
 (608) 37
Payment for disposal of other assets(105) 
 (105) 
 
Working capital(1,163) (1,230) 67
 151
 (1,381)
Net cash provided by operating activities$7,186

$6,624
 $562

$6,863
 $(239)
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $684 million increase in net income after adjustment for non-cash items primarily due to favorable weather and increased pricing and volumes in the current period; and
a $38 million decrease in payments to AROs.
Offset by:
a $122 million increase in contributions to qualified pension plans; and
a $105 million payment for disposal of Beckjord.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $1,381 million decrease in working capital due to weather, payment of merger transaction and integration related costs and increased property tax payments in 2017.
Offset by:
a $969 million increase in net income after non-cash adjustments primarily due to the inclusion of Piedmont's earnings for a full year, favorable pricing and weather-normal retail volumes driven by the residential class in the Electric Utilities and Infrastructure segment combined with continued strong cost control;
a $136 million decrease in contributions to qualified pension plans; and
a $37 million decrease in payments to AROs.
INVESTING CASH FLOWS
The following table summarizes key components of Duke Energy’s investing cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018

2017
 2017

2016
 2016
Capital, investment and acquisition expenditures$(9,668) $(8,198) $(1,470) $(13,215) $5,017
Debt and equity securities, net(15) 27
 (42) 83
 (56)
Net proceeds from the sales of discontinued operations and other assets, net of cash divested41
 
 41
 1,418
 (1,418)
Other investing items(418) (271) (147) 186
 (457)
Net cash used in investing activities$(10,060)
$(8,442) $(1,618)
$(11,528) $3,086



MD&ALIQUIDITY AND CAPITAL RESOURCES


The primary use of cash related to investing activities is providedcapital, investment and acquisition expenditures, detailed by reportable business segment in the following table.
 Years Ended December 31,
(in millions)2018

2017

2016
Electric Utilities and Infrastructure$8,086
 $7,024
 $6,649
Gas Utilities and Infrastructure1,133
 907
 5,519
Commercial Renewables193
 92
 857
Other256
 175
 190
Total capital, investment and acquisition expenditures$9,668

$8,198

$13,215
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $1,470 million increase in capital, investment and acquisition expenditures in all reportable business segments, including expenditures related to W.S. Lee CC, Asheville and Citrus County CC at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $5,017 million decrease in capital, investment and acquisition expenditures mainly due to the Piedmont acquisition in the prior year.
Partially offset by:
a $1,418 million decrease in net proceeds from sales of discontinued operations due to the prior year sale of the International business.
FINANCING CASH FLOWS
The following table summarizes key components of Duke Energy’s financing cash flows for the three most recently completed fiscal years.
 Years Ended December 31,
     Variance
   Variance
     2018 vs.
   2017 vs.
(in millions)2018
 2017
 2017
 2016
 2016
Issuance of common stock$1,838
 $
 $1,838
 $731
 $(731)
Issuances of long-term debt, net2,393
 4,593
 (2,200) 7,315
 (2,722)
Notes payable and commercial paper1,171
 (362) 1,533
 (1,447) 1,085
Dividends paid(2,471) (2,450) (21) (2,332) (118)
Other financing items29
 1
 28
 (16) 17
Net cash provided by financing activities$2,960
 $1,782
 $1,178
 $4,251
 $(2,469)
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $1,838 million increase in proceeds from the issuance of common stock; and
a $1,533 million increase in net borrowings from notes payable and commercial paper primarily due to increased funding requirements for capital expenditures and storm costs.
Partially offset by:
a $2,200 million net decrease in proceeds from issuances of long-term debt primarily due to timing related to refinancing of existing maturities, fund growth and general corporate needs.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $2,722 million net decrease in proceeds from issuances of long-term debt driven principally by the prior year $3,750 million of senior unsecured notes used to fund a portion of the Piedmont acquisition, offset primarily by $900 million of first mortgage bonds issued by Duke Energy Florida in the current year to fund capital expenditures for ongoing construction and capital maintenance and for general corporate purposes;
a $731 million decrease in proceeds from stock issuances used to fund a portion of the Piedmont acquisition in 2016; and
a $118 million current year increase in dividends paid.
Partially offset by:
a $1,085 million decrease in net borrowings from notes payable and commercial paper primarily due to the use of proceeds from $1,294 million nuclear asset-recovery bonds issued at Duke Energy Florida in 2016 to pay down outstanding commercial paper.



MD&AOFF-BALANCE SHEET ARRANGEMENTS AND CONTRACTUAL OBLIGATIONS


Off-Balance Sheet Arrangements
Duke Energy and certain of its subsidiaries enter into guarantee arrangements in the normal course of business to facilitate commercial transactions with third parties. These arrangements include performance guarantees, standby letters of credit, debt guarantees, surety bonds and indemnifications.
Most of the guarantee arrangements entered into by Duke Energy enhance the credit standing of certain subsidiaries, non-consolidated entities or less than wholly owned entities, enabling them to conduct business. As such, these guarantee arrangements involve elements of performance and credit risk, which are not always included on the Consolidated Balance Sheets. The possibility of Duke Energy, either on its own or on behalf of Spectra Energy Capital, LLC (Spectra Capital) through indemnification agreements entered into as part of the January 2, 2007, spin-off of Spectra Energy Corp, having to honor its contingencies is largely dependent upon the future operations of the subsidiaries, investees and other third parties, or the productoccurrence of certain future events.
Duke Energy performs ongoing assessments of its respective guarantee obligations to determine whether any liabilities have been incurred as a result of potential increased non-performance risk by third parties for which Duke Energy has issued guarantees. See Note 7 to the Consolidated Financial Statements, “Guarantees and Indemnifications,” for further details of the guarantee arrangements. Issuance of these guarantee arrangements is delivered. As retail metersnot required for the majority of Duke Energy’s operations. Thus, if Duke Energy discontinued issuing these guarantees, there would not be a material impact to the consolidated results of operations, cash flows or financial position.
Other than the guarantee arrangements discussed above, normal operating lease arrangements and off-balance sheet debt related to non-consolidated VIEs, Duke Energy does not have any material off-balance sheet financing entities or structures. For additional information, see Notes 5 and 17 to the Consolidated Financial Statements, “Commitments and Contingencies" and "Variable Interest Entities," respectively.
Contractual Obligations
Duke Energy enters into contracts that require payment of cash at certain specified periods, based on certain specified minimum quantities and prices. The following table summarizes Duke Energy’s contractual cash obligations as of December 31, 2018.
 Payments Due By Period
         More than
   Less than
 2-3 years
 4-5 years
 5 years
   1 year
 (2020 &
 (2022 &
 (2024 &
(in millions)Total
 (2019)
 2021)
 2023)
 beyond)
Long-term debt(a)
$52,446
 $3,291
 $8,311
 $5,861
 $34,983
Interest payments on long-term debt(b)
32,834
 2,121
 3,823
 3,329
 23,561
Capital leases(c)
1,428
 170
 351
 330
 577
Operating leases(c)
1,991
 239
 405
 330
 1,017
Purchase obligations:(d)
 
  
  
  
  
Fuel and purchased power(e)(f)
20,496
 4,329
 5,315
 3,153
 7,699
Other purchase obligations(g)
12,436
 4,617
 1,178
 775
 5,866
Nuclear decommissioning trust annual funding(h)
482
 24
 48
 48
 362
Land easements(i)
234
 10
 20
 20
 184
Total contractual cash obligations(j)(k)
$122,347
 $14,801
 $19,451
 $13,846
 $74,249
(a)See Note 6 to the Consolidated Financial Statements, “Debt and Credit Facilities.”
(b)Interest payments on variable rate debt instruments were calculated using December 31, 2018, interest rates and holding them constant for the life of the instruments.
(c)See Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies.” Amounts in the table above include the interest component of capital leases based on the interest rates stated in the lease agreements and exclude certain related executory costs. Amounts exclude contingent lease obligations.
(d)Current liabilities, except for current maturities of long-term debt, and purchase obligations reflected on the Consolidated Balance Sheets have been excluded from the above table.
(e)Includes firm capacity payments that provide Duke Energy with uninterrupted firm access to electricity transmission capacity and natural gas transportation contracts, as well as undesignated contracts and contracts that qualify as NPNS. For contracts where the price paid is based on an index, the amount is based on market prices at December 31, 2018, or the best projections of the index. For certain of these amounts, Duke Energy may settle on a net cash basis since Duke Energy has entered into payment netting arrangements with counterparties that permit Duke Energy to offset receivables and payables with such counterparties.
(f)Amounts exclude obligations under the OVEC purchase power agreement. See Note 17 to the Consolidated Financial Statements, "Variable Interest Entities," for additional information.
(g)Includes contracts for software, telephone, data and consulting or advisory services. Amount also includes contractual obligations for EPC costs for new generation plants, wind and solar facilities, plant refurbishments, maintenance and day-to-day contract work and commitments to buy certain products. Amount excludes certain open purchase orders for services that are provided on demand, for which the timing of the purchase cannot be determined.
(h)Related to future annual funding obligations to NDTF through nuclear power stations' relicensing dates. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations."
(i)Related to Commercial Renewables wind and solar facilities.



MD&AOFF-BALANCE SHEET ARRANGEMENTS AND CONTRACTUAL OBLIGATIONS


(j)Unrecognized tax benefits of $24 million are not reflected in this table as Duke Energy cannot predict when open income tax years will close with completed examinations. See Note 23 to the Consolidated Financial Statements, "Income Taxes."
(k)The table above excludes reserves for litigation, environmental remediation, asbestos-related injuries and damages claims and self-insurance claims (see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies”) because Duke Energy is uncertain as to the timing and amount of cash payments that will be required. Additionally, the table above excludes annual insurance premiums that are necessary to operate the business, including nuclear insurance (see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies”), funding of pension and other post-retirement benefit plans (see Note 22 to the Consolidated Financial Statements, "Employee Benefit Plans"), AROs, including ash management expenditures (see Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations") and regulatory liabilities (see Note 4 to the Consolidated Financial Statements, “Regulatory Matters”) because the amount and timing of the cash payments are uncertain. Also excluded are Deferred Income Taxes and ITCs recorded on the Consolidated Balance Sheets since cash payments for income taxes are determined based primarily on taxable income for each discrete fiscal year.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Risk Management Policies
The Enterprise Risk Management policy framework at Duke Energy includes strategy, operational, project execution and financial or transaction related risks. Enterprise Risk Management includes market risk as part of the financial and transaction related risks in its framework.
Duke Energy is exposed to market risks associated with commodity prices, interest rates and equity prices. Duke Energy has established comprehensive risk management policies to monitor and manage these market risks. Duke Energy’s Chief Executive Officer and Chief Financial Officer are read, invoices are preparedresponsible for the overall approval of market risk management policies and the invoicedelegation of approval and authorization levels. The Finance and Risk Management Committee of the Board of Directors receives periodic updates from the Chief Risk Officer and other members of management on market risk positions, corporate exposures and overall risk management activities. The Chief Risk Officer is responsible for the overall governance of managing commodity price risk, including monitoring exposure limits.
The following disclosures about market risk contain forward-looking statements that involve estimates, projections, goals, forecasts, assumptions, risks and uncertainties that could cause actual results or outcomes to differ materially from those expressed in the forward-looking statements. See Item 1A, “Risk Factors,” and “Cautionary Statement Regarding Forward-Looking Information” for a discussion of the factors that may impact any such forward-looking statements made herein.
Commodity Price Risk
Duke Energy is exposed to the impact of market fluctuations in the prices of electricity, coal, natural gas and other energy-related products marketed and purchased as a result of its ownership of energy-related assets. Duke Energy’s exposure to these fluctuations is limited by the cost-based regulation of its regulated operations as these operations are typically allowed to recover substantially all of these costs through various cost-recovery clauses, including fuel clauses, formula based contracts, or other cost-sharing mechanisms. While there may be a delay in timing between when these costs are incurred and when they are recovered through rates, changes from year to year generally do not have a material impact on operating results of these regulated operations.
Price risk represents the potential risk of loss from adverse changes in the market price of electricity or other energy commodities. Duke Energy’s exposure to commodity price risk is influenced by a number of factors, including contract size, length, market liquidity, location and unique or specific contract terms. Duke Energy employs established policies and procedures to manage risks associated with these market fluctuations, which may include using various commodity derivatives, such as swaps, futures, forwards and options. For additional information, see Note 14 to the Consolidated Financial Statements, “Derivatives and Hedging.”
The inputs and methodologies used to determine the fair value of contracts are validated by an internal group separate from Duke Energy’s deal origination function. While Duke Energy uses common industry practices to develop its valuation techniques, changes in its pricing methodologies or the underlying assumptions could result in significantly different fair values and income recognition.
Hedging Strategies
Duke Energy closely monitors risks associated with commodity price changes on its future operations and, where appropriate, uses various commodity instruments such as electricity, coal and natural gas forward contracts and options to mitigate the effect of such fluctuations on operations. Duke Energy’s primary use of energy commodity derivatives is to hedge against exposure to the prices of power, fuel for generation and natural gas for customers.
The majority of instruments used to manage Duke Energy’s commodity price exposure are either not designated as hedges or do not qualify for hedge accounting. These instruments are referred to as undesignated contracts. Mark-to-market changes for undesignated contracts entered into by regulated businesses are reflected as regulatory assets or liabilities on the Consolidated Balance Sheets. Undesignated contracts entered into by unregulated businesses are marked-to-market each period, with changes in the fair value of the derivative instruments reflected in earnings.
Duke Energy may also enter into other contracts that qualify for the NPNS exception. When a contract meets the criteria to qualify as NPNS, Duke Energy applies such exception. Income recognition and realization related to NPNS contracts generally coincide with the physical delivery of the commodity. For contracts qualifying for the NPNS exception, no recognition of the contract’s fair value in the Consolidated Financial Statements is required until settlement of the contract as long as the transaction remains probable of occurring.



MD&AQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK


Generation Portfolio Risks 
The Duke Energy Registrants optimize the value of their generation portfolios, which include generation assets, fuel and emission allowances. Modeled forecasts of future generation output and fuel requirements are based on forward power and fuel markets. The component pieces of the portfolio are bought and sold based on models and forecasts of generation in order to manage the economic value of the portfolio in accordance with the strategies of the business units.
For the Electric Utilities and Infrastructure segment, the generation portfolio not utilized to serve retail operations or committed load is subject to commodity price fluctuations. However, the impact on the Consolidated Statements of Operations is partially offset by mechanisms in these regulated jurisdictions that result in the sharing of net profits from these activities with retail customers.
Interest Rate Risk
Duke Energy is exposed to risk resulting from changes in interest rates as a result of its issuance or anticipated issuance of variable and fixed-rate debt and commercial paper. Duke Energy manages interest rate exposure by limiting variable-rate exposures to a percentage of total debt and by monitoring the effects of market changes in interest rates. Duke Energy also enters into financial derivative instruments, which may include instruments such as, but not limited to, interest rate swaps, swaptions and U.S. Treasury lock agreements to manage and mitigate interest rate risk exposure. See Notes 1, 6, 14 and 16 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” “Debt and Credit Facilities,” “Derivatives and Hedging,” and “Fair Value Measurements.”
At December 31, 2018, Duke Energy had $1.2 billion of U.S. treasury lock agreements, $644 million notional amount of floating-to-fixed swaps outstanding, $500 million notional amount of fixed-to-floating swaps outstanding and $300 million forward-starting swaps outstanding. Duke Energy had $8.0 billion of unhedged long- and short-term floating interest rate exposure at December 31, 2018. The impact of a 100 basis point change in interest rates on pretax income is approximately $80 million at December 31, 2018. This amount was estimated by considering the impact of the hypothetical interest rates on variable-rate securities outstanding, adjusted for interest rate hedges as of December 31, 2018.
See Note 14, "Derivatives and Hedging," to the Consolidated Financial Statements for additional information about the forward-starting interest rate swaps related to the Piedmont acquisition.
Credit Risk
Credit risk represents the loss that the Duke Energy Registrants would incur if a counterparty fails to perform under its contractual obligations. Where exposed to credit risk, the Duke Energy Registrants analyze the counterparty's financial condition prior to entering into an agreement and monitor exposure on an ongoing basis. The Duke Energy Registrants establish credit limits where appropriate in the context of contractual arrangements and monitor such limits.
To reduce credit exposure, the Duke Energy Registrants seek to include netting provisions with counterparties, which permit the offset of receivables and payables with such counterparties. The Duke Energy Registrants also frequently use master agreements with credit support annexes to further mitigate certain credit exposures. The master agreements provide for a counterparty to post cash or letters of credit to the exposed party for exposure in excess of an established threshold. The threshold amount represents a negotiated unsecured credit limit for each party to the agreement, determined in accordance with the Duke Energy Registrants’ internal corporate credit practices and standards. Collateral agreements generally recognized as "billed" revenue. Operating revenues also include "unbilled"provide that the inability to post collateral is sufficient cause to terminate contracts and liquidate all positions.
The Duke Energy Registrants also obtain cash or letters of credit from certain counterparties to provide credit support outside of collateral agreements, where appropriate, based on a financial analysis of the counterparty and the regulatory or contractual terms and conditions applicable to each transaction. See Note 14 to the Consolidated Financial Statements, “Derivatives and Hedging,” for additional information regarding credit risk related to derivative instruments.
The Duke Energy Registrants’ principal counterparties for its electric and natural gas revenuesbusinesses are regional transmission organizations, distribution companies, municipalities, electric cooperatives and utilities located throughout the U.S. The Duke Energy Registrants have concentrations of receivables from such entities throughout these regions. These concentrations of receivables may affect the Duke Energy Registrants’ overall credit risk in that risk factors can negatively impact the credit quality of the entire sector.
The Duke Energy Registrants are also subject to credit risk from transactions with their suppliers that involve prepayments in conjunction with outsourcing arrangements, major construction projects and certain commodity purchases. The Duke Energy Registrants’ credit exposure to such suppliers may take the form of increased costs or project delays in the event of non-performance. The Duke Energy Registrants' frequently require guarantees or letters of credit from suppliers to mitigate this credit risk.
Credit risk associated with the Duke Energy Registrants’ service to residential, commercial and industrial customers is generally limited to outstanding accounts receivable. The Duke Energy Registrants mitigate this credit risk by requiring customers to provide a cash deposit, letter of credit or surety bond until a satisfactory payment history is established, subject to the rules and regulations in effect in each retail jurisdiction, at which time the deposit is typically refunded. Charge-offs for retail customers have historically been insignificant to the amountoperations of service provided or product delivered after the last meter readingDuke Energy Registrants and are typically recovered through retail rates. Management continually monitors customer charge-offs and payment patterns to ensure the adequacy of bad debt reserves. Duke Energy Ohio and Duke Energy Indiana sell certain of their accounts receivable and related collections through CRC, a Duke Energy consolidated variable interest entity. Losses on collection are first absorbed by the equity of CRC and next by the subordinated retained interests held by Duke Energy Ohio, Duke Energy Kentucky and Duke Energy Indiana. See Note 17 to the Consolidated Financial Statements, “Variable Interest Entities.” Duke Energy also provides certain non-tariff services, primarily to large commercial and industrial customers, in which incurred costs are intended to be recovered from the individual customer and therefore are not subject to rate recovery in the event of customer default. Customer credit worthiness is assessed prior to the end of the accounting period. Unbilled retail revenues are estimated by applying an average revenue per kilowatt-hour (kWh), per thousand cubic feet (Mcf) or per dekatherm (dth) for all customer classes to the number of estimated kWh, Mcf or dth delivered but not yet billed.entering into these transactions.
For wholesale customers, the invoice amount is generally recognized as “billed” revenue. Although meters are read as of the end of the month, invoices have typically not been prepared. An estimate of the wholesale invoice is included in the reported amount of “unbilled” revenue.



68

MD&AQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

PART II

Duke Energy’s Commercial Renewables business segment enters into long-term agreements with certain creditworthy buyers that may not include the right to call for collateral in the event of a credit rating downgrade, and is therefore exposed to market price risk and credit risk related to these agreements. Credit concentration exists to certain counterparties on these agreements.
Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. See Note 5 to the Consolidated Financial Statements, "Commitments and Contingencies" for information on asbestos-related injuries and damages claims.
The amountDuke Energy Registrants also have credit risk exposure through issuance of unbilled revenues can vary significantlyperformance and financial guarantees, letters of credit and surety bonds on behalf of less than wholly owned entities and third parties. Where the Duke Energy Registrants have issued these guarantees, it is possible that they could be required to perform under these guarantee obligations in the event the obligor under the guarantee fails to perform. Where the Duke Energy Registrants have issued guarantees related to assets or operations that have been disposed of via sale, they attempt to secure indemnification from periodthe buyer against all future performance obligations under the guarantees. See Note 7 to periodthe Consolidated Financial Statements, “Guarantees and Indemnifications,” for further information on guarantees issued by the Duke Energy Registrants.
Based on the Duke Energy Registrants’ policies for managing credit risk, their exposures and their credit and other reserves, the Duke Energy Registrants do not currently anticipate a materially adverse effect on their consolidated financial position or results of operations as a result of numerous factors that impactnon-performance by any counterparty.
Marketable Securities Price Risk
As described further in Note 15 to the changeConsolidated Financial Statements, “Investments in Debt and Equity Securities,” Duke Energy invests in debt and equity securities as part of various investment portfolios to fund certain obligations. The vast majority of investments in equity securities are within the unbilled revenue receivable balance, including seasonality, weather, customer usage patterns, customer mix, timingNDTF and assets of rendering customer bills, meter readings schedules and the average price in effect for customer classes.
Pension and Other Post-Retirement Benefits
The calculation of pension expense, other post-retirement benefit expense and netvarious pension and other post-retirement assets or liabilities require the use of assumptions and election of permissible accounting alternatives. Changes in assumptions can result in different expense and reported asset or liability amounts and future actual experience can differ from the assumptions. Duke Energy believes the most critical assumptions for pension and other post-retirement benefits are the expected long-term rate of return on plan assets and the assumed discount rate applied to future projected benefit payments. Additionally, the health care cost trend rate assumption is critical to Duke Energy’s estimate of other post-retirement benefits.plans.
Duke Energy elects to amortize net actuarial gain or loss amounts that are in excess of 10 percent of the greater of the market-related value of plan assets or the plan's projected benefit obligation, into net pension or other post-retirement benefit expense over the average remaining service period of active participants expected to benefit under the plan. If all or almost all of a plan's participants are inactive, the average remaining life expectancy of the inactive participants is used instead of average remaining service period. Prior service cost or credit, which represents an increase or decrease in a plan's pension benefit obligation resulting from plan amendment, is amortized on a straight-line basis over the average expected remaining service period of active participants expected to benefit under the plan. If all or almost all of a plan's participants are inactive, the average remaining life expectancy of the inactive participants is used instead of average remaining service period.Pension Plan Assets
Duke Energy maintains andinvestments to facilitate funding the Subsidiary Registrants participate in, qualified,costs of providing non-contributory defined benefit retirement plans. Most participants in the qualified plans earn benefits calculated using a cash balance formula. Under a cash balance formula, a plan participant accumulates a retirement benefit consisting of pay credits based upon a percentage, which varies with age and years of service, of current eligible earnings and current interest credits. Certain plan participants earn benefits that use a final average earnings formula. Certain executives are participants in non-qualified, non-contributory defined benefit retirement plans. These qualified and non-qualified, non-contributory defined benefit plans are closed to new participants.
Duke Energy provides some health care and life insurance benefits for retired employees on a contributory and non-contributory basis. Certain employees are eligible for these benefits if they have met age and service requirements at retirement, as defined in the plans.
Assets for Duke Energy’s qualified pension and other post-retirement benefits (401(h) accounts)benefit plans. These investments are maintainedexposed to price fluctuations in the Duke Energy Master Retirement Trust (Master Trust). Duke Energy also invests other post-retirement assetsequity markets and changes in Voluntary Employees' Beneficiary Association trusts.interest rates. The investment objective is to achieve sufficient returns, subject to a prudent level of portfolio risk, for the purpose of promoting the security of plan benefits for participants.
As of December 31, 2017, Duke Energy assumesequity securities held in these pension and other post-retirement plan assets will generate a long-term rate of return of 6.50 percent. The expected long-term rate of return was developed using a weighted average calculation of expected returns based primarily on future expected returns across asset classes considering the use of active asset managers, where applicable. The asset allocation targets were set after considering the investment objective and the risk profile. Equity securities are held for their higher expected returns. Debt securities are primarily held to hedge the qualified pension liability. Hedge funds, real estate and other global securities are held for diversification. Investments within asset classesplans are diversified to achieve broad market participation and reduce the impact of individual managers on investments. 
In 2013,any single investment, sector or geographic region. Duke Energy adopted a de-risking investment strategy for the Master Trust. As the funded status of the pension plans increase, the targeted allocation to fixed-income assets may be increased to better manage Duke Energy's pension liability and reduce funded status volatility. Thehas established asset allocation targets for its pension plan holdings, which take into consideration the Master Trust is 63 percent fixed-income assetsinvestment objectives and 37 percent return-seeking assets. Duke Energy regularly reviews its actual asset allocation and periodically rebalances its investmentsthe risk profile with respect to the targeted allocations when considered appropriate.
Duke Energy discounted its future U.S. pension and other post-retirement obligations using a rate of 3.6 percent as of December 31, 2017. Discount rates used to measure benefit plan obligations for financial reporting purposes reflect rates attrust in which pension benefits could be effectively settled. As of December 31, 2017, Duke Energy determined its discount rate for U.S. pension and other post-retirement obligations using a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected.
Future changes in plan asset returns, assumed discount rates and various other factors related to the participants in Duke Energy’s pension and post-retirement plans will impact future pension expense and liabilities. Duke Energy cannot predict with certainty what these factors will be in the future. The following table presents the approximate effect on Duke Energy’s 2017 pretax pension expense, pretax other post-retirement expense, pension obligation and other post-retirement benefit obligation if a 0.25 percent change in rates were to occur.
 Qualified and Non- Other Post-Retirement
 Qualified Pension Plans Plans
(in millions)0.25% (0.25)% 0.25% (0.25)%
Effect on 2017 pretax pension and other post-retirement expense       
Expected long-term rate of return$(21) $21
 $(1) $1
Discount rate(17) 19
 (1) 1
Effect on pension and other post-retirement benefit obligation at December 31, 2017 
  
  
  
Discount rate(223) 229
 (17) 17

69


PART II

Duke Energy’s other post-retirement plan uses a health care trend rate covering both pre- and post-age 65 retired plan participants, which is comprised of a medical care trend rate, which reflects the near- and long-term expectation of increases in medical costs, and a prescription drug trend rate, which reflects the near- and long-term expectation of increases in prescription drug costs. As of December 31, 2017, the health care trend rate was 7 percent, trending down to 4.75 percent by 2024. The following table presents the approximate effect on Duke Energy’s 2017 pretax other post-retirement expense and other post-retirement benefit obligation if a 1 percentage point change in the health care trend rate were to occur. These plansassets are closed to new hires.
 Other Post-Retirement
 Plans
(in millions)1% (1)%
Effect on 2017 other post-retirement expense$5
 $(4)
Effect on other post-retirement benefit obligation at December 31, 201727
 (24)
For further information, seeheld. See Note 2122 to the Consolidated Financial Statements, “Employee Benefit Plans.Plans, for additional information regarding investment strategy of pension plan assets.
Income TaxesA significant decline in the value of plan asset holdings could require Duke Energy to increase funding of its pension plans in future periods, which could adversely affect cash flows in those periods. Additionally, a decline in the fair value of plan assets, absent additional cash contributions to the plan, could increase the amount of pension cost required to be recorded in future periods, which could adversely affect Duke Energy’s results of operations in those periods.
Nuclear Decommissioning Trust Funds
As required by the NRC, NCUC, PSCSC and FPSC, subsidiaries of Duke Energy maintain trust funds to fund the costs of nuclear decommissioning. As of December 31, 2018, these funds were invested primarily in domestic and international equity securities, debt securities, cash and cash equivalents and short-term investments. Per the NRC, Internal Revenue Code, NCUC, PSCSC and FPSC requirements, these funds may be used only for activities related to nuclear decommissioning. These investments are exposed to price fluctuations in equity markets and changes in interest rates. Duke Energy actively monitors its portfolios by benchmarking the performance of its investments against certain indices and by maintaining, and periodically reviewing, target allocation percentages for various asset classes.
Accounting for nuclear decommissioning recognizes that costs are recovered through retail and wholesale rates; therefore, fluctuations in investment prices do not materially affect the Consolidated Statements of Operations, as changes in the fair value of these investments are primarily deferred as regulatory assets or regulatory liabilities pursuant to Orders by the NCUC, PSCSC, FPSC and FERC. Earnings or losses of the fund will ultimately impact the amount of costs recovered through retail and wholesale rates. See Note 9 to the Consolidated Financial Statements, “Asset Retirement Obligations,” for additional information regarding nuclear decommissioning costs. See Note 15 to the Consolidated Financial Statements, “Investments in Debt and Equity Securities,” for additional information regarding NDTF assets.
OTHER MATTERS
Environmental Regulations
The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. These regulations can be changed from time to time and result in new obligations of the Duke Energy Registrants.
The following sections outline various proposed and recently enacted legislation and regulations that may impact the Duke Energy Registrants. Refer to Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for further information regarding potential plant retirements and regulatory filings related to the Duke Energy Registrants.



MD&AOTHER MATTERS


Coal Combustion Residuals
In April 2015, EPA published a rule to regulate the disposal of CCR from electric utilities as solid waste. The federal regulation classifies CCR as nonhazardous waste and allows for beneficial use of CCR with some restrictions. The regulation applies to all new and existing landfills, new and existing surface impoundments receiving CCR and existing surface impoundments that are no longer receiving CCR but contain liquid located at stations currently generating electricity (regardless of fuel source). The rule establishes requirements regarding landfill design, structural integrity design and assessment criteria for surface impoundments, groundwater monitoring, protection and remedial procedures and other operational and reporting procedures to ensure the safe disposal and management of CCR. Various industry and environmental parties have appealed EPA's CCR rule in the D.C. Circuit Court. On April 18, 2016, EPA filed a motion with the federal court to settle five issues raised in litigation. On June 14, 2016, the court approved the motion with respect to all of those issues. Duke Energy does not expect a material impact from the settlement or that it will result in additional ARO adjustments. On September 13, 2017, EPA responded to a petition by the Utility Solid Waste Activities Group that the agency would reconsider certain provisions of the final rule, and asked the D.C. Circuit Court to suspend the litigation. The D.C. Circuit Court denied EPA’s petition to suspend the litigation and oral argument was held on November 20, 2017. On August 21, 2018, the D.C. Circuit issued its decision in the CCR rule litigation denying relief for industry petitioners' remaining claims and ruling in favor of environmental petitioners on a number of their challenges, including the regulation of inactive CCR surface impoundments at retired plants and the continued operation of unlined impoundments.
On March 15, 2018, EPA published proposed amendments to the federal CCR rule, including revisions that were required as part of a CCR litigation settlement, as well as changes that the agency considers warranted due to the passage of the Water Infrastructure Improvements for the Nation Act, which provides statutory authority for state and federal permit programs. On July 17, 2018, EPA issued a rule (Phase 1, Part 1) finalizing certain, but not all, elements included in the agency's March 15, 2018, proposal. The final rule revises certain closure deadlines and groundwater protection standards in the CCR rule. It does not change the primary requirements for groundwater monitoring, corrective action, inspections and maintenance, and closure, and thus does not materially affect Duke Energy’s coal ash basin closure plans or compliance obligations under the CCR rule. On October 22, 2018, a coalition of environmental groups filed a petition for review in the D.C. Circuit Court challenging EPA's final Phase 1, Part 1 revisions to the CCR rule. Briefing in the case concluded in February 2019.
In addition to the requirements of the federal CCR regulation, CCR landfills and surface impoundments will continue to be independently regulated by most states. Cost recovery for future expenditures will be pursued through the normal ratemaking process with federal and state utility commissions and via wholesale contracts, which permit recovery of necessary and prudently incurred costs associated with Duke Energy’s regulated operations. For more information, see Notes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and "Asset Retirement Obligations," respectively.
Coal Ash Management Act of 2014
AROs recorded on the Duke Energy Carolinas and Duke Energy Progress Consolidated Balance Sheets at December 31, 2018, and December 31, 2017, include the legal obligation for closure of coal ash basins and the disposal of related ash as a result of the Coal Ash Act, the EPA CCR rule and other agreements. The Coal Ash Act includes a variance procedure for compliance deadlines and other issues surrounding the management of CCR and CCR surface impoundments and prohibits cost recovery in customer rates for unlawful discharge of ash impoundment waters occurring after January 1, 2014. The Coal Ash Act leaves the decision on cost recovery determinations related to closure of ash impoundments to the normal ratemaking processes before utility regulatory commissions.
Consistent with the requirements of the Coal Ash Act, Duke Energy has submitted comprehensive site assessments and groundwater corrective plans to NCDEQ and will submit to NCDEQ site-specific coal ash impoundment closure plans in advance of closure. In support of these closure plans, on November 15, 2018, Duke Energy submitted options analyses, groundwater modeling and net environmental benefits analyses for six sites potentially eligible for closure by cap in place. Separately, on November 16, 2018, Duke Energy submitted a variance application requesting that NCDEQ grant a six-month extension to the closure deadline applicable to the CCR surface impoundments at the Sutton Plant. NCDEQ held a public meeting on January 14, 2019 at which it announced that an extension would be appropriate. A final decision on the variance application is expected by April 15, 2019.



MD&AOTHER MATTERS


The current plans for each site are listed in the table below.
NCDEQ Risk ClassificationPlants/Current Closure DateExpected Closure Method
Low
Allen – December 31, 2029(a)
Belews Creek – December 31, 2029(a)
Buck – December 31, 2029(a)(b)
Rogers – December 31, 2029(a)
Marshall – December 31, 2029(a)
Mayo – December 31, 2029(a)
Roxboro – December 31, 2029(a)
Combination of a cap system and a groundwater monitoring system, or for selected sites, conversion for beneficial use.
Medium
H.F. Lee – December 31, 2029(b)
Cape Fear – December 31, 2029(b)
Weatherspoon – August 1, 2028
Excavation, which may include conversion of the basin to a lined industrial landfill, transferring coal ash to an engineered landfill, or for selected sites, conversion for beneficial use.
High
Sutton – August 1, 2019
Riverbend – August 1, 2019
Dan River – August 1, 2019
Asheville – August 1, 2022
Excavation, which may include a combination of transferring coal ash to an engineered landfill or for selected sites, conversion for beneficial use.
(a)In November 2018, the closure deadline for these basins was extended to December 31, 2029 as a result of the completion of certain dam improvement projects and alternative drinking water source projects by October 15, 2018.
(b)The Coal Ash Act requires the installation and operation of three large-scale coal ash beneficiation projects to produce reprocessed ash for use in the concrete industry. Duke Energy has selected the Buck, H.F. Lee and Cape Fear plants for these projects. Closure at these sites is required to be completed no later than December 31, 2029.
For further information on ash basins and recovery, see Notes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and “Asset Retirement Obligations,” respectively.
Estimated Cost and Impacts of Rulemakings
Duke Energy will incur capital expenditures to comply with the environmental regulations and rules discussed above. The following table, as of December 31, 2018, provides five-year estimated costs, excluding AFUDC, of new control equipment that may need to be installed on existing power plants primarily to comply with the Coal Ash Act requirements for conversion to dry disposal of bottom ash and fly ash, CWA 316(b) and ELGs through December 31, 2023. The table excludes ash basin closure costs recorded in Asset retirement obligations on the Consolidated Balance Sheets. For more information related to AROs, see Note 9 to the Consolidated Financial Statements.
(in millions)Five-Year Estimated Costs
Duke Energy$420
Duke Energy Carolinas185
Progress Energy200
Duke Energy Progress80
Duke Energy Florida120
Duke Energy Ohio15
Duke Energy Indiana20
The Duke Energy Registrants also expect to incur increased fuel, purchased power, operation and maintenance and other expenses, in addition to costs for replacement generation for potential coal-fired power plant retirements, as a result of these regulations. Actual compliance costs incurred may be materially different from these estimates due to reasons such as the timing and requirements of EPA regulations and the resolution of legal challenges to the rules. The Duke Energy Registrants intend to seek rate recovery of necessary and prudently incurred costs associated with regulated operations to comply with these regulations.
Other Environmental Regulations
The Duke Energy Registrants are also subject to various federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters, including the following:
Clean Water Act
Steam Effluent Limitation Guidelines
Cross-State Air Pollution Rule
Carbon Pollution Standards for New, Modified and Reconstructed Power Plants
Clean Power Plan/ACE Rule
Duke Energy continues to comply with enacted environmental laws and regulations even as certain of these regulations are in various stages of clarification, revision or legal challenges. The Duke Energy Registrants cannot predict the outcome of these matters.



MD&AOTHER MATTERS


Section 126 Petitions
On November 16, 2016, the state of Maryland filed a petition with EPA under Section 126 of the Clean Air Act alleging that 19 power plants, including two plants (three units) that Duke Energy Registrants own and operate, contribute to violations of EPA’s NAAQS for ozone in the state of Maryland. On March 12, 2018, the state of New York filed a petition with EPA, also under Section 126 of the Clean Air Act alleging that over 60 power plants, including four that Duke Energy Registrants own and operate, contribute to violations of EPA’s ozone NAAQS in the state of New York. Both Maryland and New York seek EPA orders requiring the states in which the named power plants operate impose more stringent NOx emission limitations on the plants. On October 5, 2018, EPA published a final rule denying the Maryland petition. That same day, Maryland appealed EPA's denial of their Section 126 petition to the D.C. Circuit Court. The impact of these petitions could be more stringent requirements for the operation of NOx emission controls at these plants. The Duke Energy Registrants cannot predict the outcome of these matters.
Global Climate Change
The Duke Energy Registrants’ GHG emissions consist primarily of CO2 and result primarily from operating a fleet of coal-fired and natural gas-fired power plants. In 2018, the Duke Energy Registrants’ power plants emitted approximately 105 million tons of CO2. Future levels of CO2 emissions will be influenced by variables that include fuel prices, compliance with new or existing regulations, economic conditions that affect electricity demand and the technologies deployed to generate the electricity necessary to meet the customer demand.
The Duke Energy Registrants have taken actions that have resulted in a reduction of CO2 emissions over time. Actions have included the retirement of 47 coal-fired EGUs with a combined generating capacity of 5,425 MW. Much of that capacity has been replaced with state-of-the-art highly efficient natural gas-fired generation that produces far fewer CO2 emissions per unit of electricity generated. Duke Energy also has made investments to expand its portfolio of wind and solar projects, increase energy efficiency offerings and invest in its zero-CO2 emissions hydropower and nuclear plants. These efforts have diversified its system and significantly reduced CO2 emissions. Between 2005 and 2018, the Duke Energy Registrants have collectively lowered the CO2 emissions from their electricity generation by 31 percent, which potentially lowers the exposure to any future mandatory CO2 emission reduction requirements or carbon tax, whether as a result of federal legislation, EPA regulation, state regulation or other as yet unknown emission reduction requirement. Duke Energy will continue to explore the use of currently available and commercially demonstrated technology to reduce CO2 emissions, including energy efficiency, wind, solar, storage and nuclear. Duke Energy will adjust to evolving and innovative technologies in a way that balances the reliability and affordability that customers expect. Under any future scenario involving mandatory CO2 limitations, the Duke Energy Registrants would plan to seek recovery of their compliance costs through appropriate regulatory mechanisms.
The Duke Energy Registrants recognize certain groups associate severe weather events with increasing levels of GHGs in the atmosphere and forecast the possibility these weather events could have a material impact on future results of operations should they occur more frequently and with greater severity. However, the uncertain nature of potential changes in extreme weather events (such as increased frequency, duration and severity), the long period of time over which any potential changes might take place and the inability to predict potential changes with any degree of accuracy, make estimating any potential future financial risk to the Duke Energy Registrants’ operations impossible.
The Duke Energy Registrants annually, biannually or triennially prepare lengthy, forward-looking IRPs. These detailed, highly technical plans are based on the company’s thorough analysis of numerous factors that can impact the cost of producing and delivering electricity that influence long-term resource planning decisions. The IRP process helps to evaluate a range of options, taking into account forecasts of future electricity demand, fuel prices, transmission improvements, new generating capacity, integration of renewables, energy storage, energy efficiency and demand response initiatives. The IRP process also helps evaluate potential environmental and regulatory scenarios to better mitigate policy and economic risks. The IRPs we file with regulators look out 10 to 20 years depending on the jurisdiction.
For a number of years, the Duke Energy Registrants have included a price on CO2 emissions in their IRP planning process to account for the potential regulation of CO2 emissions. Incorporating a price on CO2 emissions in the IRPs allows for the evaluation of existing and future resource needs against potential climate change policy risk in the absence of policy certainty. One of the challenges with using a CO2 price, especially in the absence of a clear and certain policy, is determining the appropriate price to use. To address this uncertainty and ensure the company remains agile, the Duke Energy Registrants typically use a range of potential CO2 prices to reflect a range of potential policy outcomes.
The Duke Energy Registrants routinely take steps to reduce the potential impact of severe weather events on their electric distribution systems by modernizing the electric grid through smart meters, storm hardening, self-healing and targeted undergrounding and applying lessons learned from previous storms to restoration efforts. The Duke Energy Registrants’ electric generating facilities are designed to withstand extreme weather events without significant damage. The Duke Energy Registrants maintain an inventory of coal and oil on-site to mitigate the effects of any potential short-term disruption in fuel supply so they can continue to provide customers with an uninterrupted supply of electricity.
State Legislation
In July 2017, the North Carolina General Assembly passed House Bill 589, and it was subsequently enacted into law by the governor. The law includes, among other things, overall reform of the application of PURPA for new solar projects in the state, a requirement for the utility to procure approximately 2,600 MW of renewable energy through a competitive bidding process and recovery of costs related to the competitive bidding process through the fuel clause and a competitive procurement rider. The law stipulated certain deadlines for Duke Energy to file for NCUC approval of programs required under the law. Duke Energy has made some regulatory filings since the passage of the law and will continue to implement the requirements of House Bill 589.
In July 2018, Duke Energy issued an RFP for the first tranche of 680 MW. In accordance with the provisions of HB 589, total procurement will be changed based upon how much generation with no economic dispatch or curtailment occurs over the procurement period. Most of this type of generation is solar procured under PURPA. Based upon the current forecasted amount of such generation that will occur over procurement period, Duke Energy estimates the total under HB 589 competitive procurement will be approximately 1,500 to 2,000 MW.
In various states, legislation is being considered to allow third-party sales of electricity. Deregulation or restructuring in the electric industry may result in increased competition and unrecovered costs. The Duke Energy Registrants cannot predict the outcome of these initiatives.



MD&AOTHER MATTERS


Liquefied Natural Gas Facility
Piedmont Natural Gas plans to build a liquefied natural gas facility in Robeson County, North Carolina. The project is expected to be completed in the summer of 2021 at a cost of $250 million. Construction will begin in the summer of 2019.
New Accounting Standards
See Note 1 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” for a discussion of the impact of new accounting standards.
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See “Management’s Discussion and Analysis of Results of Operations and Financial Condition – Quantitative and Qualitative Disclosures About Market Risk.”



FINANCIAL STATEMENTS


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Duke Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows 
Consolidated Statements of Changes in Equity
Duke Energy Carolinas
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Progress Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Progress
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Florida
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Ohio
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Indiana
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Piedmont
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity



FINANCIAL STATEMENTS


Combined Notes to Consolidated Financial Statements
Note 1 – Summary of Significant Accounting Policies
Note 2 – Acquisitions and Dispositions
Note 3 – Business Segments
Note 4 – Regulatory Matters
Note 5 – Commitments and Contingencies
Note 6 – Debt and Credit Facilities
Note 7 – Guarantees and Indemnifications
Note 8 – Joint Ownership of Generating and Transmission Facilities
Note 9 – Asset Retirement Obligations
Note 10 – Property, Plant and Equipment
Note 11 – Goodwill and Intangible Assets
Note 12 – Investments in Unconsolidated Affiliates
Note 13 – Related Party Transactions
Note 14 – Derivatives and Hedging
Note 15 – Investments in Debt and Equity Securities
Note 16 – Fair Value Measurements
Note 17 – Variable Interest Entities
Note 18 – Revenue
Note 19 – Common Stock
Note 20 – Severance
Note 21 – Stock-Based Compensation
Note 22 – Employee Benefit Plans
Note 23 – Income Taxes
Note 24 – Other Income and Expenses, Net
Note 25 – Subsequent Events
Note 26 – Quarterly Financial Data (Unaudited)



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of Duke Energy Corporation
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Corporation and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 2019, expressed an unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS
 Years Ended December 31,
(in millions, except per share amounts)2018
 2017
 2016
Operating Revenues     
Regulated electric$22,097
 $21,177
 $21,221
Regulated natural gas1,773
 1,734
 863
Nonregulated electric and other651
 654
 659
Total operating revenues24,521
 23,565
 22,743
Operating Expenses     
Fuel used in electric generation and purchased power6,831
 6,350
 6,625
Cost of natural gas697
 632
 265
Operation, maintenance and other6,463
 5,944
 6,224
Depreciation and amortization4,074
 3,527
 3,294
Property and other taxes1,280
 1,233
 1,142
Impairment charges402
 282
 18
Total operating expenses19,747
 17,968
 17,568
(Losses) Gains on Sales of Other Assets and Other, net(89) 28
 27
Operating Income4,685
 5,625
 5,202
Other Income and Expenses     
Equity in earnings (losses) of unconsolidated affiliates83
 119
 (15)
Other income and expenses, net399
 508
 463
Total other income and expenses482
 627
 448
Interest Expense2,094
 1,986
 1,916
Income From Continuing Operations Before Income Taxes3,073
 4,266
 3,734
Income Tax Expense From Continuing Operations448
 1,196
 1,156
Income From Continuing Operations2,625
 3,070
 2,578
Income (Loss) From Discontinued Operations, net of tax19
 (6) (408)
Net Income2,644
 3,064
 2,170
Less: Net (Loss) Income Attributable to Noncontrolling Interests(22) 5
 18
Net Income Attributable to Duke Energy Corporation$2,666
 $3,059
 $2,152
      
Earnings Per Share  Basic and Diluted
     
Income from continuing operations attributable to Duke Energy Corporation common stockholders     
Basic$3.73
 $4.37
 $3.71
Diluted$3.73
 $4.37
 $3.71
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders
    
Basic$0.03
 $(0.01) $(0.60)
Diluted$0.03
 $(0.01) $(0.60)
Net income attributable to Duke Energy Corporation common stockholders
    
Basic$3.76
 $4.36
 $3.11
Diluted$3.76
 $4.36
 $3.11
Weighted average shares outstanding     
Basic708
 700
 691
Diluted708
 700
 691
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  
2018
 2017
 2016
Net Income$2,644
 $3,064
 $2,170
Other Comprehensive (Loss) Income, net of tax     
Foreign currency translation adjustments
 
 694
Pension and OPEB adjustments(6) 3
 (11)
Net unrealized (losses) gains on cash flow hedges(10) 2
 17
Reclassification into earnings from cash flow hedges6
 8
 13
Unrealized (losses) gains on available-for-sale securities(3) 13
 2
Other Comprehensive (Loss) Income, net of tax  
(13) 26
 715
Comprehensive Income  
2,631
 3,090
 2,885
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests  
(22) 5
 20
Comprehensive Income Attributable to Duke Energy Corporation  
$2,653
 $3,085
 $2,865

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$442
 $358
Receivables (net of allowance for doubtful accounts of $16 at 2018 and $14 at 2017)962
 779
Receivables of VIEs (net of allowance for doubtful accounts of $55 at 2018 and $54 at 2017)2,172
 1,995
Inventory3,084

3,250
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)2,005
 1,437
Other (includes $162 at 2018 and $214 at 2017 related to VIEs)1,049
 634
Total current assets9,714
 8,453
Property, Plant and Equipment   
Cost134,458
 127,507
Accumulated depreciation and amortization(43,126) (41,537)
Generation facilities to be retired, net362
 421
Net property, plant and equipment91,694
 86,391
Other Noncurrent Assets   
Goodwill19,303
 19,396
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)13,617
 12,442
Nuclear decommissioning trust funds6,720
 7,097
Investments in equity method unconsolidated affiliates1,409
 1,175
Other2,935
 2,960
Total other noncurrent assets43,984
 43,070
Total Assets$145,392
 $137,914
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$3,487
 $3,043
Notes payable and commercial paper3,410
 2,163
Taxes accrued577
 551
Interest accrued559
 525
Current maturities of long-term debt (includes $227 at 2018 and $225 at 2017 related to VIEs)3,406
 3,244
Asset retirement obligations919
 689
Regulatory liabilities598
 402
Other2,085
 1,865
Total current liabilities15,041
 12,482
Long-Term Debt (includes $3,998 at 2018 and $4,306 at 2017 related to VIEs)51,123
 49,035
Other Noncurrent Liabilities   
Deferred income taxes7,806
 6,621
Asset retirement obligations9,548
 9,486
Regulatory liabilities14,834
 15,330
Accrued pension and other post-retirement benefit costs988
 1,103
Investment tax credits568
 539
Other (includes $212 at 2018 and $241 at 2017 related to VIEs)1,650
 1,581
Total other noncurrent liabilities35,394
 34,660
Commitments and Contingencies   
Equity   
Common stock, $0.001 par value, 2 billion shares authorized; 727 million shares outstanding at 2018 and 700 million shares outstanding at 20171
 1
Additional paid-in capital40,795
 38,792
Retained earnings3,113
 3,013
Accumulated other comprehensive loss(92) (67)
Total Duke Energy Corporation stockholders' equity43,817
 41,739
Noncontrolling interests17
 (2)
Total equity43,834
 41,737
Total Liabilities and Equity$145,392
 $137,914

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$2,644
 $3,064
 $2,170
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)4,696
 4,046
 3,880
Equity component of AFUDC(221) (237) (200)
Losses (Gains) on sales of other assets88
 (33) 477
Impairment charges402
 282
 212
Deferred income taxes1,079
 1,433
 900
Equity in (earnings) losses of unconsolidated affiliates(83) (119) 15
Accrued pension and other post-retirement benefit costs61
 8
 21
Contributions to qualified pension plans(141) (19) (155)
Payments for asset retirement obligations(533) (571) (608)
Payment for the disposal of other assets(105) 
 
Other rate case adjustments37
 
 
Provision for rate refunds425
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions22
 18
 34
Receivables(345) (83) (372)
Inventory156
 268
 272
Other current assets(721) (400) (174)
Increase (decrease) in     
Accounts payable479
 (204) 296
Taxes accrued23
 149
 236
Other current liabilities270
 (482) 182
Other assets(1,008) (436) (186)
Other liabilities(39) (60) (137)
Net cash provided by operating activities7,186

6,624

6,863
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(9,389) (8,052) (7,901)
Contributions to equity method investments(416) (414) (307)
Acquisitions, net of cash acquired
 (13) (4,778)
Return of investment capital137
 281
 1
Purchases of debt and equity securities(3,762) (4,071) (5,153)
Proceeds from sales and maturities of debt and equity securities3,747
 4,098
 5,236
Proceeds from the sales of discontinued operations and other assets, net of cash divested41
 
 1,418
Other(418) (271) (44)
Net cash used in investing activities(10,060)
(8,442)
(11,528)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the:     
Issuance of long-term debt5,299
 6,909
 9,238
Issuance of common stock1,838
 
 731
Payments for the redemption of long-term debt(2,906) (2,316) (1,923)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days472
 319
 2,081
Payments for the redemption of short-term debt with original maturities greater than 90 days(282) (272) (2,166)
Notes payable and commercial paper981
 (409) (1,362)
Dividends paid(2,471) (2,450) (2,332)
Other29
 1
 (16)
Net cash provided by financing activities2,960

1,782

4,251
Changes in cash and cash equivalents included in assets held for sale
 
 474
Net increase (decrease) in cash, cash equivalents, and restricted cash86

(36)
60
Cash, cash equivalents, and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents, and restricted cash at end of period$591

$505

$541
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$2,086
 $1,963
 $1,794
Cash (received from) paid for income taxes(266) 4
 229
Significant non-cash transactions:     
Accrued capital expenditures1,112
 1,032
 1,000
Non-cash dividends107
 
 
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         
Duke Energy Corporation Stockholders'
Accumulated Other Comprehensive Loss
      
             Net Unrealized
   Total
    
         Foreign
 Net
 Gains (Losses)
   Duke Energy
    
 Common
   Additional
   Currency
 Losses on
 on Available-
 Pension and
 Corporation
    
 Stock
 Common
 Paid-in
 Retained
 Translation
 Cash Flow
 for-Sale-
 OPEB
 Stockholders'
 Noncontrolling
 Total
(in millions)Shares
 Stock
 Capital
 Earnings
 Adjustments
 Hedges
 Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015688
 $1
 $37,968
 $2,564
 $(692) $(50) $(3) $(61) $39,727
 $44
 $39,771
Net income
 
 
 2,152
 
 
 
 
 2,152
 18
 2,170
Other comprehensive income (loss)(a)

 
 
 
 692
 30
 2
 (11) 713
 2
 715
Common stock issuances, including dividend reinvestment and employee benefits12
 
 773
 
 
 
 
 
 773
 
 773
Common stock dividends
 
 
 (2,332) 
 
 
 
 (2,332) 
 (2,332)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (6) (6)
Other(b)

 
 
 
 
 
 
 
 
 (50) (50)
Balance at December 31, 2016700

$1

$38,741

$2,384

$

$(20)
$(1)
$(72)
$41,033

$8

$41,041
Net income
 
 
 3,059
 
 
 
 
 3,059
 5
 3,064
Other comprehensive income
 
 
 
 
 10
 13
 3
 26
 
 26
Common stock issuances, including dividend reinvestment and employee benefits
 
 51
 
 
 
 
 
 51
 
 51
Common stock dividends
 
 
 (2,450) 
 
 
 
 (2,450) 
 (2,450)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (2) (2)
Other(c)

 
 
 20
 
 
 
 
 20
 (13) 7
Balance at December 31, 2017700

$1

$38,792

$3,013

$

$(10)
$12

$(69)
$41,739

$(2)
$41,737
Net income
 
 
 2,666
 
 
 
 
 2,666
 (22) 2,644
Other comprehensive (loss) income
 
 
 
 
 (4) (3) (6) (13) 
 (13)
Common stock issuances, including dividend reinvestment and employee benefits27
 
 2,003
 
 
 
 
 
 2,003
 
 2,003
Common stock dividends
 
 
 (2,578) 
 
 
 
 (2,578) 
 (2,578)
Distributions to noncontrolling interests in subsidiaries
 
 
 
 
 
 
 
 
 (1) (1)
Other(d)

 
 
 12
 
 
 (12) 
 
 42
 42
Balance at December 31, 2018727
 $1
 $40,795
 $3,113
 $
 $(14) $(3) $(75) $43,817
 $17
 $43,834
(a)Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(b)Noncontrolling Interests amount is primarily related to the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(c)Retained Earnings relates to a cumulative-effect adjustment due to implementation of a new accounting standard related to stock-based compensation and the associated income taxes. See Note 1 to the Consolidated Financial Statements for additional information. Noncontrolling Interests relates to the purchase of remaining interest in REC Solar.
(d)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information. Amount in Noncontrolling Interests primarily relates to tax equity financing activity in the Commercial Renewables segment.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Carolinas, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Carolinas, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.




FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$7,300
 $7,302
 $7,322
Operating Expenses     
Fuel used in electric generation and purchased power1,821

1,822
 1,797
Operation, maintenance and other2,130

2,021
 2,158
Depreciation and amortization1,201

1,090
 1,075
Property and other taxes295

281
 276
Impairment charges192


 1
Total operating expenses5,639
 5,214
 5,307
(Losses) Gains on Sales of Other Assets and Other, net(1) 1
 (5)
Operating Income1,660
 2,089
 2,010
Other Income and Expenses, net153
 199
 214
Interest Expense439
 422
 424
Income Before Income Taxes1,374
 1,866
 1,800
Income Tax Expense303
 652
 634
Net Income$1,071
 $1,214
 $1,166
Other Comprehensive Income, net of tax     
Reclassification into earnings from cash flow hedges1
 2
 2
Other Comprehensive Income, net of tax1
 2
 2
Comprehensive Income$1,072
 $1,216
 $1,168
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED BALANCE SHEETS
  December 31,
(in millions) 2018
 2017
ASSETS    
Current Assets    
Cash and cash equivalents $33
 $16
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017) 219
 200
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2018 and 2017) 699
 640
Receivables from affiliated companies 182
 95
Inventory 948

971
Regulatory assets 520
 299
Other 72
 19
Total current assets 2,673
 2,240
Property, Plant and Equipment    
Cost 44,741
 42,939
Accumulated depreciation and amortization (15,496) (15,063)
Net property, plant and equipment 29,245
 27,876
Other Noncurrent Assets    
Regulatory assets 3,457
 2,853
Nuclear decommissioning trust funds 3,558
 3,772
Other 1,027
 979
Total other noncurrent assets 8,042
 7,604
Total Assets $39,960
 $37,720
LIABILITIES AND EQUITY    
Current Liabilities    
Accounts payable $988
 $842
Accounts payable to affiliated companies 230
 209
Notes payable to affiliated companies 439
 104
Taxes accrued 171
 234
Interest accrued 102
 108
Current maturities of long-term debt 6
 1,205
Asset retirement obligations 290
 337
Regulatory liabilities 199
 126
Other 571
 486
Total current liabilities 2,996
 3,651
Long-Term Debt 10,633
 8,598
Long-Term Debt Payable to Affiliated Companies 300
 300
Other Noncurrent Liabilities    
Deferred income taxes 3,689
 3,413
Asset retirement obligations 3,659
 3,273
Regulatory liabilities 5,999
 6,231
Accrued pension and other post-retirement benefit costs 99
 95
Investment tax credits 231
 232
Other 671
 566
Total other noncurrent liabilities 14,348
 13,810
Commitments and Contingencies 
 
Equity    
Member's equity 11,689
 11,368
Accumulated other comprehensive loss (6) (7)
Total equity 11,683
 11,361
Total Liabilities and Equity $39,960
 $37,720
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,071
 $1,214
 $1,166
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,487
 1,409
 1,382
Equity component of AFUDC(73) (106) (102)
Losses (Gains) on sales of other assets1
 (1) 5
Impairment charges192
 
 1
Deferred income taxes305
 410
 470
Accrued pension and other post-retirement benefit costs4
 (4) 4
Contributions to qualified pension plans(46) 
 (43)
Payments for asset retirement obligations(230) (271) (287)
Provision for rate refunds182
 
 
(Increase) decrease in
    
Net realized and unrealized mark-to-market and hedging transactions2
 9
 5
Receivables(86) (9) (76)
Receivables from affiliated companies(87) 68
 (56)
Inventory25
 78
 215
Other current assets(161) 7
 67
Increase (decrease) in
    
Accounts payable168
 23
 (69)
Accounts payable to affiliated companies21
 (38) 18
Taxes accrued(65) 86
 187
Other current liabilities89
 (161) 63
Other assets(179) (49) 20
Other liabilities(90) (31) 6
Net cash provided by operating activities2,530
 2,634
 2,976
CASH FLOWS FROM INVESTING ACTIVITIES
    
Capital expenditures(2,706) (2,524) (2,220)
Purchases of debt and equity securities(1,810) (2,124) (2,832)
Proceeds from sales and maturities of debt and equity securities1,810
 2,128
 2,832
Notes receivable from affiliated companies
 66
 97
Other(147) (109) (83)
Net cash used in investing activities(2,853) (2,563) (2,206)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,983
 569
 1,587
Payments for the redemption of long-term debt(1,205) (116) (356)
Notes payable to affiliated companies335
 104
 
Distributions to parent(750) (625) (2,000)
Other(23) (1) 
Net cash provided by (used in) financing activities340
 (69) (769)
Net increase in cash and cash equivalents17
 2
 1
Cash and cash equivalents at beginning of period16
 14
 13
Cash and cash equivalents at end of period$33
 $16
 $14
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$452
 $398
 $393
Cash paid for (received from) income taxes89
 193
 (60)
Significant non-cash transactions:     
Accrued capital expenditures302
 315
 347
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Accumulated Other  
   Comprehensive  
   Loss  
   Net Losses
  
   on Cash
  
 Member's
 Flow
 Total
(in millions)Equity
 Hedges
 Equity
Balance at December 31, 2015$11,617
 $(11) $11,606
Net income1,166
 
 1,166
Other comprehensive income
 2
 2
Distributions to parent(2,000) 
 (2,000)
Other(2) 
 (2)
Balance at December 31, 2016$10,781
 $(9) $10,772
Net income1,214
 
 1,214
Other comprehensive income
 2
 2
Distributions to parent(625) 
 (625)
Other(2) 
 (2)
Balance at December 31, 2017$11,368
 $(7) $11,361
Net income  
1,071
 
 1,071
Other comprehensive income  

 1
 1
Distributions to parent  
(750) 
 (750)
Balance at December 31, 2018$11,689
 $(6) $11,683
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Progress Energy, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Progress Energy, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$10,728
 $9,783
 $9,853
Operating Expenses     
Fuel used in electric generation and purchased power3,976
 3,417
 3,644
Operation, maintenance and other2,613
 2,301
 2,458
Depreciation and amortization1,619
 1,285
 1,213
Property and other taxes529
 503
 487
Impairment charges87
 156
 7
Total operating expenses8,824

7,662

7,809
Gains on Sales of Other Assets and Other, net24
 26
 25
Operating Income1,928

2,147

2,069
Other Income and Expenses, net165
 209
 186
Interest Expense842
 824
 689
Income From Continuing Operations Before Income Taxes1,251

1,532

1,566
Income Tax Expense From Continuing Operations218
 264
 527
Income From Continuing Operations1,033

1,268

1,039
Income From Discontinued Operations, net of tax
 
 2
Net Income1,033

1,268

1,041
Less: Net Income Attributable to Noncontrolling Interests6
 10
 10
Net Income Attributable to Parent$1,027

$1,258

$1,031
      
Net Income  
$1,033

$1,268

$1,041
Other Comprehensive Income, net of tax  
     
Pension and OPEB adjustments5
 4
 1
Net unrealized gain on cash flow hedges6
 5
 
Reclassification into earnings from cash flow hedges
 
 8
Unrealized (losses) gains on available-for-sale securities(1) 4
 1
Other Comprehensive Income, net of tax  
10

13

10
Comprehensive Income  
1,043

1,281

1,051
Less: Comprehensive Income Attributable to Noncontrolling Interests6
 10
 10
Comprehensive Income Attributable to Parent$1,037

$1,271

$1,041

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$67
 $40
Receivables (net of allowance for doubtful accounts of $5 at 2018 and $4 at 2017)220
 123
Receivables of VIEs (net of allowance for doubtful accounts of $8 at 2018 and $7 at 2017)909
 780
Receivables from affiliated companies168
 31
Notes receivable from affiliated companies
 240
Inventory1,459

1,592
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)1,137
 741
Other (includes $39 at 2018 and $44 at 2017 related to VIEs)125
 334
Total current assets4,085
 3,881
Property, Plant and Equipment   
Cost50,260
 47,323
Accumulated depreciation and amortization(16,398) (15,857)
Generation facilities to be retired, net362
 421
Net property, plant and equipment34,224
 31,887
Other Noncurrent Assets   
Goodwill3,655
 3,655
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)6,564
 6,010
Nuclear decommissioning trust funds3,162
 3,324
Other974
 931
Total other noncurrent assets14,355
 13,920
Total Assets$52,664
 $49,688
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$1,172
 $1,006
Accounts payable to affiliated companies360
 251
Notes payable to affiliated companies1,235
 805
Taxes accrued109
 101
Interest accrued246
 212
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)1,672
 771
Asset retirement obligations514
 295
Regulatory liabilities280
 213
Other821
 729
Total current liabilities6,409
 4,383
Long-Term Debt (includes $1,636 at 2018 and $1,689 at 2017 related to VIEs)17,089
 16,916
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes3,941
 3,502
Asset retirement obligations4,897
 5,119
Regulatory liabilities5,049
 5,306
Accrued pension and other post-retirement benefit costs521
 545
Other351
 302
Total other noncurrent liabilities14,759
 14,774
Commitments and Contingencies
 
Equity   
Common stock, $0.01 par value, 100 shares authorized and outstanding at 2018 and 2017
 
Additional paid-in capital9,143
 9,143
Retained earnings5,131
 4,350
Accumulated other comprehensive loss(20) (25)
Total Progress Energy, Inc. stockholder's equity14,254
 13,468
Noncontrolling interests3
 (3)
Total equity14,257
 13,465
Total Liabilities and Equity$52,664

$49,688
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,033
 $1,268
 $1,041
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)1,987
 1,516
 1,435
Equity component of AFUDC(104) (92) (76)
Gains on sales of other assets(24) (28) (34)
Impairment charges87
 156
 7
Deferred income taxes358
 703
 532
Accrued pension and other post-retirement benefit costs24
 (28) (24)
Contributions to qualified pension plans(45) 
 (43)
Payments for asset retirement obligations(230) (248) (270)
Other rate case adjustments37
 
 
Provision for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions18
 
 42
Receivables(207) (89) 7
Receivables from affiliated companies(137) 71
 211
Inventory121
 125
 35
Other current assets(12) (397) 50
Increase (decrease) in     
Accounts payable217
 (260) 252
Accounts payable to affiliated companies109
 (97) 37
Taxes accrued8
 17
 15
Other current liabilities129
 (166) (42)
Other assets(913) (300) (248)
Other liabilities(34) (98) (36)
Net cash provided by operating activities2,544

2,053

2,891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(3,854) (3,152) (3,306)
Asset Acquisitions
 
 (10)
Purchases of debt and equity securities(1,753) (1,806) (2,143)
Proceeds from sales and maturities of debt and equity securities1,769
 1,824
 2,187
Net proceeds from sales of other assets20
 
 
Proceeds from insurance
 7
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies240
 (160) (80)
Other(182) (86) 47
Net cash used in investing activities(3,760) (3,353) (3,227)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,833
 2,118
 2,375
Payments for the redemption of long-term debt(771) (813) (327)
Notes payable to affiliated companies430
 100
 444
Dividends to parent(250) (124) (2,098)
Other(1) (4) (3)
Net cash provided by financing activities1,241

1,277

391
Net increase (decrease) in cash, cash equivalents, and restricted cash25

(23)
55
Cash, cash equivalents, and restricted cash at beginning of period87
 110
 55
Cash, cash equivalents, and restricted cash at end of period$112
 $87
 $110
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$798
 $773
 $673
Cash received from income taxes(348) (146) (187)
Significant non-cash transactions:     
Accrued capital expenditures478
 391
 317
Equitization of certain notes payable to affiliates
 1,047
 
Dividend to parent related to a legal entity restructuring
 547
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
  
  
 Accumulated Other Comprehensive Loss  
  
  
     Net
 Net Unrealized
   Total Progress
    
 Additional
   Losses on
 Gains (Losses)
 Pension and
 Energy, Inc.
    
 Paid-in
 Retained
 Cash Flow
 on Available-for-
 OPEB
 Stockholder's
 Noncontrolling
 Total
(in millions)Capital
 Earnings
 Hedges
 Sale Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015$8,092
 $4,831
 $(31) $
 $(17) $12,875
 $(22) $12,853
Net income
 1,031
 
 
 
 1,031
 10
 1,041
Other comprehensive income
 
 8
 1
 1
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (2,098) 
 
 
 (2,098) 
 (2,098)
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2016$8,094

$3,764

$(23)
$1

$(16)
$11,820

$(13)
$11,807
Net income
 1,258
 
 
 
 1,258
 10
 1,268
Other comprehensive income
 
 5
 4
 4
 13
 
 13
Dividends to parent(a)

 (672) 
 
 
 (672) 
 (672)
Equitization of certain notes payable to affiliates1,047
 
 
 
 
 1,047
 
 1,047
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2017$9,143

$4,350

$(18)
$5

$(12)
$13,468

$(3)
$13,465
Net income
 1,027
 
 
 
 1,027
 6
 1,033
Other comprehensive income (loss)
 
 6
 (1) 5
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (250) 
 
 
 (250) 
 (250)
Other(b)

 4
 
 (5) 
 (1) 1
 
Balance at December 31, 2018$9,143

$5,131

$(12)
$(1)
$(7)
$14,254

$3

$14,257
(a)Includes a $547 million non-cash dividend related to a legal entity restructuring.
(b)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Progress, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Progress, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,699
 $5,129
 $5,277
Operating Expenses     
Fuel used in electric generation and purchased power1,892
 1,609
 1,830
Operation, maintenance and other1,578
 1,439
 1,565
Depreciation and amortization991
 725
 703
Property and other taxes155
 156
 156
Impairment charges33
 19
 1
Total operating expenses4,649
 3,948
 4,255
Gains on Sales of Other Assets and Other, net9
 4
 3
Operating Income1,059
 1,185
 1,025
Other Income and Expenses, net87
 115
 132
Interest Expense319
 293
 257
Income Before Income Taxes827
 1,007
 900
Income Tax Expense160
 292
 301
Net Income and Comprehensive Income$667
 $715
 $599
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$23
 $20
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $1 at 2017)75
 56
Receivables of VIEs (net of allowance for doubtful accounts of $5 at 2018 and 2017)547
 459
Receivables from affiliated companies23
 3
Inventory954

1,017
Regulatory assets703
 352
Other62
 97
Total current assets2,387
 2,004
Property, Plant and Equipment   
Cost31,459
 29,583
Accumulated depreciation and amortization(11,423) (10,903)
Generation facilities to be retired, net362
 421
Net property, plant and equipment20,398
 19,101
Other Noncurrent Assets   
Regulatory assets4,111
 3,507
Nuclear decommissioning trust funds2,503
 2,588
Other612
 599
Total other noncurrent assets7,226
 6,694
Total Assets$30,011
 $27,799
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$660
 $402
Accounts payable to affiliated companies278
 179
Notes payable to affiliated companies294
 240
Taxes accrued53
 64
Interest accrued116
 102
Current maturities of long-term debt603
 3
Asset retirement obligations509
 295
Regulatory liabilities178
 139
Other408
 376
Total current liabilities3,099
 1,800
Long-Term Debt7,451
 7,204
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes2,119
 1,883
Asset retirement obligations4,311
 4,378
Regulatory liabilities3,955
 3,999
Accrued pension and other post-retirement benefit costs237
 248
Investment tax credits142
 143
Other106
 45
Total other noncurrent liabilities10,870
 10,696
Commitments and Contingencies   
Equity   
Member's Equity8,441
 7,949
Total Liabilities and Equity$30,011
 $27,799
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018 2017 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$667
 $715
 $599
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,183
 936
 907
Equity component of AFUDC(57) (47) (50)
Gains on sales of other assets(9) (5) (6)
Impairment charges33
 19
 1
Deferred income taxes236
 384
 384
Accrued pension and other post-retirement benefit costs15
 (20) (32)
Contributions to qualified pension plans(25) 
 (24)
Payments for asset retirement obligations(195) (192) (212)
Other rate case adjustments37
 
 
Provisions for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions5
 (4) 4
Receivables(107) (58) (17)
Receivables from affiliated companies(20) 2
 11
Inventory63
 59
 12
Other current assets(201) (75) 84
Increase (decrease) in     
Accounts payable219
 (230) 181
Accounts payable to affiliated companies99
 (48) 37
Taxes accrued(11) (39) 90
Other current liabilities46
 (131) 114
Other assets(484) (53) (163)
Other liabilities12
 (18) 12
Net cash provided by operating activities1,628
 1,195
 1,932
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(2,220) (1,715) (1,733)
Purchases of debt and equity securities(1,236) (1,249) (1,658)
Proceeds from sales and maturities of debt and equity securities1,206
 1,207
 1,615
Net proceeds from the sales of other assets20
 
 
Proceeds from insurance
 4
 
Notes receivable from affiliated companies
 165
 (165)
Other(115) (55) 26
Net cash used in investing activities(2,345) (1,643) (1,915)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt845
 812
 505
Payments for the redemption of long-term debt(3) (470) (15)
Notes payable to affiliated companies54
 240
 (209)
Distributions to parent(175) (124) (300)
Other(1) (1) (2)
Net cash provided by (used in) financing activities720
 457
 (21)
Net increase (decrease) in cash and cash equivalents3
 9
 (4)
Cash and cash equivalents at beginning of period20
 11
 15
Cash and cash equivalents at end of period$23
 $20
 $11
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$303
 $291
 $248
Cash (received from) paid for income taxes(112) 59
 (287)
Significant non-cash transactions:     
Accrued capital expenditures220
 191
 147
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
 Member's
(in millions)Equity
Balance at December 31, 2015$7,059
Net income599
Distribution to parent(300)
Balance at December 31, 2016$7,358
Net income715
Distribution to parent(124)
Balance at December 31, 2017$7,949
Net income667
Distribution to parent(175)
Balance at December 31, 2018$8,441
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Florida, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Florida, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2001.




FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,021
 $4,646
 $4,568
Operating Expenses     
Fuel used in electric generation and purchased power2,085
 1,808
 1,814
Operation, maintenance and other1,025
 853
 884
Depreciation and amortization628
 560
 509
Property and other taxes374
 347
 333
Impairment charges54
 138
 6
Total operating expenses4,166
 3,706
 3,546
Gains on Sales of Other Assets and Other, net1
 1
 
Operating Income856
 941
 1,022
Other Income and Expenses, net86
 96
 63
Interest Expense287
 279
 212
Income Before Income Taxes655
 758
 873
Income Tax Expense101
 46
 322
Net Income$554
 $712
 $551
Other Comprehensive (Loss) Income, net of tax     
Unrealized (losses) gains on available-for-sale securities(1) 3
 1
Other Comprehensive (Loss) Income, net of tax(1) 3
 1
Comprehensive Income$553
 $715
 $552
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$36
 $13
Receivables (net of allowance for doubtful accounts of $3 at 2018 and 2017)143
 65
Receivables of VIEs (net of allowance for doubtful accounts of $3 at 2018 and $2 at 2017)362
 321
Receivables from affiliated companies28
 2
Notes receivable from affiliated companies
 313
Inventory504

574
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)434
 389
Other (includes $39 at 2018 and $40 at 2017 related to VIEs)46
 86
Total current assets1,553
 1,763
Property, Plant and Equipment   
Cost18,792
 17,730
Accumulated depreciation and amortization(4,968) (4,947)
Net property, plant and equipment13,824
 12,783
Other Noncurrent Assets   
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)2,454
 2,503
Nuclear decommissioning trust funds659
 736
Other311
 284
Total other noncurrent assets3,424
 3,523
Total Assets$18,801
 $18,069
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$511
 $602
Accounts payable to affiliated companies91
 74
Notes payable to affiliated companies108
 
Taxes accrued74
 34
Interest accrued75
 56
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)270
 768
Asset retirement obligations5
 
Regulatory liabilities102
 74
Other406
 334
Total current liabilities1,642
 1,942
Long-Term Debt (includes $1,336 at 2018 and $1,389 at 2017 related to VIEs)7,051
 6,327
Other Noncurrent Liabilities   
Deferred income taxes1,986
 1,761
Asset retirement obligations586
 742
Regulatory liabilities1,094
 1,307
Accrued pension and other post-retirement benefit costs254
 264
Other93
 108
Total other noncurrent liabilities4,013
 4,182
Commitments and Contingencies   
Equity   
Member's equity6,097
 5,614
Accumulated other comprehensive income(2) 4
Total equity6,095
 5,618
Total Liabilities and Equity$18,801
 $18,069
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$554
 $712
 $551
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion793
 570
 516
Equity component of AFUDC(47) (45) (26)
Gains on sales of other assets(1) (1) 
Impairment charges54
 138
 6
Deferred income taxes159
 245
 224
Accrued pension and other post-retirement benefit costs5
 (13) 2
Contributions to qualified pension plans(20) 
 (20)
Payments for asset retirement obligations(35) (56) (58)
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions7
 5
 38
Receivables(100) (38) 23
Receivables from affiliated companies(26) 
 21
Inventory58
 66
 23
Other current assets59
 (138) (86)
Increase (decrease) in     
Accounts payable(1) (32) 71
Accounts payable to affiliated companies17
 (51) 9
Taxes accrued40
 1
 (117)
Other current liabilities82
 (37) (149)
Other assets(428) (229) (84)
Other liabilities(61) (82) (53)
Net cash provided by operating activities1,109
 1,015
 891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(1,634) (1,437) (1,583)
Purchases of debt and equity securities(517) (557) (485)
Proceeds from sales and maturities of debt and equity securities563
 617
 572
Proceeds from insurance
 4
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies313
 (313) 
Other(65) (31) 21
Net cash used in investing activities(1,340) (1,697) (1,397)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt988
 1,306
 1,870
Payments for the redemption of long-term debt(769) (342) (12)
Notes payable to affiliated companies108
 (297) (516)
Distribution to parent(75) 
 (775)
Other1
 (1) 
Net cash provided by financing activities253
 666
 567
Net increase (decrease) in cash, cash equivalents, and restricted cash22
 (16) 61
Cash, cash equivalents, and restricted cash at beginning of period53
 69
 8
Cash, cash equivalents, and restricted cash at end of period$75
 $53
 $69
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$270
 $274
 $208
Cash (received from) paid for income taxes(120) (197) 216
Significant non-cash transactions:     
Accrued capital expenditures258
 199
 170
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
    Accumulated 
    Other 
    Comprehensive 
    Income (Loss) 
    Net Unrealized
  
    Gains (Losses) on
  
  Member's
 Available-for-
 Total
(in millions) Equity
 Sale Securities
 Equity
Balance at December 31, 2015 $5,121
 $
 $5,121
Net income 551
 
 551
Other comprehensive income 
 1
 1
Distribution to parent (775) 
 (775)
Other 2
 
 2
Balance at December 31, 2016 $4,899
 $1
 $4,900
Net income 712
 
 712
Other comprehensive income 
 3
 3
Other 3
 
 3
Balance at December 31, 2017 $5,614
 $4
 $5,618
Net income 554
 
 554
Other comprehensive loss 
 (1) (1)
Distribution to parent (75) 
 (75)
Other(a)
 4
 (5) (1)
Balance at December 31, 2018 $6,097
 $(2) $6,095
(a)Amounts represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Ohio, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Ohio, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  2018
 2017
 2016
Operating Revenues     
Regulated electric$1,450
 $1,373
 $1,410
Regulated natural gas506
 508
 503
Nonregulated electric and other1
 42
 31
Total operating revenues1,957
 1,923
 1,944
Operating Expenses  
     
Fuel used in electric generation and purchased power – regulated412
 369
 442
Fuel used in electric generation and purchased power – nonregulated
 58
 51
Cost of natural gas  113
 107
 103
Operation, maintenance and other480
 530
 514
Depreciation and amortization268
 261
 233
Property and other taxes290
 278
 258
Impairment charges
 1
 
Total operating expenses1,563
 1,604
 1,601
(Losses) Gains on Sales of Other Assets and Other, net(106) 1
 2
Operating Income288
 320
 345
Other Income and Expenses, net23
 23
 11
Interest Expense92
 91
 86
Income From Continuing Operations Before Income Taxes219
 252
 270
Income Tax Expense From Continuing Operations43
 59
 78
Income From Continuing Operations176
 193
 192
(Loss) Income From Discontinued Operations, net of tax
 (1) 36
Net Income and Comprehensive Income$176
 $192
 $228
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$21
 $12
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $3 at 2017)102
 68
Receivables from affiliated companies114
 133
Notes receivable from affiliated companies
 14
Inventory126

133
Regulatory assets33
 49
Other24
 39
Total current assets420
 448
Property, Plant and Equipment   
Cost9,360
 8,732
Accumulated depreciation and amortization(2,717) (2,691)
Net property, plant and equipment6,643
 6,041
Other Noncurrent Assets   
Goodwill920
 920
Regulatory assets531
 445
Other41
 21
Total other noncurrent assets1,492
 1,386
Total Assets$8,555
 $7,875
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$316
 $313
Accounts payable to affiliated companies78
 62
Notes payable to affiliated companies274
 29
Taxes accrued202
 190
Interest accrued22
 21
Current maturities of long-term debt551
 3
Asset retirement obligations6
 3
Regulatory liabilities57
 36
Other74
 71
Total current liabilities1,580
 728
Long-Term Debt1,589
 2,039
Long-Term Debt Payable to Affiliated Companies25
 25
Other Noncurrent Liabilities   
Deferred income taxes817
 781
Asset retirement obligations87
 81
Regulatory liabilities840
 891
Accrued pension and other post-retirement benefit costs79
 59
Other93
 108
Total other noncurrent liabilities1,916
 1,920
Commitments and Contingencies   
Equity   
Common stock, $8.50 par value, 120 million shares authorized; 90 million shares outstanding at 2018 and 2017762
 762
Additional paid-in capital2,776
 2,670
Accumulated deficit(93) (269)
Total equity3,445
 3,163
Total Liabilities and Equity$8,555
 $7,875
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$176
 $192
 $228
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion271
 265
 237
Equity component of AFUDC(11) (11) (6)
Losses (Gains) on sales of other assets106
 (1) (2)
Impairment charges
 1
 
Deferred income taxes25
 90
 55
Accrued pension and other post-retirement benefit costs3
 2
 6
Contributions to qualified pension plans
 (4) (5)
Payments for asset retirement obligations(3) (7) (5)
Provision for rate refunds24
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions
 
 (2)
Receivables(33) 2
 (4)
Receivables from affiliated companies19
 (4) (36)
Inventory7
 6
 (32)
Other current assets16
 (22) 79
Increase (decrease) in     
Accounts payable(19) 12
 19
Accounts payable to affiliated companies16
 (1) 10
Taxes accrued12
 11
 3
Other current liabilities14
 (19) (54)
Other assets(26) (28) (35)
Other liabilities(27) (5) (31)
Net cash provided by operating activities570
 479
 425
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(827) (686) (476)
Notes receivable from affiliated companies14
 80
 (94)
Other(89) (41) (30)
Net cash used in investing activities(902) (647) (600)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt99
 182
 341
Payments for the redemption of long-term debt(3) (2) (53)
Notes payable to affiliated companies245
 13
 (87)
Dividends to parent
 (25) (25)
Other
 (1) (2)
Net cash provided by financing activities341
 167
 174
Net increase (decrease) in cash and cash equivalents9
 (1) (1)
Cash and cash equivalents at beginning of period12
 13
 14
Cash and cash equivalents at end of period$21
 $12
 $13
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$87
 $85
 $81
Cash received from income taxes(6) (8) (46)
Significant non-cash transactions:     
Accrued capital expenditures95
 82
 83
Non-cash equity contribution from parent106
 
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Additional
    
 Common
 Paid-in
 Accumulated
 Total
(in millions)Stock
 Capital
 Deficit
 Equity
Balance at December 31, 2015$762
 $2,720
 $(698) $2,784
Net income
 
 228
 228
Contribution from parent
 
 9
 9
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2016$762
 $2,695
 $(461) $2,996
Net income
 
 192
 192
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2017$762

$2,670

$(269)
$3,163
Net income
 
 176
 176
Contribution from parent
 106
 
 106
Balance at December 31, 2018$762
 $2,776
 $(93) $3,445
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Indiana, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Indiana, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$3,059
 $3,047
 $2,958
Operating Expenses     
Fuel used in electric generation and purchased power1,000

966
 909
Operation, maintenance and other788

743
 727
Depreciation and amortization520

458
 496
Property and other taxes78

76
 58
Impairment charges30

18
 8
Total operating expenses2,416
 2,261
 2,198
Gains on Sales of Other Assets and Other, net
 
 1
Operating Income643
 786
 761
Other Income and Expenses, net45
 47
 26
Interest Expense167
 178
 181
Income Before Income Taxes521

655

606
Income Tax Expense128
 301
 225
Net Income$393

$354

$381
Other Comprehensive Loss, net of tax     
Reclassification into earnings from cash flow hedges
 
 (1)
Comprehensive Income$393

$354

$380
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$24
 $9
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)52
 57
Receivables from affiliated companies122
 125
Inventory422

450
Regulatory assets175
 165
Other35
 30
Total current assets830
 836
Property, Plant and Equipment   
Cost15,443
 14,948
Accumulated depreciation and amortization(4,914) (4,662)
Net property, plant and equipment10,529
 10,286
Other Noncurrent Assets  
Regulatory assets982
 978
Other194
 189
Total other noncurrent assets1,176
 1,167
Total Assets$12,535
 $12,289
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$200
 $196
Accounts payable to affiliated companies83
 78
Notes payable to affiliated companies167
 161
Taxes accrued43
 95
Interest accrued58
 57
Current maturities of long-term debt63
 3
Asset retirement obligations109
 54
Regulatory liabilities25
 24
Other107
 104
Total current liabilities855
 772
Long-Term Debt3,569
 3,630
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes1,009
 925
Asset retirement obligations613
 727
Regulatory liabilities1,722
 1,723
Accrued pension and other post-retirement benefit costs115
 76
Investment tax credits147
 147
Other16
 18
Total other noncurrent liabilities3,622
 3,616
Commitments and Contingencies   
Equity   
Member's Equity4,339
 4,121
Total Liabilities and Equity$12,535
 $12,289
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$393
 $354
 $381
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization, and accretion524
 462
 499
Equity component of AFUDC(32) (28) (16)
Impairment charges30
 18
 8
Deferred income taxes95
 152
 213
Accrued pension and other post-retirement benefit costs7
 2
 8
Contributions to qualified pension plans(8) 
 (9)
Payments for asset retirement obligations(69) (45) (46)
Provision for rate refunds53
 
 
(Increase) decrease in     
Receivables7
 59
 (2)
Receivables from affiliated companies3
 (11) (43)
Inventory28
 54
 66
Other current assets(25) 28
 (67)
Increase (decrease) in     
Accounts payable37
 (86) 8
Accounts payable to affiliated companies5
 4
 (9)
Taxes accrued(52) 64
 (4)
Other current liabilities14
 (10) (81)
Other assets29
 (28) (27)
Other liabilities(33) (20) (8)
Net cash provided by operating activities1,006
 969
 871
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(832) (840) (755)
Purchases of debt and equity securities(48) (20) (14)
Proceeds from sales and maturities of debt and equity securities44
 7
 11
Proceeds from the sales of other assets15
 
 
Notes receivable from affiliated companies
 86
 (3)
Other3
 (65) 32
Net cash used in investing activities(818) (832) (729)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt
 
 494
Payments for the redemption of long-term debt(3) (5) (478)
Notes payable to affiliated companies6
 161
 
Distributions to parent(175) (300) (149)
Other(1) (1) (1)
Net cash used in financing activities(173) (145) (134)
Net increase (decrease) in cash and cash equivalents15
 (8) 8
Cash and cash equivalents at beginning of period9
 17
 9
Cash and cash equivalents at end of period$24
 $9
 $17
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$162
 $179
 $171
Cash paid for (received from) income taxes75
 117
 (7)
Significant non-cash transactions:     
Accrued capital expenditures88
 125
 99
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         Accumulated  
         Other  
         Comprehensive  
         Income  
   Additional
     Net Gains on
  
 Common
 Paid-in
 Retained
 Member's
 Cash Flow
 Total
(in millions)Stock
 Capital
 Earnings
 Equity
 Hedges
 Equity
Balance at December 31, 2015$1
 $1,384
 $2,450
 $
 $1
 $3,836
Net income
 
 
 381
 
 381
Other comprehensive loss
 
 
 
 (1) (1)
Distributions to parent
 
 
 (149) 
 (149)
Transfer to Member's Equity(1) (1,384) (2,450) 3,835
 
 
Balance at December 31, 2016$

$

$

$4,067
 $

$4,067
Net income
 
 
 354
 
 354
Distributions to parent
 
 
 (300) 
 (300)
Balance at December 31, 2017$

$

$

$4,121
 $

$4,121
Net income
 
 
 393
 
 393
Distributions to parent
 
 
 (175) 
 (175)
Balance at December 31, 2018$

$

$

$4,339
 $

$4,339
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Piedmont Natural Gas Company, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Piedmont Natural Gas Company, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31 2016, and for the two months ended December 31, 2016 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31, 2016, and for the two months ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Emphasis of Matter
As discussed in Note 1 to the financial statements, effective for fiscal year 2016, the Company changed its fiscal year end from October 31 to December 31. This resulted in a two-month transition period beginning November 1, 2016 through December 31, 2016.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1951.




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31, Two Months Ended
December 31,
 Year Ended
October 31,
(in millions)2018
 2017
 2016
 2016
Operating Revenues       
Regulated natural gas$1,365
 $1,319
 $320
 $1,139
Nonregulated natural gas and other10
 9
 2
 10
Total operating revenues1,375
 1,328
 322
 1,149
Operating Expenses       
Cost of natural gas584
 524
 144
 391
Operation, maintenance and other357
 304
 50
 353
Depreciation and amortization159
 148
 23
 137
Property and other taxes49
 48
 7
 43
Impairment charges
 7
 
 
Total operating expenses1,149
 1,031

224
 924
Operating Income226
 297

98
 225
Equity in earnings (losses) of unconsolidated affiliates7
 (6) 2
 29
Gain on sale of unconsolidated affiliates
 
 
 133
Other income and expense, net14
 (11) (2) (1)
Total other income and expenses21
 (17)

 161
Interest Expense81
 79
 12
 69
Income Before Income Taxes166
 201

86
 317
Income Tax Expense37
 62
 32
 124
Net Income$129
 $139

$54
 $193
Other Comprehensive Income, net of tax       
Unrealized loss from hedging activities of equity method investments
 
 
 (3)
Reclassification into earnings from hedging activities of equity method investments
 
 
 4
Other Comprehensive Income, net of tax
 
 
 1
Comprehensive Income$129
 $139
 $54
 $194
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$
 $19
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)266
 275
Receivables from affiliated companies22
 7
Inventory70
 66
Regulatory assets54
 95
Other19
 52
Total current assets431
 514
Property, Plant and Equipment   
Cost7,486
 6,725
Accumulated depreciation and amortization(1,575) (1,479)
Net property, plant and equipment5,911
 5,246
Other Noncurrent Assets   
Goodwill49
 49
Regulatory assets303
 283
Investments in equity method unconsolidated affiliates64
 61
Other52
 65
Total other noncurrent assets468
 458
Total Assets$6,810
 $6,218
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$203
 $125
Accounts payable to affiliated companies38
 13
Notes payable to affiliated companies198
 364
Taxes accrued84
 19
Interest accrued31
 31
Current maturities of long-term debt350
 250
Regulatory liabilities37
 3
Other58
 69
Total current liabilities999
 874
Long-Term Debt1,788
 1,787
Other Noncurrent Liabilities   
Deferred income taxes551
 564
Asset retirement obligations19
 15
Regulatory liabilities1,181
 1,141
Accrued pension and other post-retirement benefit costs4
 5
Other177
 170
Total other noncurrent liabilities1,932
 1,895
Commitments and Contingencies   
Equity   
Common stock, no par value: 100 shares authorized and outstanding at 2018 and 20171,160
 860
Retained earnings931
 802
Total equity2,091
 1,662
Total Liabilities and Equity$6,810
 $6,218

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31, Two Months Ended December 31, Year Ended October 31,
(in millions)2018
 2017
 2016
 2016
CASH FLOWS FROM OPERATING ACTIVITIES       
Net income$129
 $139
 $54
 $193
Adjustments to reconcile net income to net cash provided by operating activities:       
Depreciation and amortization161
 151
 25
 148
Gains on sales of other assets
 
 
 (133)
Impairment charges
 7
 
 
Deferred income taxes(31) 154
 26
 74
Equity in (earnings) losses from unconsolidated affiliates(7) 6
 (2) (29)
Accrued pension and other post-retirement benefit costs(4) 23
 5
 3
Contributions to qualified pension plans
 (11) (10) (14)
Payments for asset retirement obligations
 
 (1) (6)
Provision for rate refunds43
 
 
 
(Increase) decrease in       
Receivables7
 (40) (157) 12
Receivables from affiliated companies(15) 
 
 (7)
Inventory(4) 
 (11) 14
Other current assets71
 (20) 8
 (98)
Increase (decrease) in       
Accounts payable15
 (13) 35
 6
Accounts payable to affiliated companies25
 5
 4
 6
Taxes accrued65
 (48) (2) 38
Other current liabilities21
 (9) 2
 28
Other assets6
 7
 (7) (91)
Other liabilities(4) (2) 5
 180
Net cash provided by (used in) operating activities478
 349
 (26) 324
CASH FLOWS FROM INVESTING ACTIVITIES       
Capital expenditures(721) (585) (113) (522)
Contributions to equity method investments
 (12) (12) (47)
Proceeds from the sales of other assets
 
 
 175
Other(10) (6) 1
 5
Net cash used in investing activities(731) (603) (124) (389)
CASH FLOWS FROM FINANCING ACTIVITIES       
Proceeds from the:       
Issuance of long-term debt100
 250
 
 295
Issuance of common stock
 
 
 122
Payments for the redemption of long-term debt
 (35) 
 (40)
Notes payable and commercial paper
 (330) 185
 (195)
Notes payable to affiliated companies(166) 364
 
 
Capital contribution from parent300
 
 
 
Dividends to parent
 
 (27) 
Dividends paid
 
 
 (114)
Other
 (1) 
 
Net cash provided by financing activities234
 248
 158
 68
Net (decrease) increase in cash and cash equivalents(19) (6) 8
 3
Cash and cash equivalents at beginning of period19
 25
 17
 14
Cash and cash equivalents at end of period$
 $19
 $25
 $17
Supplemental Disclosures:       
Cash paid for interest, net of amount capitalized$79
 $78
 $11
 $81
Cash received from income taxes(16) (12) 
 (25)
Significant non-cash transactions:       
Accrued capital expenditures96
 34
 48
 63
Transfer of ownership interest of certain equity method investees to parent
 149
 
 

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
     Accumulated  
     Other  
       Comprehensive   
     Income (Loss)  
     Net Gain on
  
     Hedging Activities
  
 Common
 Retained
 of Unconsolidated
 Total
(in millions)Stock
 Earnings
 Affiliates
 Equity
Balance at October 31, 2015$721
 $706
 $(1) $1,426
Net income  
 193
 
 193
Other comprehensive income
 
 1
 1
Common stock issuances, including dividend reinvestment and employee benefits139
 
 
 139
Common stock dividends
 (114) 
 (114)
Balance at October 31, 2016$860
 $785
 $
 $1,645
Net income
 54
 
 54
Dividends to parent
 (27) 
 (27)
Balance at December 31, 2016$860
 $812
 $
 $1,672
Net income
 139
 
 139
Transfer of ownership interest of certain equity method investees to parent
 (149) 
 (149)
Balance at December 31, 2017$860
 $802
 $
 $1,662
Net income  

 129
 
 129
Contribution from parent300
 
 
 300
Balance at December 31, 2018$1,160
 $931
 $
 $2,091
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Index to Combined Notes To Consolidated Financial Statements
The notes to the consolidated financial statements are a combined presentation. The following table indicates the registrants to which the notes apply.
 Applicable Notes
Registrant1234567891011121314151617181920212223242526
Duke Energy 
Duke Energy Carolinas   
Progress Energy    
Duke Energy Progress     
Duke Energy Florida     
Duke Energy Ohio     
Duke Energy Indiana    
Piedmont     
Tables within the notes may not sum across due to (i) Progress Energy's consolidation of Duke Energy Progress, Duke Energy Florida and other subsidiaries that are not registrants and (ii) subsidiaries that are not registrants but included in the consolidated Duke Energy balances.
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Nature of Operations and Basis of Consolidation
Duke Energy is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the FERC and other regulatory agencies listed below. Duke Energy operates in the U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas; Progress Energy; Duke Energy Progress; Duke Energy Florida; Duke Energy Ohio; Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
In October 2016, Duke Energy completed the acquisition of Piedmont. Duke Energy's consolidated financial statements include Piedmont's results of operations and cash flows activity subsequent to the acquisition date. Effective November 1, 2016, Piedmont's fiscal year-end was changed from October 31 to December 31, the year-end of Duke Energy. A transition report was filed on Form 10-Q (Form 10-QT) for the transition period from November 1, 2016, to December 31, 2016. See Note 2 for additional information regarding the acquisition.
In December 2016, Duke Energy completed an exit of the Latin American market to focus on its domestic regulated business, which was further bolstered by the acquisition of Piedmont. The sale of the International Energy business segment, excluding an equity method investment in NMC, was completed through two transactions including a sale of assets in Brazil to CTG and a sale of Duke Energy's remaining Latin American assets in Peru, Chile, Ecuador, Guatemala, El Salvador and Argentina to I Squared (collectively, the International Disposal Group). See Note 2 for additional information on the sale of International Energy.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself.
These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 17 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 8 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting.
Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Progress Energy is a public utility holding company, which conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below.
Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is recovered from retail customers and recorded in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, fileunless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the PUCO, KPSC and FERC.
Duke Energy Indiana is a consolidated federal income tax returnregulated public utility primarily engaged in the generation, transmission, distribution and other state returns. The Subsidiary Registrants entered intosale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC.
Piedmont is a tax-sharing agreement with Duke Energy. Income taxes recorded representregulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC and FERC.
Certain prior year amounts the Subsidiary Registrants would incur as separate C-Corporations. Deferred income taxes have been providedreclassified to conform to the current year presentation.
Other Current Assets and Liabilities
The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5 percent of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2018, or 2017.
   December 31,
(in millions)Location 2018
 2017
Duke Energy     
Income taxes receivableCurrent Assets $729
 $330
Accrued compensationCurrent Liabilities 793
 757
Duke Energy Carolinas     
Accrued compensationCurrent Liabilities $251
 $252
Progress Energy   
  
Income taxes receivableCurrent Assets $66
 $278
Customer depositsCurrent Liabilities 345
 338
Duke Energy Progress   
  
Customer depositsCurrent Liabilities $137
 $129
Accrued compensationCurrent Liabilities 130
 132
Duke Energy Florida   
  
Customer depositsCurrent Liabilities $208
 $208
Other accrued liabilitiesCurrent Liabilities 85
 16
Duke Energy Ohio   
  
Income taxes receivableCurrent Assets $13
 $36
Customer depositsCurrent Liabilities 44
 46
Duke Energy Indiana   
  
Customer depositsCurrent Liabilities $47
 $45
Piedmont     
Income taxes receivableCurrent Assets $11
 $43
Discontinued Operations
The results of operations of the International Disposal Group have been classified as Discontinued Operations on Duke Energy's Consolidated Statements of Operations. Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for temporary differences betweenall periods presented. See Note 2 for additional information.
Amounts Attributable to Controlling Interests
For the years ended December 31, 2018, and 2017, the Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations is entirely attributable to controlling interest. For the year ended December 31, 2016, $18 million of net income is attributable to noncontrolling interests, which consisted of $7 million included in Income from Continuing Operations and $11 million included in Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statement of Operations.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Significant Accounting Policies
Use of Estimates
In preparing financial statements that conform to GAAP, the Duke Energy Registrants must make estimates and tax basesassumptions that affect the reported amounts of assets and liabilities, because the differences create taxablereported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Regulatory Accounting
The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or tax-deductibleFERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. See Note 4 for further information.
Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery.
When it becomes probable that regulated generation, transmission or distribution assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment charge for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash flows.
The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Cash, Cash Equivalents and Restricted Cash
All highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents. Duke Energy, Progress Energy and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Note 17 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets.
 December 31, 2018 December 31, 2017
   Duke
   Duke
 Duke
Progress
Energy
 Duke
Progress
Energy
 Energy
Energy
Florida
 Energy
Energy
Florida
Current Assets       
Cash and cash equivalents$442
$67
$36
 $358
$40
$13
Other141
39
39
 138
40
40
Other Noncurrent Assets       
Other8
6

 9
7

Total cash, cash equivalents and restricted cash$591
$112
$75
 $505
$87
$53
Inventory
Inventory is used for operations and is recorded primarily using the average cost method. Inventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Materials and supplies are recorded as inventory when purchased and subsequently charged to expense or capitalized to property, plant and equipment when installed. Inventory, including excess or obsolete inventory, is written-down to the lower of cost or market value. Once inventory has been written-down, it creates a new cost basis for the inventory that is not subsequently written-up. Provisions for inventory write-offs were not material at December 31, 2018, and 2017. The components of inventory are presented in the tables below.
 December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,238
 $731
 $1,049
 $734
 $315
 $84
 $312
 $2
Coal491
 175
 192
 106
 86
 14
 109
 
Natural gas, oil and other355
 42
 218
 114
 103
 28
 1
 68
Total inventory$3,084
 $948
 $1,459
 $954
 $504
 $126
 $422
 $70
 December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,293
 $744
 $1,118
 $774
 $343
 $82
 $309
 $2
Coal603
 192
 255
 139
 116
 17
 139
 
Natural gas, oil and other354
 35
 219
 104
 115
 34
 2
 64
Total inventory$3,250
 $971
 $1,592
 $1,017
 $574
 $133
 $450
 $66
Investments in Debt and Equity Securities
The Duke Energy Registrants classify investments in equity securities as FV-NI and investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in AOCI until realized, except OTTIs that are included in earnings immediately. At the time gains and losses for debt securities are realized, they are reported through net income. For certain investments of regulated operations, such as substantially all of the NDTF, realized and unrealized gains and losses (including any OTTIs) on debt securities are recorded as a regulatory asset or liability. The credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity. See Note 15 for further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Goodwill and Intangible Assets
Goodwill
Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be a business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 11 for further information.
Intangible Assets
Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an amortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced.
Emission allowances permit the holder of the allowance to emit certain gaseous byproducts of fossil fuel combustion, including SO2 and NOX. Allowances are issued by the EPA at zero cost and may also be bought and sold via third-party transactions. Allowances allocated to or acquired by the Duke Energy Registrants are held primarily for consumption. Carrying amounts for emission allowances are based on the cost to acquire the allowances or, in the case of a business combination, on the fair value assigned in the allocation of the purchase price of the acquired business. Emission allowances are expensed to Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.
RECs are used to measure compliance with renewable energy standards and are held primarily for consumption. See Note 11 for further information.
Long-Lived Asset Impairments
The Duke Energy Registrants evaluate long-lived assets, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the long-lived asset is not recoverable based on these estimated future periods. ITCs associated with regulated operationsundiscounted cash flows, the carrying value of the asset is written-down to its then-current estimated fair value and an impairment charge is recognized.
The Duke Energy Registrants assess fair value of long-lived assets using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are deferrednot limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset.
Equity Method Investment Impairments
Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method. Equity method investments are assessed for impairment whenever events or changes in circumstances indicate that the carrying amount of the investment may not be recoverable. If the decline in value is considered to be other than temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment.
Impairment assessments use a discounted cash flow income approach and amortizedinclude consideration of the severity and duration of any decline in the fair value of the investments. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. Key inputs that involve estimates and significant management judgment include cash flow projections, selection of a discount rate, probability weighting of potential outcomes, and whether any decline in value is considered temporary.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Property, Plant and Equipment
Property, plant and equipment are stated at the lower of depreciated historical cost net of any disallowances or fair value, if impaired. The Duke Energy Registrants capitalize all construction-related direct labor and material costs, as a reductionwell as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction and Interest Capitalized” for information on capitalized financing costs. Costs of income tax expenserenewals and betterments that extend the useful life of property, plant and equipment are also capitalized. The cost of repairs, replacements and major maintenance projects, which do not extend the useful life or increase the expected output of the asset, are expensed as incurred. Depreciation is generally computed over the estimated useful liveslife of the related properties.
Accumulated deferred income taxes are valuedasset using the enacted tax rate expectedcomposite straight-line method. Depreciation studies are conducted periodically to apply to taxable incomeupdate composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the periodstable that follows.
 Years Ended December 31,
 2018
 2017
 2016
Duke Energy3.0% 2.8% 2.8%
Duke Energy Carolinas2.8% 2.8% 2.8%
Progress Energy2.9% 2.6% 2.7%
Duke Energy Progress2.9% 2.6% 2.6%
Duke Energy Florida3.0% 2.8% 2.8%
Duke Energy Ohio2.8% 2.8% 2.6%
Duke Energy Indiana3.3% 3.0% 3.1%
Piedmont(a)
2.5% 2.3%  
(a)Piedmont's weighted average depreciation rate was 2.4 percent for the annualized two months ended December 31, 2016, and for the year ended October 31, 2016.
In general, when the Duke Energy Registrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in whichadvance of its original expected useful life or is abandoned, the deferred taxcost of the asset or liabilityand the corresponding accumulated depreciation is expectedrecognized as a separate asset. If the asset is still in operation, the net amount is classified as Generation facilities to be settled or realized. Inretired, net on the eventConsolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of a change in tax rates, deferred tax assets and liabilities are remeasured aslong-lived asset impairments above). When it becomes probable an asset will be abandoned, the cost of the enactment date ofasset and accumulated depreciation is reclassified to Regulatory assets on the new rate. To the extent that the changeConsolidated Balance Sheets for amounts recoverable in therates. The carrying value of the deferred tax representsasset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, an obligationimpairment is recognized to customers, the impactextent the net book value of the remeasurementasset exceeds the present value of future revenues discounted at the incremental borrowing rate.
When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body. See Note 10 for additional information.
Nuclear Fuel
Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets.
Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method.
Allowance for Funds Used During Construction and Interest Capitalized
For regulated operations, the debt and equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets.
AFUDC equity, a permanent difference for income taxes, reduces the ETR when capitalized and increases the ETR when depreciated or amortized. See Note 23 for additional information.
For nonregulated operations, interest is capitalized during the construction phase with an offsetting non-cash credit to Interest Expense on the Consolidated Statements of Operations.
Asset Retirement Obligations
AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be probable of recovery.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or liability.
Obligations for nuclear decommissioning are based on site-specific cost studies. Duke Energy Carolinas and Duke Energy Progress assume prompt dismantlement of the nuclear facilities after operations are ceased. Duke Energy Florida assumes Crystal River Unit 3 will be placed into a safe storage configuration until eventual dismantlement is completed by 2074. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida also assume that spent fuel will be stored on-site until such time that it can be transferred to a regulatory liability. Remaining impactsyet to be built DOE facility.
Obligations for closure of ash basins are recorded in income from continuing operations. Other impactsbased upon discounted cash flows of estimated costs for site-specific plans, if known, or probability weightings of the Tax Act have been recordedpotential closure methods if the closure plans are under development and multiple closure options are being considered and evaluated on a provisional basis, seesite-by-site basis. See Note 22, “Income Taxes,”9 for additional information. If Duke Energy's estimate of the tax effect of reversing temporary differences is not reflective of actual outcomes, is modified to reflect new developments or interpretations of the tax law, revised to incorporate new accounting principles, or changes in the expected timing or manner of the reversal then Duke Energy's results of operations could be impacted.

LIQUIDITY AND CAPITAL RESOURCES
Sources and Uses of Cash
Duke Energy relies primarily upon cash flows from operations, debt and equity issuances and its existing cash and cash equivalents to fund its liquidity and capital requirements. Duke Energy’s capital requirements arise primarily from capital and investment expenditures, repaying long-term debt and paying dividends to shareholders. Duke Energy’s projected primary sources and uses for the next three fiscal years are included in the table below.
(in millions)2018
 2019
 2020
Uses:  
 
  
  
Capital expenditures$10,950
 $10,975
 $9,050
Debt maturities and reduction in short-term debt(a)
3,135
 3,500
 2,850
Dividend payments(b)
2,575
 2,750
 2,875
Sources:  
     
Net cash flows from operations$7,945
 $9,150
 $9,390
Debt issuances and increase in short-term debt(c)
6,000
 7,100
 3,050
Equity issuances(d)
2,000
 350
 350
(a)Excludes capital leases. Duke Energy projects a reduction in short-term debt in 2020.
(b)Subject to approval by the Board of Directors.
(c)Duke Energy projects an increase in short-term debt in 2018 and 2019.
(d)2018 equity issuances to be achieved through a public offering and through issuances under the Equity Distribution Agreement and the Dividend Reinvestment Program (DRIP). See Note 18 to the Consolidated Financial Statements, "Common Stock" for additional information.

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Among other provisions, the Tax Act lowers the corporate federal income tax rate from 35 percent to 21 percent and eliminates bonus depreciation for regulated utilities. For Duke Energy’s regulated operations, the reduction in federal income taxes is expected to result in lower regulated customer rates. However, due to its existing NOL (Net operating loss) position and other tax credits, Duke Energy does not expect to be a significant federal cash tax payer through at least 2022. As a result, any reduction in customer rates could cause a material reduction in consolidated cash flows from operations in the short-term.short term. Over time, the reduction in deferred tax liabilities resulting from the Tax Act will increase Duke Energy’s regulated rate base investments and customer rates. See the Credit Ratings section below for additional information on the impact of the Tax Act on the Duke Energy Registrants' credit ratings. Impacts of Tax Act to Duke Energy’s cash flows and credit metrics are subject to the regulatory actions of its state commissions and the FERC, which are currently pending.FERC. See Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information.
In order to strengthen its balance sheet and credit metrics and bolster cash flows, Duke Energy plans to issue $2 billion of common stock equity during 2018, including its previous plan to issue $350 million annually through its DRIP beginning in 2018, as well as reduce its capital expenditures during 2018-2022 by approximately $1 billion.
The Subsidiary Registrants generally maintain minimal cash balances and use short-term borrowings to meet their working capital needs and other cash requirements. The Subsidiary Registrants, excluding Progress Energy (Parent), support their short-term borrowing needs through participation with Duke Energy and certain of its other subsidiaries in a money pool arrangement. The companies with short-term funds may provide short-term loans to affiliates participating under this arrangement. See Note 6 to the Consolidated Financial Statements, “Debt and Credit Facilities,” for additional discussion of the money pool arrangement.



MD&ALIQUIDITY AND CAPITAL RESOURCES


Duke Energy and the Subsidiary Registrants, excluding Progress Energy (Parent), may also use short-term debt, including commercial paper and the money pool, as a bridge to long-term debt financings. The levels of borrowing may vary significantly over the course of the year due to the timing of long-term debt financings and the impact of fluctuations in cash flows from operations. From time to time, Duke Energy’s current liabilities exceed current assets resulting from the use of short-term debt as a funding source to meet scheduled maturities of long-term debt, as well as cash needs, which can fluctuate due to the seasonality of its businesses.
Equity Issuance
In order to strengthen its balance sheet and credit metrics and bolster cash flows, Duke Energy plans to issue $500 million of common stock equity per year through 2023 through the DRIP and ATM programs. See Note 19 to the Consolidated Financial Statements, "Common Stock," for further information regarding Duke Energy's equity issuances in 2018.
Credit Facilities and Registration Statements
See Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding credit facilities and shelf registration statements available to Duke Energy and the Duke Energy Registrants.
CAPITAL EXPENDITURES
Duke Energy continues to focus on reducing risk and positioning its business for future success and will invest principally in its strongest business sectors. Duke Energy’s projected capital and investment expenditures, including debt AFUDC and capitalized interest, for the next three fiscal years are included in the table below.
(in millions)2018
2019
2020
2019
2020
2021
New generation$780
$260
$135
$375
$125
$220
Regulated renewables155
415
365
415
410
710
Environmental610
35
30
240
125
35
Nuclear fuel500
410
455
430
505
390
Major nuclear390
335
230
305
315
250
Customer additions490
485
515
505
480
475
Grid modernization and other transmission and distribution projects2,585
3,515
3,415
2,835
3,160
2,980
Maintenance and other2,665
2,445
2,230
3,395
2,605
2,390
Total Electric Utilities and Infrastructure8,175
7,900
7,375
8,500
7,725
7,450
Gas Utilities and Infrastructure2,350
2,275
950
1,675
2,000
1,600
Commercial Renewables and Other425
800
725
925
825
625
Total projected capital and investment expenditures$10,950
$10,975
$9,050
$11,100
$10,550
$9,675
DEBT MATURITIES
See Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding significant components of Current Maturities of Long-Term Debt on the Consolidated Balance Sheets.
DIVIDEND PAYMENTS
In 2017,2018, Duke Energy paid quarterly cash dividends for the 91st92nd consecutive year and expects to continue its policy of paying regular cash dividends in the future. There is no assurance as to the amount of future dividends because they depend on future earnings, capital requirements, financial condition and are subject to the discretion of the Board of Directors.
Duke Energy targets a dividend payout ratio of between 70 percent65 and 75 percent, based upon adjusted diluted EPS.EPS, and expects this trend to continue through 2023. In 20162017 and 2017,2018, Duke Energy increased the dividend by approximately 4 percent annually. Through 2022,annually, and the annual dividendcompany remains committed to continued growth rate is expected to be between approximately 4 to 6 percent.

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of the dividend.
Dividend and Other Funding Restrictions of Duke Energy Subsidiaries
As discussed in Note 4 to the Consolidated Financial Statements, “Regulatory Matters,” Duke Energy’s wholly owned public utility operating companies have restrictions on the amount of funds that can be transferred to Duke Energy through dividends, advances or loans as a result of conditions imposed by various regulators in conjunction with merger transactions. Duke Energy Progress and Duke Energy Florida also have restrictions imposed by their first mortgage bond indentures and Articles of Incorporation, which in certain circumstances, limit their ability to make cash dividends or distributions on common stock. Additionally, certain other Duke Energy subsidiaries have other restrictions, such as minimum working capital and tangible net worth requirements pursuant to debt and other agreements that limit the amount of funds that can be transferred to Duke Energy. At December 31, 2017,2018, the amount of restricted net assets of wholly owned subsidiaries of Duke Energy that may not be distributed to Duke Energy in the form of a loan or dividend is less than 25 percentdoes not exceed a material amount of Duke Energy’s net assets. Duke Energy does not have any legal or other restrictions on paying common stock dividends to shareholders out of its consolidated equity accounts. Although these restrictions cap the amount of funding the various operating subsidiaries can provide to Duke Energy, management does not believe these restrictions will have a significant impact on Duke Energy’s ability to access cash to meet its payment of dividends on common stock and other future funding obligations.



MD&ALIQUIDITY AND CAPITAL RESOURCES


CASH FLOWS FROM OPERATING ACTIVITIES
Cash flows from operations of Electric Utilities and Infrastructure and Gas Utilities and Infrastructure are primarily driven by sales of electricity and natural gas, respectively, and costs of operations. These cash flows from operations are relatively stable and comprise a substantial portion of Duke Energy’s operating cash flows. Weather conditions, working capital and commodity price fluctuations and unanticipated expenses including unplanned plant outages, storms, legal costs and related settlements can affect the timing and level of cash flows from operations.
Duke Energy believes it has sufficient liquidity resources through the commercial paper markets, and ultimately, the Master Credit Facility, to support these operations. Cash flows from operations are subject to a number of other factors, including, but not limited to, regulatory constraints, economic trends and market volatility (see Item 1A, “Risk Factors,” for additional information).
At December 31, 2017,2018, Duke Energy had cash and cash equivalents and short-term investments of $358$442 million.
DEBT ISSUANCES
Depending on availability based on the issuing entity, the credit rating of the issuing entity, and market conditions, the Subsidiary Registrants prefer to issue first mortgage bonds and secured debt, followed by unsecured debt. This preference is the result of generally higher credit ratings for first mortgage bonds and secured debt, which typically result in lower interest costs. Duke Energy Corporation primarily issues unsecured debt.
In 2019, Duke Energy anticipates issuing additional debt of $7.5 billion, primarily for the purpose of funding capital expenditures and debt maturities. See to Note 6 to the Consolidated Financial Statements, "Debt and Credit Facilities," for further information regarding significant debt issuances.issuances in 2018.
Duke Energy’s capitalization is balanced between debt and equity as shown in the table below.
 Projected 2018
 Actual 2017
 Actual 2016
Equity44% 43% 45%
Debt56% 57% 55%
Duke Energy’s fixed charges coverage ratio, calculated using Securities and Exchange Commission (SEC) guidelines, was 2.9 times for 2017, 2.7 times for 2016 and 3.1 times for 2015.
 Projected 2019
 Actual 2018
 Actual 2017
Equity44% 43% 43%
Debt56% 57% 57%
Restrictive Debt Covenants
Duke Energy’s debt and credit agreements contain various financial and other covenants. Duke Energy's Master Credit Facility contains a covenant requiring the debt-to-total capitalization ratio to not exceed 65 percent for each borrower, excluding Piedmont, and 70 percent for Piedmont. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements or sublimits thereto. As of December 31, 2017,2018, each of the Duke Energy Registrants was in compliance with all covenants related to their debt agreements. In addition, some credit agreements may allow for acceleration of payments or termination of the agreements due to nonpayment, or acceleration of other significant indebtedness of the borrower or some of its subsidiaries. None of the debt or credit agreements contain material adverse change clauses.



MD&ALIQUIDITY AND CAPITAL RESOURCES


Credit Ratings
Moody’s, Investors Service, Inc. (Moody’s), Standard & Poor’s Rating Services (S&P)S&P and Fitch Ratings, Inc. provide credit ratings for various

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Duke Energy Registrants. The following table includes Duke Energy and certain subsidiaries’ credit ratings and ratings outlook as of February 2018.2019.
 Moody's S&P Fitch
Duke Energy CorporationNegativeStable
(a)
Stable NegativeStable
Issuer Credit RatingBaa1 A- BBB+
Senior Unsecured DebtBaa1 BBB+ BBB+
Commercial PaperP-2 A-2 F-2
Duke Energy CarolinasStable Stable N/A
Senior Secured DebtAa2 A N/A
Senior Unsecured DebtA1 A- N/A
Progress EnergyStable Stable N/A
Senior Unsecured DebtBaa2Baa1 BBB+ N/A
Duke Energy ProgressStable Stable N/A
Senior Secured DebtAa3 A N/A
Duke Energy FloridaStable Stable N/A
Senior Secured DebtA1 A N/A
Senior Unsecured DebtA3 A- N/A
Duke Energy OhioPositiveStable Stable N/A
Senior Secured DebtA2 A N/A
Senior Unsecured DebtBaa1 A- N/A
Duke Energy IndianaStable Stable N/A
Senior Secured DebtAa3 A N/A
Senior Unsecured DebtA2 A- N/A
Duke Energy KentuckyStable Stable N/A
Senior Unsecured DebtBaa1 A- N/A
Piedmont Natural GasNegativeStable
(a)
Stable N/A
Senior UnsecuredA2A3 A- N/A
(a)In January 2018, Moody's revised the ratings outlook for Duke Energy Corporation and Piedmont from stable to negative, principally due to risk of deterioration in credit metrics resulting from the Tax Act. See the Tax Cuts and Jobs Act section above for additional information on the Tax Act.
Credit ratings are intended to provide credit lenders a framework for comparing the credit quality of securities and are not a recommendation to buy, sell or hold. The Duke Energy Registrants’ credit ratings are dependent on the rating agencies’ assessments of their ability to meet their debt principal and interest obligations when they come due. If, as a result of market conditions or other factors, the Duke Energy Registrants are unable to maintain current balance sheet strength, or if earnings and cash flow outlook materially deteriorates, credit ratings could be negatively impacted.
Cash Flow Information
The following table summarizes Duke Energy’s cash flows for the three most recently completed fiscal years.
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Cash flows provided by (used in):          
Operating activities$6,634
 $6,817
 $6,700
$7,186
 $6,624
 $6,863
Investing activities(8,450) (11,533) (5,277)(10,060) (8,442) (11,528)
Financing activities1,782
 4,251
 (2,602)2,960
 1,782
 4,251
Changes in cash and cash equivalents included in assets held for sale
 474
 1,099

 
 474
Net (decrease) increase in cash and cash equivalents(34) 9
 (80)
Cash and cash equivalents at beginning of period392
 383
 463
Cash and cash equivalents at end of period$358
 $392
 $383
Net increase (decrease) in cash, cash equivalents and restricted cash86
 (36) 60
Cash, cash equivalents and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents and restricted cash at end of period$591
 $505
 $541



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MD&ALIQUIDITY AND CAPITAL RESOURCES

PART II

OPERATING CASH FLOWS
The following table summarizes key components of Duke Energy’s operating cash flows for the three most recently completed fiscal years.
Years Ended December 31,
    Variance
   Variance
Years Ended December 31,    2018 vs.
   2017 vs.
(in millions)2017

2016

2015
2018

2017
 2017

2016
 2016
Net income$3,064
 $2,170
 $2,831
$2,644
 $3,064
 $(420) $2,170
 $894
Non-cash adjustments to net income5,380
 5,305
 4,800
6,484
 5,380
 1,104
 5,305
 75
Contributions to qualified pension plans(19) (155) (302)(141) (19) (122) (155) 136
Payments for AROs(571) (608) (346)(533) (571) 38
 (608) 37
Payment for disposal of other assets(105) 
 (105) 
 
Working capital(1,220) 105
 (283)(1,163) (1,230) 67
 151
 (1,381)
Net cash provided by operating activities$6,634

$6,817

$6,700
$7,186

$6,624
 $562

$6,863
 $(239)
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $684 million increase in net income after adjustment for non-cash items primarily due to favorable weather and increased pricing and volumes in the current period; and
a $38 million decrease in payments to AROs.
Offset by:
a $122 million increase in contributions to qualified pension plans; and
a $105 million payment for disposal of Beckjord.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $1,325$1,381 million decrease in working capital due to weather, payment of merger transaction and integration related costs and increased property tax payments in 2017.
Offset by:
a $969 million increase in net income after non-cash adjustments primarily due to the inclusion of Piedmont's earnings for a full year, favorable pricing and weather-normal retail volumes driven by the residential class in the Electric Utilities and Infrastructure Segmentsegment combined with continued strong cost control;
a $136 million decrease in contributions to qualified pension plans; and
a $37 million decrease in payments to AROs.
For the year ended December 31, 2016, compared to 2015, the variance was driven primarily by:
a $388 million increase in cash flows from working capital primarily due to the sale of the International business; and
a $147 million decrease in contributions to qualified pension plans.
Offset by:
a $262 million increase in payments for AROs; and
a $156 million decrease in net income after non-cash adjustments due to higher storm costs offset by favorable weather, increased rider revenues, higher wholesale margins and strong cost control.
INVESTING CASH FLOWS
The following table summarizes key components of Duke Energy’s investing cash flows for the three most recently completed fiscal years.
Years Ended December 31,
    Variance
   Variance
Years Ended December 31,    2018 vs.
   2017 vs.
(in millions)2017

2016

2015
2018

2017
 2017

2016
 2016
Capital, investment and acquisition expenditures$(8,198) $(13,215) $(8,363)$(9,668) $(8,198) $(1,470) $(13,215) $5,017
Available for sale securities, net27
 83
 3
Debt and equity securities, net(15) 27
 (42) 83
 (56)
Net proceeds from the sales of discontinued operations and other assets, net of cash divested
 1,418
 2,968
41
 
 41
 1,418
 (1,418)
Other investing items(279) 181
 115
(418) (271) (147) 186
 (457)
Net cash used in investing activities$(8,450)
$(11,533)
$(5,277)$(10,060)
$(8,442) $(1,618)
$(11,528) $3,086



MD&ALIQUIDITY AND CAPITAL RESOURCES


The primary use of cash related to investing activities is capital, investment and acquisition expenditures, detailed by reportable business segment in the following table.
Years Ended December 31,Years Ended December 31,
(in millions)2017

2016

2015
2018

2017

2016
Electric Utilities and Infrastructure$7,024
 $6,649
 $6,852
$8,086
 $7,024
 $6,649
Gas Utilities and Infrastructure907
 5,519
 234
1,133
 907
 5,519
Commercial Renewables92
 857
 1,019
193
 92
 857
Other175
 190
 258
256
 175
 190
Total capital, investment and acquisition expenditures$8,198

$13,215

$8,363
$9,668

$8,198

$13,215

For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
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a $1,470 million increase in capital, investment and acquisition expenditures in all reportable business segments, including expenditures related to W.S. Lee CC, Asheville and Citrus County CC at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $5,017 million decrease in capital, investment and acquisition expenditures mainly due to the Piedmont acquisition in the prior year.
Partially offset by:
a $1,418 million decrease in net proceeds from sales of discontinued operations due to the prior year sale of the International business.
For the year ended December 31, 2016, compared to 2015, the variance was driven primarily by:
a $4,852 million increase in capital, investment and acquisition expenditures mainly due to the Piedmont acquisition; and
a $1,550 million decrease in net proceeds from sales of discontinued operations mainly due to the variance in proceeds between the 2015 sale of the Midwest generation business and the 2016 sale of the International business.
FINANCING CASH FLOWS
The following table summarizes key components of Duke Energy’s financing cash flows for the three most recently completed fiscal years.
Years Ended December 31,
    Variance
   Variance
Years Ended December 31,    2018 vs.
   2017 vs.
(in millions)2017
 2016
 2015
2018
 2017
 2017
 2016
 2016
Issuance of common stock$
 $731
 $17
$1,838
 $
 $1,838
 $731
 $(731)
Issuances (Repayments) of long-term debt, net4,593
 7,315
 (74)
Issuances of long-term debt, net2,393
 4,593
 (2,200) 7,315
 (2,722)
Notes payable and commercial paper(362) (1,447) 1,245
1,171
 (362) 1,533
 (1,447) 1,085
Dividends paid(2,450) (2,332) (2,254)(2,471) (2,450) (21) (2,332) (118)
Repurchase of common shares
 
 (1,500)
Other financing items1
 (16) (36)29
 1
 28
 (16) 17
Net cash provided by (used in) financing activities$1,782
 $4,251
 $(2,602)
Net cash provided by financing activities$2,960
 $1,782
 $1,178
 $4,251
 $(2,469)
For the year ended December 31, 2018, compared to 2017, the variance was driven primarily by:
a $1,838 million increase in proceeds from the issuance of common stock; and
a $1,533 million increase in net borrowings from notes payable and commercial paper primarily due to increased funding requirements for capital expenditures and storm costs.
Partially offset by:
a $2,200 million net decrease in proceeds from issuances of long-term debt primarily due to timing related to refinancing of existing maturities, fund growth and general corporate needs.
For the year ended December 31, 2017, compared to 2016, the variance was driven primarily by:
a $2,722 million net decrease in proceeds from issuances of long-term debt driven principally by the prior year $3,750 million of senior unsecured notes used to fund a portion of the Piedmont acquisition, offset primarily by $900 million of first mortgage bonds issued by Duke Energy Florida in the current year to fund capital expenditures for ongoing construction and capital maintenance and for general corporate purposes;
a $731 million decrease in proceeds from stock issuances used to fund a portion of the Piedmont acquisition in 2016; and
a $118 million current year increase in dividends paid.
Partially offset by:
a $1,085 million decrease in net borrowings from notes payable and commercial paper primarily due to the use of proceeds from $1,294 million nuclear asset-recovery bonds issued at Duke Energy Florida in 2016 to pay down outstanding commercial paper.
For the year ended December 31, 2016, compared to 2015, the variance was driven primarily by:

a $7,389 million increase in proceeds from net issuances of long-term debt mainly due to the issuances of $3,750 million of senior unsecured notes used to fund a portion of the Piedmont acquisition, $1,294 million of nuclear asset-recovery bonds and other issuances primarily used to fund capital expenditures, pay down outstanding commercial paper and repay debt maturities;
a $1,500 million decrease in cash outflows due to the 2015 repurchase of 19.8 million common shares under the ASR; and
a $714 million increase in proceeds resulting from the issuance of common stock to fund the acquisition of Piedmont.
Partially offset by:
MD&AOFF-BALANCE SHEET ARRANGEMENTS AND CONTRACTUAL OBLIGATIONS
a $2,692 million increase in cash outflows for the net payments of notes payable and commercial paper primarily through the use of proceeds from $1,294 million nuclear asset-recovery bonds issued at Duke Energy Florida, further increased by the use of short-term debt in 2015 to repay long-term debt maturities at Duke Energy Florida in advance of the 2016 proceeds from the nuclear asset-recovery bonds.

Off-Balance Sheet Arrangements
Duke Energy and certain of its subsidiaries enter into guarantee arrangements in the normal course of business to facilitate commercial transactions with third parties. These arrangements include performance guarantees, stand-bystandby letters of credit, debt guarantees, surety bonds and indemnifications.

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Most of the guarantee arrangements entered into by Duke Energy enhance the credit standing of certain subsidiaries, non-consolidated entities or less than wholly owned entities, enabling them to conduct business. As such, these guarantee arrangements involve elements of performance and credit risk, which are not always included on the Consolidated Balance Sheets. The possibility of Duke Energy, either on its own or on behalf of Spectra Energy Capital, LLC (Spectra Capital) through indemnification agreements entered into as part of the January 2, 2007, spin-off of Spectra Energy Corp, having to honor its contingencies is largely dependent upon the future operations of the subsidiaries, investees and other third parties, or the occurrence of certain future events.
Duke Energy performs ongoing assessments of its respective guarantee obligations to determine whether any liabilities have been incurred as a result of potential increased non-performance risk by third parties for which Duke Energy has issued guarantees.
See Note 7 to the Consolidated Financial Statements, “Guarantees and Indemnifications,” for further details of the guarantee arrangements.
Issuance of these guarantee arrangements is not required for the majority of Duke Energy’s operations. Thus, if Duke Energy discontinued issuing these guarantees, there would not be a material impact to the consolidated results of operations, cash flows or financial position.
Other than the guarantee arrangements discussed above, normal operating lease arrangements and off-balance sheet debt related to non-consolidated VIEs, Duke Energy does not have any material off-balance sheet financing entities or structures. For additional information, see Notes 5 7 and 17 to the Consolidated Financial Statements, “Commitments and Contingencies,” "Guarantees and Indemnifications"Contingencies" and "Variable Interest Entities," respectively.
Contractual Obligations
Duke Energy enters into contracts that require payment of cash at certain specified periods, based on certain specified minimum quantities and prices. The following table summarizes Duke Energy’s contractual cash obligations as of December 31, 2017.2018.
Payments Due By PeriodPayments Due By Period
        More than
        More than
  Less than
 2-3 years
 4-5 years
 5 years
  Less than
 2-3 years
 4-5 years
 5 years
  1 year
 (2019 &
 (2021 &
 (2023 &
  1 year
 (2020 &
 (2022 &
 (2024 &
(in millions)Total
 (2018)
 2020)
 2022)
 beyond)
Total
 (2019)
 2021)
 2023)
 beyond)
Long-term debt(a)
$49,962
 $3,127
 $7,062
 $6,541
 $33,232
$52,446
 $3,291
 $8,311
 $5,861
 $34,983
Interest payments on long-term debt(b)
30,943
 2,014
 3,590
 3,144
 22,195
32,834
 2,121
 3,823
 3,329
 23,561
Capital leases(c)
1,601
 168
 343
 345
 745
1,428
 170
 351
 330
 577
Operating leases(c)
1,786
 233
 386
 285
 882
1,991
 239
 405
 330
 1,017
Purchase obligations:(d)
 
  
  
  
  
 
  
  
  
  
Fuel and purchased power(e)(f)
30,956
 4,506
 6,085
 4,474
 15,891
20,496
 4,329
 5,315
 3,153
 7,699
Other purchase obligations(g)
8,726
 6,642
 1,406
 121
 557
12,436
 4,617
 1,178
 775
 5,866
Nuclear decommissioning trust annual funding(h)
285
 14
 28
 28
 215
482
 24
 48
 48
 362
Total contractual cash obligations(i)(j)
$124,259
 $16,704
 $18,900
 $14,938
 $73,717
Land easements(i)
234
 10
 20
 20
 184
Total contractual cash obligations(j)(k)
$122,347
 $14,801
 $19,451
 $13,846
 $74,249
(a)See Note 6 to the Consolidated Financial Statements, “Debt and Credit Facilities.”
(b)Interest payments on variable rate debt instruments were calculated using December 31, 2017,2018, interest rates and holding them constant for the life of the instruments.
(c)See Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies.” Amounts in the table above include the interest component of capital leases based on the interest rates stated in the lease agreements and exclude certain related executory costs. Amounts exclude contingent lease obligations.
(d)Current liabilities, except for current maturities of long-term debt, and purchase obligations reflected on the Consolidated Balance Sheets have been excluded from the above table.
(e)Includes firm capacity payments that provide Duke Energy with uninterrupted firm access to electricity transmission capacity and natural gas transportation contracts, as well as undesignated contracts and contracts that qualify as normal purchase/normal sale (NPNS).NPNS. For contracts where the price paid is based on an index, the amount is based on market prices at December 31, 2017,2018, or the best projections of the index. For certain of these amounts, Duke Energy may settle on a net cash basis since Duke Energy has entered into payment netting arrangements with counterparties that permit Duke Energy to offset receivables and payables with such counterparties.
(f)Amounts exclude obligations under the OVEC purchase power agreement. See Note 17 to the Consolidated Financial Statements, "Variable Interest Entities," for additional information.
(g)Includes contracts for software, telephone, data and consulting or advisory services. Amount also includes contractual obligations for engineering, procurement and constructionEPC costs for new generation plants, wind and solar facilities, plant refurbishments, maintenance and day-to-day contract work and commitments to buy certain products. Amount excludes certain open purchase orders for services that are provided on demand, for which the timing of the purchase cannot be determined.
(h)Related to future annual funding obligations to NDTF through nuclear power stations' relicensing dates. See Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations."
(i)Related to Commercial Renewables wind and solar facilities.



MD&AOFF-BALANCE SHEET ARRANGEMENTS AND CONTRACTUAL OBLIGATIONS


(j)Unrecognized tax benefits of $25$24 million are not reflected in this table as Duke Energy cannot predict when open income tax years will close with completed examinations. See Note 2223 to the Consolidated Financial Statements, "Income Taxes."

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(j)(k)The table above excludes reserves for litigation, environmental remediation, asbestos-related injuries and damages claims and self-insurance claims (see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies”) because Duke Energy is uncertain as to the timing and amount of cash payments that will be required. Additionally, the table above excludes annual insurance premiums that are necessary to operate the business, including nuclear insurance (see Note 5 to the Consolidated Financial Statements, “Commitments and Contingencies”), funding of pension and other post-retirement benefit plans (see Note 2122 to the Consolidated Financial Statements, "Employee Benefit Plans"), AROs, including ash management expenditures (see Note 9 to the Consolidated Financial Statements, "Asset Retirement Obligations") and regulatory liabilities (see Note 4 to the Consolidated Financial Statements, “Regulatory Matters”) because the amount and timing of the cash payments are uncertain. Also excluded are Deferred Income Taxes and ITCs recorded on the Consolidated Balance Sheets since cash payments for income taxes are determined based primarily on taxable income for each discrete fiscal year.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Risk Management Policies
The Enterprise Risk Management policy framework at Duke Energy includes strategy, operational, project execution and financial or transaction related risks. Enterprise Risk Management includes market risk as part of the financial and transaction related risks in its framework.
Duke Energy is exposed to market risks associated with commodity prices, interest rates and equity prices. Duke Energy has established comprehensive risk management policies to monitor and manage these market risks. Duke Energy’s Chief Executive Officer and Chief Financial Officer are responsible for the overall approval of market risk management policies and the delegation of approval and authorization levels. The Finance and Risk Management Committee of the Board of Directors receives periodic updates from the Chief Risk Officer and other members of management on market risk positions, corporate exposures and overall risk management activities. The Chief Risk Officer is responsible for the overall governance of managing commodity price risk, including monitoring exposure limits.
The following disclosures about market risk contain forward-looking statements that involve estimates, projections, goals, forecasts, assumptions, risks and uncertainties that could cause actual results or outcomes to differ materially from those expressed in the forward-looking statements. Please reviewSee Item 1A, “Risk Factors,” and “Cautionary Statement Regarding Forward-Looking Information” for a discussion of the factors that may impact any such forward-looking statements made herein.
Commodity Price Risk
Duke Energy is exposed to the impact of market fluctuations in the prices of electricity, coal, natural gas and other energy-related products marketed and purchased as a result of its ownership of energy-related assets. Duke Energy’s exposure to these fluctuations is limited by the cost-based regulation of its regulated operations as these operations are typically allowed to recover substantially all of these costs through various cost-recovery clauses, including fuel clauses, formula based contracts, or other cost-sharing mechanisms. While there may be a delay in timing between when these costs are incurred and when they are recovered through rates, changes from year to year generally do not have a material impact on operating results of these regulated operations.
Price risk represents the potential risk of loss from adverse changes in the market price of electricity or other energy commodities. Duke Energy’s exposure to commodity price risk is influenced by a number of factors, including contract size, length, market liquidity, location and unique or specific contract terms. Duke Energy employs established policies and procedures to manage risks associated with these market fluctuations, which may include using various commodity derivatives, such as swaps, futures, forwards and options. For additional information, see Note 14 to the Consolidated Financial Statements, “Derivatives and Hedging.”
The inputs and methodologies used to determine the fair value of contracts are validated by an internal group separate from Duke Energy’s deal origination function. While Duke Energy uses common industry practices to develop its valuation techniques, changes in its pricing methodologies or the underlying assumptions could result in significantly different fair values and income recognition.
Hedging Strategies
Duke Energy closely monitors risks associated with commodity price changes on its future operations and, where appropriate, uses various commodity instruments such as electricity, coal and natural gas forward contracts and options to mitigate the effect of such fluctuations on operations. Duke Energy’s primary use of energy commodity derivatives is to hedge against exposure to the prices of power, fuel for generation and natural gas for customers.
The majority of instruments used to manage Duke Energy’s commodity price exposure are either not designated as hedges or do not qualify for hedge accounting. These instruments are referred to as undesignated contracts. Mark-to-market changes for undesignated contracts entered into by regulated businesses are reflected as regulatory assets or liabilities on the Consolidated Balance Sheets. Undesignated contracts entered into by unregulated businesses are marked-to-market each period, with changes in the fair value of the derivative instruments reflected in earnings.
Duke Energy may also enter into other contracts that qualify for the NPNS exception. When a contract meets the criteria to qualify as NPNS, Duke Energy applies such exception. Income recognition and realization related to NPNS contracts generally coincide with the physical delivery of the commodity. For contracts qualifying for the NPNS exception, no recognition of the contract’s fair value in the Consolidated Financial Statements is required until settlement of the contract as long as the transaction remains probable of occurring.



MD&AQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK


Generation Portfolio Risks 
The Duke Energy Registrants optimize the value of their generation portfolios, which include generation assets, fuel and emission allowances. Modeled forecasts of future generation output and fuel requirements are based on forward power and fuel markets. The component pieces of the portfolio are bought and sold based on models and forecasts of generation in order to manage the economic value of the portfolio in accordance with the strategies of the business units.

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For the Electric Utilities and Infrastructure segment, the generation portfolio not utilized to serve retail operations or committed load is subject to commodity price fluctuations. However, the impact on the Consolidated Statements of Operations is partially offset by mechanisms in these regulated jurisdictions that result in the sharing of net profits from these activities with retail customers.
Interest Rate Risk
Duke Energy is exposed to risk resulting from changes in interest rates as a result of its issuance or anticipated issuance of variable and fixed-rate debt and commercial paper. Duke Energy manages interest rate exposure by limiting variable-rate exposures to a percentage of total debt and by monitoring the effects of market changes in interest rates. Duke Energy also enters into financial derivative instruments, which may include instruments such as, but not limited to, interest rate swaps, swaptions and U.S. Treasury lock agreements to manage and mitigate interest rate risk exposure. See Notes 1, 6, 14 and 16 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” “Debt and Credit Facilities,” “Derivatives and Hedging,” and “Fair Value Measurements.”
At December 31, 2017,2018, Duke Energy had $687$1.2 billion of U.S. treasury lock agreements, $644 million notional amount of floating-to-fixed swaps outstanding, $500 million notional amount of fixed-to-floating swaps outstanding and $400$300 million forward-starting swaps outstanding. Duke Energy had $6.1$8.0 billion of unhedged long- and short-term floating interest rate exposure at December 31, 2017.2018. The impact of a 100 basis point change in interest rates on pretax income is approximately $61$80 million at December 31, 2017.2018. This amount was estimated by considering the impact of the hypothetical interest rates on variable-rate securities outstanding, adjusted for interest rate hedges as of December 31, 2017.2018.
See Note 14, "Derivatives and Hedging," to the Consolidated Financial Statements for additional information about the forward-starting interest rate swaps related to the Piedmont acquisition.
Credit Risk
Credit risk represents the loss that the Duke Energy Registrants would incur if a counterparty fails to perform under its contractual obligations. Where exposed to credit risk, the Duke Energy Registrants analyze the counterparty's financial condition prior to entering into an agreement and monitor exposure on an ongoing basis. The Duke Energy Registrants establish credit limits where appropriate in the context of contractual arrangements and monitor such limits.
To reduce credit exposure, the Duke Energy Registrants seek to include netting provisions with counterparties, which permit the offset of receivables and payables with such counterparties. The Duke Energy Registrants also frequently use master agreements with credit support annexes to further mitigate certain credit exposures. The master agreements provide for a counterparty to post cash or letters of credit to the exposed party for exposure in excess of an established threshold. The threshold amount represents a negotiated unsecured credit limit for each party to the agreement, determined in accordance with the Duke Energy Registrants’ internal corporate credit practices and standards. Collateral agreements generally also provide that the inability to post collateral is sufficient cause to terminate contracts and liquidate all positions.
The Duke Energy Registrants also obtain cash or letters of credit from certain counterparties to provide credit support outside of collateral agreements, where appropriate, based on a financial analysis of the counterparty and the regulatory or contractual terms and conditions applicable to each transaction. See Note 14 to the Consolidated Financial Statements, “Derivatives and Hedging,” for additional information regarding credit risk related to derivative instruments.
The Duke Energy Registrants’ principal counterparties for its electric and natural gas businesses are regional transmission organizations, distribution companies, municipalities, electric cooperatives and utilities located throughout the U.S. The Duke Energy Registrants have concentrations of receivables from such entities throughout these regions. These concentrations of receivables may affect the Duke Energy Registrants’ overall credit risk in that risk factors can negatively impact the credit quality of the entire sector.
The Duke Energy Registrants are also subject to credit risk from transactions with their suppliers that involve prepayments in conjunction with outsourcing arrangements, major construction projects and certain commodity purchases. The Duke Energy Registrants’ credit exposure to such suppliers may take the form of increased costs or project delays in the event of non-performance. The Duke Energy Registrants' frequently require guarantees or letters of credit from suppliers to mitigate this credit risk.
Credit risk associated with the Duke Energy Registrants’ service to residential, commercial and industrial customers is generally limited to outstanding accounts receivable. The Duke Energy Registrants mitigate this credit risk by requiring customers to provide a cash deposit, letter of credit or surety bond until a satisfactory payment history is established, subject to the rules and regulations in effect in each retail jurisdiction, at which time the deposit is typically refunded. Charge-offs for retail customers have historically been insignificant to the operations of the Duke Energy Registrants and are typically recovered through retail rates. Management continually monitors customer charge-offs and payment patterns to ensure the adequacy of bad debt reserves. Duke Energy Ohio and Duke Energy Indiana sell certain of their accounts receivable and related collections through Cinergy Receivables Company LLC (CRC),CRC, a Duke Energy consolidated variable interest entity. Losses on collection are first absorbed by the equity of CRC and next by the subordinated retained interests held by Duke Energy Ohio, Duke Energy Kentucky and Duke Energy Indiana. See Note 17 to the Consolidated Financial Statements, “Variable Interest Entities.” Duke Energy also provides certain non-tariff services, primarily to large commercial and industrial customers, in which incurred costs are intended to be recovered from the individual customer and therefore are not subject to rate recovery in the event of customer default. Customer credit worthiness is assessed prior to entering into these transactions.



MD&AQUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK


Duke Energy’s Commercial Renewables business segment enters into long-term agreements with certain creditworthy buyers that may not include the right to call for collateral in the event of a credit rating downgrade, and is therefore exposed to market price risk and credit risk related to these agreements. Credit concentration exists to certain counterparties on these agreements.
Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. Duke Energy Carolinas’ cumulative payments began to exceed the self-insurance retention in 2008. Future payments upSee Note 5 to the policy limit will be reimbursed by the third-party insurance carrier. The insurance policy limitConsolidated Financial Statements, "Commitments and Contingencies" for potential future insurance recoveries indemnificationinformation on asbestos-related injuries and medical cost claim payments is $797 million in excess of the self-insured retention. Receivables for insurance recoveries were $489 million and $587 million at December 31, 2017, and 2016, respectively. These amounts are classified in Other within Other Noncurrent Assets on the Consolidated Balance Sheets. Duke Energy Carolinas is not aware of any uncertainties regarding the legal sufficiency of insurancedamages claims. Duke Energy Carolinas believes the insurance recovery asset is probable of recovery as the insurance carrier continues to have a strong financial strength rating.

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The Duke Energy Registrants also have credit risk exposure through issuance of performance and financial guarantees, letters of credit and surety bonds on behalf of less than wholly owned entities and third parties. Where the Duke Energy Registrants have issued these guarantees, it is possible that they could be required to perform under these guarantee obligations in the event the obligor under the guarantee fails to perform. Where the Duke Energy Registrants have issued guarantees related to assets or operations that have been disposed of via sale, they attempt to secure indemnification from the buyer against all future performance obligations under the guarantees. See Note 7 to the Consolidated Financial Statements, “Guarantees and Indemnifications,” for further information on guarantees issued by the Duke Energy Registrants.
Based on the Duke Energy Registrants’ policies for managing credit risk, their exposures and their credit and other reserves, the Duke Energy Registrants do not currently anticipate a materially adverse effect on their consolidated financial position or results of operations as a result of non-performance by any counterparty.
Marketable Securities Price Risk
As described further in Note 15 to the Consolidated Financial Statements, “Investments in Debt and Equity Securities,” Duke Energy invests in debt and equity securities as part of various investment portfolios to fund certain obligations. The vast majority of investments in equity securities are within the NDTF and assets of the various pension and other post-retirement benefit plans.
Pension Plan Assets
Duke Energy maintains investments to facilitate funding the costs of providing non-contributory defined benefit retirement and other post-retirement benefit plans. These investments are exposed to price fluctuations in equity markets and changes in interest rates. The equity securities held in these pension plans are diversified to achieve broad market participation and reduce the impact of any single investment, sector or geographic region. Duke Energy has established asset allocation targets for its pension plan holdings, which take into consideration the investment objectives and the risk profile with respect to the trust in which the assets are held. See Note 2122 to the Consolidated Financial Statements, “Employee Benefit Plans,” for additional information regarding investment strategy of pension plan assets.
A significant decline in the value of plan asset holdings could require Duke Energy to increase funding of its pension plans in future periods, which could adversely affect cash flows in those periods. Additionally, a decline in the fair value of plan assets, absent additional cash contributions to the plan, could increase the amount of pension cost required to be recorded in future periods, which could adversely affect Duke Energy’s results of operations in those periods.
Nuclear Decommissioning Trust Funds
As required by the NRC, NCUC, PSCSC and FPSC, subsidiaries of Duke Energy maintain trust funds to fund the costs of nuclear decommissioning. As of December 31, 2017,2018, these funds were invested primarily in domestic and international equity securities, debt securities, cash and cash equivalents and short-term investments. Per the NRC, Internal Revenue Code, NCUC, PSCSC and FPSC requirements, these funds may be used only for activities related to nuclear decommissioning. These investments are exposed to price fluctuations in equity markets and changes in interest rates. Duke Energy actively monitors its portfolios by benchmarking the performance of its investments against certain indices and by maintaining, and periodically reviewing, target allocation percentages for various asset classes.
Accounting for nuclear decommissioning recognizes that costs are recovered through retail and wholesale rates; therefore, fluctuations in investment prices do not materially affect the Consolidated Statements of Operations, as changes in the fair value of these investments are primarily deferred as regulatory assets or regulatory liabilities pursuant to Orders by the NCUC, PSCSC, FPSC and FERC. Earnings or losses of the fund will ultimately impact the amount of costs recovered through retail and wholesale rates. See Note 9 to the Consolidated Financial Statements, “Asset Retirement Obligations,” for additional information regarding nuclear decommissioning costs. See Note 15 to the Consolidated Financial Statements, “Investments in Debt and Equity Securities,” for additional information regarding NDTF assets.
OTHER MATTERS
Ratios of Earnings to Fixed Charges
The Duke Energy Registrants’ ratios of earnings to fixed charges, as calculated using SEC guidelines, are included in the tables below.
 Years Ended December 31,
 2017
 2016
 2015
Duke Energy2.9
 2.7
 3.1
Duke Energy Carolinas4.8
 4.7
 4.7
Progress Energy2.7
 3.0
 2.9
Duke Energy Progress4.1
 4.0
 3.7
Duke Energy Florida3.3
 4.3
 4.3
Duke Energy Ohio3.4
 3.8
 3.6
Duke Energy Indiana4.4
 4.1
 3.6
 Year Ended Two Months Ended Years Ended October 31,
 December 31, 2017
 December 31, 2016
 2016 2015
Piedmont3.3
 6.6
 4.7
 3.7

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Environmental Regulations
The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. These regulations can be changed from time to time and result in new obligations of the Duke Energy Registrants.
The following sections outline various proposed and recently enacted legislation and regulations that may impact the Duke Energy Registrants. Refer to Note 4 to the Consolidated Financial Statements, "Regulatory Matters," for further information regarding potential plant retirements and regulatory filings related to the Duke Energy Registrants.



MD&AOTHER MATTERS


Coal Combustion Residuals
In April 2015, EPA published a rule to regulate the disposal of CCR from electric utilities as solid waste. The federal regulation classifies CCR as nonhazardous waste and allows for beneficial use of CCR with some restrictions. The regulation applies to all new and existing landfills, new and existing surface impoundments receiving CCR and existing surface impoundments that are no longer receiving CCR but contain liquid located at stations currently generating electricity (regardless of fuel source). The rule establishes requirements regarding landfill design, structural integrity design and assessment criteria for surface impoundments, groundwater monitoring, protection and remedial procedures and other operational and reporting procedures to ensure the safe disposal and management of CCR. Various industry and environmental parties have appealed EPA's CCR rule in the U.S. Court of Appeals for the District of Columbia (D.C.D.C. Circuit Court).Court. On April 18, 2016, EPA filed a motion with the federal court to settle five issues raised in litigation. On June 14, 2016, the court approved the motion with respect to all of those issues. Duke Energy does not expect a material impact from the settlement or that it will result in additional ARO adjustments. On September 13, 2017, EPA responded to a petition by the Utility Solid Waste Activities Group that the agency would reconsider certain provisions of the final rule, and asked the D.C. Circuit Court to suspend the litigation. The D.C. Circuit Court denied EPA’s petition to suspend the litigation and oral argument was held on November 20, 2017. The court has not issued an order in the matter. Duke Energy cannot predict the outcome of the litigation.
In a November 15, 2017, status report filed withOn August 21, 2018, the D.C. Circuit Court,issued its decision in the CCR rule litigation denying relief for industry petitioners' remaining claims and ruling in favor of environmental petitioners on a number of their challenges, including the regulation of inactive CCR surface impoundments at retired plants and the continued operation of unlined impoundments.
On March 15, 2018, EPA listedpublished proposed amendments to the provisions it intendsfederal CCR rule, including revisions that were required as part of a CCR litigation settlement, as well as changes that the agency considers warranted due to reconsider, including provisions that warrant revision due tothe passage of the Water Infrastructure Improvements for the Nation Act, which allowsprovides statutory authority for implementation of the CCR rule through state orand federal permit programs. On July 17, 2018, EPA has indicated it will issueissued a proposed rule (Phase 1, Part 1) finalizing certain, but not all, elements included in earlythe agency's March 15, 2018, that includes provisions from the June 2016 settlement with petitionersproposal. The final rule revises certain closure deadlines and additional provisions under reconsideration. The reconsideration would not repealgroundwater protection standards in the CCR rule; rather, it would modify some requirements to align with the implementation of the rule through permit programs. At this time, Duke Energyrule. It does not expect a reconsideration rulemaking to have a material impact on itschange the primary requirements for groundwater monitoring, corrective action, inspections and maintenance, and closure, and thus does not materially affect Duke Energy’s coal ash basin closure plans or compliance requirementsobligations under the CCR rule. On October 22, 2018, a coalition of environmental groups filed a petition for review in the D.C. Circuit Court challenging EPA's final Phase 1, Part 1 revisions to the CCR rule. Briefing in the case concluded in February 2019.
In addition to the requirements of the federal CCR regulation, CCR landfills and surface impoundments will continue to be independently regulated by most states. Cost recovery for future expenditures will be pursued through the normal ratemaking process with federal and state utility commissions and via wholesale contracts, which permit recovery of necessary and prudently incurred costs associated with Duke Energy’s regulated operations. For more information, see NoteNotes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and "Asset Retirement Obligations.Obligations," respectively.
Coal Ash Management Act of 2014
AROs recorded on the Duke Energy Carolinas and Duke Energy Progress Consolidated Balance Sheets at December 31, 2017,2018, and December 31, 2016,2017, include the legal obligation for closure of coal ash basins and the disposal of related ash as a result of the Coal Ash Act, the EPA CCR rule and other agreements. The Coal Ash Act requires Duke Energy to undertake dam improvement projects and to provide access to a permanent alternative drinking water source to certain residents within a half-mile of coal ash basin compliance boundaries and to certain other potentially impacted residents. The legislation requires excavation of the Sutton, Riverbend and Dan River basins by August 1, 2019, and Asheville basins by August 1, 2022. Excavation at these sites may include a combination of transfer of coal ash to an engineered landfill or conversion for beneficial use. Basins at the H.F. Lee, Cape Fear and Weatherspoon sites are required to be closed through excavation no later than August 1, 2028. Excavation at these sites can include conversion of the basin to a lined industrial landfill, transfer of ash to an engineered landfill or conversion for beneficial use. The remaining basins are required to be closed no later than December 31, 2024, through conversion to a lined industrial landfill, transfer to an engineered landfill or conversion for beneficial use, unless certain dam improvement projects and alternative drinking water source projects are completed by October 15, 2018. Upon satisfactory completion of these projects, the closure deadline would be extended to December 31, 2029, and could include closure through the combination of a cap system and a groundwater monitoring system.
Additionally, the Coal Ash Act requires the installation and operation of three large-scale coal ash beneficiation projects to produce reprocessed ash for use in the concrete industry. Duke Energy selected the Buck, H.F. Lee and Cape Fear plants for these projects. Closure at these sites is required to be completed no later than December 31, 2029.
The Coal Ash Act includes a variance procedure for compliance deadlines and other issues surrounding the management of CCR and CCR surface impoundments and prohibits cost recovery in customer rates for unlawful discharge of ash impoundment waters occurring after January 1, 2014. The Coal Ash Act leaves the decision on cost recovery determinations related to closure of ash impoundments to the normal ratemaking processes before utility regulatory commissions.
Consistent with the requirements of the Coal Ash Act, Duke Energy has submitted comprehensive site assessments and groundwater corrective plans to NCDEQ and will submit to NCDEQ site-specific coal ash impoundment closure plans in advance of closure. TheseIn support of these closure plans, on November 15, 2018, Duke Energy submitted options analyses, groundwater modeling and all associated permits mustnet environmental benefits analyses for six sites potentially eligible for closure by cap in place. Separately, on November 16, 2018, Duke Energy submitted a variance application requesting that NCDEQ grant a six-month extension to the closure deadline applicable to the CCR surface impoundments at the Sutton Plant. NCDEQ held a public meeting on January 14, 2019 at which it announced that an extension would be approvedappropriate. A final decision on the variance application is expected by NCDEQ before closure work can begin.April 15, 2019.



MD&AOTHER MATTERS


The current plans for each site are listed in the table below.
NCDEQ Risk ClassificationPlants/Current Closure DateExpected Closure Method
Low
Allen – December 31, 2029(a)
Belews Creek – December 31, 2029(a)
Buck – December 31, 2029(a)(b)
Rogers – December 31, 2029(a)
Marshall – December 31, 2029(a)
Mayo – December 31, 2029(a)
Roxboro – December 31, 2029(a)
Combination of a cap system and a groundwater monitoring system, or for selected sites, conversion for beneficial use.
Medium
H.F. Lee – December 31, 2029(b)
Cape Fear – December 31, 2029(b)
Weatherspoon – August 1, 2028
Excavation, which may include conversion of the basin to a lined industrial landfill, transferring coal ash to an engineered landfill, or for selected sites, conversion for beneficial use.
High
Sutton – August 1, 2019
Riverbend – August 1, 2019
Dan River – August 1, 2019
Asheville – August 1, 2022
Excavation, which may include a combination of transferring coal ash to an engineered landfill or for selected sites, conversion for beneficial use.
(a)In November 2018, the closure deadline for these basins was extended to December 31, 2029 as a result of the completion of certain dam improvement projects and alternative drinking water source projects by October 15, 2018.
(b)The Coal Ash Act requires the installation and operation of three large-scale coal ash beneficiation projects to produce reprocessed ash for use in the concrete industry. Duke Energy has selected the Buck, H.F. Lee and Cape Fear plants for these projects. Closure at these sites is required to be completed no later than December 31, 2029.
For further information on AROs,ash basins and recovery, see NoteNotes 4 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and “Asset Retirement Obligations.Obligations, respectively.

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Clean Water Act 316(b)
EPA published the final 316(b) cooling water intake structure rule on August 15, 2014, with an effective date of October 14, 2014. The rule applies to 26 of the electric generating facilities the Duke Energy Registrants own and operate. The rule allows for several options to demonstrate compliance and provides flexibility to the state environmental permitting agencies to make determinations on controls, if any, that will be required for cooling water intake structures. Any required intake structure modifications and/or retrofits are expected to be installed in the 2019 to 2023 time frame. Petitions challenging the rule have been filed by several groups. Oral argument was held on September 14, 2017. It is unknown when the courts will rule on the petitions. The Duke Energy Registrants cannot predict the outcome of these matters.
Steam Electric Effluent Limitations Guidelines
On January 4, 2016, the final Steam Electric Effluent Limitations Guidelines (ELG) rule became effective. The rule establishes new requirements for wastewater streams associated with steam electric power generation and includes more stringent controls for any new coal plants that may be built in the future. As originally written, affected facilities were required to comply between 2018 and 2023, depending on the timing of Clean Water Act (CWA) discharge permits. Most of the steam electric generating facilities the Duke Energy Registrants own are affected sources. The Duke Energy Registrants are well-positioned to meet the majority of the requirements of the rule due to current efforts to convert to dry ash handling. Petitions challenging the rule have been filed by several groups. On March 16, 2015, Duke Energy Indiana filed its own legal challenge to the rule with the Seventh Circuit Court of Appeals specific to the ELG rule focused on the limits imposed on IGCC facilities (gasification wastewater). All challenges to the rule were consolidated in the Fifth Circuit Court of Appeals. On August 22, 2017, the Fifth Circuit Court of Appeals granted EPA’s Motion to Govern Further Proceedings, thereby severing and suspending the claims related to flue gas desulfurization wastewater, bottom ash transport water and gasification wastewater. Claims regarding gasification wastewater were stayed, pending the issuance of the variance to Duke Energy Indiana. The litigation will continue as to claims related to other waste streams.
On August 7, 2017, EPA issued a public notice regarding its proposed decision to grant a variance to Duke Energy Indiana for mercury and total dissolved solids for gasification wastewater at its Edwardsport facility. The public comment period has ended, but EPA has not finalized its decision. Separate from the litigation, EPA finalized a rule on September 18, 2017, postponing the earliest applicability date for bottom ash transport water and flue gas desulfurization wastewater from 2018 to 2020 and retaining the end applicability date of 2023. Also, as part of the rule, EPA reiterated its intent to review the limitation guidelines for bottom ash transport water and flue gas desulfurization wastewater and potentially to conduct a new rulemaking to revise those guidelines.
The Duke Energy Registrants cannot predict the outcome of these matters.
Estimated Cost and Impacts of Rulemakings
Duke Energy will incur capital expenditures to comply with the environmental regulations and rules discussed above. The following table, as of December 31, 2018, provides five-year estimated costs, excluding AFUDC, of new control equipment that may need to be installed on existing power plants primarily to comply with the Coal Ash Act requirements for conversion to dry disposal of bottom ash and fly ash, CWA 316(b) and ELGs through December 31, 2022.2023. The table excludes ash basin closure costs recorded in Asset retirement obligations on the Consolidated Balance Sheets. For more information related to AROs, see Note 9 to the Consolidated Financial Statements.
(in millions)Five-Year Estimated Costs
Five-Year Estimated Costs
Duke Energy$920
$420
Duke Energy Carolinas380
185
Progress Energy360
200
Duke Energy Progress230
80
Duke Energy Florida130
120
Duke Energy Ohio70
15
Duke Energy Indiana110
20
The Duke Energy Registrants also expect to incur increased fuel, purchased power, operation and maintenance and other expenses, in addition to costs for replacement generation for potential coal-fired power plant retirements, as a result of these regulations. Actual compliance costs incurred may be materially different from these estimates due to reasons such as the timing and requirements of EPA regulations and the resolution of legal challenges to the rules. The Duke Energy Registrants intend to seek rate recovery of necessary and prudently incurred costs associated with regulated operations to comply with these regulations.

Other Environmental Regulations
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The Duke Energy Registrants are also subject to various federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters, including the following:
PART II
Clean Water Act

Steam Effluent Limitation Guidelines
Cross-State Air Pollution Rule
On December 3, 2015, EPA proposed a ruleCarbon Pollution Standards for New, Modified and Reconstructed Power Plants
Clean Power Plan/ACE Rule
Duke Energy continues to lower the Cross-State Air Pollution Rule (CSAPR) Phase 2 state ozone season nitrogen oxide (NOX) emission budgets for 23 eastern states, including North Carolina, Ohio, Kentuckycomply with enacted environmental laws and Indiana. EPA also proposed to eliminate the CSAPR Phase 2 ozone season state NOX budgets for Florida and South Carolina. On September 7, 2016, EPA finalized a CSAPR Update Rule that reduces the CSAPR Phase 2 state ozone season NOX emission budgets for 22 eastern states, including Ohio, Kentucky and Indiana. In the final CSAPR Update Rule, EPA removed Florida, South Carolina and North Carolina from the ozone season NOx program. Beginningregulations even as certain of these regulations are in 2017,various stages of clarification, revision or legal challenges. The Duke Energy Registrants incannot predict the outcome of these states will not be subject to any CSAPR ozone season NOx emission limitations. Formatters.



MD&AOTHER MATTERS


Section 126 Petitions
On November 16, 2016, the statesstate of Maryland filed a petition with EPA under Section 126 of the Clean Air Act alleging that remain in the program, the reduced state ozone season NOx emission budgets took effect on May 1, 2017. In Kentucky and Indiana, where19 power plants, including two plants (three units) that Duke Energy Registrants own and operate, coal-fired electric generating units (EGUs) subjectcontribute to violations of EPA’s NAAQS for ozone in the final rule requirements, near-term responses include changing unit dispatch to run certain generating units less frequently and/or purchasing NOx allowances fromstate of Maryland. On March 12, 2018, the trading market. Longer term, upgrading the performancestate of existing NOx controls is an option. The Indiana Utility Group and the Indiana Energy Association jointlyNew York filed a petition for reconsideration askingwith EPA, also under Section 126 of the Clean Air Act alleging that over 60 power plants, including four that Duke Energy Registrants own and operate, contribute to violations of EPA’s ozone NAAQS in the state of New York. Both Maryland and New York seek EPA correct errors it madeorders requiring the states in calculatingwhich the Indiana budget and increase the budget accordingly. EPA has yet to actnamed power plants operate impose more stringent NOx emission limitations on the plants. On October 5, 2018, EPA published a final rule denying the Maryland petition. Numerous parties have filed petitions withThat same day, Maryland appealed EPA's denial of their Section 126 petition to the D.C. Circuit Court challenging various aspectsCourt. The impact of these petitions could be more stringent requirements for the CSAPR Update Rule. Final briefs in the case are due April 9, 2018. The date for oral argument has not been established.operation of NOx emission controls at these plants. The Duke Energy Registrants cannot predict the outcome of these matters.
Carbon Pollution Standards for New, Modified and Reconstructed Power Plants
On October 23, 2015, EPA published a final rule in the Federal Register establishing carbon dioxide (CO2) emissions limits for new, modified and reconstructed power plants. The requirements for new plants apply to plants that commenced construction after January 8, 2014. EPA set an emissions standard for coal units of 1,400 pounds of CO2 per gross MWh, which would require the application of partial carbon capture and storage (CCS) technology for a coal unit to be able to meet the limit. Utility-scale CCS is not currently a demonstrated and commercially available technology for coal-fired EGUs, and therefore the final standard effectively prevents the development of new coal-fired generation. EPA set a final standard of 1,000 pounds of CO2 per gross MWh for new natural gas combined-cycle units.
On March 28, 2017, President Trump signed an executive order directing EPA to review the rule and determine whether to suspend, revise or rescind it. On the same day, the Department of Justice (DOJ) filed a motion with the D.C. Circuit Court requesting that the court stay the litigation of the rule while it is reviewed by EPA. Subsequent to the DOJ motion, the D.C. Circuit Court canceled oral argument in the case. On August 10, 2017, the court ordered that the litigation be suspended indefinitely. The rule remains in effect pending the outcome of litigation and EPA’s review. EPA has not announced a schedule for completing its review. The Duke Energy Registrants cannot predict the outcome of these matters, but do not expect the impacts of the current final standards will be material to Duke Energy's financial position, results of operations or cash flows.
Clean Power Plan
On October 23, 2015, EPA published in the Federal Register the final Clean Power Plan (CPP) rule that regulates CO2 emissions from existing fossil fuel-fired EGUs. The CPP established CO2 emission rates and mass cap goals that apply to existing fossil fuel-fired EGUs. Petitions challenging the rule were filed by several groups and on February 9, 2016, the Supreme Court issued a stay of the final CPP rule, halting implementation of the rule until legal challenges are resolved. States in which the Duke Energy Registrants operate have suspended work on the CPP in response to the stay. Oral arguments before 10 of the 11 judges on D.C. Circuit Court were heard on September 27, 2016. The court has not issued its opinion in the case.
On March 28, 2017, President Trump signed an executive order directing EPA to review the CPP and determine whether to suspend, revise or rescind the rule. On the same day, the DOJ filed a motion with the D.C. Circuit Court requesting that the court stay the litigation of the rule while it is reviewed by EPA. On April 28, 2017, the court issued an order to suspend the litigation for 60 days. On August 8, 2017, the court, on its own motion, extended the suspension of the litigation for an additional 60 days. On October 16, 2017, EPA issued a Notice of Proposed Rulemaking (NPR) to repeal the CPP based on a change to EPA’s legal interpretation of the section of the Clean Air Act (CAA) on which the CPP was based. In the proposal, EPA indicates that it has not determined whether it will issue a rule to replace the CPP, and if it will do so, when and what form that rule will take. The comment period on EPA's NPR ends April 26, 2018. On December 28, 2017, EPA issued an Advance Notice of Proposed Rulemaking (ANPRM) in which it seeks public comment on various aspects of a potential CPP replacement rule. The comment period on the ANPRM ends February 26, 2018. If EPA decides to move forward with a CPP replacement rule, it will need to issue a formal proposal for public comment. Litigation of the CPP remains on hold in the D.C. Circuit Court and the February 2016 U.S. Supreme Court stay of the CPP remains in effect. The Duke Energy Registrants cannot predict the outcome of these matters.
Global Climate Change
The Duke Energy Registrants’ greenhouse gas (GHG)GHG emissions consist primarily of CO2 and result primarily from operating a fleet of coal-fired and natural gas-fired power plants. In 2017,2018, the Duke Energy Registrants’ power plants emitted approximately 105 million tons of CO2. Future levels of CO2 emissions will be influenced by variables that include fuel prices, compliance with new or existing regulations, economic conditions that affect electricity demand and the technologies deployed to generate the electricity necessary to meet the customer demand.

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The Duke Energy Registrants have taken actions that have resulted in a reduction of CO2 emissions over time. Actions have included the retirement of 47 coal-fired EGUs with a combined generating capacity of 5,425 MW. Much of that capacity has been replaced with state-of-the-art highly efficient natural gas-fired generation that produces far fewer CO2CO2 emissions per unit of electricity generated. Duke Energy also has made investments to expand its portfolio of wind and solar projects, increase energy efficiency offerings and invest in its zero-CO2 emissions hydropower and nuclear plants. These efforts have diversified its system and significantly reduced CO2 emissions. Between 2005 and 2017,2018, the Duke Energy Registrants have collectively lowered the CO2 emissions from their electricity generation by more than 31 percent, which potentially lowers the exposure to any future mandatory CO2 emission reduction requirements or carbon tax, whether as a result of federal legislation, EPA regulation, state regulation or other as yet unknown emission reduction requirement. Duke Energy will continue to explore the use of currently-availablecurrently available and commercially-demonstratedcommercially demonstrated technology to reduce CO2 emissions, including energy efficiency, wind, solar, storage nuclear and carbon sequestration.nuclear. Duke Energy will adjust to evolving and innovative technologies in a way that balances the reliability and affordability that customers expect. Under any future scenario involving mandatory CO2 limitations, the Duke Energy Registrants would plan to seek recovery of their compliance costs through appropriate regulatory mechanisms.
The Duke Energy Registrants recognize certain groups associate severe weather events with increasing levels of GHGs in the atmosphere and forecast the possibility these weather events could have a material impact on future results of operations should they occur more frequently and with greater severity. However, the uncertain nature of potential changes in extreme weather events (such as increased frequency, duration and severity), the long period of time over which any potential changes might take place and the inability to predict potential changes with any degree of accuracy, make estimating any potential future financial risk to the Duke Energy Registrants’ operations impossible. The Duke Energy Registrants have historically planned and prepared for extreme weather events, such as ice storms, tornadoes, hurricanes, severe thunderstorms, high winds and droughts they occasionally experience.
The Duke Energy Registrants annually, biannually or triennially prepare lengthy, forward-looking “integrated resource plans” (IRPs).IRPs. These detailed, highly technical plans are based on the company’s thorough analysis of numerous factors that can impact the cost of producing and delivering electricity that influence long-term resource planning decisions. The IRP process helps to evaluate a range of options, taking into account forecasts of future electricity demand, fuel prices, transmission improvements, new generating capacity, integration of renewables, energy storage, energy efficiency and demand response initiatives. The IRP process also helps evaluate potential environmental and regulatory scenarios to better mitigate policy and economic risks. The IRPs we file with regulators look out 10 to 20 years depending on the jurisdiction.
For a number of years, the Duke Energy Registrants have included a price on CO2 emissions in their IRP planning process to account for the potential regulation of CO2 emissions. Incorporating a price on CO2 emissions in the IRPIRPs allows for the evaluation of existing and future resource needs against potential climate change policy risk in the absence of policy certainty. One of the challenges with using a CO2 price, especially in the absence of a clear and certain policy, is determining the appropriate price to use. To address this uncertainty and ensure the company remains agile, the Duke Energy Registrants typically use a range of potential CO2 prices to reflect a range of potential policy outcomes.
The Duke Energy Registrants routinely take steps to reduce the potential impact of severe weather events on their electric distribution systems.systems by modernizing the electric grid through smart meters, storm hardening, self-healing and targeted undergrounding and applying lessons learned from previous storms to restoration efforts. The Duke Energy Registrants’ electric generating facilities are designed to withstand extreme weather events without significant damage. The Duke Energy Registrants maintain an inventory of coal and oil on-site to mitigate the effects of any potential short-term disruption in fuel supply so they can continue to provide customers with an uninterrupted supply of electricity.
North CarolinaState Legislation
In July 2017, the North Carolina General Assembly passed House Bill 589, and it was subsequently enacted into law by the governor. The law includes, among other things, overall reform of the application of Public Utility Regulatory Policies Act of 1978 (PURPA)PURPA for new solar projects in the state, a requirement for the utility to procure approximately 2,600 MW of renewable energy through a competitive bidding process and recovery of costs related to the competitive bidding process through the fuel clause and a competitive procurement rider. The law stipulated certain deadlines for Duke Energy to file for NCUC approval of programs required under the law. Duke Energy has made some regulatory filings since the passage of the law and will continue to implement the requirements of House Bill 589.
Nuclear MattersIn July 2018, Duke Energy issued an RFP for the first tranche of 680 MW. In accordance with the provisions of HB 589, total procurement will be changed based upon how much generation with no economic dispatch or curtailment occurs over the procurement period. Most of this type of generation is solar procured under PURPA. Based upon the current forecasted amount of such generation that will occur over procurement period, Duke Energy estimates the total under HB 589 competitive procurement will be approximately 1,500 to 2,000 MW.
Following the events at the Fukushima Daiichi nuclear power station in Japan, in March 2011, the NRC formed a task forceIn various states, legislation is being considered to conduct a comprehensive reviewallow third-party sales of processes and regulations to determine whether the agency should make additional improvements to the nuclear regulatory system. Subsequently, the NRC targeted a set of improvements designed to enhance accident mitigation, strengthen emergency preparedness and improve efficiency of NRC programs. Pursuant to the findings of the task force, in March 2012, the NRC issued three regulatory orders requiring safety enhancements related to mitigation strategies to respond to extreme natural events resultingelectricity. Deregulation or restructuring in the losselectric industry may result in increased competition and unrecovered costs. The Duke Energy Registrants cannot predict the outcome of powerthese initiatives.



MD&AOTHER MATTERS


Liquefied Natural Gas Facility
Piedmont Natural Gas plans to build a liquefied natural gas facility in Robeson County, North Carolina. The project is expected to be completed in the summer of 2021 at a plant, ensuring reliable hardened containment vents and enhancing spent fuel pool instrumentation. Duke Energy is committed to compliance with all safety enhancements ordered bycost of $250 million. Construction will begin in the NRC and has completed actions on twosummer of the three NRC orders, as required. The remaining order is focused only on enhancements to boiling water reactor designs which, for Duke Energy, is unique to Brunswick Steam Electric Plant. Actions associated with this third order will be completed by March 2019. With the NRC’s continuing review of this matter, Duke Energy cannot predict to what extent the NRC will impose additional licensing and safety-related requirements or the costs of complying with such requirements. Upon receipt of additional guidance from the NRC and a collaborative industry review, Duke Energy will be able to determine an implementation plan and associated costs. See Item 1A, “Risk Factors,” for further discussion of applicable risk factors.
New Accounting Standards
See Note 1 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” for a discussion of the impact of new accounting standards.
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 

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See “Management’s Discussion and Analysis of Results of Operations and Financial Condition – Quantitative and Qualitative Disclosures About Market Risk.”



84

FINANCIAL STATEMENTS

PART II

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
Duke Energy Corporation (Duke Energy) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows 
Consolidated Statements of Changes in Equity
  
Duke Energy Carolinas LLC (Duke Energy Carolinas) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  
Progress Energy Inc. (Progress Energy) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  
Duke Energy Progress LLC (Duke Energy Progress) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  
Duke Energy Florida LLC (Duke Energy Florida) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  
Duke Energy Ohio Inc. (Duke Energy Ohio) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  
Duke Energy Indiana LLC (Duke Energy Indiana) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  
Piedmont Natural Gas Company, Inc. (Piedmont) 
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
  



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FINANCIAL STATEMENTS

PART II

Combined Notes to Consolidated Financial Statements 
Note 1 – Summary of Significant Accounting Policies
Note 2 – Acquisitions and Dispositions
Note 3 – Business Segments
Note 4 – Regulatory Matters
Note 5 – Commitments and Contingencies
Note 6 – Debt and Credit Facilities
Note 7 – Guarantees and Indemnifications
Note 8 – Joint Ownership of Generating and Transmission Facilities
Note 9 – Asset Retirement Obligations
Note 10 – Property, Plant and Equipment
Note 11 – Goodwill and Intangible Assets
Note 12 – Investments in Unconsolidated Affiliates
Note 13 – Related Party Transactions
Note 14 – Derivatives and Hedging
Note 15 – Investments in Debt and Equity Securities
Note 16 – Fair Value Measurements
Note 17 – Variable Interest Entities
Note 18 – Revenue
Note 1819 – Common Stock
Note 1920 – Severance
Note 2021 – Stock-Based Compensation
Note 2122 – Employee Benefit Plans
Note 2223 – Income Taxes
Note 2324 – Other Income and Expenses, Net
Note 25 – Subsequent Events
Note 24 – Subsequent Events
Note 2526 – Quarterly Financial Data (Unaudited)



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REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of Duke Energy Corporation
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Corporation and subsidiaries (the "Company") as of December 31, 20172018 and 2016,2017, the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2017,2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20172018 and 2016,2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017,2018, in conformity with the accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2017,2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 23, 2018,28, 2019, expressed an unqualified opinion on the Company’sCompany's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019
We have served as the Company's auditor since 1947.



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FINANCIAL STATEMENTS

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DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS
Years Ended December 31,Years Ended December 31,
(in millions, except per share amounts)2017
 2016
 2015
2018
 2017
 2016
Operating Revenues          
Regulated electric$21,177
 $21,221
 $21,379
$22,097
 $21,177
 $21,221
Regulated natural gas1,734
 863
 536
1,773
 1,734
 863
Nonregulated electric and other654
 659
 456
651
 654
 659
Total operating revenues23,565
 22,743
 22,371
24,521
 23,565
 22,743
Operating Expenses          
Fuel used in electric generation and purchased power6,350
 6,625
 7,355
6,831
 6,350
 6,625
Cost of natural gas632
 265
 141
697
 632
 265
Operation, maintenance and other5,788
 6,085
 5,539
6,463
 5,944
 6,224
Depreciation and amortization3,527
 3,294
 3,053
4,074
 3,527
 3,294
Property and other taxes1,233
 1,142
 1,129
1,280
 1,233
 1,142
Impairment charges282
 18
 106
402
 282
 18
Total operating expenses17,812
 17,429
 17,323
19,747
 17,968
 17,568
Gains on Sales of Other Assets and Other, net28
 27
 30
(Losses) Gains on Sales of Other Assets and Other, net(89) 28
 27
Operating Income5,781
 5,341
 5,078
4,685
 5,625
 5,202
Other Income and Expenses          
Equity in earnings (losses) of unconsolidated affiliates119
 (15) 69
83
 119
 (15)
Other income and expenses, net352
 324
 290
399
 508
 463
Total other income and expenses471
 309
 359
482
 627
 448
Interest Expense1,986
 1,916
 1,527
2,094
 1,986
 1,916
Income From Continuing Operations Before Income Taxes4,266
 3,734
 3,910
3,073
 4,266
 3,734
Income Tax Expense From Continuing Operations1,196
 1,156
 1,256
448
 1,196
 1,156
Income From Continuing Operations3,070
 2,578
 2,654
2,625
 3,070
 2,578
(Loss) Income From Discontinued Operations, net of tax(6) (408) 177
Income (Loss) From Discontinued Operations, net of tax19
 (6) (408)
Net Income3,064
 2,170
 2,831
2,644
 3,064
 2,170
Less: Net Income Attributable to Noncontrolling Interests5
 18
 15
Less: Net (Loss) Income Attributable to Noncontrolling Interests(22) 5
 18
Net Income Attributable to Duke Energy Corporation$3,059
 $2,152
 $2,816
$2,666
 $3,059
 $2,152
          
Earnings Per Share Basic and Diluted
          
Income from continuing operations attributable to Duke Energy Corporation common stockholders          
Basic$4.37
 $3.71
 $3.80
$3.73
 $4.37
 $3.71
Diluted$4.37
 $3.71
 $3.80
$3.73
 $4.37
 $3.71
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders
    
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders
    
Basic$(0.01) $(0.60) $0.25
$0.03
 $(0.01) $(0.60)
Diluted$(0.01) $(0.60) $0.25
$0.03
 $(0.01) $(0.60)
Net income attributable to Duke Energy Corporation common stockholders
    
    
Basic$4.36
 $3.11
 $4.05
$3.76
 $4.36
 $3.11
Diluted$4.36
 $3.11
 $4.05
$3.76
 $4.36
 $3.11
Weighted average shares outstanding          
Basic700
 691
 694
708
 700
 691
Diluted700
 691
 694
708
 700
 691
See Notes to Consolidated Financial Statements



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FINANCIAL STATEMENTS

PART II

DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Years Ended December 31,Years Ended December 31,
(in millions)
2017
 2016
 2015
2018
 2017
 2016
Net Income$3,064
 $2,170
 $2,831
$2,644
 $3,064
 $2,170
Other Comprehensive Income (Loss), net of tax     
Other Comprehensive (Loss) Income, net of tax     
Foreign currency translation adjustments
 694
 (264)
 
 694
Pension and OPEB adjustments3
 (11) (13)(6) 3
 (11)
Net unrealized gains on cash flow hedges2
 17
 
Net unrealized (losses) gains on cash flow hedges(10) 2
 17
Reclassification into earnings from cash flow hedges8
 13
 9
6
 8
 13
Unrealized gains (losses) on available-for-sale securities13
 2
 (6)
Other Comprehensive Income (Loss), net of tax
26
 715
 (274)
Unrealized (losses) gains on available-for-sale securities(3) 13
 2
Other Comprehensive (Loss) Income, net of tax
(13) 26
 715
Comprehensive Income
3,090
 2,885
 2,557
2,631
 3,090
 2,885
Less: Comprehensive Income Attributable to Noncontrolling Interests
5
 20
 4
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests
(22) 5
 20
Comprehensive Income Attributable to Duke Energy Corporation
$3,085
 $2,865
 $2,553
$2,653
 $3,085
 $2,865

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS

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PART II

DUKE ENERGY CORPORATION
CONSOLIDATED BALANCE SHEETS
December 31,December 31,
(in millions)2017
 2016
2018
 2017
ASSETS      
Current Assets      
Cash and cash equivalents$358
 $392
$442
 $358
Receivables (net of allowance for doubtful accounts of $14 at 2017 and 2016)779
 751
Receivables of VIEs (net of allowance for doubtful accounts of $54 at 2017 and 2016)1,995
 1,893
Receivables (net of allowance for doubtful accounts of $16 at 2018 and $14 at 2017)962
 779
Receivables of VIEs (net of allowance for doubtful accounts of $55 at 2018 and $54 at 2017)2,172
 1,995
Inventory3,250

3,522
3,084

3,250
Regulatory assets (includes $51 at 2017 and $50 at 2016 related to VIEs)1,437
 1,023
Other634
 458
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)2,005
 1,437
Other (includes $162 at 2018 and $214 at 2017 related to VIEs)1,049
 634
Total current assets8,453
 8,039
9,714
 8,453
Property, Plant and Equipment      
Cost127,507
 121,397
134,458
 127,507
Accumulated depreciation and amortization(41,537) (39,406)(43,126) (41,537)
Generation facilities to be retired, net421
 529
362
 421
Net property, plant and equipment86,391
 82,520
91,694
 86,391
Other Noncurrent Assets      
Goodwill19,396
 19,425
19,303
 19,396
Regulatory assets (includes $1,091 at 2017 and $1,142 at 2016 related to VIEs)12,442
 12,878
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)13,617
 12,442
Nuclear decommissioning trust funds7,097
 6,205
6,720
 7,097
Investments in equity method unconsolidated affiliates1,175
 925
1,409
 1,175
Other2,960
 2,769
2,935
 2,960
Total other noncurrent assets43,070
 42,202
43,984
 43,070
Total Assets$137,914
 $132,761
$145,392
 $137,914
LIABILITIES AND EQUITY      
Current Liabilities      
Accounts payable$3,043
 $2,994
$3,487
 $3,043
Notes payable and commercial paper2,163
 2,487
3,410
 2,163
Taxes accrued551
 384
577
 551
Interest accrued525
 503
559
 525
Current maturities of long-term debt (includes $225 at 2017 and $260 at 2016 related to VIEs)3,244
 2,319
Current maturities of long-term debt (includes $227 at 2018 and $225 at 2017 related to VIEs)3,406
 3,244
Asset retirement obligations689
 411
919
 689
Regulatory liabilities402
 409
598
 402
Other1,865
 2,044
2,085
 1,865
Total current liabilities12,482
 11,551
15,041
 12,482
Long-Term Debt (includes $4,306 at 2017 and $3,587 at 2016 related to VIEs)49,035
 45,576
Long-Term Debt (includes $3,998 at 2018 and $4,306 at 2017 related to VIEs)51,123
 49,035
Other Noncurrent Liabilities      
Deferred income taxes6,621
 14,155
7,806
 6,621
Asset retirement obligations9,486
 10,200
9,548
 9,486
Regulatory liabilities15,330
 6,881
14,834
 15,330
Accrued pension and other post-retirement benefit costs1,103
 1,111
988
 1,103
Investment tax credits539
 493
568
 539
Other1,581
 1,753
Other (includes $212 at 2018 and $241 at 2017 related to VIEs)1,650
 1,581
Total other noncurrent liabilities34,660
 34,593
35,394
 34,660
Commitments and Contingencies

 

   
Equity      
Common stock, $0.001 par value, 2 billion shares authorized; 700 million shares outstanding at 2017 and 20161
 1
Common stock, $0.001 par value, 2 billion shares authorized; 727 million shares outstanding at 2018 and 700 million shares outstanding at 20171
 1
Additional paid-in capital38,792
 38,741
40,795
 38,792
Retained earnings3,013
 2,384
3,113
 3,013
Accumulated other comprehensive loss(67) (93)(92) (67)
Total Duke Energy Corporation stockholders' equity41,739
 41,033
43,817
 41,739
Noncontrolling interests(2) 8
17
 (2)
Total equity41,737
 41,041
43,834
 41,737
Total Liabilities and Equity$137,914
 $132,761
$145,392
 $137,914

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS

90


PART II

DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES          
Net income$3,064
 $2,170
 $2,831
$2,644
 $3,064
 $2,170
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation, amortization and accretion (including amortization of nuclear fuel)4,046
 3,880
 3,613
4,696
 4,046
 3,880
Equity component of AFUDC(237) (200) (164)(221) (237) (200)
(Gains) Losses on sales of other assets(33) 477
 (48)
Losses (Gains) on sales of other assets88
 (33) 477
Impairment charges282
 212
 153
402
 282
 212
Deferred income taxes1,433
 900
 1,244
1,079
 1,433
 900
Equity in (earnings) losses of unconsolidated affiliates(119) 15
 (69)(83) (119) 15
Accrued pension and other post-retirement benefit costs8
 21
 71
61
 8
 21
Contributions to qualified pension plans(19) (155) (302)(141) (19) (155)
Payments for asset retirement obligations(571) (608) (346)(533) (571) (608)
Payment for the disposal of other assets(105) 
 
Other rate case adjustments37
 
 
Provision for rate refunds425
 
 
(Increase) decrease in          
Net realized and unrealized mark-to-market and hedging transactions18
 34
 (29)22
 18
 34
Receivables(83) (372) 383
(345) (83) (372)
Inventory268
 272
 (237)156
 268
 272
Other current assets(388) (220) (65)(721) (400) (174)
Increase (decrease) in          
Accounts payable(204) 296
 (6)479
 (204) 296
Taxes accrued149
 236
 (38)23
 149
 236
Other current liabilities(482) 182
 168
270
 (482) 182
Other assets(438) (186) (216)(1,008) (436) (186)
Other liabilities(60) (137) (243)(39) (60) (137)
Net cash provided by operating activities6,634

6,817

6,700
7,186

6,624

6,863
CASH FLOWS FROM INVESTING ACTIVITIES          
Capital expenditures(8,052) (7,901) (6,766)(9,389) (8,052) (7,901)
Contributions to equity method investments(414) (307) (263)(416) (414) (307)
Acquisitions, net of cash acquired(13) (4,778) (1,334)
 (13) (4,778)
Return of investment capital281
 1
 3
137
 281
 1
Purchases of available-for-sale securities(4,071) (5,153) (4,037)
Proceeds from sales and maturities of available-for-sale securities4,098
 5,236
 4,040
Purchases of debt and equity securities(3,762) (4,071) (5,153)
Proceeds from sales and maturities of debt and equity securities3,747
 4,098
 5,236
Proceeds from the sales of discontinued operations and other assets, net of cash divested
 1,418
 2,968
41
 
 1,418
Change in restricted cash(10) (4) 191
Other(269) (45) (79)(418) (271) (44)
Net cash used in investing activities(8,450)
(11,533)
(5,277)(10,060)
(8,442)
(11,528)
CASH FLOWS FROM FINANCING ACTIVITIES          
Proceeds from the:          
Issuance of long-term debt6,909
 9,238
 2,955
5,299
 6,909
 9,238
Issuance of common stock
 731
 17
1,838
 
 731
Payments for the redemption of long-term debt(2,316) (1,923) (3,029)(2,906) (2,316) (1,923)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days319
 2,081
 379
472
 319
 2,081
Payments for the redemption of short-term debt with original maturities greater than 90 days(272) (2,166) (931)(282) (272) (2,166)
Notes payable and commercial paper(409) (1,362) 1,797
981
 (409) (1,362)
Dividends paid(2,450) (2,332) (2,254)(2,471) (2,450) (2,332)
Repurchase of common shares
 
 (1,500)
Other1
 (16) (36)29
 1
 (16)
Net cash provided by (used in) financing activities1,782

4,251

(2,602)
Net cash provided by financing activities2,960

1,782

4,251
Changes in cash and cash equivalents included in assets held for sale
 474
 1,099

 
 474
Net (decrease) increase in cash and cash equivalents(34)
9

(80)
Cash and cash equivalents at beginning of period392
 383
 463
Cash and cash equivalents at end of period$358

$392

$383
Net increase (decrease) in cash, cash equivalents, and restricted cash86

(36)
60
Cash, cash equivalents, and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents, and restricted cash at end of period$591

$505

$541
Supplemental Disclosures:          
Cash paid for interest, net of amount capitalized$1,963
 $1,794
 $1,607
$2,086
 $1,963
 $1,794
Cash paid for income taxes4
 229
 170
Cash (received from) paid for income taxes(266) 4
 229
Significant non-cash transactions:          
Accrued capital expenditures1,032
 1,000
 771
1,112
 1,032
 1,000
Non-cash dividends107
 
 
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS

91


PART II

DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
        
Duke Energy Corporation Stockholders'
Accumulated Other Comprehensive Loss
              
Duke Energy Corporation Stockholders'
Accumulated Other Comprehensive Loss
      
            Net Unrealized
   Total
                Net Unrealized
   Total
    
        Foreign
 Net
 Gains (Losses)
   Duke Energy
            Foreign
 Net
 Gains (Losses)
   Duke Energy
    
Common
   Additional
   Currency
 Losses on
 on Available-
 Pension and
 Corporation
    Common
   Additional
   Currency
 Losses on
 on Available-
 Pension and
 Corporation
    
Stock
 Common
 Paid-in
 Retained
 Translation
 Cash Flow
 for-Sale-
 OPEB
 Stockholders'
 Noncontrolling
 Total
Stock
 Common
 Paid-in
 Retained
 Translation
 Cash Flow
 for-Sale-
 OPEB
 Stockholders'
 Noncontrolling
 Total
(in millions)Shares
 Stock
 Capital
 Earnings
 Adjustments
 Hedges
 Securities
 Adjustments
 Equity
 Interests
 Equity
Shares
 Stock
 Capital
 Earnings
 Adjustments
 Hedges
 Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2014707
 $1
 $39,405
 $2,012
 $(439) $(59) $3
 $(48) $40,875
 $24
 $40,899
Balance at December 31, 2015688
 $1
 $37,968
 $2,564
 $(692) $(50) $(3) $(61) $39,727
 $44
 $39,771
Net income
 
 
 2,816
 
 
 
 
 2,816
 15
 2,831

 
 
 2,152
 
 
 
 
 2,152
 18
 2,170
Other comprehensive (loss) income
 
 
 
 (253) 9
 (6) (13) (263) (11) (274)
Other comprehensive income (loss)(a)

 
 
 
 692
 30
 2
 (11) 713
 2
 715
Common stock issuances, including dividend reinvestment and employee benefits1
 
 63
 
 
 
 
 
 63
 
 63
12
 
 773
 
 
 
 
 
 773
 
 773
Stock repurchase(20) 
 (1,500) 
 
 
 
 
 (1,500) 
 (1,500)
Common stock dividends
 
 
 (2,254) 
 
 
 
 (2,254) 
 (2,254)
 
 
 (2,332) 
 
 
 
 (2,332) 
 (2,332)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (9) (9)
 
 
 
 
 
 
 
 
 (6) (6)
Other(a)

 
 
 (10) 
 
 
 
 (10) 25
 15
Balance at December 31, 2015688

$1

$37,968

$2,564

$(692)
$(50)
$(3)
$(61)
$39,727

$44

$39,771
Other(b)

 
 
 
 
 
 
 
 
 (50) (50)
Balance at December 31, 2016700

$1

$38,741

$2,384

$

$(20)
$(1)
$(72)
$41,033

$8

$41,041
Net income
 
 
 2,152
 
 
 
 
 2,152
 18
 2,170

 
 
 3,059
 
 
 
 
 3,059
 5
 3,064
Other comprehensive (loss) income(b)

 
 
 
 692
 30
 2
 (11) 713
 2
 715
Other comprehensive income
 
 
 
 
 10
 13
 3
 26
 
 26
Common stock issuances, including dividend reinvestment and employee benefits12
 
 773
 
 
 
 
 
 773
 
 773

 
 51
 
 
 
 
 
 51
 
 51
Common stock dividends
 
 
 (2,332) 
 
 
 
 (2,332) 
 (2,332)
 
 
 (2,450) 
 
 
 
 (2,450) 
 (2,450)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (6) (6)
 
 
 
 
 
 
 
 
 (2) (2)
Other(c)

 
 
 
 
 
 
 
 
 (50) (50)
 
 
 20
 
 
 
 
 20
 (13) 7
Balance at December 31, 2016700

$1

$38,741

$2,384

$

$(20)
$(1)
$(72)
$41,033

$8

$41,041
Balance at December 31, 2017700

$1

$38,792

$3,013

$

$(10)
$12

$(69)
$41,739

$(2)
$41,737
Net income
 
 
 3,059
 
 
 
 
 3,059
 5
 3,064

 
 
 2,666
 
 
 
 
 2,666
 (22) 2,644
Other comprehensive income (loss)
 
 
 
 
 10
 13
 3
 26
 
 26
Other comprehensive (loss) income
 
 
 
 
 (4) (3) (6) (13) 
 (13)
Common stock issuances, including dividend reinvestment and employee benefits
 
 51
 
 
 
 
 
 51
 
 51
27
 
 2,003
 
 
 
 
 
 2,003
 
 2,003
Common stock dividends
 
 
 (2,450) 
 
 
 
 (2,450) 
 (2,450)
 
 
 (2,578) 
 
 
 
 (2,578) 
 (2,578)
Distributions to noncontrolling interests in subsidiaries
 
 
 
 
 
 
 
 
 (2) (2)
 
 
 
 
 
 
 
 
 (1) (1)
Other(d)

 
 
 20
 
 
 
 
 20
 (13) 7

 
 
 12
 
 
 (12) 
 
 42
 42
Balance at December 31, 2017700
 $1
 $38,792
 $3,013
 $
 $(10) $12
 $(69) $41,739
 $(2) $41,737
Balance at December 31, 2018727
 $1
 $40,795
 $3,113
 $
 $(14) $(3) $(75) $43,817
 $17
 $43,834
(a)Noncontrolling Interests amount is primarily related to the acquisitions of a majority interest in a provider of energy management systems and services for commercial customers and a solar company.
(b)Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(c)(b)Noncontrolling Interests amount is primarily related to the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(d)(c)Retained Earnings relates to a cumulative-effect adjustment due to implementation of a new accounting standard related to stock-based compensation and the associated income taxes. See Note 1 to the Consolidated Financial Statements for additional information. Noncontrolling Interests relates to the purchase of remaining interest in REC Solar.
(d)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information. Amount in Noncontrolling Interests primarily relates to tax equity financing activity in the Commercial Renewables segment.
See Notes to Consolidated Financial Statements



92

REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Carolinas, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Carolinas, LLC and subsidiaries (the "Company") as of December 31, 20172018 and 2016,2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2017,2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20172018 and 2016,2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017,2018, in conformity with the accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019
We have served as the Company's auditor since 1947.




93

FINANCIAL STATEMENTS

PART II

DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Operating Revenues$7,302
 $7,322
 $7,229
$7,300
 $7,302
 $7,322
Operating Expenses          
Fuel used in electric generation and purchased power1,822

1,797
 1,881
1,821

1,822
 1,797
Operation, maintenance and other1,961

2,106
 2,066
2,130

2,021
 2,158
Depreciation and amortization1,090

1,075
 1,051
1,201

1,090
 1,075
Property and other taxes281

276
 269
295

281
 276
Impairment charges

1
 1
192


 1
Total operating expenses5,154
 5,255
 5,268
5,639
 5,214
 5,307
Gain (Loss) on Sales of Other Assets and Other, net1
 (5) (1)
(Losses) Gains on Sales of Other Assets and Other, net(1) 1
 (5)
Operating Income2,149
 2,062
 1,960
1,660
 2,089
 2,010
Other Income and Expenses, net139
 162
 160
153
 199
 214
Interest Expense422
 424
 412
439
 422
 424
Income Before Income Taxes1,866
 1,800
 1,708
1,374
 1,866
 1,800
Income Tax Expense652
 634
 627
303
 652
 634
Net Income$1,214
 $1,166
 $1,081
$1,071
 $1,214
 $1,166
Other Comprehensive Income, net of tax          
Reclassification into earnings from cash flow hedges2
 2
 1
1
 2
 2
Unrealized gains on available-for-sale securities
 
 1
Other Comprehensive Income, net of tax2
 2
 2
1
 2
 2
Comprehensive Income$1,216
 $1,168
 $1,083
$1,072
 $1,216
 $1,168
See Notes to Consolidated Financial Statements



94

FINANCIAL STATEMENTS

PART II

DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED BALANCE SHEETS
 December 31, December 31,
(in millions) 2017
 2016
 2018
 2017
ASSETS        
Current Assets        
Cash and cash equivalents $16
 $14
 $33
 $16
Receivables (net of allowance for doubtful accounts of $2 at 2017 and 2016) 200
 160
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2017 and 2016) 640
 645
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017) 219
 200
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2018 and 2017) 699
 640
Receivables from affiliated companies 95
 163
 182
 95
Notes receivable from affiliated companies 
 66
Inventory 971

1,055
 948

971
Regulatory assets 299
 238
 520
 299
Other 19
 37
 72
 19
Total current assets 2,240
 2,378
 2,673
 2,240
Property, Plant and Equipment        
Cost 42,939
 41,127
 44,741
 42,939
Accumulated depreciation and amortization (15,063) (14,365) (15,496) (15,063)
Net property, plant and equipment 27,876
 26,762
 29,245
 27,876
Other Noncurrent Assets        
Regulatory assets 2,853
 3,159
 3,457
 2,853
Nuclear decommissioning trust funds 3,772
 3,273
 3,558
 3,772
Other 979
 943
 1,027
 979
Total other noncurrent assets 7,604
 7,375
 8,042
 7,604
Total Assets $37,720
 $36,515
 $39,960
 $37,720
LIABILITIES AND EQUITY        
Current Liabilities        
Accounts payable $842
 $833
 $988
 $842
Accounts payable to affiliated companies 209
 247
 230
 209
Notes payable to affiliated companies 104
 
 439
 104
Taxes accrued 234
 143
 171
 234
Interest accrued 108
 102
 102
 108
Current maturities of long-term debt 1,205
 116
 6
 1,205
Asset retirement obligations 337
 222
 290
 337
Regulatory liabilities 126
 161
 199
 126
Other 486
 468
 571
 486
Total current liabilities 3,651
 2,292
 2,996
 3,651
Long-Term Debt 8,598
 9,187
 10,633
 8,598
Long-Term Debt Payable to Affiliated Companies 300
 300
 300
 300
Other Noncurrent Liabilities        
Deferred income taxes 3,413
 6,544
 3,689
 3,413
Asset retirement obligations 3,273
 3,673
 3,659
 3,273
Regulatory liabilities 6,231
 2,840
 5,999
 6,231
Accrued pension and other post-retirement benefit costs 95
 97
 99
 95
Investment tax credits 232
 203
 231
 232
Other 566
 607
 671
 566
Total other noncurrent liabilities 13,810
 13,964
 14,348
 13,810
Commitments and Contingencies 
 
 
 
Equity        
Member's equity 11,368
 10,781
 11,689
 11,368
Accumulated other comprehensive loss (7) (9) (6) (7)
Total equity 11,361
 10,772
 11,683
 11,361
Total Liabilities and Equity $37,720
 $36,515
 $39,960
 $37,720
See Notes to Consolidated Financial Statements



95

FINANCIAL STATEMENTS

PART II

DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES          
Net income$1,214
 $1,166
 $1,081
$1,071
 $1,214
 $1,166
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation and amortization (including amortization of nuclear fuel)1,409
 1,382
 1,361
1,487
 1,409
 1,382
Equity component of AFUDC(106) (102) (96)(73) (106) (102)
(Gains) Losses on sales of other assets(1) 5
 1
Losses (Gains) on sales of other assets1
 (1) 5
Impairment charges
 1
 1
192
 
 1
Deferred income taxes410
 470
 397
305
 410
 470
Accrued pension and other post-retirement benefit costs(4) 4
 15
4
 (4) 4
Contributions to qualified pension plans
 (43) (91)(46) 
 (43)
Payments for asset retirement obligations(271) (287) (167)(230) (271) (287)
Provision for rate refunds182
 
 
(Increase) decrease in
    
    
Net realized and unrealized mark-to-market and hedging transactions9
 5
 
2
 9
 5
Receivables(9) (76) 42
(86) (9) (76)
Receivables from affiliated companies68
 (56) (32)(87) 68
 (56)
Inventory78
 215
 (157)25
 78
 215
Other current assets7
 67
 (51)(161) 7
 67
Increase (decrease) in
    
    
Accounts payable23
 (69) (4)168
 23
 (69)
Accounts payable to affiliated companies(38) 18
 75
21
 (38) 18
Taxes accrued86
 187
 (128)(65) 86
 187
Other current liabilities(161) 63
 127
89
 (161) 63
Other assets(49) 20
 76
(179) (49) 20
Other liabilities(31) 6
 (77)(90) (31) 6
Net cash provided by operating activities2,634
 2,976
 2,373
2,530
 2,634
 2,976
CASH FLOWS FROM INVESTING ACTIVITIES
    
    
Capital expenditures(2,524) (2,220) (1,933)(2,706) (2,524) (2,220)
Purchases of available-for-sale securities(2,124) (2,832) (2,555)
Proceeds from sales and maturities of available-for-sale securities2,128
 2,832
 2,555
Purchases of debt and equity securities(1,810) (2,124) (2,832)
Proceeds from sales and maturities of debt and equity securities1,810
 2,128
 2,832
Notes receivable from affiliated companies66
 97
 (13)
 66
 97
Other(109) (83) (35)(147) (109) (83)
Net cash used in investing activities(2,563) (2,206) (1,981)(2,853) (2,563) (2,206)
CASH FLOWS FROM FINANCING ACTIVITIES          
Proceeds from the issuance of long-term debt569
 1,587
 516
1,983
 569
 1,587
Payments for the redemption of long-term debt(116) (356) (506)(1,205) (116) (356)
Notes payable to affiliated companies104
 
 
335
 104
 
Distributions to parent(625) (2,000) (401)(750) (625) (2,000)
Other(1) 
 (1)(23) (1) 
Net cash used in financing activities(69) (769) (392)
Net cash provided by (used in) financing activities340
 (69) (769)
Net increase in cash and cash equivalents2
 1
 
17
 2
 1
Cash and cash equivalents at beginning of period14
 13
 13
16
 14
 13
Cash and cash equivalents at end of period$16
 $14
 $13
$33
 $16
 $14
Supplemental Disclosures:          
Cash paid for interest, net of amount capitalized$398
 $393
 $389
$452
 $398
 $393
Cash paid for (received from) income taxes193
 (60) 342
89
 193
 (60)
Significant non-cash transactions:          
Accrued capital expenditures315
 347
 239
302
 315
 347
See Notes to Consolidated Financial Statements



96

FINANCIAL STATEMENTS

PART II

DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
  Accumulated Other  
  Accumulated Other    Comprehensive  
  Comprehensive Loss    Loss  
  Net Losses
 Net Losses
    Net Losses
  
  on Cash
 Available-
    on Cash
  
Member's
 Flow
 for-Sale
 Total
Member's
 Flow
 Total
(in millions)Equity
 Hedges
 Securities
 Equity
Equity
 Hedges
 Equity
Balance at December 31, 2014$10,937
 $(12) $(1) $10,924
Net income1,081
 
 
 1,081
Other comprehensive income
 1
 1
 2
Distributions to parent(401) 
 
 (401)
Balance at December 31, 2015$11,617
 $(11) $
 $11,606
$11,617
 $(11) $11,606
Net income1,166
 
 
 1,166
1,166
 
 1,166
Other comprehensive income
 2
 
 2

 2
 2
Distributions to parent(2,000) 
 
 (2,000)(2,000) 
 (2,000)
Other(2) 
 
 (2)(2) 
 (2)
Balance at December 31, 2016$10,781
 $(9) $
 $10,772
$10,781
 $(9) $10,772
Net income
1,214
 
 
 1,214
1,214
 
 1,214
Other comprehensive income

 2
 
 2

 2
 2
Distributions to parent
(625) 
 
 (625)(625) 
 (625)
Other(2) 
 
 (2)(2) 
 (2)
Balance at December 31, 2017$11,368
 $(7) $
 $11,361
$11,368
 $(7) $11,361
Net income
1,071
 
 1,071
Other comprehensive income

 1
 1
Distributions to parent
(750) 
 (750)
Balance at December 31, 2018$11,689
 $(6) $11,683
See Notes to Consolidated Financial Statements



97

REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Progress Energy, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Progress Energy, Inc. and subsidiaries (the "Company") as of December 31, 20172018 and 2016,2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2017,2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20172018 and 2016,2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017,2018, in conformity with the accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019
We have served as the Company's auditor since 1930.




98

FINANCIAL STATEMENTS

PART II

PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Operating Revenues$9,783
 $9,853
 $10,277
$10,728
 $9,783
 $9,853
Operating Expenses          
Fuel used in electric generation and purchased power3,417
 3,644
 4,224
3,976
 3,417
 3,644
Operation, maintenance and other2,220
 2,386
 2,298
2,613
 2,301
 2,458
Depreciation and amortization1,285
 1,213
 1,116
1,619
 1,285
 1,213
Property and other taxes503
 487
 492
529
 503
 487
Impairment charges156
 7
 12
87
 156
 7
Total operating expenses7,581

7,737

8,142
8,824

7,662

7,809
Gains on Sales of Other Assets and Other, net26
 25
 25
24
 26
 25
Operating Income2,228

2,141

2,160
1,928

2,147

2,069
Other Income and Expenses, net128
 114
 97
165
 209
 186
Interest Expense824
 689
 670
842
 824
 689
Income From Continuing Operations Before Income Taxes1,532

1,566

1,587
1,251

1,532

1,566
Income Tax Expense From Continuing Operations264
 527
 522
218
 264
 527
Income From Continuing Operations1,268

1,039

1,065
1,033

1,268

1,039
Income (Loss) From Discontinued Operations, net of tax
 2
 (3)
Income From Discontinued Operations, net of tax
 
 2
Net Income1,268

1,041

1,062
1,033

1,268

1,041
Less: Net Income Attributable to Noncontrolling Interests10
 10
 11
6
 10
 10
Net Income Attributable to Parent$1,258

$1,031

$1,051
$1,027

$1,258

$1,031
          
Net Income
$1,268

$1,041

$1,062
$1,033

$1,268

$1,041
Other Comprehensive Income (Loss), net of tax
     
Other Comprehensive Income, net of tax
     
Pension and OPEB adjustments4
 1
 (10)5
 4
 1
Net unrealized gain on cash flow hedges5
 
 
6
 5
 
Reclassification into earnings from cash flow hedges
 8
 4

 
 8
Unrealized gains (losses) on available-for-sale securities4
 1
 (1)
Other Comprehensive Income (Loss), net of tax
13

10

(7)
Unrealized (losses) gains on available-for-sale securities(1) 4
 1
Other Comprehensive Income, net of tax
10

13

10
Comprehensive Income
1,281

1,051

1,055
1,043

1,281

1,051
Less: Comprehensive Income Attributable to Noncontrolling Interests10
 10
 11
6
 10
 10
Comprehensive Income Attributable to Parent$1,271

$1,041

$1,044
$1,037

$1,271

$1,041

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS

99


PART II

PROGRESS ENERGY, INC.
CONSOLIDATED BALANCE SHEETS
December 31,December 31,
(in millions)2017
 2016
2018
 2017
ASSETS      
Current Assets      
Cash and cash equivalents$40
 $46
$67
 $40
Receivables (net of allowance for doubtful accounts of $4 at 2017 and $6 at 2016)123
 114
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2017 and 2016)780
 692
Receivables (net of allowance for doubtful accounts of $5 at 2018 and $4 at 2017)220
 123
Receivables of VIEs (net of allowance for doubtful accounts of $8 at 2018 and $7 at 2017)909
 780
Receivables from affiliated companies31
 106
168
 31
Notes receivable from affiliated companies240
 80

 240
Inventory1,592

1,717
1,459

1,592
Regulatory assets (includes $51 at 2017 and $50 at 2016 related to VIEs)741
 401
Other334
 148
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)1,137
 741
Other (includes $39 at 2018 and $44 at 2017 related to VIEs)125
 334
Total current assets3,881
 3,304
4,085
 3,881
Property, Plant and Equipment      
Cost47,323
 44,864
50,260
 47,323
Accumulated depreciation and amortization(15,857) (15,212)(16,398) (15,857)
Generation facilities to be retired, net421
 529
362
 421
Net property, plant and equipment31,887
 30,181
34,224
 31,887
Other Noncurrent Assets      
Goodwill3,655
 3,655
3,655
 3,655
Regulatory assets (includes $1,091 at 2017 and $1,142 at 2016 related to VIEs)6,010
 5,722
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)6,564
 6,010
Nuclear decommissioning trust funds3,324
 2,932
3,162
 3,324
Other931
 856
974
 931
Total other noncurrent assets13,920
 13,165
14,355
 13,920
Total Assets$49,688
 $46,650
$52,664
 $49,688
LIABILITIES AND EQUITY      
Current Liabilities      
Accounts payable$1,006
 $1,003
$1,172
 $1,006
Accounts payable to affiliated companies251
 348
360
 251
Notes payable to affiliated companies805
 729
1,235
 805
Taxes accrued101
 83
109
 101
Interest accrued212
 201
246
 212
Current maturities of long-term debt (includes $53 at 2017 and $62 at 2016 related to VIEs)771
 778
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)1,672
 771
Asset retirement obligations295
 189
514
 295
Regulatory liabilities213
 189
280
 213
Other729
 745
821
 729
Total current liabilities4,383
 4,265
6,409
 4,383
Long-Term Debt (includes $1,689 at 2017 and $1,741 at 2016 related to VIEs)16,916
 15,590
Long-Term Debt (includes $1,636 at 2018 and $1,689 at 2017 related to VIEs)17,089
 16,916
Long-Term Debt Payable to Affiliated Companies150
 1,173
150
 150
Other Noncurrent Liabilities      
Deferred income taxes3,502
 5,246
3,941
 3,502
Asset retirement obligations5,119
 5,286
4,897
 5,119
Regulatory liabilities5,306
 2,395
5,049
 5,306
Accrued pension and other post-retirement benefit costs545
 547
521
 545
Other302
 341
351
 302
Total other noncurrent liabilities14,774
 13,815
14,759
 14,774
Commitments and Contingencies
 

 
Equity      
Common stock, $0.01 par value, 100 shares authorized and outstanding at 2017 and 2016
 
Common stock, $0.01 par value, 100 shares authorized and outstanding at 2018 and 2017
 
Additional paid-in capital9,143
 8,094
9,143
 9,143
Retained earnings4,350
 3,764
5,131
 4,350
Accumulated other comprehensive loss(25) (38)(20) (25)
Total Progress Energy, Inc. stockholder's equity13,468
 11,820
14,254
 13,468
Noncontrolling interests(3) (13)3
 (3)
Total equity13,465
 11,807
14,257
 13,465
Total Liabilities and Equity$49,688

$46,650
$52,664

$49,688
See Notes to Consolidated Financial Statements



100

FINANCIAL STATEMENTS

PART II

PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES          
Net income$1,268
 $1,041
 $1,062
$1,033
 $1,268
 $1,041
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation, amortization and accretion (including amortization of nuclear fuel)1,516
 1,435
 1,312
1,987
 1,516
 1,435
Equity component of AFUDC(92) (76) (54)(104) (92) (76)
Gains on sales of other assets(28) (34) (31)(24) (28) (34)
Impairment charges156
 7
 12
87
 156
 7
Deferred income taxes703
 532
 714
358
 703
 532
Accrued pension and other post-retirement benefit costs(28) (24) (5)24
 (28) (24)
Contributions to qualified pension plans
 (43) (83)(45) 
 (43)
Payments for asset retirement obligations(248) (270) (156)(230) (248) (270)
Other rate case adjustments37
 
 
Provision for rate refunds122
 
 
(Increase) decrease in          
Net realized and unrealized mark-to-market and hedging transactions
 42
 (6)18
 
 42
Receivables(89) 7
 105
(207) (89) 7
Receivables from affiliated companies71
 211
 (316)(137) 71
 211
Inventory125
 35
 (67)121
 125
 35
Other current assets(384) 3
 553
(12) (397) 50
Increase (decrease) in          
Accounts payable(260) 252
 (193)217
 (260) 252
Accounts payable to affiliated companies(97) 37
 108
109
 (97) 37
Taxes accrued17
 15
 (63)8
 17
 15
Other current liabilities(166) (42) 136
129
 (166) (42)
Other assets(301) (248) (167)(913) (300) (248)
Other liabilities(98) (36) (112)(34) (98) (36)
Net cash provided by operating activities2,065

2,844

2,749
2,544

2,053

2,891
CASH FLOWS FROM INVESTING ACTIVITIES          
Capital expenditures(3,152) (3,306) (2,698)(3,854) (3,152) (3,306)
Asset Acquisitions
 (10) (1,249)
 
 (10)
Purchases of available-for-sale securities(1,806) (2,143) (1,174)
Proceeds from sales and maturities of available-for-sale securities1,824
 2,187
 1,211
Purchases of debt and equity securities(1,753) (1,806) (2,143)
Proceeds from sales and maturities of debt and equity securities1,769
 1,824
 2,187
Net proceeds from sales of other assets20
 
 
Proceeds from insurance7
 58
 

 7
 58
Proceeds from the sale of nuclear fuel20
 20
 102

 20
 20
Notes receivable from affiliated companies(160) (80) 220
240
 (160) (80)
Change in restricted cash5
 (6) 
Other(86) 47
 (34)(182) (86) 47
Net cash used in investing activities(3,348) (3,233) (3,622)(3,760) (3,353) (3,227)
CASH FLOWS FROM FINANCING ACTIVITIES          
Proceeds from the issuance of long-term debt2,118
 2,375
 1,186
1,833
 2,118
 2,375
Payments for the redemption of long-term debt(813) (327) (1,553)(771) (813) (327)
Notes payable to affiliated companies100
 444
 623
430
 100
 444
Capital contribution from parent
 
 625
Dividends to parent(124) (2,098) 
(250) (124) (2,098)
Other(4) (3) (6)(1) (4) (3)
Net cash provided by financing activities1,277

391

875
1,241

1,277

391
Net (decrease) increase in cash and cash equivalents(6)
2

2
Cash and cash equivalents at beginning of period46
 44
 42
Cash and cash equivalents at end of period$40
 $46
 $44
Net increase (decrease) in cash, cash equivalents, and restricted cash25

(23)
55
Cash, cash equivalents, and restricted cash at beginning of period87
 110
 55
Cash, cash equivalents, and restricted cash at end of period$112
 $87
 $110
Supplemental Disclosures:          
Cash paid for interest, net of amount capitalized$773
 $673
 $649
$798
 $773
 $673
Cash (received from) paid for income taxes(146) (187) (426)
Cash received from income taxes(348) (146) (187)
Significant non-cash transactions:          
Accrued capital expenditures391
 317
 329
478
 391
 317
Equitization of certain notes payable to affiliates1,047
 
 

 1,047
 
Dividend to parent related to a legal entity restructuring547
 
 

 547
 
See Notes to Consolidated Financial Statements



101

FINANCIAL STATEMENTS

PART II

PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
 
  
 Accumulated Other Comprehensive Loss  
  
  
 
  
 Accumulated Other Comprehensive Loss  
  
  
    Net
 Net Unrealized
   Total Progress
        Net
 Net Unrealized
   Total Progress
    
Additional
   Losses on
 Gains on
 Pension and
 Energy, Inc.
    Additional
   Losses on
 Gains (Losses)
 Pension and
 Energy, Inc.
    
Paid-in
 Retained
 Cash Flow
 Available-for-
 OPEB
 Stockholder's
 Noncontrolling
 Total
Paid-in
 Retained
 Cash Flow
 on Available-for-
 OPEB
 Stockholder's
 Noncontrolling
 Total
(in millions)Capital
 Earnings
 Hedges
 Sale Securities
 Adjustments
 Equity
 Interests
 Equity
Capital
 Earnings
 Hedges
 Sale Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2014$7,467
 $3,782
 $(35) $1
 $(7) $11,208
 $(32) $11,176
Net income
 1,051
 
 
 
 1,051
 11
 1,062
Other comprehensive income (loss)
 
 4
 (1) (10) (7) 
 (7)
Distributions to noncontrolling interests
 
 
 
 
 
 (4) (4)
Capital contribution from parent625
 
 
 
 
 625
 
 625
Other
 (2) 
 
 
 (2) 3
 1
Balance at December 31, 2015$8,092

$4,831

$(31)
$

$(17)
$12,875

$(22)
$12,853
$8,092
 $4,831
 $(31) $
 $(17) $12,875
 $(22) $12,853
Net income
 1,031
 
 
 
 1,031
 10
 1,041

 1,031
 
 
 
 1,031
 10
 1,041
Other comprehensive income
 
 8
 1
 1
 10
 
 10

 
 8
 1
 1
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
 
 
 
 
 
 (1) (1)
Dividends to parent
 (2,098) 
 
 
 (2,098) 
 (2,098)
 (2,098) 
 
 
 (2,098) 
 (2,098)
Other2
 
 
 
 
 2
 
 2
2
 
 
 
 
 2
 
 2
Balance at December 31, 2016$8,094

$3,764

$(23)
$1

$(16)
$11,820

$(13)
$11,807
$8,094

$3,764

$(23)
$1

$(16)
$11,820

$(13)
$11,807
Net income
 1,258
 
 
 
 1,258
 10
 1,268

 1,258
 
 
 
 1,258
 10
 1,268
Other comprehensive income
 
 5
 4
 4
 13
 
 13

 
 5
 4
 4
 13
 
 13
Dividends to parent(a)

 (672) 
 
 
 (672) 
 (672)
 (672) 
 
 
 (672) 
 (672)
Equitization of certain notes payable to affiliates1,047
 
 
 
 
 1,047
 
 1,047
1,047
 
 
 
 
 1,047
 
 1,047
Other2
 
 
 
 
 2
 
 2
2
 
 
 
 
 2
 
 2
Balance at December 31, 2017$9,143

$4,350

$(18)
$5

$(12)
$13,468

$(3)
$13,465
$9,143

$4,350

$(18)
$5

$(12)
$13,468

$(3)
$13,465
Net income
 1,027
 
 
 
 1,027
 6
 1,033
Other comprehensive income (loss)
 
 6
 (1) 5
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (250) 
 
 
 (250) 
 (250)
Other(b)

 4
 
 (5) 
 (1) 1
 
Balance at December 31, 2018$9,143

$5,131

$(12)
$(1)
$(7)
$14,254

$3

$14,257
(a)    Includes a $547 million non-cash dividend related to a legal entity restructuring.
(a)Includes a $547 million non-cash dividend related to a legal entity restructuring.
(b)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



102

REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Progress, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Progress, LLC and subsidiaries (the "Company") as of December 31, 20172018 and 2016,2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2017,2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20172018 and 2016,2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017,2018, in conformity with the accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019
We have served as the Company's auditor since 1930.




103

FINANCIAL STATEMENTS

PART II

DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Operating Revenues$5,129
 $5,277
 $5,290
$5,699
 $5,129
 $5,277
Operating Expenses          
Fuel used in electric generation and purchased power1,609
 1,830
 2,029
1,892
 1,609
 1,830
Operation, maintenance and other1,389
 1,504
 1,452
1,578
 1,439
 1,565
Depreciation and amortization725
 703
 643
991
 725
 703
Property and other taxes156
 156
 140
155
 156
 156
Impairment charges19
 1
 5
33
 19
 1
Total operating expenses3,898
 4,194
 4,269
4,649
 3,948
 4,255
Gains on Sales of Other Assets and Other, net4
 3
 3
9
 4
 3
Operating Income1,235
 1,086
 1,024
1,059
 1,185
 1,025
Other Income and Expenses, net65
 71
 71
87
 115
 132
Interest Expense293
 257
 235
319
 293
 257
Income Before Income Taxes1,007
 900
 860
827
 1,007
 900
Income Tax Expense292
 301
 294
160
 292
 301
Net Income and Comprehensive Income$715
 $599
 $566
$667
 $715
 $599
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS

104


PART II

DUKE ENERGY PROGRESS, LLC
CONSOLIDATED BALANCE SHEETS
December 31,December 31,
(in millions)2017
 2016
2018
 2017
ASSETS      
Current Assets      
Cash and cash equivalents$20
 $11
$23
 $20
Receivables (net of allowance for doubtful accounts of $1 at 2017 and $4 at 2016)56
 51
Receivables of VIEs (net of allowance for doubtful accounts of $5 at 2017 and 2016)459
 404
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $1 at 2017)75
 56
Receivables of VIEs (net of allowance for doubtful accounts of $5 at 2018 and 2017)547
 459
Receivables from affiliated companies3
 5
23
 3
Notes receivable from affiliated companies
 165
Inventory1,017

1,076
954

1,017
Regulatory assets352
 188
703
 352
Other97
 57
62
 97
Total current assets2,004
 1,957
2,387
 2,004
Property, Plant and Equipment      
Cost29,583
 28,419
31,459
 29,583
Accumulated depreciation and amortization(10,903) (10,561)(11,423) (10,903)
Generation facilities to be retired, net421
 529
362
 421
Net property, plant and equipment19,101
 18,387
20,398
 19,101
Other Noncurrent Assets      
Regulatory assets3,507
 3,243
4,111
 3,507
Nuclear decommissioning trust funds2,588
 2,217
2,503
 2,588
Other599
 525
612
 599
Total other noncurrent assets6,694
 5,985
7,226
 6,694
Total Assets$27,799
 $26,329
$30,011
 $27,799
LIABILITIES AND EQUITY      
Current Liabilities      
Accounts payable$402
 $589
$660
 $402
Accounts payable to affiliated companies179
 227
278
 179
Notes payable to affiliated companies240
 
294
 240
Taxes accrued64
 104
53
 64
Interest accrued102
 102
116
 102
Current maturities of long-term debt3
 452
603
 3
Asset retirement obligations295
 189
509
 295
Regulatory liabilities139
 158
178
 139
Other376
 365
408
 376
Total current liabilities1,800
 2,186
3,099
 1,800
Long-Term Debt7,204
 6,409
7,451
 7,204
Long-Term Debt Payable to Affiliated Companies150
 150
150
 150
Other Noncurrent Liabilities      
Deferred income taxes1,883
 3,323
2,119
 1,883
Asset retirement obligations4,378
 4,508
4,311
 4,378
Regulatory liabilities3,999
 1,946
3,955
 3,999
Accrued pension and other post-retirement benefit costs248
 252
237
 248
Investment tax credits143
 146
142
 143
Other45
 51
106
 45
Total other noncurrent liabilities10,696
 10,226
10,870
 10,696
Commitments and Contingencies      
Equity      
Member's Equity7,949
 7,358
8,441
 7,949
Total Liabilities and Equity$27,799
 $26,329
$30,011
 $27,799
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS

105


PART II

DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31,Years Ended December 31,
(in millions)2017 2016 20152018 2017 2016
CASH FLOWS FROM OPERATING ACTIVITIES          
Net income$715
 $599
 $566
$667
 $715
 $599
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation, amortization and accretion (including amortization of nuclear fuel)936
 907
 821
Depreciation and amortization (including amortization of nuclear fuel)1,183
 936
 907
Equity component of AFUDC(47) (50) (47)(57) (47) (50)
Gains on sales of other assets(5) (6) (7)(9) (5) (6)
Impairment charges19
 1
 5
33
 19
 1
Deferred income taxes384
 384
 354
236
 384
 384
Accrued pension and other post-retirement benefit costs(20) (32) (14)15
 (20) (32)
Contributions to qualified pension plans
 (24) (42)(25) 
 (24)
Payments for asset retirement obligations(192) (212) (109)(195) (192) (212)
Other rate case adjustments37
 
 
Provisions for rate refunds122
 
 
(Increase) decrease in          
Net realized and unrealized mark-to-market and hedging transactions(4) 4
 (3)5
 (4) 4
Receivables(58) (17) 43
(107) (58) (17)
Receivables from affiliated companies2
 11
 (6)(20) 2
 11
Inventory59
 12
 (50)63
 59
 12
Other current assets(75) 84
 185
(201) (75) 84
Increase (decrease) in          
Accounts payable(230) 181
 (65)219
 (230) 181
Accounts payable to affiliated companies(48) 37
 70
99
 (48) 37
Taxes accrued(39) 90
 (34)(11) (39) 90
Other current liabilities(131) 114
 76
46
 (131) 114
Other assets(53) (163) (83)(484) (53) (163)
Other liabilities(18) 12
 (66)12
 (18) 12
Net cash provided by operating activities1,195
 1,932
 1,594
1,628
 1,195
 1,932
CASH FLOWS FROM INVESTING ACTIVITIES          
Capital expenditures(1,715) (1,733) (1,669)(2,220) (1,715) (1,733)
Asset acquisition
 
 (1,249)
Purchases of available-for-sale securities(1,249) (1,658) (727)
Proceeds from sales and maturities of available-for-sale securities1,207
 1,615
 672
Purchases of debt and equity securities(1,236) (1,249) (1,658)
Proceeds from sales and maturities of debt and equity securities1,206
 1,207
 1,615
Net proceeds from the sales of other assets20
 
 
Proceeds from insurance4


 

 4
 
Notes receivable from affiliated companies165
 (165) 237

 165
 (165)
Other(55) 26
 (30)(115) (55) 26
Net cash used in investing activities(1,643) (1,915) (2,766)(2,345) (1,643) (1,915)
CASH FLOWS FROM FINANCING ACTIVITIES          
Proceeds from the issuance of long-term debt812
 505
 1,186
845
 812
 505
Payments for the redemption of long-term debt(470) (15) (991)(3) (470) (15)
Notes payable to affiliated companies240
 (209) 359
54
 240
 (209)
Capital contribution from parent
 
 626
Distributions to parent(124) (300) 
(175) (124) (300)
Other(1) (2) (2)(1) (1) (2)
Net cash provided by (used in) financing activities457
 (21) 1,178
720
 457
 (21)
Net increase (decrease) in cash and cash equivalents9
 (4) 6
3
 9
 (4)
Cash and cash equivalents at beginning of period11
 15
 9
20
 11
 15
Cash and cash equivalents at end of period$20
 $11
 $15
$23
 $20
 $11
Supplemental Disclosures:          
Cash paid for interest, net of amount capitalized$291
 $248
 $218
$303
 $291
 $248
Cash paid for (received from) income taxes59
 (287) (197)
Cash (received from) paid for income taxes(112) 59
 (287)
Significant non-cash transactions:          
Accrued capital expenditures191
 147
 143
220
 191
 147
See Notes to Consolidated Financial Statements



106

FINANCIAL STATEMENTS

PART II

DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Common
 Retained
 Member's
 Total
Member's
(in millions)Stock
 Earnings
 Equity
 Equity
Equity
Balance at December 31, 2014$2,159
 $3,708
 $
 $5,867
Net income
 355
 211
 566
Transfer to Member's Equity(2,159) (4,063) 6,222
 
Capital contribution from parent
 
 626
 626
Balance at December 31, 2015$
 $
 $7,059
 $7,059
$7,059
Net income
 
 599
 599
599
Distribution to parent
 
 (300) (300)(300)
Balance at December 31, 2016$
 $
 $7,358
 $7,358
$7,358
Net income
 
 715
 715
715
Distribution to parent
 
 (124) (124)(124)
Balance at December 31, 2017$
 $

$7,949
 $7,949
$7,949
Net income667
Distribution to parent(175)
Balance at December 31, 2018$8,441
See Notes to Consolidated Financial Statements



107

REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Florida, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Florida, LLC and subsidiaries (the "Company") as of December 31, 20172018 and 2016,2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2017,2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20172018 and 2016,2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017,2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2001.




FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,021
 $4,646
 $4,568
Operating Expenses     
Fuel used in electric generation and purchased power2,085
 1,808
 1,814
Operation, maintenance and other1,025
 853
 884
Depreciation and amortization628
 560
 509
Property and other taxes374
 347
 333
Impairment charges54
 138
 6
Total operating expenses4,166
 3,706
 3,546
Gains on Sales of Other Assets and Other, net1
 1
 
Operating Income856
 941
 1,022
Other Income and Expenses, net86
 96
 63
Interest Expense287
 279
 212
Income Before Income Taxes655
 758
 873
Income Tax Expense101
 46
 322
Net Income$554
 $712
 $551
Other Comprehensive (Loss) Income, net of tax     
Unrealized (losses) gains on available-for-sale securities(1) 3
 1
Other Comprehensive (Loss) Income, net of tax(1) 3
 1
Comprehensive Income$553
 $715
 $552
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$36
 $13
Receivables (net of allowance for doubtful accounts of $3 at 2018 and 2017)143
 65
Receivables of VIEs (net of allowance for doubtful accounts of $3 at 2018 and $2 at 2017)362
 321
Receivables from affiliated companies28
 2
Notes receivable from affiliated companies
 313
Inventory504

574
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)434
 389
Other (includes $39 at 2018 and $40 at 2017 related to VIEs)46
 86
Total current assets1,553
 1,763
Property, Plant and Equipment   
Cost18,792
 17,730
Accumulated depreciation and amortization(4,968) (4,947)
Net property, plant and equipment13,824
 12,783
Other Noncurrent Assets   
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)2,454
 2,503
Nuclear decommissioning trust funds659
 736
Other311
 284
Total other noncurrent assets3,424
 3,523
Total Assets$18,801
 $18,069
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$511
 $602
Accounts payable to affiliated companies91
 74
Notes payable to affiliated companies108
 
Taxes accrued74
 34
Interest accrued75
 56
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)270
 768
Asset retirement obligations5
 
Regulatory liabilities102
 74
Other406
 334
Total current liabilities1,642
 1,942
Long-Term Debt (includes $1,336 at 2018 and $1,389 at 2017 related to VIEs)7,051
 6,327
Other Noncurrent Liabilities   
Deferred income taxes1,986
 1,761
Asset retirement obligations586
 742
Regulatory liabilities1,094
 1,307
Accrued pension and other post-retirement benefit costs254
 264
Other93
 108
Total other noncurrent liabilities4,013
 4,182
Commitments and Contingencies   
Equity   
Member's equity6,097
 5,614
Accumulated other comprehensive income(2) 4
Total equity6,095
 5,618
Total Liabilities and Equity$18,801
 $18,069
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$554
 $712
 $551
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion793
 570
 516
Equity component of AFUDC(47) (45) (26)
Gains on sales of other assets(1) (1) 
Impairment charges54
 138
 6
Deferred income taxes159
 245
 224
Accrued pension and other post-retirement benefit costs5
 (13) 2
Contributions to qualified pension plans(20) 
 (20)
Payments for asset retirement obligations(35) (56) (58)
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions7
 5
 38
Receivables(100) (38) 23
Receivables from affiliated companies(26) 
 21
Inventory58
 66
 23
Other current assets59
 (138) (86)
Increase (decrease) in     
Accounts payable(1) (32) 71
Accounts payable to affiliated companies17
 (51) 9
Taxes accrued40
 1
 (117)
Other current liabilities82
 (37) (149)
Other assets(428) (229) (84)
Other liabilities(61) (82) (53)
Net cash provided by operating activities1,109
 1,015
 891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(1,634) (1,437) (1,583)
Purchases of debt and equity securities(517) (557) (485)
Proceeds from sales and maturities of debt and equity securities563
 617
 572
Proceeds from insurance
 4
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies313
 (313) 
Other(65) (31) 21
Net cash used in investing activities(1,340) (1,697) (1,397)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt988
 1,306
 1,870
Payments for the redemption of long-term debt(769) (342) (12)
Notes payable to affiliated companies108
 (297) (516)
Distribution to parent(75) 
 (775)
Other1
 (1) 
Net cash provided by financing activities253
 666
 567
Net increase (decrease) in cash, cash equivalents, and restricted cash22
 (16) 61
Cash, cash equivalents, and restricted cash at beginning of period53
 69
 8
Cash, cash equivalents, and restricted cash at end of period$75
 $53
 $69
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$270
 $274
 $208
Cash (received from) paid for income taxes(120) (197) 216
Significant non-cash transactions:     
Accrued capital expenditures258
 199
 170
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
    Accumulated 
    Other 
    Comprehensive 
    Income (Loss) 
    Net Unrealized
  
    Gains (Losses) on
  
  Member's
 Available-for-
 Total
(in millions) Equity
 Sale Securities
 Equity
Balance at December 31, 2015 $5,121
 $
 $5,121
Net income 551
 
 551
Other comprehensive income 
 1
 1
Distribution to parent (775) 
 (775)
Other 2
 
 2
Balance at December 31, 2016 $4,899
 $1
 $4,900
Net income 712
 
 712
Other comprehensive income 
 3
 3
Other 3
 
 3
Balance at December 31, 2017 $5,614
 $4
 $5,618
Net income 554
 
 554
Other comprehensive loss 
 (1) (1)
Distribution to parent (75) 
 (75)
Other(a)
 4
 (5) (1)
Balance at December 31, 2018 $6,097
 $(2) $6,095
(a)Amounts represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Ohio, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Ohio, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  2018
 2017
 2016
Operating Revenues     
Regulated electric$1,450
 $1,373
 $1,410
Regulated natural gas506
 508
 503
Nonregulated electric and other1
 42
 31
Total operating revenues1,957
 1,923
 1,944
Operating Expenses  
     
Fuel used in electric generation and purchased power – regulated412
 369
 442
Fuel used in electric generation and purchased power – nonregulated
 58
 51
Cost of natural gas  113
 107
 103
Operation, maintenance and other480
 530
 514
Depreciation and amortization268
 261
 233
Property and other taxes290
 278
 258
Impairment charges
 1
 
Total operating expenses1,563
 1,604
 1,601
(Losses) Gains on Sales of Other Assets and Other, net(106) 1
 2
Operating Income288
 320
 345
Other Income and Expenses, net23
 23
 11
Interest Expense92
 91
 86
Income From Continuing Operations Before Income Taxes219
 252
 270
Income Tax Expense From Continuing Operations43
 59
 78
Income From Continuing Operations176
 193
 192
(Loss) Income From Discontinued Operations, net of tax
 (1) 36
Net Income and Comprehensive Income$176
 $192
 $228
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$21
 $12
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $3 at 2017)102
 68
Receivables from affiliated companies114
 133
Notes receivable from affiliated companies
 14
Inventory126

133
Regulatory assets33
 49
Other24
 39
Total current assets420
 448
Property, Plant and Equipment   
Cost9,360
 8,732
Accumulated depreciation and amortization(2,717) (2,691)
Net property, plant and equipment6,643
 6,041
Other Noncurrent Assets   
Goodwill920
 920
Regulatory assets531
 445
Other41
 21
Total other noncurrent assets1,492
 1,386
Total Assets$8,555
 $7,875
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$316
 $313
Accounts payable to affiliated companies78
 62
Notes payable to affiliated companies274
 29
Taxes accrued202
 190
Interest accrued22
 21
Current maturities of long-term debt551
 3
Asset retirement obligations6
 3
Regulatory liabilities57
 36
Other74
 71
Total current liabilities1,580
 728
Long-Term Debt1,589
 2,039
Long-Term Debt Payable to Affiliated Companies25
 25
Other Noncurrent Liabilities   
Deferred income taxes817
 781
Asset retirement obligations87
 81
Regulatory liabilities840
 891
Accrued pension and other post-retirement benefit costs79
 59
Other93
 108
Total other noncurrent liabilities1,916
 1,920
Commitments and Contingencies   
Equity   
Common stock, $8.50 par value, 120 million shares authorized; 90 million shares outstanding at 2018 and 2017762
 762
Additional paid-in capital2,776
 2,670
Accumulated deficit(93) (269)
Total equity3,445
 3,163
Total Liabilities and Equity$8,555
 $7,875
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$176
 $192
 $228
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion271
 265
 237
Equity component of AFUDC(11) (11) (6)
Losses (Gains) on sales of other assets106
 (1) (2)
Impairment charges
 1
 
Deferred income taxes25
 90
 55
Accrued pension and other post-retirement benefit costs3
 2
 6
Contributions to qualified pension plans
 (4) (5)
Payments for asset retirement obligations(3) (7) (5)
Provision for rate refunds24
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions
 
 (2)
Receivables(33) 2
 (4)
Receivables from affiliated companies19
 (4) (36)
Inventory7
 6
 (32)
Other current assets16
 (22) 79
Increase (decrease) in     
Accounts payable(19) 12
 19
Accounts payable to affiliated companies16
 (1) 10
Taxes accrued12
 11
 3
Other current liabilities14
 (19) (54)
Other assets(26) (28) (35)
Other liabilities(27) (5) (31)
Net cash provided by operating activities570
 479
 425
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(827) (686) (476)
Notes receivable from affiliated companies14
 80
 (94)
Other(89) (41) (30)
Net cash used in investing activities(902) (647) (600)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt99
 182
 341
Payments for the redemption of long-term debt(3) (2) (53)
Notes payable to affiliated companies245
 13
 (87)
Dividends to parent
 (25) (25)
Other
 (1) (2)
Net cash provided by financing activities341
 167
 174
Net increase (decrease) in cash and cash equivalents9
 (1) (1)
Cash and cash equivalents at beginning of period12
 13
 14
Cash and cash equivalents at end of period$21
 $12
 $13
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$87
 $85
 $81
Cash received from income taxes(6) (8) (46)
Significant non-cash transactions:     
Accrued capital expenditures95
 82
 83
Non-cash equity contribution from parent106
 
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Additional
    
 Common
 Paid-in
 Accumulated
 Total
(in millions)Stock
 Capital
 Deficit
 Equity
Balance at December 31, 2015$762
 $2,720
 $(698) $2,784
Net income
 
 228
 228
Contribution from parent
 
 9
 9
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2016$762
 $2,695
 $(461) $2,996
Net income
 
 192
 192
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2017$762

$2,670

$(269)
$3,163
Net income
 
 176
 176
Contribution from parent
 106
 
 106
Balance at December 31, 2018$762
 $2,776
 $(93) $3,445
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Indiana, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Indiana, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019
We have served as the Company's auditor since 2001.2002.




108

FINANCIAL STATEMENTS

PART II

DUKE ENERGY FLORIDA,INDIANA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Operating Revenues$4,646
 $4,568
 $4,977
$3,059
 $3,047
 $2,958
Operating Expenses          
Fuel used in electric generation and purchased power1,808
 1,814
 2,195
1,000

966
 909
Operation, maintenance and other818
 865
 835
788

743
 727
Depreciation and amortization560
 509
 473
520

458
 496
Property and other taxes347
 333
 352
78

76
 58
Impairment charges138
 6
 7
30

18
 8
Total operating expenses3,671
 3,527
 3,862
2,416
 2,261
 2,198
Gains on Sales of Other Assets and Other, net1
 
 

 
 1
Operating Income976
 1,041
 1,115
643
 786
 761
Other Income and Expenses, net61
 44
 24
45
 47
 26
Interest Expense279
 212
 198
167
 178
 181
Income Before Income Taxes758
 873
 941
521

655

606
Income Tax Expense46
 322
 342
128
 301
 225
Net Income$712
 $551
 $599
$393

$354

$381
Other Comprehensive Income, net of tax     
Unrealized gains on available-for-sale securities3
 1
 
Other Comprehensive Income, net of tax3
 1
 
Other Comprehensive Loss, net of tax     
Reclassification into earnings from cash flow hedges
 
 (1)
Comprehensive Income$715
 $552
 $599
$393

$354

$380
See Notes to Consolidated Financial Statements



109

FINANCIAL STATEMENTS

PART II

DUKE ENERGY FLORIDA,INDIANA, LLC
CONSOLIDATED BALANCE SHEETS
December 31,December 31,
(in millions)2017
 2016
2018
 2017
ASSETS      
Current Assets      
Cash and cash equivalents$13
 $16
$24
 $9
Receivables (net of allowance for doubtful accounts of $3 at 2017 and $2 at 2016)65
 61
Receivables of VIEs (net of allowance for doubtful accounts of $2 at 2017 and 2016)321
 288
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)52
 57
Receivables from affiliated companies2
 5
122
 125
Notes receivable from affiliated companies313
 
Inventory574

641
422

450
Regulatory assets (includes $51 at 2017 and $50 at 2016 related to VIEs)389
 213
Other (includes $40 at 2017 and $53 at 2016 related to VIEs)86
 125
Regulatory assets175
 165
Other35
 30
Total current assets1,763
 1,349
830
 836
Property, Plant and Equipment      
Cost17,730
 16,434
15,443
 14,948
Accumulated depreciation and amortization(4,947) (4,644)(4,914) (4,662)
Net property, plant and equipment12,783
 11,790
10,529
 10,286
Other Noncurrent Assets     
Regulatory assets (includes $1,091 at 2017 and $1,142 at 2016 related to VIEs)2,503
 2,480
Nuclear decommissioning trust funds736
 715
Regulatory assets982
 978
Other284
 278
194
 189
Total other noncurrent assets3,523
 3,473
1,176
 1,167
Total Assets$18,069
 $16,612
$12,535
 $12,289
LIABILITIES AND EQUITY      
Current Liabilities      
Accounts payable$602
 $413
$200
 $196
Accounts payable to affiliated companies74
 125
83
 78
Notes payable to affiliated companies
 297
167
 161
Taxes accrued34
 33
43
 95
Interest accrued56
 49
58
 57
Current maturities of long-term debt (includes $53 at 2017 and $62 at 2016 related to VIEs)768
 326
Current maturities of long-term debt63
 3
Asset retirement obligations109
 54
Regulatory liabilities74
 31
25
 24
Other334
 352
107
 104
Total current liabilities1,942
 1,626
855
 772
Long-Term Debt (includes $1,389 at 2017 and $1,442 at 2016 related to VIEs)6,327
 5,799
Long-Term Debt3,569
 3,630
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities      
Deferred income taxes1,761
 2,694
1,009
 925
Asset retirement obligations742
 778
613
 727
Regulatory liabilities1,307
 448
1,722
 1,723
Accrued pension and other post-retirement benefit costs264
 262
115
 76
Investment tax credits147
 147
Other108
 105
16
 18
Total other noncurrent liabilities4,182
 4,287
3,622
 3,616
Commitments and Contingencies      
Equity      
Member's equity5,614
 4,899
Accumulated other comprehensive income4
 1
Total equity5,618
 4,900
Member's Equity4,339
 4,121
Total Liabilities and Equity$18,069
 $16,612
$12,535
 $12,289
See Notes to Consolidated Financial Statements



110

FINANCIAL STATEMENTS

PART II

DUKE ENERGY FLORIDA,INDIANA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES          
Net income$712
 $551
 $599
$393
 $354
 $381
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation, amortization and accretion570
 516
 480
Depreciation, amortization, and accretion524
 462
 499
Equity component of AFUDC(45) (26) (7)(32) (28) (16)
Gains on sales of other assets(1) 
 
Impairment charges138
 6
 7
30
 18
 8
Deferred income taxes245
 224
 348
95
 152
 213
Accrued pension and other post-retirement benefit costs(13) 2
 5
7
 2
 8
Contributions to qualified pension plans
 (20) (40)(8) 
 (9)
Payments for asset retirement obligations(56) (58) (47)(69) (45) (46)
Provision for rate refunds53
 
 
(Increase) decrease in          
Net realized and unrealized mark-to-market and hedging transactions5
 38
 (3)
Receivables(38) 23
 61
7
 59
 (2)
Receivables from affiliated companies
 21
 (44)3
 (11) (43)
Inventory66
 23
 (17)28
 54
 66
Other current assets(125) (133) 116
(25) 28
 (67)
Increase (decrease) in          
Accounts payable(32) 71
 (127)37
 (86) 8
Accounts payable to affiliated companies(51) 9
 46
5
 4
 (9)
Taxes accrued1
 (117) 67
(52) 64
 (4)
Other current liabilities(37) (149) 57
14
 (10) (81)
Other assets(229) (84) (84)29
 (28) (27)
Other liabilities(82) (53) (44)(33) (20) (8)
Net cash provided by operating activities1,028
 844
 1,373
1,006
 969
 871
CASH FLOWS FROM INVESTING ACTIVITIES          
Capital expenditures(1,437) (1,583) (1,029)(832) (840) (755)
Purchases of available-for-sale securities(557) (485) (447)
Proceeds from sales and maturities of available-for-sale securities617
 572
 538
Proceeds from insurance4
 58
 
Proceeds from the sale of nuclear fuel20
 20
 102
Purchases of debt and equity securities(48) (20) (14)
Proceeds from sales and maturities of debt and equity securities44
 7
 11
Proceeds from the sales of other assets15
 
 
Notes receivable from affiliated companies(313) 
 

 86
 (3)
Change in restricted cash
 (6) 
Other(31) 21
 (3)3
 (65) 32
Net cash used in investing activities(1,697) (1,403) (839)(818) (832) (729)
CASH FLOWS FROM FINANCING ACTIVITIES          
Proceeds from the issuance of long-term debt1,306
 1,870
 

 
 494
Payments for the redemption of long-term debt(342) (12) (562)(3) (5) (478)
Notes payable to affiliated companies(297) (516) 729
6
 161
 
Dividends to parent
 
 (350)
Distribution to parent
 (775) (350)
Distributions to parent(175) (300) (149)
Other(1) 
 (1)(1) (1) (1)
Net cash provided by (used in) financing activities666
 567
 (534)
Net (decrease) increase in cash and cash equivalents(3) 8
 
Net cash used in financing activities(173) (145) (134)
Net increase (decrease) in cash and cash equivalents15
 (8) 8
Cash and cash equivalents at beginning of period16
 8
 8
9
 17
 9
Cash and cash equivalents at end of period$13
 $16
 $8
$24
 $9
 $17
Supplemental Disclosures:          
Cash paid for interest, net of amount capitalized$274
 $208
 $205
$162
 $179
 $171
Cash (received from) paid for income taxes(197) 216
 (229)
Cash paid for (received from) income taxes75
 117
 (7)
Significant non-cash transactions:          
Accrued capital expenditures199
 170
 186
88
 125
 99
See Notes to Consolidated Financial Statements



111

FINANCIAL STATEMENTS

PART II

DUKE ENERGY FLORIDA,INDIANA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
      Accumulated 
      Other         Accumulated  
      Comprehensive         Other  
      Income         Comprehensive  
      Net Unrealized
          Income  
      Gains on
    Additional
     Net Gains on
  
Common
 Retained
 Member's
 Available-for-
 Total
Common
 Paid-in
 Retained
 Member's
 Cash Flow
 Total
(in millions)Stock
 Earnings
 Equity
 Sale Securities
 Equity
Stock
 Capital
 Earnings
 Equity
 Hedges
 Equity
Balance at December 31, 2014$1,762
 $3,460
 $
 $
 $5,222
Net income
 351
 248
 
 599
Transfer to Member's Equity(1,762) (3,461) 5,223
 
 
Dividends to parent
 (350) 
 
 (350)
Distribution to parent
 
 (350) 
 (350)
Balance at December 31, 2015$
 $
 $5,121
 $
 $5,121
$1
 $1,384
 $2,450
 $
 $1
 $3,836
Net income
 
 551
 
 551

 
 
 381
 
 381
Other comprehensive income
 
 
 1
 1
Distribution to parent
 
 (775) 
 (775)
Other
 
 2
 
 2
Other comprehensive loss
 
 
 
 (1) (1)
Distributions to parent
 
 
 (149) 
 (149)
Transfer to Member's Equity(1) (1,384) (2,450) 3,835
 
 
Balance at December 31, 2016$
 $
 $4,899
 $1
 $4,900
$

$

$

$4,067
 $

$4,067
Net income
 
 712
 
 712

 
 
 354
 
 354
Other comprehensive income
 
 
 3
 3
Other
 
 3
 
 3
Distributions to parent
 
 
 (300) 
 (300)
Balance at December 31, 2017$
 $
 $5,614
 $4
 $5,618
$

$

$

$4,121
 $

$4,121
Net income
 
 
 393
 
 393
Distributions to parent
 
 
 (175) 
 (175)
Balance at December 31, 2018$

$

$

$4,339
 $

$4,339
See Notes to Consolidated Financial Statements



112

REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Ohio,Piedmont Natural Gas Company, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Ohio,Piedmont Natural Gas Company, Inc. and subsidiaries (the "Company") as of December 31, 20172018 and 2016,2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the periodperiods ended December 31, 2018, December 31, 2017, October 31 2016, and for the two months ended December 31, 2016 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20172018 and 2016,2017, and the results of its operations and its cash flows for each of the three years in the periodperiods ended December 31, 2018, December 31, 2017, October 31, 2016, and for the two months ended December 31, 2016, in conformity with the accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 2018
We have served as the Company's auditor since 2002.


113


PART II

DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  2017
 2016
 2015
Operating Revenues     
Regulated electric$1,373
 $1,410
 $1,331
Nonregulated electric and other42
 31
 33
Regulated natural gas508
 503
 541
Total operating revenues1,923
 1,944
 1,905
Operating Expenses  
     
Fuel used in electric generation and purchased power – regulated369
 442
 446
Fuel used in electric generation and purchased power – nonregulated58
 51
 47
Cost of natural gas  107
 103
 141
Operation, maintenance and other524
 512
 495
Depreciation and amortization261
 233
 227
Property and other taxes278
 258
 254
Impairment charges1
 
 
Total operating expenses1,598
 1,599
 1,610
Gains on Sales of Other Assets and Other, net1
 2
 8
Operating Income326
 347
 303
Other Income and Expenses, net17
 9
 6
Interest Expense91
 86
 79
Income From Continuing Operations Before Income Taxes252
 270
 230
Income Tax Expense From Continuing Operations59
 78
 81
Income From Continuing Operations193
 192
 149
(Loss) Income From Discontinued Operations, net of tax(1) 36
 23
Net Income and Comprehensive Income$192
 $228
 $172
See Notes to Consolidated Financial Statements

114


PART II

DUKE ENERGY OHIO, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2017
 2016
ASSETS   
Current Assets   
Cash and cash equivalents$12
 $13
Receivables (net of allowance for doubtful accounts of $3 at 2017 and $2 at 2016)68
 71
Receivables from affiliated companies133
 129
Notes receivable from affiliated companies14
 94
Inventory133

137
Regulatory assets49
 37
Other39
 37
Total current assets448
 518
Property, Plant and Equipment   
Cost8,732
 8,126
Accumulated depreciation and amortization(2,691) (2,579)
Net property, plant and equipment6,041
 5,547
Other Noncurrent Assets   
Goodwill920
 920
Regulatory assets445
 520
Other21
 23
Total other noncurrent assets1,386
 1,463
Total Assets$7,875
 $7,528
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$313
 $282
Accounts payable to affiliated companies62
 63
Notes payable to affiliated companies29
 16
Taxes accrued190
 178
Interest accrued21
 19
Current maturities of long-term debt3
 1
Asset retirement obligations3
 
Regulatory liabilities36
 21
Other71
 91
Total current liabilities728
 671
Long-Term Debt2,039
 1,858
Long-Term Debt Payable to Affiliated Companies25
 25
Other Noncurrent Liabilities   
Deferred income taxes781
 1,443
Asset retirement obligations81
 77
Regulatory liabilities891
 236
Accrued pension and other post-retirement benefit costs59
 56
Other108
 166
Total other noncurrent liabilities1,920
 1,978
Commitments and Contingencies   
Equity   
Common stock, $8.50 par value, 120 million shares authorized; 90 million shares outstanding at 2017 and 2016762
 762
Additional paid-in capital2,670
 2,695
Accumulated deficit(269) (461)
Total equity3,163
 2,996
Total Liabilities and Equity$7,875
 $7,528
See Notes to Consolidated Financial Statements

115


PART II

DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2017
 2016
 2015
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$192
 $228
 $172
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion265
 237
 230
Equity component of AFUDC(11) (6) (3)
Gains on sales of other assets(1) (2) (8)
Impairment charges1
 
 40
Deferred income taxes90
 55
 206
Accrued pension and other post-retirement benefit costs2
 6
 9
Contributions to qualified pension plans(4) (5) (8)
Payments for asset retirement obligations(7) (5) (4)
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions
 (2) (10)
Receivables2
 (4) 23
Receivables from affiliated companies(4) (36) 23
Inventory6
 (32) 
Other current assets(22) 79
 
Increase (decrease) in     
Accounts payable12
 19
 (1)
Accounts payable to affiliated companies(1) 10
 (21)
Taxes accrued11
 3
 (21)
Other current liabilities(19) (54) 88
Other assets(28) (35) 25
Other liabilities(5) (31) (73)
Net cash provided by operating activities479
 425
 667
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(686) (476) (399)
Notes receivable from affiliated companies80
 (94) 145
Other(41) (30) (15)
Net cash used in investing activities(647) (600) (269)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt182
 341
 
Payments for the redemption of long-term debt(2) (53) (157)
Notes payable to affiliated companies13
 (87) (95)
Dividends to parent(25) (25) (150)
Other(1) (2) (2)
Net cash provided by (used in) financing activities167
 174
 (404)
Net decrease in cash and cash equivalents(1) (1) (6)
Cash and cash equivalents at beginning of period13
 14
 20
Cash and cash equivalents at end of period$12
 $13
 $14
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$85
 $81
 $76
Cash (received from) paid for income taxes(8) (46) 410
Significant non-cash transactions:     
Accrued capital expenditures82
 83
 20
Distribution of membership interest of Duke Energy SAM, LLC to parent
 
 1,912
See Notes to Consolidated Financial Statements

116


PART II

DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
        
        
        
        
   Additional
    
 Common
 Paid-in
 Accumulated
 Total
(in millions)Stock
 Capital
 Deficit
 Equity
Balance at December 31, 2014$762
 $4,782
 $(870) $4,674
Net income
 
 172
 172
Dividends to parent
 (150) 
 (150)
Distribution of membership interest of Duke Energy SAM, LLC to parent
 (1,912) 
 (1,912)
Balance at December 31, 2015$762
 $2,720
 $(698) $2,784
Net income
 
 228
 228
Contribution from parent
 
 9
 9
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2016$762

$2,695

$(461)
$2,996
Net income
 
 192
 192
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2017$762
 $2,670
 $(269) $3,163
See Notes to Consolidated Financial Statements

117


PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Indiana, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Indiana, LLC and subsidiaries (the "Company") as of December 31, 2017 and 2016, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2017, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017, in conformity with the accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 2018
We have served as the Company's auditor since 2002.


118


PART II

DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2017
 2016
 2015
Operating Revenues$3,047
 $2,958
 $2,890
Operating Expenses     
Fuel used in electric generation and purchased power966

909
 982
Operation, maintenance and other733

723
 682
Depreciation and amortization458

496
 434
Property and other taxes76

58
 61
Impairment charges18

8
 88
Total operating expenses2,251
 2,194
 2,247
Gains on Sales of Other Assets and Other, net
 1
 1
Operating Income796
 765
 644
Other Income and Expenses, net37
 22
 11
Interest Expense178
 181
 176
Income Before Income Taxes655

606

479
Income Tax Expense301
 225
 163
Net Income$354

$381

$316
Other Comprehensive Loss, net of tax     
Reclassification into earnings from cash flow hedges
 (1) (2)
Comprehensive Income$354

$380

$314
See Notes to Consolidated Financial Statements

119


PART II

DUKE ENERGY INDIANA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2017
 2016
ASSETS   
Current Assets   
Cash and cash equivalents$9
 $17
Receivables (net of allowance for doubtful accounts of $2 at 2017 and $1 at 2016)57
 105
Receivables from affiliated companies125
 114
Notes receivable from affiliated companies
 86
Inventory450

504
Regulatory assets165
 149
Other30
 45
Total current assets836
 1,020
Property, Plant and Equipment   
Cost14,948
 14,241
Accumulated depreciation and amortization(4,662) (4,317)
Net property, plant and equipment10,286
 9,924
Other Noncurrent Assets  
Regulatory assets978
 1,073
Other189
 147
Total other noncurrent assets1,167
 1,220
Total Assets$12,289
 $12,164
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$196
 $263
Accounts payable to affiliated companies78
 74
Notes payable to affiliated companies161
 
Taxes accrued95
 31
Interest accrued57
 61
Current maturities of long-term debt3
 3
Asset retirement obligations54
 
Regulatory liabilities24
 40
Other104
 93
Total current liabilities772
 565
Long-Term Debt3,630
 3,633
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes925
 1,900
Asset retirement obligations727
 866
Regulatory liabilities1,723
 748
Accrued pension and other post-retirement benefit costs76
 71
Investment tax credits147
 137
Other18
 27
Total other noncurrent liabilities3,616
 3,749
Commitments and Contingencies   
Equity   
Member's Equity4,121
 4,067
Total Liabilities and Equity$12,289
 $12,164
See Notes to Consolidated Financial Statements

120


PART II

DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2017
 2016
 2015
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$354
 $381
 $316
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization462
 499
 439
Equity component of AFUDC(28) (16) (11)
Gains on sales of other assets
 
 (1)
Impairment charges18
 8
 88
Deferred income taxes152
 213
 262
Accrued pension and other post-retirement benefit costs2
 8
 13
Contributions to qualified pension plans
 (9) (19)
Payments for asset retirement obligations(45) (46) (19)
(Increase) decrease in     
Receivables59
 (2) (7)
Receivables from affiliated companies(11) (43) 44
Inventory54
 66
 (21)
Other current assets28
 (67) 90
Increase (decrease) in     
Accounts payable(86) 8
 33
Accounts payable to affiliated companies4
 (9) 25
Taxes accrued64
 (4) 35
Other current liabilities(10) (81) 26
Other assets(28) (27) (82)
Other liabilities(20) (8) (35)
Net cash provided by operating activities969
 871
 1,176
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(840) (755) (690)
Purchases of available-for-sale securities(20) (14) (9)
Proceeds from sales and maturities of available-for-sale securities7
 11
 11
Proceeds from the sales of other assets
 
 17
Notes receivable from affiliated companies86
 (3) (83)
Other(65) 32
 (17)
Net cash used in investing activities(832) (729) (771)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt
 494
 
Payments for the redemption of long-term debt(5) (478) (5)
Notes payable to affiliated companies161
 
 (71)
Dividends to parent
 
 (326)
Distributions to parent(300) (149) 
Other(1) (1) 
Net cash used in financing activities(145) (134) (402)
Net (decrease) increase in cash and cash equivalents(8) 8
 3
Cash and cash equivalents at beginning of period17
 9
 6
Cash and cash equivalents at end of period$9
 $17
 $9
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$179
 $171
 $175
Cash paid for (received from) income taxes117
 (7) (253)
Significant non-cash transactions:     
Accrued capital expenditures125
 99
 64
See Notes to Consolidated Financial Statements

121


PART II

DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         Accumulated  
         Other  
         Comprehensive  
         Income  
   Additional
     Net Gains on
  
 Common
 Paid-in
 Retained
 Member's
 Cash Flow
 Total
(in millions)Stock
 Capital
 Earnings
 Equity
 Hedges
 Equity
Balance at December 31, 2014$1
 $1,384
 $2,460
 $
 $3
 $3,848
Net income
 
 316
 
 
 316
Other comprehensive loss
 
 
 
 (2) (2)
Dividends to parent
 
 (326) 
 
 (326)
Balance at December 31, 2015$1

$1,384

$2,450

$
 $1

$3,836
Net income
 
 
 381
 
 381
Other comprehensive loss
 
 
 
 (1) (1)
Distributions to parent
 
 
 (149) 
 (149)
Transfer to Member's Equity(1) (1,384) (2,450) 3,835
 
 
Balance at December 31, 2016$

$

$

$4,067
 $

$4,067
Net income
 
 
 354
 
 354
Distributions to parent
 
 
 (300) 
 (300)
Balance at December 31, 2017$

$

$

$4,121
 $

$4,121
See Notes to Consolidated Financial Statements

122


PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Piedmont Natural Gas Company, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Piedmont Natural Gas Company, Inc. and subsidiaries (the "Company") as of December 31, 2017 and 2016, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the periods ended December 31, 2017, October 31, 2016, October 31, 2015 and for the 2 months ended December 31, 2016 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the periods ended December 31, 2017, October 31, 2016, October 31, 2015 and for the 2 months ended December 31, 2016, in conformity with the accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Emphasis of Matter
As discussed in Note 1 to the financial statements, effective for fiscal year 2016, the Company changed its fiscal year end from October 31 to December 31. This resulted in a 2-monthtwo-month transition period beginning November 1, 2016 through December 31, 2016.



/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019
We have served as the Company's auditor since 1951.




123

FINANCIAL STATEMENTS

PART II

PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Year Ended Two Months Ended Years Ended October 31,Years Ended December 31, Two Months Ended
December 31,
 Year Ended
October 31,
(in millions)December 31, 2017
 December 31, 2016 2016
 2015
2018
 2017
 2016
 2016
Operating Revenues              
Regulated natural gas$1,319
 $320
 $1,139
 $1,372
$1,365
 $1,319
 $320
 $1,139
Nonregulated natural gas and other9
 2
 10
 11
10
 9
 2
 10
Total operating revenues1,328
 322
 1,149
 1,383
1,375
 1,328
 322
 1,149
Operating Expenses              
Cost of natural gas524
 144
 391
 644
584
 524
 144
 391
Operation, maintenance and other315
 52
 353
 305
357
 304
 50
 353
Depreciation and amortization148
 23
 137
 129
159
 148
 23
 137
Property and other taxes48
 7
 43
 42
49
 48
 7
 43
Impairment charges7
 
 
 

 7
 
 
Total operating expenses1,042
 226

924

1,120
1,149
 1,031

224
 924
Operating Income286
 96

225

263
226
 297

98
 225
Equity in (losses) earnings of unconsolidated affiliates(6) 2
 29
 34
Equity in earnings (losses) of unconsolidated affiliates7
 (6) 2
 29
Gain on sale of unconsolidated affiliates
 
 133
 

 
 
 133
Other income and expense, net
 
 (1) (1)14
 (11) (2) (1)
Total other income and expenses(6) 2

161

33
21
 (17)

 161
Interest Expense79
 12
 69
 69
81
 79
 12
 69
Income Before Income Taxes201
 86

317

227
166
 201

86
 317
Income Tax Expense62
 32
 124
 90
37
 62
 32
 124
Net Income$139
 $54

$193

$137
$129
 $139

$54
 $193
Other Comprehensive Income (Loss), net of tax       
Other Comprehensive Income, net of tax       
Unrealized loss from hedging activities of equity method investments
 
 (3) (2)
 
 
 (3)
Reclassification into earnings from hedging activities of equity method investments
 
 4
 1

 
 
 4
Other Comprehensive Income (Loss), net of tax
 
 1
 (1)
Other Comprehensive Income, net of tax
 
 
 1
Comprehensive Income$139
 $54
 $194
 $136
$129
 $139
 $54
 $194
See Notes to Consolidated Financial Statements




124

FINANCIAL STATEMENTS

PART II

PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED BALANCE SHEETS
December 31,December 31,
(in millions)2017
 2016
2018
 2017
ASSETS      
Current Assets      
Cash and cash equivalents$19
 $25
$
 $19
Receivables (net of allowance for doubtful accounts of $2 at 2017 and $3 at 2016)275
 232
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)266
 275
Receivables from affiliated companies7
 7
22
 7
Inventory66
 66
70
 66
Regulatory assets95
 124
54
 95
Other52
 21
19
 52
Total current assets514
 475
431
 514
Property, Plant and Equipment      
Cost6,725
 6,174
7,486
 6,725
Accumulated depreciation and amortization(1,479) (1,360)(1,575) (1,479)
Net property, plant and equipment5,246
 4,814
5,911
 5,246
Other Noncurrent Assets      
Goodwill49
 49
49
 49
Regulatory assets283
 373
303
 283
Investments in equity method unconsolidated affiliates61
 212
64
 61
Other65
 21
52
 65
Total other noncurrent assets458
 655
468
 458
Total Assets$6,218
 $5,944
$6,810
 $6,218
LIABILITIES AND EQUITY      
Current Liabilities      
Accounts payable$125
 $155
$203
 $125
Accounts payable to affiliated companies13
 8
38
 13
Notes payable and commercial paper
 330
Notes payable to affiliated companies364
 
198
 364
Taxes accrued19
 67
84
 19
Interest accrued31
 33
31
 31
Current maturities of long-term debt250
 35
350
 250
Regulatory liabilities3
 
37
 3
Other69
 102
58
 69
Total current liabilities874
 730
999
 874
Long-Term Debt1,787
 1,786
1,788
 1,787
Other Noncurrent Liabilities      
Deferred income taxes564
 931
551
 564
Asset retirement obligations15
 14
19
 15
Regulatory liabilities1,141
 608
1,181
 1,141
Accrued pension and other post-retirement benefit costs5
 14
4
 5
Other170
 189
177
 170
Total other noncurrent liabilities1,895
 1,756
1,932
 1,895
Commitments and Contingencies      
Equity      
Common stock, no par value: 100 shares authorized and outstanding at 2017 and 2016860
 860
Common stock, no par value: 100 shares authorized and outstanding at 2018 and 20171,160
 860
Retained earnings802
 812
931
 802
Total equity1,662
 1,672
2,091
 1,662
Total Liabilities and Equity$6,218
 $5,944
$6,810
 $6,218

See Notes to Consolidated Financial Statements




125

FINANCIAL STATEMENTS

PART II

PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
Year Ended Two Months Ended Years Ended October 31,Years Ended December 31, Two Months Ended December 31, Year Ended October 31,
(in millions)December 31, 2017
 December 31, 2016
 2016
 2015
2018
 2017
 2016
 2016
CASH FLOWS FROM OPERATING ACTIVITIES              
Net income$139
 $54
 $193
 $137
$129
 $139
 $54
 $193
Adjustments to reconcile net income to net cash provided by operating activities:              
Depreciation and amortization151
 25
 148
 140
161
 151
 25
 148
Gains on sales of other assets
 
 (133) 

 
 
 (133)
Impairment charges7
 
 
 

 7
 
 
Deferred income taxes154
 26
 74
 73
(31) 154
 26
 74
Equity in losses (earnings) from unconsolidated affiliates6
 (2) (29) (34)
Equity in (earnings) losses from unconsolidated affiliates(7) 6
 (2) (29)
Accrued pension and other post-retirement benefit costs23
 5
 3
 8
(4) 23
 5
 3
Contributions to qualified pension plans(11) (10) (14) (13)
 (11) (10) (14)
Payments for asset retirement obligations
 (1) (6) (6)
 
 (1) (6)
Provision for rate refunds43
 
 
 
(Increase) decrease in              
Receivables(40) (157) 12
 3
7
 (40) (157) 12
Receivables from affiliated companies
 
 (7) 
(15) 
 
 (7)
Inventory
 (11) 14
 16
(4) 
 (11) 14
Other current assets(20) 8
 (98) 46
71
 (20) 8
 (98)
Increase (decrease) in              
Accounts payable(13) 35
 6
 (5)15
 (13) 35
 6
Accounts payable to affiliated companies5
 4
 6
 
25
 5
 4
 6
Taxes accrued(48) (2) 38
 4
65
 (48) (2) 38
Other current liabilities(9) 2
 28
 (21)21
 (9) 2
 28
Other assets7
 (7) (107) (5)6
 7
 (7) (91)
Other liabilities(2) 5
 180
 29
(4) (2) 5
 180
Net cash provided by (used in) operating activities349
 (26) 308
 372
478
 349
 (26) 324
CASH FLOWS FROM INVESTING ACTIVITIES              
Capital expenditures(585) (113) (522) (444)(721) (585) (113) (522)
Contributions to equity method investments(12) (12) (47) (30)
 (12) (12) (47)
Proceeds from the sales of other assets
 
 175
 

 
 
 175
Other(6) 1
 21
 (5)(10) (6) 1
 5
Net cash used in investing activities(603) (124) (373) (479)(731) (603) (124) (389)
CASH FLOWS FROM FINANCING ACTIVITIES              
Proceeds from the:              
Issuance of long-term debt250
 
 295
 148
100
 250
 
 295
Issuance of common stock
 
 122
 81

 
 
 122
Payments for the redemption of long-term debt(35) 
 (40) 

 (35) 
 (40)
Notes payable and commercial paper(330) 185
 (195) (15)
 (330) 185
 (195)
Notes payable to affiliated companies364
 
 
 
(166) 364
 
 
Capital contribution from parent300
 
 
 
Dividends to parent
 (27) 
 

 
 (27) 
Dividends paid
 
 (114) (103)
 
 
 (114)
Other(1) 
 
 

 (1) 
 
Net cash provided by financing activities248
 158
 68
 111
234
 248
 158
 68
Net (decrease) increase in cash and cash equivalents(6) 8
 3
 4
(19) (6) 8
 3
Cash and cash equivalents at beginning of period25
 17
 14
 10
19
 25
 17
 14
Cash and cash equivalents at end of period$19
 $25
 $17
 $14
$
 $19
 $25
 $17
Supplemental Disclosures:              
Cash paid for interest, net of amount capitalized$78
 $11
 $81
 $72
$79
 $78
 $11
 $81
Cash (received from) paid for income taxes(12) 
 (25) 3
Cash received from income taxes(16) (12) 
 (25)
Significant non-cash transactions:              
Accrued capital expenditures34
 48
 63
 59
96
 34
 48
 63
Transfer of ownership interest of certain equity method investees to parent149
 
 
 

 149
 
 

See Notes to Consolidated Financial Statements




126

FINANCIAL STATEMENTS

PART II

PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
    Accumulated      Accumulated  
    Other      Other  
     Comprehensive        Comprehensive   
    Income (Loss)      Income (Loss)  
    Net Loss on
      Net Gain on
  
    Hedging Activities
      Hedging Activities
  
Common
 Retained
 of Unconsolidated
 Total
Common
 Retained
 of Unconsolidated
 Total
(in millions)Stock
 Earnings
 Affiliates
 Equity
Stock
 Earnings
 Affiliates
 Equity
Balance at October 31, 2014$637
 $672
 $
 $1,309
Net income
 137
 
 137
Other comprehensive loss
 
 (1) (1)
Common stock issuances, including dividend reinvestment and employee benefits85
 
 
 85
Expenses from issuance of common stock(1) 
 
 (1)
Common stock dividends
 (103) 
 (103)
Balance at October 31, 2015$721
 $706
 $(1) $1,426
$721
 $706
 $(1) $1,426
Net income
 193
 
 193

 193
 
 193
Other comprehensive income
 
 1
 1

 
 1
 1
Common stock issuances, including dividend reinvestment and employee benefits139
 
 
 139
139
 
 
 139
Common stock dividends
 (114) 
 (114)
 (114) 
 (114)
Balance at October 31, 2016$860
 $785
 $
 $1,645
$860
 $785
 $
 $1,645
Net income
 54
 
 54

 54
 
 54
Dividends to parent
 (27) 
 (27)
 (27) 
 (27)
Balance at December 31, 2016$860
 $812
 $
 $1,672
$860
 $812
 $
 $1,672
Net income

 139
 
 139

 139
 
 139
Transfer of ownership interest of certain equity method investees to parent
 (149) 
 (149)
 (149) 
 (149)
Balance at December 31, 2017$860
 $802
 $
 $1,662
$860
 $802
 $
 $1,662
Net income

 129
 
 129
Contribution from parent300
 
 
 300
Balance at December 31, 2018$1,160
 $931
 $
 $2,091
See Notes to Consolidated Financial Statements




127

FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements
For the Years Ended December 31, 2017, 2016 and 2015

Index to Combined Notes To Consolidated Financial Statements
The notes to the consolidated financial statements are a combined presentation. The following table indicates the registrants to which the notes apply.
 Applicable Notes
Registrant12345678910111213141516171819202122232425
Duke Energy Corporation 
Duke Energy Carolinas, LLC    
Progress Energy, Inc.    
Duke Energy Progress, LLC     
Duke Energy Florida, LLC     
Duke Energy Ohio, Inc.    
Duke Energy Indiana, LLC    
Piedmont Natural Gas Company, Inc.   
 Applicable Notes
Registrant1234567891011121314151617181920212223242526
Duke Energy 
Duke Energy Carolinas   
Progress Energy    
Duke Energy Progress     
Duke Energy Florida     
Duke Energy Ohio     
Duke Energy Indiana    
Piedmont     
Tables within the notes may not sum across due to (i) Progress Energy's consolidation of Duke Energy Progress, Duke Energy Florida and other subsidiaries that are not registrants and (ii) subsidiaries that are not registrants but included in the consolidated Duke Energy balances.
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Nature of Operations and Basis of Consolidation
Duke Energy Corporation (collectively with its subsidiaries, Duke Energy) is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the Federal Energy Regulatory Commission (FERC).FERC and other regulatory agencies listed below. Duke Energy operates in the United States (U.S.)U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas, LLC (Duke Energy Carolinas);Carolinas; Progress Energy, Inc. (Progress Energy);Energy; Duke Energy Progress, LLC (Duke Energy Progress);Progress; Duke Energy Florida, LLC (Duke Energy Florida);Florida; Duke Energy Ohio, Inc. (Duke Energy Ohio);Ohio; Duke Energy Indiana LLC (Duke Energy Indiana) and Piedmont Natural Gas Company, Inc. (Piedmont).Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its seven separate subsidiary registrants (collectively referred to as the Subsidiary Registrants),Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
In October 2016, Duke Energy completed the acquisition of Piedmont. Duke Energy's consolidated financial statements include Piedmont's results of operations and cash flows activity subsequent to the acquisition date. Effective November 1, 2016, Piedmont's fiscal year-end was changed from October 31 to December 31, the year-end of Duke Energy. A transition report was filed on Form 10-Q (Form 10-QT) as of December 31, 2016, for the transition period from November 1, 2016, to December 31, 2016. See Note 2 for additional information regarding the acquisition.
In December 2016, Duke Energy completed an exit of the Latin American market to focus on its domestic regulated business, which was further bolstered by the acquisition of Piedmont. The sale of the International Energy business segment, excluding an equity method investment in National Methanol Company (NMC),NMC, was completed through two transactions including a sale of assets in Brazil to China Three Gorges (Luxembourg) Energy S.à.r.l. (CTG)CTG and a sale of Duke Energy's remaining Latin American assets in Peru, Chile, Ecuador, Guatemala, El Salvador and Argentina to ISQ Enerlam Aggregator, L.P. and Enerlam (UK) Holding Ltd. (I Squared)I Squared (collectively, the International Disposal Group). See Note 2 for additional information on the sale of International Energy.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself.
These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 17 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 8 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting.
Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the North Carolina Utilities Commission (NCUC), Public Service Commission of South Carolina (PSCSC), U.S. Nuclear Regulatory Commission (NRC)NCUC, PSCSC, NRC and FERC.
Progress Energy is a public utility holding company, headquartered in Raleigh, North Carolina, subject to regulation by FERC. Progress Energywhich conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below.
Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the Florida Public Service Commission (FPSC),FPSC, NRC and FERC.



128

PART II
FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is recovered from retail customers and recorded in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky, Inc. (Duke Energy Kentucky).Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the Public Utilities Commission of Ohio (PUCO), Kentucky Public Service Commission (KPSC)PUCO, KPSC and FERC. On April 2, 2015, Duke Energy completed the sale of its nonregulated Midwest generation business, which sold power into wholesale energy markets, to a subsidiary of Dynegy Inc. (Dynegy). For further information about the sale of the Midwest Generation business, refer to Note 2. Substantially all of Duke Energy Ohio's operations that remain after the sale qualify for regulatory accounting.
Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the Indiana Utility Regulatory Commission (IURC)IURC and FERC.
Piedmont is a regulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, Tennessee Public Utility Commission (TPUC)TPUC and FERC.
Certain prior year amounts have been reclassified to conform to the current year presentation.
Other Current Assets and Liabilities
The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5 percent of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2017,2018, or 2016.2017.
 December 31, December 31,
(in millions)Location 2017
 2016
Location 2018
 2017
Duke Energy        
Income taxes receivableCurrent Assets $729
 $330
Accrued compensationCurrent Liabilities $757
 $765
Current Liabilities 793
 757
Duke Energy Carolinas        
Accrued compensationCurrent Liabilities $252
 $248
Current Liabilities $251
 $252
Customer depositsCurrent Liabilities 121
 155
Progress Energy   
  
   
  
Income taxes receivableCurrent Assets $278
 $19
Current Assets $66
 $278
Customer depositsCurrent Liabilities 338
 363
Current Liabilities 345
 338
Duke Energy Progress   
  
   
  
Customer depositsCurrent Liabilities $129
 $141
Current Liabilities $137
 $129
Accrued compensationCurrent Liabilities 132
 135
Current Liabilities 130
 132
Duke Energy Florida   
  
   
  
Customer depositsCurrent Liabilities $208
 $222
Current Liabilities $208
 $208
Other accrued liabilitiesCurrent Liabilities 85
 16
Duke Energy Ohio   
  
   
  
Income taxes receivableCurrent Assets $36
 $16
Current Assets $13
 $36
Customer depositsCurrent Liabilities 46
 62
Current Liabilities 44
 46
Duke Energy Indiana   
  
   
  
Customer depositsCurrent Liabilities $45
 $44
Current Liabilities $47
 $45
Piedmont        
Income taxes receivableCurrent Assets $43
 $9
Current Assets $11
 $43
Discontinued Operations
The results of operations of the International Disposal Group as well as Duke Energy Ohio's nonregulated Midwest Generation business and Duke Energy Retail Sales, LLC (collectively, Midwest Generation Disposal Group) have been classified as Discontinued Operations on Duke Energy's Consolidated Statements of Operations. Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. See Note 2 for additional information.

129

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Amounts Attributable to Controlling Interests
For the years ended December 31, 2018, and 2017, the Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations is entirely attributable to controlling interest. For the year ended December 31, 2017, the Loss2016, $18 million of net income is attributable to noncontrolling interests, which consisted of $7 million included in Income from Continuing Operations and $11 million included in Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statement of Operations is entirely attributable to controlling interest. The following table presents Net Income Attributable to Duke Energy Corporation for continuing operations and discontinued operations for the years ended December 31, 2016, and 2015.Operations.



 Year ended December 31,
(in millions)20162015
Income from Continuing Operations$2,578
$2,654
Income from Continuing Operations Attributable to Noncontrolling Interests7
9
Income from Continuing Operations Attributable to Duke Energy Corporation$2,571
$2,645
(Loss) Income From Discontinued Operations, net of tax$(408)$177
Income from Discontinued Operations Attributable to Noncontrolling Interests, net of tax11
6
(Loss) Income From Discontinued Operations Attributable to Duke Energy Corporation, net of tax$(419)$171
Net Income$2,170
$2,831
Net Income Attributable to Noncontrolling Interests18
15
Net Income Attributable to Duke Energy Corporation$2,152
$2,816
FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Significant Accounting Policies
Use of Estimates
In preparing financial statements that conform to generally accepted accounting principles (GAAP) in the U.S.,GAAP, the Duke Energy Registrants must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Regulatory Accounting
The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or FERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. See Note 4 for further information.
Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery.
When it becomes probable that regulated generation, transmission or distribution assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment charge for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash flows.
Regulated Fuel and Purchased Gas Adjustment Clauses
The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or purchased gas adjustment clauses (PGA).PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Cash, and Cash Equivalents and Restricted Cash
All highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents.
Restricted Cash
The Duke Energy, RegistrantsProgress Energy and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and variable interest entities (VIEs).VIEs. See Note 17 for additional information. Restricted cash balancesamounts are reflectedincluded in Other within Current Assets and in Other within Other Noncurrent Assets on the Consolidated Balance Sheets. At December 31, 2017,The following table presents the components of cash, cash equivalents and 2016, Duke Energy had restricted cash totaling $147 million and $137 million, respectively.

included in the Consolidated Balance Sheets.
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PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 December 31, 2018 December 31, 2017
   Duke
   Duke
 Duke
Progress
Energy
 Duke
Progress
Energy
 Energy
Energy
Florida
 Energy
Energy
Florida
Current Assets       
Cash and cash equivalents$442
$67
$36
 $358
$40
$13
Other141
39
39
 138
40
40
Other Noncurrent Assets       
Other8
6

 9
7

Total cash, cash equivalents and restricted cash$591
$112
$75
 $505
$87
$53
Inventory
Inventory is used for operations and is recorded primarily using the average cost method. Inventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Materials and supplies are recorded as inventory when purchased and subsequently charged to expense or capitalized to property, plant and equipment when installed. Inventory, including excess or obsolete inventory, is written-down to the lower of cost or market value. Once inventory has been written-down, it creates a new cost basis for the inventory that is not subsequently written-up. Provisions for inventory write-offs were not material at December 31, 2017,2018, and 2016.2017. The components of inventory are presented in the tables below.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,293
 $744
 $1,118
 $774
 $343
 $82
 $309
 $2
$2,238
 $731
 $1,049
 $734
 $315
 $84
 $312
 $2
Coal603
 192
 255
 139
 116
 17
 139
 
491
 175
 192
 106
 86
 14
 109
 
Natural gas, oil and other354
 35
 219
 104
 115
 34
 2
 64
355
 42
 218
 114
 103
 28
 1
 68
Total inventory$3,250
 $971
 $1,592
 $1,017
 $574
 $133
 $450
 $66
$3,084
 $948
 $1,459
 $954
 $504
 $126
 $422
 $70
December 31, 2016December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,374
 $767
 $1,167
 $813
 $354
 $84
 $312
 $1
$2,293
 $744
 $1,118
 $774
 $343
 $82
 $309
 $2
Coal774
 251
 314
 148
 166
 19
 190
 
603
 192
 255
 139
 116
 17
 139
 
Natural gas, oil and other374
 37
 236
 115
 121
 34
 2
 65
354
 35
 219
 104
 115
 34
 2
 64
Total inventory$3,522
 $1,055
 $1,717
 $1,076
 $641
 $137
 $504
 $66
$3,250
 $971
 $1,592
 $1,017
 $574
 $133
 $450
 $66
Investments in Debt and Equity Securities
The Duke Energy Registrants classify investments into two categories – tradingin equity securities as FV-NI and available-for-sale.investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on trading securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in earnings.AOCI until realized, except OTTIs that are included in earnings immediately. At the time gains and losses for debt securities are realized, they are reported through net income. For certain investments of regulated operations, such as substantially all of the Nuclear Decommissioning Trust Funds (NDTF),NDTF, realized and unrealized gains and losses (including any other-than-temporary impairments (OTTIs))OTTIs) on available-for-saledebt securities are recorded as a regulatory asset or liability. Otherwise, unrealized gains and losses are included in Accumulated Other Comprehensive Income (AOCI), unless other-than-temporarily impaired. OTTIs for equity securities and theThe credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity. See Note 15 for further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Goodwill and Intangible Assets
Goodwill
Effective with Piedmont's change in fiscal year end to December 31, as discussed above, Piedmont changed the date of its annual impairment testing of goodwill from October 31 to August 31 to align with the other Duke Energy Registrants.
Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be an operatinga business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 11 for further information.
Intangible Assets
Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an amortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced.
Emission allowances permit the holder of the allowance to emit certain gaseous byproducts of fossil fuel combustion, including sulfur dioxide (SOSO2) and nitrogen oxide (NONOX). Allowances are issued by the U.S. Environmental Protection Agency (EPA)EPA at zero cost and may also be bought and sold via third-party transactions. Allowances allocated to or acquired by the Duke Energy Registrants are held primarily for consumption. Carrying amounts for emission allowances are based on the cost to acquire the allowances or, in the case of a business combination, on the fair value assigned in the allocation of the purchase price of the acquired business. Emission allowances are expensed to Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.

131

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Renewable energy certificatesRECs are used to measure compliance with renewable energy standards and are held primarily for consumption. See Note 11 for further information.
Long-Lived Asset Impairments
The Duke Energy Registrants evaluate long-lived assets, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the long-lived asset is not recoverable based on these estimated future undiscounted cash flows, the carrying value of the asset is written-down to its then-current estimated fair value and an impairment charge is recognized.
The Duke Energy Registrants assess fair value of long-lived assets using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are not limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset.
Equity Method Investment Impairments
Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method. Equity method investments are assessed for impairment whenever events or changes in circumstances indicate that the carrying amount of the investment may not be recoverable. If the decline in value is considered to be other than temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment.
Impairment assessments use a discounted cash flow income approach and include consideration of the severity and duration of any decline in the fair value of the investments. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. Key inputs that involve estimates and significant management judgment include cash flow projections, selection of a discount rate, probability weighting of potential outcomes, and whether any decline in value is considered temporary.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Property, Plant and Equipment
Property, plant and equipment are stated at the lower of depreciated historical cost net of any disallowances or fair value, if impaired. The Duke Energy Registrants capitalize all construction-related direct labor and material costs, as well as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction (AFUDC) and Interest Capitalized” for information on capitalized financing costs. Costs of renewals and betterments that extend the useful life of property, plant and equipment are also capitalized. The cost of repairs, replacements and major maintenance projects, which do not extend the useful life or increase the expected output of the asset, are expensed as incurred. Depreciation is generally computed over the estimated useful life of the asset using the composite straight-line method. Depreciation studies are conducted periodically to update composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows.
Years Ended December 31,Years Ended December 31,
2017
 2016
 2015
2018
 2017
 2016
Duke Energy2.8% 2.8% 2.9%3.0% 2.8% 2.8%
Duke Energy Carolinas2.8% 2.8% 2.8%2.8% 2.8% 2.8%
Progress Energy2.6% 2.7% 2.6%2.9% 2.6% 2.7%
Duke Energy Progress2.6% 2.6% 2.6%2.9% 2.6% 2.6%
Duke Energy Florida2.8% 2.8% 2.7%3.0% 2.8% 2.8%
Duke Energy Ohio2.8% 2.6% 2.7%2.8% 2.8% 2.6%
Duke Energy Indiana3.0% 3.1% 3.0%3.3% 3.0% 3.1%
Piedmont(a)
2.3%    2.5% 2.3%  
(a)Piedmont's weighted average depreciation rate was 2.4 percent 2.4 percent, and 2.5 percent for the annualized two months ended December 31, 2016, and for the yearsyear ended October 31, 2016 and 2015, respectively.2016.
In general, when the Duke Energy Registrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in advance of its original expected useful life or is abandoned, the cost of the asset and the corresponding accumulated depreciation is recognized as a separate asset. If the asset is still in operation, the net amount is classified as Generation facilities to be retired, net on the Consolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of long-lived asset impairments above). When it becomes probable an asset will be abandoned, the cost of the asset and accumulated depreciation is reclassified to Regulatory assets on the Consolidated Balance Sheets for amounts recoverable in rates. The carrying value of the asset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, an impairment is recognized to the extent the net book value of the asset exceeds the present value of future revenues discounted at the incremental borrowing rate.
When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body.
See Note 10 for furtheradditional information.
Nuclear Fuel
Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets, except for Duke Energy Florida. Nuclear fuel amounts at Duke Energy Florida were reclassified to Regulatory assets pursuant to the Revised and Restated Stipulation and Settlement Agreement approved in November 2013 among Duke Energy Florida, the Florida Office of Public Counsel (Florida OPC) and other customer advocates (the 2013 Settlement).

132

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Sheets.
Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method.
Allowance for Funds Used During Construction and Interest Capitalized
For regulated operations, the debt and equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets.
AFUDC equity, a permanent difference for income taxes, reduces the effective tax rate (ETR)ETR when capitalized and increases the ETR when depreciated or amortized. See Note 2223 for additional information.
For nonregulated operations, interest is capitalized during the construction phase with an offsetting non-cash credit to Interest Expense on the Consolidated Statements of Operations.
Asset Retirement Obligations
Asset retirement obligations (AROs)AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be recoverable.probable of recovery.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or liability.
Obligations for nuclear decommissioning are based on site-specific cost studies. Duke Energy Carolinas and Duke Energy Progress assume prompt dismantlement of the nuclear facilities after operations are ceased. Duke Energy Florida assumes Crystal River Unit 3 Nuclear Plant (Crystal River Unit 3) will be placed into a safe storage configuration until eventual dismantlement is completed by 2074. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida also assume that spent fuel will be stored on-site until such time that it can be transferred to a yet to be built U.S. Department of Energy (DOE)DOE facility.
Obligations for closure of ash basins are based upon discounted cash flows of estimated costs for site-specific plans, if known, or probability weightings of the potential closure methods if the closure plans are under development and multiple closure options are being considered and evaluated on a site-by-site basis. See Note 9 for additional information.
Revenue Recognition
Duke Energy recognizes revenue as customers obtain control of promised goods and Unbilled Revenue
Revenues on salesservices in an amount that reflects consideration expected in exchange for those goods or services. Generally, the delivery of electricity and natural gas areresults in the transfer of control to customers at the time the commodity is delivered and the amount of revenue recognized when service is provided or the product is delivered. Unbilled revenues are recognized by applying customer billing ratesequal to the amount billed to each customer, including estimated volumes of energy or natural gas delivered butwhen billings have not yet billed. Unbilled revenues can vary significantly from period to period as a result of seasonality, weather, customer usage patterns, customer mix, average price in effect for customer classes, timing of rendering customer bills and meter reading schedules, and the impact of weather normalization or margin decoupling mechanisms.
Unbilled revenues are included within Receivables and Receivables of VIEs on the Consolidated Balance Sheets as shown in the following table.
 December 31,
(in millions)2017
 2016
Duke Energy$944
 $831
Duke Energy Carolinas342
 313
Progress Energy228
 161
Duke Energy Progress143
 102
Duke Energy Florida85
 59
Duke Energy Ohio4
 2
Duke Energy Indiana21
 32
Piedmont86
 77

133

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Additionally, Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, Cinergy Receivables Company LLC (CRC) and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana.occurred. See Note 1718 for further information. These receivables for unbilled revenues are shown in the table below.
 December 31,
(in millions)2017
 2016
Duke Energy Ohio$104
 $97
Duke Energy Indiana132
 123
Allowance for Doubtful Accounts
Allowances for doubtful accounts are presented in the following table.
 December 31,
(in millions)2017
 2016
 2015
Allowance for Doubtful Accounts     
Duke Energy$14
 $14
 $12
Duke Energy Carolinas2
 2
 3
Progress Energy4
 6
 6
Duke Energy Progress1
 4
 4
Duke Energy Florida3
 2
 2
Duke Energy Ohio3
 2
 2
Duke Energy Indiana2
 1
 1
Piedmont(a)
2
 3
  
Allowance for Doubtful Accounts  VIEs  
     
Duke Energy$54
 $54
 $53
Duke Energy Carolinas7
 7
 7
Progress Energy7
 7
 8
Duke Energy Progress5
 5
 5
Duke Energy Florida2
 2
 3
(a)    Piedmont's allowance for doubtful accounts was $2 million as of October 31, 2016, and 2015.
Derivatives and Hedging
Derivative and non-derivative instruments may be used in connection with commodity price and interest rate activities, including swaps, futures, forwards and options. All derivative instruments, except those that qualify for the normal purchase/normal sale (NPNS)NPNS exception, are recorded on the Consolidated Balance Sheets at fair value. Qualifying derivative instruments may be designated as either cash flow hedges or fair value hedges. Other derivative instruments (undesignated contracts) either have not been designated or do not qualify as hedges. The effective portion of the change in the fair value of cash flow hedges is recorded in AOCI. The effective portion of the change in the fair value of a fair value hedge is offset in net income by changes in the hedged item. For activity subject to regulatory accounting, gains and losses on derivative contracts are reflected as regulatory assets or liabilities and not as other comprehensive income or current period income. As a result, changes in fair value of these derivatives have no immediate earnings impact.
Formal documentation, including transaction type and risk management strategy, is maintained for all contracts accounted for as a hedge. At inception and at least every three months thereafter, the hedge contract is assessed to see if it is highly effective in offsetting changes in cash flows or fair values of hedged items.
See Note 14 for further information.
Captive Insurance ReservesNew Accounting Standards
See Note 1 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” for a discussion of the impact of new accounting standards.
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See “Management’s Discussion and Analysis of Results of Operations and Financial Condition – Quantitative and Qualitative Disclosures About Market Risk.”



FINANCIAL STATEMENTS


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Duke Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows 
Consolidated Statements of Changes in Equity
Duke Energy Carolinas
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Progress Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Progress
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Florida
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Ohio
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Indiana
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Piedmont
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity



FINANCIAL STATEMENTS


Combined Notes to Consolidated Financial Statements
Note 1 – Summary of Significant Accounting Policies
Note 2 – Acquisitions and Dispositions
Note 3 – Business Segments
Note 4 – Regulatory Matters
Note 5 – Commitments and Contingencies
Note 6 – Debt and Credit Facilities
Note 7 – Guarantees and Indemnifications
Note 8 – Joint Ownership of Generating and Transmission Facilities
Note 9 – Asset Retirement Obligations
Note 10 – Property, Plant and Equipment
Note 11 – Goodwill and Intangible Assets
Note 12 – Investments in Unconsolidated Affiliates
Note 13 – Related Party Transactions
Note 14 – Derivatives and Hedging
Note 15 – Investments in Debt and Equity Securities
Note 16 – Fair Value Measurements
Note 17 – Variable Interest Entities
Note 18 – Revenue
Note 19 – Common Stock
Note 20 – Severance
Note 21 – Stock-Based Compensation
Note 22 – Employee Benefit Plans
Note 23 – Income Taxes
Note 24 – Other Income and Expenses, Net
Note 25 – Subsequent Events
Note 26 – Quarterly Financial Data (Unaudited)



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of Duke Energy has captive insuranceCorporation
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Corporation and subsidiaries that provide coverage,(the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 2019, expressed an indemnity basis,unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Subsidiary RegistrantsCompany in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as certain third parties,evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS
 Years Ended December 31,
(in millions, except per share amounts)2018
 2017
 2016
Operating Revenues     
Regulated electric$22,097
 $21,177
 $21,221
Regulated natural gas1,773
 1,734
 863
Nonregulated electric and other651
 654
 659
Total operating revenues24,521
 23,565
 22,743
Operating Expenses     
Fuel used in electric generation and purchased power6,831
 6,350
 6,625
Cost of natural gas697
 632
 265
Operation, maintenance and other6,463
 5,944
 6,224
Depreciation and amortization4,074
 3,527
 3,294
Property and other taxes1,280
 1,233
 1,142
Impairment charges402
 282
 18
Total operating expenses19,747
 17,968
 17,568
(Losses) Gains on Sales of Other Assets and Other, net(89) 28
 27
Operating Income4,685
 5,625
 5,202
Other Income and Expenses     
Equity in earnings (losses) of unconsolidated affiliates83
 119
 (15)
Other income and expenses, net399
 508
 463
Total other income and expenses482
 627
 448
Interest Expense2,094
 1,986
 1,916
Income From Continuing Operations Before Income Taxes3,073
 4,266
 3,734
Income Tax Expense From Continuing Operations448
 1,196
 1,156
Income From Continuing Operations2,625
 3,070
 2,578
Income (Loss) From Discontinued Operations, net of tax19
 (6) (408)
Net Income2,644
 3,064
 2,170
Less: Net (Loss) Income Attributable to Noncontrolling Interests(22) 5
 18
Net Income Attributable to Duke Energy Corporation$2,666
 $3,059
 $2,152
      
Earnings Per Share  Basic and Diluted
     
Income from continuing operations attributable to Duke Energy Corporation common stockholders     
Basic$3.73
 $4.37
 $3.71
Diluted$3.73
 $4.37
 $3.71
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders
    
Basic$0.03
 $(0.01) $(0.60)
Diluted$0.03
 $(0.01) $(0.60)
Net income attributable to Duke Energy Corporation common stockholders
    
Basic$3.76
 $4.36
 $3.11
Diluted$3.76
 $4.36
 $3.11
Weighted average shares outstanding     
Basic708
 700
 691
Diluted708
 700
 691
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  
2018
 2017
 2016
Net Income$2,644
 $3,064
 $2,170
Other Comprehensive (Loss) Income, net of tax     
Foreign currency translation adjustments
 
 694
Pension and OPEB adjustments(6) 3
 (11)
Net unrealized (losses) gains on cash flow hedges(10) 2
 17
Reclassification into earnings from cash flow hedges6
 8
 13
Unrealized (losses) gains on available-for-sale securities(3) 13
 2
Other Comprehensive (Loss) Income, net of tax  
(13) 26
 715
Comprehensive Income  
2,631
 3,090
 2,885
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests  
(22) 5
 20
Comprehensive Income Attributable to Duke Energy Corporation  
$2,653
 $3,085
 $2,865

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$442
 $358
Receivables (net of allowance for doubtful accounts of $16 at 2018 and $14 at 2017)962
 779
Receivables of VIEs (net of allowance for doubtful accounts of $55 at 2018 and $54 at 2017)2,172
 1,995
Inventory3,084

3,250
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)2,005
 1,437
Other (includes $162 at 2018 and $214 at 2017 related to VIEs)1,049
 634
Total current assets9,714
 8,453
Property, Plant and Equipment   
Cost134,458
 127,507
Accumulated depreciation and amortization(43,126) (41,537)
Generation facilities to be retired, net362
 421
Net property, plant and equipment91,694
 86,391
Other Noncurrent Assets   
Goodwill19,303
 19,396
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)13,617
 12,442
Nuclear decommissioning trust funds6,720
 7,097
Investments in equity method unconsolidated affiliates1,409
 1,175
Other2,935
 2,960
Total other noncurrent assets43,984
 43,070
Total Assets$145,392
 $137,914
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$3,487
 $3,043
Notes payable and commercial paper3,410
 2,163
Taxes accrued577
 551
Interest accrued559
 525
Current maturities of long-term debt (includes $227 at 2018 and $225 at 2017 related to VIEs)3,406
 3,244
Asset retirement obligations919
 689
Regulatory liabilities598
 402
Other2,085
 1,865
Total current liabilities15,041
 12,482
Long-Term Debt (includes $3,998 at 2018 and $4,306 at 2017 related to VIEs)51,123
 49,035
Other Noncurrent Liabilities   
Deferred income taxes7,806
 6,621
Asset retirement obligations9,548
 9,486
Regulatory liabilities14,834
 15,330
Accrued pension and other post-retirement benefit costs988
 1,103
Investment tax credits568
 539
Other (includes $212 at 2018 and $241 at 2017 related to VIEs)1,650
 1,581
Total other noncurrent liabilities35,394
 34,660
Commitments and Contingencies   
Equity   
Common stock, $0.001 par value, 2 billion shares authorized; 727 million shares outstanding at 2018 and 700 million shares outstanding at 20171
 1
Additional paid-in capital40,795
 38,792
Retained earnings3,113
 3,013
Accumulated other comprehensive loss(92) (67)
Total Duke Energy Corporation stockholders' equity43,817
 41,739
Noncontrolling interests17
 (2)
Total equity43,834
 41,737
Total Liabilities and Equity$145,392
 $137,914

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$2,644
 $3,064
 $2,170
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)4,696
 4,046
 3,880
Equity component of AFUDC(221) (237) (200)
Losses (Gains) on sales of other assets88
 (33) 477
Impairment charges402
 282
 212
Deferred income taxes1,079
 1,433
 900
Equity in (earnings) losses of unconsolidated affiliates(83) (119) 15
Accrued pension and other post-retirement benefit costs61
 8
 21
Contributions to qualified pension plans(141) (19) (155)
Payments for asset retirement obligations(533) (571) (608)
Payment for the disposal of other assets(105) 
 
Other rate case adjustments37
 
 
Provision for rate refunds425
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions22
 18
 34
Receivables(345) (83) (372)
Inventory156
 268
 272
Other current assets(721) (400) (174)
Increase (decrease) in     
Accounts payable479
 (204) 296
Taxes accrued23
 149
 236
Other current liabilities270
 (482) 182
Other assets(1,008) (436) (186)
Other liabilities(39) (60) (137)
Net cash provided by operating activities7,186

6,624

6,863
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(9,389) (8,052) (7,901)
Contributions to equity method investments(416) (414) (307)
Acquisitions, net of cash acquired
 (13) (4,778)
Return of investment capital137
 281
 1
Purchases of debt and equity securities(3,762) (4,071) (5,153)
Proceeds from sales and maturities of debt and equity securities3,747
 4,098
 5,236
Proceeds from the sales of discontinued operations and other assets, net of cash divested41
 
 1,418
Other(418) (271) (44)
Net cash used in investing activities(10,060)
(8,442)
(11,528)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the:     
Issuance of long-term debt5,299
 6,909
 9,238
Issuance of common stock1,838
 
 731
Payments for the redemption of long-term debt(2,906) (2,316) (1,923)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days472
 319
 2,081
Payments for the redemption of short-term debt with original maturities greater than 90 days(282) (272) (2,166)
Notes payable and commercial paper981
 (409) (1,362)
Dividends paid(2,471) (2,450) (2,332)
Other29
 1
 (16)
Net cash provided by financing activities2,960

1,782

4,251
Changes in cash and cash equivalents included in assets held for sale
 
 474
Net increase (decrease) in cash, cash equivalents, and restricted cash86

(36)
60
Cash, cash equivalents, and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents, and restricted cash at end of period$591

$505

$541
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$2,086
 $1,963
 $1,794
Cash (received from) paid for income taxes(266) 4
 229
Significant non-cash transactions:     
Accrued capital expenditures1,112
 1,032
 1,000
Non-cash dividends107
 
 
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         
Duke Energy Corporation Stockholders'
Accumulated Other Comprehensive Loss
      
             Net Unrealized
   Total
    
         Foreign
 Net
 Gains (Losses)
   Duke Energy
    
 Common
   Additional
   Currency
 Losses on
 on Available-
 Pension and
 Corporation
    
 Stock
 Common
 Paid-in
 Retained
 Translation
 Cash Flow
 for-Sale-
 OPEB
 Stockholders'
 Noncontrolling
 Total
(in millions)Shares
 Stock
 Capital
 Earnings
 Adjustments
 Hedges
 Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015688
 $1
 $37,968
 $2,564
 $(692) $(50) $(3) $(61) $39,727
 $44
 $39,771
Net income
 
 
 2,152
 
 
 
 
 2,152
 18
 2,170
Other comprehensive income (loss)(a)

 
 
 
 692
 30
 2
 (11) 713
 2
 715
Common stock issuances, including dividend reinvestment and employee benefits12
 
 773
 
 
 
 
 
 773
 
 773
Common stock dividends
 
 
 (2,332) 
 
 
 
 (2,332) 
 (2,332)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (6) (6)
Other(b)

 
 
 
 
 
 
 
 
 (50) (50)
Balance at December 31, 2016700

$1

$38,741

$2,384

$

$(20)
$(1)
$(72)
$41,033

$8

$41,041
Net income
 
 
 3,059
 
 
 
 
 3,059
 5
 3,064
Other comprehensive income
 
 
 
 
 10
 13
 3
 26
 
 26
Common stock issuances, including dividend reinvestment and employee benefits
 
 51
 
 
 
 
 
 51
 
 51
Common stock dividends
 
 
 (2,450) 
 
 
 
 (2,450) 
 (2,450)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (2) (2)
Other(c)

 
 
 20
 
 
 
 
 20
 (13) 7
Balance at December 31, 2017700

$1

$38,792

$3,013

$

$(10)
$12

$(69)
$41,739

$(2)
$41,737
Net income
 
 
 2,666
 
 
 
 
 2,666
 (22) 2,644
Other comprehensive (loss) income
 
 
 
 
 (4) (3) (6) (13) 
 (13)
Common stock issuances, including dividend reinvestment and employee benefits27
 
 2,003
 
 
 
 
 
 2,003
 
 2,003
Common stock dividends
 
 
 (2,578) 
 
 
 
 (2,578) 
 (2,578)
Distributions to noncontrolling interests in subsidiaries
 
 
 
 
 
 
 
 
 (1) (1)
Other(d)

 
 
 12
 
 
 (12) 
 
 42
 42
Balance at December 31, 2018727
 $1
 $40,795
 $3,113
 $
 $(14) $(3) $(75) $43,817
 $17
 $43,834
(a)Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(b)Noncontrolling Interests amount is primarily related to the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(c)Retained Earnings relates to a cumulative-effect adjustment due to implementation of a new accounting standard related to stock-based compensation and the associated income taxes. See Note 1 to the Consolidated Financial Statements for additional information. Noncontrolling Interests relates to the purchase of remaining interest in REC Solar.
(d)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information. Amount in Noncontrolling Interests primarily relates to tax equity financing activity in the Commercial Renewables segment.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Carolinas, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Carolinas, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a limitedtest basis, forevidence regarding the amounts and disclosures in the financial losses, primarily related to property, workers’ compensationstatements. Our audits also included evaluating the accounting principles used and general liability. Liabilities include provisions for estimated losses incurred but not yet reported (IBNR),significant estimates made by management, as well as estimated provisionsevaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for known claims. IBNR reserve estimates are primarily based upon historical loss experience, industry data and other actuarial assumptions. Reserve estimates are adjusted in future periodsour opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as actual losses differ from experience.the Company's auditor since 1947.
Duke Energy, through its captive insurance entities, also has reinsurance coverage with third parties for certain losses above a per occurrence and/or aggregate retention. Receivables for reinsurance coverage are recognized when realization is deemed probable.



134

PART II
FINANCIAL STATEMENTS
DUKE ENERGY CORPORATION –

DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$7,300
 $7,302
 $7,322
Operating Expenses     
Fuel used in electric generation and purchased power1,821

1,822
 1,797
Operation, maintenance and other2,130

2,021
 2,158
Depreciation and amortization1,201

1,090
 1,075
Property and other taxes295

281
 276
Impairment charges192


 1
Total operating expenses5,639
 5,214
 5,307
(Losses) Gains on Sales of Other Assets and Other, net(1) 1
 (5)
Operating Income1,660
 2,089
 2,010
Other Income and Expenses, net153
 199
 214
Interest Expense439
 422
 424
Income Before Income Taxes1,374
 1,866
 1,800
Income Tax Expense303
 652
 634
Net Income$1,071
 $1,214
 $1,166
Other Comprehensive Income, net of tax     
Reclassification into earnings from cash flow hedges1
 2
 2
Other Comprehensive Income, net of tax1
 2
 2
Comprehensive Income$1,072
 $1,216
 $1,168
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED BALANCE SHEETS
  December 31,
(in millions) 2018
 2017
ASSETS    
Current Assets    
Cash and cash equivalents $33
 $16
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017) 219
 200
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2018 and 2017) 699
 640
Receivables from affiliated companies 182
 95
Inventory 948

971
Regulatory assets 520
 299
Other 72
 19
Total current assets 2,673
 2,240
Property, Plant and Equipment    
Cost 44,741
 42,939
Accumulated depreciation and amortization (15,496) (15,063)
Net property, plant and equipment 29,245
 27,876
Other Noncurrent Assets    
Regulatory assets 3,457
 2,853
Nuclear decommissioning trust funds 3,558
 3,772
Other 1,027
 979
Total other noncurrent assets 8,042
 7,604
Total Assets $39,960
 $37,720
LIABILITIES AND EQUITY    
Current Liabilities    
Accounts payable $988
 $842
Accounts payable to affiliated companies 230
 209
Notes payable to affiliated companies 439
 104
Taxes accrued 171
 234
Interest accrued 102
 108
Current maturities of long-term debt 6
 1,205
Asset retirement obligations 290
 337
Regulatory liabilities 199
 126
Other 571
 486
Total current liabilities 2,996
 3,651
Long-Term Debt 10,633
 8,598
Long-Term Debt Payable to Affiliated Companies 300
 300
Other Noncurrent Liabilities    
Deferred income taxes 3,689
 3,413
Asset retirement obligations 3,659
 3,273
Regulatory liabilities 5,999
 6,231
Accrued pension and other post-retirement benefit costs 99
 95
Investment tax credits 231
 232
Other 671
 566
Total other noncurrent liabilities 14,348
 13,810
Commitments and Contingencies 
 
Equity    
Member's equity 11,689
 11,368
Accumulated other comprehensive loss (6) (7)
Total equity 11,683
 11,361
Total Liabilities and Equity $39,960
 $37,720
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,071
 $1,214
 $1,166
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,487
 1,409
 1,382
Equity component of AFUDC(73) (106) (102)
Losses (Gains) on sales of other assets1
 (1) 5
Impairment charges192
 
 1
Deferred income taxes305
 410
 470
Accrued pension and other post-retirement benefit costs4
 (4) 4
Contributions to qualified pension plans(46) 
 (43)
Payments for asset retirement obligations(230) (271) (287)
Provision for rate refunds182
 
 
(Increase) decrease in
    
Net realized and unrealized mark-to-market and hedging transactions2
 9
 5
Receivables(86) (9) (76)
Receivables from affiliated companies(87) 68
 (56)
Inventory25
 78
 215
Other current assets(161) 7
 67
Increase (decrease) in
    
Accounts payable168
 23
 (69)
Accounts payable to affiliated companies21
 (38) 18
Taxes accrued(65) 86
 187
Other current liabilities89
 (161) 63
Other assets(179) (49) 20
Other liabilities(90) (31) 6
Net cash provided by operating activities2,530
 2,634
 2,976
CASH FLOWS FROM INVESTING ACTIVITIES
    
Capital expenditures(2,706) (2,524) (2,220)
Purchases of debt and equity securities(1,810) (2,124) (2,832)
Proceeds from sales and maturities of debt and equity securities1,810
 2,128
 2,832
Notes receivable from affiliated companies
 66
 97
Other(147) (109) (83)
Net cash used in investing activities(2,853) (2,563) (2,206)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,983
 569
 1,587
Payments for the redemption of long-term debt(1,205) (116) (356)
Notes payable to affiliated companies335
 104
 
Distributions to parent(750) (625) (2,000)
Other(23) (1) 
Net cash provided by (used in) financing activities340
 (69) (769)
Net increase in cash and cash equivalents17
 2
 1
Cash and cash equivalents at beginning of period16
 14
 13
Cash and cash equivalents at end of period$33
 $16
 $14
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$452
 $398
 $393
Cash paid for (received from) income taxes89
 193
 (60)
Significant non-cash transactions:     
Accrued capital expenditures302
 315
 347
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Accumulated Other  
   Comprehensive  
   Loss  
   Net Losses
  
   on Cash
  
 Member's
 Flow
 Total
(in millions)Equity
 Hedges
 Equity
Balance at December 31, 2015$11,617
 $(11) $11,606
Net income1,166
 
 1,166
Other comprehensive income
 2
 2
Distributions to parent(2,000) 
 (2,000)
Other(2) 
 (2)
Balance at December 31, 2016$10,781
 $(9) $10,772
Net income1,214
 
 1,214
Other comprehensive income
 2
 2
Distributions to parent(625) 
 (625)
Other(2) 
 (2)
Balance at December 31, 2017$11,368
 $(7) $11,361
Net income  
1,071
 
 1,071
Other comprehensive income  

 1
 1
Distributions to parent  
(750) 
 (750)
Balance at December 31, 2018$11,689
 $(6) $11,683
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Progress Energy, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Progress Energy, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$10,728
 $9,783
 $9,853
Operating Expenses     
Fuel used in electric generation and purchased power3,976
 3,417
 3,644
Operation, maintenance and other2,613
 2,301
 2,458
Depreciation and amortization1,619
 1,285
 1,213
Property and other taxes529
 503
 487
Impairment charges87
 156
 7
Total operating expenses8,824

7,662

7,809
Gains on Sales of Other Assets and Other, net24
 26
 25
Operating Income1,928

2,147

2,069
Other Income and Expenses, net165
 209
 186
Interest Expense842
 824
 689
Income From Continuing Operations Before Income Taxes1,251

1,532

1,566
Income Tax Expense From Continuing Operations218
 264
 527
Income From Continuing Operations1,033

1,268

1,039
Income From Discontinued Operations, net of tax
 
 2
Net Income1,033

1,268

1,041
Less: Net Income Attributable to Noncontrolling Interests6
 10
 10
Net Income Attributable to Parent$1,027

$1,258

$1,031
      
Net Income  
$1,033

$1,268

$1,041
Other Comprehensive Income, net of tax  
     
Pension and OPEB adjustments5
 4
 1
Net unrealized gain on cash flow hedges6
 5
 
Reclassification into earnings from cash flow hedges
 
 8
Unrealized (losses) gains on available-for-sale securities(1) 4
 1
Other Comprehensive Income, net of tax  
10

13

10
Comprehensive Income  
1,043

1,281

1,051
Less: Comprehensive Income Attributable to Noncontrolling Interests6
 10
 10
Comprehensive Income Attributable to Parent$1,037

$1,271

$1,041

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$67
 $40
Receivables (net of allowance for doubtful accounts of $5 at 2018 and $4 at 2017)220
 123
Receivables of VIEs (net of allowance for doubtful accounts of $8 at 2018 and $7 at 2017)909
 780
Receivables from affiliated companies168
 31
Notes receivable from affiliated companies
 240
Inventory1,459

1,592
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)1,137
 741
Other (includes $39 at 2018 and $44 at 2017 related to VIEs)125
 334
Total current assets4,085
 3,881
Property, Plant and Equipment   
Cost50,260
 47,323
Accumulated depreciation and amortization(16,398) (15,857)
Generation facilities to be retired, net362
 421
Net property, plant and equipment34,224
 31,887
Other Noncurrent Assets   
Goodwill3,655
 3,655
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)6,564
 6,010
Nuclear decommissioning trust funds3,162
 3,324
Other974
 931
Total other noncurrent assets14,355
 13,920
Total Assets$52,664
 $49,688
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$1,172
 $1,006
Accounts payable to affiliated companies360
 251
Notes payable to affiliated companies1,235
 805
Taxes accrued109
 101
Interest accrued246
 212
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)1,672
 771
Asset retirement obligations514
 295
Regulatory liabilities280
 213
Other821
 729
Total current liabilities6,409
 4,383
Long-Term Debt (includes $1,636 at 2018 and $1,689 at 2017 related to VIEs)17,089
 16,916
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes3,941
 3,502
Asset retirement obligations4,897
 5,119
Regulatory liabilities5,049
 5,306
Accrued pension and other post-retirement benefit costs521
 545
Other351
 302
Total other noncurrent liabilities14,759
 14,774
Commitments and Contingencies
 
Equity   
Common stock, $0.01 par value, 100 shares authorized and outstanding at 2018 and 2017
 
Additional paid-in capital9,143
 9,143
Retained earnings5,131
 4,350
Accumulated other comprehensive loss(20) (25)
Total Progress Energy, Inc. stockholder's equity14,254
 13,468
Noncontrolling interests3
 (3)
Total equity14,257
 13,465
Total Liabilities and Equity$52,664

$49,688
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,033
 $1,268
 $1,041
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)1,987
 1,516
 1,435
Equity component of AFUDC(104) (92) (76)
Gains on sales of other assets(24) (28) (34)
Impairment charges87
 156
 7
Deferred income taxes358
 703
 532
Accrued pension and other post-retirement benefit costs24
 (28) (24)
Contributions to qualified pension plans(45) 
 (43)
Payments for asset retirement obligations(230) (248) (270)
Other rate case adjustments37
 
 
Provision for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions18
 
 42
Receivables(207) (89) 7
Receivables from affiliated companies(137) 71
 211
Inventory121
 125
 35
Other current assets(12) (397) 50
Increase (decrease) in     
Accounts payable217
 (260) 252
Accounts payable to affiliated companies109
 (97) 37
Taxes accrued8
 17
 15
Other current liabilities129
 (166) (42)
Other assets(913) (300) (248)
Other liabilities(34) (98) (36)
Net cash provided by operating activities2,544

2,053

2,891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(3,854) (3,152) (3,306)
Asset Acquisitions
 
 (10)
Purchases of debt and equity securities(1,753) (1,806) (2,143)
Proceeds from sales and maturities of debt and equity securities1,769
 1,824
 2,187
Net proceeds from sales of other assets20
 
 
Proceeds from insurance
 7
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies240
 (160) (80)
Other(182) (86) 47
Net cash used in investing activities(3,760) (3,353) (3,227)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,833
 2,118
 2,375
Payments for the redemption of long-term debt(771) (813) (327)
Notes payable to affiliated companies430
 100
 444
Dividends to parent(250) (124) (2,098)
Other(1) (4) (3)
Net cash provided by financing activities1,241

1,277

391
Net increase (decrease) in cash, cash equivalents, and restricted cash25

(23)
55
Cash, cash equivalents, and restricted cash at beginning of period87
 110
 55
Cash, cash equivalents, and restricted cash at end of period$112
 $87
 $110
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$798
 $773
 $673
Cash received from income taxes(348) (146) (187)
Significant non-cash transactions:     
Accrued capital expenditures478
 391
 317
Equitization of certain notes payable to affiliates
 1,047
 
Dividend to parent related to a legal entity restructuring
 547
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
  
  
 Accumulated Other Comprehensive Loss  
  
  
     Net
 Net Unrealized
   Total Progress
    
 Additional
   Losses on
 Gains (Losses)
 Pension and
 Energy, Inc.
    
 Paid-in
 Retained
 Cash Flow
 on Available-for-
 OPEB
 Stockholder's
 Noncontrolling
 Total
(in millions)Capital
 Earnings
 Hedges
 Sale Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015$8,092
 $4,831
 $(31) $
 $(17) $12,875
 $(22) $12,853
Net income
 1,031
 
 
 
 1,031
 10
 1,041
Other comprehensive income
 
 8
 1
 1
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (2,098) 
 
 
 (2,098) 
 (2,098)
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2016$8,094

$3,764

$(23)
$1

$(16)
$11,820

$(13)
$11,807
Net income
 1,258
 
 
 
 1,258
 10
 1,268
Other comprehensive income
 
 5
 4
 4
 13
 
 13
Dividends to parent(a)

 (672) 
 
 
 (672) 
 (672)
Equitization of certain notes payable to affiliates1,047
 
 
 
 
 1,047
 
 1,047
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2017$9,143

$4,350

$(18)
$5

$(12)
$13,468

$(3)
$13,465
Net income
 1,027
 
 
 
 1,027
 6
 1,033
Other comprehensive income (loss)
 
 6
 (1) 5
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (250) 
 
 
 (250) 
 (250)
Other(b)

 4
 
 (5) 
 (1) 1
 
Balance at December 31, 2018$9,143

$5,131

$(12)
$(1)
$(7)
$14,254

$3

$14,257
(a)Includes a $547 million non-cash dividend related to a legal entity restructuring.
(b)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Progress, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Progress, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,699
 $5,129
 $5,277
Operating Expenses     
Fuel used in electric generation and purchased power1,892
 1,609
 1,830
Operation, maintenance and other1,578
 1,439
 1,565
Depreciation and amortization991
 725
 703
Property and other taxes155
 156
 156
Impairment charges33
 19
 1
Total operating expenses4,649
 3,948
 4,255
Gains on Sales of Other Assets and Other, net9
 4
 3
Operating Income1,059
 1,185
 1,025
Other Income and Expenses, net87
 115
 132
Interest Expense319
 293
 257
Income Before Income Taxes827
 1,007
 900
Income Tax Expense160
 292
 301
Net Income and Comprehensive Income$667
 $715
 $599
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$23
 $20
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $1 at 2017)75
 56
Receivables of VIEs (net of allowance for doubtful accounts of $5 at 2018 and 2017)547
 459
Receivables from affiliated companies23
 3
Inventory954

1,017
Regulatory assets703
 352
Other62
 97
Total current assets2,387
 2,004
Property, Plant and Equipment   
Cost31,459
 29,583
Accumulated depreciation and amortization(11,423) (10,903)
Generation facilities to be retired, net362
 421
Net property, plant and equipment20,398
 19,101
Other Noncurrent Assets   
Regulatory assets4,111
 3,507
Nuclear decommissioning trust funds2,503
 2,588
Other612
 599
Total other noncurrent assets7,226
 6,694
Total Assets$30,011
 $27,799
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$660
 $402
Accounts payable to affiliated companies278
 179
Notes payable to affiliated companies294
 240
Taxes accrued53
 64
Interest accrued116
 102
Current maturities of long-term debt603
 3
Asset retirement obligations509
 295
Regulatory liabilities178
 139
Other408
 376
Total current liabilities3,099
 1,800
Long-Term Debt7,451
 7,204
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes2,119
 1,883
Asset retirement obligations4,311
 4,378
Regulatory liabilities3,955
 3,999
Accrued pension and other post-retirement benefit costs237
 248
Investment tax credits142
 143
Other106
 45
Total other noncurrent liabilities10,870
 10,696
Commitments and Contingencies   
Equity   
Member's Equity8,441
 7,949
Total Liabilities and Equity$30,011
 $27,799
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018 2017 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$667
 $715
 $599
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,183
 936
 907
Equity component of AFUDC(57) (47) (50)
Gains on sales of other assets(9) (5) (6)
Impairment charges33
 19
 1
Deferred income taxes236
 384
 384
Accrued pension and other post-retirement benefit costs15
 (20) (32)
Contributions to qualified pension plans(25) 
 (24)
Payments for asset retirement obligations(195) (192) (212)
Other rate case adjustments37
 
 
Provisions for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions5
 (4) 4
Receivables(107) (58) (17)
Receivables from affiliated companies(20) 2
 11
Inventory63
 59
 12
Other current assets(201) (75) 84
Increase (decrease) in     
Accounts payable219
 (230) 181
Accounts payable to affiliated companies99
 (48) 37
Taxes accrued(11) (39) 90
Other current liabilities46
 (131) 114
Other assets(484) (53) (163)
Other liabilities12
 (18) 12
Net cash provided by operating activities1,628
 1,195
 1,932
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(2,220) (1,715) (1,733)
Purchases of debt and equity securities(1,236) (1,249) (1,658)
Proceeds from sales and maturities of debt and equity securities1,206
 1,207
 1,615
Net proceeds from the sales of other assets20
 
 
Proceeds from insurance
 4
 
Notes receivable from affiliated companies
 165
 (165)
Other(115) (55) 26
Net cash used in investing activities(2,345) (1,643) (1,915)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt845
 812
 505
Payments for the redemption of long-term debt(3) (470) (15)
Notes payable to affiliated companies54
 240
 (209)
Distributions to parent(175) (124) (300)
Other(1) (1) (2)
Net cash provided by (used in) financing activities720
 457
 (21)
Net increase (decrease) in cash and cash equivalents3
 9
 (4)
Cash and cash equivalents at beginning of period20
 11
 15
Cash and cash equivalents at end of period$23
 $20
 $11
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$303
 $291
 $248
Cash (received from) paid for income taxes(112) 59
 (287)
Significant non-cash transactions:     
Accrued capital expenditures220
 191
 147
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
 Member's
(in millions)Equity
Balance at December 31, 2015$7,059
Net income599
Distribution to parent(300)
Balance at December 31, 2016$7,358
Net income715
Distribution to parent(124)
Balance at December 31, 2017$7,949
Net income667
Distribution to parent(175)
Balance at December 31, 2018$8,441
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Florida, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Florida, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2001.




FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,021
 $4,646
 $4,568
Operating Expenses     
Fuel used in electric generation and purchased power2,085
 1,808
 1,814
Operation, maintenance and other1,025
 853
 884
Depreciation and amortization628
 560
 509
Property and other taxes374
 347
 333
Impairment charges54
 138
 6
Total operating expenses4,166
 3,706
 3,546
Gains on Sales of Other Assets and Other, net1
 1
 
Operating Income856
 941
 1,022
Other Income and Expenses, net86
 96
 63
Interest Expense287
 279
 212
Income Before Income Taxes655
 758
 873
Income Tax Expense101
 46
 322
Net Income$554
 $712
 $551
Other Comprehensive (Loss) Income, net of tax     
Unrealized (losses) gains on available-for-sale securities(1) 3
 1
Other Comprehensive (Loss) Income, net of tax(1) 3
 1
Comprehensive Income$553
 $715
 $552
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$36
 $13
Receivables (net of allowance for doubtful accounts of $3 at 2018 and 2017)143
 65
Receivables of VIEs (net of allowance for doubtful accounts of $3 at 2018 and $2 at 2017)362
 321
Receivables from affiliated companies28
 2
Notes receivable from affiliated companies
 313
Inventory504

574
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)434
 389
Other (includes $39 at 2018 and $40 at 2017 related to VIEs)46
 86
Total current assets1,553
 1,763
Property, Plant and Equipment   
Cost18,792
 17,730
Accumulated depreciation and amortization(4,968) (4,947)
Net property, plant and equipment13,824
 12,783
Other Noncurrent Assets   
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)2,454
 2,503
Nuclear decommissioning trust funds659
 736
Other311
 284
Total other noncurrent assets3,424
 3,523
Total Assets$18,801
 $18,069
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$511
 $602
Accounts payable to affiliated companies91
 74
Notes payable to affiliated companies108
 
Taxes accrued74
 34
Interest accrued75
 56
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)270
 768
Asset retirement obligations5
 
Regulatory liabilities102
 74
Other406
 334
Total current liabilities1,642
 1,942
Long-Term Debt (includes $1,336 at 2018 and $1,389 at 2017 related to VIEs)7,051
 6,327
Other Noncurrent Liabilities   
Deferred income taxes1,986
 1,761
Asset retirement obligations586
 742
Regulatory liabilities1,094
 1,307
Accrued pension and other post-retirement benefit costs254
 264
Other93
 108
Total other noncurrent liabilities4,013
 4,182
Commitments and Contingencies   
Equity   
Member's equity6,097
 5,614
Accumulated other comprehensive income(2) 4
Total equity6,095
 5,618
Total Liabilities and Equity$18,801
 $18,069
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$554
 $712
 $551
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion793
 570
 516
Equity component of AFUDC(47) (45) (26)
Gains on sales of other assets(1) (1) 
Impairment charges54
 138
 6
Deferred income taxes159
 245
 224
Accrued pension and other post-retirement benefit costs5
 (13) 2
Contributions to qualified pension plans(20) 
 (20)
Payments for asset retirement obligations(35) (56) (58)
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions7
 5
 38
Receivables(100) (38) 23
Receivables from affiliated companies(26) 
 21
Inventory58
 66
 23
Other current assets59
 (138) (86)
Increase (decrease) in     
Accounts payable(1) (32) 71
Accounts payable to affiliated companies17
 (51) 9
Taxes accrued40
 1
 (117)
Other current liabilities82
 (37) (149)
Other assets(428) (229) (84)
Other liabilities(61) (82) (53)
Net cash provided by operating activities1,109
 1,015
 891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(1,634) (1,437) (1,583)
Purchases of debt and equity securities(517) (557) (485)
Proceeds from sales and maturities of debt and equity securities563
 617
 572
Proceeds from insurance
 4
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies313
 (313) 
Other(65) (31) 21
Net cash used in investing activities(1,340) (1,697) (1,397)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt988
 1,306
 1,870
Payments for the redemption of long-term debt(769) (342) (12)
Notes payable to affiliated companies108
 (297) (516)
Distribution to parent(75) 
 (775)
Other1
 (1) 
Net cash provided by financing activities253
 666
 567
Net increase (decrease) in cash, cash equivalents, and restricted cash22
 (16) 61
Cash, cash equivalents, and restricted cash at beginning of period53
 69
 8
Cash, cash equivalents, and restricted cash at end of period$75
 $53
 $69
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$270
 $274
 $208
Cash (received from) paid for income taxes(120) (197) 216
Significant non-cash transactions:     
Accrued capital expenditures258
 199
 170
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
    Accumulated 
    Other 
    Comprehensive 
    Income (Loss) 
    Net Unrealized
  
    Gains (Losses) on
  
  Member's
 Available-for-
 Total
(in millions) Equity
 Sale Securities
 Equity
Balance at December 31, 2015 $5,121
 $
 $5,121
Net income 551
 
 551
Other comprehensive income 
 1
 1
Distribution to parent (775) 
 (775)
Other 2
 
 2
Balance at December 31, 2016 $4,899
 $1
 $4,900
Net income 712
 
 712
Other comprehensive income 
 3
 3
Other 3
 
 3
Balance at December 31, 2017 $5,614
 $4
 $5,618
Net income 554
 
 554
Other comprehensive loss 
 (1) (1)
Distribution to parent (75) 
 (75)
Other(a)
 4
 (5) (1)
Balance at December 31, 2018 $6,097
 $(2) $6,095
(a)Amounts represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Ohio, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Ohio, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  2018
 2017
 2016
Operating Revenues     
Regulated electric$1,450
 $1,373
 $1,410
Regulated natural gas506
 508
 503
Nonregulated electric and other1
 42
 31
Total operating revenues1,957
 1,923
 1,944
Operating Expenses  
     
Fuel used in electric generation and purchased power – regulated412
 369
 442
Fuel used in electric generation and purchased power – nonregulated
 58
 51
Cost of natural gas  113
 107
 103
Operation, maintenance and other480
 530
 514
Depreciation and amortization268
 261
 233
Property and other taxes290
 278
 258
Impairment charges
 1
 
Total operating expenses1,563
 1,604
 1,601
(Losses) Gains on Sales of Other Assets and Other, net(106) 1
 2
Operating Income288
 320
 345
Other Income and Expenses, net23
 23
 11
Interest Expense92
 91
 86
Income From Continuing Operations Before Income Taxes219
 252
 270
Income Tax Expense From Continuing Operations43
 59
 78
Income From Continuing Operations176
 193
 192
(Loss) Income From Discontinued Operations, net of tax
 (1) 36
Net Income and Comprehensive Income$176
 $192
 $228
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$21
 $12
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $3 at 2017)102
 68
Receivables from affiliated companies114
 133
Notes receivable from affiliated companies
 14
Inventory126

133
Regulatory assets33
 49
Other24
 39
Total current assets420
 448
Property, Plant and Equipment   
Cost9,360
 8,732
Accumulated depreciation and amortization(2,717) (2,691)
Net property, plant and equipment6,643
 6,041
Other Noncurrent Assets   
Goodwill920
 920
Regulatory assets531
 445
Other41
 21
Total other noncurrent assets1,492
 1,386
Total Assets$8,555
 $7,875
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$316
 $313
Accounts payable to affiliated companies78
 62
Notes payable to affiliated companies274
 29
Taxes accrued202
 190
Interest accrued22
 21
Current maturities of long-term debt551
 3
Asset retirement obligations6
 3
Regulatory liabilities57
 36
Other74
 71
Total current liabilities1,580
 728
Long-Term Debt1,589
 2,039
Long-Term Debt Payable to Affiliated Companies25
 25
Other Noncurrent Liabilities   
Deferred income taxes817
 781
Asset retirement obligations87
 81
Regulatory liabilities840
 891
Accrued pension and other post-retirement benefit costs79
 59
Other93
 108
Total other noncurrent liabilities1,916
 1,920
Commitments and Contingencies   
Equity   
Common stock, $8.50 par value, 120 million shares authorized; 90 million shares outstanding at 2018 and 2017762
 762
Additional paid-in capital2,776
 2,670
Accumulated deficit(93) (269)
Total equity3,445
 3,163
Total Liabilities and Equity$8,555
 $7,875
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$176
 $192
 $228
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion271
 265
 237
Equity component of AFUDC(11) (11) (6)
Losses (Gains) on sales of other assets106
 (1) (2)
Impairment charges
 1
 
Deferred income taxes25
 90
 55
Accrued pension and other post-retirement benefit costs3
 2
 6
Contributions to qualified pension plans
 (4) (5)
Payments for asset retirement obligations(3) (7) (5)
Provision for rate refunds24
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions
 
 (2)
Receivables(33) 2
 (4)
Receivables from affiliated companies19
 (4) (36)
Inventory7
 6
 (32)
Other current assets16
 (22) 79
Increase (decrease) in     
Accounts payable(19) 12
 19
Accounts payable to affiliated companies16
 (1) 10
Taxes accrued12
 11
 3
Other current liabilities14
 (19) (54)
Other assets(26) (28) (35)
Other liabilities(27) (5) (31)
Net cash provided by operating activities570
 479
 425
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(827) (686) (476)
Notes receivable from affiliated companies14
 80
 (94)
Other(89) (41) (30)
Net cash used in investing activities(902) (647) (600)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt99
 182
 341
Payments for the redemption of long-term debt(3) (2) (53)
Notes payable to affiliated companies245
 13
 (87)
Dividends to parent
 (25) (25)
Other
 (1) (2)
Net cash provided by financing activities341
 167
 174
Net increase (decrease) in cash and cash equivalents9
 (1) (1)
Cash and cash equivalents at beginning of period12
 13
 14
Cash and cash equivalents at end of period$21
 $12
 $13
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$87
 $85
 $81
Cash received from income taxes(6) (8) (46)
Significant non-cash transactions:     
Accrued capital expenditures95
 82
 83
Non-cash equity contribution from parent106
 
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Additional
    
 Common
 Paid-in
 Accumulated
 Total
(in millions)Stock
 Capital
 Deficit
 Equity
Balance at December 31, 2015$762
 $2,720
 $(698) $2,784
Net income
 
 228
 228
Contribution from parent
 
 9
 9
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2016$762
 $2,695
 $(461) $2,996
Net income
 
 192
 192
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2017$762

$2,670

$(269)
$3,163
Net income
 
 176
 176
Contribution from parent
 106
 
 106
Balance at December 31, 2018$762
 $2,776
 $(93) $3,445
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Indiana, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Indiana, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC– LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$3,059
 $3,047
 $2,958
Operating Expenses     
Fuel used in electric generation and purchased power1,000

966
 909
Operation, maintenance and other788

743
 727
Depreciation and amortization520

458
 496
Property and other taxes78

76
 58
Impairment charges30

18
 8
Total operating expenses2,416
 2,261
 2,198
Gains on Sales of Other Assets and Other, net
 
 1
Operating Income643
 786
 761
Other Income and Expenses, net45
 47
 26
Interest Expense167
 178
 181
Income Before Income Taxes521

655

606
Income Tax Expense128
 301
 225
Net Income$393

$354

$381
Other Comprehensive Loss, net of tax     
Reclassification into earnings from cash flow hedges
 
 (1)
Comprehensive Income$393

$354

$380
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$24
 $9
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)52
 57
Receivables from affiliated companies122
 125
Inventory422

450
Regulatory assets175
 165
Other35
 30
Total current assets830
 836
Property, Plant and Equipment   
Cost15,443
 14,948
Accumulated depreciation and amortization(4,914) (4,662)
Net property, plant and equipment10,529
 10,286
Other Noncurrent Assets  
Regulatory assets982
 978
Other194
 189
Total other noncurrent assets1,176
 1,167
Total Assets$12,535
 $12,289
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$200
 $196
Accounts payable to affiliated companies83
 78
Notes payable to affiliated companies167
 161
Taxes accrued43
 95
Interest accrued58
 57
Current maturities of long-term debt63
 3
Asset retirement obligations109
 54
Regulatory liabilities25
 24
Other107
 104
Total current liabilities855
 772
Long-Term Debt3,569
 3,630
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes1,009
 925
Asset retirement obligations613
 727
Regulatory liabilities1,722
 1,723
Accrued pension and other post-retirement benefit costs115
 76
Investment tax credits147
 147
Other16
 18
Total other noncurrent liabilities3,622
 3,616
Commitments and Contingencies   
Equity   
Member's Equity4,339
 4,121
Total Liabilities and Equity$12,535
 $12,289
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$393
 $354
 $381
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization, and accretion524
 462
 499
Equity component of AFUDC(32) (28) (16)
Impairment charges30
 18
 8
Deferred income taxes95
 152
 213
Accrued pension and other post-retirement benefit costs7
 2
 8
Contributions to qualified pension plans(8) 
 (9)
Payments for asset retirement obligations(69) (45) (46)
Provision for rate refunds53
 
 
(Increase) decrease in     
Receivables7
 59
 (2)
Receivables from affiliated companies3
 (11) (43)
Inventory28
 54
 66
Other current assets(25) 28
 (67)
Increase (decrease) in     
Accounts payable37
 (86) 8
Accounts payable to affiliated companies5
 4
 (9)
Taxes accrued(52) 64
 (4)
Other current liabilities14
 (10) (81)
Other assets29
 (28) (27)
Other liabilities(33) (20) (8)
Net cash provided by operating activities1,006
 969
 871
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(832) (840) (755)
Purchases of debt and equity securities(48) (20) (14)
Proceeds from sales and maturities of debt and equity securities44
 7
 11
Proceeds from the sales of other assets15
 
 
Notes receivable from affiliated companies
 86
 (3)
Other3
 (65) 32
Net cash used in investing activities(818) (832) (729)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt
 
 494
Payments for the redemption of long-term debt(3) (5) (478)
Notes payable to affiliated companies6
 161
 
Distributions to parent(175) (300) (149)
Other(1) (1) (1)
Net cash used in financing activities(173) (145) (134)
Net increase (decrease) in cash and cash equivalents15
 (8) 8
Cash and cash equivalents at beginning of period9
 17
 9
Cash and cash equivalents at end of period$24
 $9
 $17
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$162
 $179
 $171
Cash paid for (received from) income taxes75
 117
 (7)
Significant non-cash transactions:     
Accrued capital expenditures88
 125
 99
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         Accumulated  
         Other  
         Comprehensive  
         Income  
   Additional
     Net Gains on
  
 Common
 Paid-in
 Retained
 Member's
 Cash Flow
 Total
(in millions)Stock
 Capital
 Earnings
 Equity
 Hedges
 Equity
Balance at December 31, 2015$1
 $1,384
 $2,450
 $
 $1
 $3,836
Net income
 
 
 381
 
 381
Other comprehensive loss
 
 
 
 (1) (1)
Distributions to parent
 
 
 (149) 
 (149)
Transfer to Member's Equity(1) (1,384) (2,450) 3,835
 
 
Balance at December 31, 2016$

$

$

$4,067
 $

$4,067
Net income
 
 
 354
 
 354
Distributions to parent
 
 
 (300) 
 (300)
Balance at December 31, 2017$

$

$

$4,121
 $

$4,121
Net income
 
 
 393
 
 393
Distributions to parent
 
 
 (175) 
 (175)
Balance at December 31, 2018$

$

$

$4,339
 $

$4,339
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Piedmont Natural Gas Company, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Piedmont Natural Gas Company, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31 2016, and for the two months ended December 31, 2016 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31, 2016, and for the two months ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Emphasis of Matter
As discussed in Note 1 to the financial statements, effective for fiscal year 2016, the Company changed its fiscal year end from October 31 to December 31. This resulted in a two-month transition period beginning November 1, 2016 through December 31, 2016.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1951.




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31, Two Months Ended
December 31,
 Year Ended
October 31,
(in millions)2018
 2017
 2016
 2016
Operating Revenues       
Regulated natural gas$1,365
 $1,319
 $320
 $1,139
Nonregulated natural gas and other10
 9
 2
 10
Total operating revenues1,375
 1,328
 322
 1,149
Operating Expenses       
Cost of natural gas584
 524
 144
 391
Operation, maintenance and other357
 304
 50
 353
Depreciation and amortization159
 148
 23
 137
Property and other taxes49
 48
 7
 43
Impairment charges
 7
 
 
Total operating expenses1,149
 1,031

224
 924
Operating Income226
 297

98
 225
Equity in earnings (losses) of unconsolidated affiliates7
 (6) 2
 29
Gain on sale of unconsolidated affiliates
 
 
 133
Other income and expense, net14
 (11) (2) (1)
Total other income and expenses21
 (17)

 161
Interest Expense81
 79
 12
 69
Income Before Income Taxes166
 201

86
 317
Income Tax Expense37
 62
 32
 124
Net Income$129
 $139

$54
 $193
Other Comprehensive Income, net of tax       
Unrealized loss from hedging activities of equity method investments
 
 
 (3)
Reclassification into earnings from hedging activities of equity method investments
 
 
 4
Other Comprehensive Income, net of tax
 
 
 1
Comprehensive Income$129
 $139
 $54
 $194
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$
 $19
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)266
 275
Receivables from affiliated companies22
 7
Inventory70
 66
Regulatory assets54
 95
Other19
 52
Total current assets431
 514
Property, Plant and Equipment   
Cost7,486
 6,725
Accumulated depreciation and amortization(1,575) (1,479)
Net property, plant and equipment5,911
 5,246
Other Noncurrent Assets   
Goodwill49
 49
Regulatory assets303
 283
Investments in equity method unconsolidated affiliates64
 61
Other52
 65
Total other noncurrent assets468
 458
Total Assets$6,810
 $6,218
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$203
 $125
Accounts payable to affiliated companies38
 13
Notes payable to affiliated companies198
 364
Taxes accrued84
 19
Interest accrued31
 31
Current maturities of long-term debt350
 250
Regulatory liabilities37
 3
Other58
 69
Total current liabilities999
 874
Long-Term Debt1,788
 1,787
Other Noncurrent Liabilities   
Deferred income taxes551
 564
Asset retirement obligations19
 15
Regulatory liabilities1,181
 1,141
Accrued pension and other post-retirement benefit costs4
 5
Other177
 170
Total other noncurrent liabilities1,932
 1,895
Commitments and Contingencies   
Equity   
Common stock, no par value: 100 shares authorized and outstanding at 2018 and 20171,160
 860
Retained earnings931
 802
Total equity2,091
 1,662
Total Liabilities and Equity$6,810
 $6,218

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31, Two Months Ended December 31, Year Ended October 31,
(in millions)2018
 2017
 2016
 2016
CASH FLOWS FROM OPERATING ACTIVITIES       
Net income$129
 $139
 $54
 $193
Adjustments to reconcile net income to net cash provided by operating activities:       
Depreciation and amortization161
 151
 25
 148
Gains on sales of other assets
 
 
 (133)
Impairment charges
 7
 
 
Deferred income taxes(31) 154
 26
 74
Equity in (earnings) losses from unconsolidated affiliates(7) 6
 (2) (29)
Accrued pension and other post-retirement benefit costs(4) 23
 5
 3
Contributions to qualified pension plans
 (11) (10) (14)
Payments for asset retirement obligations
 
 (1) (6)
Provision for rate refunds43
 
 
 
(Increase) decrease in       
Receivables7
 (40) (157) 12
Receivables from affiliated companies(15) 
 
 (7)
Inventory(4) 
 (11) 14
Other current assets71
 (20) 8
 (98)
Increase (decrease) in       
Accounts payable15
 (13) 35
 6
Accounts payable to affiliated companies25
 5
 4
 6
Taxes accrued65
 (48) (2) 38
Other current liabilities21
 (9) 2
 28
Other assets6
 7
 (7) (91)
Other liabilities(4) (2) 5
 180
Net cash provided by (used in) operating activities478
 349
 (26) 324
CASH FLOWS FROM INVESTING ACTIVITIES       
Capital expenditures(721) (585) (113) (522)
Contributions to equity method investments
 (12) (12) (47)
Proceeds from the sales of other assets
 
 
 175
Other(10) (6) 1
 5
Net cash used in investing activities(731) (603) (124) (389)
CASH FLOWS FROM FINANCING ACTIVITIES       
Proceeds from the:       
Issuance of long-term debt100
 250
 
 295
Issuance of common stock
 
 
 122
Payments for the redemption of long-term debt
 (35) 
 (40)
Notes payable and commercial paper
 (330) 185
 (195)
Notes payable to affiliated companies(166) 364
 
 
Capital contribution from parent300
 
 
 
Dividends to parent
 
 (27) 
Dividends paid
 
 
 (114)
Other
 (1) 
 
Net cash provided by financing activities234
 248
 158
 68
Net (decrease) increase in cash and cash equivalents(19) (6) 8
 3
Cash and cash equivalents at beginning of period19
 25
 17
 14
Cash and cash equivalents at end of period$
 $19
 $25
 $17
Supplemental Disclosures:       
Cash paid for interest, net of amount capitalized$79
 $78
 $11
 $81
Cash received from income taxes(16) (12) 
 (25)
Significant non-cash transactions:       
Accrued capital expenditures96
 34
 48
 63
Transfer of ownership interest of certain equity method investees to parent
 149
 
 

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
     Accumulated  
     Other  
       Comprehensive   
     Income (Loss)  
     Net Gain on
  
     Hedging Activities
  
 Common
 Retained
 of Unconsolidated
 Total
(in millions)Stock
 Earnings
 Affiliates
 Equity
Balance at October 31, 2015$721
 $706
 $(1) $1,426
Net income  
 193
 
 193
Other comprehensive income
 
 1
 1
Common stock issuances, including dividend reinvestment and employee benefits139
 
 
 139
Common stock dividends
 (114) 
 (114)
Balance at October 31, 2016$860
 $785
 $
 $1,645
Net income
 54
 
 54
Dividends to parent
 (27) 
 (27)
Balance at December 31, 2016$860
 $812
 $
 $1,672
Net income
 139
 
 139
Transfer of ownership interest of certain equity method investees to parent
 (149) 
 (149)
Balance at December 31, 2017$860
 $802
 $
 $1,662
Net income  

 129
 
 129
Contribution from parent300
 
 
 300
Balance at December 31, 2018$1,160
 $931
 $
 $2,091
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Index to Combined Notes To Consolidated Financial Statements – (Continued)
The notes to the consolidated financial statements are a combined presentation. The following table indicates the registrants to which the notes apply.
 Applicable Notes
Registrant1234567891011121314151617181920212223242526
Duke Energy 
Duke Energy Carolinas   
Progress Energy    
Duke Energy Progress     
Duke Energy Florida     
Duke Energy Ohio     
Duke Energy Indiana    
Piedmont     
Tables within the notes may not sum across due to (i) Progress Energy's consolidation of Duke Energy Progress, Duke Energy Florida and other subsidiaries that are not registrants and (ii) subsidiaries that are not registrants but included in the consolidated Duke Energy balances.
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Nature of Operations and Basis of Consolidation
Duke Energy is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the FERC and other regulatory agencies listed below. Duke Energy operates in the U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas; Progress Energy; Duke Energy Progress; Duke Energy Florida; Duke Energy Ohio; Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
In October 2016, Duke Energy completed the acquisition of Piedmont. Duke Energy's consolidated financial statements include Piedmont's results of operations and cash flows activity subsequent to the acquisition date. Effective November 1, 2016, Piedmont's fiscal year-end was changed from October 31 to December 31, the year-end of Duke Energy. A transition report was filed on Form 10-Q (Form 10-QT) for the transition period from November 1, 2016, to December 31, 2016. See Note 2 for additional information regarding the acquisition.
In December 2016, Duke Energy completed an exit of the Latin American market to focus on its domestic regulated business, which was further bolstered by the acquisition of Piedmont. The sale of the International Energy business segment, excluding an equity method investment in NMC, was completed through two transactions including a sale of assets in Brazil to CTG and a sale of Duke Energy's remaining Latin American assets in Peru, Chile, Ecuador, Guatemala, El Salvador and Argentina to I Squared (collectively, the International Disposal Group). See Note 2 for additional information on the sale of International Energy.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself.
These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 17 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 8 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting.
Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Progress Energy is a public utility holding company, which conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below.
Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Unamortized Debt Premium, Discount and Expense
Premiums, discounts and expenses incurred with the issuance of outstanding long-term debt are amortized over the term of the debt issue. The gain or loss on extinguishment associated with refinancing higher-cost debt obligationsDuke Energy Ohio is a regulated public utility primarily engaged in the regulated operationstransmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is amortized. Amortization expense isrecovered from retail customers and recorded as Interest Expense in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is reflectedsubject to the regulatory provisions of the PUCO, KPSC and FERC.
Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC.
Piedmont is a regulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC and FERC.
Certain prior year amounts have been reclassified to conform to the current year presentation.
Other Current Assets and Liabilities
The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5 percent of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2018, or 2017.
   December 31,
(in millions)Location 2018
 2017
Duke Energy     
Income taxes receivableCurrent Assets $729
 $330
Accrued compensationCurrent Liabilities 793
 757
Duke Energy Carolinas     
Accrued compensationCurrent Liabilities $251
 $252
Progress Energy   
  
Income taxes receivableCurrent Assets $66
 $278
Customer depositsCurrent Liabilities 345
 338
Duke Energy Progress   
  
Customer depositsCurrent Liabilities $137
 $129
Accrued compensationCurrent Liabilities 130
 132
Duke Energy Florida   
  
Customer depositsCurrent Liabilities $208
 $208
Other accrued liabilitiesCurrent Liabilities 85
 16
Duke Energy Ohio   
  
Income taxes receivableCurrent Assets $13
 $36
Customer depositsCurrent Liabilities 44
 46
Duke Energy Indiana   
  
Customer depositsCurrent Liabilities $47
 $45
Piedmont     
Income taxes receivableCurrent Assets $11
 $43
Discontinued Operations
The results of operations of the International Disposal Group have been classified as Depreciation, amortizationDiscontinued Operations on Duke Energy's Consolidated Statements of Operations. Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. See Note 2 for additional information.
Amounts Attributable to Controlling Interests
For the years ended December 31, 2018, and accretion within Net2017, the Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations is entirely attributable to controlling interest. For the year ended December 31, 2016, $18 million of net income is attributable to noncontrolling interests, which consisted of $7 million included in Income from Continuing Operations and $11 million included in Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statement of Operations.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Significant Accounting Policies
Use of Estimates
In preparing financial statements that conform to GAAP, the Duke Energy Registrants must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Regulatory Accounting
The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or FERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. See Note 4 for further information.
Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery.
When it becomes probable that regulated generation, transmission or distribution assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment charge for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash provided by operating activitiesflows.
The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Cash, Flows.Cash Equivalents and Restricted Cash
Premiums, discountsAll highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents. Duke Energy, Progress Energy and expensesDuke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Note 17 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets.
 December 31, 2018 December 31, 2017
   Duke
   Duke
 Duke
Progress
Energy
 Duke
Progress
Energy
 Energy
Energy
Florida
 Energy
Energy
Florida
Current Assets       
Cash and cash equivalents$442
$67
$36
 $358
$40
$13
Other141
39
39
 138
40
40
Other Noncurrent Assets       
Other8
6

 9
7

Total cash, cash equivalents and restricted cash$591
$112
$75
 $505
$87
$53
Inventory
Inventory is used for operations and is recorded primarily using the average cost method. Inventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Materials and supplies are recorded as inventory when purchased and subsequently charged to expense or capitalized to property, plant and equipment when installed. Inventory, including excess or obsolete inventory, is written-down to the lower of cost or market value. Once inventory has been written-down, it creates a new cost basis for the inventory that is not subsequently written-up. Provisions for inventory write-offs were not material at December 31, 2018, and 2017. The components of inventory are presented in the tables below.
 December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,238
 $731
 $1,049
 $734
 $315
 $84
 $312
 $2
Coal491
 175
 192
 106
 86
 14
 109
 
Natural gas, oil and other355
 42
 218
 114
 103
 28
 1
 68
Total inventory$3,084
 $948
 $1,459
 $954
 $504
 $126
 $422
 $70
 December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,293
 $744
 $1,118
 $774
 $343
 $82
 $309
 $2
Coal603
 192
 255
 139
 116
 17
 139
 
Natural gas, oil and other354
 35
 219
 104
 115
 34
 2
 64
Total inventory$3,250
 $971
 $1,592
 $1,017
 $574
 $133
 $450
 $66
Investments in Debt and Equity Securities
The Duke Energy Registrants classify investments in equity securities as FV-NI and investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in AOCI until realized, except OTTIs that are included in earnings immediately. At the time gains and losses for debt securities are realized, they are reported through net income. For certain investments of regulated operations, such as substantially all of the NDTF, realized and unrealized gains and losses (including any OTTIs) on debt securities are recorded as a regulatory asset or liability. The credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity. See Note 15 for further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Goodwill and Intangible Assets
Goodwill
Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be a business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 11 for further information.
Intangible Assets
Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an adjustmentamortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced.
Emission allowances permit the holder of the allowance to emit certain gaseous byproducts of fossil fuel combustion, including SO2 and NOX. Allowances are issued by the EPA at zero cost and may also be bought and sold via third-party transactions. Allowances allocated to or acquired by the Duke Energy Registrants are held primarily for consumption. Carrying amounts for emission allowances are based on the cost to acquire the allowances or, in the case of a business combination, on the fair value assigned in the allocation of the purchase price of the acquired business. Emission allowances are expensed to Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.
RECs are used to measure compliance with renewable energy standards and are held primarily for consumption. See Note 11 for further information.
Long-Lived Asset Impairments
The Duke Energy Registrants evaluate long-lived assets, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the debt amount and included in Long-Term Debtlong-lived asset is not recoverable based on these estimated future undiscounted cash flows, the Consolidated Balance Sheets presented.
Loss Contingencies and Environmental Liabilities
Contingent losses are recorded when it is probable a loss has occurred and can be reasonably estimated. When a rangecarrying value of the probable loss existsasset is written-down to its then-current estimated fair value and noan impairment charge is recognized.
The Duke Energy Registrants assess fair value of long-lived assets using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are not limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset.
Equity Method Investment Impairments
Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method. Equity method investments are assessed for impairment whenever events or changes in circumstances indicate that the carrying amount withinof the rangeinvestment may not be recoverable. If the decline in value is considered to be other than temporary, the investment is written down to its estimated fair value, which establishes a better estimate than any other amount, the minimum amountnew cost basis in the range is recorded. Unless otherwise required by GAAP, legal fees are expensed as incurred.investment.
Environmental liabilities are recorded on an undiscounted basis when environmental remediation or other liabilities become probableImpairment assessments use a discounted cash flow income approach and can be reasonably estimated. Environmental expenditures related to past operations that do not generate current or future revenues are expensed. Environmental expenditures related to operations that generate current or future revenues are expensed or capitalized, as appropriate. Certain environmental expenditures receive regulatory accounting treatment and are recorded as regulatory assets.
See Notes 4 and 5 for further information.
Pension and Other Post-Retirement Benefit Plans
Duke Energy maintains qualified, non-qualified and other post-retirement benefit plans. Eligible employeesinclude consideration of the Subsidiary Registrants participateseverity and duration of any decline in the respective qualified, non-qualified and other post-retirement benefit plans and the Subsidiary Registrants are allocated their proportionate share of benefit costs. See Note 21 for further information, including significant accounting policies associated with these plans.
Severance and Special Termination Benefits
Duke Energy has severance plans under which, in general, the longer a terminated employee worked prior to termination the greater the amount of severance benefits. A liability for involuntary severance is recorded once an involuntary severance plan is committed to by management if involuntary severances are probable and can be reasonably estimated. For involuntary severance benefits incremental to its ongoing severance plan benefits, the fair value of the obligationinvestments. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. Key inputs that involve estimates and significant management judgment include cash flow projections, selection of a discount rate, probability weighting of potential outcomes, and whether any decline in value is expensedconsidered temporary.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Property, Plant and Equipment
Property, plant and equipment are stated at the communication datelower of depreciated historical cost net of any disallowances or fair value, if there are no future service requirements or over the required future service period. From time to time,impaired. The Duke Energy offers special termination benefits under voluntary severance programs. Special termination benefits are recorded immediately upon employee acceptance absent a significant retention period. Otherwise,Registrants capitalize all construction-related direct labor and material costs, as well as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction and Interest Capitalized” for information on capitalized financing costs. Costs of renewals and betterments that extend the cost is recorded over the remaining service period. Employee acceptance of voluntary severance benefits is determined by management based on the facts and circumstances of the benefits being offered. See Note 19 for further information.
Guarantees
If necessary, liabilities are recognized at the time of issuance or material modification of a guarantee for the estimated fair value of the obligation it assumes. Fair value is estimated using a probability-weighted approach. The obligation is reduced over the term of the guarantee or related contract in a systematic and rational method as risk is reduced. Any additional contingent loss for guarantee contracts subsequent to the initial recognition of a liability is accounted for and recognized at the time a loss is probable and can be reasonably estimated. See Note 7 for further information.
Stock-Based Compensation
Stock-based compensation represents costs related to stock-based awards granted to employees and Duke Energy Board of Directors (Board of Directors) members. Duke Energy recognizes stock-based compensation based upon the estimated fair value of awards, net of estimated forfeitures at the date of issuance. The recognition period for these costs begins at either the applicable service inception date or grant date and continues throughout the requisite service period. Compensation cost is recognized as expense or capitalized as a componentuseful life of property, plant and equipment. See Note 20 for further information.
Income Taxes
Duke Energyequipment are also capitalized. The cost of repairs, replacements and its subsidiaries file a consolidated federal income tax return and other state and foreign jurisdictional returns. The Subsidiary Registrantsmajor maintenance projects, which do not extend the useful life or increase the expected output of the asset, are parties to a tax-sharing agreement with Duke Energy. Income taxes recorded represent amounts the Subsidiary Registrants would incurexpensed as separate C-Corporations. Deferred income taxes have been provided for temporary differences between GAAP and tax bases of assets and liabilities because the differences create taxable or tax-deductible amounts for future periods. Investment tax credits (ITCs) associated with regulated operations are deferred and amortized as a reduction of income tax expenseincurred. Depreciation is generally computed over the estimated useful liveslife of the related properties.
Accumulated deferred income taxes are valuedasset using the enacted tax rate expectedcomposite straight-line method. Depreciation studies are conducted periodically to apply to taxable incomeupdate composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the periods in which the deferred tax asset or liability is expected to be settled or realized. In the event of a change in tax rates, deferred tax assets and liabilities are remeasured as of the enactment date of the new rate. To the extenttable that the change in the value of the deferred tax represents an obligation to customers, the impact of the remeasurement is deferred to a regulatory liability. Remaining impacts are recorded in income from continuing operations. Other impacts of the Tax Act have been recorded on a provisional basis, see Note 22, “Income Taxes,” for additional information. If Duke Energy's estimate of the tax effect of reversing temporary differences is not reflective of actual outcomes, is modified to reflect new developments or interpretations of the tax law, revised to incorporate new accounting principles, or changes in the expected timing or manner of the reversal then Duke Energy's results of operations could be impacted.

135

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Tax-related interest and penalties are recorded in Interest Expense and Other Income and Expenses, net in the Consolidated Statements of Operations.
See Note 22 for further information.
Accounting for Renewable Energy Tax Credits
When Duke Energy receives ITCs on wind or solar facilities, it reduces the basis of the property recorded on the Consolidated Balance Sheets by the amount of the ITC and, therefore, the ITC benefit is ultimately recognized in the statement of operations through reduced depreciation expense. Additionally, certain tax credits and government grants result in an initial tax depreciable base in excess of the book carrying value by an amount equal to one half of the ITC. Deferred tax benefits are recorded as a reduction to income tax expense in the period that the basis difference is created.
Excise Taxes
Certain excise taxes levied by state or local governments are required to be paid even if not collected from the customer. These taxes are recognized on a gross basis. Otherwise, the taxes are accounted for net. Excise taxes accounted for on a gross basis within both Operating Revenues and Property and other taxes in the Consolidated Statements of Operations were as follows.
 Years Ended December 31,
 2018
 2017
 2016
Duke Energy3.0% 2.8% 2.8%
Duke Energy Carolinas2.8% 2.8% 2.8%
Progress Energy2.9% 2.6% 2.7%
Duke Energy Progress2.9% 2.6% 2.6%
Duke Energy Florida3.0% 2.8% 2.8%
Duke Energy Ohio2.8% 2.8% 2.6%
Duke Energy Indiana3.3% 3.0% 3.1%
Piedmont(a)
2.5% 2.3%  
 Years Ended December 31,
(in millions)2017
 2016
 2015
Duke Energy$376
 $362
 $396
Duke Energy Carolinas36
 31
 31
Progress Energy220
 213
 229
Duke Energy Progress19
 18
 16
Duke Energy Florida201
 195
 213
Duke Energy Ohio98
 100
 102
Duke Energy Indiana20
 17
 34
Piedmont(a)
2
    
(a)Piedmont's excise taxes were immaterialweighted average depreciation rate was 2.4 percent for the annualized two months ended December 31, 2016, and $2 million for the yearsyear ended October 31, 2016, and 2015.2016.
Dividend Restrictions and Unappropriated Retained Earnings
In general, when the Duke Energy doesRegistrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in advance of its original expected useful life or is abandoned, the cost of the asset and the corresponding accumulated depreciation is recognized as a separate asset. If the asset is still in operation, the net amount is classified as Generation facilities to be retired, net on the Consolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of long-lived asset impairments above). When it becomes probable an asset will be abandoned, the cost of the asset and accumulated depreciation is reclassified to Regulatory assets on the Consolidated Balance Sheets for amounts recoverable in rates. The carrying value of the asset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, havean impairment is recognized to the extent the net book value of the asset exceeds the present value of future revenues discounted at the incremental borrowing rate.
When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body. See Note 10 for additional information.
Nuclear Fuel
Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets.
Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method.
Allowance for Funds Used During Construction and Interest Capitalized
For regulated operations, the debt and equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets.
AFUDC equity, a permanent difference for income taxes, reduces the ETR when capitalized and increases the ETR when depreciated or amortized. See Note 23 for additional information.
For nonregulated operations, interest is capitalized during the construction phase with an offsetting non-cash credit to Interest Expense on the Consolidated Statements of Operations.
Asset Retirement Obligations
AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be probable of recovery.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any legal,changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or other restrictionsliability.
Obligations for nuclear decommissioning are based on paying common stock dividends to shareholders. However, as further described in Note 4, due to conditions establishedsite-specific cost studies. Duke Energy Carolinas and Duke Energy Progress assume prompt dismantlement of the nuclear facilities after operations are ceased. Duke Energy Florida assumes Crystal River Unit 3 will be placed into a safe storage configuration until eventual dismantlement is completed by regulators in conjunction with merger transaction approvals,2074. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Ohio, Florida also assume that spent fuel will be stored on-site until such time that it can be transferred to a yet to be built DOE facility.
Obligations for closure of ash basins are based upon discounted cash flows of estimated costs for site-specific plans, if known, or probability weightings of the potential closure methods if the closure plans are under development and multiple closure options are being considered and evaluated on a site-by-site basis. See Note 9 for additional information.
Revenue Recognition
Duke Energy Indianarecognizes revenue as customers obtain control of promised goods and Piedmont have restrictions on paying dividendsservices in an amount that reflects consideration expected in exchange for those goods or otherwise advancing fundsservices. Generally, the delivery of electricity and natural gas results in the transfer of control to Duke Energy. At December 31, 2017,customers at the time the commodity is delivered and 2016, an insignificantthe amount of Duke Energy’s consolidated Retainedrevenue recognized is equal to the amount billed to each customer, including estimated volumes delivered when billings have not yet occurred. See Note 18 for further information.
Derivatives and Hedging
Derivative and non-derivative instruments may be used in connection with commodity price and interest rate activities, including swaps, futures, forwards and options. All derivative instruments, except those that qualify for the NPNS exception, are recorded on the Consolidated Balance Sheets at fair value. Qualifying derivative instruments may be designated as either cash flow hedges or fair value hedges. Other derivative instruments (undesignated contracts) either have not been designated or do not qualify as hedges. The effective portion of the change in the fair value of cash flow hedges is recorded in AOCI. The effective portion of the change in the fair value of a fair value hedge is offset in net income by changes in the hedged item. For activity subject to regulatory accounting, gains and losses on derivative contracts are reflected as regulatory assets or liabilities and not as other comprehensive income or current period income. As a result, changes in fair value of these derivatives have no immediate earnings balance represents undistributed earningsimpact.
Formal documentation, including transaction type and risk management strategy, is maintained for all contracts accounted for as a hedge. At inception and at least every three months thereafter, the hedge contract is assessed to see if it is highly effective in offsetting changes in cash flows or fair values of equity method investments.hedged items.
See Note 14 for further information.
New Accounting Standards
See Note 1 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies,” for a discussion of the impact of new accounting standards.
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See “Management’s Discussion and Analysis of Results of Operations and Financial Condition – Quantitative and Qualitative Disclosures About Market Risk.”



FINANCIAL STATEMENTS


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Duke Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows 
Consolidated Statements of Changes in Equity
Duke Energy Carolinas
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Progress Energy
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Progress
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Florida
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Ohio
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Duke Energy Indiana
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity
Piedmont
Report of Independent Registered Public Accounting Firm
Consolidated Statements of Operations and Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Changes in Equity



FINANCIAL STATEMENTS


Combined Notes to Consolidated Financial Statements
Note 1 – Summary of Significant Accounting Policies
Note 2 – Acquisitions and Dispositions
Note 3 – Business Segments
Note 4 – Regulatory Matters
Note 5 – Commitments and Contingencies
Note 6 – Debt and Credit Facilities
Note 7 – Guarantees and Indemnifications
Note 8 – Joint Ownership of Generating and Transmission Facilities
Note 9 – Asset Retirement Obligations
Note 10 – Property, Plant and Equipment
Note 11 – Goodwill and Intangible Assets
Note 12 – Investments in Unconsolidated Affiliates
Note 13 – Related Party Transactions
Note 14 – Derivatives and Hedging
Note 15 – Investments in Debt and Equity Securities
Note 16 – Fair Value Measurements
Note 17 – Variable Interest Entities
Note 18 – Revenue
Note 19 – Common Stock
Note 20 – Severance
Note 21 – Stock-Based Compensation
Note 22 – Employee Benefit Plans
Note 23 – Income Taxes
Note 24 – Other Income and Expenses, Net
Note 25 – Subsequent Events
Note 26 – Quarterly Financial Data (Unaudited)



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of Duke Energy Corporation
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Corporation and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 28, 2019, expressed an unqualified opinion on the Company's internal control over financial reporting.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS
 Years Ended December 31,
(in millions, except per share amounts)2018
 2017
 2016
Operating Revenues     
Regulated electric$22,097
 $21,177
 $21,221
Regulated natural gas1,773
 1,734
 863
Nonregulated electric and other651
 654
 659
Total operating revenues24,521
 23,565
 22,743
Operating Expenses     
Fuel used in electric generation and purchased power6,831
 6,350
 6,625
Cost of natural gas697
 632
 265
Operation, maintenance and other6,463
 5,944
 6,224
Depreciation and amortization4,074
 3,527
 3,294
Property and other taxes1,280
 1,233
 1,142
Impairment charges402
 282
 18
Total operating expenses19,747
 17,968
 17,568
(Losses) Gains on Sales of Other Assets and Other, net(89) 28
 27
Operating Income4,685
 5,625
 5,202
Other Income and Expenses     
Equity in earnings (losses) of unconsolidated affiliates83
 119
 (15)
Other income and expenses, net399
 508
 463
Total other income and expenses482
 627
 448
Interest Expense2,094
 1,986
 1,916
Income From Continuing Operations Before Income Taxes3,073
 4,266
 3,734
Income Tax Expense From Continuing Operations448
 1,196
 1,156
Income From Continuing Operations2,625
 3,070
 2,578
Income (Loss) From Discontinued Operations, net of tax19
 (6) (408)
Net Income2,644
 3,064
 2,170
Less: Net (Loss) Income Attributable to Noncontrolling Interests(22) 5
 18
Net Income Attributable to Duke Energy Corporation$2,666
 $3,059
 $2,152
      
Earnings Per Share  Basic and Diluted
     
Income from continuing operations attributable to Duke Energy Corporation common stockholders     
Basic$3.73
 $4.37
 $3.71
Diluted$3.73
 $4.37
 $3.71
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders
    
Basic$0.03
 $(0.01) $(0.60)
Diluted$0.03
 $(0.01) $(0.60)
Net income attributable to Duke Energy Corporation common stockholders
    
Basic$3.76
 $4.36
 $3.11
Diluted$3.76
 $4.36
 $3.11
Weighted average shares outstanding     
Basic708
 700
 691
Diluted708
 700
 691
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  
2018
 2017
 2016
Net Income$2,644
 $3,064
 $2,170
Other Comprehensive (Loss) Income, net of tax     
Foreign currency translation adjustments
 
 694
Pension and OPEB adjustments(6) 3
 (11)
Net unrealized (losses) gains on cash flow hedges(10) 2
 17
Reclassification into earnings from cash flow hedges6
 8
 13
Unrealized (losses) gains on available-for-sale securities(3) 13
 2
Other Comprehensive (Loss) Income, net of tax  
(13) 26
 715
Comprehensive Income  
2,631
 3,090
 2,885
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests  
(22) 5
 20
Comprehensive Income Attributable to Duke Energy Corporation  
$2,653
 $3,085
 $2,865

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$442
 $358
Receivables (net of allowance for doubtful accounts of $16 at 2018 and $14 at 2017)962
 779
Receivables of VIEs (net of allowance for doubtful accounts of $55 at 2018 and $54 at 2017)2,172
 1,995
Inventory3,084

3,250
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)2,005
 1,437
Other (includes $162 at 2018 and $214 at 2017 related to VIEs)1,049
 634
Total current assets9,714
 8,453
Property, Plant and Equipment   
Cost134,458
 127,507
Accumulated depreciation and amortization(43,126) (41,537)
Generation facilities to be retired, net362
 421
Net property, plant and equipment91,694
 86,391
Other Noncurrent Assets   
Goodwill19,303
 19,396
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)13,617
 12,442
Nuclear decommissioning trust funds6,720
 7,097
Investments in equity method unconsolidated affiliates1,409
 1,175
Other2,935
 2,960
Total other noncurrent assets43,984
 43,070
Total Assets$145,392
 $137,914
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$3,487
 $3,043
Notes payable and commercial paper3,410
 2,163
Taxes accrued577
 551
Interest accrued559
 525
Current maturities of long-term debt (includes $227 at 2018 and $225 at 2017 related to VIEs)3,406
 3,244
Asset retirement obligations919
 689
Regulatory liabilities598
 402
Other2,085
 1,865
Total current liabilities15,041
 12,482
Long-Term Debt (includes $3,998 at 2018 and $4,306 at 2017 related to VIEs)51,123
 49,035
Other Noncurrent Liabilities   
Deferred income taxes7,806
 6,621
Asset retirement obligations9,548
 9,486
Regulatory liabilities14,834
 15,330
Accrued pension and other post-retirement benefit costs988
 1,103
Investment tax credits568
 539
Other (includes $212 at 2018 and $241 at 2017 related to VIEs)1,650
 1,581
Total other noncurrent liabilities35,394
 34,660
Commitments and Contingencies   
Equity   
Common stock, $0.001 par value, 2 billion shares authorized; 727 million shares outstanding at 2018 and 700 million shares outstanding at 20171
 1
Additional paid-in capital40,795
 38,792
Retained earnings3,113
 3,013
Accumulated other comprehensive loss(92) (67)
Total Duke Energy Corporation stockholders' equity43,817
 41,739
Noncontrolling interests17
 (2)
Total equity43,834
 41,737
Total Liabilities and Equity$145,392
 $137,914

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$2,644
 $3,064
 $2,170
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)4,696
 4,046
 3,880
Equity component of AFUDC(221) (237) (200)
Losses (Gains) on sales of other assets88
 (33) 477
Impairment charges402
 282
 212
Deferred income taxes1,079
 1,433
 900
Equity in (earnings) losses of unconsolidated affiliates(83) (119) 15
Accrued pension and other post-retirement benefit costs61
 8
 21
Contributions to qualified pension plans(141) (19) (155)
Payments for asset retirement obligations(533) (571) (608)
Payment for the disposal of other assets(105) 
 
Other rate case adjustments37
 
 
Provision for rate refunds425
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions22
 18
 34
Receivables(345) (83) (372)
Inventory156
 268
 272
Other current assets(721) (400) (174)
Increase (decrease) in     
Accounts payable479
 (204) 296
Taxes accrued23
 149
 236
Other current liabilities270
 (482) 182
Other assets(1,008) (436) (186)
Other liabilities(39) (60) (137)
Net cash provided by operating activities7,186

6,624

6,863
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(9,389) (8,052) (7,901)
Contributions to equity method investments(416) (414) (307)
Acquisitions, net of cash acquired
 (13) (4,778)
Return of investment capital137
 281
 1
Purchases of debt and equity securities(3,762) (4,071) (5,153)
Proceeds from sales and maturities of debt and equity securities3,747
 4,098
 5,236
Proceeds from the sales of discontinued operations and other assets, net of cash divested41
 
 1,418
Other(418) (271) (44)
Net cash used in investing activities(10,060)
(8,442)
(11,528)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the:     
Issuance of long-term debt5,299
 6,909
 9,238
Issuance of common stock1,838
 
 731
Payments for the redemption of long-term debt(2,906) (2,316) (1,923)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days472
 319
 2,081
Payments for the redemption of short-term debt with original maturities greater than 90 days(282) (272) (2,166)
Notes payable and commercial paper981
 (409) (1,362)
Dividends paid(2,471) (2,450) (2,332)
Other29
 1
 (16)
Net cash provided by financing activities2,960

1,782

4,251
Changes in cash and cash equivalents included in assets held for sale
 
 474
Net increase (decrease) in cash, cash equivalents, and restricted cash86

(36)
60
Cash, cash equivalents, and restricted cash at beginning of period505
 541
 481
Cash, cash equivalents, and restricted cash at end of period$591

$505

$541
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$2,086
 $1,963
 $1,794
Cash (received from) paid for income taxes(266) 4
 229
Significant non-cash transactions:     
Accrued capital expenditures1,112
 1,032
 1,000
Non-cash dividends107
 
 
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY CORPORATION
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         
Duke Energy Corporation Stockholders'
Accumulated Other Comprehensive Loss
      
             Net Unrealized
   Total
    
         Foreign
 Net
 Gains (Losses)
   Duke Energy
    
 Common
   Additional
   Currency
 Losses on
 on Available-
 Pension and
 Corporation
    
 Stock
 Common
 Paid-in
 Retained
 Translation
 Cash Flow
 for-Sale-
 OPEB
 Stockholders'
 Noncontrolling
 Total
(in millions)Shares
 Stock
 Capital
 Earnings
 Adjustments
 Hedges
 Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015688
 $1
 $37,968
 $2,564
 $(692) $(50) $(3) $(61) $39,727
 $44
 $39,771
Net income
 
 
 2,152
 
 
 
 
 2,152
 18
 2,170
Other comprehensive income (loss)(a)

 
 
 
 692
 30
 2
 (11) 713
 2
 715
Common stock issuances, including dividend reinvestment and employee benefits12
 
 773
 
 
 
 
 
 773
 
 773
Common stock dividends
 
 
 (2,332) 
 
 
 
 (2,332) 
 (2,332)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (6) (6)
Other(b)

 
 
 
 
 
 
 
 
 (50) (50)
Balance at December 31, 2016700

$1

$38,741

$2,384

$

$(20)
$(1)
$(72)
$41,033

$8

$41,041
Net income
 
 
 3,059
 
 
 
 
 3,059
 5
 3,064
Other comprehensive income
 
 
 
 
 10
 13
 3
 26
 
 26
Common stock issuances, including dividend reinvestment and employee benefits
 
 51
 
 
 
 
 
 51
 
 51
Common stock dividends
 
 
 (2,450) 
 
 
 
 (2,450) 
 (2,450)
Distributions to noncontrolling interest in subsidiaries
 
 
 
 
 
 
 
 
 (2) (2)
Other(c)

 
 
 20
 
 
 
 
 20
 (13) 7
Balance at December 31, 2017700

$1

$38,792

$3,013

$

$(10)
$12

$(69)
$41,739

$(2)
$41,737
Net income
 
 
 2,666
 
 
 
 
 2,666
 (22) 2,644
Other comprehensive (loss) income
 
 
 
 
 (4) (3) (6) (13) 
 (13)
Common stock issuances, including dividend reinvestment and employee benefits27
 
 2,003
 
 
 
 
 
 2,003
 
 2,003
Common stock dividends
 
 
 (2,578) 
 
 
 
 (2,578) 
 (2,578)
Distributions to noncontrolling interests in subsidiaries
 
 
 
 
 
 
 
 
 (1) (1)
Other(d)

 
 
 12
 
 
 (12) 
 
 42
 42
Balance at December 31, 2018727
 $1
 $40,795
 $3,113
 $
 $(14) $(3) $(75) $43,817
 $17
 $43,834
(a)Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(b)Noncontrolling Interests amount is primarily related to the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.
(c)Retained Earnings relates to a cumulative-effect adjustment due to implementation of a new accounting standard related to stock-based compensation and the associated income taxes. See Note 1 to the Consolidated Financial Statements for additional information. Noncontrolling Interests relates to the purchase of remaining interest in REC Solar.
(d)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information. Amount in Noncontrolling Interests primarily relates to tax equity financing activity in the Commercial Renewables segment.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Carolinas, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Carolinas, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1947.




FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$7,300
 $7,302
 $7,322
Operating Expenses     
Fuel used in electric generation and purchased power1,821

1,822
 1,797
Operation, maintenance and other2,130

2,021
 2,158
Depreciation and amortization1,201

1,090
 1,075
Property and other taxes295

281
 276
Impairment charges192


 1
Total operating expenses5,639
 5,214
 5,307
(Losses) Gains on Sales of Other Assets and Other, net(1) 1
 (5)
Operating Income1,660
 2,089
 2,010
Other Income and Expenses, net153
 199
 214
Interest Expense439
 422
 424
Income Before Income Taxes1,374
 1,866
 1,800
Income Tax Expense303
 652
 634
Net Income$1,071
 $1,214
 $1,166
Other Comprehensive Income, net of tax     
Reclassification into earnings from cash flow hedges1
 2
 2
Other Comprehensive Income, net of tax1
 2
 2
Comprehensive Income$1,072
 $1,216
 $1,168
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED BALANCE SHEETS
  December 31,
(in millions) 2018
 2017
ASSETS    
Current Assets    
Cash and cash equivalents $33
 $16
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017) 219
 200
Receivables of VIEs (net of allowance for doubtful accounts of $7 at 2018 and 2017) 699
 640
Receivables from affiliated companies 182
 95
Inventory 948

971
Regulatory assets 520
 299
Other 72
 19
Total current assets 2,673
 2,240
Property, Plant and Equipment    
Cost 44,741
 42,939
Accumulated depreciation and amortization (15,496) (15,063)
Net property, plant and equipment 29,245
 27,876
Other Noncurrent Assets    
Regulatory assets 3,457
 2,853
Nuclear decommissioning trust funds 3,558
 3,772
Other 1,027
 979
Total other noncurrent assets 8,042
 7,604
Total Assets $39,960
 $37,720
LIABILITIES AND EQUITY    
Current Liabilities    
Accounts payable $988
 $842
Accounts payable to affiliated companies 230
 209
Notes payable to affiliated companies 439
 104
Taxes accrued 171
 234
Interest accrued 102
 108
Current maturities of long-term debt 6
 1,205
Asset retirement obligations 290
 337
Regulatory liabilities 199
 126
Other 571
 486
Total current liabilities 2,996
 3,651
Long-Term Debt 10,633
 8,598
Long-Term Debt Payable to Affiliated Companies 300
 300
Other Noncurrent Liabilities    
Deferred income taxes 3,689
 3,413
Asset retirement obligations 3,659
 3,273
Regulatory liabilities 5,999
 6,231
Accrued pension and other post-retirement benefit costs 99
 95
Investment tax credits 231
 232
Other 671
 566
Total other noncurrent liabilities 14,348
 13,810
Commitments and Contingencies 
 
Equity    
Member's equity 11,689
 11,368
Accumulated other comprehensive loss (6) (7)
Total equity 11,683
 11,361
Total Liabilities and Equity $39,960
 $37,720
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,071
 $1,214
 $1,166
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,487
 1,409
 1,382
Equity component of AFUDC(73) (106) (102)
Losses (Gains) on sales of other assets1
 (1) 5
Impairment charges192
 
 1
Deferred income taxes305
 410
 470
Accrued pension and other post-retirement benefit costs4
 (4) 4
Contributions to qualified pension plans(46) 
 (43)
Payments for asset retirement obligations(230) (271) (287)
Provision for rate refunds182
 
 
(Increase) decrease in
    
Net realized and unrealized mark-to-market and hedging transactions2
 9
 5
Receivables(86) (9) (76)
Receivables from affiliated companies(87) 68
 (56)
Inventory25
 78
 215
Other current assets(161) 7
 67
Increase (decrease) in
    
Accounts payable168
 23
 (69)
Accounts payable to affiliated companies21
 (38) 18
Taxes accrued(65) 86
 187
Other current liabilities89
 (161) 63
Other assets(179) (49) 20
Other liabilities(90) (31) 6
Net cash provided by operating activities2,530
 2,634
 2,976
CASH FLOWS FROM INVESTING ACTIVITIES
    
Capital expenditures(2,706) (2,524) (2,220)
Purchases of debt and equity securities(1,810) (2,124) (2,832)
Proceeds from sales and maturities of debt and equity securities1,810
 2,128
 2,832
Notes receivable from affiliated companies
 66
 97
Other(147) (109) (83)
Net cash used in investing activities(2,853) (2,563) (2,206)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,983
 569
 1,587
Payments for the redemption of long-term debt(1,205) (116) (356)
Notes payable to affiliated companies335
 104
 
Distributions to parent(750) (625) (2,000)
Other(23) (1) 
Net cash provided by (used in) financing activities340
 (69) (769)
Net increase in cash and cash equivalents17
 2
 1
Cash and cash equivalents at beginning of period16
 14
 13
Cash and cash equivalents at end of period$33
 $16
 $14
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$452
 $398
 $393
Cash paid for (received from) income taxes89
 193
 (60)
Significant non-cash transactions:     
Accrued capital expenditures302
 315
 347
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY CAROLINAS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Accumulated Other  
   Comprehensive  
   Loss  
   Net Losses
  
   on Cash
  
 Member's
 Flow
 Total
(in millions)Equity
 Hedges
 Equity
Balance at December 31, 2015$11,617
 $(11) $11,606
Net income1,166
 
 1,166
Other comprehensive income
 2
 2
Distributions to parent(2,000) 
 (2,000)
Other(2) 
 (2)
Balance at December 31, 2016$10,781
 $(9) $10,772
Net income1,214
 
 1,214
Other comprehensive income
 2
 2
Distributions to parent(625) 
 (625)
Other(2) 
 (2)
Balance at December 31, 2017$11,368
 $(7) $11,361
Net income  
1,071
 
 1,071
Other comprehensive income  

 1
 1
Distributions to parent  
(750) 
 (750)
Balance at December 31, 2018$11,689
 $(6) $11,683
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Progress Energy, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Progress Energy, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$10,728
 $9,783
 $9,853
Operating Expenses     
Fuel used in electric generation and purchased power3,976
 3,417
 3,644
Operation, maintenance and other2,613
 2,301
 2,458
Depreciation and amortization1,619
 1,285
 1,213
Property and other taxes529
 503
 487
Impairment charges87
 156
 7
Total operating expenses8,824

7,662

7,809
Gains on Sales of Other Assets and Other, net24
 26
 25
Operating Income1,928

2,147

2,069
Other Income and Expenses, net165
 209
 186
Interest Expense842
 824
 689
Income From Continuing Operations Before Income Taxes1,251

1,532

1,566
Income Tax Expense From Continuing Operations218
 264
 527
Income From Continuing Operations1,033

1,268

1,039
Income From Discontinued Operations, net of tax
 
 2
Net Income1,033

1,268

1,041
Less: Net Income Attributable to Noncontrolling Interests6
 10
 10
Net Income Attributable to Parent$1,027

$1,258

$1,031
      
Net Income  
$1,033

$1,268

$1,041
Other Comprehensive Income, net of tax  
     
Pension and OPEB adjustments5
 4
 1
Net unrealized gain on cash flow hedges6
 5
 
Reclassification into earnings from cash flow hedges
 
 8
Unrealized (losses) gains on available-for-sale securities(1) 4
 1
Other Comprehensive Income, net of tax  
10

13

10
Comprehensive Income  
1,043

1,281

1,051
Less: Comprehensive Income Attributable to Noncontrolling Interests6
 10
 10
Comprehensive Income Attributable to Parent$1,037

$1,271

$1,041

See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$67
 $40
Receivables (net of allowance for doubtful accounts of $5 at 2018 and $4 at 2017)220
 123
Receivables of VIEs (net of allowance for doubtful accounts of $8 at 2018 and $7 at 2017)909
 780
Receivables from affiliated companies168
 31
Notes receivable from affiliated companies
 240
Inventory1,459

1,592
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)1,137
 741
Other (includes $39 at 2018 and $44 at 2017 related to VIEs)125
 334
Total current assets4,085
 3,881
Property, Plant and Equipment   
Cost50,260
 47,323
Accumulated depreciation and amortization(16,398) (15,857)
Generation facilities to be retired, net362
 421
Net property, plant and equipment34,224
 31,887
Other Noncurrent Assets   
Goodwill3,655
 3,655
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)6,564
 6,010
Nuclear decommissioning trust funds3,162
 3,324
Other974
 931
Total other noncurrent assets14,355
 13,920
Total Assets$52,664
 $49,688
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$1,172
 $1,006
Accounts payable to affiliated companies360
 251
Notes payable to affiliated companies1,235
 805
Taxes accrued109
 101
Interest accrued246
 212
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)1,672
 771
Asset retirement obligations514
 295
Regulatory liabilities280
 213
Other821
 729
Total current liabilities6,409
 4,383
Long-Term Debt (includes $1,636 at 2018 and $1,689 at 2017 related to VIEs)17,089
 16,916
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes3,941
 3,502
Asset retirement obligations4,897
 5,119
Regulatory liabilities5,049
 5,306
Accrued pension and other post-retirement benefit costs521
 545
Other351
 302
Total other noncurrent liabilities14,759
 14,774
Commitments and Contingencies
 
Equity   
Common stock, $0.01 par value, 100 shares authorized and outstanding at 2018 and 2017
 
Additional paid-in capital9,143
 9,143
Retained earnings5,131
 4,350
Accumulated other comprehensive loss(20) (25)
Total Progress Energy, Inc. stockholder's equity14,254
 13,468
Noncontrolling interests3
 (3)
Total equity14,257
 13,465
Total Liabilities and Equity$52,664

$49,688
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$1,033
 $1,268
 $1,041
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion (including amortization of nuclear fuel)1,987
 1,516
 1,435
Equity component of AFUDC(104) (92) (76)
Gains on sales of other assets(24) (28) (34)
Impairment charges87
 156
 7
Deferred income taxes358
 703
 532
Accrued pension and other post-retirement benefit costs24
 (28) (24)
Contributions to qualified pension plans(45) 
 (43)
Payments for asset retirement obligations(230) (248) (270)
Other rate case adjustments37
 
 
Provision for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions18
 
 42
Receivables(207) (89) 7
Receivables from affiliated companies(137) 71
 211
Inventory121
 125
 35
Other current assets(12) (397) 50
Increase (decrease) in     
Accounts payable217
 (260) 252
Accounts payable to affiliated companies109
 (97) 37
Taxes accrued8
 17
 15
Other current liabilities129
 (166) (42)
Other assets(913) (300) (248)
Other liabilities(34) (98) (36)
Net cash provided by operating activities2,544

2,053

2,891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(3,854) (3,152) (3,306)
Asset Acquisitions
 
 (10)
Purchases of debt and equity securities(1,753) (1,806) (2,143)
Proceeds from sales and maturities of debt and equity securities1,769
 1,824
 2,187
Net proceeds from sales of other assets20
 
 
Proceeds from insurance
 7
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies240
 (160) (80)
Other(182) (86) 47
Net cash used in investing activities(3,760) (3,353) (3,227)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt1,833
 2,118
 2,375
Payments for the redemption of long-term debt(771) (813) (327)
Notes payable to affiliated companies430
 100
 444
Dividends to parent(250) (124) (2,098)
Other(1) (4) (3)
Net cash provided by financing activities1,241

1,277

391
Net increase (decrease) in cash, cash equivalents, and restricted cash25

(23)
55
Cash, cash equivalents, and restricted cash at beginning of period87
 110
 55
Cash, cash equivalents, and restricted cash at end of period$112
 $87
 $110
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$798
 $773
 $673
Cash received from income taxes(348) (146) (187)
Significant non-cash transactions:     
Accrued capital expenditures478
 391
 317
Equitization of certain notes payable to affiliates
 1,047
 
Dividend to parent related to a legal entity restructuring
 547
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


PROGRESS ENERGY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
  
  
 Accumulated Other Comprehensive Loss  
  
  
     Net
 Net Unrealized
   Total Progress
    
 Additional
   Losses on
 Gains (Losses)
 Pension and
 Energy, Inc.
    
 Paid-in
 Retained
 Cash Flow
 on Available-for-
 OPEB
 Stockholder's
 Noncontrolling
 Total
(in millions)Capital
 Earnings
 Hedges
 Sale Securities
 Adjustments
 Equity
 Interests
 Equity
Balance at December 31, 2015$8,092
 $4,831
 $(31) $
 $(17) $12,875
 $(22) $12,853
Net income
 1,031
 
 
 
 1,031
 10
 1,041
Other comprehensive income
 
 8
 1
 1
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (2,098) 
 
 
 (2,098) 
 (2,098)
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2016$8,094

$3,764

$(23)
$1

$(16)
$11,820

$(13)
$11,807
Net income
 1,258
 
 
 
 1,258
 10
 1,268
Other comprehensive income
 
 5
 4
 4
 13
 
 13
Dividends to parent(a)

 (672) 
 
 
 (672) 
 (672)
Equitization of certain notes payable to affiliates1,047
 
 
 
 
 1,047
 
 1,047
Other2
 
 
 
 
 2
 
 2
Balance at December 31, 2017$9,143

$4,350

$(18)
$5

$(12)
$13,468

$(3)
$13,465
Net income
 1,027
 
 
 
 1,027
 6
 1,033
Other comprehensive income (loss)
 
 6
 (1) 5
 10
 
 10
Distributions to noncontrolling interests
 
 
 
 
 
 (1) (1)
Dividends to parent
 (250) 
 
 
 (250) 
 (250)
Other(b)

 4
 
 (5) 
 (1) 1
 
Balance at December 31, 2018$9,143

$5,131

$(12)
$(1)
$(7)
$14,254

$3

$14,257
(a)Includes a $547 million non-cash dividend related to a legal entity restructuring.
(b)Amounts in Retained Earnings and Accumulated Other Comprehensive Loss represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Progress, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Progress, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1930.




FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,699
 $5,129
 $5,277
Operating Expenses     
Fuel used in electric generation and purchased power1,892
 1,609
 1,830
Operation, maintenance and other1,578
 1,439
 1,565
Depreciation and amortization991
 725
 703
Property and other taxes155
 156
 156
Impairment charges33
 19
 1
Total operating expenses4,649
 3,948
 4,255
Gains on Sales of Other Assets and Other, net9
 4
 3
Operating Income1,059
 1,185
 1,025
Other Income and Expenses, net87
 115
 132
Interest Expense319
 293
 257
Income Before Income Taxes827
 1,007
 900
Income Tax Expense160
 292
 301
Net Income and Comprehensive Income$667
 $715
 $599
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$23
 $20
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $1 at 2017)75
 56
Receivables of VIEs (net of allowance for doubtful accounts of $5 at 2018 and 2017)547
 459
Receivables from affiliated companies23
 3
Inventory954

1,017
Regulatory assets703
 352
Other62
 97
Total current assets2,387
 2,004
Property, Plant and Equipment   
Cost31,459
 29,583
Accumulated depreciation and amortization(11,423) (10,903)
Generation facilities to be retired, net362
 421
Net property, plant and equipment20,398
 19,101
Other Noncurrent Assets   
Regulatory assets4,111
 3,507
Nuclear decommissioning trust funds2,503
 2,588
Other612
 599
Total other noncurrent assets7,226
 6,694
Total Assets$30,011
 $27,799
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$660
 $402
Accounts payable to affiliated companies278
 179
Notes payable to affiliated companies294
 240
Taxes accrued53
 64
Interest accrued116
 102
Current maturities of long-term debt603
 3
Asset retirement obligations509
 295
Regulatory liabilities178
 139
Other408
 376
Total current liabilities3,099
 1,800
Long-Term Debt7,451
 7,204
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes2,119
 1,883
Asset retirement obligations4,311
 4,378
Regulatory liabilities3,955
 3,999
Accrued pension and other post-retirement benefit costs237
 248
Investment tax credits142
 143
Other106
 45
Total other noncurrent liabilities10,870
 10,696
Commitments and Contingencies   
Equity   
Member's Equity8,441
 7,949
Total Liabilities and Equity$30,011
 $27,799
See Notes to Consolidated Financial Statements
FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018 2017 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$667
 $715
 $599
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation and amortization (including amortization of nuclear fuel)1,183
 936
 907
Equity component of AFUDC(57) (47) (50)
Gains on sales of other assets(9) (5) (6)
Impairment charges33
 19
 1
Deferred income taxes236
 384
 384
Accrued pension and other post-retirement benefit costs15
 (20) (32)
Contributions to qualified pension plans(25) 
 (24)
Payments for asset retirement obligations(195) (192) (212)
Other rate case adjustments37
 
 
Provisions for rate refunds122
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions5
 (4) 4
Receivables(107) (58) (17)
Receivables from affiliated companies(20) 2
 11
Inventory63
 59
 12
Other current assets(201) (75) 84
Increase (decrease) in     
Accounts payable219
 (230) 181
Accounts payable to affiliated companies99
 (48) 37
Taxes accrued(11) (39) 90
Other current liabilities46
 (131) 114
Other assets(484) (53) (163)
Other liabilities12
 (18) 12
Net cash provided by operating activities1,628
 1,195
 1,932
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(2,220) (1,715) (1,733)
Purchases of debt and equity securities(1,236) (1,249) (1,658)
Proceeds from sales and maturities of debt and equity securities1,206
 1,207
 1,615
Net proceeds from the sales of other assets20
 
 
Proceeds from insurance
 4
 
Notes receivable from affiliated companies
 165
 (165)
Other(115) (55) 26
Net cash used in investing activities(2,345) (1,643) (1,915)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt845
 812
 505
Payments for the redemption of long-term debt(3) (470) (15)
Notes payable to affiliated companies54
 240
 (209)
Distributions to parent(175) (124) (300)
Other(1) (1) (2)
Net cash provided by (used in) financing activities720
 457
 (21)
Net increase (decrease) in cash and cash equivalents3
 9
 (4)
Cash and cash equivalents at beginning of period20
 11
 15
Cash and cash equivalents at end of period$23
 $20
 $11
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$303
 $291
 $248
Cash (received from) paid for income taxes(112) 59
 (287)
Significant non-cash transactions:     
Accrued capital expenditures220
 191
 147
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY PROGRESS, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
 Member's
(in millions)Equity
Balance at December 31, 2015$7,059
Net income599
Distribution to parent(300)
Balance at December 31, 2016$7,358
Net income715
Distribution to parent(124)
Balance at December 31, 2017$7,949
Net income667
Distribution to parent(175)
Balance at December 31, 2018$8,441
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Florida, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Florida, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2001.




FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$5,021
 $4,646
 $4,568
Operating Expenses     
Fuel used in electric generation and purchased power2,085
 1,808
 1,814
Operation, maintenance and other1,025
 853
 884
Depreciation and amortization628
 560
 509
Property and other taxes374
 347
 333
Impairment charges54
 138
 6
Total operating expenses4,166
 3,706
 3,546
Gains on Sales of Other Assets and Other, net1
 1
 
Operating Income856
 941
 1,022
Other Income and Expenses, net86
 96
 63
Interest Expense287
 279
 212
Income Before Income Taxes655
 758
 873
Income Tax Expense101
 46
 322
Net Income$554
 $712
 $551
Other Comprehensive (Loss) Income, net of tax     
Unrealized (losses) gains on available-for-sale securities(1) 3
 1
Other Comprehensive (Loss) Income, net of tax(1) 3
 1
Comprehensive Income$553
 $715
 $552
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$36
 $13
Receivables (net of allowance for doubtful accounts of $3 at 2018 and 2017)143
 65
Receivables of VIEs (net of allowance for doubtful accounts of $3 at 2018 and $2 at 2017)362
 321
Receivables from affiliated companies28
 2
Notes receivable from affiliated companies
 313
Inventory504

574
Regulatory assets (includes $52 at 2018 and $51 at 2017 related to VIEs)434
 389
Other (includes $39 at 2018 and $40 at 2017 related to VIEs)46
 86
Total current assets1,553
 1,763
Property, Plant and Equipment   
Cost18,792
 17,730
Accumulated depreciation and amortization(4,968) (4,947)
Net property, plant and equipment13,824
 12,783
Other Noncurrent Assets   
Regulatory assets (includes $1,041 at 2018 and $1,091 at 2017 related to VIEs)2,454
 2,503
Nuclear decommissioning trust funds659
 736
Other311
 284
Total other noncurrent assets3,424
 3,523
Total Assets$18,801
 $18,069
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$511
 $602
Accounts payable to affiliated companies91
 74
Notes payable to affiliated companies108
 
Taxes accrued74
 34
Interest accrued75
 56
Current maturities of long-term debt (includes $53 at 2018 and 2017 related to VIEs)270
 768
Asset retirement obligations5
 
Regulatory liabilities102
 74
Other406
 334
Total current liabilities1,642
 1,942
Long-Term Debt (includes $1,336 at 2018 and $1,389 at 2017 related to VIEs)7,051
 6,327
Other Noncurrent Liabilities   
Deferred income taxes1,986
 1,761
Asset retirement obligations586
 742
Regulatory liabilities1,094
 1,307
Accrued pension and other post-retirement benefit costs254
 264
Other93
 108
Total other noncurrent liabilities4,013
 4,182
Commitments and Contingencies   
Equity   
Member's equity6,097
 5,614
Accumulated other comprehensive income(2) 4
Total equity6,095
 5,618
Total Liabilities and Equity$18,801
 $18,069
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$554
 $712
 $551
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion793
 570
 516
Equity component of AFUDC(47) (45) (26)
Gains on sales of other assets(1) (1) 
Impairment charges54
 138
 6
Deferred income taxes159
 245
 224
Accrued pension and other post-retirement benefit costs5
 (13) 2
Contributions to qualified pension plans(20) 
 (20)
Payments for asset retirement obligations(35) (56) (58)
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions7
 5
 38
Receivables(100) (38) 23
Receivables from affiliated companies(26) 
 21
Inventory58
 66
 23
Other current assets59
 (138) (86)
Increase (decrease) in     
Accounts payable(1) (32) 71
Accounts payable to affiliated companies17
 (51) 9
Taxes accrued40
 1
 (117)
Other current liabilities82
 (37) (149)
Other assets(428) (229) (84)
Other liabilities(61) (82) (53)
Net cash provided by operating activities1,109
 1,015
 891
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(1,634) (1,437) (1,583)
Purchases of debt and equity securities(517) (557) (485)
Proceeds from sales and maturities of debt and equity securities563
 617
 572
Proceeds from insurance
 4
 58
Proceeds from the sale of nuclear fuel
 20
 20
Notes receivable from affiliated companies313
 (313) 
Other(65) (31) 21
Net cash used in investing activities(1,340) (1,697) (1,397)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt988
 1,306
 1,870
Payments for the redemption of long-term debt(769) (342) (12)
Notes payable to affiliated companies108
 (297) (516)
Distribution to parent(75) 
 (775)
Other1
 (1) 
Net cash provided by financing activities253
 666
 567
Net increase (decrease) in cash, cash equivalents, and restricted cash22
 (16) 61
Cash, cash equivalents, and restricted cash at beginning of period53
 69
 8
Cash, cash equivalents, and restricted cash at end of period$75
 $53
 $69
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$270
 $274
 $208
Cash (received from) paid for income taxes(120) (197) 216
Significant non-cash transactions:     
Accrued capital expenditures258
 199
 170
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY FLORIDA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
    Accumulated 
    Other 
    Comprehensive 
    Income (Loss) 
    Net Unrealized
  
    Gains (Losses) on
  
  Member's
 Available-for-
 Total
(in millions) Equity
 Sale Securities
 Equity
Balance at December 31, 2015 $5,121
 $
 $5,121
Net income 551
 
 551
Other comprehensive income 
 1
 1
Distribution to parent (775) 
 (775)
Other 2
 
 2
Balance at December 31, 2016 $4,899
 $1
 $4,900
Net income 712
 
 712
Other comprehensive income 
 3
 3
Other 3
 
 3
Balance at December 31, 2017 $5,614
 $4
 $5,618
Net income 554
 
 554
Other comprehensive loss 
 (1) (1)
Distribution to parent (75) 
 (75)
Other(a)
 4
 (5) (1)
Balance at December 31, 2018 $6,097
 $(2) $6,095
(a)Amounts represent a cumulative-effect adjustment due to implementation of a new accounting standard related to Financial Instruments Classification and Measurement. See Note 1 for more information.
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Ohio, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Ohio, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)  2018
 2017
 2016
Operating Revenues     
Regulated electric$1,450
 $1,373
 $1,410
Regulated natural gas506
 508
 503
Nonregulated electric and other1
 42
 31
Total operating revenues1,957
 1,923
 1,944
Operating Expenses  
     
Fuel used in electric generation and purchased power – regulated412
 369
 442
Fuel used in electric generation and purchased power – nonregulated
 58
 51
Cost of natural gas  113
 107
 103
Operation, maintenance and other480
 530
 514
Depreciation and amortization268
 261
 233
Property and other taxes290
 278
 258
Impairment charges
 1
 
Total operating expenses1,563
 1,604
 1,601
(Losses) Gains on Sales of Other Assets and Other, net(106) 1
 2
Operating Income288
 320
 345
Other Income and Expenses, net23
 23
 11
Interest Expense92
 91
 86
Income From Continuing Operations Before Income Taxes219
 252
 270
Income Tax Expense From Continuing Operations43
 59
 78
Income From Continuing Operations176
 193
 192
(Loss) Income From Discontinued Operations, net of tax
 (1) 36
Net Income and Comprehensive Income$176
 $192
 $228
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$21
 $12
Receivables (net of allowance for doubtful accounts of $2 at 2018 and $3 at 2017)102
 68
Receivables from affiliated companies114
 133
Notes receivable from affiliated companies
 14
Inventory126

133
Regulatory assets33
 49
Other24
 39
Total current assets420
 448
Property, Plant and Equipment   
Cost9,360
 8,732
Accumulated depreciation and amortization(2,717) (2,691)
Net property, plant and equipment6,643
 6,041
Other Noncurrent Assets   
Goodwill920
 920
Regulatory assets531
 445
Other41
 21
Total other noncurrent assets1,492
 1,386
Total Assets$8,555
 $7,875
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$316
 $313
Accounts payable to affiliated companies78
 62
Notes payable to affiliated companies274
 29
Taxes accrued202
 190
Interest accrued22
 21
Current maturities of long-term debt551
 3
Asset retirement obligations6
 3
Regulatory liabilities57
 36
Other74
 71
Total current liabilities1,580
 728
Long-Term Debt1,589
 2,039
Long-Term Debt Payable to Affiliated Companies25
 25
Other Noncurrent Liabilities   
Deferred income taxes817
 781
Asset retirement obligations87
 81
Regulatory liabilities840
 891
Accrued pension and other post-retirement benefit costs79
 59
Other93
 108
Total other noncurrent liabilities1,916
 1,920
Commitments and Contingencies   
Equity   
Common stock, $8.50 par value, 120 million shares authorized; 90 million shares outstanding at 2018 and 2017762
 762
Additional paid-in capital2,776
 2,670
Accumulated deficit(93) (269)
Total equity3,445
 3,163
Total Liabilities and Equity$8,555
 $7,875
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$176
 $192
 $228
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization and accretion271
 265
 237
Equity component of AFUDC(11) (11) (6)
Losses (Gains) on sales of other assets106
 (1) (2)
Impairment charges
 1
 
Deferred income taxes25
 90
 55
Accrued pension and other post-retirement benefit costs3
 2
 6
Contributions to qualified pension plans
 (4) (5)
Payments for asset retirement obligations(3) (7) (5)
Provision for rate refunds24
 
 
(Increase) decrease in     
Net realized and unrealized mark-to-market and hedging transactions
 
 (2)
Receivables(33) 2
 (4)
Receivables from affiliated companies19
 (4) (36)
Inventory7
 6
 (32)
Other current assets16
 (22) 79
Increase (decrease) in     
Accounts payable(19) 12
 19
Accounts payable to affiliated companies16
 (1) 10
Taxes accrued12
 11
 3
Other current liabilities14
 (19) (54)
Other assets(26) (28) (35)
Other liabilities(27) (5) (31)
Net cash provided by operating activities570
 479
 425
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(827) (686) (476)
Notes receivable from affiliated companies14
 80
 (94)
Other(89) (41) (30)
Net cash used in investing activities(902) (647) (600)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt99
 182
 341
Payments for the redemption of long-term debt(3) (2) (53)
Notes payable to affiliated companies245
 13
 (87)
Dividends to parent
 (25) (25)
Other
 (1) (2)
Net cash provided by financing activities341
 167
 174
Net increase (decrease) in cash and cash equivalents9
 (1) (1)
Cash and cash equivalents at beginning of period12
 13
 14
Cash and cash equivalents at end of period$21
 $12
 $13
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$87
 $85
 $81
Cash received from income taxes(6) (8) (46)
Significant non-cash transactions:     
Accrued capital expenditures95
 82
 83
Non-cash equity contribution from parent106
 
 
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY OHIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
   Additional
    
 Common
 Paid-in
 Accumulated
 Total
(in millions)Stock
 Capital
 Deficit
 Equity
Balance at December 31, 2015$762
 $2,720
 $(698) $2,784
Net income
 
 228
 228
Contribution from parent
 
 9
 9
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2016$762
 $2,695
 $(461) $2,996
Net income
 
 192
 192
Dividends to parent
 (25) 
 (25)
Balance at December 31, 2017$762

$2,670

$(269)
$3,163
Net income
 
 176
 176
Contribution from parent
 106
 
 106
Balance at December 31, 2018$762
 $2,776
 $(93) $3,445
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Duke Energy Indiana, LLC
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Duke Energy Indiana, LLC and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 2002.




FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31,
(in millions)2018
 2017
 2016
Operating Revenues$3,059
 $3,047
 $2,958
Operating Expenses     
Fuel used in electric generation and purchased power1,000

966
 909
Operation, maintenance and other788

743
 727
Depreciation and amortization520

458
 496
Property and other taxes78

76
 58
Impairment charges30

18
 8
Total operating expenses2,416
 2,261
 2,198
Gains on Sales of Other Assets and Other, net
 
 1
Operating Income643
 786
 761
Other Income and Expenses, net45
 47
 26
Interest Expense167
 178
 181
Income Before Income Taxes521

655

606
Income Tax Expense128
 301
 225
Net Income$393

$354

$381
Other Comprehensive Loss, net of tax     
Reclassification into earnings from cash flow hedges
 
 (1)
Comprehensive Income$393

$354

$380
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$24
 $9
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)52
 57
Receivables from affiliated companies122
 125
Inventory422

450
Regulatory assets175
 165
Other35
 30
Total current assets830
 836
Property, Plant and Equipment   
Cost15,443
 14,948
Accumulated depreciation and amortization(4,914) (4,662)
Net property, plant and equipment10,529
 10,286
Other Noncurrent Assets  
Regulatory assets982
 978
Other194
 189
Total other noncurrent assets1,176
 1,167
Total Assets$12,535
 $12,289
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$200
 $196
Accounts payable to affiliated companies83
 78
Notes payable to affiliated companies167
 161
Taxes accrued43
 95
Interest accrued58
 57
Current maturities of long-term debt63
 3
Asset retirement obligations109
 54
Regulatory liabilities25
 24
Other107
 104
Total current liabilities855
 772
Long-Term Debt3,569
 3,630
Long-Term Debt Payable to Affiliated Companies150
 150
Other Noncurrent Liabilities   
Deferred income taxes1,009
 925
Asset retirement obligations613
 727
Regulatory liabilities1,722
 1,723
Accrued pension and other post-retirement benefit costs115
 76
Investment tax credits147
 147
Other16
 18
Total other noncurrent liabilities3,622
 3,616
Commitments and Contingencies   
Equity   
Member's Equity4,339
 4,121
Total Liabilities and Equity$12,535
 $12,289
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31,
(in millions)2018
 2017
 2016
CASH FLOWS FROM OPERATING ACTIVITIES     
Net income$393
 $354
 $381
Adjustments to reconcile net income to net cash provided by operating activities:     
Depreciation, amortization, and accretion524
 462
 499
Equity component of AFUDC(32) (28) (16)
Impairment charges30
 18
 8
Deferred income taxes95
 152
 213
Accrued pension and other post-retirement benefit costs7
 2
 8
Contributions to qualified pension plans(8) 
 (9)
Payments for asset retirement obligations(69) (45) (46)
Provision for rate refunds53
 
 
(Increase) decrease in     
Receivables7
 59
 (2)
Receivables from affiliated companies3
 (11) (43)
Inventory28
 54
 66
Other current assets(25) 28
 (67)
Increase (decrease) in     
Accounts payable37
 (86) 8
Accounts payable to affiliated companies5
 4
 (9)
Taxes accrued(52) 64
 (4)
Other current liabilities14
 (10) (81)
Other assets29
 (28) (27)
Other liabilities(33) (20) (8)
Net cash provided by operating activities1,006
 969
 871
CASH FLOWS FROM INVESTING ACTIVITIES     
Capital expenditures(832) (840) (755)
Purchases of debt and equity securities(48) (20) (14)
Proceeds from sales and maturities of debt and equity securities44
 7
 11
Proceeds from the sales of other assets15
 
 
Notes receivable from affiliated companies
 86
 (3)
Other3
 (65) 32
Net cash used in investing activities(818) (832) (729)
CASH FLOWS FROM FINANCING ACTIVITIES     
Proceeds from the issuance of long-term debt
 
 494
Payments for the redemption of long-term debt(3) (5) (478)
Notes payable to affiliated companies6
 161
 
Distributions to parent(175) (300) (149)
Other(1) (1) (1)
Net cash used in financing activities(173) (145) (134)
Net increase (decrease) in cash and cash equivalents15
 (8) 8
Cash and cash equivalents at beginning of period9
 17
 9
Cash and cash equivalents at end of period$24
 $9
 $17
Supplemental Disclosures:     
Cash paid for interest, net of amount capitalized$162
 $179
 $171
Cash paid for (received from) income taxes75
 117
 (7)
Significant non-cash transactions:     
Accrued capital expenditures88
 125
 99
See Notes to Consolidated Financial Statements



FINANCIAL STATEMENTS


DUKE ENERGY INDIANA, LLC
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
         Accumulated  
         Other  
         Comprehensive  
         Income  
   Additional
     Net Gains on
  
 Common
 Paid-in
 Retained
 Member's
 Cash Flow
 Total
(in millions)Stock
 Capital
 Earnings
 Equity
 Hedges
 Equity
Balance at December 31, 2015$1
 $1,384
 $2,450
 $
 $1
 $3,836
Net income
 
 
 381
 
 381
Other comprehensive loss
 
 
 
 (1) (1)
Distributions to parent
 
 
 (149) 
 (149)
Transfer to Member's Equity(1) (1,384) (2,450) 3,835
 
 
Balance at December 31, 2016$

$

$

$4,067
 $

$4,067
Net income
 
 
 354
 
 354
Distributions to parent
 
 
 (300) 
 (300)
Balance at December 31, 2017$

$

$

$4,121
 $

$4,121
Net income
 
 
 393
 
 393
Distributions to parent
 
 
 (175) 
 (175)
Balance at December 31, 2018$

$

$

$4,339
 $

$4,339
See Notes to Consolidated Financial Statements



REPORTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholder and the Board of Directors of Piedmont Natural Gas Company, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Piedmont Natural Gas Company, Inc. and subsidiaries (the "Company") as of December 31, 2018 and 2017, the related consolidated statements of operations and comprehensive income, changes in equity, and cash flows, for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31 2016, and for the two months ended December 31, 2016 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the periods ended December 31, 2018, December 31, 2017, October 31, 2016, and for the two months ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Emphasis of Matter
As discussed in Note 1 to the financial statements, effective for fiscal year 2016, the Company changed its fiscal year end from October 31 to December 31. This resulted in a two-month transition period beginning November 1, 2016 through December 31, 2016.



/s/ Deloitte & Touche LLP
Charlotte, North Carolina
February 28, 2019
We have served as the Company's auditor since 1951.




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
 Years Ended December 31, Two Months Ended
December 31,
 Year Ended
October 31,
(in millions)2018
 2017
 2016
 2016
Operating Revenues       
Regulated natural gas$1,365
 $1,319
 $320
 $1,139
Nonregulated natural gas and other10
 9
 2
 10
Total operating revenues1,375
 1,328
 322
 1,149
Operating Expenses       
Cost of natural gas584
 524
 144
 391
Operation, maintenance and other357
 304
 50
 353
Depreciation and amortization159
 148
 23
 137
Property and other taxes49
 48
 7
 43
Impairment charges
 7
 
 
Total operating expenses1,149
 1,031

224
 924
Operating Income226
 297

98
 225
Equity in earnings (losses) of unconsolidated affiliates7
 (6) 2
 29
Gain on sale of unconsolidated affiliates
 
 
 133
Other income and expense, net14
 (11) (2) (1)
Total other income and expenses21
 (17)

 161
Interest Expense81
 79
 12
 69
Income Before Income Taxes166
 201

86
 317
Income Tax Expense37
 62
 32
 124
Net Income$129
 $139

$54
 $193
Other Comprehensive Income, net of tax       
Unrealized loss from hedging activities of equity method investments
 
 
 (3)
Reclassification into earnings from hedging activities of equity method investments
 
 
 4
Other Comprehensive Income, net of tax
 
 
 1
Comprehensive Income$129
 $139
 $54
 $194
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED BALANCE SHEETS
 December 31,
(in millions)2018
 2017
ASSETS   
Current Assets   
Cash and cash equivalents$
 $19
Receivables (net of allowance for doubtful accounts of $2 at 2018 and 2017)266
 275
Receivables from affiliated companies22
 7
Inventory70
 66
Regulatory assets54
 95
Other19
 52
Total current assets431
 514
Property, Plant and Equipment   
Cost7,486
 6,725
Accumulated depreciation and amortization(1,575) (1,479)
Net property, plant and equipment5,911
 5,246
Other Noncurrent Assets   
Goodwill49
 49
Regulatory assets303
 283
Investments in equity method unconsolidated affiliates64
 61
Other52
 65
Total other noncurrent assets468
 458
Total Assets$6,810
 $6,218
LIABILITIES AND EQUITY   
Current Liabilities   
Accounts payable$203
 $125
Accounts payable to affiliated companies38
 13
Notes payable to affiliated companies198
 364
Taxes accrued84
 19
Interest accrued31
 31
Current maturities of long-term debt350
 250
Regulatory liabilities37
 3
Other58
 69
Total current liabilities999
 874
Long-Term Debt1,788
 1,787
Other Noncurrent Liabilities   
Deferred income taxes551
 564
Asset retirement obligations19
 15
Regulatory liabilities1,181
 1,141
Accrued pension and other post-retirement benefit costs4
 5
Other177
 170
Total other noncurrent liabilities1,932
 1,895
Commitments and Contingencies   
Equity   
Common stock, no par value: 100 shares authorized and outstanding at 2018 and 20171,160
 860
Retained earnings931
 802
Total equity2,091
 1,662
Total Liabilities and Equity$6,810
 $6,218

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Years Ended December 31, Two Months Ended December 31, Year Ended October 31,
(in millions)2018
 2017
 2016
 2016
CASH FLOWS FROM OPERATING ACTIVITIES       
Net income$129
 $139
 $54
 $193
Adjustments to reconcile net income to net cash provided by operating activities:       
Depreciation and amortization161
 151
 25
 148
Gains on sales of other assets
 
 
 (133)
Impairment charges
 7
 
 
Deferred income taxes(31) 154
 26
 74
Equity in (earnings) losses from unconsolidated affiliates(7) 6
 (2) (29)
Accrued pension and other post-retirement benefit costs(4) 23
 5
 3
Contributions to qualified pension plans
 (11) (10) (14)
Payments for asset retirement obligations
 
 (1) (6)
Provision for rate refunds43
 
 
 
(Increase) decrease in       
Receivables7
 (40) (157) 12
Receivables from affiliated companies(15) 
 
 (7)
Inventory(4) 
 (11) 14
Other current assets71
 (20) 8
 (98)
Increase (decrease) in       
Accounts payable15
 (13) 35
 6
Accounts payable to affiliated companies25
 5
 4
 6
Taxes accrued65
 (48) (2) 38
Other current liabilities21
 (9) 2
 28
Other assets6
 7
 (7) (91)
Other liabilities(4) (2) 5
 180
Net cash provided by (used in) operating activities478
 349
 (26) 324
CASH FLOWS FROM INVESTING ACTIVITIES       
Capital expenditures(721) (585) (113) (522)
Contributions to equity method investments
 (12) (12) (47)
Proceeds from the sales of other assets
 
 
 175
Other(10) (6) 1
 5
Net cash used in investing activities(731) (603) (124) (389)
CASH FLOWS FROM FINANCING ACTIVITIES       
Proceeds from the:       
Issuance of long-term debt100
 250
 
 295
Issuance of common stock
 
 
 122
Payments for the redemption of long-term debt
 (35) 
 (40)
Notes payable and commercial paper
 (330) 185
 (195)
Notes payable to affiliated companies(166) 364
 
 
Capital contribution from parent300
 
 
 
Dividends to parent
 
 (27) 
Dividends paid
 
 
 (114)
Other
 (1) 
 
Net cash provided by financing activities234
 248
 158
 68
Net (decrease) increase in cash and cash equivalents(19) (6) 8
 3
Cash and cash equivalents at beginning of period19
 25
 17
 14
Cash and cash equivalents at end of period$
 $19
 $25
 $17
Supplemental Disclosures:       
Cash paid for interest, net of amount capitalized$79
 $78
 $11
 $81
Cash received from income taxes(16) (12) 
 (25)
Significant non-cash transactions:       
Accrued capital expenditures96
 34
 48
 63
Transfer of ownership interest of certain equity method investees to parent
 149
 
 

See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTS


PIEDMONT NATURAL GAS COMPANY, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
     Accumulated  
     Other  
       Comprehensive   
     Income (Loss)  
     Net Gain on
  
     Hedging Activities
  
 Common
 Retained
 of Unconsolidated
 Total
(in millions)Stock
 Earnings
 Affiliates
 Equity
Balance at October 31, 2015$721
 $706
 $(1) $1,426
Net income  
 193
 
 193
Other comprehensive income
 
 1
 1
Common stock issuances, including dividend reinvestment and employee benefits139
 
 
 139
Common stock dividends
 (114) 
 (114)
Balance at October 31, 2016$860
 $785
 $
 $1,645
Net income
 54
 
 54
Dividends to parent
 (27) 
 (27)
Balance at December 31, 2016$860
 $812
 $
 $1,672
Net income
 139
 
 139
Transfer of ownership interest of certain equity method investees to parent
 (149) 
 (149)
Balance at December 31, 2017$860
 $802
 $
 $1,662
Net income  

 129
 
 129
Contribution from parent300
 
 
 300
Balance at December 31, 2018$1,160
 $931
 $
 $2,091
See Notes to Consolidated Financial Statements




FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Index to Combined Notes To Consolidated Financial Statements
The notes to the consolidated financial statements are a combined presentation. The following table indicates the registrants to which the notes apply.
 Applicable Notes
Registrant1234567891011121314151617181920212223242526
Duke Energy 
Duke Energy Carolinas   
Progress Energy    
Duke Energy Progress     
Duke Energy Florida     
Duke Energy Ohio     
Duke Energy Indiana    
Piedmont     
Tables within the notes may not sum across due to (i) Progress Energy's consolidation of Duke Energy Progress, Duke Energy Florida and other subsidiaries that are not registrants and (ii) subsidiaries that are not registrants but included in the consolidated Duke Energy balances.
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Nature of Operations and Basis of Consolidation
Duke Energy is an energy company headquartered in Charlotte, North Carolina, subject to regulation by the FERC and other regulatory agencies listed below. Duke Energy operates in the U.S. primarily through its direct and indirect subsidiaries. Certain Duke Energy subsidiaries are also subsidiary registrants, including Duke Energy Carolinas; Progress Energy; Duke Energy Progress; Duke Energy Florida; Duke Energy Ohio; Duke Energy Indiana and Piedmont. When discussing Duke Energy’s consolidated financial information, it necessarily includes the results of its separate Subsidiary Registrants, which along with Duke Energy, are collectively referred to as the Duke Energy Registrants.
In October 2016, Duke Energy completed the acquisition of Piedmont. Duke Energy's consolidated financial statements include Piedmont's results of operations and cash flows activity subsequent to the acquisition date. Effective November 1, 2016, Piedmont's fiscal year-end was changed from October 31 to December 31, the year-end of Duke Energy. A transition report was filed on Form 10-Q (Form 10-QT) for the transition period from November 1, 2016, to December 31, 2016. See Note 2 for additional information regarding the acquisition.
In December 2016, Duke Energy completed an exit of the Latin American market to focus on its domestic regulated business, which was further bolstered by the acquisition of Piedmont. The sale of the International Energy business segment, excluding an equity method investment in NMC, was completed through two transactions including a sale of assets in Brazil to CTG and a sale of Duke Energy's remaining Latin American assets in Peru, Chile, Ecuador, Guatemala, El Salvador and Argentina to I Squared (collectively, the International Disposal Group). See Note 2 for additional information on the sale of International Energy.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Consolidated Financial Statements. However, none of the Subsidiary Registrants make any representation as to information related solely to Duke Energy or the Subsidiary Registrants of Duke Energy other than itself.
These Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 17 for additional information on VIEs. These Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. See Note 8 for additional information on joint ownership. Substantially all of the Subsidiary Registrants' operations qualify for regulatory accounting.
Duke Energy Carolinas is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Carolinas is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Progress Energy is a public utility holding company, which conducts operations through its wholly owned subsidiaries, Duke Energy Progress and Duke Energy Florida. Progress Energy is subject to regulation by FERC and other regulatory agencies listed below.
Duke Energy Progress is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of North Carolina and South Carolina. Duke Energy Progress is subject to the regulatory provisions of the NCUC, PSCSC, NRC and FERC.
Duke Energy Florida is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Florida. Duke Energy Florida is subject to the regulatory provisions of the FPSC, NRC and FERC.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Duke Energy Ohio is a regulated public utility primarily engaged in the transmission and distribution of electricity in portions of Ohio and Kentucky, the generation and sale of electricity in portions of Kentucky and the transportation and sale of natural gas in portions of Ohio and Kentucky. Duke Energy Ohio conducts competitive auctions for retail electricity supply in Ohio whereby the energy price is recovered from retail customers and recorded in Operating Revenues on the Consolidated Statements of Operations and Comprehensive Income. Operations in Kentucky are conducted through its wholly owned subsidiary, Duke Energy Kentucky. References herein to Duke Energy Ohio collectively include Duke Energy Ohio and its subsidiaries, unless otherwise noted. Duke Energy Ohio is subject to the regulatory provisions of the PUCO, KPSC and FERC.
Duke Energy Indiana is a regulated public utility primarily engaged in the generation, transmission, distribution and sale of electricity in portions of Indiana. Duke Energy Indiana is subject to the regulatory provisions of the IURC and FERC.
Piedmont is a regulated public utility primarily engaged in the distribution of natural gas in portions of North Carolina, South Carolina and Tennessee. Piedmont is subject to the regulatory provisions of the NCUC, PSCSC, TPUC and FERC.
Certain prior year amounts have been reclassified to conform to the current year presentation.
Other Current Assets and Liabilities
The following table provides a description of amounts included in Other within Current Assets or Current Liabilities that exceed 5 percent of total Current Assets or Current Liabilities on the Duke Energy Registrants' Consolidated Balance Sheets at either December 31, 2018, or 2017.
   December 31,
(in millions)Location 2018
 2017
Duke Energy     
Income taxes receivableCurrent Assets $729
 $330
Accrued compensationCurrent Liabilities 793
 757
Duke Energy Carolinas     
Accrued compensationCurrent Liabilities $251
 $252
Progress Energy   
  
Income taxes receivableCurrent Assets $66
 $278
Customer depositsCurrent Liabilities 345
 338
Duke Energy Progress   
  
Customer depositsCurrent Liabilities $137
 $129
Accrued compensationCurrent Liabilities 130
 132
Duke Energy Florida   
  
Customer depositsCurrent Liabilities $208
 $208
Other accrued liabilitiesCurrent Liabilities 85
 16
Duke Energy Ohio   
  
Income taxes receivableCurrent Assets $13
 $36
Customer depositsCurrent Liabilities 44
 46
Duke Energy Indiana   
  
Customer depositsCurrent Liabilities $47
 $45
Piedmont     
Income taxes receivableCurrent Assets $11
 $43
Discontinued Operations
The results of operations of the International Disposal Group have been classified as Discontinued Operations on Duke Energy's Consolidated Statements of Operations. Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these consolidated financial statements exclude amounts related to discontinued operations for all periods presented. See Note 2 for additional information.
Amounts Attributable to Controlling Interests
For the years ended December 31, 2018, and 2017, the Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statements of Operations is entirely attributable to controlling interest. For the year ended December 31, 2016, $18 million of net income is attributable to noncontrolling interests, which consisted of $7 million included in Income from Continuing Operations and $11 million included in Income (Loss) From Discontinued Operations, net of tax on Duke Energy's Consolidated Statement of Operations.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Significant Accounting Policies
Use of Estimates
In preparing financial statements that conform to GAAP, the Duke Energy Registrants must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Regulatory Accounting
The majority of the Duke Energy Registrants’ operations are subject to price regulation for the sale of electricity and natural gas by state utility commissions or FERC. When prices are set on the basis of specific costs of the regulated operations and an effective franchise is in place such that sufficient natural gas or electric services can be sold to recover those costs, the Duke Energy Registrants apply regulatory accounting. Regulatory accounting changes the timing of the recognition of costs or revenues relative to a company that does not apply regulatory accounting. As a result, regulatory assets and regulatory liabilities are recognized on the Consolidated Balance Sheets. Regulatory assets and liabilities are amortized consistent with the treatment of the related cost in the ratemaking process. See Note 4 for further information.
Regulatory accounting rules also require recognition of a disallowance (also called "impairment") loss if it becomes probable that part of the cost of a plant under construction (or a recently completed plant or an abandoned plant) will be disallowed for ratemaking purposes and a reasonable estimate of the amount of the disallowance can be made. For example, if a cost cap is set for a plant still under construction, the amount of the disallowance is a result of a judgment as to the ultimate cost of the plant. These disallowances can require judgments on allowed future rate recovery.
When it becomes probable that regulated generation, transmission or distribution assets will be abandoned, the cost of the asset is removed from plant in service. The value that may be retained as a regulatory asset on the balance sheet for the abandoned property is dependent upon amounts that may be recovered through regulated rates, including any return. As such, an impairment charge could be partially or fully offset by the establishment of a regulatory asset if rate recovery is probable. The impairment charge for a disallowance of costs for regulated plants under construction, recently completed or abandoned is based on discounted cash flows.
The Duke Energy Registrants utilize cost-tracking mechanisms, commonly referred to as fuel adjustment clauses or PGA clauses. These clauses allow for the recovery of fuel and fuel-related costs, portions of purchased power, natural gas costs and hedging costs through surcharges on customer rates. The difference between the costs incurred and the surcharge revenues is recorded either as an adjustment to Operating Revenues, Operating Expenses – Fuel used in electric generation or Operating Expenses – Cost of natural gas on the Consolidated Statements of Operations, with an off-setting impact on regulatory assets or liabilities.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Cash, Cash Equivalents and Restricted Cash
All highly liquid investments with maturities of three months or less at the date of acquisition are considered cash equivalents. Duke Energy, Progress Energy and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Note 17 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Consolidated Balance Sheets.
 December 31, 2018 December 31, 2017
   Duke
   Duke
 Duke
Progress
Energy
 Duke
Progress
Energy
 Energy
Energy
Florida
 Energy
Energy
Florida
Current Assets       
Cash and cash equivalents$442
$67
$36
 $358
$40
$13
Other141
39
39
 138
40
40
Other Noncurrent Assets       
Other8
6

 9
7

Total cash, cash equivalents and restricted cash$591
$112
$75
 $505
$87
$53
Inventory
Inventory is used for operations and is recorded primarily using the average cost method. Inventory related to regulated operations is valued at historical cost. Inventory related to nonregulated operations is valued at the lower of cost or market. Materials and supplies are recorded as inventory when purchased and subsequently charged to expense or capitalized to property, plant and equipment when installed. Inventory, including excess or obsolete inventory, is written-down to the lower of cost or market value. Once inventory has been written-down, it creates a new cost basis for the inventory that is not subsequently written-up. Provisions for inventory write-offs were not material at December 31, 2018, and 2017. The components of inventory are presented in the tables below.
 December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,238
 $731
 $1,049
 $734
 $315
 $84
 $312
 $2
Coal491
 175
 192
 106
 86
 14
 109
 
Natural gas, oil and other355
 42
 218
 114
 103
 28
 1
 68
Total inventory$3,084
 $948
 $1,459
 $954
 $504
 $126
 $422
 $70
 December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Materials and supplies$2,293
 $744
 $1,118
 $774
 $343
 $82
 $309
 $2
Coal603
 192
 255
 139
 116
 17
 139
 
Natural gas, oil and other354
 35
 219
 104
 115
 34
 2
 64
Total inventory$3,250
 $971
 $1,592
 $1,017
 $574
 $133
 $450
 $66
Investments in Debt and Equity Securities
The Duke Energy Registrants classify investments in equity securities as FV-NI and investments in debt securities as AFS. Both categories are recorded at fair value on the Consolidated Balance Sheets. Realized and unrealized gains and losses on securities classified as FV-NI are reported through net income. Unrealized gains and losses for debt securities classified as AFS are included in AOCI until realized, except OTTIs that are included in earnings immediately. At the time gains and losses for debt securities are realized, they are reported through net income. For certain investments of regulated operations, such as substantially all of the NDTF, realized and unrealized gains and losses (including any OTTIs) on debt securities are recorded as a regulatory asset or liability. The credit loss portion of debt securities of nonregulated operations are included in earnings. Investments in debt and equity securities are classified as either current or noncurrent based on management’s intent and ability to sell these securities, taking into consideration current market liquidity. See Note 15 for further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Goodwill and Intangible Assets
Goodwill
Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont perform annual goodwill impairment tests as of August 31 each year at the reporting unit level, which is determined to be a business segment or one level below. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update these tests between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. See Note 11 for further information.
Intangible Assets
Intangible assets are included in Other in Other Noncurrent Assets on the Consolidated Balance Sheets. Generally, intangible assets are amortized using an amortization method that reflects the pattern in which the economic benefits of the intangible asset are consumed or on a straight-line basis if that pattern is not readily determinable. Amortization of intangibles is reflected in Depreciation and amortization on the Consolidated Statements of Operations. Intangible assets are subject to impairment testing and if impaired, the carrying value is accordingly reduced.
Emission allowances permit the holder of the allowance to emit certain gaseous byproducts of fossil fuel combustion, including SO2 and NOX. Allowances are issued by the EPA at zero cost and may also be bought and sold via third-party transactions. Allowances allocated to or acquired by the Duke Energy Registrants are held primarily for consumption. Carrying amounts for emission allowances are based on the cost to acquire the allowances or, in the case of a business combination, on the fair value assigned in the allocation of the purchase price of the acquired business. Emission allowances are expensed to Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.
RECs are used to measure compliance with renewable energy standards and are held primarily for consumption. See Note 11 for further information.
Long-Lived Asset Impairments
The Duke Energy Registrants evaluate long-lived assets, excluding goodwill, for impairment when circumstances indicate the carrying value of those assets may not be recoverable. An impairment exists when a long-lived asset’s carrying value exceeds the estimated undiscounted cash flows expected to result from the use and eventual disposition of the asset. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. If the carrying value of the long-lived asset is not recoverable based on these estimated future undiscounted cash flows, the carrying value of the asset is written-down to its then-current estimated fair value and an impairment charge is recognized.
The Duke Energy Registrants assess fair value of long-lived assets using various methods, including recent comparable third-party sales, internally developed discounted cash flow analysis and analysis from outside advisors. Triggering events to reassess cash flows may include, but are not limited to, significant changes in commodity prices, the condition of an asset or management’s interest in selling the asset.
Equity Method Investment Impairments
Investments in affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method. Equity method investments are assessed for impairment whenever events or changes in circumstances indicate that the carrying amount of the investment may not be recoverable. If the decline in value is considered to be other than temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment.
Impairment assessments use a discounted cash flow income approach and include consideration of the severity and duration of any decline in the fair value of the investments. The estimated cash flows may be based on alternative expected outcomes that are probability weighted. Key inputs that involve estimates and significant management judgment include cash flow projections, selection of a discount rate, probability weighting of potential outcomes, and whether any decline in value is considered temporary.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Property, Plant and Equipment
Property, plant and equipment are stated at the lower of depreciated historical cost net of any disallowances or fair value, if impaired. The Duke Energy Registrants capitalize all construction-related direct labor and material costs, as well as indirect construction costs such as general engineering, taxes and financing costs. See “Allowance for Funds Used During Construction and Interest Capitalized” for information on capitalized financing costs. Costs of renewals and betterments that extend the useful life of property, plant and equipment are also capitalized. The cost of repairs, replacements and major maintenance projects, which do not extend the useful life or increase the expected output of the asset, are expensed as incurred. Depreciation is generally computed over the estimated useful life of the asset using the composite straight-line method. Depreciation studies are conducted periodically to update composite rates and are approved by state utility commissions and/or the FERC when required. The composite weighted average depreciation rates, excluding nuclear fuel, are included in the table that follows.
 Years Ended December 31,
 2018
 2017
 2016
Duke Energy3.0% 2.8% 2.8%
Duke Energy Carolinas2.8% 2.8% 2.8%
Progress Energy2.9% 2.6% 2.7%
Duke Energy Progress2.9% 2.6% 2.6%
Duke Energy Florida3.0% 2.8% 2.8%
Duke Energy Ohio2.8% 2.8% 2.6%
Duke Energy Indiana3.3% 3.0% 3.1%
Piedmont(a)
2.5% 2.3%  
(a)Piedmont's weighted average depreciation rate was 2.4 percent for the annualized two months ended December 31, 2016, and for the year ended October 31, 2016.
In general, when the Duke Energy Registrants retire regulated property, plant and equipment, the original cost plus the cost of retirement, less salvage value and any depreciation already recognized, is charged to accumulated depreciation. However, when it becomes probable the asset will be retired substantially in advance of its original expected useful life or is abandoned, the cost of the asset and the corresponding accumulated depreciation is recognized as a separate asset. If the asset is still in operation, the net amount is classified as Generation facilities to be retired, net on the Consolidated Balance Sheets. If the asset is no longer operating, the net amount is classified in Regulatory assets on the Consolidated Balance Sheets if deemed recoverable (see discussion of long-lived asset impairments above). When it becomes probable an asset will be abandoned, the cost of the asset and accumulated depreciation is reclassified to Regulatory assets on the Consolidated Balance Sheets for amounts recoverable in rates. The carrying value of the asset is based on historical cost if the Duke Energy Registrants are allowed to recover the remaining net book value and a return equal to at least the incremental borrowing rate. If not, an impairment is recognized to the extent the net book value of the asset exceeds the present value of future revenues discounted at the incremental borrowing rate.
When the Duke Energy Registrants sell entire regulated operating units, or retire or sell nonregulated properties, the original cost and accumulated depreciation and amortization balances are removed from Property, Plant and Equipment on the Consolidated Balance Sheets. Any gain or loss is recorded in earnings, unless otherwise required by the applicable regulatory body. See Note 10 for additional information.
Nuclear Fuel
Nuclear fuel is classified as Property, Plant and Equipment on the Consolidated Balance Sheets.
Nuclear fuel in the front-end fuel processing phase is considered work in progress and not amortized until placed in service. Amortization of nuclear fuel is included within Fuel used in electric generation and purchased power on the Consolidated Statements of Operations. Amortization is recorded using the units-of-production method.
Allowance for Funds Used During Construction and Interest Capitalized
For regulated operations, the debt and equity costs of financing the construction of property, plant and equipment are reflected as AFUDC and capitalized as a component of the cost of property, plant and equipment. AFUDC equity is reported on the Consolidated Statements of Operations as non-cash income in Other income and expenses, net. AFUDC debt is reported as a non-cash offset to Interest Expense. After construction is completed, the Duke Energy Registrants are permitted to recover these costs through their inclusion in rate base and the corresponding subsequent depreciation or amortization of those regulated assets.
AFUDC equity, a permanent difference for income taxes, reduces the ETR when capitalized and increases the ETR when depreciated or amortized. See Note 23 for additional information.
For nonregulated operations, interest is capitalized during the construction phase with an offsetting non-cash credit to Interest Expense on the Consolidated Statements of Operations.
Asset Retirement Obligations
AROs are recognized for legal obligations associated with the retirement of property, plant and equipment. Substantially all AROs are related to regulated operations. When recording an ARO, the present value of the projected liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made. The liability is accreted over time. For operating plants, the present value of the liability is added to the cost of the associated asset and depreciated over the remaining life of the asset. For retired plants, the present value of the liability is recorded as a regulatory asset unless determined not to be probable of recovery.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


The present value of the initial obligation and subsequent updates are based on discounted cash flows, which include estimates regarding timing of future cash flows, selection of discount rates and cost escalation rates, among other factors. These estimates are subject to change. Depreciation expense is adjusted prospectively for any changes to the carrying amount of the associated asset. The Duke Energy Registrants receive amounts to fund the cost of the ARO for regulated operations through a combination of regulated revenues and earnings on the NDTF. As a result, amounts recovered in regulated revenues, earnings on the NDTF, accretion expense and depreciation of the associated asset are netted and deferred as a regulatory asset or liability.
Obligations for nuclear decommissioning are based on site-specific cost studies. Duke Energy Carolinas and Duke Energy Progress assume prompt dismantlement of the nuclear facilities after operations are ceased. Duke Energy Florida assumes Crystal River Unit 3 will be placed into a safe storage configuration until eventual dismantlement is completed by 2074. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida also assume that spent fuel will be stored on-site until such time that it can be transferred to a yet to be built DOE facility.
Obligations for closure of ash basins are based upon discounted cash flows of estimated costs for site-specific plans, if known, or probability weightings of the potential closure methods if the closure plans are under development and multiple closure options are being considered and evaluated on a site-by-site basis. See Note 9 for additional information.
Revenue Recognition
Duke Energy recognizes revenue as customers obtain control of promised goods and services in an amount that reflects consideration expected in exchange for those goods or services. Generally, the delivery of electricity and natural gas results in the transfer of control to customers at the time the commodity is delivered and the amount of revenue recognized is equal to the amount billed to each customer, including estimated volumes delivered when billings have not yet occurred. See Note 18 for further information.
Derivatives and Hedging
Derivative and non-derivative instruments may be used in connection with commodity price and interest rate activities, including swaps, futures, forwards and options. All derivative instruments, except those that qualify for the NPNS exception, are recorded on the Consolidated Balance Sheets at fair value. Qualifying derivative instruments may be designated as either cash flow hedges or fair value hedges. Other derivative instruments (undesignated contracts) either have not been designated or do not qualify as hedges. The effective portion of the change in the fair value of cash flow hedges is recorded in AOCI. The effective portion of the change in the fair value of a fair value hedge is offset in net income by changes in the hedged item. For activity subject to regulatory accounting, gains and losses on derivative contracts are reflected as regulatory assets or liabilities and not as other comprehensive income or current period income. As a result, changes in fair value of these derivatives have no immediate earnings impact.
Formal documentation, including transaction type and risk management strategy, is maintained for all contracts accounted for as a hedge. At inception and at least every three months thereafter, the hedge contract is assessed to see if it is highly effective in offsetting changes in cash flows or fair values of hedged items.
See Note 14 for further information.
Captive Insurance Reserves
Duke Energy has captive insurance subsidiaries that provide coverage, on an indemnity basis, to the Subsidiary Registrants as well as certain third parties, on a limited basis, for financial losses, primarily related to property, workers’ compensation and general liability. Liabilities include provisions for estimated losses IBNR, as well as estimated provisions for known claims. IBNR reserve estimates are primarily based upon historical loss experience, industry data and other actuarial assumptions. Reserve estimates are adjusted in future periods as actual losses differ from experience.
Duke Energy, through its captive insurance entities, also has reinsurance coverage with third parties for certain losses above a per occurrence and/or aggregate retention. Receivables for reinsurance coverage are recognized when realization is deemed probable.
Unamortized Debt Premium, Discount and Expense
Premiums, discounts and expenses incurred with the issuance of outstanding long-term debt are amortized over the term of the debt issue. The gain or loss on extinguishment associated with refinancing higher-cost debt obligations in the regulated operations is amortized. Amortization expense is recorded as Interest Expense in the Consolidated Statements of Operations and is reflected as Depreciation, amortization and accretion within Net cash provided by operating activities on the Consolidated Statements of Cash Flows.
Premiums, discounts and expenses are presented as an adjustment to the carrying value of the debt amount and included in Long-Term Debt on the Consolidated Balance Sheets presented.
Loss Contingencies and Environmental Liabilities
Contingent losses are recorded when it is probable a loss has occurred and can be reasonably estimated. When a range of the probable loss exists and no amount within the range is a better estimate than any other amount, the minimum amount in the range is recorded. Unless otherwise required by GAAP, legal fees are expensed as incurred.
Environmental liabilities are recorded on an undiscounted basis when environmental remediation or other liabilities become probable and can be reasonably estimated. Environmental expenditures related to past operations that do not generate current or future revenues are expensed. Environmental expenditures related to operations that generate current or future revenues are expensed or capitalized, as appropriate. Certain environmental expenditures receive regulatory accounting treatment and are recorded as regulatory assets.
See Notes 4 and 5 for further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Pension and Other Post-Retirement Benefit Plans
Duke Energy maintains qualified, non-qualified and other post-retirement benefit plans. Eligible employees of the Subsidiary Registrants participate in the respective qualified, non-qualified and other post-retirement benefit plans and the Subsidiary Registrants are allocated their proportionate share of benefit costs. See Note 22 for further information, including significant accounting policies associated with these plans.
Severance and Special Termination Benefits
Duke Energy has severance plans under which in general, the longer a terminated employee worked prior to termination the greater the amount of severance benefits. A liability for involuntary severance is recorded once an involuntary severance plan is committed to by management if involuntary severances are probable and can be reasonably estimated. For involuntary severance benefits incremental to its ongoing severance plan benefits, the fair value of the obligation is expensed at the communication date if there are no future service requirements or over the required future service period. Duke Energy also offers special termination benefits under voluntary severance programs. Special termination benefits are recorded immediately upon employee acceptance absent a significant retention period. Otherwise, the cost is recorded over the remaining service period. Employee acceptance of voluntary severance benefits is determined by management based on the facts and circumstances of the benefits being offered. See Note 20 for further information.
Guarantees
If necessary, liabilities are recognized at the time of issuance or material modification of a guarantee for the estimated fair value of the obligation it assumes. Fair value is estimated using a probability-weighted approach. The obligation is reduced over the term of the guarantee or related contract in a systematic and rational method as risk is reduced. Any additional contingent loss for guarantee contracts subsequent to the initial recognition of a liability is accounted for and recognized at the time a loss is probable and can be reasonably estimated. See Note 7 for further information.
Stock-Based Compensation
Stock-based compensation represents costs related to stock-based awards granted to employees and Board of Directors members. Duke Energy recognizes stock-based compensation based upon the estimated fair value of awards, net of estimated forfeitures at the date of issuance. The recognition period for these costs begins at either the applicable service inception date or grant date and continues throughout the requisite service period. Compensation cost is recognized as expense or capitalized as a component of property, plant and equipment. See Note 21 for further information.
Income Taxes
Duke Energy and its subsidiaries file a consolidated federal income tax return and other state and foreign jurisdictional returns. The Subsidiary Registrants are parties to a tax-sharing agreement with Duke Energy. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. Deferred income taxes have been provided for temporary differences between GAAP and tax bases of assets and liabilities because the differences create taxable or tax-deductible amounts for future periods. ITCs associated with regulated operations are deferred and amortized as a reduction of income tax expense over the estimated useful lives of the related properties.
Accumulated deferred income taxes are valued using the enacted tax rate expected to apply to taxable income in the periods in which the deferred tax asset or liability is expected to be settled or realized. In the event of a change in tax rates, deferred tax assets and liabilities are remeasured as of the enactment date of the new rate. To the extent that the change in the value of the deferred tax represents an obligation to customers, the impact of the remeasurement is deferred to a regulatory liability. Remaining impacts are recorded in income from continuing operations. If Duke Energy's estimate of the tax effect of reversing temporary differences is not reflective of actual outcomes, is modified to reflect new developments or interpretations of the tax law, revised to incorporate new accounting principles, or changes in the expected timing or manner of the reversal then Duke Energy's results of operations could be impacted.
Tax-related interest and penalties are recorded in Interest Expense and Other Income and Expenses, net in the Consolidated Statements of Operations.
See Note 23 for further information.
Accounting for Renewable Energy Tax Credits
When Duke Energy receives ITCs on wind or solar facilities, it reduces the basis of the property recorded on the Consolidated Balance Sheets by the amount of the ITC and, therefore, the ITC benefit is ultimately recognized in the statement of operations through reduced depreciation expense. Additionally, certain tax credits and government grants result in an initial tax depreciable base in excess of the book carrying value by an amount equal to one half of the ITC. Deferred tax benefits are recorded as a reduction to income tax expense in the period that the basis difference is created.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Excise Taxes
Certain excise taxes levied by state or local governments are required to be paid even if not collected from the customer. These taxes are recognized on a gross basis. Otherwise, the taxes are accounted for net. Excise taxes accounted for on a gross basis within both Operating Revenues and Property and other taxes in the Consolidated Statements of Operations were as follows.
 Years Ended December 31,
(in millions)2018
 2017
 2016
Duke Energy$405
 $376
 $362
Duke Energy Carolinas35
 36
 31
Progress Energy241
 220
 213
Duke Energy Progress19
 19
 18
Duke Energy Florida222
 201
 195
Duke Energy Ohio105
 98
 100
Duke Energy Indiana22
 20
 17
Piedmont(a)
2
 2
  
(a)Piedmont's excise taxes were immaterial for the two months ended December 31, 2016, and $2 million for the year ended October 31, 2016.
Dividend Restrictions and Unappropriated Retained Earnings
Duke Energy does not have any legal, regulatory or other restrictions on paying common stock dividends to shareholders. However, as further described in Note 4, due to conditions established by regulators in conjunction with merger transaction approvals, Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio, Duke Energy Indiana and Piedmont have restrictions on paying dividends or otherwise advancing funds to Duke Energy. At December 31, 2018, and 2017, an insignificant amount of Duke Energy’s consolidated Retained earnings balance represents undistributed earnings of equity method investments.
New Accounting Standards
The new accounting standards adopted for 20172018 and 20162017 had no material impact on the presentation or results of operations, cash flows or financial position of the Duke Energy Registrants. The following accounting standards were adopted by the Duke Energy Registrants during 2017.
Stock-Based Compensation and Income Taxes. In first quarter 2017, Duke Energy adopted Financial Accounting Standards Board (FASB) guidance, which revised the accounting for stock-based compensation and the associated income taxes. The adopted guidance changed certain aspects of accounting for stock-based payment awards to employees including the accounting for income taxes and classification on the Consolidated Statements of Cash Flows. The primary impact to Duke Energy as a result of implementing this guidance was a cumulative-effect adjustment to retained earnings for tax benefits not previously recognized and additional income tax expense for the 12 months ended December 31, 2017. See the Duke Energy Consolidated Statements of Changes in Equity for further information.
Goodwill Impairment. In January 2017, the FASB issued revised guidance for the subsequent measurement of goodwill. Under the guidance, a company will recognize an impairment to goodwill for the amount by which a reporting unit's carrying value exceeds the reporting unit's fair value, not to exceed the amount of goodwill allocated to that reporting unit. Duke Energy early adopted this guidance for the 2017 annual goodwill impairment test.
The following new accounting standards have been issued, but have not yet been adopted by the Duke Energy Registrants, as of December 31, 2017.2018.
Revenue from Contracts with CustomersCustomers.. In May 2014, the FASB issued revised accounting guidance for revenue recognition from contracts with customers. The core principle of this guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitledexpected in exchange for those goods or services. The amendments in this update also requirerequired disclosure of sufficient information to allow users to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.

136

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Duke Energy has identified material revenue streams, which served as the basis for accounting analysis and documentation of the impact of this guidance on revenue recognition. The accounting analysis included reviewing representative contracts and tariffs for each material revenue stream. Mostmajority of Duke Energy’s revenue will beis in scope of the new guidance. The majority of our sales, including energy provided to residential customers, are from tariff offerings that provide natural gas or electricity without a defined contractual term ("at-will"). For such arrangements, revenue from contracts with customers will be equivalent to the electricity or natural gas supplied and billed in that period (including estimated billings). As such, there will not be a significant shift in the timing or pattern of revenue recognition for such sales.
Also included in the accounting analysis was the evaluation of certain long-term revenue streams including electric wholesale contracts and renewables power purchase agreements (PPAs). For such arrangements, Duke Energy does not expect material changes to the pattern of revenue recognition on the registrants. In addition, Duke Energy has monitored the activities of the power and utilities industry revenue recognition task force including draft accounting positions released in October 2017 and the impact, if any, on Duke Energy’s specific contracts and conclusions. Potential revisions to processes, policies and controls, primarily related to evaluating supplemental disclosures required as a result of adopting this guidance, will be evaluated and implemented as necessary. SomeOther revenue arrangements, such as alternative revenue programs and certain PPAs and lighting agreements accounted for as leases, are excluded from the scope of the new revenue recognitionthis guidance and, therefore, will beare accounted for and evaluated for separate presentation and disclosure under other relevant accounting guidance.
Duke Energy intends to useelected the modified retrospective method of adoption effective January 1, 2018. Under the modified retrospective method of adoption, prior year reported results are not restatedrestated. Adoption of this standard did not result in a material change in the timing or pattern of revenue recognition and a cumulative-effect adjustment if applicable, iswas not recorded to retained earnings at January 1, 2018, as if the standard had always been in effect. In addition, disclosures, if applicable, include a comparison to what would have been reported for 2018 under the previous revenue recognition rules to assist financial statement users in understanding how revenue recognition has changed as a result of this standard and to facilitate comparability with prior year reported results, which are not restated under the modified retrospective approach as described above.2018. Duke Energy will utilizeutilized certain practical expedients including applying this guidance to open contracts at the date of adoption, expensing costs to obtain a contract where the amortization period of the asset would have been one year or less, ignoring the effects of a significant financing when the period between transfer of the good or service and payment is one year or less and recognizing revenues for certain contracts under the invoice practical expedient, which allows revenue recognition to be consistent with invoiced amounts (including estimated billings)unbilled estimates) provided certain criteria are met, including consideration of whether the invoiced amounts reasonably represent the value provided to customers. While
In preparation for adoption, Duke Energy identified material revenue streams and reviewed representative contracts and tariffs, including those associated with certain long-term customer contracts such as wholesale contracts, PPAs and other customer arrangements. Duke Energy also monitored the activities of the power and utilities industry revenue recognition task force and has reviewed published positions on specific industry issues to evaluate the impact, if any, on Duke Energy’s specific contracts and conclusions. Duke Energy applied the available practical expedient to portfolios of tariffs and contracts with similar characteristics. The vast majority of sales, including energy provided to retail customers, are from tariff offerings that provide natural gas or electricity without a defined contractual term ("at-will"). In most circumstances, revenue from contracts with customers is equivalent to the electricity or natural gas supplied and billed in that period (including unbilled estimates). As such, adoption of this guidance isthe new rules did not expected to haveresult in a material impact on eithershift in the timing or amountpattern of revenue recognition for such sales. While there have been changes to the captions and descriptions of revenues recognized in Duke Energy'sEnergy’s financial statements, Duke Energy anticipatesthe most significant impact as a result of adopting the standard are additional disclosures around the nature, amount, timing and uncertainty of our revenues and cash flows arising from contracts with customers. Duke Energy continues to evaluate what information will be most usefulSee Note 18 for users of the financial statements, including information already provided in disclosures outside of the financial statement footnotes. These additional disclosures are expected to include the disaggregation of revenues by customer class.further information.



FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Financial Instruments Classification and Measurement.In On January 2016, the1, 2018, Duke Energy adopted FASB issuedguidance, which revised accounting guidance for the classification and measurement of certain financial instruments. ChangesThe adopted guidance changes the presentation of realized and unrealized gains and losses in the fair value of allcertain equity securities will be required to bethat were previously recorded in AOCI. These gains and losses are now recorded in net income. Current GAAP allows some changes in fair value for available-for-sale equity securities to be recorded in AOCI. Additional disclosures will be required to present separately the financial assets and financial liabilities by measurement category and form of financial asset. An entity's equity investments that are accounted for under the equity method of accounting are not included within the scope of the new guidance.
For Duke Energy, the revised accounting guidance is effective for interim and annual periods beginning January 1, 2018, by recording a cumulative effect adjustment to retained earnings as of January 1, 2018. This guidance is expected to havehad a minimal impact on the Duke Energy Registrant's Consolidated Statements of Operations and Comprehensive Income as changes in the fair value of most of the Duke Energy Registrants' available-for-sale equity securities are deferred as regulatory assets or liabilities pursuant to accounting guidance for regulated operations. The resulting adjustment of unrealized gains and losses in AOCI to retained earnings was immaterial. The primary impact to Duke Energy as a result of implementing this guidance is adding disclosure requirements to present separately the financial assets and financial liabilities by measurement category and form of financial asset. See Notes 15 and 16 for further information.
Statement of Cash Flows. In November 2016, the FASB issued revised accounting guidance to reduce diversity in practice for the presentation and classification of restricted cash on the Consolidated Statements of Cash Flows. Under the updated guidance, restricted cash and restricted cash equivalents are included within beginning-of-period and end-of-period cash and cash equivalents on the Consolidated Statements of Cash Flows. Duke Energy adopted this guidance on January 1, 2018. The guidance has been applied using a retrospective transition method to each period presented. The adoption by Duke Energy of the revised guidance resulted in a change to the amount of Cash, cash equivalents and restricted cash explained when reconciling the beginning-of-period and end-of-period total amounts shown on the Consolidated Statements of Cash Flows. In addition, a reconciliation has been provided of Cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets that sums to the total of the same such amounts in the Consolidated Statements of Cash Flows. Prior to adoption, the Duke Energy Registrants reflected changes in noncurrent restricted cash within Cash Flows from Investing Activities and changes in current restricted cash within Cash Flows from Operating Activities on the Consolidated Statements of Cash Flows.
In August 2016, the FASB issued accounting guidance addressing diversity in practice for eight separate cash flow issues. The guidance requires entities to classify distributions received from equity method investees using either the cumulative earnings approach or the nature of the distribution approach. Duke Energy adopted this guidance on January 1, 2018, and elected the nature of distribution approach. This approach requires all distributions received to be categorized based on legal documentation describing the nature of the activities generating the distribution. Cash inflows resulting in a return on investment (surplus) will be reflected in Cash Flows from Operating Activities on the Consolidated Statements of Cash Flows, whereas cash inflows resulting in a return of investment (capital) will be reflected in Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows. The guidance has been applied using the retrospective transition method to each period presented. There are no changes to the Consolidated Statements of Cash Flows for the periods presented as a result of this accounting change.
Retirement Benefits. In March 2017, the FASB issued revised accounting guidance for the presentation of net periodic costs related to benefit plans. Previous guidance required the aggregation of all the components of net periodic costs on the Consolidated Statements of Operations and did not require the disclosure of the location of net periodic costs on the Consolidated Statements of Operations. Under the amended guidance, the service cost component of net periodic costs is included within Operating Income within the same line as other compensation expenses. All other components of net periodic costs are outside of Operating Income. In addition, the updated guidance permits only the service cost component of net periodic costs to be capitalized to Inventory or Property, Plant and Equipment. This represents a change from previous guidance, which permitted all components of net periodic costs to be eligible for capitalization.
Duke Energy adopted this guidance on January 1, 2018. Under previous guidance, Duke Energy presented the total non-capitalized net periodic costs within Operation, maintenance and other on the Consolidated Statements of Operations. The adoption of this guidance resulted in a retrospective change to reclassify the presentation of the non-service cost (benefit) components of net periodic costs to Other income and expenses. Duke Energy utilized the practical expedient for retrospective presentation. The change in components of net periodic costs eligible for capitalization is applicable prospectively. Since Duke Energy’s service cost component is greater than the total net periodic costs, the change results in increased capitalization of net periodic costs, higher Operation, maintenance and other and higher Other income and expenses. The resulting prospective impact to Duke Energy is an immaterial increase in Net Income. See Note 22 for further information.
For Duke Energy, the retrospective change resulted in higher Operation, maintenance and other and higher Other income and expenses, net, of $156 million and $139 million for the years ended December 31, 2017, and 2016, respectively. There was no change to Net Income for these prior periods.
The following new accounting standards have been issued, but have not yet been adopted by the Duke Energy Registrants, as of December 31, 2018.
Leases. In February 2016, the FASB issued revised accounting guidance for leases. The core principle of this guidance is that a lessee should recognize the assets and liabilities that arise from leases on the balance sheet.
For Duke Energy, this guidance is effective for interim and annual periods beginning January 1, 2019. The guidance iswill be applied using a modified retrospective approach. Under the modified retrospective approach of adoption, prior year reported results are not restated and a cumulative-effect adjustment, if applicable, is recorded to retained earnings at January 1, 2019. Upon adoption, agreements considered leases for the use of certain aircraft, space on communication towers, industrial equipment, fleet vehicles, fuel transportation (barges and railcars), land and office space will be recognized on the balance sheet. Duke Energy expects to electadopt the following practical expedients, which would require no reassessment of whether existing contracts are expedients:




FINANCIAL STATEMENTSSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


Practical ExpedientDescriptionElection
Package of transition practical expedients (for leases commenced prior to adoption date and must be adopted as a package)Do not need to 1) reassess whether any expired or existing contracts are/or contain leases, 2) reassess the lease classification for any expired or existing leases and 3) reassess initial direct costs for any existing leases.Duke Energy plans to elect this practical expedient.
Short-term lease expedient (elect by class of underlying asset)Elect as an accounting policy to not apply the recognition requirements to short-term leases by asset class.Duke Energy plans to elect this practical expedient for all asset classes.
Lease and non-lease components (elect by class of underlying asset)Elect as an accounting policy to not separate non-lease components from lease components and instead account for each lease and associated non-lease component as a single lease component by asset class.Duke Energy plans to elect this practical expedient for all asset classes.
Hindsight expedient (when determining lease term)Elect to use hindsight to determine the lease term.Duke Energy plans to elect this practical expedient.
Existing and expired land easements not previously accounted for as leasesElect to not evaluate existing or expired easements under the new guidance and carry forward current accounting treatment.Duke Energy plans to elect this practical expedient.
Comparative reporting requirements for initial adoption

Elect to apply transition requirements at adoption date, recognize cumulative effect adjustment to retained earnings in period of adoption and not apply ASC 842 to comparative periods, including disclosures.Duke Energy plans to elect this practical expedient.
Lessor expedient (elect by class of underlying asset)

Elect as an accounting policy to aggregate non-lease components with the related lease component when specified conditions are met by asset class. Account for the combined component based on its predominant characteristic (revenue or operating lease).Duke Energy plans to elect this practical expedient for all asset classes.
Duke Energy currently expects to record right-of-use assets and operating lease liabilities on its balance sheet as shown in approximate amounts in the table below:
 (in millions)
Duke Energy$1,700
Duke Energy Carolinas150
Progress Energy850
Duke Energy Progress400
Duke Energy Florida450
Duke Energy Ohio25
Duke Energy Indiana60
Piedmont30
In addition to the recognition of operating leases on the balance sheet, Duke Energy expects additional disclosures including both finance and operating lease costs, short-term lease costs, variable lease costs, weighted-average remaining lease term as well as no reassessment of lease classification for existing leases. Additionally, we expect to adopt the optional transition practical expedient allowing the entity not to reassess the accounting for land easements that currently exist at the adoption of the lease standard on January 1, 2019.weighted-average discount rates. Duke Energy is currently evaluating thedoes not expect a material change to its financial statement impact of adopting this standard and is continuing to monitor industry implementation issues, including easements, pole attachments and renewable PPAs. Other than an expected increase in assets and liabilities, the ultimate impactstatements from adoption of the new standard has not yet been determined. Significant system enhancements, including additional processes and controls, will be required to facilitatefor contracts where it is the identification, tracking and reporting of potential leases based upon requirements of the new lease standard. Duke Energy has begun the implementation of a third-party software tool to help with the adoption and ongoing accounting under the new standard.
Statement of Cash Flows. In November 2016, the FASB issued revised accounting guidance to reduce diversity in practice for the presentation and classification of restricted cash on the statement of cash flows. Under the updated guidance, restricted cash and restricted cash equivalents will be included within beginning-of-period and end-of-period cash and cash equivalents on the statement of cash flows.
For Duke Energy, this guidance is effective for the interim and annual periods beginning January 1, 2018. The guidance will be applied using a retrospective transition method to each period presented. Upon adoption by Duke Energy, the revised guidance will result in a change to the amount of cash and cash equivalents and restricted cash explained when reconciling the beginning-of-period and end-of-period total amounts shown on the Consolidated Statement of Cash Flows. Prior to adoption, the Duke Energy Registrants reflect changes in restricted cash within Cash Flows from Investing Activities and within Cash Flows from Operating Activities on the Consolidated Statement of Cash Flows. As a result of this change, our Cash and cash equivalents balance on the Consolidated Statement of Cash Flows as of December 31, 2017 will change by $147 million.

137

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Retirement Benefits. In March 2017, the FASB issued revised accounting guidance for the presentation of net periodic costs related to benefit plans. Current GAAP permits the aggregation of all the components of net periodic costs on the Consolidated Statement of Operations and does not require the disclosure of the location of net periodic costs on the Consolidated Statement of Operations. Under the amended guidance, the service cost component of net periodic costs must be included within Operating Income within the same line as other compensation expenses. All other components of net periodic costs must be outside of Operating Income. In addition, the updated guidance permits only the service cost component of net periodic costs to be capitalized to Inventory or Property, Plant and Equipment. This represents a change from current GAAP, which permits all components of net periodic costs to be capitalized. These amendments should be applied retrospectively for the presentation of the various components of net periodic costs and prospectively for the change in eligible costs to be capitalized. The guidance allows for a practical expedient that permits a company to use amounts disclosed in prior-period financial statements as the estimation basis for applying the retrospective presentation requirements.
For Duke Energy, this guidance is effective for interim and annual periods beginning January 1, 2018. Duke Energy currently presents the total non-capitalized net periodic costs within Operation, maintenance and other on the Consolidated Statement of Operations. The adoption of this guidance will result in a retrospective change to reclassify the presentation of the non-service cost (benefit) components of net periodic costs to Other income and expenses. Duke Energy intends to utilize the practical expedient for retrospective presentation. The change in net periodic costs eligible for capitalization is applicable prospectively. Since Duke Energy’s service cost component is expected to be greater than the total net periodic costs, the change will result in increased capitalization of net periodic costs, higher Operation, maintenance and other and higher Other income and expenses. The resulting impact to Duke Energy is expected to be an immaterial increase in Net Income resulting from the limitation of eligible capitalization of net periodic costs to the service cost component, which is larger than the total net periodic costs.lessor.
2. ACQUISITIONS AND DISPOSITIONS
ACQUISITIONS
The Duke Energy Registrants consolidate assets and liabilities from acquisitions as of the purchase date and include earnings from acquisitions in consolidated earnings after the purchase date.
2016 Acquisition of Piedmont Natural Gas
On October 3, 2016, Duke Energy acquired all outstanding common stock of Piedmont for a total cash purchase price of $5.0 billion and assumed Piedmont's existing long-term debt, which had a fair value of approximately $2.0 billion at the time of the acquisition. The acquisition provides a foundation for Duke Energy to establish a broader, long-term strategic natural gas infrastructure platform to complement its existing natural gas pipeline investments and regulated natural gas business in the Midwest. In connection with the closing of the acquisition, Piedmont became a wholly owned subsidiary of Duke Energy.
Purchase Price Allocation

The purchase price allocation of the Piedmont acquisition is as follows:
(in millions) 
Current assets$497
Property, plant and equipment, net4,714
Goodwill3,353
Other long-term assets804
Total assets9,368
Current liabilities, including current maturities of long-term debt576
Long-term liabilities1,790
Long-term debt2,002
Total liabilities4,368
Total purchase price$5,000
The fair value of Piedmont's assets and liabilities was determined based on significant estimates and assumptions that are judgmental in nature, including the amount and timing of projected future cash flows, discount rates reflecting risk inherent in the future cash flows and market prices of long-term debt.
The majority of Piedmont’s operations are subject to the rate-setting authority of the NCUC, the PSCSC and the TPUC and are accounted for pursuant to accounting guidance for regulated operations. The rate-setting and cost recovery provisions currently in place for Piedmont’s regulated operations provide revenues derived from costs, including a return on investment of assets and liabilities included in rate base. Thus, the fair value of Piedmont's assets and liabilities subject to these rate-setting provisions approximates the pre-acquisition carrying values and does not reflect any net valuation adjustments.
The significant assets and liabilities for which valuation adjustments were reflected within the purchase price allocation include the acquired equity method investments and long-term debt. The difference between the fair value and the pre-merger carrying values of long-term debt for regulated operations was recorded as a regulatory asset.
The excess of the purchase price over the fair value of Piedmont's assets and liabilities on the acquisition date was recorded as goodwill. The goodwill reflects the value paid by Duke Energy primarily for establishing a broader, long-term strategic natural gas infrastructure growth platform, an improved risk profile and expected synergies resulting from the combined entities.

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PART II
FINANCIAL STATEMENTSACQUISITIONS AND DISPOSITIONS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Under Securities and Exchange Commission (SEC) regulations, Duke Energy elected not to apply push down accounting to the stand-alone Piedmont financial statements.
Accounting Charges Related to the Acquisition
Duke Energy incurred pretax non-recurring transaction and integration costs associated with the acquisition of $84 million, $103 million $439 million and $9$439 million for the years ended December 31, 2018, 2017 2016 and 2015,2016, respectively. Amounts recorded on the Consolidated Statements of Operations in 2018 and 2017 were primarily system integration costs of $78 million and $71 million, respectively, related to combining the various operational and financial systems of Duke Energy and Piedmont, including a one-time software impairment resulting from planned accounting system and process integration.integration in 2017. A $7 million charge was recorded within Impairment Charges, with the remaining $64 million recorded within Operation, maintenance and other.other in 2017.
Amounts recorded in 2016 include:
Interest expense of $234 million related to the acquisition financing, including realized losses on forward-starting interest rate swaps of $190 million. See Note 14 for additional information on the swaps.
Charges of $104 million related to commitments made in conjunction with the transaction, including charitable contributions and a one-time bill credit to Piedmont customers. $10 million was recorded as a reduction in Operating Revenues, with the remaining $94 million recorded within Operation, maintenance and other.
Other transaction and integration costs of $101 million recorded to Operation, maintenance and other, including professional fees and severance.severance charges.
The majority of transition and integration activities are expected to bewere completed by the end of 2018.
Pro Forma Financial Information
The following unaudited pro forma financial information reflects the combined results of operations of Duke Energy and Piedmont as if the merger had occurred as of January 1, 2015. The pro forma financial information does not include potential cost savings, intercompany revenues, Piedmont’s earnings from a certain equity method investment sold immediately prior to the merger or non-recurring transaction and integration costs incurred by Duke Energy and Piedmont. The after-tax non-recurring transaction and integration costs incurred by Duke Energy and Piedmont were $279 million and $19 million for the yearsyear ended December 31, 2016, and 2015, respectively.2016.
This information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved or the future consolidated results of operations of Duke Energy.
Years Ended December 31,Year Ended December 31,
(in millions)201620152016
Operating Revenues$23,504
$23,570
$23,504
Net Income Attributable to Duke Energy Corporation2,442
2,877
2,442
Piedmont's Earnings
Piedmont's revenues and net income included in Duke Energy's Consolidated Statements of Operations for the year ended December 31, 2016, were $367 million and $20 million, respectively. Piedmont's revenues and net income for the year ended December 31, 2016, include the impact of non-recurring transaction costs of $10 million and $46 million, respectively.
Acquisition Related Financings and Other Matters
Duke Energy financed the Piedmont acquisition with a combination of debt and equity issuances and other cash sources, including:
$3.75 billion of long-term debt issued in August 2016.
$750 million borrowed under the $1.5 billion short-term loan facility in September 2016, which was repaid in December 2016.
10.6 million shares of common stock issued in October 2016 for net cash proceeds of approximately $723 million.
The $4.9 billion senior unsecured bridge financing facility (Bridge Facility) with Barclays Capital, Inc. (Barclays) was terminated following the issuance of the long-term debt. For additional information related to the debt and equity issuances, see Notes 6 and 18, respectively. For additional information regarding Duke Energy's and Piedmont's joint investment in Atlantic Coast Pipeline, LLC (ACP), see Note 4.

139

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

DISPOSITIONS
For the yearyears ended December 31, 2018, and 2017, the LossIncome (Loss) from Discontinued Operations, net of tax, was immaterial. The following table summarizes the (Loss) IncomeLoss from Discontinued Operations, net of tax recorded on Duke Energy's Consolidated Statements of Operations for the yearsyear ended December 31, 2016, and 2015:2016:
 Years Ended December 31,
(in millions)2016
 2015
International Energy Disposal Group$(534) $157
Midwest Generation Disposal Group36
 33
Other(a)
90
 (13)
(Loss) Income from Discontinued Operations, net of tax$(408) $177
 Year Ended December 31,
(in millions)2016
International Disposal Group$(534)
Other(a)
126
Loss from Discontinued Operations, net of tax$(408)
(a)Relates to previously sold businesses not related to the Disposal Groups. The amount for 2016Amount represents an income tax benefit resulting from immaterial out of period deferred tax liability adjustments. The amountadjustments for 2015 includes indemnifications provided for certain legal, tax and environmental matters and foreign currency translation adjustments.previously sold businesses not related to the International Disposal Group.
2016 Sale of International Energy
In February 2016, Duke Energy announced it had initiated a process to divest its International Energy businesses, excluding the equity method investment in NMC (the International Disposal Group),Group, and in October 2016, announced it had entered into two separate purchase and sale agreements to execute the divestiture. Both sales closed in December of 2016, resulting in available cash proceeds of $1.9 billion, excluding transaction costs. Proceeds were primarily used to reduce Duke Energy holding company (the parent)the Parent debt. Existing favorable tax attributes result in no immediate U.S. federal-level cash tax impacts. Details of each transaction are as follows:



FINANCIAL STATEMENTSACQUISITIONS AND DISPOSITIONS


On December 20, 2016, Duke Energy closed on the sale of its ownership interests in businesses in Argentina, Chile, Ecuador, El Salvador, Guatemala and Peru to I Squared Capital. The assets sold included approximately 2,230 MW of hydroelectric and natural gas generation capacity, transmission infrastructure and natural gas processing facilities. I Squared Capital purchased the businesses for an enterprise value of $1.2 billion.
On December 29, 2016, Duke Energy closed on the sale of its Brazilian business, which included approximately 2,090 MW of hydroelectric generation capacity, to CTG for an enterprise value of $1.2 billion. With the closing of the CTG deal, Duke Energy finalized its exit from the Latin American market.
Assets Held For Sale and Discontinued Operations
As a result of the transactions, the International Disposal Group was classified as held for sale and as discontinued operations in the fourth quarter of 2016. Interest expense directly associated with the International Disposal Group was allocated to discontinued operations. No interest from corporate level debt was allocated to discontinued operations.
The following table presents the results of the International Disposal Group for the yearsyear ended December 31, 2016, and 2015, which are included in (Loss) IncomeLoss from Discontinued Operations, net of tax in Duke Energy's Consolidated Statements of Operations.
 Years Ended December 31,
(in millions)2016
 2015
Operating Revenues$988
 $1,088
Fuel used in electric generation and purchased power227
 306
Cost of natural gas43
 53
Operation, maintenance and other341
 334
Depreciation and amortization(a)
62
 92
Property and other taxes15
 7
Impairment charges (b)
194
 13
(Loss) Gains on Sales of Other Assets and Other, net(3) 6
Other Income and Expenses, net58
 23
Interest Expense82
 85
Pretax loss on disposal(c)
(514) 
(Loss) Income before income taxes(d)
(435)
227
Income tax expense(e)(f)
99
 70
(Loss) Income from discontinued operations of the International Disposal Group$(534)
$157

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PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Year Ended December 31,
(in millions)2016
Operating Revenues$988
Fuel used in electric generation and purchased power227
Cost of natural gas43
Operation, maintenance and other341
Depreciation and amortization(a)
62
Property and other taxes15
Impairment charges (b)
194
(Losses) Gains on Sales of Other Assets and Other, net(3)
Other Income and Expenses, net58
Interest Expense82
Pretax loss on disposal(c)
(514)
Loss before income taxes(d)
(435)
Income tax expense(e)(f)
99
Loss from discontinued operations of the International Disposal Group$(534)
(a)Upon meeting the criteria for assets held for sale, beginning in the fourth quarter of 2016 depreciation expense was ceased.
(b)In conjunction with the advancements of marketing efforts during 2016, Duke Energy performed recoverability tests of the long-lived asset groups of International Energy. As a result, Duke Energy determined the carrying value of certain assets in Central America was not fully recoverable and recorded a pretax impairment charge of $194 million. The charge represents the excess of carrying value over the estimated fair value of the assets, which was based on a Level 3 Fair Value measurement that was primarily determined from the income approach using discounted cash flows but also considered market information obtained in 2016.
(c)The pretax loss on disposal includes the recognition of cumulative foreign currency translation losses of $620 million as of the disposal date. See the Consolidated Statements of Changes in Equity for additional information.
(d)Pretax (Loss) IncomeLoss attributable to Duke Energy Corporation was $(445) million and $221 million for the yearsyear ended December 31, 2016 and 2015, respectively.2016.
(e)2016 amountAmount includes $126 million of income tax expense on the disposal, which primarily reflects in-country taxes incurred as a result of the sale. The after-tax loss on disposal was $640 million.
(f)2016 amountAmount includes an income tax benefit of $95 million. See Note 22,23, "Income Taxes," for additional information.
Duke Energy has elected not to separately disclose discontinued operations on the Consolidated Statements of Cash Flows. The following table summarizes Duke Energy's cash flows from discontinued operations related to the International Disposal Group.
Years Ended December 31,Year Ended December 31,
(in millions)2016
 2015
2016
Cash flows provided by (used in):    
Operating activities$204
 $248
$204
Investing activities(434) 177
(434)
Other Sale Related Matters
During 2017, Duke Energy provided certain transition services to CTG and I Squared Capital. Cash flows related to providing the transition services were not material as of December 31, 2017. All transition services related to the International Disposal Group ended in 2017. Additionally, Duke Energy will reimburse CTG and I Squared Capital for all tax obligations arising from the period preceding consummation on the transactions, totaling approximatelyand recorded a liability of $54 million and $78 million.million as of December 31, 2018, and 2017, respectively. Duke Energy has not recorded any other liabilities, contingent liabilities or indemnifications related to the International Disposal Group.
2015 Midwest Generation Exit

Duke Energy, through indirect subsidiaries, completed the sale of the Midwest Generation Disposal Group to a subsidiary of Dynegy on April 2, 2015, for approximately $2.8 billion in cash. The nonregulated Midwest generation business included generation facilities with approximately 5,900 MW of owned capacity located in Ohio, Pennsylvania and Illinois. On April 1, 2015, prior to the sale, Duke Energy Ohio distributed its indirect ownership interest in the nonregulated Midwest generation business to a subsidiary of Duke Energy Corporation.
Duke Energy utilized a revolving credit agreement (RCA) to support the operations of the nonregulated Midwest generation business. Duke Energy Ohio had a power purchase agreement with the Midwest Generation Disposal Group for a portion of its standard service offer (SSO) supply requirement. The agreement and the SSO expired in May 2015.
The results of operations of the Midwest Generation Disposal Group prior to the date of sale are classified as discontinued operations in the accompanying Consolidated Statements of Operations. Interest expense associated with the RCA was allocated to discontinued operations. No other interest expense related to corporate level debt was allocated to discontinued operations. Certain immaterial costs that were eliminated as a result of the sale remained in continuing operations. The following table summarizes the Midwest Generation Disposal Group activity recorded within discontinued operations.
 Duke Energy Duke Energy Ohio
 Years Ended December 31, Years Ended December 31,
(in millions)2016
 2015
 2016
 2015
Operating Revenues$
 $543
 $
 $412
Pretax Loss on disposal(a)

 (45) 
 (52)
        
Income (loss) before income taxes(b)
$
 $59
 $
 $44
Income tax (benefit) expense(c)
(36) 26
 (36) 21
Income (loss) from discontinued operations$36
 $33
 $36
 $23
(a)FINANCIAL STATEMENTSThe Loss on disposal includes impairments recorded to adjust the carrying amount of the assets to the estimated fair value of the business, based on the selling price to Dynegy less cost to sell.BUSINESS SEGMENTS
(b)2015 amounts include the impact of an $81 million charge for the settlement agreement reached in a lawsuit related to the Midwest Generation Disposal Group. Refer to Note 5 for further information about the lawsuit.
(c)2016 amounts result from immaterial out of period deferred tax liability adjustments.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

3. BUSINESS SEGMENTS
OperatingReportable segments are determined based on information used by the chief operating decision-maker in deciding how to allocate resources and evaluate the performance of the business. Duke Energy evaluates segment performance based on segment income. Segment income is defined as income from continuing operations net of income attributable to noncontrolling interests. Segment income, as discussed below, includes intercompany revenues and expenses that are eliminated on the Consolidated Financial Statements. Certain governance costs are allocated to each segment. In addition, direct interest expense and income taxes are included in segment income.
Products and services are sold between affiliate companies and reportable segments of Duke Energy at cost. Segment assets as presented in the tables that follow exclude all intercompany assets.
Duke Energy
Duke Energy's segment structure includes the following segments: Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables.
The Electric Utilities and Infrastructure segment includes Duke Energy's regulated electric utilities in the Carolinas, Florida and the Midwest. The regulated electric utilities conduct operations through the Subsidiary Registrants that are substantially all regulated and, accordingly, qualify for regulatory accounting treatment. Electric Utilities and Infrastructure also includes Duke Energy's commercial electric transmission infrastructure investments.
The Gas Utilities and Infrastructure segment includes Piedmont, Duke Energy's natural gas local distribution companies in Ohio and Kentucky, and Duke Energy's natural gas storage and midstream pipeline investments. Gas Utilities and Infrastructure's operations are substantially all regulated and, accordingly, qualify for regulatory accounting treatment.
The Commercial Renewables segment is primarily comprised of nonregulated utility scale wind and solar generation assets located throughout the U.S.
The remainder of Duke Energy’s operations is presented as Other, which is primarily comprised of corporate interest expense on holding company debt, unallocated corporate costs contributions to the Duke Energy Foundation and the operations of Duke Energy’s wholly owned captive insurance subsidiary, Bison Insurance Company Limited (Bison).company, Bison. Other also includes Duke Energy's interest in NMC. See Note 12 for additional information on the investment in NMC.
Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets.
Year Ended December 31, 2017Year Ended December 31, 2018
Electric
 Gas
   Total
      Electric
 Gas
   Total
      
Utilities and
 Utilities and
 Commercial
 Reportable
      Utilities and
 Utilities and
 Commercial
 Reportable
      
(in millions)Infrastructure
 Infrastructure
 Renewables
 Segments
 Other
 Eliminations
 Total
Infrastructure
 Infrastructure
 Renewables
 Segments
 Other
 Eliminations
 Total
Unaffiliated Revenues$21,300
 $1,743
 $460
 $23,503
 $62
 $
 $23,565
$22,242
 $1,783
 $477
 $24,502
 $19
 $
 $24,521
Intersegment Revenues31
 93
 
 124
 76
 (200) 
31
 98
 
 129
 70
 (199) 
Total Revenues$21,331
 $1,836
 $460
 $23,627
 $138
 $(200) $23,565
$22,273
 $1,881
 $477
 $24,631
 $89
 $(199) $24,521
Interest Expense$1,240
 $105
 $87
 $1,432
 $574
 $(20) $1,986
$1,288
 $106
 $88
 $1,482
 $657
 $(45) $2,094
Depreciation and amortization3,010
 231
 155
 3,396
 131
 
 3,527
3,523
 245
 155
 3,923
 152
 (1) 4,074
Equity in earnings (losses) of unconsolidated affiliates5
 62
 (5) 62
 57
 
 119
5
 27
 (1) 31
 52
 
 83
Income tax expense (benefit)(a)
1,355
 116
 (628) 843
 353
 
 1,196
799
 78
 (147) 730
 (282) 
 448
Segment income (loss)(d)(e)
3,210
 319
 441
 3,970
 (905) 
 3,065
3,058
 274
 9
 3,341
 (694) 
 2,647
Add back noncontrolling interest component  
   
   
   
   
   
 5
  
   
   
   
   
   
 (22)
Loss from discontinued operations, net of tax  
   
   
   
   
   
 (6)
Income from discontinued operations, net of tax  
   
   
   
   
   
 19
Net income  
   
   
   
   
   
 $3,064
  
   
   
   
   
   
 $2,644
Capital investments expenditures and acquisitions$7,024
 $907
 $92
 $8,023
 $175
 $
 $8,198
$8,086
 $1,133
 $193
 $9,412
 $256
 $
 $9,668
Segment assets119,423
 11,462
 4,156
 135,041
 2,685
 188
 137,914
125,364
 12,361
 4,204
 141,929
 3,275
 188
 145,392
(a)All segments include adjustments to the December 31, 2017 estimate of the income tax effects of the Tax Act. Electric Utilities and Infrastructure includes a $24 million expense, Gas Utilities and Infrastructure includes a $1 million expense, Commercial Renewables includes a $3 million benefit and Other includes a $2 million benefit. See Note 23 for additional information.
(b)Electric Utilities and Infrastructure includes after-tax regulatory and legislative impairment charges of $202 million related to rate case orders, settlements or other actions of regulators or legislative bodies and an after-tax impairment charge of $46 million related to the Citrus County CC at Duke Energy Florida. See Note 4 for additional information.
(c)Gas Utilities and Infrastructure includes an after-tax impairment charge of $42 million for the investment in Constitution. See Note 12 for additional information.
(d)Commercial Renewables includes an impairment charge of $91 million, net of $2 million Noncontrolling interests, related to goodwill. See Note 11 for additional information.



FINANCIAL STATEMENTSBUSINESS SEGMENTS


(e)Other includes $65 million of after-tax costs to achieve the Piedmont merger, $144 million of after-tax severance charges related to a companywide initiative and an $82 million after-tax loss on the sale of the retired Beckjord Generating Station described below. For additional information, see Note 2 for the Piedmont Merger and Note 20 for severance charges.
In February 2018, Duke Energy sold Beckjord, a nonregulated facility retired during 2014, and recorded a pretax loss of $106 million within (Losses) Gains on Sales of Other Assets and Other, net and $1 million within Operation, maintenance and other on Duke Energy's Consolidated Statements of Operations for the year ended December 31, 2018. The sale included the transfer of coal ash basins and other real property and indemnification from any and all potential future claims related to the property, whether arising under environmental laws or otherwise.
 Year Ended December 31, 2017
 Electric
 Gas
   Total
      
 Utilities and
 Utilities and
 Commercial
 Reportable
      
(in millions)Infrastructure
 Infrastructure
 Renewables
 Segments
 Other
 Eliminations
 Total
Unaffiliated Revenues$21,300

$1,743

$460
 $23,503
 $62
 $
 $23,565
Intersegment Revenues31

93


 124
 76
 (200) 
Total Revenues$21,331
 $1,836
 $460
 $23,627
 $138
 $(200) $23,565
Interest Expense$1,240

$105

$87
 $1,432
 $574
 $(20) $1,986
Depreciation and amortization3,010

231

155
 3,396
 131
 
 3,527
Equity in earnings (losses) of unconsolidated affiliates5

62

(5) 62
 57
 
 119
Income tax expense (benefit)(a)
1,355
 116
 (628) 843
 353
 
 1,196
Segment income (loss)(b)(c)(d)
3,210
 319
 441
 3,970
 (905) 
 3,065
Add back noncontrolling interest component  
   
   
   
   
   
 5
Loss from discontinued operations, net of tax  
   
   
   
   
   
 (6)
Net income  
   
   
   
   
   
 $3,064
Capital investments expenditures and acquisitions$7,024
 $907
 $92
 $8,023
 $175
 $
 $8,198
Segment assets119,423
 11,462
 4,156
 135,041
 2,685
 188
 137,914
(a)All segments include impacts of the Tax Cuts and Jobs Act (the Tax Act).Act. Electric Utilities and Infrastructure includes a $231 million benefit, Gas Utilities and Infrastructure includes a $26 million benefit, Commercial Renewables includes a $442 million benefit and Other includes charges of $597 million.
(b)Electric Utilities and Infrastructure includes after-tax regulatory settlement charges of $98 million. See Note 4 for additional information.
(c)Commercial Renewables includes after-tax impairment charges of $74 million related to certain wind projects and the Energy Management Solutions reporting unit. See Notes 10 and 11 for additional information.
(d)Other includes $64 million of after-tax costs to achieve the Piedmont merger. See Note 2 for additional information.
 Year Ended December 31, 2016
 Electric
 Gas
   Total
      
 Utilities and
 Utilities and
 Commercial
 Reportable
      
(in millions)Infrastructure
 Infrastructure
 Renewables
 Segments
 Other
 Eliminations
 Total
Unaffiliated Revenues$21,336
 $875
 $484
 $22,695
 $48
 $
 $22,743
Intersegment Revenues30
 26
 
 56
 69
 (125) 
Total Revenues$21,366
 $901
 $484
 $22,751
 $117
 $(125) $22,743
Interest Expense$1,136
 $46
 $53
 $1,235
 $693
 $(12) $1,916
Depreciation and amortization2,897
 115
 130
 3,142
 152
 
 3,294
Equity in earnings (losses) of unconsolidated affiliates(a)
5
 19
 (82) (58) 43
 
 (15)
Income tax expense (benefit)1,672
 90
 (160) 1,602
 (446) 
 1,156
Segment income (loss)(b)(c)
3,040
 152
 23
 3,215
 (645) 1
 2,571
Add back noncontrolling interest component  
   
   
   
   
   
 7
Loss from discontinued operations, net of tax(d)
  
   
   
   
   
   
 (408)
Net income  
   
   
   
   
   
 $2,170
Capital investments expenditures and acquisitions(e)
$6,649
 $5,519
 $857
 $13,025
 $190
 $
 $13,215
Segment assets114,993
 10,760
 4,377
 130,130
 2,443
 188
 132,761

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)


 Year Ended December 31, 2016
 Electric
 Gas
   Total
      
 Utilities and
 Utilities and
 Commercial
 Reportable
      
(in millions)Infrastructure
 Infrastructure
 Renewables
 Segments
 Other
 Eliminations
 Total
Unaffiliated Revenues$21,336
 $875
 $484
 $22,695
 $48
 $
 $22,743
Intersegment Revenues30
 26
 
 56
 69
 (125) 
Total Revenues$21,366
 $901
 $484
 $22,751
 $117
 $(125) $22,743
Interest Expense$1,136
 $46
 $53
 $1,235
 $693
 $(12) $1,916
Depreciation and amortization2,897
 115
 130
 3,142
 152
 
 3,294
Equity in earnings (losses) of unconsolidated affiliates(a)
5
 19
 (82) (58) 43
 
 (15)
Income tax expense (benefit)1,672
 90
 (160) 1,602
 (446) 
 1,156
Segment income (loss)(b)(c)
3,040
 152
 23
 3,215
 (645) 1
 2,571
Add back noncontrolling interest component  
   
   
   
   
   
 7
Loss from discontinued operations, net of tax(d)
  
   
   
   
   
   
 (408)
Net income  
   
   
   
   
   
 $2,170
Capital investments expenditures and acquisitions(e)
$6,649
 $5,519
 $857
 $13,025
 $190
 $
 $13,215
Segment assets114,993
 10,760
 4,377
 130,130
 2,443
 188
 132,761
FINANCIAL STATEMENTSBUSINESS SEGMENTS
(a)    Commercial Renewables includes a pretax impairment charge of $71 million. See Note 12 for additional information.

(a)Commercial Renewables includes a pretax impairment charge of $71 million. See Note 12 for additional information.
(b)Other includes $329 million of after-tax costs to achieve mergers. Refer toSee Note 2 for additional information on costs related to the Piedmont merger.
(c)Other includes after-tax charges of $57 million related to cost savings initiatives. Refer toSee Note 1920 for further information.
(d)Includes a loss on sale of the International Disposal Group. Refer to Note 2 for further information.
(e)Other includes $26 million of capital investmentsinvestment expenditures related to the International Disposal Group. Gas Utilities and Infrastructure includes the Piedmont acquisition of $5 billion. Refer toSee Note 2 for more information on the Piedmont acquisition.
 Year Ended December 31, 2015
 Electric
 Gas
   Total
      
 Utilities and
 Utilities and
 Commercial
 Reportable
      
(in millions)Infrastructure
 Infrastructure
 Renewables
 Segments
 Other
 Eliminations
 Total
Unaffiliated Revenues$21,489
 $536
 $286
 $22,311
 $60
 $
 $22,371
Intersegment Revenues32
 5
 
 37
 75
 (112) 
Total Revenues$21,521
 $541
 $286
 $22,348
 $135
 $(112) $22,371
Interest Expense$1,074
 $25
 $44
 $1,143
 $393
 $(9) $1,527
Depreciation and amortization2,735
 79
 104
 2,918
 135
 
 3,053
Equity in (losses) earnings of unconsolidated affiliates(2) 1
 (6) (7) 76
 
 69
Income tax expense (benefit)1,602
 44
 (128) 1,518
 (262) 
 1,256
Segment income (loss) (a)(b)(c)
2,819
 73
 52
 2,944
 (299) 
 2,645
Add back noncontrolling interest component  
   
   
   
   
   
 9
Income from discontinued operations, net of tax(d)
  
   
   
   
   
   
 177
Net income  
   
   
   
   
   
 $2,831
Capital investments expenditures and acquisitions(e)
$6,852
 $234
 $1,019
 $8,105
 $258
 $
 $8,363
Segment assets(f)
109,097
 2,637
 3,861
 115,595
 5,373
 188
 121,156
(a)Electric Utilities and Infrastructure includes an after-tax charge of $58 million related to the Edwardsport settlement. Refer to Note 4 for further information.
(b)Other includes $60 million of after-tax costs to achieve mergers.
(c)Other includes after-tax charges of $77 million related to cost savings initiatives. Refer to Note 19 for further information.
(d)Includes the impact of a settlement agreement reached in a lawsuit related to the Midwest Generation Disposal Group. Refer to Note 5 for further information related to the lawsuit and Note 2 for further information on discontinued operations.
(e)Other includes capital investment expenditures of $45 million related to the International Disposal Group.
(f)Other includes Assets Held for Sale balances related to the International Disposal Group. Refer to Note 2 for further information.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Geographical Information
For the years ended December 31, 2017, 2016 and 2015, allAll assets and revenues from continuing operations are within the U.S.
Major Customers
For the year ended December 31, 2017,2018, revenues from one customer of Duke Energy Progress are $521$633 million. Duke Energy Progress has one reportable segment, Electric Utilities and Infrastructure. No other subsidiary registrantSubsidiary Registrant has an individual customer representing more than 10 percent of its revenues.
Products and Services
The following table summarizes revenues of the reportable segments by type.
Retail
 Wholesale
 Retail
   Total
Retail
 Wholesale
 Retail
   Total
(in millions)Electric
 Electric
 Natural Gas
 Other
 Revenues
Electric
 Electric
 Natural Gas
 Other
 Revenues
2018        
Electric Utilities and Infrastructure$19,013
 $2,345
 $
 $915
 $22,273
Gas Utilities and Infrastructure
 
 1,817
 64
 1,881
Commercial Renewables
 375
 
 102
 477
Total Reportable Segments$19,013
 $2,720
 $1,817

$1,081
 $24,631
2017        
        
Electric Utilities and Infrastructure$18,177
 $2,104
 $
 $1,050
 $21,331
$18,177
 $2,104
 $
 $1,050
 $21,331
Gas Utilities and Infrastructure
 
 1,732
 104
 1,836

 
 1,732
 104
 1,836
Commercial Renewables
 375
 
 85
 460

 375
 
 85
 460
Total Reportable Segments$18,177
 $2,479
 $1,732

$1,239
 $23,627
$18,177
 $2,479
 $1,732

$1,239
 $23,627
2016        
        
Electric Utilities and Infrastructure$18,338
 $2,095
 $
 $933
 $21,366
$18,338
 $2,095
 $
 $933
 $21,366
Gas Utilities and Infrastructure
 
 871
 30
 901

 
 871
 30
 901
Commercial Renewables
 303
 
 181
 484

 303
 
 181
 484
Total Reportable Segments$18,338
 $2,398
 $871

$1,144
 $22,751
$18,338
 $2,398
 $871

$1,144
 $22,751
2015        
Electric Utilities and Infrastructure$18,695
 $2,014
 $
 $812
 $21,521
Gas Utilities and Infrastructure
 
 546
 (5) 541
Commercial Renewables
 245
 
 41
 286
Total Reportable Segments$18,695
 $2,259
 $546

$848
 $22,348
Duke Energy Ohio
Duke Energy Ohio has two reportable operating segments, Electric Utilities and Infrastructure and Gas Utilities and Infrastructure.
Electric Utilities and Infrastructure transmits and distributes electricity in portions of Ohio and generates, distributes and sells electricity in portions of Northern Kentucky. Gas Utilities and Infrastructure transports and sells natural gas in portions of Ohio and Northern Kentucky. It conductsBoth reportable segments conduct operations primarily through Duke Energy Ohio and its wholly owned subsidiary, Duke Energy Kentucky.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The remainder of Duke Energy Ohio's operations is presented as Other,Other. In December 2018, the PUCO approved an order which is primarily comprisedallows the recovery or credit of governance costs allocated by its parent, Duke Energy, and revenues and expenses related to Duke Energy Ohio's contractual arrangement to buy power from OVEC's (Ohio Valley Electric Corporation)OVEC power plants. Due to the change in regulatory treatment of these amounts, OVEC revenues and expenses are now reflected in the Electric Utilities and Infrastructure segment. Previously, OVEC revenues and expense were included in Other. These amounts are deemed immaterial for Duke Energy Ohio. Therefore, no prior period amounts were restated. See Note 134 for additional information on related party transactions. For the years ended December 31, 2017, 2016 and 2015, allPUCO order.



FINANCIAL STATEMENTSBUSINESS SEGMENTS


All Duke Energy Ohio assets and revenues from continuing operations are within the U.S.
  Year Ended December 31, 2017
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  
Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,373
 $508
 $1,881
 $42
 $
 $1,923
Interest expense  $62
 $28
 $90
 $1
 $
 $91
Depreciation and amortization  178
 83
 261
 $
 
 261
Income tax expense (benefit)  40
 39
 79
 $(20) 
 59
Segment income (loss)138
 85
 223
 $(30) 
 193
Loss from discontinued operations, net of tax          (1)
Net income

 

 

 

   $192
Capital expenditures  $491
 $195
 $686
 $
 $
 $686
Segment assets  5,066
 2,758
 7,824
 66
 (15) 7,875
  Year Ended December 31, 2018
 Electric
 Gas
 Total
    
 Utilities and
 Utilities and
 Reportable
    
(in millions)  
Infrastructure
 Infrastructure
 Segments
 Other
 Total
Total revenues$1,450
 $506
 $1,956
 $1
 $1,957
Interest expense  $67
 $24
 $91
 $1
 $92
Depreciation and amortization  183
 85
 268
 
 268
Income tax expense (benefit)  47
 24
 71
 (28) 43
Segment income (loss)/Net income(a)
186
 93
 279
 (103) 176
Capital expenditures  $655
 $172
 $827
 $
 $827
Segment assets  5,643
 2,874
 8,517
 38
 8,555
(a)    Other includes the loss on the sale of Beckjord, see discussion above.
 Year Ended December 31, 2017
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,373
 $508
 $1,881
 $42
 $
 $1,923
Interest expense  $62
 $28
 $90
 $1
 $
 $91
Depreciation and amortization  178
 83
 261
 
 
 261
Income tax expense (benefit)  40
 39
 79
 (20) 
 59
Segment income (loss)138
 85
 223
 (30) 
 193
Loss from discontinued operations, net of tax          (1)
Net income

 

 

 

   $192
Capital expenditures  $491
 $195
 $686
 $
 $
 $686
Segment assets  5,066
 2,758
 7,824
 66
 (15) 7,875
 Year Ended December 31, 2016
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,410
 $503
 $1,913
 $31
 $
 $1,944
Interest expense  $58
 $27
 $85
 $1
 $
 $86
Depreciation and amortization  151
 80
 231
 2
 
 233
Income tax expense (benefit)  55
 44
 99
 (21) 
 78
Segment income (loss)154
 77
 231
 (39) 
 192
Income from discontinued operations, net of tax          36
Net income

 

 

 

   $228
Capital expenditures  $322
 $154
 $476
 $
 $
 $476
Segment assets4,782
 2,696
 7,478
 62
 (12) 7,528
 Year Ended December 31, 2015
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,331
 $541
 $1,872
 $33
 $
 $1,905
Interest expense  $53
 $25
 $78
 $1
 $
 $79
Depreciation and amortization  147
 79
 226
 1
 
 227
Income tax expense (benefit)  59
 45
 104
 (23) 
 81
Segment income (loss)118
 73
 191
 (41) (1) 149
Income from discontinued operations, net of tax          23
Net income

 

 

 

   $172
Capital expenditures  $264
 $135
 $399
 $
 $
 $399
Segment assets4,534
 2,516
 7,050
 56
 (9) 7,097



FINANCIAL STATEMENTSREGULATORY MATTERS


4. REGULATORY MATTERS
REGULATORY ASSETS AND LIABILITIES
The Duke Energy Registrants record regulatory assets and liabilities that result from the ratemaking process. See Note 1 for further information.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.
Duke Energy Progress EnergyDuke Energy Progress Energy
December 31, December 31,December 31, December 31,
(in millions)2017
 2016
 2017
 2016
2018
 2017
 2018
 2017
Regulatory Assets              
AROs – coal ash$4,025
 $3,761
 $1,984
 $1,830
$4,255
 $4,025
 $2,061
 $1,984
AROs – nuclear and other852
 684
 655
 569
772
 852
 601
 655
Accrued pension and OPEB2,249
 2,387
 906
 882
2,654
 2,249
 1,074
 906
Retired generation facilities480
 534
 386
 422
445
 480
 367
 386
Debt fair value adjustment1,197
 1,313
 
 
1,099
 1,197
 
 
Net regulatory asset related to income taxes
 894
 
 231
Deferred asset – Lee COLA383
 
 
 
Storm cost deferrals531
 153
 526
 148
1,117
 531
 953
 526
Nuclear asset securitized balance, net1,142
 1,193
 1,142
 1,193
1,093
 1,142
 1,093
 1,142
Hedge costs deferrals234
 217
 94
 91
204
 234
 74
 94
Derivatives – natural gas supply contracts142
 187
 
 
141
 142
 
 
Demand side management (DSM)/Energy efficiency (EE)530
 407
 281
 278
449
 530
 256
 281
Grid modernization39
 65
 
 
31
 39
 
 
Vacation accrual213
 196
 42
 38
213
 213
 41
 42
Deferred fuel and purchased power507
 156
 349
 111
838
 507
 600
 349
Nuclear deferral119
 226
 35
 134
133
 119
 46
 35
Post-in-service carrying costs (PISCC) and deferred operating expenses366
 413
 38
 42
320
 366
 36
 38
Transmission expansion obligation46
 71
 
 
39
 46
 
 
Manufactured gas plant (MGP)91
 99
 
 
99
 91
 
 
Advanced metering infrastructure (AMI)362
 218
 150
 
367
 362
 127
 150
NCEMPA deferrals53
 51
 53
 51
50
 53
 50
 53
East Bend deferrals45
 32
 
 
47
 45
 
 
Deferred pipeline integrity costs54
 36
 
 
65
 54
 
 
Amounts due from customers64
 66
 
 
24
 64
 
 
Other538
 542
 110
 103
784
 538
 322
 110
Total regulatory assets13,879
 13,901

6,751

6,123
15,622
 13,879

7,701

6,751
Less: current portion1,437
 1,023
 741
 401
2,005
 1,437
 1,137
 741
Total noncurrent regulatory assets$12,442
 $12,878

$6,010

$5,722
$13,617
 $12,442

$6,564

$6,010
Regulatory Liabilities              
Costs of removal$5,968
 $5,613
 $2,537
 $2,198
$5,421
 $5,968
 $2,135
 $2,537
ARO – nuclear and other806
 461
 
 
AROs – nuclear and other538
 806
 
 
Net regulatory liability related to income taxes8,113
 
 2,802
 
8,058
 8,113
 2,710
 2,802
Amounts to be refunded to customers10
 45
 
 
34
 10
 
 
Storm reserve20
 83
 
 60

 20
 
 
Accrued pension and OPEB146
 174
 
 
301
 146
 149
 
Deferred fuel and purchased power47
 192
 1
 81
16
 47
 16
 1
Other622
 722
 179
 245
1,064
 622
 319
 179
Total regulatory liabilities15,732
 7,290
 5,519
 2,584
15,432
 15,732
 5,329
 5,519
Less: current portion402
 409
 213
 189
598
 402
 280
 213
Total noncurrent regulatory liabilities$15,330
 $6,881
 $5,306
 $2,395
$14,834
 $15,330
 $5,049
 $5,306
Descriptions of regulatory assets and liabilities summarized in the tables above and below follow. See tables below for recovery and amortization periods at the separate registrants.



FINANCIAL STATEMENTSREGULATORY MATTERS


AROs coal ash. Represents deferred depreciation and accretion related to the legal obligation to close ash basins. The costs are deferred until recovery treatment has been determined. See Notes 1 and 9 for additional information.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

AROs nuclear and other. Represents regulatory assets or liabilities, including deferred depreciation and accretion, related to legal obligations associated with the future retirement of property, plant and equipment, excluding amounts related to coal ash. The AROs relate primarily to decommissioning nuclear power facilities. The amounts also include certain deferred gains and losses on NDTF investments. See Notes 1 and 9 for additional information.
Accrued pension and OPEB. Accrued pension and other post-retirement benefit obligations (OPEB)OPEB represent regulatory assets and liabilities related to each of the Duke Energy Registrants’ respective shares of unrecognized actuarial gains and losses and unrecognized prior service cost and credit attributable to Duke Energy’s pension plans and OPEB plans. The regulatory asset or liability is amortized with the recognition of actuarial gains and losses and prior service cost and credit to net periodic benefit costs for pension and OPEB plans. The accrued pension and OPEB regulatory asset is expected to be recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.
Retired generation facilities. Represents amounts to be recovered for facilities that have been retired and are probable of recovery.
Debt fair value adjustment. Purchase accounting adjustments recorded to state the carrying value of Progress Energy and Piedmont at fair value in connection with the 2012 and 2016 mergers, respectively. Amount is amortized over the life of the related debt.
Net regulatory asset or liability related to income taxes. Amounts for all registrants include regulatory liabilities related primarily to impacts from the Tax Act. See Note 2223 for additional information. Amounts have no immediate impact on rate base as regulatory assets are offset by deferred tax liabilities.
Deferred asset – Lee COLA. Represents deferred costs incurred for the canceled Lee nuclear project.
Storm cost deferrals. Represents deferred incremental costs incurred related to extraordinary weather-related events.
Nuclear asset securitized balance, net. Represents the balance associated with Crystal River Unit 3 retirement approved for recovery by the FPSC on September 15, 2015, and the upfront financing costs securitized in 2016 with issuance of the associated bonds. The regulatory asset balance is net of the AFUDC equity portion.
Hedge costs and other deferrals. Amounts relate to unrealized gains and losses on derivatives recorded as a regulatory asset or liability, respectively, until the contracts are settled.
Derivatives – natural gas supply contracts. Represents costs for certain long-dated, fixed quantity forward gas supply contracts, which are recoverable through PGA clauses.
DSM/EE. Deferred costs related to various DSM and EE programs recoverable through various mechanisms.
Grid modernization. Amounts represent deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service.
Vacation accrual. GenerallyRepresents.vacation entitlement, which is generally recovered within onein the following year.
Deferred fuel and purchased power. Represents certain energy-related costs that are recoverable or refundable as approved by the applicable regulatory body.
Nuclear deferral. Includes amounts related to levelizing nuclear plant outage costs, which allows for the recognition of nuclear outage expenses over the refueling cycle rather than when the outage occurs, resulting in the deferral of operations and maintenance costs associated with refueling.
Post-in-service carrying costs and deferred operating expenses. Represents deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service.
Gasification services agreement buyout. The IURC authorized Duke Energy Indiana to recover costs incurred to buy out a gasification services agreement, including carrying costs through 2017.
Transmission expansion obligation. Represents transmission expansion obligations related to Duke Energy Ohio’s withdrawal from Midcontinent Independent System Operator, Inc. (MISO).
MGP. Represents remediation costs incurred at former MGP sites and the deferral of costs to be incurred at theDuke Energy Ohio's East End and West End sites through 2019.sites.
AMI. Represents deferred costs related to the installation of AMI meters and remaining net book value of non-AMI meters to be replaced at Duke Energy Carolinas, net book value of existing meters at Duke Energy Florida, Duke Energy Progress and Duke Energy Ohio and expected future recovery of net book value of electromechanical meters that have been replaced with AMI meters at Duke Energy Indiana.
NCEMPA deferrals. Represents retail allocated cost deferrals and returns associated with the additional ownership interest in assets acquired from NCEMPA in 2015.
East Bend deferrals. Represents both deferred operating expenses and deferred depreciation as well as carrying costs on the portion of East Bend Generating Station (East Bend) that was acquired from Dayton Power and Light and that had been previously operated as a jointly owned facility.
Deferred pipeline integrity costs. Represents pipeline integrity management costs in compliance with federal regulations recovered through a rider mechanism.



FINANCIAL STATEMENTSREGULATORY MATTERS


Amounts due from customers. Relates primarily to margin decoupling and IMR recovery mechanisms.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Costs of removal. Represents funds received from customers to cover the future removal of property, plant and equipment from retired or abandoned sites as property is retired. Also includes certain deferred gains on NDTF investments.
Amounts to be refunded to customers. Represents required rate reductions to retail customers by the applicable regulatory body.
Storm reserve. Amounts are used to offset future incurred costs for named storms as approved by regulatory commissions.
RESTRICTIONS ON THE ABILITY OF CERTAIN SUBSIDIARIES TO MAKE DIVIDENDS, ADVANCES AND LOANS TO DUKE ENERGY
As a condition to the approval of merger transactions, the NCUC, PSCSC, PUCO, KPSC and IURC imposed conditions on the ability of Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio, Duke Energy Kentucky, Duke Energy Indiana and Piedmont to transfer funds to Duke Energy through loans or advances, as well as restricted amounts available to pay dividends to Duke Energy. Certain subsidiaries may transfer funds to the parent by obtaining approval of the respective state regulatory commissions. These conditions imposed restrictions on the ability of the public utility subsidiaries to pay cash dividends as discussed below.
Duke Energy Progress and Duke Energy Florida also have restrictions imposed by their first mortgage bond indentures, which in certain circumstances, limit their ability to make cash dividends or distributions on common stock. Amounts restricted as a result of these provisions were not material at December 31, 2017.2018.
Additionally, certain other subsidiaries of Duke Energy have restrictions on their ability to dividend, loan or advance funds to Duke Energy due to specific legal or regulatory restrictions, including, but not limited to, minimum working capital and tangible net worth requirements.
The restrictions discussed below were less than 25 percentnot a material amount of Duke Energy's and Progress Energy's net assets at December 31, 2017.2018.
Duke Energy Carolinas
Duke Energy Carolinas must limit cumulative distributions subsequent to mergers to (i) the amount of retained earnings on the day prior to the closing of the mergers, plus (ii) any future earnings recorded.
Duke Energy Progress
Duke Energy Progress must limit cumulative distributions subsequent to the mergers between Duke Energy and Progress Energy and Duke Energy and Piedmont to (i) the amount of retained earnings on the day prior to the closing of the respective mergers, plus (ii) any future earnings recorded.
Duke Energy Ohio
Duke Energy Ohio will not declare and pay dividends out of capital or unearned surplus without the prior authorization of the PUCO. Duke Energy Ohio received FERC and PUCO approval to pay dividends from its equity accounts that are reflective of the amount that it would have in its retained earnings account had push-down accounting for the Cinergy Corp. (Cinergy) merger not been applied to Duke Energy Ohio’s balance sheet. The conditions include a commitment from Duke Energy Ohio that equity, adjusted to remove the impacts of push-down accounting, will not fall below 30 percent of total capital.
Duke Energy Kentucky is required to pay dividends solely out of retained earnings and to maintain a minimum of 35 percent equity in its capital structure.
Duke Energy Indiana
Duke Energy Indiana must limit cumulative distributions subsequent to the merger between Duke Energy and Cinergy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded. In addition, Duke Energy Indiana will not declare and pay dividends out of capital or unearned surplus without prior authorization of the IURC.
Piedmont
Piedmont must limit cumulative distributions subsequent to the acquisition of Piedmont by Duke Energy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded.
RATE RELATEDRATE-RELATED INFORMATION
The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

All Registrants
Tax Act Impacts
On December 22, 2017, President Trump signed the Tax Act into law, which, among other provisions, reduces the maximum federal corporate income tax rate from 35 percent to 21 percent, effective January 1, 2018. As a result of the Tax Act, the Subsidiary Registrants revalued their deferred tax assets and deferred tax liabilities, as of December 31, 2017, to account for the future impact of lower corporate tax rates on these deferred tax amounts. For the Subsidiary Registrants regulated operations, where the reduction is expected to be accounted for and applied to customers’ rates in future commission proceedings, including rate proceedings, the net remeasurement has been deferred as a regulatory liability. Each of the Subsidiary Registrant's regulatory commissions is reviewing the Tax Act to determine the potential impacts on customer rates. Beginning in January 2018, the Subsidiary Registrants will defer the estimated ongoing impacts of the Tax Act that are expected to be returned to customers. See Note 22 for additional information.
Duke Energy Carolinas and Duke Energy Progress
Ash Basin Closure Costs DeferralGrid Improvement – South Carolina
On December 30, 2016,June 22, 2018, Duke Energy Carolinas and Duke Energy Progress filed a joint petition with the NCUCPSCSC seeking an accounting order authorizing deferral of certain costs incurred in connection with federalgrid reliability, resiliency and state environmental remediation requirements related tomodernization work that is being performed under the permanent closure of ash basins and other ash storage units at coal-fired generating facilities that have provided or are providing generation to customers located in North Carolina. Initial comments were received in March 2017, and reply comments were filed on April 19, 2017. The NCUC has consolidatedcompanies’ grid improvement initiative. On October 3, 2018, the PSCSC granted Duke Energy Carolinas' and Duke Energy Progress’ coal ashProgress' joint petition, which authorizes the deferral requests into their respectiveof these costs until the rate effective dates of each Company’s next general rate case dockets for decision. See "2017case.



FINANCIAL STATEMENTSREGULATORY MATTERS


Hurricane Florence, Hurricane Michael and Winter Storm Diego
In September 2018, Hurricane Florence made landfall and inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina Rate Case" sections belowand South Carolina. Approximately 2 million customers were impacted. The companies incurred approximately $500 million in incremental operation and maintenance expenses ($70 million and $430 million for additional discussion.Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $90 million in capital costs ($5 million and $85 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the hurricane restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
In October 2018, the remnants of Hurricane Michael inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 1 million customers were impacted. The companies incurred approximately $100 million in incremental operation and maintenance expenses ($75 million and $25 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $21 million in capital costs ($12 million and $9 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the hurricane restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
In December 2018, Winter Storm Diego inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 800,000 customers were impacted. The companies incurred approximately $85 million in incremental operation and maintenance expenses ($60 million and $25 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $9 million in capital costs ($7 million and $2 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the winter storm restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
On December 21, 2018, Duke Energy Carolinas and Duke Energy Progress filed with the NCUC petitions for approval to defer the incremental costs incurred to a regulatory asset for recovery in the next base rate case. The NCUC issued an order requesting comments on the deferral positions. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of this matter. Duke Energy Progress filed a similar request with the PSCSC on January 11, 2019, which also included a request for the continuation of prior deferrals requested for ice storms and Hurricane Matthew, and on January 30, 2019, the PSCSC issued a directive approving the deferral request.
North Carolina State Corporate Income Tax
On December 12, 2018, Duke Energy Carolinas and Duke Energy Progress filed requests to reduce their rates effective January 1, 2019, based on a reduction in North Carolina’s corporate income tax rate from 3 to 2.5 percent, as enacted by the General Assembly in Session Law 2017-57, which became law on June 28, 2017, with an effective date of January 1, 2019. On December 17, 2018, the NCUC issued orders approving the Duke Energy Carolinas and Duke Energy Progress rate decrements.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Carolinas
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.
 December 31, Earns/PaysRecovery/Refund
(in millions)2017
2016
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs - coal ash$1,645
$1,536
 (i)(b)
AROs - nuclear and other
9
   
Accrued pension and OPEB410
481
  (j)
Retired generation facilities(c)
29
39
 X2023
Net regulatory asset related to income taxes(d)

484
   
Hedge costs deferrals(c)
109
93
 X2041
DSM/EE210
122
 (h)(h)
Vacation accrual83
76
 (e)2018
Deferred fuel and purchased power140

 (f)2018
Nuclear deferral84
92
  2019
PISCC(c)
35
70
 X(b)
AMI185
172
 X(b)
Other222
223
  (b)
Total regulatory assets3,152
3,397
   
Less: current portion299
238
   
Total noncurrent regulatory assets$2,853
$3,159
   
Regulatory Liabilities(a)
     
Costs of removal(c)
$2,054
$2,015
 X(g)
ARO - nuclear and other806
461
  (b)
Net regulatory liability related to income taxes(d)
3,028

  (b)
Storm reserve(c)
20
22
  (b)
Accrued pension and OPEB44
46
  (j)
Deferred fuel and purchased power46
105
 (f)2018
Other359
352
  (b)
Total regulatory liabilities6,357
3,001
   
Less: current portion126
161
   
Total noncurrent regulatory liabilities$6,231
$2,840
   

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash$1,725
$1,645
 (i)(b)
Accrued pension and OPEB581
410
  (j)
Retired generation facilities(c)
21
29
 X2023
Deferred Asset – Lee COLA383

  (b)
Storm cost deferrals160

 X(b)
Hedge costs deferrals(c)
101
109
 X2041
DSM/EE169
210
 (h)(h)
Vacation accrual78
83
 (e)2019
Deferred fuel and purchased power196
140
 (f)2020
Nuclear deferral87
84
  2020
PISCC(c)
34
35
 X(b)
AMI176
185
 X(b)
Other266
222
  (b)
Total regulatory assets3,977
3,152
   
Less: current portion520
299
   
Total noncurrent regulatory assets$3,457
$2,853
   
Regulatory Liabilities(a)
     
Costs of removal(c)
$1,968
$2,054
 X(g)
ARO – nuclear and other538
806
  (b)
Net regulatory liability related to income taxes(d)
3,082
3,028
  (b)
Storm reserve(c)

20
  (b)
Accrued pension and OPEB38
44
  (j)
Deferred fuel and purchased power
46
 (f)2020
Other572
359
  (b)
Total regulatory liabilities6,198
6,357
   
Less: current portion199
126
   
Total noncurrent regulatory liabilities$5,999
$6,231
   
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 22.23.
(e)Earns a return on outstanding balance in North Carolina.
(f)Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina.
(g)Recovered over the life of the associated assets.
(h)Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.
(i)Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers.customers as permitted by various regulatory orders.
(j)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.
2017 North Carolina Rate Case
On August 25, 2017, Duke Energy Carolinas filed an application with the NCUC for a rate increase for retail customers of approximately $647 million, which representsrepresented an approximate 13.6 percent increase in annual base revenues. The rate increase iswas driven by capital investments subsequent to the previous base rate case, including the W.S. Lee CC discussed below, grid improvement projects, AMI, investments in customer service technologies, costs of complying with coal combustion residuals (CCR)CCR regulations and the North Carolina Coal Ash Management Act of 2014 (Coal Ash Act) and recovery of costs related to licensing and development of the William States Lee III Nuclear Station (Lee Nuclear Station) discussed below.



FINANCIAL STATEMENTSREGULATORY MATTERS


On January 23,February 28, 2018, Duke Energy Carolinas and the North Carolina Public Staff (Public Staff) filed testimony recommending an overall rate decreaseAgreement and Stipulation of Partial Settlement resolving certain portions of the proceeding. Terms of the settlement included a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, Duke Energy Carolinas recorded a pretax charge of approximately $290 million.$4 million to Operation, maintenance and other on the Consolidated Statements of Operations.
On June 1, 2018, Duke Energy Carolinas and certain intervenors filed a Pilot Grid Rider Agreement and Stipulation (Grid Rider Stipulation) in which the parties agreed to the proposal Duke Energy Carolinas introduced in a post-hearing brief on April 27, 2018, along with additional commitments by Duke Energy Carolinas. Also on June 1, 2018, Duke Energy Carolinas and the Commercial Group filed a Partial Stipulation and Settlement Agreement to be considered in conjunction with the Stipulation.
Components of the Grid Rider Stipulation included:
Duke Energy Carolinas would recover grid improvement costs through a pilot, three-year Grid Rider except for costs related to targeted undergrounding of power lines, cable and conduit replacement, and power pole replacement;
Excluded costs were to be deferred with a return until Duke Energy Carolinas’ next base rate case proceeding; and
Costs incurred during the three-year pilot, both rider recoverable and deferred, were subject to a 4.5 percent cumulative cap of total annual electric service revenue.
On June 22, 2018, the NCUC issued an order approving the Stipulation of Partial Settlement and requiring a revenue reduction. The order also included the following material components not covered in the Stipulation:
Recovery of $554 million of deferred coal ash basin closure costs over a five-year period with a return at Duke Energy Carolinas' WACC;
Assessment of a $70 million management penalty ratably over a five-year period by reducing the annual recovery of the deferred coal ash costs;
Denial of Duke Energy Carolinas' request for recovery of future estimated ongoing annual coal ash costs of $201 million with approval to defer such costs with a return at Duke Energy Carolinas' WACC, to be considered for recovery in the next rate case;
Inclusion in rates of costs related to the W.S. Lee CC, two new solar facilities, and AMI deployment as requested;
Recovery of Lee Nuclear Station licensing and development cost of $347 million over a 12-year period, but denial of a return on the deferred balance of costs;
Reduction in revenue related to lower income tax expense resulting from the Tax Act, and a requirement to maintain all excess deferred income tax (EDIT) resulting from the Tax Act in a regulatory liability account pending flow back to customers as approved by the commission at the earlier of three years or Duke Energy Carolinas’ next general rate case proceeding; and
Denial of the proposed Grid Rider Stipulation related to grid improvement costs and denial of deferral accounting treatment of the costs at this time. Duke Energy Carolinas may petition for deferral of grid modernization costs outside of a general rate case proceeding if it can show financial hardship or a stipulation that includes greater consensus among intervening parties on costs being classified as grid modernization.
As a result of the Order, Duke Energy Carolinas recorded a pretax charge of approximately $150 million to Impairment charges and Operation, maintenance and other on the Consolidated Statements of Operations. The charge is primarily related to the denial of a return on the Lee Nuclear Project and for previously recognized return impacted by the coal ash management penalty described above. On July 27, 2018, NCUC approved Duke Energy Carolinas' compliance filing. As a result, revised customer rates were effective on August 1, 2018.
On July 20, 2018, the North Carolina Attorney General filed a Notice of Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction issued by the NCUC. The Attorney General contends the commission’s order should be reversed and remanded, as it is in excess of the commission’s statutory authority; affected by errors of law; unsupported by competent, material and substantial evidence in view of the entire record as submitted; and arbitrary or capricious. The Sierra Club, North Carolina Sustainable Energy Association, North Carolina Justice Center, North Carolina Housing Coalition, Natural Resource Defense Council and Southern Alliance for Clean Energy have also filed Notices of Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction. On August 8, 2018, the Public Staff filed a Notice of Cross Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction issued by the NCUC. The Public Staff contends the commission’s order should be reversed and remanded, as it is affected by errors of law, and is unsupported by substantial evidence with regard to the commission’s failure to consider substantial evidence of coal ash related environmental violations. On November 29, 2018, the North Carolina Attorney General's Office filed a motion with the North Carolina Supreme Court requesting the court consolidate the Duke Energy Carolinas and Duke Energy Progress appeals and enter an order adopting the parties’ proposed briefing schedule as set out in the filing. On November 29, 2018, the North Carolina Supreme Court adopted a schedule for briefing set forth in the motion to consolidate the Duke Energy Carolinas and Duke Energy Progress appeals. The Appellee response briefs are due July 29, 2019. Duke Energy Carolinas cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


2018 South Carolina Rate Case
On November 8, 2018, Duke Energy Carolinas filed an application with the PSCSC for a rate increase for retail customers of approximately $168 million, which represents an approximate 10.0 percent increase in retail revenues. The rate increase is driven by capital investments and environmental compliance progress made by Duke Energy Carolinas since its previous rate case, including the further implementation of Duke Energy Carolinas’ generation modernization program, which consists of retiring, replacing and upgrading generation plants, investments in customer service technologies and continued investments in base work to maintain its transmission and distribution systems. The request includes net tax benefits resulting from the Tax Act of $66 million to reflect the change in ongoing tax expense, primarily from the reduction in the federal income tax rate from 35 to 21 percent, and $46 million to return EDIT resulting from the federal tax rate change and deferred revenues since January 2018 related to the change and benefits of $17 million from a reduction in North Carolina state income taxes allocable to South Carolina.
Duke Energy Carolinas also requested approval of its proposed Grid Improvement Plan, adjustments to its Prepaid Advantage Program and a variety of accounting orders related to ongoing costs for environmental compliance, including recovery over a five-year period of $242 million of deferred coal ash related compliance costs, grid investments between rate changes, incremental depreciation expense, a result of new depreciation rates from the depreciation study approved in the 2017 North Carolina Rate Case above, and the balance of development costs associated with the cancellation of the Lee Nuclear Project. Finally, Duke Energy Carolinas sought approval to establish a reserve and accrual for end of life nuclear costs for nuclear fuel and materials and supplies. An evidentiary hearing is scheduled to begin on February 27, 2018,March 21, 2019, and a decision and revised customer rates are expected by mid-2018.mid-2019. Duke Energy Carolinas cannot predict the outcome of this matter.
FERC Formula Rate Matter
On July 31, 2017, Piedmont Municipal Power Agency (PMPA)PMPA filed a complaint with FERC against Duke Energy Carolinas alleging that Duke Energy Carolinas misapplied the formula rate under the purchase power agreement (PPA)PPA between the parties by including regulatory amortization in its rates amortization expense associated with regulatory assets and recorded in a certain account without FERC approval. Duke Energy Carolinas disagreed with PMPA as it believed it was properly applying its FERC filed rate. On February 15, 2018, FERC issued an order ruling in favor of PMPA and ordered Duke Energy Carolinas to refund to PMPA all amounts improperly collected under the PPA. ResolutionDuke Energy Carolinas has issued to PMPA and similarly situated wholesale customers refunds of approximately $25 million. FERC also set the matter for settlement and hearing. PMPA and other customers filed a protest to Duke Energy Carolinas' refund report claiming that the refunds are inadequate in that (1) Duke Energy Carolinas invoked the limitations periods in the contracts to limit the time period for which the refunds were paid and the customers disagree that this matter is not expectedlimitation applies, and (2) Duke Energy Carolinas refunded only amounts recovered through a certain account and the customers have asserted that the order applies to be material.
Lincoln County Combustion Turbine
all regulatory assets. On December 7, 2017, the NCUCJuly 3, 2018, FERC issued an order approving a Certificate of Public Convenience and Necessity (CPCN) foraccepting Duke Energy Carolinas' proposed 402-megawatt (MW) simple cycle, advanced combustion turbine natural gas-fueled electric generating unit at its existing Lincoln County site.refund report and ruling that these two claims are outside the scope of FERC's February order. The CPCN also includes construction of related transmissionsettlement agreements and natural gas pipeline interconnection facilities. Construction is scheduledrevised formula rates for all parties to begin in 2018 with an extended commissioning and validation period from 2020-2024 and an estimated commercial operation date in 2024. As a condition of the approval,proceeding were filed on December 28, 2018. Duke Energy Carolinas will not seek recoverycannot predict the outcome of costs associated with the project until it is placed into commercial operation.this matter.
Advanced Metering Infrastructure Deferral
On July 12, 2016, the PSCSC issued an accounting order for Duke Energy Carolinas to defer the financial effects of depreciation expense incurred for the installation of AMI meters, the carrying costs on the investment at its weighted average cost of capital (WACC) and the carrying costs on the deferred costs at its WACC not to exceed $45 million. The decision also allows Duke Energy Carolinas to continue to depreciate the non-AMI meters to be replaced. Current retail rates will not change as a result of the decision and the ability of interested parties to challenge the reasonableness of expenditures in subsequent proceedings is not limited.
William StatesW.S. Lee Combined Cycle FacilityCC
On April 9, 2014, the PSCSC granted Duke Energy Carolinas and North Carolina Electric Membership Corporation (NCEMC)NCEMC a Certificate of Environmental Compatibility and Public Convenience and Necessity (CECPCN)CECPCN for the construction and operation of a 750-MW750-megawatt (MW) combined-cycle natural gas-fired generating plant at Duke Energy Carolinas' existing William States Lee Generating Station in Anderson, South Carolina. Duke Energy Carolinas began construction in July 2015 and estimates a cost to build of $600 million for its share of the cost to build the facility was approximately $650 million, including allowance for funds used during construction (AFUDC).AFUDC. Approximately $600 million is being recovered through base rate or deferral filings in North Carolina and South Carolina. The remaining amount will be included in future rate filings. The project is expected to be commercially available in the first quarter ofcommenced commercial operation on April 5, 2018. NCEMC will ownowns approximately 13 percent of the project. On July 3, 2014, the South Carolina Coastal Conservation League (SCCL) and Southern Alliance for Clean Energy (SACE) jointly filed a Notice of Appeal with the Court of Appeals of South Carolina (S.C. Court of Appeals) seeking the court's review of the PSCSC's decision, claiming the PSCSC did not properly consider a request related to a proposed solar facility prior to granting approval of the CECPCN. The S.C. Court of Appeals affirmed the PSCSC's decision on February 10, 2016, and on March 24, 2016, denied a request for rehearing filed by SCCL and SACE. On April 21, 2016, SCCL and SACE petitioned the South Carolina Supreme Court for review of the S.C. Court of Appeals decision. On March 24, 2017, the South Carolina Supreme Court denied the request for review, thus concluding the matter.
Lee Nuclear Station
In December 2007, Duke Energy Carolinas applied to the NRC for combined operating licenses (COLs)COLs for two Westinghouse AP1000 reactors for the proposed William States Lee III Nuclear Station to be located at a site in Cherokee County, South Carolina. The NCUC and PSCSC concurred with the prudency of Duke Energy Carolinas incurring certain project development and preconstruction costs through several separately issued orders, although full cost recovery is not guaranteed. In December 2016, the NRC issued a COL for each reactor. Duke Energy Carolinas is not required to build the nuclear reactors as a result of the COLs being issued.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

On March 29, 2017, Westinghouse filed for voluntary Chapter 11 bankruptcy in the U.S. Bankruptcy Court for the Southern District of New York. As part of itsThe Duke Energy Carolinas 2017 North Carolina Rate Case filing discussed above Duke Energy Carolinas is seeking NCUC approvalincluded a request to cancel the development of the Lee Nuclear Station project, recover incurred licensing and development costs and maintain the license issued by the NRC as an option for potential future development. The cancellation request was due to the Westinghouse bankruptcy filing and other market activityactivity. The NCUC Order issued on June 22, 2018, approved the cancellation of the Lee Nuclear Project, allowed Duke Energy Carolinas to continue to maintain the COLs, provided for recovery of the North Carolina retail allocation of project development costs, including AFUDC accrued through December 31, 2017, over 12 years and disallowed any return on the unamortized balance during the 12-year recovery period.
Given the repeal of certain sections of the Base Load Review Act in South Carolina combined with the cancellation of the project, Duke Energy Carolinas determined that it was no longer probable it would be allowed a return on its share of project development costs attributable to South Carolina. As a result, Duke Energy Carolinas recorded a pretax impairment in the second quarter of 2018 of $29 million within Impairment charges on the Consolidated Statements of Operations and Comprehensive Income.
South Carolina Petition
On June 22, 2018, Duke Energy Carolinas filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred in connection with the addition of the W.S. Lee CC, the ongoing deployment of Duke Energy Carolinas new billing and Customer Information System and the addition of the Carolinas West Primary Distribution Control Center. This request totaling approximately $33 million was approved on July 25, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


Sale of Hydroelectric (Hydro) Plants
In May 2018, Duke Energy Carolinas entered an agreement for the sale of five hydro plants with a combined 18.7-MW generation capacity in the Western Carolinas region to Northbrook Energy. The completion of the transaction is subject to approval from FERC for the four FERC-licensed plants, as well as other state regulatory agencies and is requesting recoverycontingent upon regulatory approval from the NCUC and PSCSC to defer the total estimated loss on the sale of incurred licensingapproximately $40 million. On July 5, 2018, Duke Energy Carolinas filed with NCUC for approval of the sale of the five hydro plants to Northbrook, to transfer the CPCNs for the four North Carolina hydro plants and development costs.to establish a regulatory asset for the North Carolina retail portion of the difference between sales proceeds and net book value. On September 4, 2018, the Public Staff filed comments supporting the CPCN transfer with conditions. On September 18, 2018, Duke Energy Carolinas filed reply comments opposing the Public Staff’s proposed conditions. On November 29, 2018, the NCUC issued a procedural order and held an evidentiary hearing on this matter on February 5, 2019. On August 28, 2018, Duke Energy Carolinas filed with PSCSC its Application for Approval of Transfer and Sale of Hydroelectric Generation Facilities, Acceptance for Filing of a Power Purchase Agreement and an Accounting Order to Establish a Regulatory Asset. On September 10, 2018, the ORS provided a letter to the commission stating its position on the application and on September 18, 2018, Duke Energy Carolinas requested this matter be carried over to allow Duke Energy Carolinas time to discuss certain accounting issues with the ORS. On August 9, 2018, Duke Energy Carolinas and Northbrook filed a joint Application for Transfer of Licenses with the FERC. On December 27, 2018, the FERC issued its Order Approving Transfer of Licenses (“Order”) for the four FERC-licensed hydro plants. On January 18, 2019, Duke Energy Carolinas and Northbrook Carolina Hydro II, LLC requested a six-month extension of time to comply with the requirement of the Order that Northbrook submit to FERC certified copies of all instruments of conveyance and signed acceptance sheets within 60 days of the date of the Order, given that compliance by the deadline set in the Order is not possible because the conveyance of the projects is contingent on the receipt of state regulatory approvals, which are not anticipated to be issued by February 25, 2019.
If commission approvals are not received, Duke Energy Carolinas can cancel the sales agreement and retain the hydro facilities. If commission approvals are received, the closing is expected to occur during the second quarter of 2019. After closing, Duke Energy Carolinas will maintainpurchase all the license issuedcapacity and energy generated by these facilities at the NRC in December 2016 as an optionavoided cost for potential future development. As of December 31, 2017, Duke Energy Carolinas has incurred approximately $558 million of costs, including AFUDC, related to the project. These project costs are included in Net property, plant and equipment on Duke Energy Carolinas’ Consolidated Balance Sheets.five years through power purchase agreements. Duke Energy Carolinas cannot predict the outcome of this matter.
Duke Energy Progress
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.
December 31, Earns/PaysRecovery/RefundDecember 31, Earns/PaysRecovery/Refund
(in millions)2017
2016
 a ReturnPeriod Ends2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
    
AROs - coal ash$1,975
$1,822
 (i)(b)
AROs - nuclear and other359
275
 (c)
AROs – coal ash$2,051
$1,975
 (h)(b)
AROs – nuclear and other429
359
 (c)
Accrued pension and OPEB430
423
 (l)542
430
 (k)
Retired generation facilities170
165
 X2023148
170
 X(b)
Net regulatory asset related to income taxes
7
 (d)
Storm cost deferrals(e)
150
148
 X(b)
Storm cost deferrals(d)
571
150
 X(b)
Hedge costs deferrals64
66
 (b)54
64
 (b)
DSM/EE(f)
264
263
 (j)2018
DSM/EE(e)
235
264
 (i)
Vacation accrual42
38
 201841
42
 2019
Deferred fuel and purchased power130
24
 (g)2018397
130
 (f)2020
Nuclear deferral35
38
 201946
35
 2020
PISCC and deferred operating expenses38
42
 X205436
38
 X2054
AMI75

 (b)67
75
 (b)
NCEMPA deferrals53
51
 (h)204250
53
 (g)2042
Other74
69
 (b)147
74
 (b)
Total regulatory assets3,859
3,431
 4,814
3,859
 
Less: current portion352
188
 703
352
 
Total noncurrent regulatory assets$3,507
$3,243
 $4,111
$3,507
 
Regulatory Liabilities(a)
    
Costs of removal$2,122
$1,840
 X(k)$1,878
$2,122
 X(j)
Accrued pension and OPEB93

 (k)
Net regulatory liability related to income taxes(l)1,854

 (b)1,863
1,854
 (b)
Deferred fuel and purchased power1
64
 (g)2018
1
 (f)2020
Other161
200
 (b)299
161
 (b)
Total regulatory liabilities4,138
2,104
 4,133
4,138
 
Less: current portion139
158
 178
139
 
Total noncurrent regulatory liabilities$3,999
$1,946
 $3,955
$3,999
 



FINANCIAL STATEMENTSREGULATORY MATTERS


(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit.
(d)Recovery over the life of the associated assets. Includes regulatory liabilities related to the change in the North Carolina tax rate discussed in Note 22.
(e)South Carolina storm costs are included in rate base.
(f)(e)Included in rate base.
(g)(f)Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina.
(h)(g)South Carolina retail allocated costs are earning a return.
(i)(h)Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers.customers as permitted by various regulatory orders.
(i)Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.
(j)Includes incentives on DSM/EE investments.
(k)Recovered over the life of the associated assets.
(l)(k)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

(l)Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 23.
2017 North Carolina Rate Case
On June 1, 2017, Duke Energy Progress filed an application with the NCUC for a rate increase for retail customers of approximately $477 million, which represented an approximate 14.9 percent increase in annual base revenues. Subsequent to the filing, Duke Energy Progress adjusted the requested amount to $420 million, representing an approximate 13 percent increase. The rate increase is driven by capital investments subsequent to the previous base rate case, costs of complying with CCR regulations and the Coal Ash Act, costs relating to storm recovery, investments in customer service technologies and recovery of costs associated with renewable purchased power. On November 22, 2017, Duke Energy Progress and the North Carolina Public Staff filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding, pending NCUC approval. Terms of the settlement include a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, in 2017 Duke Energy Progress recorded pretax charges totaling approximately $25 million to Impairment charges and Operation, maintenance and other on the Consolidated Income Statements, principally related to disallowances from rate base of certain projects at the Mayo and Sutton plants. The settlement does not include agreement on portions of the rate case relating to recovery of deferred storm recovery costs and coal ash basin deferred costs, which will be decided by the NCUC separately. Taking into consideration the settled portions and Duke Energy Progress’ requested recovery of the non-settled portions, the requested rate increase is reduced to approximately $300 million. An evidentiary hearing ended December 7, 2017, and a decision and revised customer rates are expected in the first quarter of 2018. Duke Energy Progress cannot predict the outcome of this matter.
Storm Cost Deferral Filings
On December 16, 2016, Duke Energy Progress filed a petition with the NCUC requesting an accounting order to defer certain costs incurred in connection with response to Hurricane Matthew and other significant storms in 2016. The final estimate of incremental operation and maintenance and capital costs of $116 million was filed with the NCUC in September 2017. On March 15, 2017, the NCUC Public Staff filed comments supporting deferral of a portion of Duke Energy Progress’ requested amount. Duke Energy Progress filed reply comments on April 12, 2017. On July 10, 2017, the NCUC consolidated Duke Energy Progress' storm deferral request into the Duke Energy Progress rate case docket for decision. See "2017 North Carolina Rate Case" for additional discussion. As of December 31,
On November 22, 2017, Duke Energy Progress hasand the Public Staff filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding. Terms of the settlement included a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, in 2017 Duke Energy Progress recorded pretax charges totaling approximately $77$25 million to Impairment charges and Operation, maintenance and other on the Consolidated Statements of Operations, principally related to disallowances from rate base of certain projects at the Mayo and Sutton plants. On February 23, 2018, the NCUC issued an order approving the stipulation. The order also included the following material components not covered in Regulatory assetsthe stipulation:
Recovery of the remaining $234 million of deferred coal ash basin closure costs over a five-year period with a return at Duke Energy Progress' WACC, excluding $10 million of retail deferred coal ash basin costs related to ash hauling at Duke Energy Progress' Asheville Plant;
Assessment of a $30 million management penalty ratably over a five-year period by reducing the annual recovery of the deferred coal ash costs;
Denial of Duke Energy Progress' request for recovery of future estimated ongoing annual coal ash costs of $129 million with approval to defer such costs with a return at Duke Energy Progress' WACC, to be considered for recovery in the next rate case; and
Approval to recover $51 million of the approximately $80 million deferred storm costs over a five-year period with amortization beginning in October 2016. The order did not allow the deferral of the associated capital costs or a return on itsthe deferred balance during the deferral period.
The order also impacted certain amounts that were similarly recorded on Duke Energy Carolinas' Consolidated Balance Sheets. As a result of the order, Duke Energy Progress and Duke Energy Carolinas recorded pretax charges of $68 million and $14 million, respectively, in the first quarter of 2018 to Impairment charges, Operation, maintenance and other and Interest Expense on the Consolidated Statements of Operations. These charges primarily related to the coal ash basin disallowance and previously recognized return impacted by the coal ash management penalty and deferred storm cost adjustments. Revised customer rates became effective on March 16, 2018.
On May 15, 2018, the Public Staff filed a Notice of Cross Appeal to the North Carolina Supreme Court from the February 23, 2018, Order Accepting Stipulation, Deciding Contested Issues and Granting Partial Rate Increase issued by the NCUC. The Public Staff contend the commission’s order should be reversed and remanded, as it is affected by errors of law, and is unsupported by competent, material and substantial evidence in view of the entire record as submitted. The North Carolina Attorney General and Sierra Club have also filed Notices of Appeal to the North Carolina Supreme Court from the February 23, 2018, Order Accepting Stipulation, Deciding Contested Issues and Granting Partial Rate Increase. On November 29, 2018, the North Carolina Attorney General's Office filed a motion with the North Carolina Supreme Court requesting the court consolidate the Duke Energy Progress and Duke Energy Carolinas appeals and enter an order adopting the parties’ proposed briefing schedule as set out in the filing. On November 29, 2018, the North Carolina Supreme Court adopted a schedule for briefing set forth in the motion to consolidate the Duke Energy Progress and Duke Energy Carolinas appeals. The Appellee response briefs are due July 29, 2019. Duke Energy Progress cannot predict the outcome of this matter.
On December 16,



FINANCIAL STATEMENTSREGULATORY MATTERS


2016 Duke Energy Progress filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred related to repairs and restoration of service following Hurricane Matthew. The final estimate of incremental operation and maintenance and capital costs was approximately $74 million. In January 2017, the PSCSC approved the deferral request and issued an accounting order. As of December 31, 2017, Duke Energy Progress has approximately $73 million included in Regulatory assets on its Consolidated Balance Sheets.
South Carolina Rate Case
In December 2016, the PSCSC approved a rate case settlement agreement among the ORS, (Office of Regulatory Staff), intervenors and Duke Energy Progress. Terms of the settlement agreement included an approximate $56 million increase in revenues over a two-year period. An increase of approximately $38 million in revenues was effective January 1, 2017, and an additional increase of approximately $18.5$19 million in revenues was effective January 1, 2018. Duke Energy Progress amortized approximately $18.5$19 million from the cost of removal reserve in 2017. Other settlement terms included a rate of return on equity of 10.1 percent, recovery of coal ash costs incurred from January 1, 2015, through June 30, 2016, over a 15‑year period and ongoing deferral of allocated ash basin closure costs from July 1, 2016, until the next base rate case. The settlement also provides that Duke Energy Progress will not seek an increase in rates in South Carolina to occur prior to 2019, with limited exceptions.
2018 South Carolina Rate Case
On November 8, 2018, Duke Energy Progress filed an application with the PSCSC for a rate increase for retail customers of approximately $59 million, which represents an approximate 10.3 percent increase in annual base revenues. The rate increase is driven by capital investments and environmental compliance progress made by Duke Energy Progress since its previous rate case, including the further implementation of Duke Energy Progress’ generation modernization program, which consists of retiring, replacing and upgrading generation plants, investments in customer service technologies and continued investments in base work to maintain its transmission and distribution systems. The request includes net tax benefits of $15 million consisting of a $12 million increase due to the expiration of EDITs related to reductions in North Carolina state income taxes allocable to South Carolina and decreases resulting from the Tax Act of $17 million to reflect the change in ongoing tax expense, primarily the reduction in the federal income tax rate from 35 to 21 percent, and $10 million to return EDIT resulting from the federal tax rate change and deferred revenues since January 2018 related to the change.
Duke Energy Progress also requested approval of its proposed Grid Improvement Plan, approval of a Prepaid Advantage Program and a variety of accounting orders related to ongoing costs for environmental compliance, including recovery over a five-year period of $51 million of deferred coal ash related compliance costs, AMI deployment, grid investments between rate changes and regulatory asset treatment related to the retirement of a generating plant located in Asheville, North Carolina. Finally, Duke Energy Progress sought approval to establish a reserve and accrual for end of life nuclear costs for materials and supplies and nuclear fuel. An evidentiary hearing is scheduled to begin on April 11, 2019, and a decision and revised customer rates are expected by mid-2019. Duke Energy Progress cannot predict the outcome of this matter.
Western Carolinas Modernization Plan
On November 4, 2015, Duke Energy Progress announced a Western Carolinas Modernization Plan, which included retirement of the existing Asheville coal-fired plant, the construction of two 280MW combined-cycle natural gas plants having dual fueldual-fuel capability, with the option to build a third natural gas simple cycle unit in 2023 based upon the outcome of initiatives to reduce the region's power demand. The plan also included upgrades to existing transmission lines and substations, installation of solar generation and a pilot battery storage project. These investments will be made within the next seven years. Duke Energy Progress is also working with the local natural gas distribution company to upgrade an existing natural gas pipeline to serve the natural gas plant.
On March 28, 2016, the NCUC issued an order approving a CPCN for the new combined-cycle natural gas plants, but denying the CPCN for the contingent simple cycle unit without prejudice to Duke Energy Progress to refile for approval in the future. On March 28, 2017,2018, Duke Energy Progress filed an annual progress report for the construction of the combined-cycle plants with the NCUC, with an estimated cost of $893 million. Site preparation activities for the combined-cycle plants are underwaycomplete and construction of these plants began in 2017, with an expected in-service date in late 2019.
On October 8, 2018, Duke Energy Progress plansfiled an application with the NCUC for a CPCN to file for future approvals related toconstruct the Hot Springs Microgrid Solar and Battery Storage Facility. On November 30, 2018, the NCUC issued an order scheduling hearings, requiring filing of testimony, establishing discovery guidelines and requiring public notice. On February 7, 2019, Duke Energy Progress made a joint filing with the Public Staff, which accepted the Public Staff’s proposed solar generationconditions and pilot battery storage project.requested that the NCUC cancel the evidentiary hearing. Duke Energy Progress cannot predict the outcome of this matter.
The carrying value of the 376-MW Asheville coal-fired plant, including associated ash basin closure costs, of $327 million and $385 million and $492 million areis included in Generation facilities to be retired, net on Duke Energy Progress' Consolidated Balance Sheets as of December 31, 2018, and 2017, and 2016, respectively.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Duke Energy Progress' request for a regulatory asset at the time of retirement with amortization over a 10-year period was approved by the NCUC on February 23, 2018.
Shearon Harris Nuclear Plant Expansion
In 2006, Duke Energy Progress selected a site at Harris to evaluate for possible future nuclear expansion. On February 19, 2008, Duke Energy Progress filed its COL application with the NRC for two Westinghouse AP1000 reactors at Harris, which the NRC docketed for review. On May 2, 2013, Duke Energy Progress filed a letter with the NRC requesting the NRC to suspend its review activities associated with the COL at the Harris site. The NCUC and PSCSC approved deferral of retail costs. Total deferred costs wereare approximately $47$43 million as of December 31, 2017,2018, and are recorded in Regulatory assets on Duke Energy Progress’ Consolidated Balance Sheets. On November 17, 2016, the FERC approved Duke Energy Progress’ rate recovery request filing for the wholesale ratepayers’ share of the abandonment costs, including a debt onlydebt-only return to be recovered through revised formula rates and amortized over a 15-year period beginning May 1, 2014. As part of the settlement agreement for the 2017 North Carolina Rate Case discussed above, Duke Energy Progress will amortize the regulatory asset over an eight-year period. TheNCUC approved the settlement on February 23, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


South Carolina Petitions
On June 22, 2018, Duke Energy Progress filed a petition with the PSCSC seeking an accounting order authorizing Duke Energy Progress to adopt new depreciation rates, effective March 16, 2018, that reflect the results of Duke Energy Progress’ most recent depreciation study. Also on June 22, 2018, Duke Energy Progress filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred in connection with the deployment of AMI, the ongoing deployment of Duke Energy Progress' new billing and Customer Information System, new depreciation rates and costs incurred in connection with the return of certain excess deferred state income taxes from North Carolina. These requests totaling approximately $20 million were approved on July 25, 2018.
FERC Form 1 Reporting Matter
On October 18, 2017, Fayetteville Public Works Commission (FPWC) filed with FERC a complaint against Duke Energy Progress. In the complaint, FPWC alleges that Duke Energy Progress’ change in its method of reporting materials and supplies inventory on FERC Form 1 for 2015 constituted a change in accounting practice that Duke Energy Progress was not permitted to implement without first obtaining FERC approval. On April 23, 2018, FERC issued an order finding that Duke Energy Progress’ new reporting methodology was not proper and required Duke Energy Progress to revise its FERC Form 1s beginning in 2014 and to issue refunds to formula rate customers. Duke Energy Progress estimates that these refunds will total approximately $14 million. On May 23, 2018, Duke Energy Progress filed a request for rehearing alleging that FERC’s order is subjectincorrect. Duke Energy Progress revised its FERC Form 1 filings in June 2018. On August 31, 2018, Duke Energy Progress filed with FERC a refund report memorializing its payment of refunds to NCUC approval.FPWC. Duke Energy Progress cannot predict the outcome of this matter.
Tax Act
As ordered by the NCUC on October 5, 2018, Duke Energy Progress filed a proposal on October 25, 2018, to adjust rates to reflect the reduction in federal corporate income tax rate from 35 to 21 percent for taxable years beginning after December 31, 2017, as outlined in the Tax Act. Duke Energy Progress proposed that this rate decrement be effective for service rendered on and after December 1, 2018. On November 28, 2018, the NCUC approved the proposal to implement the change in the federal corporate income tax rate and effective December 1, 2018, Duke Energy Progress implemented the rate reduction. Also, as ordered by the NCUC on October 5, 2018, Duke Energy Progress shall continue to hold in a deferred regulatory liability account the difference between revenues billed under the prior federal corporate income tax rate and the federal corporate income tax rate resulting from the Tax Act for the period January 1, 2018 through November 30, 2018. The disposition of such regulatory liability may be considered in Duke Energy Progress' next general rate case proceeding or in three years, whichever is sooner. EDIT related to the corporate income tax rate reduction shall be held in a deferred tax regulatory liability account until they can be addressed for ratemaking purposes in the next general rate case proceeding or in three years, whichever is sooner.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Florida
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets.
December 31, Earns/PaysRecovery/RefundDecember 31, Earns/PaysRecovery/Refund
(in millions)2017
2016
 a ReturnPeriod Ends2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
    
AROs - coal ash(c)
$9
$8
 X(b)
AROs - nuclear and other(c)
296
294
 X(b)
AROs – coal ash(c)
$10
$9
 (b)
AROs – nuclear and other(c)
172
296
 (b)
Accrued pension and OPEB(c)
476
458
 X(h)532
476
 X(g)
Retired generation facilities(c)
216
257
 X(b)219
216
 X(b)
Net regulatory asset related to income taxes(c)

224
 X(d)
Storm cost deferrals(c)
376

 (f)2021
Storm cost deferrals(c)(h)
382
376
 (e)2021
Nuclear asset securitized balance, net1,142
1,193
 20361,093
1,142
 2036
Hedge costs deferrals30
25
 201820
30
 2020
DSM/EE(c)
17
15
 X201821
17
 X2023
Deferred fuel and purchased power(c)
219
87
 (g)2019203
219
 (f)2020
Nuclear deferral
96
 
AMI(c)
75

 X203260
75
 X2032
Other36
36
 (b)176
36
 (d)(b)
Total regulatory assets2,892
2,693
 2,888
2,892
 
Less: current portion389
213
 434
389
 
Total noncurrent regulatory assets$2,503
$2,480
 $2,454
$2,503
 
Regulatory Liabilities(a)
    
Costs of removal(c)
$415
$358
 (e)(b)$257
$415
 (d)(b)
Net regulatory liability related to income taxes(c)
948

 (b)847
948
 (b)
Storm reserve(c)

60
 
Accrued pension and OPEB56

 X(g)
Deferred fuel and purchased power(c)

17
 (g) 16

 (f)2020
Other18
44
 (b)20
18
 (d)(b)
Total regulatory liabilities1,381
479
 1,196
1,381
 
Less: current portion74
31
 102
74
 
Total noncurrent regulatory liabilities$1,307
$448
 $1,094
$1,307
 
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Recovery over the life of the associated assets.
(e)Certain costs earn a return.
(f)(e)Earns a debt return/interest once collections begin.
(g)(f)Earns commercial paper rate.
(h)(g)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

(h)Balance includes $165 million for Hurricane Michael. Duke Energy Florida expects to seek recovery of these costs in the first half of 2019.
Storm Restoration Cost Recovery
In September 2017, Duke Energy Florida’sOhio
Duke Energy Ohio has two reportable segments, Electric Utilities and Infrastructure and Gas Utilities and Infrastructure.
Electric Utilities and Infrastructure transmits and distributes electricity in portions of Ohio and generates, distributes and sells electricity in portions of Northern Kentucky. Gas Utilities and Infrastructure transports and sells natural gas in portions of Ohio and Northern Kentucky. Both reportable segments conduct operations primarily through Duke Energy Ohio and its wholly owned subsidiary, Duke Energy Kentucky.
The remainder of Duke Energy Ohio's operations is presented as Other. In December 2018, the PUCO approved an order which allows the recovery or credit of revenues and expenses related to Duke Energy Ohio's contractual arrangement to buy power from OVEC power plants. Due to the change in regulatory treatment of these amounts, OVEC revenues and expenses are now reflected in the Electric Utilities and Infrastructure segment. Previously, OVEC revenues and expense were included in Other. These amounts are deemed immaterial for Duke Energy Ohio. Therefore, no prior period amounts were restated. See Note 4 for additional information on the PUCO order.



FINANCIAL STATEMENTSBUSINESS SEGMENTS


All Duke Energy Ohio assets and revenues from continuing operations are within the U.S.
  Year Ended December 31, 2018
 Electric
 Gas
 Total
    
 Utilities and
 Utilities and
 Reportable
    
(in millions)  
Infrastructure
 Infrastructure
 Segments
 Other
 Total
Total revenues$1,450
 $506
 $1,956
 $1
 $1,957
Interest expense  $67
 $24
 $91
 $1
 $92
Depreciation and amortization  183
 85
 268
 
 268
Income tax expense (benefit)  47
 24
 71
 (28) 43
Segment income (loss)/Net income(a)
186
 93
 279
 (103) 176
Capital expenditures  $655
 $172
 $827
 $
 $827
Segment assets  5,643
 2,874
 8,517
 38
 8,555
(a)    Other includes the loss on the sale of Beckjord, see discussion above.
 Year Ended December 31, 2017
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,373
 $508
 $1,881
 $42
 $
 $1,923
Interest expense  $62
 $28
 $90
 $1
 $
 $91
Depreciation and amortization  178
 83
 261
 
 
 261
Income tax expense (benefit)  40
 39
 79
 (20) 
 59
Segment income (loss)138
 85
 223
 (30) 
 193
Loss from discontinued operations, net of tax          (1)
Net income

 

 

 

   $192
Capital expenditures  $491
 $195
 $686
 $
 $
 $686
Segment assets  5,066
 2,758
 7,824
 66
 (15) 7,875
 Year Ended December 31, 2016
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,410
 $503
 $1,913
 $31
 $
 $1,944
Interest expense  $58
 $27
 $85
 $1
 $
 $86
Depreciation and amortization  151
 80
 231
 2
 
 233
Income tax expense (benefit)  55
 44
 99
 (21) 
 78
Segment income (loss)154
 77
 231
 (39) 
 192
Income from discontinued operations, net of tax          36
Net income

 

 

 

   $228
Capital expenditures  $322
 $154
 $476
 $
 $
 $476
Segment assets4,782
 2,696
 7,478
 62
 (12) 7,528



FINANCIAL STATEMENTSREGULATORY MATTERS


4. REGULATORY MATTERS
REGULATORY ASSETS AND LIABILITIES
The Duke Energy Registrants record regulatory assets and liabilities that result from the ratemaking process. See Note 1 for further information.
The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.
 Duke Energy Progress Energy
 December 31, December 31,
(in millions)2018
 2017
 2018
 2017
Regulatory Assets       
AROs – coal ash$4,255
 $4,025
 $2,061
 $1,984
AROs – nuclear and other772
 852
 601
 655
Accrued pension and OPEB2,654
 2,249
 1,074
 906
Retired generation facilities445
 480
 367
 386
Debt fair value adjustment1,099
 1,197
 
 
Deferred asset – Lee COLA383
 
 
 
Storm cost deferrals1,117
 531
 953
 526
Nuclear asset securitized balance, net1,093
 1,142
 1,093
 1,142
Hedge costs deferrals204
 234
 74
 94
Derivatives – natural gas supply contracts141
 142
 
 
Demand side management (DSM)/Energy efficiency (EE)449
 530
 256
 281
Grid modernization31
 39
 
 
Vacation accrual213
 213
 41
 42
Deferred fuel and purchased power838
 507
 600
 349
Nuclear deferral133
 119
 46
 35
Post-in-service carrying costs (PISCC) and deferred operating expenses320
 366
 36
 38
Transmission expansion obligation39
 46
 
 
Manufactured gas plant (MGP)99
 91
 
 
Advanced metering infrastructure (AMI)367
 362
 127
 150
NCEMPA deferrals50
 53
 50
 53
East Bend deferrals47
 45
 
 
Deferred pipeline integrity costs65
 54
 
 
Amounts due from customers24
 64
 
 
Other784
 538
 322
 110
Total regulatory assets15,622
 13,879

7,701

6,751
Less: current portion2,005
 1,437
 1,137
 741
Total noncurrent regulatory assets$13,617
 $12,442

$6,564

$6,010
Regulatory Liabilities       
Costs of removal$5,421
 $5,968
 $2,135
 $2,537
AROs – nuclear and other538
 806
 
 
Net regulatory liability related to income taxes8,058
 8,113
 2,710
 2,802
Amounts to be refunded to customers34
 10
 
 
Storm reserve
 20
 
 
Accrued pension and OPEB301
 146
 149
 
Deferred fuel and purchased power16
 47
 16
 1
Other1,064
 622
 319
 179
Total regulatory liabilities15,432
 15,732
 5,329
 5,519
Less: current portion598
 402
 280
 213
Total noncurrent regulatory liabilities$14,834
 $15,330
 $5,049
 $5,306
Descriptions of regulatory assets and liabilities summarized in the tables above and below follow. See tables below for recovery and amortization periods at the separate registrants.



FINANCIAL STATEMENTSREGULATORY MATTERS


AROs coal ash. Represents deferred depreciation and accretion related to the legal obligation to close ash basins. The costs are deferred until recovery treatment has been determined. See Notes 1 and 9 for additional information.
AROs nuclear and other. Represents regulatory assets or liabilities, including deferred depreciation and accretion, related to legal obligations associated with the future retirement of property, plant and equipment, excluding amounts related to coal ash. The AROs relate primarily to decommissioning nuclear power facilities. The amounts also include certain deferred gains and losses on NDTF investments. See Notes 1 and 9 for additional information.
Accrued pension and OPEB. Accrued pension and OPEB represent regulatory assets and liabilities related to each of the Duke Energy Registrants’ respective shares of unrecognized actuarial gains and losses and unrecognized prior service territory suffered significant damagecost and credit attributable to Duke Energy’s pension plans and OPEB plans. The regulatory asset or liability is amortized with the recognition of actuarial gains and losses and prior service cost and credit to net periodic benefit costs for pension and OPEB plans. The accrued pension and OPEB regulatory asset is expected to be recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
Retired generation facilities. Represents amounts to be recovered for facilities that have been retired and are probable of recovery.
Debt fair value adjustment. Purchase accounting adjustments recorded to state the carrying value of Progress Energy and Piedmont at fair value in connection with the 2012 and 2016 mergers, respectively. Amount is amortized over the life of the related debt.
Net regulatory asset or liability related to income taxes. Amounts for all registrants include regulatory liabilities related primarily to impacts from Hurricane Irma,the Tax Act. See Note 23 for additional information. Amounts have no immediate impact on rate base as regulatory assets are offset by deferred tax liabilities.
Deferred asset – Lee COLA. Represents deferred costs incurred for the canceled Lee nuclear project.
Storm cost deferrals. Represents deferred incremental costs incurred related to extraordinary weather-related events.
Nuclear asset securitized balance, net.Represents the balance associated with Crystal River Unit 3 retirement approved for recovery by the FPSC on September 15, 2015, and the upfront financing costs securitized in 2016 with issuance of the associated bonds. The regulatory asset balance is net of the AFUDC equity portion.
Hedge costs and other deferrals. Amounts relate to unrealized gains and losses on derivatives recorded as a regulatory asset or liability, respectively, until the contracts are settled.
Derivatives – natural gas supply contracts. Represents costs for certain long-dated, fixed quantity forward gas supply contracts, which are recoverable through PGA clauses.
DSM/EE. Deferred costs related to various DSM and EE programs recoverable through various mechanisms.
Grid modernization. Amounts represent deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service.
Vacation accrual. Represents.vacation entitlement, which is generally recovered in the following year.
Deferred fuel and purchased power. Represents certain energy-related costs that are recoverable or refundable as approved by the applicable regulatory body.
Nuclear deferral. Includes amounts related to levelizing nuclear plant outage costs, which allows for the recognition of nuclear outage expenses over the refueling cycle rather than when the outage occurs, resulting in approximately 1.3 millionthe deferral of operations and maintenance costs associated with refueling.
Post-in-service carrying costs and deferred operating expenses. Represents deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service.
Transmission expansion obligation. Represents transmission expansion obligations related to Duke Energy Ohio’s withdrawal from Midcontinent Independent System Operator, Inc. (MISO).
MGP. Represents remediation costs incurred at former MGP sites and the deferral of costs to be incurred at Duke Energy Ohio's East End and West End sites.
AMI. Represents deferred costs related to the installation of AMI meters and remaining net book value of non-AMI meters to be replaced at Duke Energy Carolinas, net book value of existing meters at Duke Energy Florida, Duke Energy Progress and Duke Energy Ohio and expected future recovery of net book value of electromechanical meters that have been replaced with AMI meters at Duke Energy Indiana.
NCEMPA deferrals. Represents retail allocated cost deferrals and returns associated with the additional ownership interest in assets acquired from NCEMPA in 2015.
East Bend deferrals. Represents both deferred operating expenses and deferred depreciation as well as carrying costs on the portion of East Bend that was acquired from Dayton Power and Light and that had been previously operated as a jointly owned facility.
Deferred pipeline integrity costs. Represents pipeline integrity management costs in compliance with federal regulations recovered through a rider mechanism.



FINANCIAL STATEMENTSREGULATORY MATTERS


Amounts due from customers. Relates primarily to margin decoupling and IMR recovery mechanisms.
Costs of removal. Represents funds received from customers experiencing outages. Into cover the fourth quarterfuture removal of 2017,property, plant and equipment from retired or abandoned sites as property is retired. Also includes certain deferred gains on NDTF investments.
Amounts to be refunded to customers. Represents required rate reductions to retail customers by the applicable regulatory body.
Storm reserve. Amounts are used to offset future incurred costs for named storms as approved by regulatory commissions.
RESTRICTIONS ON THE ABILITY OF CERTAIN SUBSIDIARIES TO MAKE DIVIDENDS, ADVANCES AND LOANS TO DUKE ENERGY
As a condition to the approval of merger transactions, the NCUC, PSCSC, PUCO, KPSC and IURC imposed conditions on the ability of Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio, Duke Energy Kentucky, Duke Energy Indiana and Piedmont to transfer funds to Duke Energy through loans or advances, as well as restricted amounts available to pay dividends to Duke Energy. Certain subsidiaries may transfer funds to the parent by obtaining approval of the respective state regulatory commissions. These conditions imposed restrictions on the ability of the public utility subsidiaries to pay cash dividends as discussed below.
Duke Energy Progress and Duke Energy Florida also incurred preparation costs relatedhave restrictions imposed by their first mortgage bond indentures, which in certain circumstances, limit their ability to Hurricane Nate. Onmake cash dividends or distributions on common stock. Amounts restricted as a result of these provisions were not material at December 28, 2017,31, 2018.
Additionally, certain other subsidiaries of Duke Energy Floridahave restrictions on their ability to dividend, loan or advance funds to Duke Energy due to specific legal or regulatory restrictions, including, but not limited to, minimum working capital and tangible net worth requirements.
The restrictions discussed below were not a material amount of Duke Energy's and Progress Energy's net assets at December 31, 2018.
Duke Energy Carolinas
Duke Energy Carolinas must limit cumulative distributions subsequent to mergers to (i) the amount of retained earnings on the day prior to the closing of the mergers, plus (ii) any future earnings recorded.
Duke Energy Progress
Duke Energy Progress must limit cumulative distributions subsequent to the mergers between Duke Energy and Progress Energy and Duke Energy and Piedmont to (i) the amount of retained earnings on the day prior to the closing of the respective mergers, plus (ii) any future earnings recorded.
Duke Energy Ohio
Duke Energy Ohio will not declare and pay dividends out of capital or unearned surplus without the prior authorization of the PUCO. Duke Energy Ohio received FERC and PUCO approval to pay dividends from its equity accounts that are reflective of the amount that it would have in its retained earnings account had push-down accounting for the Cinergy merger not been applied to Duke Energy Ohio’s balance sheet. The conditions include a commitment from Duke Energy Ohio that equity, adjusted to remove the impacts of push-down accounting, will not fall below 30 percent of total capital.
Duke Energy Kentucky is required to pay dividends solely out of retained earnings and to maintain a minimum of 35 percent equity in its capital structure.
Duke Energy Indiana
Duke Energy Indiana must limit cumulative distributions subsequent to the merger between Duke Energy and Cinergy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded. In addition, Duke Energy Indiana will not declare and pay dividends out of capital or unearned surplus without prior authorization of the IURC.
Piedmont
Piedmont must limit cumulative distributions subsequent to the acquisition of Piedmont by Duke Energy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded.
RATE-RELATED INFORMATION
The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects.
Duke Energy Carolinas and Duke Energy Progress
Grid Improvement – South Carolina
On June 22, 2018, Duke Energy Carolinas and Duke Energy Progress filed a joint petition with the FPSC to recover incremental storm restorationPSCSC seeking an accounting order authorizing deferral of certain costs for Hurricanes Irmaincurred in connection with grid reliability, resiliency and Nate and to replenishmodernization work that is being performed under the storm reserve. The estimated recovery amount is approximately $513 million to be recovered over a three-year period beginning in Marchcompanies’ grid improvement initiative. On October 3, 2018, subject to true up, which includes reestablishment of a $132 million storm reserve. At December 31, 2017,the PSCSC granted Duke Energy Florida'sCarolinas' and Duke Energy Progress' joint petition, which authorizes the deferral of these costs until the rate effective dates of each Company’s next general rate case.



FINANCIAL STATEMENTSREGULATORY MATTERS


Hurricane Florence, Hurricane Michael and Winter Storm Diego
In September 2018, Hurricane Florence made landfall and inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 2 million customers were impacted. The companies incurred approximately $500 million in incremental operation and maintenance expenses ($70 million and $430 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $90 million in capital costs ($5 million and $85 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets included approximately $376 millionas of recoverable costs underDecember 31, 2018, resulting from the FPSC's storm rulehurricane restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
In October 2018, the remnants of Hurricane Michael inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 1 million customers were impacted. The companies incurred approximately $100 million in incremental operation and maintenance expenses ($75 million and $25 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $21 million in capital costs ($12 million and $9 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the hurricane restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
In December 2018, Winter Storm Diego inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 800,000 customers were impacted. The companies incurred approximately $85 million in incremental operation and maintenance expenses ($60 million and $25 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $9 million in capital costs ($7 million and $2 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the winter storm restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
On December 21, 2018, Duke Energy Carolinas and Duke Energy Progress filed with the NCUC petitions for approval to defer the incremental costs incurred to a regulatory asset for recovery in the next base rate case. The NCUC issued an order requesting comments on the deferral positions. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of this matter. Duke Energy Progress filed a similar request with the PSCSC on January 11, 2019, which also included a request for the continuation of prior deferrals requested for ice storms and Hurricane Matthew, and on January 30, 2019, the PSCSC issued a directive approving the deferral request.
North Carolina State Corporate Income Tax
On December 12, 2018, Duke Energy Carolinas and Duke Energy Progress filed requests to reduce their rates effective January 1, 2019, based on a reduction in North Carolina’s corporate income tax rate from 3 to 2.5 percent, as enacted by the General Assembly in Session Law 2017-57, which became law on June 28, 2017, with an effective date of January 1, 2019. On December 17, 2018, the NCUC issued orders approving the Duke Energy Carolinas and Duke Energy Progress rate decrements.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Carolinas
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.
 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash$1,725
$1,645
 (i)(b)
Accrued pension and OPEB581
410
  (j)
Retired generation facilities(c)
21
29
 X2023
Deferred Asset – Lee COLA383

  (b)
Storm cost deferrals160

 X(b)
Hedge costs deferrals(c)
101
109
 X2041
DSM/EE169
210
 (h)(h)
Vacation accrual78
83
 (e)2019
Deferred fuel and purchased power196
140
 (f)2020
Nuclear deferral87
84
  2020
PISCC(c)
34
35
 X(b)
AMI176
185
 X(b)
Other266
222
  (b)
Total regulatory assets3,977
3,152
   
Less: current portion520
299
   
Total noncurrent regulatory assets$3,457
$2,853
   
Regulatory Liabilities(a)
     
Costs of removal(c)
$1,968
$2,054
 X(g)
ARO – nuclear and other538
806
  (b)
Net regulatory liability related to income taxes(d)
3,082
3,028
  (b)
Storm reserve(c)

20
  (b)
Accrued pension and OPEB38
44
  (j)
Deferred fuel and purchased power
46
 (f)2020
Other572
359
  (b)
Total regulatory liabilities6,198
6,357
   
Less: current portion199
126
   
Total noncurrent regulatory liabilities$5,999
$6,231
   
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 23.
(e)Earns a return on outstanding balance in North Carolina.
(f)Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina.
(g)Recovered over the life of the associated assets.
(h)Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.
(i)Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders.
(j)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
2017 North Carolina Rate Case
On August 25, 2017, Duke Energy Carolinas filed an application with the NCUC for a rate increase for retail customers of approximately $647 million, which represented an approximate 13.6 percent increase in annual base revenues. The rate increase was driven by capital investments subsequent to the previous base rate case, including the W.S. Lee CC discussed below, grid improvement projects, AMI, investments in customer service technologies, costs of complying with CCR regulations and the Coal Ash Act and recovery of costs related to storm recovery. licensing and development of the Lee Nuclear Station discussed below.



FINANCIAL STATEMENTSREGULATORY MATTERS


On February 6,28, 2018, Duke Energy Carolinas and the North Carolina Public Staff (Public Staff) filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding. Terms of the settlement included a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, Duke Energy Carolinas recorded a pretax charge of approximately $4 million to Operation, maintenance and other on the Consolidated Statements of Operations.
On June 1, 2018, Duke Energy Carolinas and certain intervenors filed a Pilot Grid Rider Agreement and Stipulation (Grid Rider Stipulation) in which the parties agreed to the proposal Duke Energy Carolinas introduced in a post-hearing brief on April 27, 2018, along with additional commitments by Duke Energy Carolinas. Also on June 1, 2018, Duke Energy Carolinas and the Commercial Group filed a Partial Stipulation and Settlement Agreement to be considered in conjunction with the Stipulation.
Components of the Grid Rider Stipulation included:
Duke Energy Carolinas would recover grid improvement costs through a pilot, three-year Grid Rider except for costs related to targeted undergrounding of power lines, cable and conduit replacement, and power pole replacement;
Excluded costs were to be deferred with a return until Duke Energy Carolinas’ next base rate case proceeding; and
Costs incurred during the three-year pilot, both rider recoverable and deferred, were subject to a 4.5 percent cumulative cap of total annual electric service revenue.
On June 22, 2018, the FPSC approvedNCUC issued an order approving the Stipulation of Partial Settlement and requiring a revenue reduction. The order also included the following material components not covered in the Stipulation:
Recovery of $554 million of deferred coal ash basin closure costs over a five-year period with a return at Duke Energy Florida's motionCarolinas' WACC;
Assessment of a $70 million management penalty ratably over a five-year period by reducing the annual recovery of the deferred coal ash costs;
Denial of Duke Energy Carolinas' request for recovery of future estimated ongoing annual coal ash costs of $201 million with approval to approvedefer such costs with a stipulation that would applyreturn at Duke Energy Carolinas' WACC, to be considered for recovery in the next rate case;
Inclusion in rates of costs related to the W.S. Lee CC, two new solar facilities, and AMI deployment as requested;
Recovery of Lee Nuclear Station licensing and development cost of $347 million over a 12-year period, but denial of a return on the deferred balance of costs;
Reduction in revenue related to lower income tax savingsexpense resulting from the Tax Act, toward storm costs in lieu of implementingand a storm surcharge.
2017 Second Revised and Restated Settlement Agreement
On November 20, 2017, the FPSC issued an orderrequirement to approve the 2017 Second Revised and Restated Settlement Agreement (2017 Settlement) filed by Duke Energy Florida. The 2017 Settlement replaces and supplants the 2013 Settlement. The 2017 Settlement extends the base rate case stay-out provisionmaintain all excess deferred income tax (EDIT) resulting from the 2013 Settlement through the end of 2021 unless actual or projected return on equity falls below 9.5 percent; however, Duke Energy Florida is allowed a multiyear increase to its base rates of $67 million per year in 2019, 2020 and 2021, as well as base rate increases for solar generation. In addition to carrying forward the provisions contained in the 2013 Settlement related to the Crystal River 1 and 2 coal units discussed below and future generation needs in Florida, the 2017 Settlement contains provisions related to future investments in solar and renewable energy technology, future investments in AMI technology as well as recovery of existing meters, impacts of the Tax Act an electric vehicle charging station pilot programin a regulatory liability account pending flow back to customers as approved by the commission at the earlier of three years or Duke Energy Carolinas’ next general rate case proceeding; and the termination
Denial of the proposed Levy Nuclear Project discussed below. As partGrid Rider Stipulation related to grid improvement costs and denial of deferral accounting treatment of the 2017 Settlement,costs at this time. Duke Energy Florida will not move forward with building the Levy nuclear plant and recordedCarolinas may petition for deferral of grid modernization costs outside of a pretax impairment charge of approximately $135 million in 2017 to write off all unrecovered Levy Nuclear Projectgeneral rate case proceeding if it can show financial hardship or a stipulation that includes greater consensus among intervening parties on costs including the COL. being classified as grid modernization.
As a result of the 2017 Settlement,Order, Duke Energy Florida transferred $75Carolinas recorded a pretax charge of approximately $150 million to Impairment charges and Operation, maintenance and other on the Consolidated Statements of Operations. The charge is primarily related to the denial of a regulatory assetreturn on the Lee Nuclear Project and for previously recognized return impacted by the net book value of existing meter technology, which will be recovered over a 15-year period.
The 2017 Settlement includes provisions to recover 2017 under-recovered fuel costs of approximately $196 million over a 24-month period beginning in January 2018.coal ash management penalty described above. On September 1, 2017, Duke Energy Florida submitted AlternateJuly 27, 2018, Fuel and Capacity clause projection filings consistent with the terms of the 2017 Settlement. The updated capacity filing reflects the removal of all Levy costs. The FPSCNCUC approved Duke Energy Florida's 2018 Alternate projection filingsCarolinas' compliance filing. As a result, revised customer rates were effective on October 25, 2017.
Hines Chiller Uprate ProjectAugust 1, 2018.
On February 2, 2017,July 20, 2018, the North Carolina Attorney General filed a Notice of Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction issued by the NCUC. The Attorney General contends the commission’s order should be reversed and remanded, as it is in excess of the commission’s statutory authority; affected by errors of law; unsupported by competent, material and substantial evidence in view of the entire record as submitted; and arbitrary or capricious. The Sierra Club, North Carolina Sustainable Energy Association, North Carolina Justice Center, North Carolina Housing Coalition, Natural Resource Defense Council and Southern Alliance for Clean Energy have also filed Notices of Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction. On August 8, 2018, the Public Staff filed a Notice of Cross Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction issued by the NCUC. The Public Staff contends the commission’s order should be reversed and remanded, as it is affected by errors of law, and is unsupported by substantial evidence with regard to the commission’s failure to consider substantial evidence of coal ash related environmental violations. On November 29, 2018, the North Carolina Attorney General's Office filed a motion with the North Carolina Supreme Court requesting the court consolidate the Duke Energy FloridaCarolinas and Duke Energy Progress appeals and enter an order adopting the parties’ proposed briefing schedule as set out in the filing. On November 29, 2018, the North Carolina Supreme Court adopted a schedule for briefing set forth in the motion to consolidate the Duke Energy Carolinas and Duke Energy Progress appeals. The Appellee response briefs are due July 29, 2019. Duke Energy Carolinas cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


2018 South Carolina Rate Case
On November 8, 2018, Duke Energy Carolinas filed an application with the PSCSC for a rate increase for retail customers of approximately $168 million, which represents an approximate 10.0 percent increase in retail revenues. The rate increase is driven by capital investments and environmental compliance progress made by Duke Energy Carolinas since its previous rate case, including the further implementation of Duke Energy Carolinas’ generation modernization program, which consists of retiring, replacing and upgrading generation plants, investments in customer service technologies and continued investments in base work to maintain its transmission and distribution systems. The request includes net tax benefits resulting from the Tax Act of $66 million to reflect the change in ongoing tax expense, primarily from the reduction in the federal income tax rate from 35 to 21 percent, and $46 million to return EDIT resulting from the federal tax rate change and deferred revenues since January 2018 related to the change and benefits of $17 million from a reduction in North Carolina state income taxes allocable to South Carolina.
Duke Energy Carolinas also requested approval of its proposed Grid Improvement Plan, adjustments to its Prepaid Advantage Program and a variety of accounting orders related to ongoing costs for environmental compliance, including recovery over a five-year period of $242 million of deferred coal ash related compliance costs, grid investments between rate changes, incremental depreciation expense, a result of new depreciation rates from the depreciation study approved in the 2017 North Carolina Rate Case above, and the balance of development costs associated with the cancellation of the Lee Nuclear Project. Finally, Duke Energy Carolinas sought approval to establish a reserve and accrual for end of life nuclear costs for nuclear fuel and materials and supplies. An evidentiary hearing is scheduled to begin on March 21, 2019, and a decision and revised customer rates are expected by mid-2019. Duke Energy Carolinas cannot predict the outcome of this matter.
FERC Formula Rate Matter
On July 31, 2017, PMPA filed a petition seeking approval to includecomplaint with FERC alleging that Duke Energy Carolinas misapplied the formula rate under the PPA between the parties by including in baseits rates the revenue requirement foramortization expense associated with regulatory assets and recorded in a Chiller Uprate Project (Uprate Project) at the Hines Energy Complex. The Uprate Project was placed into service in March 2017 at a cost of approximately $150 million. The annual retail revenue requirement is approximately $19 million.certain account without FERC approval. On March 28, 2017, the FPSCFebruary 15, 2018, FERC issued an order approvingruling in favor of PMPA and ordered Duke Energy Carolinas to refund to PMPA all amounts improperly collected under the revenue requirement,PPA. Duke Energy Carolinas has issued to PMPA and similarly situated wholesale customers refunds of approximately $25 million. FERC also set the matter for settlement and hearing. PMPA and other customers filed a protest to Duke Energy Carolinas' refund report claiming that the refunds are inadequate in that (1) Duke Energy Carolinas invoked the limitations periods in the contracts to limit the time period for which was included in basethe refunds were paid and the customers disagree that this limitation applies, and (2) Duke Energy Carolinas refunded only amounts recovered through a certain account and the customers have asserted that the order applies to all regulatory assets. On July 3, 2018, FERC issued an order accepting Duke Energy Carolinas' refund report and ruling that these two claims are outside the scope of FERC's February order. The settlement agreements and revised formula rates for all parties to the first billing cycleproceeding were filed on December 28, 2018. Duke Energy Carolinas cannot predict the outcome of April 2017.this matter.
Citrus County Combined Cycle FacilityW.S. Lee CC
On October 2,April 9, 2014, the FPSCPSCSC granted Duke Energy FloridaCarolinas and NCEMC a Determination of NeedCECPCN for the construction and operation of a 1,640-MW750-megawatt (MW) combined-cycle natural gasgas-fired generating plant in Citrus County, Florida. On May 5, 2015, the Florida Department of Environmental Protection approvedat Duke Energy Florida's Site Certification Application.Carolinas' existing William States Lee Generating Station in Anderson, South Carolina. Duke Energy Carolinas began construction in July 2015 and its share of the cost to build the facility was approximately $650 million, including AFUDC. Approximately $600 million is being recovered through base rate or deferral filings in North Carolina and South Carolina. The remaining amount will be included in future rate filings. The project has received all required permits and approvals and construction began in October 2015. The facility is expected to be commercially available in 2018 at an estimated cost of $1.5 billion, including AFUDC. The plant will receive natural gas from the Sabal Trail Transmission, LLC (Sabal Trail) pipeline discussed below.
Purchase of Osprey Energy Center
Duke Energy Florida received a Civil Investigative Demand from the Department of Justice (DOJ) related to alleged violationcommenced commercial operation on April 5, 2018. NCEMC owns approximately 13 percent of the waiting period for the Hart-Scott-Rodino Antitrust Improvements Act of 1976 related to the purchase of the Osprey Energy Center, LLC, which was completed in January 2017. The DOJ alleged Duke Energy Florida assumed operational control of the Osprey Plant before the waiting period expiration on February 27, 2015. On January 17, 2017, Duke Energy Florida entered into a stipulation agreement to settle with the DOJ for $600,000 without admission of liability. On January 18, 2017, the DOJ filed a complaint and the stipulation in the U.S. District Court for the District of Columbia, which was approved by the court. A final order dismissing the case was entered in April 2017.project.
Crystal River Unit 3Lee Nuclear Station
In December 2014, the FPSC approved2007, Duke Energy Florida's decision to construct an independent spent fuel storage installation (ISFSI) for the retired Crystal River Unit 3 nuclear plant and approved Duke Energy Florida's request to defer amortization of the ISFSI pending resolution of litigation against the federal government as a result of the Department of Energy's breach of its obligation to accept spent nuclear fuel. The return rate is based on the currently approved AFUDC rate with a return on equity of 7.35 percent, or 70 percent of the currently approved 10.5 percent. The return rate is subject to change if the return on equity changes in the future. In September 2016, the FPSC approved an amendment to the 2013 Settlement authorizing recovery of the ISFSI through the Capacity Cost Recovery Clause. Through December 31, 2017, Duke Energy Florida has deferred approximately $113 million for recovery associated with building the ISFSI. See Note 5 for additional information on spent nuclear fuel litigation.
The regulatory asset associated with the original Crystal River Unit 3 power uprate project will continue to be recovered through the NCRC over an estimated seven-year period that began in 2013 with a remaining uncollected balance of $87 million at December 31, 2017.

154

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Crystal River Unit 3 Regulatory Asset
On September 15, 2015, the FPSC approved Duke Energy Florida's motion for approval of a settlement agreement with intervenors to reduce the value of the projected Crystal River Unit 3 regulatory asset to be recovered to $1.283 billion as of December 31, 2015. An impairment charge of $15 million was recognized in 2015 to adjust the regulatory asset balance. In November 2015, the FPSC issued a financing order approving Duke Energy Florida’s request to issue nuclear asset-recovery bonds to finance its unrecovered regulatory asset related to Crystal River Unit 3 through a wholly owned special purpose entity. Nuclear asset-recovery bonds replace the base rate recovery methodology authorized by the 2013 Settlement and result in a lower rate impact to customers with a recovery period of approximately 20 years.
Pursuant to provisions in Florida Statutes and the FPSC financing order, in 2016, Duke Energy Florida formed Duke Energy Florida Project Finance, LLC (DEFPF), a wholly owned, bankruptcy remote special purpose subsidiary for the purpose of issuing nuclear asset-recovery bonds. In June 2016, DEFPF issued $1,294 million aggregate principal amount of senior secured bonds (nuclear asset-recovery bonds) to finance the recovery of Duke Energy Florida's Crystal River 3 regulatory asset.
In connection with this financing, net proceeds to DEFPF of approximately $1,287 million, after underwriting costs, were used to acquire nuclear asset-recovery property from Duke Energy Florida and to pay transaction related expenses. The nuclear asset-recovery property includes the right to impose, bill, collect and adjust a non-bypassable nuclear asset-recovery charge, to be collected on a per kilowatt-hour basis, from all Duke Energy Florida retail customers until the bonds are paid in full. Duke Energy Florida began collecting the nuclear asset-recovery charge on behalf of DEFPF in customer rates in July 2016.
See Note 17 for additional information.
Levy Nuclear Project
On July 28, 2008, Duke Energy FloridaCarolinas applied to the NRC for COLs for two Westinghouse AP1000 reactors for the proposed William States Lee III Nuclear Station to be located at Levy (Levy Nuclear Project). In 2008,a site in Cherokee County, South Carolina. The NCUC and PSCSC concurred with the FPSC grantedprudency of Duke Energy Florida’s petition for an affirmative Determination of NeedCarolinas incurring certain project development and relatedpreconstruction costs through several separately issued orders, requestingalthough full cost recovery under Florida’s nuclear cost-recovery rule, together with the associated facilities, including transmission lines and substation facilities.is not guaranteed. In OctoberDecember 2016, the NRC issued COLsa COL for the proposed Levy Nuclear Plant Units 1 and 2.each reactor. Duke Energy FloridaCarolinas is not required to build the nuclear reactors as a result of the COLs being issued.
On January 28, 2014,The Duke Energy Florida terminatedCarolinas 2017 North Carolina Rate Case filing discussed above included a request to cancel the Levy engineering, procurementdevelopment of the Lee Nuclear project, recover incurred licensing and construction agreement (EPC).development costs and maintain the license issued by the NRC as an option for potential future development. The cancellation request was due to the Westinghouse bankruptcy filing and other market activity. The NCUC Order issued on June 22, 2018, approved the cancellation of the Lee Nuclear Project, allowed Duke Energy Florida may be requiredCarolinas to paycontinue to maintain the COLs, provided for work performed underrecovery of the EPC.North Carolina retail allocation of project development costs, including AFUDC accrued through December 31, 2017, over 12 years and disallowed any return on the unamortized balance during the 12-year recovery period.
Given the repeal of certain sections of the Base Load Review Act in South Carolina combined with the cancellation of the project, Duke Energy FloridaCarolinas determined that it was no longer probable it would be allowed a return on its share of project development costs attributable to South Carolina. As a result, Duke Energy Carolinas recorded an exit obligationa pretax impairment in 2014 for the terminationsecond quarter of the EPC. This liability was recorded2018 of $29 million within Other in Other Noncurrent Liabilities with an offset primarily to Regulatory assetsImpairment charges on the Consolidated Balance Sheets.Statements of Operations and Comprehensive Income.
South Carolina Petition
On June 22, 2018, Duke Energy FloridaCarolinas filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred in connection with the addition of the W.S. Lee CC, the ongoing deployment of Duke Energy Carolinas new billing and Customer Information System and the addition of the Carolinas West Primary Distribution Control Center. This request totaling approximately $33 million was approved on July 25, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


Sale of Hydroelectric (Hydro) Plants
In May 2018, Duke Energy Carolinas entered an agreement for the sale of five hydro plants with a combined 18.7-MW generation capacity in the Western Carolinas region to Northbrook Energy. The completion of the transaction is allowedsubject to recover reasonableapproval from FERC for the four FERC-licensed plants, as well as other state regulatory agencies and prudent EPC cancellation costsis contingent upon regulatory approval from the NCUC and PSCSC to defer the total estimated loss on the sale of approximately $40 million. On July 5, 2018, Duke Energy Carolinas filed with NCUC for approval of the sale of the five hydro plants to Northbrook, to transfer the CPCNs for the four North Carolina hydro plants and to establish a regulatory asset for the North Carolina retail portion of the difference between sales proceeds and net book value. On September 4, 2018, the Public Staff filed comments supporting the CPCN transfer with conditions. On September 18, 2018, Duke Energy Carolinas filed reply comments opposing the Public Staff’s proposed conditions. On November 29, 2018, the NCUC issued a procedural order and held an evidentiary hearing on this matter on February 5, 2019. On August 28, 2018, Duke Energy Carolinas filed with PSCSC its retail customers.Application for Approval of Transfer and Sale of Hydroelectric Generation Facilities, Acceptance for Filing of a Power Purchase Agreement and an Accounting Order to Establish a Regulatory Asset. On MaySeptember 10, 2018, the ORS provided a letter to the commission stating its position on the application and on September 18, 2018, Duke Energy Carolinas requested this matter be carried over to allow Duke Energy Carolinas time to discuss certain accounting issues with the ORS. On August 9, 2018, Duke Energy Carolinas and Northbrook filed a joint Application for Transfer of Licenses with the FERC. On December 27, 2018, the FERC issued its Order Approving Transfer of Licenses (“Order”) for the four FERC-licensed hydro plants. On January 18, 2019, Duke Energy Carolinas and Northbrook Carolina Hydro II, LLC requested a six-month extension of time to comply with the requirement of the Order that Northbrook submit to FERC certified copies of all instruments of conveyance and signed acceptance sheets within 60 days of the date of the Order, given that compliance by the deadline set in the Order is not possible because the conveyance of the projects is contingent on the receipt of state regulatory approvals, which are not anticipated to be issued by February 25, 2019.
If commission approvals are not received, Duke Energy Carolinas can cancel the sales agreement and retain the hydro facilities. If commission approvals are received, the closing is expected to occur during the second quarter of 2019. After closing, Duke Energy Carolinas will purchase all the capacity and energy generated by these facilities at the avoided cost for five years through power purchase agreements. Duke Energy Carolinas cannot predict the outcome of this matter.
Duke Energy Progress
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.
 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash$2,051
$1,975
 (h)(b)
AROs – nuclear and other429
359
  (c)
Accrued pension and OPEB542
430
  (k)
Retired generation facilities148
170
 X(b)
Storm cost deferrals(d)
571
150
 X(b)
Hedge costs deferrals54
64
  (b)
DSM/EE(e)
235
264
 (i)(i)
Vacation accrual41
42
  2019
Deferred fuel and purchased power397
130
 (f)2020
Nuclear deferral46
35
  2020
PISCC and deferred operating expenses36
38
 X2054
AMI67
75
  (b)
NCEMPA deferrals50
53
 (g)2042
Other147
74
  (b)
Total regulatory assets4,814
3,859
   
Less: current portion703
352
   
Total noncurrent regulatory assets$4,111
$3,507
   
Regulatory Liabilities(a)
     
Costs of removal$1,878
$2,122
 X(j)
Accrued pension and OPEB93

  (k)
Net regulatory liability related to income taxes(l)
1,863
1,854
  (b)
Deferred fuel and purchased power
1
 (f)2020
Other299
161
  (b)
Total regulatory liabilities4,133
4,138
   
Less: current portion178
139
   
Total noncurrent regulatory liabilities$3,955
$3,999
   



FINANCIAL STATEMENTSREGULATORY MATTERS


(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit.
(d)South Carolina storm costs are included in rate base.
(e)Included in rate base.
(f)Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina.
(g)South Carolina retail allocated costs are earning a return.
(h)Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders.
(i)Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.
(j)Recovered over the life of the associated assets.
(k)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
(l)Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 23.
2017 North Carolina Rate Case
On June 1, 2017, Duke Energy FloridaProgress filed an application with the NCUC for a rate increase for retail customers of approximately $477 million, which represented an approximate 14.9 percent increase in annual base revenues. Subsequent to the filing, Duke Energy Progress adjusted the requested amount to $420 million, representing an approximate 13 percent increase. The rate increase is driven by capital investments subsequent to the previous base rate case, costs of complying with CCR regulations and the Coal Ash Act, costs relating to storm recovery, investments in customer service technologies and recovery of costs associated with renewable purchased power.
On December 16, 2016, Duke Energy Progress filed a requestpetition with the FPSCNCUC requesting an accounting order to defer certain costs incurred in connection with response to Hurricane Matthew and other significant storms in 2016. The final estimate of incremental operation and maintenance and capital costs of $116 million was filed with the NCUC in September 2017. On July 10, 2017, the NCUC consolidated Duke Energy Progress' storm deferral request into the Duke Energy Progress rate case docket for decision.
On November 22, 2017, Duke Energy Progress and the Public Staff filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding. Terms of the settlement included a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, in 2017 Duke Energy Progress recorded pretax charges totaling approximately $25 million to Impairment charges and Operation, maintenance and other on the Consolidated Statements of Operations, principally related to disallowances from rate base of certain projects at the Mayo and Sutton plants. On February 23, 2018, the NCUC issued an order approving the stipulation. The order also included the following material components not covered in the stipulation:
Recovery of the remaining $234 million of deferred coal ash basin closure costs over a five-year period with a return at Duke Energy Progress' WACC, excluding $10 million of retail deferred coal ash basin costs related to ash hauling at Duke Energy Progress' Asheville Plant;
Assessment of a $30 million management penalty ratably over a five-year period by reducing the annual recovery of the deferred coal ash costs;
Denial of Duke Energy Progress' request for recovery of future estimated ongoing annual coal ash costs of $129 million with approval to defer such costs with a return at Duke Energy Progress' WACC, to be considered for recovery in the next rate case; and
Approval to recover approximately $82$51 million of Levy Nuclear Projectthe approximately $80 million deferred storm costs over a five-year period with amortization beginning in October 2016. The order did not allow the deferral of the associated capital costs or a return on the deferred balance during the deferral period.
The order also impacted certain amounts that were similarly recorded on Duke Energy Carolinas' Consolidated Balance Sheets. As a result of the order, Duke Energy Progress and Duke Energy Carolinas recorded pretax charges of $68 million and $14 million, respectively, in the first quarter of 2018 to Impairment charges, Operation, maintenance and other and Interest Expense on the Consolidated Statements of Operations. These charges primarily related to the coal ash basin disallowance and previously recognized return impacted by the coal ash management penalty and deferred storm cost adjustments. Revised customer rates became effective on March 16, 2018.
On May 15, 2018, the Public Staff filed a Notice of Cross Appeal to the North Carolina Supreme Court from the February 23, 2018, Order Accepting Stipulation, Deciding Contested Issues and Granting Partial Rate Increase issued by the NCUC. The Public Staff contend the commission’s order should be reversed and remanded, as it is affected by errors of law, and is unsupported by competent, material and substantial evidence in view of the entire record as submitted. The North Carolina Attorney General and Sierra Club have also filed Notices of Appeal to the North Carolina Supreme Court from the February 23, 2018, Order Accepting Stipulation, Deciding Contested Issues and Granting Partial Rate Increase. On November 29, 2018, the North Carolina Attorney General's Office filed a motion with the North Carolina Supreme Court requesting the court consolidate the Duke Energy Progress and Duke Energy Carolinas appeals and enter an order adopting the parties’ proposed briefing schedule as set out in the filing. On November 29, 2018, the North Carolina Supreme Court adopted a schedule for briefing set forth in the motion to consolidate the Duke Energy Progress and Duke Energy Carolinas appeals. The Appellee response briefs are due July 29, 2019. Duke Energy Progress cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


2016 South Carolina Rate Case
In December 2016, the PSCSC approved a rate case settlement agreement among the ORS, intervenors and Duke Energy Progress. Terms of the settlement agreement included an approximate $56 million increase in revenues over a two-year period. An increase of approximately $38 million in revenues was effective January 1, 2017, and an additional increase of approximately $19 million in revenues was effective January 1, 2018. Duke Energy Progress amortized approximately $19 million from the cost of removal reserve in 2017. Other settlement terms included a rate of return on equity of 10.1 percent, recovery of coal ash costs incurred from January 1, 2015, through June 30, 2016, over a 15‑year period and ongoing deferral of allocated ash basin closure costs from July 1, 2016, until the next base rate case. The settlement also provides that Duke Energy Progress will not seek an increase in rates in South Carolina to occur prior to 2019, with limited exceptions.
2018 South Carolina Rate Case
On November 8, 2018, Duke Energy Progress filed an application with the PSCSC for a rate increase for retail customers of approximately $59 million, which represents an approximate 10.3 percent increase in annual base revenues. The rate increase is driven by capital investments and environmental compliance progress made by Duke Energy Progress since its previous rate case, including the further implementation of Duke Energy Progress’ generation modernization program, which consists of retiring, replacing and upgrading generation plants, investments in customer service technologies and continued investments in base work to maintain its transmission and distribution systems. The request includes net tax benefits of $15 million consisting of a $12 million increase due to the expiration of EDITs related to reductions in North Carolina state income taxes allocable to South Carolina and decreases resulting from the Tax Act of $17 million to reflect the change in ongoing tax expense, primarily the reduction in the federal income tax rate from 35 to 21 percent, and $10 million to return EDIT resulting from the federal tax rate change and deferred revenues since January 2018 related to the change.
Duke Energy Progress also requested approval of its proposed Grid Improvement Plan, approval of a Prepaid Advantage Program and a variety of accounting orders related to ongoing costs for environmental compliance, including recovery over a five-year period of $51 million of deferred coal ash related compliance costs, AMI deployment, grid investments between rate changes and regulatory asset treatment related to the retirement of a generating plant located in Asheville, North Carolina. Finally, Duke Energy Progress sought approval to establish a reserve and accrual for end of life nuclear costs for materials and supplies and nuclear fuel. An evidentiary hearing is scheduled to begin on April 11, 2019, and a decision and revised customer rates are expected by mid-2019. Duke Energy Progress cannot predict the outcome of this matter.
Western Carolinas Modernization Plan
On November 4, 2015, Duke Energy Progress announced a Western Carolinas Modernization Plan, which included retirement of the existing Asheville coal-fired plant, the construction of two 280MW combined-cycle natural gas plants having dual-fuel capability, with the option to build a third natural gas simple cycle unit in 2023 based upon the outcome of initiatives to reduce the region's power demand. The plan also included upgrades to existing transmission lines and substations, installation of solar generation and a pilot battery storage project. These investments will be made within the next seven years. Duke Energy Progress is also working with the local natural gas distribution company to upgrade an existing natural gas pipeline to serve the natural gas plant.
On March 28, 2016, the NCUC issued an order approving a CPCN for the new combined-cycle natural gas plants, but denying the CPCN for the contingent simple cycle unit without prejudice to Duke Energy Progress to refile for approval in the future. On March 28, 2018, Duke Energy Progress filed an annual progress report for the construction of the combined-cycle plants with the NCUC, with an estimated cost of $893 million. Site preparation activities for the combined-cycle plants are complete and construction of these plants began in 2017, with an expected in-service date in late 2019.
On October 8, 2018, Duke Energy Progress filed an application with the NCUC for a CPCN to construct the Hot Springs Microgrid Solar and Battery Storage Facility. On November 30, 2018, the NCUC issued an order scheduling hearings, requiring filing of testimony, establishing discovery guidelines and requiring public notice. On February 7, 2019, Duke Energy Progress made a joint filing with the Public Staff, which accepted the Public Staff’s proposed conditions and requested that the NCUC cancel the evidentiary hearing. Duke Energy Progress cannot predict the outcome of this matter.
The carrying value of the 376-MW Asheville coal-fired plant, including associated ash basin closure costs, of $327 million and $385 million is included in Generation facilities to be retired, net on Duke Energy Progress' Consolidated Balance Sheets as of December 31, 2018, and 2017, respectively. Duke Energy Progress' request for a regulatory asset at the time of retirement with amortization over a 10-year period was approved by the NCUC on February 23, 2018.
Shearon Harris Nuclear Plant Expansion
In 2006, Duke Energy Progress selected a site at Harris to evaluate for possible future nuclear expansion. On February 19, 2008, Duke Energy Progress filed its COL application with the NRC for two Westinghouse AP1000 reactors at Harris, which the NRC docketed for review. On May 2, 2013, Duke Energy Progress filed a letter with the NRC requesting the NRC to suspend its review activities associated with the COL at the Harris site. The NCUC and PSCSC approved deferral of retail costs. Total deferred costs are approximately $43 million as of December 31, 2018, and are recorded in Regulatory assets on Duke Energy Progress’ Consolidated Balance Sheets. On November 17, 2016, the FERC approved Duke Energy Progress’ rate recovery request filing for the wholesale ratepayers’ share of the abandonment costs, including a debt-only return to be recovered through revised formula rates and amortized over a 15-year period beginning May 1, 2014. As part of the settlement agreement for the 2017 SettlementNorth Carolina Rate Case discussed above, Duke Energy FloridaProgress will amortize the regulatory asset over an eight-year period. NCUC approved the settlement on February 23, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


South Carolina Petitions
On June 22, 2018, Duke Energy Progress filed a petition with the PSCSC seeking an accounting order authorizing Duke Energy Progress to adopt new depreciation rates, effective March 16, 2018, that reflect the results of Duke Energy Progress’ most recent depreciation study. Also on June 22, 2018, Duke Energy Progress filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred in connection with the deployment of AMI, the ongoing deployment of Duke Energy Progress' new billing and Customer Information System, new depreciation rates and costs incurred in connection with the return of certain excess deferred state income taxes from North Carolina. These requests totaling approximately $20 million were approved on July 25, 2018.
FERC Form 1 Reporting Matter
On October 18, 2017, Fayetteville Public Works Commission (FPWC) filed with FERC a complaint against Duke Energy Progress. In the complaint, FPWC alleges that Duke Energy Progress’ change in its method of reporting materials and supplies inventory on FERC Form 1 for 2015 constituted a change in accounting practice that Duke Energy Progress was not permitted to implement without first obtaining FERC approval. On April 23, 2018, FERC issued an order finding that Duke Energy Progress’ new reporting methodology was not proper and required Duke Energy Progress to revise its FERC Form 1s beginning in 2014 and to issue refunds to formula rate customers. Duke Energy Progress estimates that these refunds will total approximately $14 million. On May 23, 2018, Duke Energy Progress filed a request for rehearing alleging that FERC’s order is no longer seeking recoveryincorrect. Duke Energy Progress revised its FERC Form 1 filings in June 2018. On August 31, 2018, Duke Energy Progress filed with FERC a refund report memorializing its payment of costsrefunds to FPWC. Duke Energy Progress cannot predict the outcome of this matter.
Tax Act
As ordered by the NCUC on October 5, 2018, Duke Energy Progress filed a proposal on October 25, 2018, to adjust rates to reflect the reduction in federal corporate income tax rate from 35 to 21 percent for taxable years beginning after December 31, 2017, as outlined in the Tax Act. Duke Energy Progress proposed that this rate decrement be effective for service rendered on and after December 1, 2018. On November 28, 2018, the NCUC approved the proposal to implement the change in the federal corporate income tax rate and effective December 1, 2018, Duke Energy Progress implemented the rate reduction. Also, as ordered by the NCUC on October 5, 2018, Duke Energy Progress shall continue to hold in a deferred regulatory liability account the difference between revenues billed under the prior federal corporate income tax rate and the federal corporate income tax rate resulting from the Tax Act for the period January 1, 2018 through November 30, 2018. The disposition of such regulatory liability may be considered in Duke Energy Progress' next general rate case proceeding or in three years, whichever is sooner. EDIT related to the Levy Nuclear Project andcorporate income tax rate reduction shall be held in a deferred tax regulatory liability account until they can be addressed for ratemaking purposes in the ongoing Westinghouse litigation discussednext general rate case proceeding or in Note 5. All remaining Levy Nuclear Project issues have been resolved.three years, whichever is sooner.
Crystal River 1 and 2 Coal Units



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Florida has evaluated Crystal River 1
Regulatory Assets and 2 coal units for retirement in order to comply with certain environmental regulations. BasedLiabilities
The following tables present the regulatory assets and liabilities recorded on this evaluation, those units are expected to be retired by the end of 2018. Once those units are retired Duke Energy Florida will continue recovery of existing annual depreciation expense through the end of 2020. Beginning in 2021, Duke Energy Florida will be allowed to recover any remaining net book value of the assets from retail customers through the Capacity Cost Recovery Clause.

155

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes ToFlorida's Consolidated Financial Statements – (Continued)Balance Sheets.

 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash(c)
$10
$9
  (b)
AROs – nuclear and other(c)
172
296
  (b)
Accrued pension and OPEB(c)
532
476
 X(g)
Retired generation facilities(c)
219
216
 X(b)
Storm cost deferrals(c)(h)
382
376
 (e)2021
Nuclear asset securitized balance, net1,093
1,142
  2036
Hedge costs deferrals20
30
  2020
DSM/EE(c)
21
17
 X2023
Deferred fuel and purchased power(c)
203
219
 (f)2020
AMI(c)
60
75
 X2032
Other176
36
 (d)(b)
Total regulatory assets2,888
2,892
   
Less: current portion434
389
   
Total noncurrent regulatory assets$2,454
$2,503
   
Regulatory Liabilities(a)
     
Costs of removal(c)
$257
$415
 (d)(b)
Net regulatory liability related to income taxes(c)
847
948
  (b)
Accrued pension and OPEB56

 X(g)
Deferred fuel and purchased power(c)
16

 (f)2020
Other20
18
 (d)(b)
Total regulatory liabilities1,196
1,381
   
Less: current portion102
74
   
Total noncurrent regulatory liabilities$1,094
$1,307
   
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Certain costs earn a return.
(e)Earns a debt return/interest once collections begin.
(f)Earns commercial paper rate.
(g)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
(h)Balance includes $165 million for Hurricane Michael. Duke Energy Florida expects to seek recovery of these costs in the first half of 2019.
Duke Energy Ohio
Duke Energy Ohio has two reportable segments, Electric Utilities and Infrastructure and Gas Utilities and Infrastructure.
Electric Utilities and Infrastructure transmits and distributes electricity in portions of Ohio and generates, distributes and sells electricity in portions of Northern Kentucky. Gas Utilities and Infrastructure transports and sells natural gas in portions of Ohio and Northern Kentucky. Both reportable segments conduct operations primarily through Duke Energy Ohio and its wholly owned subsidiary, Duke Energy Kentucky.
The remainder of Duke Energy Ohio's operations is presented as Other. In December 2018, the PUCO approved an order which allows the recovery or credit of revenues and expenses related to Duke Energy Ohio's contractual arrangement to buy power from OVEC power plants. Due to the change in regulatory treatment of these amounts, OVEC revenues and expenses are now reflected in the Electric Utilities and Infrastructure segment. Previously, OVEC revenues and expense were included in Other. These amounts are deemed immaterial for Duke Energy Ohio. Therefore, no prior period amounts were restated. See Note 4 for additional information on the PUCO order.



FINANCIAL STATEMENTSBUSINESS SEGMENTS


All Duke Energy Ohio assets and revenues from continuing operations are within the U.S.
  Year Ended December 31, 2018
 Electric
 Gas
 Total
    
 Utilities and
 Utilities and
 Reportable
    
(in millions)  
Infrastructure
 Infrastructure
 Segments
 Other
 Total
Total revenues$1,450
 $506
 $1,956
 $1
 $1,957
Interest expense  $67
 $24
 $91
 $1
 $92
Depreciation and amortization  183
 85
 268
 
 268
Income tax expense (benefit)  47
 24
 71
 (28) 43
Segment income (loss)/Net income(a)
186
 93
 279
 (103) 176
Capital expenditures  $655
 $172
 $827
 $
 $827
Segment assets  5,643
 2,874
 8,517
 38
 8,555
(a)    Other includes the loss on the sale of Beckjord, see discussion above.
 Year Ended December 31, 2017
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,373
 $508
 $1,881
 $42
 $
 $1,923
Interest expense  $62
 $28
 $90
 $1
 $
 $91
Depreciation and amortization  178
 83
 261
 
 
 261
Income tax expense (benefit)  40
 39
 79
 (20) 
 59
Segment income (loss)138
 85
 223
 (30) 
 193
Loss from discontinued operations, net of tax          (1)
Net income

 

 

 

   $192
Capital expenditures  $491
 $195
 $686
 $
 $
 $686
Segment assets  5,066
 2,758
 7,824
 66
 (15) 7,875
 Year Ended December 31, 2016
 Electric
 Gas
 Total
      
 Utilities and
 Utilities and
 Reportable
      
(in millions)  Infrastructure
 Infrastructure
 Segments
 Other
 Eliminations
 Total
Total revenues$1,410
 $503
 $1,913
 $31
 $
 $1,944
Interest expense  $58
 $27
 $85
 $1
 $
 $86
Depreciation and amortization  151
 80
 231
 2
 
 233
Income tax expense (benefit)  55
 44
 99
 (21) 
 78
Segment income (loss)154
 77
 231
 (39) 
 192
Income from discontinued operations, net of tax          36
Net income

 

 

 

   $228
Capital expenditures  $322
 $154
 $476
 $
 $
 $476
Segment assets4,782
 2,696
 7,478
 62
 (12) 7,528



FINANCIAL STATEMENTSREGULATORY MATTERS


4. REGULATORY MATTERS
REGULATORY ASSETS AND LIABILITIES
The Duke Energy Registrants record regulatory assets and liabilities that result from the ratemaking process. See Note 1 for further information.
The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.
 Duke Energy Progress Energy
 December 31, December 31,
(in millions)2018
 2017
 2018
 2017
Regulatory Assets       
AROs – coal ash$4,255
 $4,025
 $2,061
 $1,984
AROs – nuclear and other772
 852
 601
 655
Accrued pension and OPEB2,654
 2,249
 1,074
 906
Retired generation facilities445
 480
 367
 386
Debt fair value adjustment1,099
 1,197
 
 
Deferred asset – Lee COLA383
 
 
 
Storm cost deferrals1,117
 531
 953
 526
Nuclear asset securitized balance, net1,093
 1,142
 1,093
 1,142
Hedge costs deferrals204
 234
 74
 94
Derivatives – natural gas supply contracts141
 142
 
 
Demand side management (DSM)/Energy efficiency (EE)449
 530
 256
 281
Grid modernization31
 39
 
 
Vacation accrual213
 213
 41
 42
Deferred fuel and purchased power838
 507
 600
 349
Nuclear deferral133
 119
 46
 35
Post-in-service carrying costs (PISCC) and deferred operating expenses320
 366
 36
 38
Transmission expansion obligation39
 46
 
 
Manufactured gas plant (MGP)99
 91
 
 
Advanced metering infrastructure (AMI)367
 362
 127
 150
NCEMPA deferrals50
 53
 50
 53
East Bend deferrals47
 45
 
 
Deferred pipeline integrity costs65
 54
 
 
Amounts due from customers24
 64
 
 
Other784
 538
 322
 110
Total regulatory assets15,622
 13,879

7,701

6,751
Less: current portion2,005
 1,437
 1,137
 741
Total noncurrent regulatory assets$13,617
 $12,442

$6,564

$6,010
Regulatory Liabilities       
Costs of removal$5,421
 $5,968
 $2,135
 $2,537
AROs – nuclear and other538
 806
 
 
Net regulatory liability related to income taxes8,058
 8,113
 2,710
 2,802
Amounts to be refunded to customers34
 10
 
 
Storm reserve
 20
 
 
Accrued pension and OPEB301
 146
 149
 
Deferred fuel and purchased power16
 47
 16
 1
Other1,064
 622
 319
 179
Total regulatory liabilities15,432
 15,732
 5,329
 5,519
Less: current portion598
 402
 280
 213
Total noncurrent regulatory liabilities$14,834
 $15,330
 $5,049
 $5,306
Descriptions of regulatory assets and liabilities summarized in the tables above and below follow. See tables below for recovery and amortization periods at the separate registrants.



FINANCIAL STATEMENTSREGULATORY MATTERS


AROs coal ash. Represents deferred depreciation and accretion related to the legal obligation to close ash basins. The costs are deferred until recovery treatment has been determined. See Notes 1 and 9 for additional information.
AROs nuclear and other. Represents regulatory assets or liabilities, including deferred depreciation and accretion, related to legal obligations associated with the future retirement of property, plant and equipment, excluding amounts related to coal ash. The AROs relate primarily to decommissioning nuclear power facilities. The amounts also include certain deferred gains and losses on NDTF investments. See Notes 1 and 9 for additional information.
Accrued pension and OPEB. Accrued pension and OPEB represent regulatory assets and liabilities related to each of the Duke Energy Registrants’ respective shares of unrecognized actuarial gains and losses and unrecognized prior service cost and credit attributable to Duke Energy’s pension plans and OPEB plans. The regulatory asset or liability is amortized with the recognition of actuarial gains and losses and prior service cost and credit to net periodic benefit costs for pension and OPEB plans. The accrued pension and OPEB regulatory asset is expected to be recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
Retired generation facilities. Represents amounts to be recovered for facilities that have been retired and are probable of recovery.
Debt fair value adjustment. Purchase accounting adjustments recorded to state the carrying value of Progress Energy and Piedmont at fair value in connection with the 2012 and 2016 mergers, respectively. Amount is amortized over the life of the related debt.
Net regulatory asset or liability related to income taxes. Amounts for all registrants include regulatory liabilities related primarily to impacts from the Tax Act. See Note 23 for additional information. Amounts have no immediate impact on rate base as regulatory assets are offset by deferred tax liabilities.
Deferred asset – Lee COLA. Represents deferred costs incurred for the canceled Lee nuclear project.
Storm cost deferrals. Represents deferred incremental costs incurred related to extraordinary weather-related events.
Nuclear asset securitized balance, net.Represents the balance associated with Crystal River Unit 3 retirement approved for recovery by the FPSC on September 15, 2015, and the upfront financing costs securitized in 2016 with issuance of the associated bonds. The regulatory asset balance is net of the AFUDC equity portion.
Hedge costs and other deferrals. Amounts relate to unrealized gains and losses on derivatives recorded as a regulatory asset or liability, respectively, until the contracts are settled.
Derivatives – natural gas supply contracts. Represents costs for certain long-dated, fixed quantity forward gas supply contracts, which are recoverable through PGA clauses.
DSM/EE. Deferred costs related to various DSM and EE programs recoverable through various mechanisms.
Grid modernization. Amounts represent deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service.
Vacation accrual. Represents.vacation entitlement, which is generally recovered in the following year.
Deferred fuel and purchased power. Represents certain energy-related costs that are recoverable or refundable as approved by the applicable regulatory body.
Nuclear deferral. Includes amounts related to levelizing nuclear plant outage costs, which allows for the recognition of nuclear outage expenses over the refueling cycle rather than when the outage occurs, resulting in the deferral of operations and maintenance costs associated with refueling.
Post-in-service carrying costs and deferred operating expenses. Represents deferred depreciation and operating expenses as well as carrying costs on the portion of capital expenditures placed in service but not yet reflected in retail rates as plant in service.
Transmission expansion obligation. Represents transmission expansion obligations related to Duke Energy Ohio’s withdrawal from Midcontinent Independent System Operator, Inc. (MISO).
MGP. Represents remediation costs incurred at former MGP sites and the deferral of costs to be incurred at Duke Energy Ohio's East End and West End sites.
AMI. Represents deferred costs related to the installation of AMI meters and remaining net book value of non-AMI meters to be replaced at Duke Energy Carolinas, net book value of existing meters at Duke Energy Florida, Duke Energy Progress and Duke Energy Ohio and expected future recovery of net book value of electromechanical meters that have been replaced with AMI meters at Duke Energy Indiana.
NCEMPA deferrals. Represents retail allocated cost deferrals and returns associated with the additional ownership interest in assets acquired from NCEMPA in 2015.
East Bend deferrals. Represents both deferred operating expenses and deferred depreciation as well as carrying costs on the portion of East Bend that was acquired from Dayton Power and Light and that had been previously operated as a jointly owned facility.
Deferred pipeline integrity costs. Represents pipeline integrity management costs in compliance with federal regulations recovered through a rider mechanism.



FINANCIAL STATEMENTSREGULATORY MATTERS


Amounts due from customers. Relates primarily to margin decoupling and IMR recovery mechanisms.
Costs of removal. Represents funds received from customers to cover the future removal of property, plant and equipment from retired or abandoned sites as property is retired. Also includes certain deferred gains on NDTF investments.
Amounts to be refunded to customers. Represents required rate reductions to retail customers by the applicable regulatory body.
Storm reserve. Amounts are used to offset future incurred costs for named storms as approved by regulatory commissions.
RESTRICTIONS ON THE ABILITY OF CERTAIN SUBSIDIARIES TO MAKE DIVIDENDS, ADVANCES AND LOANS TO DUKE ENERGY
As a condition to the approval of merger transactions, the NCUC, PSCSC, PUCO, KPSC and IURC imposed conditions on the ability of Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio, Duke Energy Kentucky, Duke Energy Indiana and Piedmont to transfer funds to Duke Energy through loans or advances, as well as restricted amounts available to pay dividends to Duke Energy. Certain subsidiaries may transfer funds to the parent by obtaining approval of the respective state regulatory commissions. These conditions imposed restrictions on the ability of the public utility subsidiaries to pay cash dividends as discussed below.
Duke Energy Progress and Duke Energy Florida also have restrictions imposed by their first mortgage bond indentures, which in certain circumstances, limit their ability to make cash dividends or distributions on common stock. Amounts restricted as a result of these provisions were not material at December 31, 2018.
Additionally, certain other subsidiaries of Duke Energy have restrictions on their ability to dividend, loan or advance funds to Duke Energy due to specific legal or regulatory restrictions, including, but not limited to, minimum working capital and tangible net worth requirements.
The restrictions discussed below were not a material amount of Duke Energy's and Progress Energy's net assets at December 31, 2018.
Duke Energy Carolinas
Duke Energy Carolinas must limit cumulative distributions subsequent to mergers to (i) the amount of retained earnings on the day prior to the closing of the mergers, plus (ii) any future earnings recorded.
Duke Energy Progress
Duke Energy Progress must limit cumulative distributions subsequent to the mergers between Duke Energy and Progress Energy and Duke Energy and Piedmont to (i) the amount of retained earnings on the day prior to the closing of the respective mergers, plus (ii) any future earnings recorded.
Duke Energy Ohio
Duke Energy Ohio will not declare and pay dividends out of capital or unearned surplus without the prior authorization of the PUCO. Duke Energy Ohio received FERC and PUCO approval to pay dividends from its equity accounts that are reflective of the amount that it would have in its retained earnings account had push-down accounting for the Cinergy merger not been applied to Duke Energy Ohio’s balance sheet. The conditions include a commitment from Duke Energy Ohio that equity, adjusted to remove the impacts of push-down accounting, will not fall below 30 percent of total capital.
Duke Energy Kentucky is required to pay dividends solely out of retained earnings and to maintain a minimum of 35 percent equity in its capital structure.
Duke Energy Indiana
Duke Energy Indiana must limit cumulative distributions subsequent to the merger between Duke Energy and Cinergy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded. In addition, Duke Energy Indiana will not declare and pay dividends out of capital or unearned surplus without prior authorization of the IURC.
Piedmont
Piedmont must limit cumulative distributions subsequent to the acquisition of Piedmont by Duke Energy to (i) the amount of retained earnings on the day prior to the closing of the merger, plus (ii) any future earnings recorded.
RATE-RELATED INFORMATION
The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects.
Duke Energy Carolinas and Duke Energy Progress
Grid Improvement – South Carolina
On June 22, 2018, Duke Energy Carolinas and Duke Energy Progress filed a joint petition with the PSCSC seeking an accounting order authorizing deferral of certain costs incurred in connection with grid reliability, resiliency and modernization work that is being performed under the companies’ grid improvement initiative. On October 3, 2018, the PSCSC granted Duke Energy Carolinas' and Duke Energy Progress' joint petition, which authorizes the deferral of these costs until the rate effective dates of each Company’s next general rate case.



FINANCIAL STATEMENTSREGULATORY MATTERS


Hurricane Florence, Hurricane Michael and Winter Storm Diego
In September 2018, Hurricane Florence made landfall and inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 2 million customers were impacted. The companies incurred approximately $500 million in incremental operation and maintenance expenses ($70 million and $430 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $90 million in capital costs ($5 million and $85 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the hurricane restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
In October 2018, the remnants of Hurricane Michael inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 1 million customers were impacted. The companies incurred approximately $100 million in incremental operation and maintenance expenses ($75 million and $25 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $21 million in capital costs ($12 million and $9 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the hurricane restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
In December 2018, Winter Storm Diego inflicted severe damage to the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 800,000 customers were impacted. The companies incurred approximately $85 million in incremental operation and maintenance expenses ($60 million and $25 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) and approximately $9 million in capital costs ($7 million and $2 million for Duke Energy Carolinas and Duke Energy Progress, respectively,) which are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018, resulting from the winter storm restoration efforts. Most of the operation and maintenance expenses are deferred in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. The balance of operation and maintenance expenses are included in Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
On December 21, 2018, Duke Energy Carolinas and Duke Energy Progress filed with the NCUC petitions for approval to defer the incremental costs incurred to a regulatory asset for recovery in the next base rate case. The NCUC issued an order requesting comments on the deferral positions. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of this matter. Duke Energy Progress filed a similar request with the PSCSC on January 11, 2019, which also included a request for the continuation of prior deferrals requested for ice storms and Hurricane Matthew, and on January 30, 2019, the PSCSC issued a directive approving the deferral request.
North Carolina State Corporate Income Tax
On December 12, 2018, Duke Energy Carolinas and Duke Energy Progress filed requests to reduce their rates effective January 1, 2019, based on a reduction in North Carolina’s corporate income tax rate from 3 to 2.5 percent, as enacted by the General Assembly in Session Law 2017-57, which became law on June 28, 2017, with an effective date of January 1, 2019. On December 17, 2018, the NCUC issued orders approving the Duke Energy Carolinas and Duke Energy Progress rate decrements.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Carolinas
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.
 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash$1,725
$1,645
 (i)(b)
Accrued pension and OPEB581
410
  (j)
Retired generation facilities(c)
21
29
 X2023
Deferred Asset – Lee COLA383

  (b)
Storm cost deferrals160

 X(b)
Hedge costs deferrals(c)
101
109
 X2041
DSM/EE169
210
 (h)(h)
Vacation accrual78
83
 (e)2019
Deferred fuel and purchased power196
140
 (f)2020
Nuclear deferral87
84
  2020
PISCC(c)
34
35
 X(b)
AMI176
185
 X(b)
Other266
222
  (b)
Total regulatory assets3,977
3,152
   
Less: current portion520
299
   
Total noncurrent regulatory assets$3,457
$2,853
   
Regulatory Liabilities(a)
     
Costs of removal(c)
$1,968
$2,054
 X(g)
ARO – nuclear and other538
806
  (b)
Net regulatory liability related to income taxes(d)
3,082
3,028
  (b)
Storm reserve(c)

20
  (b)
Accrued pension and OPEB38
44
  (j)
Deferred fuel and purchased power
46
 (f)2020
Other572
359
  (b)
Total regulatory liabilities6,198
6,357
   
Less: current portion199
126
   
Total noncurrent regulatory liabilities$5,999
$6,231
   
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 23.
(e)Earns a return on outstanding balance in North Carolina.
(f)Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina.
(g)Recovered over the life of the associated assets.
(h)Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.
(i)Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders.
(j)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
2017 North Carolina Rate Case
On August 25, 2017, Duke Energy Carolinas filed an application with the NCUC for a rate increase for retail customers of approximately $647 million, which represented an approximate 13.6 percent increase in annual base revenues. The rate increase was driven by capital investments subsequent to the previous base rate case, including the W.S. Lee CC discussed below, grid improvement projects, AMI, investments in customer service technologies, costs of complying with CCR regulations and the Coal Ash Act and recovery of costs related to licensing and development of the Lee Nuclear Station discussed below.



FINANCIAL STATEMENTSREGULATORY MATTERS


On February 28, 2018, Duke Energy Carolinas and the North Carolina Public Staff (Public Staff) filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding. Terms of the settlement included a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, Duke Energy Carolinas recorded a pretax charge of approximately $4 million to Operation, maintenance and other on the Consolidated Statements of Operations.
On June 1, 2018, Duke Energy Carolinas and certain intervenors filed a Pilot Grid Rider Agreement and Stipulation (Grid Rider Stipulation) in which the parties agreed to the proposal Duke Energy Carolinas introduced in a post-hearing brief on April 27, 2018, along with additional commitments by Duke Energy Carolinas. Also on June 1, 2018, Duke Energy Carolinas and the Commercial Group filed a Partial Stipulation and Settlement Agreement to be considered in conjunction with the Stipulation.
Components of the Grid Rider Stipulation included:
Duke Energy Carolinas would recover grid improvement costs through a pilot, three-year Grid Rider except for costs related to targeted undergrounding of power lines, cable and conduit replacement, and power pole replacement;
Excluded costs were to be deferred with a return until Duke Energy Carolinas’ next base rate case proceeding; and
Costs incurred during the three-year pilot, both rider recoverable and deferred, were subject to a 4.5 percent cumulative cap of total annual electric service revenue.
On June 22, 2018, the NCUC issued an order approving the Stipulation of Partial Settlement and requiring a revenue reduction. The order also included the following material components not covered in the Stipulation:
Recovery of $554 million of deferred coal ash basin closure costs over a five-year period with a return at Duke Energy Carolinas' WACC;
Assessment of a $70 million management penalty ratably over a five-year period by reducing the annual recovery of the deferred coal ash costs;
Denial of Duke Energy Carolinas' request for recovery of future estimated ongoing annual coal ash costs of $201 million with approval to defer such costs with a return at Duke Energy Carolinas' WACC, to be considered for recovery in the next rate case;
Inclusion in rates of costs related to the W.S. Lee CC, two new solar facilities, and AMI deployment as requested;
Recovery of Lee Nuclear Station licensing and development cost of $347 million over a 12-year period, but denial of a return on the deferred balance of costs;
Reduction in revenue related to lower income tax expense resulting from the Tax Act, and a requirement to maintain all excess deferred income tax (EDIT) resulting from the Tax Act in a regulatory liability account pending flow back to customers as approved by the commission at the earlier of three years or Duke Energy Carolinas’ next general rate case proceeding; and
Denial of the proposed Grid Rider Stipulation related to grid improvement costs and denial of deferral accounting treatment of the costs at this time. Duke Energy Carolinas may petition for deferral of grid modernization costs outside of a general rate case proceeding if it can show financial hardship or a stipulation that includes greater consensus among intervening parties on costs being classified as grid modernization.
As a result of the Order, Duke Energy Carolinas recorded a pretax charge of approximately $150 million to Impairment charges and Operation, maintenance and other on the Consolidated Statements of Operations. The charge is primarily related to the denial of a return on the Lee Nuclear Project and for previously recognized return impacted by the coal ash management penalty described above. On July 27, 2018, NCUC approved Duke Energy Carolinas' compliance filing. As a result, revised customer rates were effective on August 1, 2018.
On July 20, 2018, the North Carolina Attorney General filed a Notice of Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction issued by the NCUC. The Attorney General contends the commission’s order should be reversed and remanded, as it is in excess of the commission’s statutory authority; affected by errors of law; unsupported by competent, material and substantial evidence in view of the entire record as submitted; and arbitrary or capricious. The Sierra Club, North Carolina Sustainable Energy Association, North Carolina Justice Center, North Carolina Housing Coalition, Natural Resource Defense Council and Southern Alliance for Clean Energy have also filed Notices of Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction. On August 8, 2018, the Public Staff filed a Notice of Cross Appeal to the North Carolina Supreme Court from the June 22, 2018, Order Accepting Stipulation, Deciding Contested Issues and Requiring Revenue Reduction issued by the NCUC. The Public Staff contends the commission’s order should be reversed and remanded, as it is affected by errors of law, and is unsupported by substantial evidence with regard to the commission’s failure to consider substantial evidence of coal ash related environmental violations. On November 29, 2018, the North Carolina Attorney General's Office filed a motion with the North Carolina Supreme Court requesting the court consolidate the Duke Energy Carolinas and Duke Energy Progress appeals and enter an order adopting the parties’ proposed briefing schedule as set out in the filing. On November 29, 2018, the North Carolina Supreme Court adopted a schedule for briefing set forth in the motion to consolidate the Duke Energy Carolinas and Duke Energy Progress appeals. The Appellee response briefs are due July 29, 2019. Duke Energy Carolinas cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


2018 South Carolina Rate Case
On November 8, 2018, Duke Energy Carolinas filed an application with the PSCSC for a rate increase for retail customers of approximately $168 million, which represents an approximate 10.0 percent increase in retail revenues. The rate increase is driven by capital investments and environmental compliance progress made by Duke Energy Carolinas since its previous rate case, including the further implementation of Duke Energy Carolinas’ generation modernization program, which consists of retiring, replacing and upgrading generation plants, investments in customer service technologies and continued investments in base work to maintain its transmission and distribution systems. The request includes net tax benefits resulting from the Tax Act of $66 million to reflect the change in ongoing tax expense, primarily from the reduction in the federal income tax rate from 35 to 21 percent, and $46 million to return EDIT resulting from the federal tax rate change and deferred revenues since January 2018 related to the change and benefits of $17 million from a reduction in North Carolina state income taxes allocable to South Carolina.
Duke Energy Carolinas also requested approval of its proposed Grid Improvement Plan, adjustments to its Prepaid Advantage Program and a variety of accounting orders related to ongoing costs for environmental compliance, including recovery over a five-year period of $242 million of deferred coal ash related compliance costs, grid investments between rate changes, incremental depreciation expense, a result of new depreciation rates from the depreciation study approved in the 2017 North Carolina Rate Case above, and the balance of development costs associated with the cancellation of the Lee Nuclear Project. Finally, Duke Energy Carolinas sought approval to establish a reserve and accrual for end of life nuclear costs for nuclear fuel and materials and supplies. An evidentiary hearing is scheduled to begin on March 21, 2019, and a decision and revised customer rates are expected by mid-2019. Duke Energy Carolinas cannot predict the outcome of this matter.
FERC Formula Rate Matter
On July 31, 2017, PMPA filed a complaint with FERC alleging that Duke Energy Carolinas misapplied the formula rate under the PPA between the parties by including in its rates amortization expense associated with regulatory assets and recorded in a certain account without FERC approval. On February 15, 2018, FERC issued an order ruling in favor of PMPA and ordered Duke Energy Carolinas to refund to PMPA all amounts improperly collected under the PPA. Duke Energy Carolinas has issued to PMPA and similarly situated wholesale customers refunds of approximately $25 million. FERC also set the matter for settlement and hearing. PMPA and other customers filed a protest to Duke Energy Carolinas' refund report claiming that the refunds are inadequate in that (1) Duke Energy Carolinas invoked the limitations periods in the contracts to limit the time period for which the refunds were paid and the customers disagree that this limitation applies, and (2) Duke Energy Carolinas refunded only amounts recovered through a certain account and the customers have asserted that the order applies to all regulatory assets. On July 3, 2018, FERC issued an order accepting Duke Energy Carolinas' refund report and ruling that these two claims are outside the scope of FERC's February order. The settlement agreements and revised formula rates for all parties to the proceeding were filed on December 28, 2018. Duke Energy Carolinas cannot predict the outcome of this matter.
W.S. Lee CC
On April 9, 2014, the PSCSC granted Duke Energy Carolinas and NCEMC a CECPCN for the construction and operation of a 750-megawatt (MW) combined-cycle natural gas-fired generating plant at Duke Energy Carolinas' existing William States Lee Generating Station in Anderson, South Carolina. Duke Energy Carolinas began construction in July 2015 and its share of the cost to build the facility was approximately $650 million, including AFUDC. Approximately $600 million is being recovered through base rate or deferral filings in North Carolina and South Carolina. The remaining amount will be included in future rate filings. The project commenced commercial operation on April 5, 2018. NCEMC owns approximately 13 percent of the project.
Lee Nuclear Station
In December 2007, Duke Energy Carolinas applied to the NRC for COLs for two Westinghouse AP1000 reactors for the proposed William States Lee III Nuclear Station to be located at a site in Cherokee County, South Carolina. The NCUC and PSCSC concurred with the prudency of Duke Energy Carolinas incurring certain project development and preconstruction costs through several separately issued orders, although full cost recovery is not guaranteed. In December 2016, the NRC issued a COL for each reactor. Duke Energy Carolinas is not required to build the nuclear reactors as a result of the COLs being issued.
The Duke Energy Carolinas 2017 North Carolina Rate Case filing discussed above included a request to cancel the development of the Lee Nuclear project, recover incurred licensing and development costs and maintain the license issued by the NRC as an option for potential future development. The cancellation request was due to the Westinghouse bankruptcy filing and other market activity. The NCUC Order issued on June 22, 2018, approved the cancellation of the Lee Nuclear Project, allowed Duke Energy Carolinas to continue to maintain the COLs, provided for recovery of the North Carolina retail allocation of project development costs, including AFUDC accrued through December 31, 2017, over 12 years and disallowed any return on the unamortized balance during the 12-year recovery period.
Given the repeal of certain sections of the Base Load Review Act in South Carolina combined with the cancellation of the project, Duke Energy Carolinas determined that it was no longer probable it would be allowed a return on its share of project development costs attributable to South Carolina. As a result, Duke Energy Carolinas recorded a pretax impairment in the second quarter of 2018 of $29 million within Impairment charges on the Consolidated Statements of Operations and Comprehensive Income.
South Carolina Petition
On June 22, 2018, Duke Energy Carolinas filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred in connection with the addition of the W.S. Lee CC, the ongoing deployment of Duke Energy Carolinas new billing and Customer Information System and the addition of the Carolinas West Primary Distribution Control Center. This request totaling approximately $33 million was approved on July 25, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


Sale of Hydroelectric (Hydro) Plants
In May 2018, Duke Energy Carolinas entered an agreement for the sale of five hydro plants with a combined 18.7-MW generation capacity in the Western Carolinas region to Northbrook Energy. The completion of the transaction is subject to approval from FERC for the four FERC-licensed plants, as well as other state regulatory agencies and is contingent upon regulatory approval from the NCUC and PSCSC to defer the total estimated loss on the sale of approximately $40 million. On July 5, 2018, Duke Energy Carolinas filed with NCUC for approval of the sale of the five hydro plants to Northbrook, to transfer the CPCNs for the four North Carolina hydro plants and to establish a regulatory asset for the North Carolina retail portion of the difference between sales proceeds and net book value. On September 4, 2018, the Public Staff filed comments supporting the CPCN transfer with conditions. On September 18, 2018, Duke Energy Carolinas filed reply comments opposing the Public Staff’s proposed conditions. On November 29, 2018, the NCUC issued a procedural order and held an evidentiary hearing on this matter on February 5, 2019. On August 28, 2018, Duke Energy Carolinas filed with PSCSC its Application for Approval of Transfer and Sale of Hydroelectric Generation Facilities, Acceptance for Filing of a Power Purchase Agreement and an Accounting Order to Establish a Regulatory Asset. On September 10, 2018, the ORS provided a letter to the commission stating its position on the application and on September 18, 2018, Duke Energy Carolinas requested this matter be carried over to allow Duke Energy Carolinas time to discuss certain accounting issues with the ORS. On August 9, 2018, Duke Energy Carolinas and Northbrook filed a joint Application for Transfer of Licenses with the FERC. On December 27, 2018, the FERC issued its Order Approving Transfer of Licenses (“Order”) for the four FERC-licensed hydro plants. On January 18, 2019, Duke Energy Carolinas and Northbrook Carolina Hydro II, LLC requested a six-month extension of time to comply with the requirement of the Order that Northbrook submit to FERC certified copies of all instruments of conveyance and signed acceptance sheets within 60 days of the date of the Order, given that compliance by the deadline set in the Order is not possible because the conveyance of the projects is contingent on the receipt of state regulatory approvals, which are not anticipated to be issued by February 25, 2019.
If commission approvals are not received, Duke Energy Carolinas can cancel the sales agreement and retain the hydro facilities. If commission approvals are received, the closing is expected to occur during the second quarter of 2019. After closing, Duke Energy Carolinas will purchase all the capacity and energy generated by these facilities at the avoided cost for five years through power purchase agreements. Duke Energy Carolinas cannot predict the outcome of this matter.
Duke Energy Progress
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.
 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash$2,051
$1,975
 (h)(b)
AROs – nuclear and other429
359
  (c)
Accrued pension and OPEB542
430
  (k)
Retired generation facilities148
170
 X(b)
Storm cost deferrals(d)
571
150
 X(b)
Hedge costs deferrals54
64
  (b)
DSM/EE(e)
235
264
 (i)(i)
Vacation accrual41
42
  2019
Deferred fuel and purchased power397
130
 (f)2020
Nuclear deferral46
35
  2020
PISCC and deferred operating expenses36
38
 X2054
AMI67
75
  (b)
NCEMPA deferrals50
53
 (g)2042
Other147
74
  (b)
Total regulatory assets4,814
3,859
   
Less: current portion703
352
   
Total noncurrent regulatory assets$4,111
$3,507
   
Regulatory Liabilities(a)
     
Costs of removal$1,878
$2,122
 X(j)
Accrued pension and OPEB93

  (k)
Net regulatory liability related to income taxes(l)
1,863
1,854
  (b)
Deferred fuel and purchased power
1
 (f)2020
Other299
161
  (b)
Total regulatory liabilities4,133
4,138
   
Less: current portion178
139
   
Total noncurrent regulatory liabilities$3,955
$3,999
   



FINANCIAL STATEMENTSREGULATORY MATTERS


(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit.
(d)South Carolina storm costs are included in rate base.
(e)Included in rate base.
(f)Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina.
(g)South Carolina retail allocated costs are earning a return.
(h)Earns a debt and equity return on coal ash expenditures for North Carolina and South Carolina retail customers as permitted by various regulatory orders.
(i)Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.
(j)Recovered over the life of the associated assets.
(k)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
(l)Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate, both discussed in Note 23.
2017 North Carolina Rate Case
On June 1, 2017, Duke Energy Progress filed an application with the NCUC for a rate increase for retail customers of approximately $477 million, which represented an approximate 14.9 percent increase in annual base revenues. Subsequent to the filing, Duke Energy Progress adjusted the requested amount to $420 million, representing an approximate 13 percent increase. The rate increase is driven by capital investments subsequent to the previous base rate case, costs of complying with CCR regulations and the Coal Ash Act, costs relating to storm recovery, investments in customer service technologies and recovery of costs associated with renewable purchased power.
On December 16, 2016, Duke Energy Progress filed a petition with the NCUC requesting an accounting order to defer certain costs incurred in connection with response to Hurricane Matthew and other significant storms in 2016. The final estimate of incremental operation and maintenance and capital costs of $116 million was filed with the NCUC in September 2017. On July 10, 2017, the NCUC consolidated Duke Energy Progress' storm deferral request into the Duke Energy Progress rate case docket for decision.
On November 22, 2017, Duke Energy Progress and the Public Staff filed an Agreement and Stipulation of Partial Settlement resolving certain portions of the proceeding. Terms of the settlement included a return on equity of 9.9 percent and a capital structure of 52 percent equity and 48 percent debt. As a result of the settlement, in 2017 Duke Energy Progress recorded pretax charges totaling approximately $25 million to Impairment charges and Operation, maintenance and other on the Consolidated Statements of Operations, principally related to disallowances from rate base of certain projects at the Mayo and Sutton plants. On February 23, 2018, the NCUC issued an order approving the stipulation. The order also included the following material components not covered in the stipulation:
Recovery of the remaining $234 million of deferred coal ash basin closure costs over a five-year period with a return at Duke Energy Progress' WACC, excluding $10 million of retail deferred coal ash basin costs related to ash hauling at Duke Energy Progress' Asheville Plant;
Assessment of a $30 million management penalty ratably over a five-year period by reducing the annual recovery of the deferred coal ash costs;
Denial of Duke Energy Progress' request for recovery of future estimated ongoing annual coal ash costs of $129 million with approval to defer such costs with a return at Duke Energy Progress' WACC, to be considered for recovery in the next rate case; and
Approval to recover $51 million of the approximately $80 million deferred storm costs over a five-year period with amortization beginning in October 2016. The order did not allow the deferral of the associated capital costs or a return on the deferred balance during the deferral period.
The order also impacted certain amounts that were similarly recorded on Duke Energy Carolinas' Consolidated Balance Sheets. As a result of the order, Duke Energy Progress and Duke Energy Carolinas recorded pretax charges of $68 million and $14 million, respectively, in the first quarter of 2018 to Impairment charges, Operation, maintenance and other and Interest Expense on the Consolidated Statements of Operations. These charges primarily related to the coal ash basin disallowance and previously recognized return impacted by the coal ash management penalty and deferred storm cost adjustments. Revised customer rates became effective on March 16, 2018.
On May 15, 2018, the Public Staff filed a Notice of Cross Appeal to the North Carolina Supreme Court from the February 23, 2018, Order Accepting Stipulation, Deciding Contested Issues and Granting Partial Rate Increase issued by the NCUC. The Public Staff contend the commission’s order should be reversed and remanded, as it is affected by errors of law, and is unsupported by competent, material and substantial evidence in view of the entire record as submitted. The North Carolina Attorney General and Sierra Club have also filed Notices of Appeal to the North Carolina Supreme Court from the February 23, 2018, Order Accepting Stipulation, Deciding Contested Issues and Granting Partial Rate Increase. On November 29, 2018, the North Carolina Attorney General's Office filed a motion with the North Carolina Supreme Court requesting the court consolidate the Duke Energy Progress and Duke Energy Carolinas appeals and enter an order adopting the parties’ proposed briefing schedule as set out in the filing. On November 29, 2018, the North Carolina Supreme Court adopted a schedule for briefing set forth in the motion to consolidate the Duke Energy Progress and Duke Energy Carolinas appeals. The Appellee response briefs are due July 29, 2019. Duke Energy Progress cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


2016 South Carolina Rate Case
In December 2016, the PSCSC approved a rate case settlement agreement among the ORS, intervenors and Duke Energy Progress. Terms of the settlement agreement included an approximate $56 million increase in revenues over a two-year period. An increase of approximately $38 million in revenues was effective January 1, 2017, and an additional increase of approximately $19 million in revenues was effective January 1, 2018. Duke Energy Progress amortized approximately $19 million from the cost of removal reserve in 2017. Other settlement terms included a rate of return on equity of 10.1 percent, recovery of coal ash costs incurred from January 1, 2015, through June 30, 2016, over a 15‑year period and ongoing deferral of allocated ash basin closure costs from July 1, 2016, until the next base rate case. The settlement also provides that Duke Energy Progress will not seek an increase in rates in South Carolina to occur prior to 2019, with limited exceptions.
2018 South Carolina Rate Case
On November 8, 2018, Duke Energy Progress filed an application with the PSCSC for a rate increase for retail customers of approximately $59 million, which represents an approximate 10.3 percent increase in annual base revenues. The rate increase is driven by capital investments and environmental compliance progress made by Duke Energy Progress since its previous rate case, including the further implementation of Duke Energy Progress’ generation modernization program, which consists of retiring, replacing and upgrading generation plants, investments in customer service technologies and continued investments in base work to maintain its transmission and distribution systems. The request includes net tax benefits of $15 million consisting of a $12 million increase due to the expiration of EDITs related to reductions in North Carolina state income taxes allocable to South Carolina and decreases resulting from the Tax Act of $17 million to reflect the change in ongoing tax expense, primarily the reduction in the federal income tax rate from 35 to 21 percent, and $10 million to return EDIT resulting from the federal tax rate change and deferred revenues since January 2018 related to the change.
Duke Energy Progress also requested approval of its proposed Grid Improvement Plan, approval of a Prepaid Advantage Program and a variety of accounting orders related to ongoing costs for environmental compliance, including recovery over a five-year period of $51 million of deferred coal ash related compliance costs, AMI deployment, grid investments between rate changes and regulatory asset treatment related to the retirement of a generating plant located in Asheville, North Carolina. Finally, Duke Energy Progress sought approval to establish a reserve and accrual for end of life nuclear costs for materials and supplies and nuclear fuel. An evidentiary hearing is scheduled to begin on April 11, 2019, and a decision and revised customer rates are expected by mid-2019. Duke Energy Progress cannot predict the outcome of this matter.
Western Carolinas Modernization Plan
On November 4, 2015, Duke Energy Progress announced a Western Carolinas Modernization Plan, which included retirement of the existing Asheville coal-fired plant, the construction of two 280MW combined-cycle natural gas plants having dual-fuel capability, with the option to build a third natural gas simple cycle unit in 2023 based upon the outcome of initiatives to reduce the region's power demand. The plan also included upgrades to existing transmission lines and substations, installation of solar generation and a pilot battery storage project. These investments will be made within the next seven years. Duke Energy Progress is also working with the local natural gas distribution company to upgrade an existing natural gas pipeline to serve the natural gas plant.
On March 28, 2016, the NCUC issued an order approving a CPCN for the new combined-cycle natural gas plants, but denying the CPCN for the contingent simple cycle unit without prejudice to Duke Energy Progress to refile for approval in the future. On March 28, 2018, Duke Energy Progress filed an annual progress report for the construction of the combined-cycle plants with the NCUC, with an estimated cost of $893 million. Site preparation activities for the combined-cycle plants are complete and construction of these plants began in 2017, with an expected in-service date in late 2019.
On October 8, 2018, Duke Energy Progress filed an application with the NCUC for a CPCN to construct the Hot Springs Microgrid Solar and Battery Storage Facility. On November 30, 2018, the NCUC issued an order scheduling hearings, requiring filing of testimony, establishing discovery guidelines and requiring public notice. On February 7, 2019, Duke Energy Progress made a joint filing with the Public Staff, which accepted the Public Staff’s proposed conditions and requested that the NCUC cancel the evidentiary hearing. Duke Energy Progress cannot predict the outcome of this matter.
The carrying value of the 376-MW Asheville coal-fired plant, including associated ash basin closure costs, of $327 million and $385 million is included in Generation facilities to be retired, net on Duke Energy Progress' Consolidated Balance Sheets as of December 31, 2018, and 2017, respectively. Duke Energy Progress' request for a regulatory asset at the time of retirement with amortization over a 10-year period was approved by the NCUC on February 23, 2018.
Shearon Harris Nuclear Plant Expansion
In 2006, Duke Energy Progress selected a site at Harris to evaluate for possible future nuclear expansion. On February 19, 2008, Duke Energy Progress filed its COL application with the NRC for two Westinghouse AP1000 reactors at Harris, which the NRC docketed for review. On May 2, 2013, Duke Energy Progress filed a letter with the NRC requesting the NRC to suspend its review activities associated with the COL at the Harris site. The NCUC and PSCSC approved deferral of retail costs. Total deferred costs are approximately $43 million as of December 31, 2018, and are recorded in Regulatory assets on Duke Energy Progress’ Consolidated Balance Sheets. On November 17, 2016, the FERC approved Duke Energy Progress’ rate recovery request filing for the wholesale ratepayers’ share of the abandonment costs, including a debt-only return to be recovered through revised formula rates and amortized over a 15-year period beginning May 1, 2014. As part of the settlement agreement for the 2017 North Carolina Rate Case discussed above, Duke Energy Progress will amortize the regulatory asset over an eight-year period. NCUC approved the settlement on February 23, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


South Carolina Petitions
On June 22, 2018, Duke Energy Progress filed a petition with the PSCSC seeking an accounting order authorizing Duke Energy Progress to adopt new depreciation rates, effective March 16, 2018, that reflect the results of Duke Energy Progress’ most recent depreciation study. Also on June 22, 2018, Duke Energy Progress filed a petition with the PSCSC requesting an accounting order to defer certain costs incurred in connection with the deployment of AMI, the ongoing deployment of Duke Energy Progress' new billing and Customer Information System, new depreciation rates and costs incurred in connection with the return of certain excess deferred state income taxes from North Carolina. These requests totaling approximately $20 million were approved on July 25, 2018.
FERC Form 1 Reporting Matter
On October 18, 2017, Fayetteville Public Works Commission (FPWC) filed with FERC a complaint against Duke Energy Progress. In the complaint, FPWC alleges that Duke Energy Progress’ change in its method of reporting materials and supplies inventory on FERC Form 1 for 2015 constituted a change in accounting practice that Duke Energy Progress was not permitted to implement without first obtaining FERC approval. On April 23, 2018, FERC issued an order finding that Duke Energy Progress’ new reporting methodology was not proper and required Duke Energy Progress to revise its FERC Form 1s beginning in 2014 and to issue refunds to formula rate customers. Duke Energy Progress estimates that these refunds will total approximately $14 million. On May 23, 2018, Duke Energy Progress filed a request for rehearing alleging that FERC’s order is incorrect. Duke Energy Progress revised its FERC Form 1 filings in June 2018. On August 31, 2018, Duke Energy Progress filed with FERC a refund report memorializing its payment of refunds to FPWC. Duke Energy Progress cannot predict the outcome of this matter.
Tax Act
As ordered by the NCUC on October 5, 2018, Duke Energy Progress filed a proposal on October 25, 2018, to adjust rates to reflect the reduction in federal corporate income tax rate from 35 to 21 percent for taxable years beginning after December 31, 2017, as outlined in the Tax Act. Duke Energy Progress proposed that this rate decrement be effective for service rendered on and after December 1, 2018. On November 28, 2018, the NCUC approved the proposal to implement the change in the federal corporate income tax rate and effective December 1, 2018, Duke Energy Progress implemented the rate reduction. Also, as ordered by the NCUC on October 5, 2018, Duke Energy Progress shall continue to hold in a deferred regulatory liability account the difference between revenues billed under the prior federal corporate income tax rate and the federal corporate income tax rate resulting from the Tax Act for the period January 1, 2018 through November 30, 2018. The disposition of such regulatory liability may be considered in Duke Energy Progress' next general rate case proceeding or in three years, whichever is sooner. EDIT related to the corporate income tax rate reduction shall be held in a deferred tax regulatory liability account until they can be addressed for ratemaking purposes in the next general rate case proceeding or in three years, whichever is sooner.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Florida
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets.
 December 31, Earns/PaysRecovery/Refund
(in millions)2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
     
AROs – coal ash(c)
$10
$9
  (b)
AROs – nuclear and other(c)
172
296
  (b)
Accrued pension and OPEB(c)
532
476
 X(g)
Retired generation facilities(c)
219
216
 X(b)
Storm cost deferrals(c)(h)
382
376
 (e)2021
Nuclear asset securitized balance, net1,093
1,142
  2036
Hedge costs deferrals20
30
  2020
DSM/EE(c)
21
17
 X2023
Deferred fuel and purchased power(c)
203
219
 (f)2020
AMI(c)
60
75
 X2032
Other176
36
 (d)(b)
Total regulatory assets2,888
2,892
   
Less: current portion434
389
   
Total noncurrent regulatory assets$2,454
$2,503
   
Regulatory Liabilities(a)
     
Costs of removal(c)
$257
$415
 (d)(b)
Net regulatory liability related to income taxes(c)
847
948
  (b)
Accrued pension and OPEB56

 X(g)
Deferred fuel and purchased power(c)
16

 (f)2020
Other20
18
 (d)(b)
Total regulatory liabilities1,196
1,381
   
Less: current portion102
74
   
Total noncurrent regulatory liabilities$1,094
$1,307
   
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Certain costs earn a return.
(e)Earns a debt return/interest once collections begin.
(f)Earns commercial paper rate.
(g)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 22 for additional detail.
(h)Balance includes $165 million for Hurricane Michael. Duke Energy Florida expects to seek recovery of these costs in the first half of 2019.
Storm Restoration Cost Recovery
In September 2017, Duke Energy Florida’s service territory suffered significant damage from Hurricane Irma, resulting in approximately 1 million customers experiencing outages. In the fourth quarter of 2017, Duke Energy Florida also incurred preparation costs related to Hurricane Nate. On December 28, 2017, Duke Energy Florida filed a petition with the FPSC to recover incremental storm restoration costs for Hurricane Irma and Hurricane Nate and to replenish the storm reserve. On February 6, 2018, the FPSC approved a stipulation that would apply tax savings resulting from the Tax Act toward storm costs effective January 2018 in lieu of implementing a storm surcharge. Storm costs are currently expected to be fully recovered by approximately mid-2021. On May 31, 2018, Duke Energy Florida filed a petition for approval of actual storm restoration costs and associated recovery process related to Hurricane Irma and Hurricane Nate. The petition is seeking the approval for the recovery in the amount of $510 million in actual recoverable storm restoration costs, including the replenishment of Duke Energy Florida’s storm reserve of $132 million, and the process for recovering these recoverable storm costs. On August 20, 2018, the FPSC approved Duke Energy Florida's unopposed Motion for Continuance filed August 17, 2018, to allow for an evidentiary hearing in this matter. On January 28, 2019, Duke Energy Florida made a supplemental filing to reduce the total storm cost recovery from $510 million to $508 million. The commission has scheduled the hearing to begin on May 21, 2019. At December 31, 2018, Duke Energy Florida's Consolidated Balance Sheets included approximately $217 million of recoverable costs under the FPSC's storm rule in Regulatory assets within Current Assets and Other Noncurrent Assets related to storm recovery for Hurricane Irma and Hurricane Nate. Duke Energy Florida cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


In October 2018, Duke Energy Florida’s service territory suffered damage when Hurricane Michael made landfall as a strong Category 4 hurricane with maximum sustained winds of 155 mph. The storm caused catastrophic damage from wind and storm surge, particularly from Panama City Beach to Mexico Beach, resulting in widespread outages and significant damage to transmission and distribution facilities across the central Florida Panhandle. In response to Hurricane Michael, Duke Energy Florida restored service to approximately 72,000 customers. Duke Energy Florida incurred approximately $200 million of costs resulting from the hurricane restoration efforts. Approximately $35 million of the costs are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2018. The remaining $165 million of costs represent recoverable costs under the FPSC’s storm rule and Duke Energy Florida's Open Access Transmission Tariff formula rates and are included in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets as of December 31, 2018. Duke Energy Florida anticipates filing a petition with the FPSC in the first half of 2019 to recover these costs, consistent with the provisions in the 2017 Settlement. Duke Energy Florida cannot predict the outcome of this matter.
Tax Act
Pursuant to Duke Energy Florida's 2017 Settlement, on May 31, 2018, Duke Energy Florida filed a petition related to the Tax Act, which included revenue requirement impacts of annual tax savings of $134 million and estimated annual amortization of EDIT of $67 million for a total of $201 million. Of this amount, $50 million would be offset by accelerated depreciation of Crystal River 4 and 5 coal units and an estimated $151 million would be offset by Hurricane Irma storm cost recovery as explained in the Storm Restoration Cost Recovery section above. On December 27, 2018, Duke Energy Florida filed actual EDIT balances and amortization based on its 2017 filed tax return. This increased the revenue requirement impact of the amortization of EDIT by $4 million, from $67 million to $71 million. On January 8, 2019, the FPSC approved a joint motion by Duke Energy Florida and the Office of Public Counsel resolving all stipulated positions. As part of that stipulation, Duke Energy Florida will seek a Private Letter Ruling from the IRS on its treatment of COR as mostly protected by tax normalization rules. If the IRS rules that COR is not protected by tax normalization rules, then Duke Energy Florida will make a final adjustment to the amortization of EDIT and an adjustment to the storm recovery amount retroactive to January 2018. Duke Energy Florida cannot predict the outcome of this matter.
Citrus County CC
On October 2, 2014, the FPSC granted Duke Energy Florida a Determination of Need for the construction of a 1,640-MW combined-cycle natural gas plant in Citrus County, Florida. At that time, the estimated cost of the facility was $1.5 billion, including AFUDC. On May 5, 2015, the Florida Department of Environmental Protection approved Duke Energy Florida's Site Certification Application and construction began in October 2015. On July 10, 2018, the FPSC approved Duke Energy Florida's request to include the annual revenue requirement of $200 million for the new Citrus County combined-cycle units in base rates. The first 820-MW power block came on-line on October 26, 2018, and the rate increase for this unit was effective in December 2018. The second 820-MW power block came on-line November 24, 2018. The rate increase for the second unit was effective in January 2019. The ultimate cost of the facility is estimated to be $1.6 billion, and Duke Energy Florida recorded Impairment charges on Duke Energy’s Consolidated Statements of Operations of $60 million in the fourth quarter of 2018 for the overrun, which may change in light of recoveries from the EPC contractor. The plant began receiving natural gas from the Sabal Trail pipeline in August 2018. As a result of the combined-cycle natural gas plant coming on-line, Crystal River coal-fired units 1 and 2 were retired in December 2018. See Note 5 for additional information on Citrus.
Solar Base Rate Adjustment
On July 31, 2018, Duke Energy Florida petitioned the FPSC to include in base rates the revenue requirements for its first two solar generation projects, the Hamilton Project and the Columbia Project, as authorized by the 2017 Settlement. The Hamilton Project, which was placed into service on December 22, 2018, has an annual retail revenue requirement of $15 million and the increase was effective in January 2019. The Columbia Project has a projected annual revenue requirement of $14 million and a projected in-service date in early 2020; the associated rate increase would take place with the first month’s billing cycle after the Columbia Project goes into service. At its October 30, 2018, Agenda Conference, the FPSC approved the rate increase related to the Hamilton Project to go into effect beginning with the first billing cycle in January 2019 under its file and suspend authority. Rates are subject to true up pending the outcome of the final hearing, which is scheduled to take place on April 2, 2019. Duke Energy Florida cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Ohio
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets.
December 31, Earns/PaysRecovery/RefundDecember 31, Earns/PaysRecovery/Refund
(in millions)2017
2016
 a ReturnPeriod Ends2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
    
AROs - coal ash$17
$12
 X(b)
AROs – coal ash$20
$17
 X(b)
Accrued pension and OPEB139
135
 (g)146
139
 (g)
Net regulatory asset related to income taxes(c)

63
 (d)
Storm cost deferrals5
5
 (b)4
5
 2023
Hedge costs deferrals6
7
 (b)5
6
 (b)
DSM/EE18
6
 (f)(e)10
18
 (f)(e)
Grid modernization39
65
 X(e)31
39
 X(e)
Vacation accrual5
4
 20185
5
 2019
Deferred fuel and purchased power
5
 2

 2019
PISCC and deferred operating expenses(c)
19
20
 X208317
19
 X2083
Transmission expansion obligation50
71
 (e)43
50
 (e)
MGP91
99
 (b)99
91
 (b)
AMI6

 (b)46
6
 (b)
East Bend deferrals45
32
 X(b)47
45
 X(b)
Deferred pipeline integrity costs12
7
 X(b)14
12
 X(b)
Other42
26
 (b)75
42
 (b)
Total regulatory assets494
557
 564
494
 
Less: current portion49
37
 33
49
 
Total noncurrent regulatory assets$445
$520
 $531
$445
 
Regulatory Liabilities(a)
    
Costs of removal$189
$212
 (d)$126
$189
 (d)
Net regulatory liability related to income taxes688

 (b)678
688
 (b)
Accrued pension and OPEB16
19
 (g)18
16
 (g)
Deferred fuel and purchased power
6
 
Other34
20
 (b)75
34
 (b)
Total regulatory liabilities927
257
 897
927
 
Less: current portion36
21
 57
36
 
Total noncurrent regulatory liabilities$891
$236
 $840
$891
 
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Recovery over the life of the associated assets.
(e)Recovered via a rider mechanism.
(f)Includes incentives on DSM/EE investments.
(g)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.
Duke Energy Kentucky Rate Case
On September 1, 2017, Duke Energy Kentucky filed a rate case with the KPSC requesting an increase in electric base rates of approximately $49 million, which represents an approximate 15 percent increase on the average customer bill. The rate increase is driven by increased investment in utility plant, increased operations and maintenance expenses and recovery of regulatory assets. The application also includes implementation of the Environmental Surcharge Mechanism to recover environmental costs not included in base rates, requests to establish a Distribution Capital Investment Rider to recover incremental costs of specific programs, requests to establish a FERC Transmission Cost Reconciliation Rider to recover escalating transmission costs and modification to the Profit Sharing Mechanism to increase customers' share of proceeds from the benefits of owning generation and to mitigate shareholder risks associated with that generation. An evidentiary hearing is scheduled to begin on March 6, 2018.Duke Energy Kentucky anticipates that rates will go into effect in mid-April 2018. Duke Energy Kentucky cannot predict the outcome of this matter.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

2017 Electric Security Plan
On June 1, 2017, Duke Energy Ohio filed with the PUCO a request for a standard service offer in the form of an electric security plan (ESP). If approved byESP. On February 15, 2018, the procedural schedule was suspended to facilitate ongoing settlement discussions. On April 13, 2018, Duke Energy Ohio filed a Motion to consolidate this proceeding with several other cases currently pending before the PUCO, including, but not limited to, its Electric Base Rate Case. Additionally, on April 13, 2018, Duke Energy Ohio, along with certain intervenors, filed a Stipulation and Recommendation (Stipulation) with the PUCO resolving certain issues in this proceeding. The term of the ESP would be from June 1, 2018, to May 31, 2024. Terms of the ESP include2025, and includes continuation of market-based customer rates through competitive procurement processes for generation, continuation and expansion of existing rider mechanisms and proposed new rider mechanisms relating to regulatory mandates, costs incurred to enhance the customer experience and transform the grid and a service reliability rider for vegetation management. The Stipulation establishes a regulatory model for the next seven years via the approval of the ESP and continues the current model for procuring supply for non-shopping customers, including recovery mechanisms. On December 19, 2018, the PUCO approved the Stipulation without material modification. Several parties have filed applications for rehearing. On February 15, 2018,6, 2019, the procedural schedule was suspended to facilitate ongoing settlement discussions.PUCO granted the parties rehearing. Duke Energy Ohio cannot predict the outcome of this matter.
Woodsdale Station Fuel System Filing



FINANCIAL STATEMENTSREGULATORY MATTERS


Electric Base Rate Case
Duke Energy Ohio filed with the PUCO an electric distribution base rate case application and supporting testimony in March 2017. Duke Energy Ohio requested an estimated annual increase of approximately $15 million and a return on equity of 10.4 percent. The application also included requests to continue certain current riders and establish new riders. On June 9, 2015,September 26, 2017, the FERC ruledPUCO staff filed a report recommending a revenue decrease between approximately $18 million and $29 million and a return on equity between 9.22 percent and 10.24 percent. On April 13, 2018, Duke Energy Ohio filed a Motion to consolidate this proceeding with several other cases pending before the PUCO. On April 13, 2018, Duke Energy Ohio, along with certain intervenors, filed the Stipulation with the PUCO resolving numerous issues including those in favor of PJM Interconnection, LLC (PJM) on a revised Tariff and Reliability Assurance Agreement including implementation of a Capacity Performance (CP) proposal and to amend sectionsthis base rate proceeding. Major components of the Operating AgreementStipulation related to generation non-performance. The CP proposal includes performance-based penalties for non-compliance.the base distribution rate case include a $19 million decrease in annual base distribution revenue with a return on equity unchanged from the current rate of 9.84 percent based upon a capital structure of 50.75 percent equity and 49.25 percent debt. Upon approval of new rates, Duke Energy Kentucky is a Fixed Resource Requirement (FRR) entity,Ohio's rider for recovering its initial SmartGrid implementation ends as these costs will be recovered through base rates. The Stipulation also renews 14 existing riders, some of which were included in the company's ESP, and therefore is subjectadds two new riders including the Enhanced Service Reliability Rider to recover vegetation management costs not included in base rates, up to $10 million per year (operation and maintenance only) and the PowerForward Rider to recover costs incurred to enhance the customer experience and further transform the grid (operation and maintenance and capital). In addition to the compliance standards through its FRR plans. A partial CP obligation will applychanges in revenue attributable to the Stipulation, Duke Energy Kentucky inOhio’s capital-related riders, including the delivery yearDistribution Capital Investments Rider, began to reflect the lower federal income tax rate associated with the Tax Act with updates to customers’ bills beginning JuneApril 1, 2018. This change reduces electric revenue by approximately $20 million on an annualized basis. On December 19, 2018, the PUCO approved the Stipulation without material modification. New base rates were implemented effective January 2, 2019. Several parties have filed applications for rehearing. On February 6, 2019, with full compliance beginning June 1, 2020.the PUCO granted the parties rehearing. Duke Energy Kentucky has developed strategies for CP compliance investments. On December 21, 2017,Ohio cannot predict the KPSC issued an order approving Duke Energy Kentucky's request for a CPCN to construct an ultra-low sulfur diesel backup fuel system for the Woodsdale Station. The backup fuel system is projected to cost approximately $55 million and is anticipated to be in service prior to the CP compliance deadlineoutcome of April 2019.this matter.
Ohio Valley Electric Corporation
On March 31, 2017, Duke Energy Ohio filed for approval to adjust its existing price stabilization rider (Rider PSR), which is currently set at zero dollars, to pass through net costs related to its contractual entitlement to capacity and energy from the generating assets owned by OVEC. The filing seeks to adjust Rider PSR for OVEC costs subsequent to April 1, 2017. Duke Energy Ohio is seekingsought deferral authority for net costs incurred from April 1, 2017, until the new rates under Rider PSR are put into effect. Various intervenors have filed motions to dismiss or stay the proceeding andOn April 13, 2018, Duke Energy Ohio has opposed these filings.filed a Motion to consolidate this proceeding with several other cases currently pending before the PUCO. Also on April 13, 2018, Duke Energy Ohio, along with certain intervenors, filed a Stipulation with the PUCO resolving numerous issues including those related to Rider PSR. The Stipulation activates Rider PSR for recovery of net costs incurred from January 1, 2018 through May 2025. On December 19, 2018, the PUCO approved the Stipulation without material modification. Several parties have filed applications for rehearing. On February 6, 2019, the PUCO granted the parties rehearing. Duke Energy Ohio cannot predict the outcome of this matter. See Note 1317 for additional discussion of Duke Energy Ohio's ownership interest in OVEC.
Tax Act – Ohio
On July 25, 2018, Duke Energy Ohio filed an application to establish a new rider to implement the benefits of the Tax Act for electric distribution customers. Duke Energy Ohio requested commission approval to implement the rider effective October 1, 2018, as a credit to all distribution customers based upon a percent reduction to Duke Energy Ohio’s distribution rates. The new rider will flow through to customers the benefit of the lower statutory federal tax rate from 35 to 21 percent since January 1, 2018, all future benefits of the lower tax rates and a full refund of deferred income taxes collected at the higher tax rates in prior years. Deferred income taxes subject to normalization rules will be refunded consistent with federal law and deferred income taxes not subject to normalization rules will be refunded over a 10-year period. Duke Energy Ohio's transmission rates reflect lower federal income tax but guidance from FERC on amortization of both protected and unprotected transmission-related EDITs is still pending. On October 24, 2018, the PUCO issued a Finding and Order that, among other things, directed all utilities over which the commission has rate-making authority to file an application to pass the benefits of the Tax Act to customers by January 1, 2019, unless otherwise exempted or directed by the PUCO. Duke Energy Ohio's July 25, 2018, filing for electric distribution operations is consistent with the commission's October 24, 2018, Finding and Order and no further action is needed. On February 20, 2019, the PUCO approved the application without material modification. Rates will be effective March 1, 2019. On December 21, 2018, Duke Energy Ohio filed an application to change its base rates and establish a new rider to implement the benefits of the Tax Act for natural gas customers. Duke Energy Ohio requested commission approval to implement the changes and rider effective April 1, 2019. The new rider will flow through to customers the benefit of the lower statutory federal tax rate from 35 to 21 percent since January 1, 2018, all future benefits of the lower tax rates and a full refund of deferred income taxes collected at the higher tax rates in prior years. Deferred income taxes subject to normalization rules will be refunded consistent with federal law and deferred income taxes not subject to normalization rules will be refunded over a 10-year period. The PUCO has not yet ruled on the application for changes for natural gas customers. Duke Energy Ohio cannot predict the outcome of this matter.
East Bend Coal Ash Basin Filing
On December 2, 2016, Duke Energy Kentucky filed with the KPSC a request for a CPCN for construction projects necessary to close and repurpose an ash basin at the East Bend facility as a result of current and proposed EPA regulations. Duke Energy Kentucky estimated a total cost of approximately $93 million in the filing and expects in-service date by the first quarter of 2021. On June 6, 2017, the KPSC approved the CPCN request.
Electric Base Rate Case
Duke Energy Ohio filed with the PUCO an electric distribution base rate case application and supporting testimony in March 2017. Duke Energy Ohio requested an estimated annual increase of approximately $15 million and a return on equity of 10.4 percent. The application also includes requests to continue certain current riders and establish new riders. On September 26, 2017, the PUCO staff filed a report recommending a revenue decrease between approximately $18 million and $29 million and a return on equity between 9.22 percent and 10.24 percent. On February 15, 2018, the procedural schedule was suspended to facilitate ongoing settlement discussions. Duke Energy Ohio expects rates will go into effect the second quarter of 2018. Duke Energy Ohio cannot predict the outcome of this matter.
Natural Gas Pipeline Extension
Duke Energy Ohio is proposing to install a new natural gas pipeline in its Ohio service territory to increase system reliability and enable the retirement of older infrastructure. On January 20, 2017, Duke Energy Ohio filed an amended application with the Ohio Power Siting Board for approval of one of two proposed routes. A public hearing was held on June 15, 2017, and an adjudicatory hearing was scheduled to begin September 11, 2017. On August 24, 2017, an administrative law judge (ALJ) granted a request made by Duke Energy Ohio to delay the procedural schedule while it works through various issues related to the pipeline route. If approved, construction of the pipeline extension is expected to be completed before the 2020/2021 winter season. The proposed project involves the installation of a natural gas line and is estimated to cost approximately $110 million, excluding AFUDC.
Advanced Metering Infrastructure
On April 25, 2016, Duke Energy Kentucky filed with the KPSC an application for approval of a CPCN for the construction of advanced metering infrastructure. Duke Energy Kentucky estimates the $49 million project will take two years to complete. Duke Energy Kentucky also requested approval to establish a regulatory asset for the remaining book value of existing meter equipment and inventory to be replaced. Duke Energy Kentucky and the Kentucky attorney general entered into a stipulation to settle matters related to the application. On May 25, 2017, the KPSC issued an order to approve the stipulation with certain modifications. On June 1, 2017, Duke Energy Kentucky filed its acceptance of the modifications. The deployment of AMI meters began in third quarter 2017 and is expected to be completed in early 2019. Duke Energy Ohio has approximately $6 million included in Regulatory assets on its Consolidated Balance Sheets at December 31, 2017, for the book value of existing meter equipment.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Accelerated Natural Gas Service Line Replacement Rider
On January 20, 2015, Duke Energy Ohio filed an application for approval of an accelerated natural gas service line replacement program (ASRP). Under the ASRP, Duke Energy Ohio proposed to replace certain natural gas service lines on an accelerated basis over a 10-year period. Duke Energy Ohio also proposed to complete preliminary survey and investigation work related to natural gas service lines that are customer owned and for which it does not have valid records and, further, to relocate interior natural gas meters to suitable exterior locations where such relocation can be accomplished. Duke Energy Ohio's projected total capital and operations and maintenance expenditures under the ASRP were approximately $240 million. The filing also sought approval of a rider mechanism (Rider ASRP) to recover related expenditures. Duke Energy Ohio proposed to update Rider ASRP on an annual basis. Intervenors opposed the ASRP, primarily because they believe the program is neither required nor necessary under federal pipeline regulation. On October 26, 2016, the PUCO issued an order denying the proposed ASRP. Duke Energy Ohio's application for rehearing of the PUCO decision was denied on May 17, 2017.
Energy Efficiency Cost Recovery
On March 28, 2014, Duke Energy Ohio filed an application for recovery of program costs, lost distribution revenue and performance incentives related to its energy efficiency and peak demand reduction programs. These programs are undertaken to comply with environmental mandates set forth in Ohio law. The PUCO approved Duke Energy Ohio’s application but found that Duke Energy Ohio was not permitted to use banked energy savings from previous years in order to calculate the amount of allowed incentive. This conclusion represented a change to the cost recovery mechanism that had been agreed upon by intervenors and approved by the PUCO in previous cases. The PUCO granted the applications for rehearing filed by Duke Energy Ohio and an intervenor. On January 6, 2016, Duke Energy Ohio and the PUCO Staff entered into a stipulation, pending the PUCO's approval, to resolve issues related to performance incentives and the PUCO Staff audit of 2013 costs, among other issues. In December 2015, based upon the stipulation, Duke Energy Ohio re-established approximately $20 million of the revenues that had been previously reversed. On October 26, 2016, the PUCO issued an order approving the stipulation without modification. In December 2016, the PUCO granted the intervenors request for rehearing for the purpose of further review. Duke Energy Ohio cannot predict the outcome of this matter.



FINANCIAL STATEMENTSREGULATORY MATTERS


On June 15, 2016, Duke Energy Ohio filed an application for approval of a three-year energy efficiency and peak demand reduction portfolio of programs. A stipulation and modified stipulation were filed on December 22, 2016, and January 27, 2017, respectively. Under the terms of the stipulations, which included support for deferral authority of all costs and a cap on shared savings incentives, Duke Energy Ohio has offered its energy efficiency and peak demand reduction programs throughout 2017. On February 3, 2017, Duke Energy Ohio filed for deferral authority of its costs incurred in 2017 in respect of its proposed energy efficiency and peak demand reduction portfolio. On September 27, 2017, the PUCO issued an order approving a modified stipulation. The modifications impose an annual cap of approximately $38 million on program costs and shared savings incentives combined, but allowed for Duke Energy Ohio to file for a waiver of costs in excess of the cap in 2017. The PUCO approved the waiver request for 2017 up to a total cost of $56 million. On November 21, 2017, the PUCO granted Duke Energy Ohio's and intervenor's applications for rehearing of the September 27, 2017, order. On January 10, 2018, the PUCO denied the Ohio Consumers' Counsel’s application for rehearing of the PUCO order granting Duke Energy Ohio's waiver request.request; however, a decision on Duke Energy Ohio's application for rehearing remains pending. Duke Energy Ohio cannot predict the outcome of this matter.
2014 Electric Security Plan
In April 2015, the PUCO modified and approved Duke Energy Ohio's proposed electric security plan (ESP),ESP, with a three-year term and an effective date of June 1, 2015. The PUCO approved a competitive procurement process for SSO load, a distribution capital investment rider (Rider DCI) and a tracking mechanism for incremental distribution expenses caused by major storms. The PUCO also approved a placeholder tariff for a price stabilization rider, but denied Duke Energy Ohio's specific request to include Duke Energy Ohio's entitlement to generation from OVEC in the rider at this time; however, the order allows Duke Energy Ohio to submit additional information to request recovery in the future. On May 4, 2015, Duke Energy Ohio filed an application for rehearing requesting the PUCO to modify or amend certain aspects of the order. On May 28, 2015, the PUCO granted all applications for rehearing filed in the case for future consideration. On March 21, 2018, the PUCO issued an order denying Duke Energy Ohio's issues on rehearing. On April 20, 2018, Duke Energy Ohio filed a second application for rehearing based upon the commission’s March 21, 2018, Order. On May 16, 2018, the commission issued its third Entry on Rehearing granting in part, and denying in part, Duke Energy Ohio’s rehearing request.
On March 9, 2018, Duke Energy Ohio filed a motion to extend its then-current ESP, including all terms and conditions thereof, pending approval of a new ESP. On May 30, 2018, the PUCO granted the request, with modification. Specifically, the PUCO did not extend the cap applicable to Rider DCI beyond July 31, 2018. Duke Energy Ohio sought rehearing of this finding. On July 25, 2018, the PUCO granted the request and allowed a continuing cap on recovery under Rider DCI. On August 24, 2018, OMA and OCC filed an Application for Rehearing of the commission's decision. Duke Energy Ohio filed a Memorandum Contra OCC's request for rehearing of the commission's continuation of Rider DCI on September 4, 2018. On September 19, 2018, the PUCO issued an Order granting rehearing on the matter for further consideration. Duke Energy Ohio cannot predict the outcome of the appeals in this matter.
On May 21, 2018, the Ohio Manufacturers' Association (OMA) filed a notice of appeal of PUCO's approval of Duke Energy Ohio’s ESP with the Ohio Supreme Court, challenging PUCO's approval of Duke Energy Ohio’s Price Stability Rider as a placeholder and its Rider DCI to recover incremental revenue requirement for distribution capital since Duke Energy Ohio’s last base rate case. On July 16, 2018, the Office of the Ohio Consumers' Counsel (OCC) filed its own appeal of Duke Energy Ohio’s ESP with the Ohio Supreme Court raising similar issues to that of the OMA. Duke Energy Ohio filed a Motion to Intervene in the two Ohio Supreme Court appeals. OMA's Supreme Court brief was filed on August 20, 2018. PUCO submitted its brief on October 26, 2018, and Duke Energy Ohio filed its brief on October 29, 2018. The OCC’s Supreme Court brief was filed on October 15, 2018. Duke Energy Ohio filed its brief on December 20, 2018. The PUCO submitted its brief on December 21, 2018. Duke Energy Ohio cannot predict the outcome of this matter.
Natural Gas Pipeline Extension
Duke Energy Ohio is proposing to install a new natural gas pipeline (the Central Corridor Project) in its Ohio service territory to increase system reliability and enable the retirement of older infrastructure. Duke Energy Ohio currently estimates the pipeline development costs and construction activities will range from $163 million to $245 million in direct costs (excluding overheads and AFUDC). On January 20, 2017, Duke Energy Ohio filed an amended application with the Ohio Power Siting Board (OPSB) for approval of one of two proposed routes. A public hearing was held on June 15, 2017. In April 2018, Duke Energy Ohio filed a motion with OPSB to establish a procedural schedule and filed supplemental information supporting its application. On December 18, 2018, the OPSB established a procedural schedule that includes a local public hearing on March 21, 2019, and an evidentiary hearing starting on April 9, 2019. If approved, construction of the pipeline extension is expected to be completed before the 2021/2022 winter season. Duke Energy Ohio cannot predict the outcome of this matter.
2012 Natural Gas Rate Case/MGP Cost Recovery
On November 13, 2013, the PUCO issued an order approving a settlement of Duke Energy Ohio’s natural gas base rate case and authorizing the recovery of costs incurred between 2008 and 2012 for environmental investigation and remediation of two former MGP sites. The PUCO order also authorized Duke Energy Ohio to continue deferring MGP environmental investigation and remediation costs incurred subsequent to 2012 and to submit annual filings to adjust the MGP rider for future costs. Intervening parties appealed this decision to the Ohio Supreme Court and on June 29, 2017, the Ohio Supreme Court issued its decision affirming the PUCO order. Appellants filed a request for reconsideration, which was denied on September 27, 2017. This matter is now final.
The PUCO order also contained conditional deadlines for completing the MGP environmental investigation and remediation costs at the MGP sites. For the property known as the East End site, the PUCO order established a deadline of December 31, 2016, which was subsequently extended to December 31, 2019. In January 2017, intervening parties filed for rehearing of the PUCO's decision. On February 8, 2017, the PUCO denied the rehearing request. As of December 31, 2017,2018, Duke Energy Ohio had approximately $35$24 million included in Regulatory assets on the Consolidated Balance Sheets for future remediation costs expected to be incurred at the East End site.site and approximately $23 million for future remediation costs expected to be incurred at the West End site included in Regulatory assets within Other Noncurrent Assets on the Consolidated Balance Sheets.



FINANCIAL STATEMENTSREGULATORY MATTERS


Duke Energy Kentucky Electric Rate Case
On September 1, 2017, Duke Energy Kentucky filed a rate case with the KPSC requesting an increase in electric base rates of approximately $49 million, which represents an approximate 15 percent increase on the average customer bill. Subsequent to the filing, Duke Energy Kentucky adjusted the requested amount to $30.1 million, in part to reflect the benefits of the Tax Act, representing an approximate 9 percent increase on the average customer bill. The rate increase was driven by increased investment in utility plant, increased operations and maintenance expenses and recovery of regulatory assets. The application also includes requests to implement an Environmental Surcharge Mechanism to recover environmental costs not recovered in base rates, to establish a Distribution Capital Investment Rider to recover incremental costs of specific programs, to establish a FERC Transmission Cost Reconciliation Rider to recover escalating transmission costs and to modify existing Profit Sharing Mechanism to increase customers' share of proceeds from the benefits of owning generation and to mitigate shareholder risks associated with that generation. An evidentiary hearing concluded on March 8, 2018, and the KPSC issued an order on April 13, 2018. Major components of the Order include approval of an $8 million increase in base rates with a return on equity at 9.725 percent based upon a capital structure of 49 percent equity on a total allocable capitalization of approximately $650 million. The Order approved the Environmental Surcharge Mechanism Rider and in June 2018 recovery began of capital-related environmental costs, including costs related to ash and ash disposal, and environmental operation and maintenance expenses formerly recovered in base rates, including expenses for environmental reagents and emission allowances. The incremental revenue from this rider will be approximately $13 million on an annualized basis. The order settles all issues associated with the Tax Act as it relates to the electric business by lowering the income tax component of the revenue requirement and refunding protected EDIT under allowable normalization rules and unprotected EDIT over 10 years. The Order denied requests to implement riders for certain transmission costs and distribution capital investments. Duke Energy Kentucky implemented new base rates on May 1, 2018. On May 3, 2018, Duke Energy Kentucky filed an application for rehearing on certain aspects of the order; on May 23, 2018, the KPSC granted a rehearing. On October 2, 2018, the KPSC issued its rehearing order correcting certain findings in its initial order and making additional changes that are immaterial to the company's earnings.
Duke Energy Kentucky Natural Gas Base Rate Case
On August 31, 2018, Duke Energy Kentucky filed an application with the KPSC requesting an increase in natural gas base rates of approximately $11 million, an approximate 11.1 percent average increase across all customer classes. The increase is net of approximately $5 million in annual savings as a result of the Tax Act. The drivers for this case are capital invested since Duke Energy Kentucky’s last rate case in 2009. Duke Energy Kentucky is also seeking implementation of a Weather Normalization Adjustment Mechanism, amortization of regulatory assets and to implement the impacts of the Tax Act, prospectively. On January 30, 2019, Duke Energy Kentucky entered into a settlement agreement with the Attorney General of Kentucky, the only intervenor in the case, which if approved would resolve the matter. The settlement provides for an approximate $7 million increase and approval of the proposed Weather Normalization Mechanism. A hearing was held on February 5, 2019. A ruling is expected in late first quarter 2019. Duke Energy Kentucky cannot predict the outcome of this matter.
FERC 494 Refund of Regional Transmission Enhancement Projects
FERC Order No. 494 Settlement Agreement (FERC 494 Settlement Agreement) was entered into by most of the PJM transmission owners, including Duke Energy Ohio and Duke Energy Kentucky, and the PJM state regulatory commissions approximately two years ago and was planned to be effective on January 1, 2016; however, it was not approved by FERC until May 31, 2018. The FERC 494 Settlement Agreement was due to the Seventh Circuit Court of Appeals finding that FERC had failed to adequately justify the costs that the customers in the western part of PJM were being charged for high voltage transmission projects, or Regional Transmission Expansion Plan (RTEP) projects (500 kV and above) built in the east. These costs were being allocated to all PJM customers on a load-ratio share basis but the court determined that these costs were not justifiable to customers in the west, including Duke Energy Ohio and Duke Energy Kentucky, that did not benefit from the RTEP projects. Costs for the periods 2012 through 2015 are expected to be refunded to Duke Energy Ohio and Duke Energy Kentucky on a monthly basis through December 2025. The refund amount for similar costs incurred beginning in 2016 through June 30, 2018, prior to the change in cost allocation by PJM was determined in the third quarter of 2018 and these amounts will be refunded over a 12-month period beginning in July 2018. These refunds, totaling approximately $47 million for Duke Energy Ohio and Duke Energy Kentucky, have been recorded to Operation, maintenance and other on the Consolidated Statements of Operations for the year ended December 31, 2018.
Regional Transmission Organization Realignment
Duke Energy Ohio, including Duke Energy Kentucky, transferred control of its transmission assets from MISO to PJM, Interconnection, LLC (PJM), effective December 31, 2011. The PUCO approved a settlement related to Duke Energy Ohio’s recovery of certain costs of the Regional Transmission Organization (RTO)RTO realignment via a non-bypassable rider. Duke Energy Ohio is allowed to recover all MISO Transmission Expansion Planning (MTEP) costs, including but not limited to Multi Value Project (MVP)MTEP costs directly or indirectly charged to Ohio customers. Duke Energy Ohio also agreed to vigorously defend against any charges for MVP projects from MISO. The KPSC also approved a request to effect the RTO realignment, subject to a commitment not to seek double recovery in a future rate case of the transmission expansion fees that may be charged by MISO and PJM in the same period or overlapping periods.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table provides a reconciliation of the beginning and ending balance of Duke Energy Ohio’s recorded liability for its exit obligation and share of MTEP costs excluding MVP, recorded in Other within Other in Current liabilitiesLiabilities and Other in Other Noncurrent Liabilities on the Consolidated Balance Sheets. The retail portions of MTEP costs billed by MISO are recovered by Duke Energy Ohio through a non-bypassable rider. As of December 31, 2018, and 2017, $43 million and $50 million, and 2016, $50 million and $71 millionrespectively, are recorded in Regulatory assets on Duke Energy Ohio's Consolidated Balance Sheets, respectively.Sheets.
  Provisions/
 Cash
    Provisions/
 Cash
  
(in millions)December 31, 2016
 Adjustments
 Reductions
 December 31, 2017
December 31, 2017
 Adjustments
 Reductions
 December 31, 2018
Duke Energy Ohio$90
 $(20) $(4) $66
$66
 $(4) $(4) $58
MVP. MISO approved 17 MVP proposals prior to Duke Energy Ohio’s exit from MISO on December 31, 2011. Construction of these projects is expected to continue through 2020. Costs of these projects, including operating and maintenance costs, property and income taxes, depreciation and an allowed return, are allocated and billed to MISO transmission owners.

On December 29, 2011, MISO filed a tariff with the FERC providing for the allocation of MVP costs to a withdrawing owner based on monthly energy usage. The FERC set for hearing (i) whether MISO’s proposed cost allocation methodology to transmission owners who withdrew from MISO prior to January 1, 2012, is consistent with the tariff at the time of their withdrawal from MISO and, (ii) if not, what the amount of and methodology for calculating any MVP cost responsibility should be. In 2012, MISO estimated Duke Energy Ohio’s MVP obligation over the period from 2012 to 2071 at $2.7 billion, on an undiscounted basis. On July 16, 2013, a FERC Administrative Law Judge (ALJ) issued an initial decision. Under this initial decision, Duke Energy Ohio would be liable for MVP costs. Duke Energy Ohio filed exceptions to the initial decision, requesting FERC to overturn the ALJ’s decision.
On October 29, 2015, the FERC issued an order reversing the ALJ's decision. The FERC ruled the cost allocation methodology is not consistent with the MISO tariff and that Duke Energy Ohio has no liability for MVP costs after its withdrawal from MISO. On May 19, 2016, the FERC denied the request for rehearing filed by MISO and the MISO Transmission Owners. On July 15, 2016, the MISO Transmission Owners filed a petition for review with the U.S. Court of Appeals for the Sixth Circuit. On June 21, 2017, a three-judge panel affirmed FERC's 2015 decision holding that Duke Energy Ohio has no liability for the cost of the MVP projects constructed after Duke Energy Ohio's withdrawal from MISO. MISO did not file further petitions for review and this matter is now final.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Duke Energy Indiana
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets.
December 31, Earns/PaysRecovery/RefundDecember 31, Earns/PaysRecovery/Refund
(in millions)2017
2016
 a ReturnPeriod Ends2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
    
AROs - coal ash$380
$276
 (b)
AROs – coal ash$450
$380
 (b)
Accrued pension and OPEB197
222
 (g)222
197
 (f)
Retired generation facilities(c)
65
73
 X202557
65
 X2026
Net regulatory asset related to income taxes
119
 (d)
Hedge costs deferrals25
26
 (b)24
25
 (b)
DSM/EE21

 (e)14
21
 (e)
Vacation accrual11
10
 201811
11
 2019
Deferred fuel and purchased power18
40
 201840
18
 2019
PISCC and deferred operating expenses(c)
274
281
 X(b)233
274
 X(b)
Gasification services agreement buyout(f)

8
 
AMI(c)
21
46
 X(b)18
21
 X(b)
Other131
121
 (b)88
131
 (b)
Total regulatory assets1,143
1,222
 1,157
1,143
 
Less: current portion165
149
 175
165
 
Total noncurrent regulatory assets$978
$1,073
 $982
$978
 
Regulatory Liabilities(a)
    
Costs of removal$644
$660
 (d)$628
$644
 (d)
Net regulatory liability related to income taxes998

 (b)1,009
998
 (b)
Amounts to be refunded to customers10
45
 20181
10
 2019
Accrued pension and OPEB64
72
 (g)67
64
 (f)
Other31
11
 (b)42
31
 (b)
Total regulatory liabilities1,747
788
 1,747
1,747
 
Less: current portion24
40
 25
24
 
Total noncurrent regulatory liabilities$1,723
$748
 $1,722
$1,723
 
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Recovery over the life of the associated assets.
(e)Includes incentives on DSM/EE investments and is recovered through a tracker mechanism over a two-year period.
(f)The IURC authorized Duke Energy Indiana to recover costs incurred to buy out a gasification services agreement, including carrying costs through 2017.
(g)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.
Coal Combustion Residual PlanFERC Transmission Return on Equity Complaint
On March 17, 2016,Customer groups have filed with the FERC complaints against Midcontinent Independent System Operator, Inc. (MISO) and its transmission-owning members, including Duke Energy Indiana, alleging, among other things, that the current base rate of return on equity earned by MISO transmission owners of 12.38 percent is unjust and unreasonable. The complaints claim, among other things, that the current base rate of return on equity earned by MISO transmission owners should be reduced to 8.67 percent. On January 5, 2015, the FERC issued an order accepting the MISO transmission owners' adder of 0.50 percent to the base rate of return on equity based on participation in an RTO subject to it being applied to a return on equity that is shown to be just and reasonable in the pending return on equity complaints. On December 22, 2015, the presiding FERC ALJ in the first complaint issued an Initial Decision in which the base rate of return on equity was set at 10.32 percent. On September 28, 2016, the Initial Decision in the first complaint was affirmed by FERC, but is subject to rehearing requests. On June 30, 2016, the presiding FERC ALJ in the second complaint issued an Initial Decision setting the base rate of return on equity at 9.70 percent. The Initial Decision in the second complaint is pending FERC review. On April 14, 2017, the U.S. Court of Appeals for the District of Columbia Circuit, in Emera Maine v. FERC, reversed and remanded certain aspects of the methodology employed by FERC to establish rates of return on equity. On October 16, 2018, FERC issued an order in response to the Emera remand proceeding proposing a new method for determining whether an existing return on equity is unjust and unreasonable, and a new process for determining a just and reasonable return on equity. On November 14, 2018, FERC directed parties to the MISO complaints to file briefs on how the new process for determining return on equity proposed in the Emera proceeding should be applied to the complaints involving the MISO transmission owners’ return on equity. Initial briefs were filed with the IURC a request for approval of its first group of federally mandated CCR rule compliance projects (Phase I CCR Compliance Projects) to comply with the EPA's CCR rule. The projects in this Phase I filing are CCR compliance projects, including the conversion of Cayugaon February 13, 2019, and Gibson stations to dry bottom ash handling and related water treatment.reply briefs will be due April 10, 2019. Duke Energy Indiana requested timely recoverycurrently believes these matters will not have a material impact on its results of approximately $380 million in retail capital costs, including AFUDC,operations, cash flows and recovery of incremental operating and maintenance costs underfinancial position.



FINANCIAL STATEMENTSREGULATORY MATTERS


Benton County Wind Farm Dispute
On December 16, 2013, BCWF filed a federal mandate tracker that provides for timely recovery of 80 percent of such costs and deferral with carrying costs of 20 percent of such costs for recovery in a subsequent retail base rate case. On January 24, 2017,lawsuit against Duke Energy Indiana seeking damages for past generation losses alleging Duke Energy Indiana violated its obligations under a 2006 PPA by refusing to offer electricity to the market at negative prices. Damage claims continue to increase during times that BCWF is not dispatched. Under 2013 revised MISO market rules, Duke Energy Indiana is required to make a price offer to MISO for the power it proposes to sell into MISO markets and various intervenors filedMISO determines whether BCWF is dispatched. Because market prices would have been negative due to increased market participation, Duke Energy Indiana determined it would not bid at negative prices in order to balance customer needs against BCWF's need to run. BCWF contends Duke Energy Indiana must bid at the lowest negative price to ensure dispatch, while Duke Energy Indiana contends it is not obligated to bid at any particular price, that it cannot ensure dispatch with any bid and that it has reasonably balanced the parties' interests. On July 6, 2015, the U.S. District Court for the Southern District of Indiana entered judgment against BCWF on all claims. BCWF appealed the decision and on December 9, 2016, the appeals court ruled in favor of BCWF. Duke Energy Indiana recorded an obligation and a regulatory asset related to the settlement amount in fourth quarter 2016. On June 30, 2017, the parties finalized a settlement agreement with the IURC.agreement. Terms of the settlement includeincluded Duke Energy Indiana paying $29 million for back damages. Additionally, the parties agreed on the method by which the contract will be bid into the market in the future. The settlement amount was paid in June 2017. The IURC issued an order on September 27, 2017, approving recovery of 60 percent of the estimated CCR compliance construction project capital costssettlement amount through existing rider mechanisms and deferral of 40 percent of these costs until Duke Energy Indiana's next general retail rate case.fuel clause. The deferred costs will earn a return based onIURC order has been appealed to the Indiana Court of Appeals. On May 21, 2018, the Indiana Court of Appeals upheld the commission's decision. The appellants have requested rehearing at the Indiana Court of Appeals. The Indiana Court of Appeals denied the request for rehearing. The appellants have requested transfer to the Indiana Supreme Court, including briefs in support from environmental groups. The Indiana Supreme Court denied transfer concluding this matter in favor of Duke Energy Indiana's long-term debt rate of 4.73 percent until costs are included in retail rates, at which time the deferred costs will earn a full return. Costs are to be capped at $365 million, plus actual AFUDC. Costs above the cap would be considered for recovery in the next rate case. Terms of the settlement agreement also require Duke Energy Indiana to perform certain reporting and groundwater monitoring. On May 24, 2017, the IURC approved the settlement agreement.Indiana.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Edwardsport Integrated Gasification Combined Cycle Plant
Costs for the Edwardsport Integrated Gasification Combined Cycle (IGCC) Plant are recovered from retail electric customers via a tracking mechanism (IGCC rider) with updates filed by Duke Energy Indiana. The IGCC Plant was placed into commercial operation in June 2013.
On August 24, 2016, the IURC approved a settlement (IGCC Settlement) amongSeptember 20, 2018, Duke Energy Indiana, the Indiana Office of Utility Consumer Counselor, the Duke Industrial Group and several intervenorsNucor Steel – Indiana entered into a settlement agreement to resolve disputes related to five IGCC riders (the 11th through 15th)ratemaking issues for calendar years 2018 and a subdocket to2019. The agreement will remain in effect until new rates are established in Duke Energy Indiana's fuel adjustment clause. The IGCCnext base rate case, which is expected to be filed in mid-2019 with rates effective in mid-2020. It addresses the pending Edwardsport filing at the commission and eliminates the need for future filings until the overall rate case. This settlement resulted in customers not being billed for previously incurred plant operating costs of $87.5 million and payments and commitments fromincludes caps on Duke Energy IndianaIndiana’s retail operating expenses for 2018 and 2019, reduces Duke Energy Indiana's regulatory asset by $30 million (with a corresponding reduction of $5.5the amount of amortization of the regulatory asset included in rates by $10 million annually beginning with the implementation of final IGCC 17 rates), and provides funding for attorneys’ feeslow-income assistance and consumer programs funding.clean energy projects. Duke Energy Indiana recognized pretax impairment and related charges of $93$32 million in 2015. Additionally, under the IGCC settlement, the recovery of operating and maintenance expenses and ongoing maintenance capital at the plant were subject to certain caps during the years of 2016 and 2017. The IGCC settlement also included a commitment to either retire or stop burning coal by December 31, 2022, at the Gallagher Station. Pursuant to the IGCC settlement, the in-service date used for accounting and ratemaking will remain as June 2013. Remaining deferred costs will be recovered over eight years beginning in 2016 and not earn a carrying cost. As of December 31, 2017, deferred costs related to the project are approximately $152 million and are included in Regulatory assets in Current Assets and Other Noncurrent Assets on Duke Energy Indiana's Consolidated Balance Sheets. Under the IGCC settlement, future IGCC riders will be filed annually with the next filing scheduled for first quarter 2018.
The ninth semi-annual IGCC rider order was appealed by various intervenors and the matter was remanded to the IURC for further proceedings and additional findings on a tax in-service issue. On February 2, 2017, the IURC issued an order upholding the original decision, finding that an estimate of impact on customer rates due to the federal income tax in-service determination was reasonable.
FERC Transmission Return on Equity Complaint
Customer groups have filed with the FERC complaints against MISO and its transmission-owning members, including Duke Energy Indiana, alleging, among other things, that the current base rate of return on equity earned by MISO transmission owners of 12.38 percent is unjust and unreasonable. The complaints claim, among other things, that the current base rate of return on equity earned by MISO transmission owners should be reduced to 8.67 percent. On January 5, 2015, the FERC issued an order accepting the MISO transmission owners' adder of 0.50 percent to the base rate of return on equity based on participation in an RTO subject to it being applied to a return on equity that is shown to be just and reasonable in the pending return on equity complaints. On December 22, 2015, the presiding FERC ALJ in the first complaint issued an Initial Decision in which the base rate of return on equity was set at 10.32 percent. On September 28, 2016, the Initial Decision in the first complaint was affirmed by FERC, but is subject to rehearing requests. On June 30, 2016, the presiding FERC ALJ in the second complaint issued an Initial Decision setting the base rate of return on equity at 9.70 percent. The Initial Decision in the second complaint is pending FERC review. On April 14, 2017, the U.S. Court of Appeals for the District of Columbia Circuit, in Emera Maine v. FERC, reversed and remanded certain aspects of the methodology employed by FERC to establish rates of return on equity. This decision may affect the outcome of the complaints against Duke Energy Indiana. Duke Energy Indiana currently believes these matters will not have a material impact on its results of operations, cash flows and financial position.
Grid Infrastructure Improvement Plan
On December 7, 2015, Duke Energy Indiana filed a grid infrastructure improvement plan with an estimated cost of $1.8 billion in response to guidance from IURC orders and the Indiana Court of Appeals decisions related to a new statute. The plan uses a combination of advanced technology and infrastructure upgrades to improve service to customers and provide them with better information about their energy use. It also provides for cost recovery through a transmission and distribution rider (T&D Rider). In March 2016, Duke Energy Indiana entered into a settlement with all parties to the proceeding except the Citizens Action Coalition of Indiana, Inc. The settlement agreement decreased the capital expenditures eligible for timely recovery of costs in the seven-year plan to approximately $1.4 billion, including the removal of an AMI project. Under the settlement, the return on equity to be used in the T&D Rider is 10 percent. The IURC approved the settlement and issued a final order on June 29, 2016. The order was not appealed and the proceeding is concluded.
The settlement agreement provided for deferral accounting for depreciation and post-in-service carrying costs for AMI projects outside the plan. Duke Energy Indiana withdrew its request for a regulatory asset for current meters and will retain any savings associated with future AMI installation until the next retail base rate case, which is required to be filed prior to the end of the plan. During the third quarter of 2016, Duke Energy Indiana decided to implement the AMI project. This decision resulted in a pretax impairment charge related to existing or non-AMI meters of approximately $8 million in 2016, based in part on the requirement to file a base rate case in 2022 under the approved plan. Duke Energy Indiana evaluates the need for rate cases as part of its business planning, based on the outlook of emerging costs, ongoing investment and impact related to the Tax Act enacted in late 2017 and expects to file a rate case prior to the 2022 requirement. As a result, in 2017, Duke Energy Indiana recorded an additional impairment charge of approximately $22 million. As of December 31, 2017, Duke Energy Indiana's remaining net book value of non-AMI meters is approximately $21 million and will be depreciated through July 2020.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Benton County Wind Farm Dispute
On December 16, 2013, Benton County Wind Farm LLC (BCWF) filed a lawsuit against Duke Energy Indiana seeking damages for past generation losses alleging Duke Energy Indiana violated its obligations under a 2006 PPA by refusing to offer electricity to the market at negative prices. Damage claims continue to increase during times that BCWF is not dispatched. Under 2013 revised MISO market rules, Duke Energy Indiana is required to make a price offer to MISO for the power it proposes to sell into MISO markets and MISO determines whether BCWF is dispatched. Because market prices would have been negative due to increased market participation, Duke Energy Indiana determined it would not bid at negative prices in order to balance customer needs against BCWF's need to run. BCWF contends Duke Energy Indiana must bid at the lowest negative price to ensure dispatch, while Duke Energy Indiana contends it is not obligated to bid at any particular price, that it cannot ensure dispatch with any bid and that it has reasonably balanced the parties' interests. On July 6, 2015, the U.S. District Court for the Southern District of Indiana entered judgment against BCWF on all claims. BCWF appealed the decision and on December 9, 2016, the appeals court ruled in favor of BCWF. Duke Energy Indiana recorded an obligation and a regulatory asset related to the settlement amount in fourth quarter 2016. On June 30, 2017, the parties finalized a settlement agreement. Terms of the settlement included Duke Energy Indiana paying $29 million for back damages. Additionally, the parties agreed on the method by which the contract will be bid into the market in the future.2018. The settlement amountis subject to IURC approval. An evidentiary hearing was paidheld December 2018 and an IURC Order is expected in June 2017. The IURC issued an order on September 27, 2017, approving recovery of the settlement amount through Duke Energy Indiana's fuel clause. The IURC order has been appealed to the Indiana Court of Appeals.March 2019. Duke Energy Indiana cannot predict the outcome of this matter.
Tax Act
On June 27, 2018, Duke Energy Indiana, the Indiana Office of Utility Consumer Counselor, the Indiana Industrial Group and Nucor Steel – Indiana filed testimony consistent with their Stipulation and Settlement Agreement (Settlement Agreement) in the federal tax act proceeding with the IURC. The Settlement Agreement outlines how Duke Energy Indiana will implement the impacts of the Tax Act. Material components of the Settlement Agreement were as follows:
Riders to reflect the change in the statutory federal tax rate from 35 to 21 percent as they are filed in 2018;
Base rates to reflect the change in the statutory federal tax rate from 35 to 21 percent upon IURC approval, but no later than September 1, 2018;
Duke Energy Indiana to continue to defer protected federal EDIT until January 1, 2020, at which time it will be returned to customers according to the Average Rate Assumption Method required by the Internal Revenue Service over approximately 26 years; and
Duke Energy Indiana to begin returning unprotected federal EDIT upon IURC approval, over 10 years. In order to mitigate the negative impacts to cash flow and credit metrics, the Settlement Agreement allows Duke Energy Indiana to return $7 million per year over the first five years, with a step up to $35 million per year in the following five years.
On August 22, 2018, the IURC approved the settlement and rates were adjusted effective September 1, 2018.



FINANCIAL STATEMENTSREGULATORY MATTERS


Piedmont
Regulatory Assets and Liabilities
The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets.
December 31, Earns/PaysRecovery/RefundDecember 31, Earns/PaysRecovery/Refund
(in millions)2017
2016
 a ReturnPeriod Ends2018
2017
 a ReturnPeriod Ends
Regulatory Assets(a)
    
AROs - other$15
$14
 (d)
AROs – other$19
$15
 (d)
Accrued pension and OPEB(c)
91
166
 (f)99
91
 X(f)
Derivatives - gas supply contracts142
187
 (e)
Derivatives – gas supply contracts(e)
141
142
 
Vacation accrual(c)
10
13
 201812
10
 
Deferred pipeline integrity costs(c)
42
36
 201851
42
 X(b)
Amount due from customers64
66
 X(b)24
64
 X(b)
Other14
15
 (b)11
14
 (b)
Total regulatory assets378
497
 357
378
 
Less: current portion95
124
 54
95
 
Total noncurrent regulatory assets$283
$373
 $303
$283
 
Regulatory Liabilities(a)
    
Costs of removal$544
$528
 (d)$564
$544
 (d)
Net regulatory liability related to income taxes597
80
 (b)579
597
 (b)
Accrued pension and OPEB(c)
1

 X(f)
Amount due to customers33

 X(b)
Other3

 (b)41
3
 (b)
Total regulatory liabilities1,144
608
 1,218
1,144
 
Less: current portion3

 37
3
 
Total noncurrent regulatory liabilities$1,141
$608
 $1,181
$1,141
 
(a)Regulatory assets and liabilities are excluded from rate base unless otherwise noted.
(b)The expected recovery or refund period varies or has not been determined.
(c)Included in rate base.
(d)Recovery over the life of the associated assets.
(e)Balance will fluctuate with changes in the market. Current contracts extend into 2031.
(f)Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 2122 for additional detail.
South Carolina Rate Stabilization Adjustment Filing
InOn June 2017,15, 2018, Piedmont filed with the PSCSC under the South Carolina Rate Stabilization Act its quarterly monitoring report for the 12-month period ending March 31, 2017.2018. The filing included a revenue deficiency calculation and tariff rates in order to permit Piedmont the opportunity to earn the rate of return on common equity of 12.6 percent established in its last general rate case. On October 4, 2017,The filing also incorporated the PSCSC approved aimpacts of the Tax Act by lowering the income tax component of the revenue requirement, refunding protected EDIT under allowable normalization rules, unprotected EDIT and amounts over collected from the customers from January 1, 2018, through the end of the review period for this proceeding. A settlement agreement reached between Piedmont and ORS was filed with the SC Office of Regulatory Staff.PSCSC on September 14, 2018, and approved by the PSCSC on October 3, 2018. Terms of the settlement includedinclude implementation of rates for the 12-month period beginning November 20172018 with a return on equity of 10.2 percent.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

North Carolina Integrity Management Rider FilingsFiling
In October 2017,2018, Piedmont filed a petition with the NCUC under the Integrity Management Rider (IMR)IMR mechanism to collect an additional $8.9$10 million in annual revenues, effective December 2017,2018, based on the eligible capital investments closed to integrity and safety projects over the six-month period endingended September 30, 2017.2018. On November 28, 2017,27, 2018, the NCUC approved the requested rate adjustment.
In May 2017,2018, Piedmont filed, and the NCUC approved, a petition under the IMR mechanism to collect an additional $11.6 million in annual revenues,update rates, effective June 2017,2018, based on the eligible capital investments closed to integrity and safety projects over the six-month period ending March 31, 2017.2018, and the decrease in the corporate federal income tax rate effective January 1, 2018. The combined effect of the update was a reduction to annual revenues of approximately $6 million.
Tennessee Integrity Management Rider Filing
In November 2017,2018, Piedmont filed a petition with the TPUC under the IMR mechanism to collect an additional $3.3$3 million in annual revenues, effective January 2018,2019, based on the eligible capital investments closed to integrity and safety projects over the 12-month period ending October 31, 2017. In January 2018, Piedmont filed an amended computation under the IMR mechanism, revising the proposed increase in annual revenues to approximately $0.4 million based on the decrease in the corporate federal income tax rate effective January 1, 2018. A hearing on this matter is scheduled for March 2018.2019.



FINANCIAL STATEMENTSREGULATORY MATTERS


2018 North Carolina Rate Case
On February 27, 2019, Piedmont filed a notice with the NCUC of its intent to file a base rate adjustment application no earlier than 30 days from the notice submittal date.
OTHER REGULATORY MATTERS
Atlantic Coast Pipeline
On September 2, 2014, Duke Energy, Dominion Resources (Dominion), Piedmont and Southern Company Gas announced the formation of Atlantic Coast Pipeline, LLC (ACP) to build and own the proposed Atlantic Coast Pipeline (ACP pipeline), an approximately 600-mile interstate natural gas pipeline running from West Virginia to North Carolina. The ACP pipeline is designed to meet, in part, the needs identified by Duke Energy Carolinas, Duke Energy Progress and Piedmont. Dominion will build and operate the ACP pipeline and holds a leading ownership percentage in ACP of 48 percent. Duke Energy owns a 47 percent interest through its Gas Utilities and Infrastructure segment. Southern Company Gas maintains a 5 percent interest. See Notes 12 and 17 for additional information related to Duke Energy's ownership interest.
Duke Energy Carolinas, Duke Energy Progress and Piedmont, among others, will be customers of the pipeline. Purchases will be made under several 20-year supply contracts, subject to state regulatory approval. On September 18, 2015, ACP filed an application with the FERC requesting a CPCN authorizing ACP to construct the pipeline. ACP executed a construction agreement in September 2016. ACP also requested approval of an open access tariff and the precedent agreements it entered into with future pipeline customers. In December 2016, FERC issued a draft Environmental Impact Statement (EIS) indicating that the proposed pipeline would not cause significant harm to the environment or protected populations. The FERC issued the final EIS in July 2017. On October 13, 2017, FERC issued an order approving the CPCN, subject to conditions. On October 16, 2017, ACP accepted the FERC order subject to reserving its right to file a request for rehearing or clarification on a timely basis. On November 9, 2017, ACP filed a request for rehearing on several limited issues. On December 12, 2017, ACP filed an answer to intervenors’ request for rehearing of the certificate order and for stay of the certificate order.
In December 2017, West Virginia issued a waiver of the state water quality permit in reliance on the U.S. Army Corps of Engineers national water quality permit and Virginia issued a conditional water quality permit subject to completion of additional studies and stormwater plans. In early 2018, the FERC issued a series of Partial Notices to Proceed which authorized the project to begin limited construction-related activities along the pipeline route. North Carolina issued the state water quality permit in January 2018. The project remains subject to other pending federal and state approvals, which will allow full construction activities to begin. The ACP pipeline project has a targeted in-service date of late 2019.
Due to delays in obtaining the required permits to commence construction and the conditions imposed upon the project by the permits, ACP's project manager estimates the project's pipeline development costs have increased from a range of $5.0 billion to $5.5 billion to a range of $6.0 billion and $6.5 billion, excluding financing costs. Project construction activities, schedule and final costs are still subject to uncertainty due to potential additional permitting delays, construction productivity and other conditions and risks which could result in potential higher project costs and a potential delay in the targeted in-service date.
Sabal Trail Transmission Pipeline
On May 4, 2015, Duke Energy acquired a 7.5 percent ownership interest in Sabal Trail Transmission, LLC (Sabal Trail) from Spectra Energy Partners, LP, a master limited partnership, formed by Enbridge Inc. (formerly Spectra Energy Corp.). Spectra Energy Partners, LP holds a 50 percent ownership interest in Sabal Trail and NextEra Energy has a 42.5 percent ownership interest. Sabal Trail is a joint venture to construct a 515-mile natural gas pipeline (Sabal Trail pipeline) to transport natural gas to Florida. Total estimated project costs are approximately $3.2 billion. The Sabal Trail pipeline traverses Alabama, Georgia and Florida. The primary customers of the Sabal Trail pipeline, Duke Energy Florida and Florida Power & Light Company (FP&L), have each contracted to buy pipeline capacity for 25-year initial terms. See Notes 12 and 17 for additional information.
On February 3, 2016, the FERC issued an order granting the request for a CPCN to construct and operate the pipeline. The Sabal Trail pipeline received other required regulatory approvals and the phase one mainline was placed in service in July 2017. On October 12, 2017, Sabal Trail filed a request with FERC to place in-service a lateral line to Duke Energy Florida's Citrus County Combined Cycle facility, which remains pending. This request is required to support commissioning and testing activities at the facility.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

On September 21, 2016, intervenors filed an appeal of FERC's CPCN orders to the U.S. Court of Appeals for the District of Columbia Circuit (D.C. Circuit Court of Appeals). On August 22, 2017, the appeals court ruled against FERC in the case for failing to include enough information on the impact of greenhouse-gas emissions carried by the pipeline, vacated the CPCN order and remanded the case to FERC. In response to the August 2017 court decision, the FERC issued a draft Supplemental Environmental Impact Statement (SEIS) on September 27, 2017. On October 6, 2017, FERC and a group of industry intervenors, including Sabal Trail and Duke Energy Florida, filed separate petitions with the D.C. Circuit Court of Appeals requesting rehearing regarding the court's decision to vacate the CPCN order. On January 31, 2018, the D.C. Circuit Court of Appeals denied the requests for rehearing. On February 2, 2018, Sabal Trail filed a request with FERC for expedited issuance of its order on remand and reissuance of the CPCN. In the alternative, the pipeline requested that FERC issue a temporary emergency CPCN to allow for continued operations. On February 5, 2018, FERC issued the final SEIS but did not issue the order on remand. On February 6, 2018, FERC and the intervenors in this case each filed motions for stay with the D.C. Circuit Court to stay the court's mandate. The February 6, 2018 motions automatically stay the issuance of the court’s mandate until the later of seven days after the court denies the motions or the expiration of any stay granted by the court. Both motions are pending. Sabal Trail will continue to monitor the progress and the impact to the project going forward.
Constitution Pipeline
Duke Energy owns a 24 percent ownership interest in Constitution Pipeline Company, LLC (Constitution). Constitution is a natural gas pipeline project slated to transport natural gas supplies from the Marcellus supply region in northern Pennsylvania to major northeastern markets. The pipeline will be constructed and operated by Williams Partners L.P., which has a 41 percent ownership share. The remaining interest is held by Cabot Oil and Gas Corporation and WGL Holdings, Inc. Before the permitting delays discussed below, Duke Energy's total anticipated contributions were approximately $229 million. As a result of the permitting delays and project uncertainty, total anticipated contributions by Duke Energy can no longer be reasonably estimated.
In December 2014, Constitution received approval from the FERC to construct and operate the proposed pipeline. However, on April 22, 2016, the New York State Department of Environmental Conservation (NYSDEC) denied Constitution’s application for a necessary water quality certification for the New York portion of the Constitution pipeline. Constitution filed legal actions in the U.S. Court of Appeals for the Second Circuit (U.S. Court of Appeals) challenging the legality and appropriateness of the NYSDEC’s decision and on August 18, 2017, the petition was denied in part and dismissed in part. In September 2017, Constitution filed a petition for a rehearing of portions of the decision unrelated to the water quality certification, which was denied by the U.S. Court of Appeals. In January 2018, Constitution petitioned the Supreme Court of the United States to review the U.S. Court of Appeals decision. In October 2017, Constitution filed a petition for declaratory order requesting FERC to find that the NYSDEC waived its rights to issue a Section 401 water quality certification by not acting on Constitution's application within a reasonable period of time as required by statute. This petition was based on precedent established by another pipeline’s successful petition with FERC following a District of Columbia Circuit Court ruling. On January 11, 2018, FERC denied Constitution's petition. In February 2018, Constitution filed a rehearing request with FERC of its finding that the NYSDEC did not waive the Section 401 certification requirement. Constitution is currently unable to approximate an in-service date for the project due to the NYDSEC's denial of the water quality certification. The Constitution partners remain committed to the project and are evaluating next steps to move the project forward. Duke Energy cannot predict the outcome of this matter.
Since April 2016, with the actions of the NYSDEC, Constitution stopped construction and discontinued capitalization of future development costs until the project's uncertainty is resolved.
See Notes 12 and 17 for additional information related to ownership interest and carrying value of the investment.
Progress Energy Merger FERC Mitigation
Following the closing of the Progress Energy merger, outside counsel reviewed Duke Energy’s long-term FERC mitigation plan and discovered a technical error in the calculations. On December 6, 2013, Duke Energy submitted a filing to the FERC disclosing the error and arguing that no additional mitigation is necessary. The city of New Bern filed a protest and requested that FERC order additional mitigation. On October 29, 2014, the FERC ordered that the amount of the stub mitigation be increased from 25 MW to 129 MW. The stub mitigation is Duke Energy’s commitment to set aside for third parties a certain quantity of firm transmission capacity from Duke Energy Carolinas to Duke Energy Progress during summer off-peak hours. The FERC also ordered that Duke Energy operate certain phase shifters to create additional import capability and that such operation be monitored by an independent monitor. The costs to comply with this order are not material. The FERC also referred Duke Energy’s failure to expressly designate the phase shifter reactivation as a mitigation project in the original mitigation plan filing in March 2012 to the FERC Office of Enforcement for further inquiry. In response, and sinceSince December 2014, the FERC Office of Enforcement has been conducting a nonpublicconducted an investigation of Duke Energy'sEnergy’s market power analyses includedfilings in its application for approval of the Progress Energy merger submitted in 2012. On June 8, 2018, the FERC issued an order approving a settlement agreement under which Duke Energy paid a penalty of $3.5 million. The FERC Office of Enforcement stated in its conclusion that Duke Energy violated FERC regulations by failing to fully and accurately describe certain specific matters in its market power filings. Duke Energy neither admitted nor denied the alleged violations.
Atlantic Coast Pipeline, LLC
On September 2, 2014, Duke Energy, Dominion Resources (Dominion), Piedmont and Southern Company Gas announced the formation of Atlantic Coast Pipeline, LLC (ACP) to build and own the proposed Atlantic Coast Pipeline (ACP pipeline), an approximately 600-mile interstate natural gas pipeline running from West Virginia to North Carolina. The ACP pipeline is designed to meet, in part, the needs identified by Duke Energy Carolinas, Duke Energy Progress and Piedmont. Dominion will be responsible for building and operating the ACP pipeline and holds a leading ownership percentage in ACP of 48 percent. Duke Energy owns a 47 percent interest, which is accounted for as an equity method investment through its Gas Utilities and Infrastructure segment. Southern Company Gas maintains a 5 percent interest. See Notes 12 and 17 for additional information related to Duke Energy's ownership interest. Duke Energy Carolinas, Duke Energy Progress and Piedmont, among others, will be customers of the pipeline. Purchases will be made under several 20-year supply contracts, subject to state regulatory approval.
In 2018, the FERC issued a series of Notices to Proceed, which authorized the project to begin certain construction-related activities along the pipeline route, including supply header and compressors. On May 11, 2018, and October 19, 2018, FERC issued Notices to Proceed allowing full construction activities in all areas of West Virginia except in the Progress merger filings submittedMonongahela National Forest. On July 24, 2018, FERC issued a Notice to Proceed allowing full construction activities along the project route in North Carolina. On October 19, 2018, the conditions to effectiveness of the Virginia 401 water quality certification were satisfied. Immediately following receipt of the Virginia 401 certification, ACP filed a request for FERC to issue a Notice to Proceed with full construction activities in Virginia. We appreciate the professional and collaborative process by the permitting agencies designed to ensure that this critical energy infrastructure project will meet the stringent environmental standards required by law and regulation.
ACP is the subject of challenges in state and federal courts and agencies, including, among others, challenges of the project’s incidental take statement (ITS), crossings of the Blue Ridge Parkway, the Appalachian Trail, and the Monongahela and George Washington National Forests, the project’s U.S. Army Corps of Engineers (USACE) 404 permit, the Virginia conditional 401 water quality certification, the FERC Environmental Impact Statement order and the FERC order approving the Certificate of Public Convenience and Necessity. Each of these challenges alleges non-compliance on the part of federal and state permitting authorities and adverse ecological consequences if the project is permitted to proceed. ACP is vigorously defending these challenges and coordinating with the federal and state authorities which are the direct parties to the challenges. Since July 2018, notable developments in these challenges include a stay issued by the U.S. Court of Appeals for the Fourth Circuit (Fourth Circuit) on construction activities through the Monongahela and George Washington National Forests, a reissuance of the project’s ITS and Blue Ridge Parkway right-of-way and renewed challenges of these reissued permits, a stay issued by the Fourth Circuit of the project's biological opinion and ITS (which stay has halted most project construction activity), a Fourth Circuit decision vacating the project's permits to cross the Monongahela and George Washington National Forests and the Appalachian Trail and the Fourth Circuit's remand to USACE of ACP's Huntington District 404 verification.
The delays resulting from the legal challenges described above have impacted the cost and schedule for the project. As a result, project cost estimates have increased to $7.0 billion to $7.8 billion, excluding financing costs. ACP expects to achieve a late 2020 in-service date for key segments of the project, while it expects the remainder to extend into 2021. Abnormal weather, work delays (including delays due to judicial or regulatory action) and other conditions may result in cost or schedule modifications in the future.
Sabal Trail Transmission, LLC
On May 4, 2015, Duke Energy acquired a 7.5 percent ownership interest in Sabal Trail, which is accounted for as an equity method investment, from Spectra Energy Partners, LP, a master limited partnership, formed by Enbridge Inc. (formerly Spectra Energy Corp.). Spectra Energy Partners, LP holds a 50 percent ownership interest in Sabal Trail and NextEra Energy has a 42.5 percent ownership interest. Sabal Trail is a joint venture to construct a 515-mile natural gas pipeline (Sabal Trail pipeline) to transport natural gas to Florida. Total estimated project costs are approximately $3.2 billion. The Sabal Trail pipeline traverses Alabama, Georgia and Florida. The primary customers of the Sabal Trail pipeline, Duke Energy Florida and FP&L have each contracted to buy pipeline capacity for 25-year initial terms. See Notes 12 and 17 for additional information related to Duke Energy's ownership interest.
On February 3, 2016, the FERC issued an order granting the request for a CPCN to construct and operate the pipeline. The Sabal Trail pipeline received other required regulatory approvals and the Phase 1 mainline was placed in service in July 2017. On October 12, 2017, Sabal Trail filed a request with FERC to place in-service a lateral line to Duke Energy Florida's Citrus County CC. This request is required to support commissioning and testing activities at the facility. On March 16, 2018, FERC approved the Citrus lateral and it was placed in service.



FINANCIAL STATEMENTSREGULATORY MATTERS


On September 21, 2016, intervenors filed an appeal of FERC's CPCN orders to the U.S. Court of Appeals for the District of Columbia Circuit (D.C. Circuit Court of Appeals). On August 22, 2017, the appeals court ruled against FERC in the case for failing to include enough information on the impact of greenhouse-gas emissions carried by the pipeline, vacated the CPCN order and remanded the case to FERC. In response to the August 2017 court decision, the FERC issued a draft Supplemental Environmental Impact Statement (SEIS) on September 27, 2017. On October 6, 2017, FERC and a group of industry intervenors, including Sabal Trail and Duke Energy cannot predictFlorida, filed separate petitions with the outcomeD.C. Circuit Court of Appeals requesting rehearing regarding the court's decision to vacate the CPCN order. On January 31, 2018, the D.C. Circuit Court of Appeals denied the requests for rehearing. On February 2, 2018, Sabal Trail filed a request with FERC for expedited issuance of its order on remand and reissuance of the CPCN. In the alternative, the pipeline requested that FERC issue a temporary emergency CPCN to allow for continued operations. On February 5, 2018, FERC issued the final SEIS. On February 6, 2018, FERC and the intervenors in this investigation.case each filed motions for stay with the D.C. Circuit Court to stay the court's mandate. On March 7, 2018, the D.C. Circuit Court of Appeals granted FERC and Sabal Trail’s stay request. On March 14, 2018, FERC issued its final order on remand, which recertified the project. On August 10, 2018, FERC denied requests for rehearing of the final order on remand.
Constitution Pipeline Company, LLC
Duke Energy owns a 24 percent ownership interest in Constitution, which is accounted for as an equity method investment. Constitution is a natural gas pipeline project slated to transport natural gas supplies from the Marcellus supply region in northern Pennsylvania to major northeastern markets. The pipeline will be constructed and operated by Williams Partners L.P., which has a 41 percent ownership share. The remaining interest is held by Cabot Oil and Gas Corporation and WGL Holdings, Inc. Before the permitting delays discussed below, Duke Energy's total anticipated contributions were approximately $229 million. As a result of the permitting delays and project uncertainty, total anticipated contributions by Duke Energy can no longer be reasonably estimated. Since April 2016, with the actions of the New York State Department of Environmental Conservation (NYSDEC), Constitution stopped construction and discontinued capitalization of future development costs until the project's uncertainty is resolved.
In December 2014, Constitution received approval from the FERC to construct and operate the proposed pipeline. However, on April 22, 2016, the NYSDEC denied Constitution’s application for a necessary water quality certification for the New York portion of the Constitution pipeline. Constitution filed legal actions in the U.S. Court of Appeals for the Second Circuit (U.S. Court of Appeals) challenging the legality and appropriateness of the NYSDEC’s decision and on August 18, 2017, the petition was denied in part and dismissed in part. In September 2017, Constitution filed a petition for a rehearing of portions of the decision unrelated to the water quality certification, which was denied by the U.S. Court of Appeals. In January 2018, Constitution petitioned the Supreme Court of the United States to review the U.S. Court of Appeals decision, and on April 30, 2018, the Supreme Court denied Constitution's petition. In October 2017, Constitution filed a petition for declaratory order requesting FERC to find that the NYSDEC waived its rights to issue a Section 401 water quality certification by not acting on Constitution's application within a reasonable period of time as required by statute. This petition was based on precedent established by another pipeline’s successful petition with FERC following a District of Columbia Circuit Court ruling. On January 11, 2018, FERC denied Constitution's petition. In February 2018, Constitution filed a rehearing request with FERC of its finding that the NYSDEC did not waive the Section 401 certification requirement. On July 19, 2018, FERC denied Constitution's rehearing request. Constitution is currently unable to approximate an in-service date for the project due to the NYSDEC's denial of the water quality certification. The Constitution partners remain committed to the project and are evaluating next steps to move the project forward. On June 25, 2018, Constitution filed with FERC a Request for Extension of Time until December 2, 2020, for construction of the project. On November 5, 2018, FERC issued an Order Granting Extension of Time.
See Notes 12 and 17 for additional information related to ownership interest and carrying value of the investment.
Potential Coal Plant Retirements
The Subsidiary Registrants periodically file Integrated Resource Plans (IRP)IRPs with their state regulatory commissions. The IRPs provide a view of forecasted energy needs over a long term (10 to 20 years) and options being considered to meet those needs. Recent IRPs filed by the Subsidiary Registrants included planning assumptions to potentially retire certain coal-fired generating facilities in FloridaNorth Carolina and Indiana earlier than their current estimated useful lives primarily because facilities do not have the requisite emission control equipment to meet EPA regulations recently approved or proposed.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

regulatory requirements expected to apply in the near future. Duke Energy continues to evaluate the potential need to retire these coal-fired generating facilities earlier than the current estimated useful lives and plans to seek regulatory recovery for amounts that would not be otherwise recovered when any of these assets are retired.
The table below contains the net carrying value of generating facilities planned for retirement or included in recent IRPs as evaluated for potential retirement due to a lack of requisite environmental control equipment. Dollar amounts in the table below are included in Net property, plant and equipment on the Consolidated Balance Sheets as of December 31, 2017,2018, and exclude capitalized asset retirement costs.
  Remaining Net
  Remaining Net
Capacity
 Book Value
Capacity
 Book Value
(in MW)
 (in millions)
(in MW)
 (in millions)
Duke Energy Carolinas      
Allen Steam Station Units 1-3(a)
585
 $163
585
 $162
Progress Energy and Duke Energy Florida   
Crystal River Units 1 and 2(b)
873
 107
Duke Energy Indiana      
Gallagher Units 2 and 4(c)
280
 127
Gallagher Units 2 and 4(b)
280
 121
Total Duke Energy1,738
 $397
865
 $283
(a)Duke Energy Carolinas will retire Allen Steam Station Units 1 through 3 by December 31, 2024, as part of the resolution of a lawsuit involving alleged New Source Review violations.
(b)Duke Energy Florida expects to retire these coal units by the end of 2018 to comply with environmental regulations.
(c)Duke Energy Indiana committed to either retire or stop burning coal at Gallagher Units 2 and 4 by December 31, 2022, as part of the 2016 settlement of Edwardsport IGCC matters.



FINANCIAL STATEMENTSREGULATORY MATTERS


Refer to the "Western Carolinas Modernization Plan" discussion above for details of Duke Energy Progress' planned retirements.
5. COMMITMENTS AND CONTINGENCIES
INSURANCE
General Insurance
The Duke Energy Registrants have insurance and reinsurance coverage either directly or through indemnification from Duke Energy’s captive insurance company, Bison, and its affiliates, consistent with companies engaged in similar commercial operations with similar type properties. The Duke Energy Registrants’ coverage includes (i) commercial general liability coverage for liabilities arising to third parties for bodily injury and property damage; (ii) workers’ compensation; (iii) automobile liability coverage; and (iv) property coverage for all real and personal property damage. Real and personal property damage coverage excludes electric transmission and distribution lines, but includes damages arising from boiler and machinery breakdowns, earthquakes, flood damage and extra expense, but not outage or replacement power coverage. All coverage is subject to certain deductibles or retentions, sublimits, exclusions, terms and conditions common for companies with similar types of operations. The Duke Energy Registrants self-insure their electric transmission and distribution lines against loss due to storm damage and other natural disasters. As discussed further in Note 4, Duke Energy Florida maintains a storm damage reserve and has a regulatory mechanism to recover the cost of named storms on an expedited basis.
The cost of the Duke Energy Registrants’ coverage can fluctuate from year to year reflecting claims history and conditions of the insurance and reinsurance markets.
In the event of a loss, terms and amounts of insurance and reinsurance available might not be adequate to cover claims and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered by other sources, could have a material effect on the Duke Energy Registrants’ results of operations, cash flows or financial position. Each company is responsible to the extent losses may be excluded or exceed limits of the coverage available.
Nuclear Insurance
Duke Energy Carolinas owns and operates the McGuire Nuclear Station (McGuire) and the Oconee Nuclear Station (Oconee) and operates and has a partial ownership interest in the Catawba Nuclear Station (Catawba).Catawba. McGuire and Catawba each have two reactors. Oconee has three reactors. The other joint owners of Catawba reimburse Duke Energy Carolinas for certain expenses associated with nuclear insurance per the Catawba joint owner agreements.
Duke Energy Progress owns and operates the Robinson, Nuclear Plant (Robinson), Brunswick and Harris. Robinson and Harris each have one reactor. Brunswick has two reactors.
Duke Energy Florida owns Crystal River Unit 3, which permanently ceased operation in 2013 and reached a SAFSTOR condition in January 2018 after the successful transfer of all used nuclear fuel assemblies to an onsiteon-site dry cask storage facility.
In the event of a loss, terms and amounts of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered by other sources, could have a material effect on Duke Energy Carolinas’, Duke Energy Progress’ and Duke Energy Florida’s results of operations, cash flows or financial position. Each company is responsible to the extent losses may be excluded or exceed limits of the coverage available.

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Combined Notes To Consolidated Financial Statements – (Continued)

Nuclear Liability Coverage
The Price-Anderson Act requires owners of nuclear reactors to provide for public nuclear liability protection per nuclear incident up to a maximum total financial protection liability. The maximum total financial protection liability, which is approximately $13.4$14.1 billion, is subject to change every five years for inflation and for the number of licensed reactors. Total nuclear liability coverage consists of a combination of private primary nuclear liability insurance coverage and a mandatory industry risk-sharing program to provide for excess nuclear liability coverage above the maximum reasonably available private primary coverage. The U.S. Congress could impose revenue-raising measures on the nuclear industry to pay claims.
Primary Liability Insurance
Duke Energy Carolinas Duke Energy Progress and Duke Energy FloridaProgress have purchased the maximum reasonably available private primary nuclear liability insurance as required by law, which is $450 million per station. Duke Energy Florida has purchased $100 million primary nuclear liability insurance in compliance with the law.
Excess Liability Program
This program provides $13$13.6 billion of coverage per incident through the Price-Anderson Act’s mandatory industrywide excess secondary financial protection program of risk pooling. This amount is the product of potential cumulative retrospective premium assessments of $127$138 million times the current 10299 licensed commercial nuclear reactors in the U.S. Under this program, licensees could be assessed retrospective premiums to compensate for public nuclear liability damages in the event of a nuclear incident at any licensed facility in the U.S. Retrospective premiums may be assessed at a rate not to exceed $19$20.5 million per year per licensed reactor for each incident. The assessment may be subject to state premium taxes.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


Nuclear Property and Accidental Outage Coverage
Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are members of Nuclear Electric Insurance Limited (NEIL),NEIL, an industry mutual insurance company, which provides property damage, nuclear accident decontamination and premature decommissioning insurance for each station for losses resulting from damage to its nuclear plants, either due to accidents or acts of terrorism. Additionally, NEIL provides accidental outage coverage for each station for losses in the event of a major accidental outage at an insured nuclear station.
Pursuant to regulations of the NRC, each company’s property damage insurance policies provide that all proceeds from such insurance be applied, first, to place the plant in a safe and stable condition after a qualifying accident and second, to decontaminate the plant before any proceeds can be used for decommissioning, plant repair or restoration.
Losses resulting from acts of terrorism are covered as common occurrences, such that if terrorist acts occur against one or more commercial nuclear power plants insured by NEIL within a 12-month period, they would be treated as one event and the owners of the plants where the act occurred would share one full limit of liability. The full limit of liability is currently $3.2 billion. NEIL sublimits the total aggregate for all of their policies for non-nuclear terrorist events to approximately $1.83$1.8 billion.
Each nuclear facility has accident property damage, nuclear accident decontamination and premature decommissioning liability insurance from NEIL with limits of $1.5 billion, except for Crystal River Unit 3. Crystal River Unit 3’s limit is $50 million and is on an actual cash value basis. All nuclear facilities except for Catawba and Crystal River Unit 3 also share an additional $1.25 billion nuclear accident insurance limit above their dedicated underlying limit. This shared additional excess limit is not subject to reinstatement in the event of a loss. Catawba has a dedicated $1.25 billion of additional nuclear accident insurance limit above its dedicated underlying limit. Catawba and Oconee also have an additional $750 million of non-nuclear accident property damage limit. All coverages are subject to sublimits and significant deductibles.
NEIL’s Accidental Outage policy provides some coverage, such as business interruption, for losses in the event of a major accident property damage outage of a nuclear unit. Coverage is provided on a weekly limit basis after a significant waiting period deductible and at 100 percent of the available weekly limits for 52 weeks and 80 percent of the available weekly limits for the next 110 weeks. Coverage is provided until these available weekly periods are met where the accidental outage policy limit will not exceed $490 million for McGuire, Catawba and Catawba, $462Harris, $476 million for Brunswick, $448 million for Harris, $434$462 million for Oconee and $378$392 million for Robinson. NEIL sublimits the accidental outage recovery to the first 104 weeks of coverage not to exceed $328 million from non-nuclear accidental property damage. Coverage amounts decrease in the event more than one unit at a station is out of service due to a common accident. All coverages are subject to sublimits and significant deductibles.
Potential Retroactive Premium Assessments
In the event of NEIL losses, NEIL’s board of directors may assess member companies' retroactive premiums of amounts up to 10 times their annual premiums for up to six years after a loss. NEIL has never exercised this assessment. The maximum aggregate annual retrospective premium obligations for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are $146$159 million, $96$97 million and $1 million, respectively. Duke Energy Carolinas' maximum assessment amount includes 100 percent of potential obligations to NEIL for jointly owned reactors. Duke Energy Carolinas would seek reimbursement from the joint owners for their portion of these assessment amounts.
ENVIRONMENTAL
The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. These regulations can be changed from time to time, imposing new obligations on the Duke Energy Registrants. The following environmental matters impact all of the Duke Energy Registrants.

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Combined Notes To Consolidated Financial Statements – (Continued)

Remediation Activities
In addition to the ARO recorded as a result of various environmental regulations, discussed in Note 9, the Duke Energy Registrants are responsible for environmental remediation at various sites. These include certain properties that are part of ongoing operations and sites formerly owned or used by Duke Energy entities. These sites are in various stages of investigation, remediation and monitoring. Managed in conjunction with relevant federal, state and local agencies, remediation activities vary based upon site conditions and location, remediation requirements, complexity and sharing of responsibility. If remediation activities involve joint and several liability provisions, strict liability, or cost recovery or contribution actions, the Duke Energy Registrants could potentially be held responsible for environmental impacts caused by other potentially responsible parties and may also benefit from insurance policies or contractual indemnities that cover some or all cleanup costs. Liabilities are recorded when losses become probable and are reasonably estimable. The total costs that may be incurred cannot be estimated because the extent of environmental impact, allocation among potentially responsible parties, remediation alternatives and/or regulatory decisions have not yet been determined at all sites. Additional costs associated with remediation activities are likely to be incurred in the future and could be significant. Costs are typically expensed as Operation, maintenance and other in the Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


The following tables contain information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Accounts payable within Current Liabilities and Other within Other Noncurrent Liabilities on the Consolidated Balance Sheets.
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Balance at December 31, 2014$92
 $10
 $17
 $5
 $12
 $54
 $10
Provisions/adjustments11
 1
 4
 
 4
 1
 5
Cash reductions(9) (1) (4) (2) (2) (1) (3)
Balance at December 31, 201594
 10
 17
 3
 14
 54
 12
$94
 $10
 $17
 $3
 $14
 $54
 $12
Provisions/adjustments19
 4
 7
 2
 4
 7
 1
19
 4
 7
 2
 4
 7
 1
Cash reductions(15) (4) (6) (2) (4) (2) (3)(15) (4) (6) (2) (4) (2) (3)
Balance at December 31, 201698
 10
 18
 3
 14
 59
 10
98
 10
 18
 3
 14
 59
 10
Provisions/adjustments8
 3
 3
 2
 2
 3
 (4)8
 3
 3
 2
 2
 3
 (4)
Cash reductions(25) (3) (6) (2) (4) (15) (1)(25) (3) (6) (2) (4) (15) (1)
Balance at December 31, 2017$81
 $10
 $15
 $3
 $12
 $47
 $5
81
 10
 15
 3
 12
 47
 5
Provisions/adjustments26
 3
 2
 3
 (2) 21
 1
Cash reductions(30) (2) (6) (2) (4) (20) (1)
Balance at December 31, 2018$77
 $11
 $11
 $4
 $6
 $48
 $5
As of December 31, 2016, and October 31, 2016 2015 and 2014,2015, Piedmont's environmental reserve was $1 million. In 2017, a $1 million provision was recorded, resulting in a reserve balanceAs of $2 million at December 31, 2017.2018, and 2017, the reserve was $2 million.
Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material except as presented in the table below.
(in millions)  
Duke Energy$56
$46
Duke Energy Carolinas19
17
Duke Energy Ohio30
19
Piedmont2
2
North Carolina and South Carolina Ash Basins
In February 2014, a break in a stormwater pipe beneath an ash basin at Duke Energy Carolinas’ retired Dan River Steam Station caused a release of ash basin water and ash into the Dan River. Duke Energy Carolinas estimates 30,000 to 39,000 tons of ash and 24 million to 27 million gallons of basin water were released into the river. In July 2014, Duke Energy completed remediation work identified by the EPA and continues to cooperate with the EPA's civil enforcement process. Future costs related to the Dan River release, including future state or federal civil enforcement proceedings, future regulatory directives, natural resources damages, future claims or litigation and long-term environmental impact costs, cannot be reasonably estimated at this time.
The North Carolina Department of Environmental Quality (NCDEQ)NCDEQ has historically assessed Duke Energy Carolinas and Duke Energy Progress with Notice of Violations (NOV)NOVs for violations that were most often resolved through satisfactory corrective actions and minor, if any, fines or penalties. Subsequent to the Dan River ash release, Duke Energy Carolinas and Duke Energy Progress have been served with a higher level of NOVs, including assessed penalties for violations at L.V. Sutton Combined Cycle Plant (Sutton) and Dan River Steam Station. Duke Energy Carolinas and Duke Energy Progress cannot predict whether the NCDEQ will assess futurecontinue to resolve violations through corrective actions, and associated penalties related to existing unresolved NOVs and if such penalties wouldare not expected to be material. See "NCDEQ Notices of Violation" section below for additional discussion.

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Combined Notes To Consolidated Financial Statements – (Continued)

LITIGATION
Duke Energy
Duke Energy no longer has exposure to litigation matters related to the International Disposal Group as a result of the divestiture of the business in December 2016. See Note 2 for additional information related to the sale of International Energy.
Ash Basin Shareholder Derivative Litigation
Five shareholder derivative lawsuits were filed in Delaware Chancery Court relating to the release at Dan River and to the management of Duke Energy’s ash basins. On October 31, 2014, the five lawsuits were consolidated in a single proceeding titled In Re Duke Energy Corporation Coal Ash Derivative Litigation. On December 2, 2014, plaintiffs filed a Corrected Verified Consolidated Shareholder Derivative Complaint (Consolidated Complaint). The Consolidated Complaint names as defendants several current and former Duke Energy officers and directors (collectively, the “Duke Energy Defendants”). Duke Energy is named as a nominal defendant.
The Consolidated Complaint alleges the Duke Energy Defendants breached their fiduciary duties by failing to adequately oversee Duke Energy’s ash basins and that these breaches of fiduciary duty may have contributed to the incident at Dan River and continued thereafter. The lawsuit also asserts claims against the Duke Energy Defendants for corporate waste (relating to the money Duke Energy has spent and will spend as a result of the fines, penalties and coal ash removal) and unjust enrichment (relating to the compensation and director remuneration that was received despite these alleged breaches of fiduciary duty). The lawsuit seeks both injunctive relief against Duke Energy and restitution from the Duke Energy Defendants. On January 21, 2015, the Duke Energy Defendants filed a Motion to Stay, which the court granted. The stay was lifted on March 24, 2016, after which plaintiffs filed an Amended Verified Consolidated Shareholder Derivative Complaint (Amended Complaint) making the same allegations as in the Consolidated Complaint. The Duke Energy Defendants filed a motion to dismiss the Amended Complaint on June 21, 2016, which was granted by the Court on December 14, 2016. Plaintiffs filed an appeal to the Delaware Supreme Court on January 9, 2017. Oral argument was held on September 27, 2017. On December 15, 2017, the Delaware Supreme Court affirmed the Chancery Court's order of dismissal.
In addition to the above derivative complaints, in 2014, Duke Energy received two shareholder litigation demand letters. The letters alleged that the members of the Board of Directors and certain officers breached their fiduciary duties by allowing the company to illegally dispose of and store coal ash pollutants. One of the letters also alleged a breach of fiduciary duty in the decision-making relating to the leadership changes following the close of the Progress Energy merger in July 2012. By letter dated September 4, 2015, attorneys for the shareholders were informed that, on the recommendation of the Demand Review Committee formed to consider such matters, the Board of Directors concluded not to pursue potential claims against individuals. One of the shareholders, Mitchell Pinsly, sent a formal demand for records and Duke Energy has responded to this request. There was no follow-up after the records were provided; therefore, this matter has been resolved.
On October 30, 2015, shareholder Saul Bresalier filed a shareholder derivative complaint (Bresalier Complaint) in the U.S. District Court for the District of Delaware. The lawsuit alleges that several current and former Duke Energy officers and directors (Bresalier Defendants) breached their fiduciary duties in connection with coal ash environmental issues, the post-merger change in Chief Executive Officer (CEO) and oversight of political contributions. Duke Energy is named as a nominal defendant. The Bresalier Complaint contends that the Demand Review Committee failed to appropriately consider the shareholder’s earlier demand for litigation and improperly decided not to pursue claims against the Bresalier Defendants. On March 30, 2017, the court granted Defendants’ Motion to Dismiss on the claims relating to coal ash environmental issues and political contributions. As discussed below, a settlement agreement was approved for the merger-related claims in the Bresalier Complaint, and those claims were dismissed. On September 8, 2017, Bresalier filed a notice of appeal to the U.S. Court of Appeals for the Third Circuit (Third Circuit Court) challenging the dismissal of his coal ash and political contribution claims. On January 19 2018, Bresalier filed a stipulation of dismissal, closing this case.
Progress Energy Merger Shareholder Litigation
Duke Energy, the 11 members of the Board of Directors who were also members of the pre-merger Board of Directors (Legacy Duke Energy Directors) and certain Duke Energy officers were defendants in a purported securities class-action lawsuit (Nieman v. Duke Energy Corporation, et al). This lawsuit consolidated three lawsuits originally filed in July 2012. The plaintiffs alleged federal Securities Act of 1933 and Securities Exchange Act of 1934 (Exchange Act) claims based on allegations of materially false and misleading representations and omissions in the Registration Statement filed on July 7, 2011, and purportedly incorporated into other documents, all in connection with the post-merger change in CEO. On August 15, 2014, the parties reached an agreement in principle to settle the litigation. On March 10, 2015, the parties filed a Stipulation of Settlement and a Motion for Preliminary Approval of the Settlement. Under the terms of the agreement, Duke Energy agreed to pay $146 million to settle the claim. On April 22, 2015, Duke Energy made a payment of $25 million into the settlement escrow account. The remainder of $121 million was paid by insurers into the settlement escrow account. The final order approving the settlement was issued on November 2, 2015, thus closing the matter.
On May 31, 2013, the Delaware Chancery Court consolidated four shareholder derivative lawsuits filed in 2012. The Court also appointed a lead plaintiff and counsel for plaintiffs and designated the case as In Re Duke Energy Corporation Derivative Litigation (Merger Chancery Litigation). The lawsuit names as defendants the Legacy Duke Energy Directors. Duke Energy is named as a nominal defendant. The case alleges claims for breach of fiduciary duties of loyalty and care in connection with the post-merger change in CEO.
Two shareholder Derivative Complaints, filed in 2012 in federal district court in Delaware, were consolidated as Tansey v. Rogers, et al. The case alleges claims against the Legacy Duke Energy Directors for breach of fiduciary duty and waste of corporate assets, as well as claims under Section 14(a) and 20(a) of the Exchange Act. Duke Energy is named as a nominal defendant. On December 21, 2015, Plaintiff filed a Consolidated Amended Complaint asserting the same claims contained in the original complaints.

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Combined Notes To Consolidated Financial Statements – (Continued)

The Legacy Duke Energy Directors have reached an agreement-in-principle to settle the Merger Chancery Litigation, conditioned on dismissal as well, of the Tansey v. Rogers, et al case and the merger related claims in the Bresalier Complaint discussed above, which was approved by the Delaware Chancery Court on July 13, 2017. The entire settlement amount was funded by insurance. The settlement amount, less court-approved attorney fees, totaled $20 million and was paid to Duke Energy in 2017.
Duke Energy Carolinas and Duke Energy Progress
Coal Ash Insurance Coverage Litigation
In March 2017, Duke Energy Carolinas and Duke Energy Progress filed a civil action in the North Carolina Superior Court against various insurance providers. The lawsuit seeks payment for coal ash-related liabilities covered by third-party liability insurance policies. The insurance policies were issued between 1971 and 1986 and provide third-party liability insurance for property damage. The civil action seeks damages for breach of contract and indemnification for costs arising from the Coal Ash Act and the EPA CCR rule at 15 coal-fired plants in North Carolina and South Carolina. On January 23, 2019, the court granted the parties’ joint motion for a four month stay of the proceedings, until June 3, 2019, to allow the parties to discuss potential resolution. If the case is not fully resolved at that time, litigation will resume. The trial remains scheduled for August 2020. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of this matter.
NCDEQ Notice of Violation
On February 8, 2016, the NCDEQ assessed a penalty of approximately $6.8 million, including enforcement costs, against Duke Energy Carolinas related to stormwater pipes and associated discharges at the Dan River Steam Station. Duke Energy Carolinas recorded a charge in December 2015 for this penalty. In March 2016, Duke Energy Carolinas filed an appeal of this penalty. On September 23, 2016, Duke Energy Carolinas entered into a settlement agreement with the NCDEQ, without admission of liability, under which Duke Energy Carolinas agreed to a payment of $6 million to resolve allegations underlying the asserted civil penalty related to the Dan River coal ash release and a March 4, 2016, NOV alleging unpermitted discharges at the facility.
NCDEQ State Enforcement Actions
In the first quarter of 2013, Southern Environmental Law Center (SELC)SELC sent notices of intent to sue Duke Energy Carolinas and Duke Energy Progress related to alleged Clean Water Act (CWA)CWA violations from coal ash basins at two of their coal-fired power plants in North Carolina. The NCDEQ filed enforcement actions against Duke Energy Carolinas and Duke Energy Progress alleging violations of water discharge permits and North Carolina groundwater standards. The cases have been consolidated and are being heard before a single judge in the North Carolina Superior Court.
On August 16, 2013, the NCDEQ filed an enforcement action against Duke Energy Carolinas and Duke Energy Progress related to theirthe remaining coal-fired power plants in North Carolina, alleging violations of the CWA and violations of the North Carolina groundwater standards. Both of these cases have been assigned to the judge handling the enforcement actions discussed above. SELC is representing several environmental groups who have been permitted to intervene in these cases.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


The court issued orders in 2016 granting Motions for Partial Summary Judgment for seven of the 14 North Carolina plants with coal ash basins named in the enforcement actions. On February 13, 2017, the court issued an order denying motions for partial summary judgment brought by both the environmental groups and Duke Energy Carolinas and Duke Energy Progress for the remaining seven plants. On March 15, 2017, Duke Energy Carolinas and Duke Energy Progress filed a Notice of Appeal with the North Carolina Court of Appeals to challenge the trial court’s order. The parties were unable to reach an agreement at mediation in April 2017. The parties2017 and submitted briefs to the trial court on remaining issues to be tried and a ruling is pending.tried. On August 22, 2017,1, 2018, the Court of Appeals dismissed the appeal and the matter is proceeding before the trial court. No trial date has been scheduled. Duke Energy Carolinas and Duke Energy Progress filed a Petition for Discretionary Review, requestingcannot predict the North Carolina Supreme Court to accept the appeal. On August 24, 2017, SELC filed a motion to dismiss the appeal. Duke Energy Carolinas' and Duke Energy Progress’ opening appellate briefs were filed on October 12, 2017, and briefing is now complete. Argument was held on February 8, 2018.
It is not possible to predict any liability or estimate any damages Duke Energy Carolinas or Duke Energy Progress might incur in connection with these matters.outcome of this matter.
Federal Citizens Suits
On June 13, 2016, the Roanoke River Basin Association (RRBA)RRBA filed a federal citizen suit in the Middle District of North Carolina alleging unpermitted discharges to surface water and groundwater violations at the Mayo Plant. On August 19, 2016, Duke Energy Progress filed a Motion to Dismiss. On April 26, 2017, the court entered an order dismissing four of the claims in the federal citizen suit. Two claims relating to alleged violations of National Pollutant Discharge Elimination System (NPDES)NPDES permit provisions survived the motion to dismiss, and Duke Energy Progress filed its response on May 10, 2017. The parties are engaged in pre-trial discovery. Trial has been scheduled for July 9, 2018.
On March 16, 2017, RRBA served Duke Energy Progress with a Notice of Intent to Sue under the CWAand RRBA each filed motions for alleged violations of effluent standards and limitations at the Roxboro Plant. In anticipation of litigation, Duke Energy Progress filed a Complaint for Declaratory Relief in the U.S. District Court for the Western District of Virginiasummary judgment on May 11, 2017, which was subsequently dismissed. March 23, 2018. The court has not yet ruled on these motions.
On May 16, 2017, RRBA filed a federal citizen suit in the U.S. District Court for the Middle District of North Carolina, which asserts two claims relating to alleged violations of NPDES permit provisions at the Roxboro Plant and one claim relating to the use of nearby water bodies. The parties are engagedDuke Energy Progress and RRBA each filed motions for summary judgment on April 17, 2018, and the court has not yet ruled on these motions.
On May 8, 2018, on motion from Duke Energy Progress, the court ordered trial in pre-trial discovery.both of the above matters to be consolidated. Trial has beenis currently scheduled for October 1, 2018.to begin July 15, 2019.
On June 20, 2017, RRBA filed a federal citizen suit in the U.S. District Court for the Middle District of North Carolina challenging the closure plans at the Mayo Plant under the EPA CCR Rule. Duke Energy Progress filed a motion to dismiss, which was arguedgranted by the court on JanuaryMarch 30, 2018. RRBA had until April 30, 2018, to file an appeal to the Fourth Circuit but did not do so.
On August 2, 2017, RRBA filed a federal citizen suit in the U.S. District Court for the Middle District of North Carolina challenging the closure plans at the Roxboro Plant under the EPA CCR Rule. Duke Energy Progress filed a motion to dismiss on October 2, 2017.2017, which was granted by the court on May 29, 2018. RRBA had until June 28, 2018, to file an appeal to the Fourth Circuit but did not do so.
On December 6,5, 2017, various parties filed a federal citizen suit in the U.S. District Court for the Middle District of North Carolina for alleged violations at Duke Energy Carolinas' Belews Creek Steam Station (Belews Creek) under the CWA. Duke Energy CarolinasCarolinas' answer to the complaint was filed a motion to dismiss on February 5,August 27, 2018.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

It is not possible to predict whether On October 10, 2018, Duke Energy Carolinas orfiled Motions to Dismiss for lack of standing, Motion for Judgment on the Pleadings and Motion to Stay Discovery. On January 9, 2019, the court entered an order denying Duke Energy Carolinas' motion to stay discovery. There has been no ruling on the other pending motions.
Duke Energy Carolinas and Duke Energy Progress will incur any liability or to estimatecannot predict the damages, if any, they might incur in connection withoutcome of these matters.
Five previously filed cases involving the Riverbend, Cape Fear, H.F. Lee, Sutton and Buck plants have been dismissed or settled during 2016.
Groundwater Contamination Claims
Beginning in May 2015, a number of residents living in the vicinity of the North Carolina facilities with ash basins received letters from the NCDEQ advising them not to drink water from the private wells on their land tested by the NCDEQ as the samples were found to have certain substances at levels higher than the criteria set by the North Carolina Department of Health and Human Services (DHHS).DHHS. Results of Comprehensive Site Assessments (CSAs)CSAs testing performed by Duke Energy under the Coal Ash Act have been consistent with historical data provided to state regulators over many years. The DHHS and NCDEQ sent follow-up letters on October 15, 2015, to residents near coal ash basins who have had their wells tested, stating that private well samplings at a considerable distance from coal ash basins, as well as some municipal water supplies, contain similar levels of vanadium and hexavalent chromium, which led investigators to believe these constituents are naturally occurring. In March 2016, DHHS rescinded the advisories.
Duke Energy Carolinas and Duke Energy Progress have received formal demand letters from residents near Duke Energy Carolinas' and Duke Energy Progress' coal ash basins. The residents claim damages for nuisance and diminution in property value, among other things. The parties held three days of mediation discussions, which ended at impasse. On January 6, 2017, Duke Energy Carolinas and Duke Energy Progress received the plaintiffs' notice of their intent to file suits should the matter not settle. The NCDEQ preliminarily approved Duke Energy’s permanent water solution plans on January 13, 2017, and as a result shortly thereafter, Duke Energy issued a press release, providing additional details regarding the homeowner compensation package. This package consists of three components: (i) a $5,000 goodwill payment to each eligible well owner to support the transition to a new water supply, (ii) where a public water supply is available and selected by the eligible well owner, a stipend to cover 25 years of water bills and (iii) the Property Value Protection Plan. The Property Value Protection Plan is a program offered by Duke Energy designed to guarantee eligible plant neighbors the fair market value of their residential property should they decide to sell their property during the time that the plan is offered. Duke Energy CarolinasPayments are being made and Duke Energy Progress recognizedthe remaining reserves of $19 million and $4 million, respectively.are not material.
On August 23, 2017, a class-action suit was filed in Wake County Superior Court, North Carolina, against Duke Energy Carolinas and Duke Energy Progress on behalf of certain property owners living near coal ash impoundments at Allen, Asheville, Belews Creek, Buck, Cliffside, Lee, Marshall, Mayo and Roxboro. The class is defined as those who are well-eligible under the Coal Ash Act or those to whom Duke Energy has promised a permanent replacement water supply and seeks declaratory and injunctive relief, along with compensatory damages. Plaintiffs allege that Duke Energy’s improper maintenance of coal ash impoundments caused harm, particularly through groundwater contamination. Despite NCDEQ’s preliminary approval, Plaintiffs contend that Duke Energy’s proposed permanent water solutions plan fails to comply with the Coal Ash Act. On September 28, 2017, Duke Energy Carolinas and Duke Energy Progress filed a Motion to Dismiss and Motion to Strike the class designation. The parties entered into a Settlement Agreement on January 24, 2018, which resulted in the dismissal of the underlying class action on January 25, 2018.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


On September 14, 2017, a complaint was filed against Duke Energy Progress in New Hanover County Superior Court by a group of homeowners residing approximately 1 mile from Duke Energy Progress' Sutton Steam Plant. The homeowners allege that coal ash constituents have been migrating from ash impoundments at Sutton into their groundwater for decades and that in 2015, Duke Energy Progress discovered these releases of coal ash, but failed to notify any officials or neighbors and failed to take remedial action. The homeowners claim unspecified physical and mental injuries as a result of consuming their well water and seek actual damages for personal injury, medical monitoring and punitive damages. Duke Energy filed its Motion to Dismiss on October 27, 2017, andOn March 6, 2018, Plaintiffs' counsel voluntarily dismissed the hearing is scheduled for March 7, 2018.
It is not possible to estimate the maximum exposure of loss, if any, that may occur in connection with claims which might be made by these residents.action without prejudice.
Duke Energy Carolinas
Asbestos-related Injuries and Damages Claims
Duke Energy Carolinas has experienced numerous claims for indemnification and medical cost reimbursement related to asbestos exposure. These claims relate to damages for bodily injuries alleged to have arisen from exposure to or use of asbestos in connection with construction and maintenance activities conducted on its electric generation plants prior to 1985. As of December 31, 2017,2018, there were 161164 asserted claims for non-malignant cases with the cumulative relief sought of up to $42 million and 5487 asserted claims for malignant cases with the cumulative relief sought of up to $16$21 million. Based on Duke Energy Carolinas’ experience, it is expected that the ultimate resolution of most of these claims likely will be less than the amount claimed.
Duke Energy Carolinas has recognized asbestos-related reserves of $489$630 million and $512$489 million at December 31, 2017,2018, and 2016,2017, respectively. These reserves are classified in Other within Other Noncurrent Liabilities and Other within Current Liabilities on the Consolidated Balance Sheets. These reserves are based upon the minimum amount of the range of lossDuke Energy Carolinas' best estimate for current and future asbestos claims through 2037,2038 and are recorded on an undiscounted basis and incorporate anticipated inflation.basis. In light of the uncertainties inherent in a longer-term forecast, management does not believe they can reasonably estimate the indemnity and medical costs that might be incurred after 20372038 related to such potential claims. It is possible Duke Energy Carolinas may incur asbestos liabilities in excess of the recorded reserves.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. Duke Energy Carolinas’ cumulative payments began to exceed the self-insurance retention in 2008. Future payments up to the policy limit will be reimbursed by the third-party insurance carrier. The insurance policy limit for potential future insurance recoveries indemnification and medical cost claim payments is $797$764 million in excess of the self-insured retention. Receivables for insurance recoveries were $585$739 million and $587$585 million at December 31, 2017,2018, and 2016,2017, respectively. These amounts are classified in Other within Other Noncurrent Assets and Receivables within Current Assets on the Consolidated Balance Sheets. Duke Energy Carolinas is not aware of any uncertainties regarding the legal sufficiency of insurance claims. Duke Energy Carolinas believes the insurance recovery asset is probable of recovery as the insurance carrier continues to have a strong financial strength rating.
Duke Energy Progress and Duke Energy Florida
Spent Nuclear Fuel Matters
On October 16, 2014, Duke Energy Progress and Duke Energy Florida sued the U.S. in the U.S. Court of Federal Claims. The lawsuit claimed the Department of Energy breached a contract in failing to accept spent nuclear fuel under the Nuclear Waste Policy Act of 1982 and asserted damages for the cost of on-site storage. Duke Energy Progress and Duke Energy Florida asserted damages for the period January 1, 2011, through December 31, 2013, of $48 million and $25 million, respectively. On November 17, 2017, the Court awarded Duke Energy Progress and Duke Energy Florida $48 million and $21 million, respectively, subject to appeal. No appeals were filed and Duke Energy Progress and Duke Energy Florida will recognizerecognized the recoveries in the first quarter of 2018. Claims for all periods through 2013 have been resolved. Additional claims will beOn June 22, 2018, Duke Energy Progress and Duke Energy Florida filed ina complaint for damages incurred for 2014 through first quarter 2018.
Duke Energy Progress
Gypsum Supply Agreements Matter
On June 30, 2017, CertainTeed Gypsum NC, Inc. (CertainTeed) filed a declaratory judgment action against Duke Energy Progress in the North Carolina Business Court relating to a gypsum supply agreement. In its complaint, CertainTeed seekssought an order from the court declaring that the minimum amount of gypsum Duke Energy Progress must provide to CertainTeed under the supply agreement iswas 50,000 tons per month through 2029. Trial in this matter was completed on July 16, 2018. On September 28, 2017,August 29, 2018, the Court denied CertainTeed's motioncourt issued an order and opinion finding that Duke Energy Progress is required to supply 50,000 tons of gypsum/month, but that CertainTeed’s sole remedy for summary judgment. DiscoveryDuke Energy Progress’ long-term discontinuance under the agreement is liquidated damages. On November 14, 2018, the parties reached a settlement agreement. The amount owed under the liquidated damages provision is approximately $90 million on an undiscounted basis over 10 years. Approximately $3 million was paid in 2018. As of December 31, 2018, $9 million is recorded in Accounts payable within Current Liabilities and $63 million in Other within Other Noncurrent Liabilities on the Consolidated Balance Sheets. The liability is recorded on a discounted basis at a rate of approximately 4 percent. These costs are probable of recovery from customers and are recorded in Regulatory Assets within Other Noncurrent Assets on the Consolidated Balance Sheets.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


Duke Energy Florida
Fluor Contract Litigation
On January 29, 2019, Fluor filed a breach of contract lawsuit in the case is underway and a trial date has not been set. In lightU.S. District Court for the Middle District of the volatility in future production of gypsum,Florida against Duke Energy ProgressFlorida related to an EPC agreement for the combined-cycle natural gas plant in Citrus County, Florida. Fluor filed an amended complaint on February, 13, 2019. Fluor’s multicount complaint seeks civil, statutory and contractual remedies related to Duke Energy Florida’s $67 million draw in early 2019, on Fluor’s letter of credit and offset of invoiced amounts. Duke Energy Florida is attempting to recover from Fluor $110 million in additional costs incurred by Duke Energy Florida. Duke Energy Florida cannot predict the outcome of this matter.
Duke Energy Florida See Note 4 for additional information.
Class-Action Lawsuit
On February 22, 2016, a lawsuit was filed in the U.S. District Court for the Southern District of Florida on behalf of a putative class of Duke Energy Florida and FP&L’s customers in Florida. The suit alleges the State of Florida’s nuclear power plant cost recovery statutes (NCRS)NCRS are unconstitutional and pre-empted by federal law. Plaintiffs claim they are entitled to repayment of all money paid by customers of Duke Energy Florida and FP&L as a result of the NCRS, as well as an injunction against any future charges under those statutes. The constitutionality of the NCRS has been challenged unsuccessfully in a number of prior cases on alternative grounds. Duke Energy Florida and FP&L filed motions to dismiss the complaint on May 5, 2016. On September 21, 2016, the Court granted the motions to dismiss with prejudice. Plaintiffs filed a motion for reconsideration, which was denied. On January 4, 2017, plaintiffs filed a notice of appeal to the Eleventh Circuit U.S. Court of Appeals.Appeals (Eleventh Circuit). On July 11, 2018, the Eleventh Circuit affirmed the U.S. District Court's dismissal of the lawsuit. The appeal, which has been fully briefed,deadline to file a petition for cert was heard on August 22, 2017,October 9, 2018, and a decisionno petition was filed; therefore, the dismissal of the lawsuit is pending. Duke Energy Florida cannot predict the outcome of this appeal.final.
Westinghouse Contract Litigation
On March 28, 2014, Duke Energy Florida filed a lawsuit against Westinghouse in the U.S. District Court for the Western District of North Carolina. The lawsuit seeks recovery of $54 million in milestone payments in excess of work performed under the terminatedan EPC for Levy as well as a determination by the court of the amounts due to Westinghouse as a result of the termination of the EPC.an EPC contract. Duke Energy Florida recognized an exit obligation as a result of the termination of the EPC contract.
EPC. On March 31, 2014, Westinghouse filed a separate lawsuit against Duke Energy Florida in U.S. District Court for the Western District of Pennsylvania. The Pennsylvania lawsuit allegedalleging damages under the same EPC contract in excess of $510 million for engineering and design work, costs to end supplier contracts and an alleged termination fee.
On June 9, 2014, the judge in the North Carolina case ruled that the litigation will proceed in the Western District of North Carolina.
On July 11, 2016, Duke Energy Florida and Westinghouse filed separate Motions for Summary Judgment. On September 29, 2016, the court issued its ruling, on the parties' respective Motions for Summary Judgment, ruling in favor ofgranting Westinghouse on a $30 million termination fee claim and dismissing Duke Energy Florida's $54 million refund claim, but stating that Duke Energy Florida could use the refund claim to offset any damages for termination costs.claim. Westinghouse's claim for termination costs was unaffected by this ruling and continued to trial. At trial, Westinghouse reduced its claim for termination costs from $482 million to $424 million. Following a trial on the matter, the court issued its finalan order in December 2016 denying Westinghouse’s claim for termination costs and re-affirmingreaffirming its earlier ruling in favor of Westinghouse on the $30 million termination fee and Duke Energy Florida’s refund claim.fee. Judgment was entered against Duke Energy Florida in the amount of approximately $34 million, which includes pre-judgmentprejudgment interest. Westinghouse has appealed the trial court's order to the Fourth Circuit and Duke Energy Florida has cross-appealed. Duke Energy Florida cannot predict the ultimate outcome of the appeal of the trial court's order.
On March 29, 2017, Westinghouse filed Chapter 11 bankruptcy in the Southern District of New York, which automatically stayed the appeal. On May 23, 2017, the bankruptcy court entered an order lifting the stay with respect to the appeal. BriefingWestinghouse and Duke Energy Florida executed a settlement agreement resolving this matter on April 5, 2018. The bankruptcy court approved the settlement and Duke Energy Florida paid approximately $34 million to Westinghouse in July 2018 pursuant to this agreement. At the request of the appeal concluded on October 20, 2017. Oral argument inparties, the appeal was originally set for March 2018 butFourth Circuit has tentatively been rescheduled to May 2018, due to scheduling conflicts.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Ultimate resolution of these matters could have a material effect ondismissed the results of operations, financial position or cash flows of Duke Energy Florida. See discussion of the 2017 Settlement and the Levy Nuclear Project in Note 4 for additional information regarding recovery of costs related to Westinghouse. The 2017 Settlement does not permit recovery of any amounts paid to resolve this contract litigation.appeal.
MGP Cost Recovery Action
On December 30, 2011, Duke Energy Florida filed a lawsuit against FirstEnergy Corp. (FirstEnergy) to recover investigation and remediation costs incurred by Duke Energy Florida in connection with the restoration of two former MGP sites in Florida. Duke Energy Florida alleged that FirstEnergy, as the successor to Associated Gas & Electric Co., owes past and future contribution and response costs of up to $43 million for the investigation and remediation of MGP sites. On December 6, 2016, the trial court entered judgment against Duke Energy Florida in the case. In January 2017, Duke Energy Florida appealed the decision to the U.S. Court of Appeals for the Sixth Circuit, which has been fully briefed and argued. Duke Energy Florida cannot predictaffirmed the outcome of this appeal.
Duke Energy Ohio
Antitrust Lawsuit
In January 2008, four plaintiffs, including individual, industrial and nonprofit customers, filed a lawsuit against Duke Energy Ohio in federal court in the Southern District of Ohio. Plaintiffs alleged Duke Energy Ohio conspired to provide inequitable and unfair price advantages for certain large business consumers by entering into nonpublic option agreements in exchange for their withdrawal of challenges to Duke Energy Ohio’s Rate Stabilization Plan implemented in early 2005. In March 2014, a federal judge certified this matter as a class action. Plaintiffs alleged claims of antitrust violations under the federal Robinson Patman Act as well as fraud and conspiracy allegations under the federal Racketeer Influenced and Corrupt Organizations statute and the Ohio Corrupt Practices Act.
During 2015, the parties received preliminary court approval of a settlement agreement. Duke Energy Ohio recorded a litigation settlement reserve of $81 million classified in Other within Current Liabilities on the Consolidated Balance Sheet at December 31, 2015. Duke Energy Ohio also recognized a pretax charge of $81 million in (Loss) Income From Discontinued Operations, net of tax in the Consolidated Statements of Operations and Comprehensive Income for the year ended December 31, 2015. The settlement agreement was approved at a federal court hearingtrial court's ruling on April 19, 2016. Distribution10, 2018. The dismissal of the settlement checks was approved by the court in January 2017 and all settlement amounts have been paid. See Note 2 for further discussion on the Midwest Generation Exit.lawsuit is therefore final.
Other Litigation and Legal Proceedings
The Duke Energy Registrants are involved in other legal, tax and regulatory proceedings arising in the ordinary course of business, some of which involve significant amounts. The Duke Energy Registrants believe the final disposition of these proceedings will not have a material effect on their results of operations, cash flows or financial position.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


The table below presents recorded reserves based on management’s best estimate of probable loss for legal matters, excluding asbestos-related reserves, the CertainTeed liquidated damages obligation and the exit obligation discussed abovein 2017 related to the termination of an EPC contract. Reserves are classified on the Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Accounts payable and Other within Current Liabilities. The reasonably possible range of loss in excess of recorded reserves is not material, other than as described above.
December 31,December 31,
(in millions)
2017
 2016
2018
 2017
Reserves for Legal Matters      
Duke Energy$88
 $98
$65
 $88
Duke Energy Carolinas30
 23
9
 30
Progress Energy55
 59
54
 55
Duke Energy Progress13
 14
12
 13
Duke Energy Florida24
 28
24
 24
Duke Energy Ohio
 4
Piedmont2
 2
1
 2
OTHER COMMITMENTS AND CONTINGENCIES
General
As part of their normal business, the Duke Energy Registrants are party to various financial guarantees, performance guarantees and other contractual commitments to extend guarantees of credit and other assistance to various subsidiaries, investees and other third parties. These guarantees involve elements of performance and credit risk, which are not fully recognized on the Consolidated Balance Sheets and have unlimited maximum potential payments. However, the Duke Energy Registrants do not believe these guarantees will have a material effect on their results of operations, cash flows or financial position.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Purchase Obligations
Purchased Power
Duke Energy Progress, Duke Energy Florida and Duke Energy Ohio have ongoing purchased power contracts, including renewable energy contracts, with other utilities, wholesale marketers, co-generators and qualified facilities. These purchased power contracts generally provide for capacity and energy payments. In addition, Duke Energy Progress and Duke Energy Florida have various contracts to secure transmission rights.
The following table presents executory purchased power contracts with terms exceeding one year, excluding contracts classified as leases. Amounts at Duke Energy Ohio were immaterial.
  Minimum Purchase Amount at December 31, 2017  Minimum Purchase Amount at December 31, 2018
Contract              Contract              
(in millions)Expiration 2018
 2019
 2020
 2021
 2022
 Thereafter
 Total
Expiration 2019
 2020
 2021
 2022
 2023
 Thereafter
 Total
Duke Energy Progress(a)
2019-2031 $68
 $68
 $51
 $52
 $30
 $239
 $508
2022-2031 $51
 $52
 $53
 $30
 $25
 $215
 $426
Duke Energy Florida(b)
2021-2043 357
 374
 394
 378
 376
 770
 2,649
2021-2025 363
 380
 365
 363
 382
 361
 2,214
Duke Energy Ohio(c)(d)
2020-2022 146
 117
 53
 11
 
 
 327
(a)    Contracts represent between 15 percent and 100 percent of net plant output.
(b)     Contracts represent between 81 percent and 100 percent of net plant output.
(a)Contracts represent 100 percent of net plant output.
(b)Contracts represent between 81 percent and 100 percent of net plant output.
(c)Contracts represent between 1 percent and 8 percent of net plant output.
(d)Excludes PPA with OVEC. See Note 17 for additional information.
Gas Supply and Capacity Contracts
Duke Energy Ohio and Piedmont routinely enter into long-term natural gas supply commodity and capacity commitments and other agreements that commit future cash flows to acquire services needed in their businesses. These commitments include pipeline and storage capacity contracts and natural gas supply contracts to provide service to customers. Costs arising from the natural gas supply commodity and capacity commitments, while significant, are pass-through costs to customers and are generally fully recoverable through the fuel adjustment or PGA procedures and prudence reviews in North Carolina and South Carolina and under the Tennessee Incentive Plan in Tennessee. In the Midwest, these costs are recovered via the Gas Cost Recovery Rate in Ohio or the Gas Cost Adjustment Clause in Kentucky. The time periods for fixed payments under pipeline and storage capacity contracts are up to 1916 years. The time periods for fixed payments under natural gas supply contracts are up to threeseven years. The time period for the natural gas supply purchase commitments is up to 1512 years.
Certain storage and pipeline capacity contracts require the payment of demand charges that are based on rates approved by the FERC in order to maintain rights to access the natural gas storage or pipeline capacity on a firm basis during the contract term. The demand charges that are incurred in each period are recognized in the Consolidated Statements of Operations and Comprehensive Income as part of natural gas purchases and are included in Cost of natural gas.



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


The following table presents future unconditional purchase obligations under natural gas supply and capacity contracts as of December 31, 2017.2018.
(in millions)Duke EnergyDuke Energy OhioPiedmontDuke EnergyDuke Energy OhioPiedmont
2018$314
$37
$277
2019280
28
252
$314
$38
$276
2020252
25
227
287
30
257
2021249
26
223
255
29
226
2022226
11
215
225
11
214
2023148
4
144
Thereafter1,121
3
1,118
1,067

1,067
Total$2,442
$130
$2,312
$2,296
$112
$2,184
Operating and Capital Lease Commitments
The Duke Energy Registrants lease office buildings, railcars, vehicles computer equipment and other property and equipment with various terms and expiration dates. Additionally, Duke Energy Carolinas and Duke Energy Progress has ahave capital leaseleases related to firm natural gas pipeline transportation capacity. Duke Energy Progress and Duke Energy Florida have entered into certain purchased power agreements, which are classified as leases. Consolidated capitalized lease obligations are classified as Long-Term Debt or Other within Current Liabilities on the Consolidated Balance Sheets. Amortization of assets recorded under capital leases is included in Depreciation and amortization and Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following tables present rental expense for operating leases. These amounts are included in Operation, maintenance and other and Fuel used in electric generation and purchased power on the Consolidated Statements of Operations.
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Duke Energy$241
 $242
 $313
$268
 $241
 $242
Duke Energy Carolinas44
 45
 41
49
 44
 45
Progress Energy130
 140
 230
143
 130
 140
Duke Energy Progress75
 68
 149
75
 75
 68
Duke Energy Florida55
 72
 81
68
 55
 72
Duke Energy Ohio15
 16
 13
13
 15
 16
Duke Energy Indiana23
 23
 20
21
 23
 23
Year Ended Two Months Ended Years Ended October 31,Years Ended December 31,Two Months Ended December 31, Year Ended October 31,
(in millions)December 31, 2017 December 31, 2016 2016
 2015
2018 20172016 2016
Piedmont$7
 $1
 $5
 $5
$11
 $7
$1
 $5
The following table presents future minimum lease payments under operating leases, which at inception had a non-cancelable term of more than one year.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
   Duke
   Duke
 Duke
 Duke
 Duke
 
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
 
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Piedmont
2018$233
 $36
 $133
 $77
 $56
 $20
 $22
$6
2019203
 29
 126
 72
 54
 12
 14
5
$239
 $33
 $97
 $49
 $48
 $2
 $6
$5
2020183
 25
 117
 62
 55
 10
 10
5
219
 29
 90
 46
 44
 2
 5
5
2021150
 19
 97
 48
 49
 7
 8
6
186
 19
 79
 37
 42
 2
 4
5
2022135
 16
 90
 42
 48
 4
 5
6
170
 19
 76
 34
 42
 2
 4
5
2023160
 17
 77
 35
 42
 2
 5
6
Thereafter882
 52
 525
 344
 181
 5
 7
16
1,017
 68
 455
 314
 141
 23
 66
11
Total$1,786
 $177
 $1,088
 $645
 $443
 $58
 $66
$44
$1,991
 $185
 $874
 $515
 $359
 $33
 $90
$37



FINANCIAL STATEMENTSCOMMITMENTS AND CONTINGENCIES


The following table presents future minimum lease payments under capital leases.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
2018$168
 $13
 $46
 $21
 $25
 $3
 $2
2019169
 13
 45
 20
 25
 1
 1
$170
 $20
 $45
 $20
 $25
 $2
 $1
2020174
 13
 47
 21
 26
 
 1
174
 20
 46
 21
 25
 
 1
2021176
 8
 45
 22
 25
 
 1
177
 15
 45
 20
 25
 
 1
2022169
 8
 45
 21
 24
 
 1
165
 15
 45
 21
 24
 
 1
2023165
 15
 45
 21
 24
 
 1
Thereafter745
 109
 323
 227
 95
 
 38
577
 204
 230
 209
 21
 
 27
Minimum annual payments1,601
 164
 551
 332
 220
 4
 44
1,428
 289
 456
 312
 144
 2
 32
Less: amount representing interest(601) (103) (283) (192) (91) 
 (33)(487) (180) (205) (175) (30) 
 (22)
Total$1,000
 $61
 $268
 $140
 $129
 $4
 $11
$941
 $109
 $251
 $137
 $114
 $2
 $10

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DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

6. DEBT AND CREDIT FACILITIES
Summary of Debt and Related Terms
The following tables summarize outstanding debt.
 December 31, 2018
 Weighted
         
 Average
  Duke
 Duke
Duke
Duke
Duke
 
 Interest
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Rate
 Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Unsecured debt, maturing 2019-20784.26% $20,955
$1,150
$3,800
$50
$350
$1,000
$408
$2,150
Secured debt, maturing 2020-20373.69% 4,297
450
1,703
300
1,403



First mortgage bonds, maturing 2019-2048(a)
4.32% 25,628
8,759
13,100
7,574
5,526
1,099
2,670

Capital leases, maturing 2019-2051(b)
5.06% 941
109
251
137
114
2
10

Tax-exempt bonds, maturing 2019-2041(c)
3.40% 941
243
48
48

77
572

Notes payable and commercial paper(d)
2.73% 4,035







Money pool/intercompany borrowings  
739
1,385
444
108
299
317
198
Fair value hedge carrying value adjustment  5
5






Unamortized debt discount and premium, net(e)
  1,434
(23)(29)(15)(11)(31)(8)(1)
Unamortized debt issuance costs(f)
  (297)(54)(112)(40)(61)(7)(20)(11)
Total debt4.13% $57,939
$11,378
$20,146
$8,498
$7,429
$2,439
$3,949
$2,336
Short-term notes payable and commercial paper  (3,410)






Short-term money pool/intercompany borrowings  
(439)(1,235)(294)(108)(274)(167)(198)
Current maturities of long-term debt(g)
  (3,406)(6)(1,672)(603)(270)(551)(63)(350)
Total long-term debt(g)

 $51,123
$10,933
$17,239
$7,601
$7,051
$1,614
$3,719
$1,788



FINANCIAL STATEMENTSDEBT AND CREDIT FACILITIES


(a)Substantially all electric utility property is mortgaged under mortgage bond indentures.
(b)Duke Energy includes $63 million and $531 million of capital lease purchase accounting adjustments related to Duke Energy Progress and Duke Energy Florida, respectively, related to power purchase agreements that are not accounted for as capital leases in their respective financial statements because of grandfathering provisions in GAAP.
(c)Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility.
(d)Includes $625 million that was classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper program was 16 days.
(e)Duke Energy includes $1,380 million and $156 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively.
(f)Duke Energy includes $41 million in purchase accounting adjustments primarily related to the merger with Progress Energy.
(g)Refer to Note 17 for additional information on amounts from consolidated VIEs.
 December 31, 2017
 Weighted
         
 Average
  Duke
 Duke
Duke
Duke
Duke
 
 Interest
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Rate
 Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Unsecured debt, maturing 2018-20734.17% $20,409
$1,150
$3,950
$
$550
$900
$411
$2,050
Secured debt, maturing 2018-20373.15% 4,458
450
1,757
300
1,457



First mortgage bonds, maturing 2018-2047(a)
4.51% 23,529
7,959
11,801
6,776
5,025
1,100
2,669

Capital leases, maturing 2018-2051(b)
4.55% 1,000
61
269
139
129
5
11

Tax-exempt bonds, maturing 2019-2041(c)
3.23% 941
243
48
48

77
572

Notes payable and commercial paper(d)
1.57% 2,788







Money pool/intercompany borrowings  
404
955
390

54
311
364
Fair value hedge carrying value adjustment  6
6






Unamortized debt discount and premium, net(e)
  1,582
(19)(30)(16)(10)(33)(9)(1)
Unamortized debt issuance costs(f)
  (271)(47)(108)(40)(56)(7)(21)(12)
Total debt4.09% $54,442
$10,207
$18,642
$7,597
$7,095
$2,096
$3,944
$2,401
Short-term notes payable and commercial paper  (2,163)






Short-term money pool/intercompany borrowings  
(104)(805)(240)
(29)(161)(364)
Current maturities of long-term debt(g)
  (3,244)(1,205)(771)(3)(768)(3)(3)(250)
Total long-term debt(g)

 $49,035
$8,898
$17,066
$7,354
$6,327
$2,064
$3,780
$1,787
(a)Substantially all electric utility property is mortgaged under mortgage bond indentures.
(b)Duke Energy includes $81 million and $603 million of capital lease purchase accounting adjustments related to Duke Energy Progress and Duke Energy Florida, respectively, related to power purchase agreements that are not accounted for as capital leases in their respective financial statements because of grandfathering provisions in GAAP.
(c)Substantially all tax-exempt bonds are secured by first mortgage bonds, or letters of credit.credit or the Master Credit Facility.
(d)Includes $625 million that was classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper programprograms was 14 days.
(e)Duke Energy includes $1,509 million and $176 million in purchase accounting adjustments related to the mergers with Progress Energy and Piedmont, respectively.
(f)Duke Energy includes $47 million in purchase accounting adjustments primarily related to the merger with Progress Energy.
(g)Refer to Note 17 for additional information on amounts from consolidated VIEs.

175

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)


 December 31, 2016
 Weighted
         
 Average
  Duke
 Duke
Duke
Duke
Duke
 
 Interest
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Rate
 Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Unsecured debt, maturing 2017-20734.30% $17,812
$1,150
$3,551
$
$150
$810
$415
$1,835
Secured debt, maturing 2017-20372.60% 3,909
425
1,819
300
1,519



First mortgage bonds, maturing 2017-2046(a)
4.61% 21,879
7,410
10,800
6,425
4,375
1,000
2,669

Capital leases, maturing 2018-2051(b)
4.48% 1,100
22
285
142
143
7
11

Tax-exempt bonds, maturing 2017-2041(c)
2.84% 1,053
355
48
48

77
572

Notes payable and commercial paper(d)
1.01% 3,112







Money pool/intercompany borrowings(e)
  
300
1,902
150
297
41
150

Fair value hedge carrying value adjustment  6
6






Unamortized debt discount and premium, net(f)
  1,753
(20)(31)(16)(10)(28)(9)(1)
Unamortized debt issuance costs(g)
  (242)(45)(104)(38)(52)(7)(22)(13)
Total debt4.07% $50,382
$9,603
$18,270
$7,011
$6,422
$1,900
$3,786
$1,821
Short-term notes payable and commercial paper  (2,487)






Short-term money pool/intercompany borrowings  

(729)
(297)(16)

Current maturities of long-term debt(h)
  (2,319)(116)(778)(452)(326)(1)(3)(35)
Total long-term debt(h)

 $45,576
$9,487
$16,763
$6,559
$5,799
$1,883
$3,783
$1,786
(a)FINANCIAL STATEMENTSSubstantially all electric utility property is mortgaged under mortgage bond indentures.DEBT AND CREDIT FACILITIES
(b)Duke Energy includes $98 million and $670 million of capital lease purchase accounting adjustments related to Duke Energy Progress and Duke Energy Florida, respectively, related to power purchase agreements that are not accounted for as capital leases in their respective financial statements because of grandfathering provisions in GAAP.
(c)Substantially all tax-exempt bonds are secured by first mortgage bonds or letters of credit.
(d)Includes $625 million that was classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy and Piedmont's commercial paper programs were 14 days and eight days, respectively.
(e)Progress Energy amount includes a $1 billion intercompany loan related to the sale of the International Disposal Group. See Note 2 for further discussion of the sale.
(f)Duke Energy includes $1,653 million and $197 million purchase accounting adjustments related to the mergers with Progress Energy and Piedmont, respectively.
(g)Duke Energy includes $53 million in purchase accounting adjustments primarily related to the merger with Progress Energy.
(h)Refer to Note 17 for additional information on amounts from consolidated VIEs.


Current Maturities of Long-Term Debt
The following table shows the significant components of Current maturities of Long-Term Debt on the Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings.
(in millions)Maturity Date Interest Rate
 December 31, 2017
Unsecured Debt     
Duke Energy (Parent)June 2018 6.250% $250
Duke Energy (Parent)June 2018 2.100% 500
PiedmontDecember 2018 2.286%
(b) 
250
First Mortgage Bonds     
Duke Energy CarolinasJanuary 2018 5.250% 400
Duke Energy CarolinasApril 2018 5.100% 300
Duke Energy FloridaJune 2018 5.650% 500
Duke Energy CarolinasNovember 2018 7.000% 500
Other(a)
    544
Current maturities of long-term debt    $3,244

176

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

(in millions)Maturity Date Interest Rate
 December 31, 2018
Unsecured Debt     
Progress EnergyMarch 2019 7.050% $450
Duke Energy (Parent)September 2019 5.050% 500
PiedmontSeptember 2019 3.155%
(b) 
350
Duke Energy KentuckyOctober 2019 4.65% 100
Progress EnergyDecember 2019 4.875% 350
First Mortgage Bonds     
Duke Energy ProgressJanuary 2019 5.300% 600
Duke Energy OhioApril 2019 5.450% 450
Other(a)
    606
Current maturities of long-term debt    $3,406
(a)Includes capital lease obligations, amortizing debt and small bullet maturities.
(b)Debt has a floating interest rate.
Maturities and Call Options
The following table shows the annual maturities of long-term debt for the next five years and thereafter. Amounts presented exclude short-term notes payable and commercial paper and money pool borrowings for the Subsidiary Registrants.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)
Energy(a)

 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy(a)

 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
2018$3,244
 $1,205
 $771
 $3
 $768
 $3
 $3
 $250
20193,563
 6
 2,191
 903
 490
 548
 61
 
$3,408
 $6
 $1,674
 $603
 $270
 552
 $63
 $350
20203,699
 906
 871
 304
 568
 
 502
 
3,765
 907
 926
 354
 572
 
 503
 
20213,760
 502
 1,472
 602
 371
 48
 69
 159
4,803
 503
 2,004
 904
 600
 50
 70
 160
20223,010
 302
 1,176
 653
 74
 23
 243
 
2,745
 353
 1,032
 505
 77
 
 94
 
20233,375
 1,303
 535
 456
 79
 350
 153
 45
Thereafter33,271
 7,182
 11,356
 4,892
 4,824
 1,445
 2,905
 1,628
35,288
 7,940
 12,880
 5,437
 5,793
 1,251
 2,925
 1,595
Total long-term debt, including current maturities$50,547

$10,103

$17,837

$7,357

$7,095

$2,067

$3,783
 $2,037
$53,384

$11,012

$19,051

$8,259

$7,391

$2,203

$3,808
 $2,150
(a)Excludes $1,732$1,578 million in purchase accounting adjustments related to the Progress Energy merger and the Piedmont acquisition.
The Duke Energy Registrants have the ability under certain debt facilities to call and repay the obligation prior to its scheduled maturity. Therefore, the actual timing of future cash repayments could be materially different than as presented above.



FINANCIAL STATEMENTSDEBT AND CREDIT FACILITIES


Short-Term Obligations Classified as Long-Term Debt
Tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder and certain commercial paper issuances and money pool borrowings are classified as Long-Term Debt on the Consolidated Balance Sheets. These tax-exempt bonds, commercial paper issuances and money pool borrowings, which are short-term obligations by nature, are classified as long term due to Duke Energy’s intent and ability to utilize such borrowings as long-term financing. As Duke Energy’s Master Credit Facility and other bilateral letter of credit agreements have non-cancelable terms in excess of one year as of the balance sheet date, Duke Energy has the ability to refinance these short-term obligations on a long-term basis. The following tables show short-term obligations classified as long-term debt.
December 31, 2017December 31, 2018
  Duke
 Duke
 Duke
 Duke
  Duke
 Duke
 Duke
 Duke
Duke
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Progress
 Ohio
 Indiana
Energy
 Carolinas
 Progress
 Ohio
 Indiana
Tax-exempt bonds$312
 $
 $
 $27
 $285
$312
 $
 $
 $27
 $285
Commercial paper(a)
625
 300
 150
 25
 150
625
 300
 150
 25
 150
Total$937

$300
 $150

$52

$435
$937

$300
 $150

$52

$435
December 31, 2016December 31, 2017
  Duke
 Duke
 Duke
 Duke
  Duke
 Duke
 Duke
 Duke
Duke
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Progress
 Ohio
 Indiana
Energy
 Carolinas
 Progress
 Ohio
 Indiana
Tax-exempt bonds$347
 $35
 $
 $27
 $285
$312
 $
 $
 $27
 $285
Commercial paper(a)
625
 300
 150
 25
 150
625
 300
 150
 25
 150
Total$972

$335

$150
 $52

$435
$937

$300

$150
 $52

$435
(a)Progress Energy amounts are equal to Duke Energy Progress amounts.



177

PART II
FINANCIAL STATEMENTSDEBT AND CREDIT FACILITIES
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Summary of Significant Debt Issuances
In January 2019, Duke Energy Ohio issued $800 million of first mortgage bonds. The issuance was split between a $400 million, 10-year tranche at 3.65 percent and a $400 million, 30-year tranche at 4.30 percent. The net proceeds will be used to refinance $450 million of Duke Energy Ohio bonds maturing in April 2019, to pay down short-term debt and for general corporate purposes.
The following tables summarize significant debt issuances (in millions).
     Year Ended December 31, 2017
       Duke
 Duke
 Duke
 Duke
 Duke
 Maturity Interest
 Duke
 Energy
 Energy
 Energy
 Energy
 Energy
Issuance DateDate Rate
 Energy
 (Parent)
 Carolinas
 Progress
 Florida
 Ohio
Unsecured Debt               
April 2017(a)
April 2025 3.364% $420
 $420
 $
 $
 $
 $
June 2017(b)
June 2020 2.100% 330
 330
 
 
 
 
August 2017(c)
August 2022 2.400% 500
 500
 
 
 
 
August 2017(c)
August 2027 3.150% 750
 750
 
 
 
 
August 2017(c)
August 2047 3.950% 500
 500
 
 
 
 
December 2017(d)
December 2019
(k) 
2.100% 400
 
 
 
 400
 
Secured Debt  

 

 

 

 

 

  
February 2017(e)
June 2034 4.120% 587
 
 
 
 
 
August 2017(f)
December 2036 4.110% 233
 
 
 
 
 
First Mortgage Bonds  
 

       
  
January 2017(g)
January 2020 1.850% 250
 
 
 
 250
 
January 2017(g)
January 2027 3.200% 650
 
 
 
 650
 
March 2017(h)
June 2046 3.700% 100
 
 
 
 
 100
September 2017(i)
September 2020 1.500%
(l) 
300
 
 
 300
 
 
September 2017(i)
September 2047 3.600% 500
 
 
 500
 
 
November 2017(j)
December 2047 3.700% 550
 
 550
 
 
 
Total issuances    $6,070
 $2,500

$550
 $800
 $1,300
 $100
     Year Ended December 31, 2018
       Duke
 Duke
 Duke
 Duke
 Maturity Interest
 Duke
 Energy
 Energy
 Energy
 Energy
Issuance DateDate Rate
 Energy
 (Parent)
 Carolinas
 Progress
 Florida
Unsecured Debt             
March 2018(a)
April 2025 3.950% $250
 $250
 $
 $
 $
May 2018(b)
May 2021 3.114% 500
 500
 
 
 
September 2018(c)
September 2078 5.625% 500
 500
 
 
 
First Mortgage Bonds  
 

       
March 2018(d)
March 2023 3.050% 500
 
 500
 
 
March 2018(d)
March 2048 3.950% 500
 
 500
 
 
June 2018(e)
July 2028 3.800% 600
 
 
 
 600
June 2018(e)
July 2048 4.200%
400
 
 
 
 400
August 2018(f)
September 2023 3.375% 300
 
 
 300
 
August 2018(f)
September 2028 3.700% 500
 
 
 500
 
November 2018(g)
May 2022 3.350% 350
 
 350
 
 
November 2018(g)
November 2028 3.950% 650
 
 650
 
 
Total issuances    $5,050
 $1,250

$2,000
 $800
 $1,000
(a)Debt issued to pay down short-term debt.
(b)Debt issued to pay down short-term debt. Debt issuance has a floating debt rate.
(c)Callable after September 2023 at par. Junior subordinated hybrid debt issued to pay down short-term debt and for general corporate
purposes.
(d)
Debt issued to repay at maturity a $300 million first mortgage bond due April 2018, pay down intercompany short-term debt and for general corporate purposes.
(e)Debt issued to repay a portion of intercompany short-term debt under the money pool borrowing arrangement and for general corporate purposes.
(f)Debt issued to repay short-term debt and for general corporate purposes.
(g)Debt issued to fund eligible green energy projects, including zero-carbon solar and energy storage, in the Carolinas.



FINANCIAL STATEMENTSDEBT AND CREDIT FACILITIES


     Year Ended December 31, 2017
       Duke
 Duke
 Duke
 Duke
 Duke
 Maturity Interest
 Duke
 Energy
 Energy
 Energy
 Energy
 Energy
Issuance DateDate Rate
 Energy
 (Parent)
 Carolinas
 Progress
 Florida
 Ohio
Unsecured Debt               
April 2017(a)
April 2025 3.364% $420
 $420
 $
 $
 $
 $
June 2017(b)
June 2020 2.100% 330
 330
 
 
 
 
August 2017(c)
August 2022 2.400% 500
 500
 
 
 
 
August 2017(c)
August 2027 3.150% 750
 750
 
 
 
 
August 2017(c)
August 2047 3.950% 500
 500
 
 
 
 
December 2017(d)
December 2019
(k) 
2.100% 400
 
 
 
 400
 
Secured Debt    

         

February 2017(e)
June 2034 4.120% 587
 
 
 
 
 
August 2017(f)
December 2036 4.110% 233
 
 
 
 
 
First Mortgage Bonds              

January 2017(g)
January 2020 1.850% 250
 
 
 
 250
 
January 2017(g)
January 2027 3.200% 650
 
 
 
 650
 
March 2017(h)
June 2046 3.700% 100
 
 
 
 
 100
September 2017(i)
September 2020 1.500%
(l) 
300
 
 
 300
 
 
September 2017(i)
September 2047 3.600% 500
 
 
 500
 
 
November 2017(j)
December 2047 3.700% 550
 
 550
 
 
 
Total issuances    $6,070
 $2,500

$550
 $800

$1,300

$100
(a)Proceeds were used to refinance $400 million of unsecured debt at maturity and to repay a portion of outstanding commercial paper.
(b)Debt issued to repay a portion of outstanding commercial paper.
(c)Debt issued to repay at maturity $700 million of unsecured debt, to repay outstanding commercial paper and for general corporate purposes.
(d)Debt issued to fund storm restoration costs related to Hurricane Irma and for general corporate purposes.
(e)Portfolio financing of four Texas and Oklahoma wind facilities. Duke Energy pledged substantially all of the assets of these wind facilities and is nonrecourse to Duke Energy. Proceeds were used to reimburse Duke Energy for a portion of previously funded construction expenditures.
(f)Portfolio financing of eight solar facilities located in California, Colorado and New Mexico. Duke Energy pledged substantially all of the assets of these solar facilities and is nonrecourse to Duke Energy. Proceeds were used to reimburse Duke Energy for a portion of previously funded construction expenditures.
(g)Debt issued to fund capital expenditures for ongoing construction and capital maintenance, to repay a $250 million aggregate principal amount of bonds at maturity and for general corporate purposes.
(h)Proceeds were used to fund capital expenditures for ongoing construction, capital maintenance and for general corporate purposes.
(i)Debt issued to repay at maturity a $200 million aggregate principal amount of bonds at maturity, pay down intercompany short-term debt and for general corporate purposes, including capital expenditures.
(j)Debt issued to refinance $400 million aggregate principal amount of bonds due January 2018, pay down intercompany short-term debt and for general corporate purposes.
(k)Principal balance will be repaid in equal quarterly installments beginning in March 2018.
(l)Debt issuance has a floating interest rate.

178

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

     Year Ended December 31, 2016
       Duke
 Duke
 Duke
 Duke
 Duke
 Duke
 Maturity Interest
 Duke
 Energy
 Energy
 Energy
 Energy
 Energy
 Energy
Issuance DateDate Rate
 Energy
 (Parent)
 Carolinas
 Progress
 Florida
 Ohio
 Indiana
Unsecured Debt                 
April 2016(a)
April 2023 2.875% $350
 $350
 $
 $
 $
 $
 $
August 2016(b)
September 2021 1.800% 750
 750
 
 
 
 
 
August 2016(b)
September 2026 2.650% 1,500
 1,500
 
 
 
 
 
August 2016(b)
September 2046 3.750% 1,500
 1,500
 
 
 
 
 
Secured Debt              

  
June 2016(c)
March 2020 1.196% 183
 
 
 
 183
 
 
June 2016(c)
September 2022 1.731% 150
 
 
 
 150
 
 
June 2016(c)
September 2029 2.538% 436
 
 
 
 436
 
 
June 2016(c)
March 2033 2.858% 250
 
 
 
 250
 
 
June 2016(c)
September 2036 3.112% 275
 
 
 
 275
 
 
August 2016(d)
June 2034 2.747%
(i) 
228
 
 
 
 
 
 
August 2016(d)
June 2020 2.747%
(i) 
105
 
 
 
 
 
 
First Mortgage Bonds              

  
March 2016(e)
March 2023 2.500% 500
 
 500
 
 
 
 
March 2016(e)
March 2046 3.875% 500
 
 500
 
 
 
 
May 2016(f)
May 2046 3.750% 500
 
 
 
 
 
 500
June 2016(e)
June 2046 3.700% 250
 
 
 
 
 250
 
September 2016(g)
October 2046 3.400% 600
 
 
 
 600
 
 
September 2016(e)
October 2046 3.700% 450
 
 
 450
 
 
 
November 2016(h)
December 2046 2.950% 600
 
 600
 
 
 
 
Total issuances    $9,127
 $4,100

$1,600
 $450

$1,894

$250
 $500
(a)Proceeds were used to pay down outstanding commercial paper and for general corporate purposes.
(b)Proceeds were used to finance a portion of the Piedmont acquisition. The $4.9 billion Bridge Facility was terminated following the issuance of this debt. See Note 2 for additional information on the Piedmont acquisition.
(c)DEFPF issued nuclear-asset recovery bonds and used the proceeds to acquire nuclear-asset recovery property from its parent, Duke Energy Florida. The nuclear-asset recovery bonds are payable only from and secured by the nuclear asset-recovery property. DEFPF is consolidated for financial reporting purposes; however, the nuclear asset-recovery bonds do not constitute a debt, liability or other legal obligation of, or interest in, Duke Energy Florida or any of its affiliates other than DEFPF. The assets of DEFPF, including the nuclear-asset recovery property, are not available to pay creditors of Duke Energy Florida or any of its affiliates. Duke Energy Florida used the proceeds from the sale to repay short-term borrowings under the intercompany money pool borrowing arrangement and make an equity distribution of $649 million to the ultimate parent, Duke Energy (Parent), which repaid short-term borrowings. The nuclear-asset recovery bonds are sequential pay amortizing bonds. The maturity date above represents the scheduled final maturity date for the bonds. See Notes 4 and 17 for additional information.
(d)Emerald State Solar, LLC, an indirect wholly owned subsidiary of Duke Energy entered into portfolio financing of approximately 22 North Carolina solar facilities. Tranche A of $228 million is secured by substantially all of the assets of the solar facilities and is nonrecourse to Duke Energy. Tranche B of $105 million is secured by an Equity Contribution Agreement with Duke Energy. Proceeds were used to reimburse Duke Energy for a portion of previously funded construction expenditures related to the Emerald State Solar, LLC portfolio. The initial interest rate on the loans was six months London Interbank Offered Rate (LIBOR) plus an applicable margin of 1.75 percent plus a 0.125 percent increase every three years thereafter. In connection with this debt issuance, Emerald State Solar, LLC entered into two interest rate swaps to convert the substantial majority of the loan interest payments from variable rates to fixed rates of approximately 1.81 percent for Tranche A and 1.38 percent for Tranche B, plus the applicable margin. See Note 14 for further information on the notional amounts of the interest rate swaps.
(e)Proceeds were used to fund capital expenditures for ongoing construction, capital maintenance and for general corporate purposes.
(f)Proceeds were used to repay $325 million of unsecured debt due June 2016, $150 million of first mortgage bonds due July 2016 and for general corporate purposes.
(g)Proceeds were used to fund capital expenditures for ongoing construction, capital maintenance, to repay short-term borrowings under the intercompany money pool borrowing arrangement and for general corporate purposes.
(h)Proceeds were used to repay at maturity $350 million aggregate principal amount of certain bonds due December 2016, as well as to fund capital expenditures for ongoing construction and capital maintenance and for general corporate purposes.
(i)Debt issuance has a floating interest rate.


179

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

In July 2016, Piedmont issued $300 million unsecured notes maturing in November 2046 with an interest rate of 3.64%. Piedmont has the option to redeem all or part of the notes before May 1, 2046, at a redemption price equal to the greater of a) 100% of the principal amount of the notes to be redeemed, and b) the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the date of redemption on a semi-annual basis at the Treasury Rate as defined in the indenture, as supplemented, plus 25 basis points and any accrued and unpaid interest to the date of redemption. Piedmont has the option to redeem all or part of the notes on or after May 1, 2046, at 100% of the principal amounts plus any accrued and unpaid interest to the date of redemption. Piedmont used the proceeds to fund capital expenditures, to repay short-term borrowings under Piedmont's commercial paper program and for general corporate purposes.
Available Credit Facilities
In March 2017,January 2018, Duke Energy amended its Master Credit Facility to increase its capacity from $7.5 billion to $8 billion, and to extendextended the termination date of the facilitysubstantially all of its existing $8 billion Master Credit Facility capacity from January 30, 2020,March 16, 2022, to March 16, 2022. The amendment also added Piedmont as a borrower within2023. In May 2018, Duke Energy completed the extension process with 100 percent of all commitments to the Master Credit Facility. Piedmont's separate $850 million credit facility was terminated in connection with the amendment. With the amendment, theFacility extending to March 16, 2023. The Duke Energy Registrants, excluding Progress Energy (Parent), have borrowing capacity under the Master Credit Facility up to specified sublimits for each borrower. Duke Energy has the unilateral ability at any time to increase or decrease the borrowing sublimits of each borrower, subject to a maximum sublimit for each borrower. The amount available under the Master Credit Facility has been reduced to backstop issuances of commercial paper, certain letters of credit and variable-rate demand tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder. Duke Energy Carolinas and Duke Energy Progress are also required to each maintain $250 million of available capacity under the Master Credit Facility as security to meet obligations under plea agreements reached with the U.S. Department of Justice in 2015 related to violations at North Carolina facilities with ash basins.
In January 2018, Duke Energy further amended its Master Credit Facility with consenting lenders to extend $7.65 billion of our existing $8 billion Master Credit Facility by one year to March 16, 2023.



FINANCIAL STATEMENTSDEBT AND CREDIT FACILITIES


The table below includes the current borrowing sublimits and available capacity under these credit facilities.
December 31, 2017  December 31, 2018
  Duke
 Duke
 Duke
 Duke
 Duke
 Duke
    Duke
 Duke
 Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Energy
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Energy
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 (Parent)
 Carolinas
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 (Parent)
 Carolinas
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Facility size(a)
$8,000
 $2,850
 $1,350
 $1,250
 $800
 $450
 $600
 $700
$8,000
 $2,650
 $1,750
 $1,400
 $650
 $450
 $600
 $500
Reduction to backstop issuances                              
Commercial paper(b)
(1,799) (561) (371) (314) 
 (45) (260) (248)(3,022) (917) (739) (444) (108) (299) (317) (198)
Outstanding letters of credit(63) (54) (4) (2) (1) 
 
 (2)(53) (45) (4) (2) 
 
 
 (2)
Tax-exempt bonds(81) 
 
 
 
 
 (81) 
(81) 
 
 
 
 
 (81) 
Coal ash set-aside(500) 
 (250) (250) 
 
 
 
(500) 
 (250) (250) 
 
 
 
Available capacity$5,557

$2,235

$725

$684

$799

$405

$259
 $450
$4,344

$1,688

$757

$704

$542

$151

$202
 $300
(a)Represents the sublimit of each borrower.
(b)Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies in the Consolidated Balance Sheets.
Three-Year Revolving Credit Facility
In June 2017, Duke Energy (Parent) entered intohas a three-year $1.0 billion revolving credit facility (the Three Year Revolver).through June 2020. Borrowings under this facility will be used for general corporate purposes.
As of December 31, 2017,2018, $500 million has been drawn under the Three Year Revolver. This balance is classified as Long-Term DebtLong-term debt on Duke Energy's Consolidated Balance Sheets. Any undrawn commitments can be drawn, and borrowings can be prepaid, at any time throughout the term of the facility. The terms and conditions of the Three Year Revolver are generally consistent with those governing Duke Energy's Master Credit Facility.
Duke Energy Progress Term Loan Facility
In December 2018, Duke Energy Progress entered into a two-year term loan facility with commitments totaling $700 million. Borrowings under the facility will be used to pay storm-related costs, pay down commercial paper and to partially finance an upcoming bond maturity. As of December 31, 2018, $50 million has been drawn under the term loan. The balance is classified as Long-term debt on Duke Energy Progress' Consolidated Balance Sheets. In January and February 2019, the remaining $650 million was drawn under the term loan.
Piedmont Term Loan Facility
In June 2017,September 2018, Piedmont entered intoexecuted an 18-monthamendment to its existing senior unsecured term loan facility withfacility. The amendment increased commitments totalingfrom $250 million (the Piedmont Term Loan).to $350 million and extended the maturity date to September 2019. Borrowings under the facility will be used for general corporate purposes.
As of December 31, 2017,2018, the entire $250$350 million has been drawn under the Piedmont Term Loan. This balance is classified as Long-Term DebtCurrent maturities of long-term debt on Piedmont's Consolidated Balance Sheets. The terms and conditions of the Piedmont Term Loan are generally consistent with those governing Duke Energy's Master Credit Facility.
Other Debt Matters
In September 2016, Duke Energy filed a Registration statement (Form S-3)Form S-3 with the SEC. Under this Form S-3, which is uncapped, the Duke Energy Registrants, excluding Progress Energy, may issue debt and other securities in the future at amounts, prices and with terms to be determined at the time of future offerings. The registration statement was filed to replace a similar prior filing upon expiration of its three-year term and also allows for the issuance of common stock by Duke Energy.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Duke Energy has an effective Form S-3 with the SEC to sell up to $3 billion of variable denomination floating-rate demand notes, called PremierNotes. The Form S-3 states that no more than $1.5 billion of the notes will be outstanding at any particular time. The notes are offered on a continuous basis and bear interest at a floating rate per annum determined by the Duke Energy PremierNotes Committee, or its designee, on a weekly basis. The interest rate payable on notes held by an investor may vary based on the principal amount of the investment. The notes have no stated maturity date, are non-transferable and may be redeemed in whole or in part by Duke Energy or at the investor’s option at any time. The balance as of December 31, 2018, and 2017 and 2016 was $986$1,010 million and $1,090$986 million, respectively. The notes are short-term debt obligations of Duke Energy and are reflected as Notes payable and commercial paper on Duke Energy’s Consolidated Balance Sheets.
In January 2017, Duke Energy amended its Form S-3 to add Piedmont as a registrant and included in the amendment a prospectus for Piedmont under which it may issue debt securities in the same manner as other Duke Energy Registrants.
Duke Energy guaranteed debt issued by Duke Energy Carolinas of $650 million and $762 million, respectively, as of December 31, 2017, and 2016.
Money Pool
The Subsidiary Registrants, excluding Progress Energy (Parent), are eligible to receive support for their short-term borrowing needs through participation with Duke Energy and certain of its subsidiaries in a money pool arrangement. Under this arrangement, those companies with short-term funds may provide short-term loans to affiliates participating in this arrangement. The money pool is structured such that the Subsidiary Registrants, excluding Progress Energy (Parent), separately manage their cash needs and working capital requirements. Accordingly, there is no net settlement of receivables and payables between money pool participants. Duke Energy (Parent), may loan funds to its participating subsidiaries, but may not borrow funds through the money pool. Accordingly, as the money pool activity is between Duke Energy and its wholly owned subsidiaries, all money pool balances are eliminated within Duke Energy’s Consolidated Balance Sheets.



FINANCIAL STATEMENTSDEBT AND CREDIT FACILITIES


Money pool receivable balances are reflected within Notes receivable from affiliated companies on the Subsidiary Registrants’ Consolidated Balance Sheets. Money pool payable balances are reflected within either Notes payable to affiliated companies or Long-Term Debt Payable to Affiliated Companies on the Subsidiary Registrants’ Consolidated Balance Sheets.
Restrictive Debt Covenants
The Duke Energy Registrants’ debt and credit agreements contain various financial and other covenants. Duke Energy's Master Credit Facility contains a covenant requiring the debt-to-total capitalization ratio not to exceed 65 percent for each borrower, excluding Piedmont, and 70 percent for Piedmont. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements. As of December 31, 2017,2018, each of the Duke Energy Registrants was in compliance with all covenants related to their debt agreements. In addition, some credit agreements may allow for acceleration of payments or termination of the agreements due to nonpayment, or acceleration of other significant indebtedness of the borrower or some of its subsidiaries. None of the debt or credit agreements contain material adverse change clauses.
Other Loans
As of December 31, 2017,2018, and 2016,2017, Duke Energy had loans outstanding of $701$741 million, including $38$37 million at Duke Energy Progress and $661$701 million, including $39$38 million at Duke Energy Progress, respectively, against the cash surrender value of life insurance policies it owns on the lives of its executives. The amounts outstanding were carried as a reduction of the related cash surrender value that is included in Other within Investments and Other Noncurrent Assets on the Consolidated Balance Sheets.
7. GUARANTEES AND INDEMNIFICATIONS
Duke Energy and Progress Energy have various financial and performance guarantees and indemnifications, which are issued in the normal course of business. As discussed below, these contracts include performance guarantees, stand-bystandby letters of credit, debt guarantees, surety bonds and indemnifications. Duke Energy and Progress Energy enter into these arrangements to facilitate commercial transactions with third parties by enhancing the value of the transaction to the third party. At December 31, 2017,2018, Duke Energy and Progress Energy do not believe conditions are likely for significant performance under these guarantees. To the extent liabilities are incurred as a result of the activities covered by the guarantees, such liabilities are included on the accompanying Consolidated Balance Sheets.
On January 2, 2007, Duke Energy completed the spin-off of its natural gas businesses to shareholders. Guarantees issued by Duke Energy or its affiliates, or assigned to Duke Energy prior to the spin-off, remained with Duke Energy subsequent to the spin-off. Guarantees issued by Spectra Energy Capital LLC (Spectra Capital) or its affiliates prior to the spin-off remained with Spectra Capital subsequent to the spin-off, except for guarantees that were later assigned to Duke Energy. Duke Energy has indemnified Spectra Capital against any losses incurred under certain of the guarantee obligations that remain with Spectra Capital. At December 31, 2017,2018, the maximum potential amount of future payments associated with these guarantees was $205 million, the majority of which expires by 2028.
Duke Energy has issued performance guarantees to customers and other third parties that guarantee the payment and performance of other parties, including certain non-wholly owned entities, as well as guarantees of debt of certain non-consolidated entities and less than wholly owned consolidated entities. If such entities were to default on payments or performance, Duke Energy would be required under the guarantees to make payments on the obligations of the less than wholly owned entity. The maximum potential amount of future payments required under these guarantees as of December 31, 2017,2018, was $326$296 million. Of this amount, $11 million relates to guarantees issued on behalf of less than wholly owned consolidated entities, with the remainder related to guarantees issued on behalf of third parties and unconsolidated affiliates of Duke Energy. Of the guarantees noted above, $281$248 million of the guarantees expire between 2019 and 2030, with the remaining performance guarantees having no contractual expiration.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

In October 2017, ACP executed a $3.4 billion revolving credit facility with a stated maturity date of October 2021. Duke Energy entered into a guarantee agreement to support its share of the ACP revolving credit facility. Duke Energy's maximum exposure to loss under the terms of the guarantee is limited to$677 million as of December 31, 2018. This amount represents 47 percent of the outstanding borrowings under the credit facility, which was $312facility.
Duke Energy guaranteed debt issued by Duke Energy Carolinas of $650 million as of December 31, 2018, and 2017.
Duke Energy has guaranteed certain issuers of surety bonds, obligating itself to make payment upon the failure of a wholly owned and former non-wholly owned entity to honor its obligations to a third party. Under these arrangements, Duke Energy has payment obligations that are triggered by a draw by the third party or customer due to the failure of the wholly owned or former non-wholly owned entity to perform according to the terms of its underlying contract. At December 31, 2017,2018, Duke Energy had guaranteed $81$63 million of outstanding surety bonds, most of which have no set expiration.
Duke Energy uses bank-issued stand-bystandby letters of credit to secure the performance of wholly owned and non-wholly owned entities to a third party or customer. Under these arrangements, Duke Energy has payment obligations to the issuing bank that are triggered by a draw by the third party or customer due to the failure of the wholly owned or non-wholly owned entity to perform according to the terms of its underlying contract. At December 31, 2017,2018, Duke Energy had issued a total of $449$454 million in letters of credit, which expire between 20182019 and 2022. The unused amount under these letters of credit was $66$60 million.
Duke Energy and Progress Energy have issued indemnifications for certain asset performance, legal, tax and environmental matters to third parties, including indemnifications made in connection with sales of businesses. At December 31, 2017, the estimated maximum exposure for these indemnifications was $89 million, most of which have no set expiration. For certain matters for which Progress Energy receives timely notice, indemnity obligations may extend beyond the notice period. Certain indemnifications related to discontinued operations have no limitations as to time or maximum potential future payments.
Duke Energy recognized $21$23 million and $13$21 million, as of December 31, 2017,2018, and 2016,2017, respectively, primarily in Other within Other Noncurrent Liabilities on the Consolidated Balance Sheets, for the guarantees discussed above. As current estimates change, additional losses related to guarantees and indemnifications to third parties, which could be material, may be recorded by the Duke Energy Registrants in the future.



FINANCIAL STATEMENTSJOINT OWNERSHIP OF GENERATING AND TRANSMISSION FACILITIES


8. JOINT OWNERSHIP OF GENERATING AND TRANSMISSION FACILITIES
The Duke Energy Registrants maintain ownership interests in certain jointly owned generating and transmission facilities. The Duke Energy Registrants are entitled to a share of the generating capacity and output of each unit equal to their respective ownership interests. The Duke Energy Registrants pay their ownership share of additional construction costs, fuel inventory purchases and operating expenses. The Duke Energy Registrants share of revenues and operating costs of the jointly owned facilities is included within the corresponding line in the Consolidated Statements of Operations. Each participant in the jointly owned facilities must provide its own financing.
The following table presents the Duke Energy Registrants' interest of jointly owned plant or facilities and amounts included on the Consolidated Balance Sheets. All facilities are operated by the Duke Energy Registrants and are included in the Electric Utilities and Infrastructure segment.
 December 31, 2017
       Construction
 Ownership
 Property, Plant
 Accumulated
 Work in
(in millions except for ownership interest)Interest
 and Equipment
 Depreciation
 Progress
Duke Energy Carolinas 
      
Catawba Nuclear Station (units 1 and 2)(a)
19.25% $927
 $651
 $19
Lee Combined Combustion Station(b)
86.67% 
 
 552
Duke Energy Ohio   
  
  
Transmission facilities(c)
Various
 89
 63
 1
Duke Energy Indiana 
  
  
  
Gibson Station (unit 5)(d)
50.05% 348
 162
 9
Vermillion Generating Station(e)
62.5% 155
 120
 
Transmission and local facilities(d)
Various
 4,672
 1,739
 
 December 31, 2018
       Construction
 Ownership
 Property, Plant
 Accumulated
 Work in
(in millions except for ownership interest)Interest
 and Equipment
 Depreciation
 Progress
Duke Energy Carolinas 
      
Catawba (units 1 and 2)(a)
19.25% $989
 $483
 $17
W.S. Lee CC(b)
86.67% 593
 12
 4
Duke Energy Indiana 
  
  
  
Gibson (unit 5)(c)
50.05% 390
 173
 3
Vermillion(d)
62.50% 168
 135
 
Transmission and local facilities(c)
Various
 5,037
 1,769
 
(a)Jointly owned with North Carolina Municipal Power Agency Number 1, NCEMC and Piedmont Municipal Power Agency.PMPA.
(b)Jointly owned with NCEMC.
(c)Jointly owned with America ElectricWVPA and Indiana Municipal Power Generation Resources and The Dayton Power and Light Company.Agency.
(d)Jointly owned with Wabash Valley Power Association, Inc. (WVPA) and Indiana Municipal Power Agency.
(e)Jointly owned with WVPA.
Effective June 30, 2018, Duke Energy Ohio, Ohio Power Company, and The Dayton Power and Light Company, completed an asset exchange that reallocated their ownership interest in certain jointly owned transmission facilities. This transaction was approved by FERC and PUCO. The transaction eliminated the joint owner relationships for these assets. Assets were exchanged at net book value and the net increase in Duke Energy Ohio's assets are shown within Capital expenditures in Duke Energy Ohio's Consolidated Statements of Cash Flows.
9. ASSET RETIREMENT OBLIGATIONS
Duke Energy records an ARO when it has a legal obligation to incur retirement costs associated with the retirement of a long-lived asset and the obligation can be reasonably estimated. Certain assets of the Duke Energy Registrants’Registrants have an indeterminate life, such as transmission and distribution facilities, and thus the fair value of the retirement obligation is not reasonably estimable. A liability for these AROs will be recorded when a fair value is determinable.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The Duke Energy Registrants’ regulated operations accrue costs of removal for property that does not have an associated legal retirement obligation based on regulatory orders from state commissions. These costs of removal are recorded as a regulatory liability in accordance with regulatory accounting treatment. The Duke Energy Registrants do not accrue the estimated cost of removal for any nonregulated assets. See Note 4 for the estimated cost of removal for assets without an associated legal retirement obligation, which are included in Regulatory liabilities on the Consolidated Balance Sheets.
The following table presents the AROs recorded on the Consolidated Balance Sheets.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Decommissioning of nuclear power facilities(a)
$5,371
 $1,944
 $3,246
 $2,564
 $681
 $
 $
 $
$5,696
 $2,335
 $3,209
 $2,679
 $530
 $
 $
 $
Closure of ash impoundments4,525
 1,629
 2,094
 2,075
 19
 39
 763
 
4,446
 1,568
 2,123
 2,103
 20
 52
 702
 
Other(b)
279
 37
 74
 34
 42
 45
 18
 15
325
 46
 79
 38
 41
 41
 20
 19
Total asset retirement obligation$10,175
 $3,610
 $5,414
 $4,673
 $742
 $84
 $781

$15
$10,467
 $3,949
 $5,411
 $4,820
 $591
 $93
 $722

$19
Less: current portion689
 337
 295
 295
 
 3
 54
 
919
 290
 514
 509
 5
 6
 109
 
Total noncurrent asset retirement obligation$9,486
 $3,273
 $5,119
 $4,378
 $742
 $81
 $727

$15
$9,548
 $3,659
 $4,897
 $4,311
 $586
 $87
 $613

$19
(a)Duke Energy amount includes purchase accounting adjustments related to the merger with Progress Energy.
(b)Primarily includes obligations related to asbestos removal. Duke Energy Ohio and Piedmont also include AROs related to the retirement of natural gas mains and services. Duke Energy includes AROs related to the removal of renewable energy generation assets.



FINANCIAL STATEMENTSASSET RETIREMENT OBLIGATIONS


Nuclear Decommissioning Liability
AROs related to nuclear decommissioning are based on site-specific cost studies. The NCUC, PSCSC and FPSC require updated cost estimates for decommissioning nuclear plants every five years.
The following table summarizes information about the most recent site-specific nuclear decommissioning cost studies. Decommissioning costs in the table below are stated in 2013 or2018 dollars for Duke Energy Carolinas, 2017 dollars for Duke Energy Florida and 2014 dollars depending on the year of the cost study,for Duke Energy Progress, and include costs to decommission plant components not subject to radioactive contamination.
Annual Funding
 Decommissioning
 Annual Funding
 Decommissioning
 
(in millions)
Requirement(a)

 
Costs(a)(b)

 Year of Cost Study
Requirement(a)

 
Costs(a)

 Year of Cost Study
Duke Energy$14
 $8,150

2013 and 2014$24
 $8,737

2014 and 2018
Duke Energy Carolinas(c)
 3,420

2013
 4,291

2018
Duke Energy Progress14
 3,550

201424
 3,550

2014
Duke Energy Florida(d)
 1,180

2013
 896

2018
(a)Amounts for Progress Energy equal the sum of Duke Energy Progress and Duke Energy Florida.
(b)Amounts include the Subsidiary Registrant'sDecommissioning cost for Duke Energy Carolinas reflects its ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors.
(c)Duke Energy Carolinas' site-specific nuclear decommissioning cost study completed in 2018 is expected to be filed with the NCUC and PSCSC by the second quarter 2019. Duke Energy Carolinas will also complete a new funding study, which will be completed and filed with the NCUC and PSCSC in 2019.
(d)Duke Energy Florida's site-specific nuclear decommissioning cost study and a new funding study were completed and filed with the FPSC in 2018.
Nuclear Decommissioning Trust Funds
Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida each maintain NDTFs that are intended to pay for the decommissioning costs of their respective nuclear power plants. The NDTF investments are managed and invested in accordance with applicable requirements of various regulatory bodies including the NRC, FERC, NCUC, PSCSC, FPSC and the Internal Revenue Service (IRS).IRS.
Use of the NDTF investments is restricted to nuclear decommissioning activities including license termination, spent fuel and site restoration. The license termination and spent fuel obligations relate to contaminated decommissioning and are recorded as AROs. The site restoration obligation relates to non-contaminated decommissioning and is recorded to cost of removal within Regulatory liabilities on the Consolidated Balance Sheets.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table presents the fair value of NDTF assets legally restricted for purposes of settling AROs associated with nuclear decommissioning. Duke Energy Florida is actively decommissioning Crystal River Unit 3 and was granted an exemption from the NRC, which allows for use of the NDTF for all aspects of nuclear decommissioning. The entire balance of Duke Energy Florida's NDTF may be applied toward license termination, spent fuel and site restoration costs incurred to decommission Crystal River Unit 3.3 and is excluded from the table below. See Note 16 for additional information related to the fair value of the Duke Energy Registrants' NDTFs.
December 31,December 31,
(in millions)2017 20162018 2017
Duke Energy$5,864
 $5,099
$5,579
 $5,864
Duke Energy Carolinas3,321
 2,882
3,133
 3,321
Duke Energy Progress2,543
 2,217
2,446
 2,543
Nuclear Operating Licenses
Operating licenses for nuclear units are potentially subject to extension. The following table includes the current expiration of nuclear operating licenses.
UnitYear of Expiration
Duke Energy Carolinas 
Catawba Units 1 and 22043
McGuire Unit 12041
McGuire Unit 22043
Oconee Units 1 and 22033
Oconee Unit 32034
Duke Energy Progress 
Brunswick Unit 12036
Brunswick Unit 22034
Harris2046
Robinson2030
Duke Energy Florida



FINANCIAL STATEMENTSASSET RETIREMENT OBLIGATIONS


The NRC has requestedacknowledged permanent cessation of operation and permanent removal of fuel from the NRC terminate the operating license forreactor vessel at Crystal River Unit 3 as it permanently ceased3. Therefore, the license no longer authorizes operation in February 2013.of the reactor. In January 2018, Crystal River Unit 3 reached a SAFSTOR status.
Closure of Ash Impoundments
The Duke Energy Registrants are subject to state and federal regulations covering the closure of coal ash impoundments, including the EPA CCR rule and the Coal Ash Act, and other agreements. AROs recorded on the Duke Energy Registrants' Consolidated Balance Sheets include the legal obligation for closure of coal ash basins and the disposal of related ash as a result of these regulations and agreements.
The Coal Ash Act, as amended, requires excavation of the Sutton, Riverbend and Dan River basins by August 1, 2019, and Asheville basins by August 1, 2022. Excavation at these sites may include a combination of transfer of coal ash to an engineered landfill or conversion for beneficial use. Basins at the H.F. Lee, Cape Fear and Weatherspoon sites are required to be closed through excavation no later than August 1, 2028. Excavation at these sites can include conversion of the basin to a lined industrial landfill, transfer of ash to an engineered landfill or conversion for beneficial use. The remaining basins are required to be closed no later than December 31, 2024, through conversion to a lined industrial landfill, transfer to an engineered landfill or conversion for beneficial use, unless certain dam improvement projects and alternative drinking water source projects are completed by October 15, 2018. Upon satisfactory completion of these projects, the closure deadline would be extended to December 31, 2029, and could include closure through the combination of a cap system and a groundwater monitoring system.
The Coal Ash Act also required the installation and operation of three large-scale coal ash beneficiation projects to produce reprocessed ash for use in the concrete industry. Duke Energy selected the Buck, H.F. Lee and Cape Fear plants for these projects. Closure at these sites is required to be completed no later than December 31, 2029.
The Coal Ash Act includes a variance procedure for compliance deadlines and other issues surrounding the management of CCR and CCR surface impoundments and prohibits cost recovery in customer rates for unlawful discharge of ash impoundment waters occurring after January 1, 2014. The Coal Ash Act leaves the decision on cost recovery determinations related to closure of ash impoundments to the normal ratemaking processes before utility regulatory commissions. Closure plans and all associated permits must be approved by NCDEQ before any closure work can begin.
The EPA CCR rule establishes requirements regarding landfill design, structural integrity design and assessment criteria for surface impoundments, groundwater monitoring and protection procedures and other operational and reporting procedures to ensure the safe disposal and management of CCR. The EPA CCR rule has certain requirements which if not met could initiate impoundment closure and require closure completion within five years. The EPA CCR rule includes extension requirements, which if met could allow the extension of closure completion by up to 10 years.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The ARO amount recorded on the Consolidated Balance Sheets is based upon estimated closure costs for impacted ash impoundments. The amount recorded represents the discounted cash flows for estimated closure costs based upon either specific closure plans or the probability weightings of the potential closure methods as evaluated on a site-by-site basis. Actual costs to be incurred will be dependent upon factors that vary from site to site. The most significant factors are the method and time frame of closure at the individual sites. Closure methods considered include removing the water from ash basins, consolidating material as necessary and capping the ash with a synthetic barrier, excavating and relocating the ash to a lined structural fill or lined landfill or recycling the ash for concrete or some other beneficial use. The ultimate method and timetable for closure will be in compliance with standards set by federal and state regulations and other agreements. The ARO amount will be adjusted as additional information is gained through the closure and post-closure process, including acceptance and approval of compliance approaches, which may change management assumptions, and may result in a material change to the balance. See ARO Liability Rollforward section below for information on revisions made to the coal ash liability during 20172018 and 2016.2017.
Asset retirement costs associated with the AROs for operating plants and retired plants are included in Net property, plant and equipment and Regulatory assets, respectively, on the Consolidated Balance Sheets. See Note 4 for additional information on Regulatory assets related to AROs.
Cost recovery for future expenditures will be pursued through the normal ratemaking process with federal and state utility commissions, which permit recovery of necessary and prudently incurred costs associated with Duke Energy’s regulated operations. See Note 4 for additional information on recovery of coal ash costs.
ARO Liability Rollforward
During 2017 and 2016, the Duke Energy Registrants updated coal ash ARO liability estimates based on additional site-specific information for the related costs, methods and timing of work to be performed. Actual closure costs incurred could be materially different from current estimates that form the basis of the recorded AROs.
The following tables present changes in the liability associated with AROs.
   Duke
   Duke
 Duke
 Duke
 Duke
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Balance at December 31, 2015$10,249
 $3,918
 $5,369
 $4,567
 $802
 $125
 $525
Acquisitions(a)
22
 
 2
 
 2
 
 
Accretion expense(b)
400
 187
 230
 194
 35
 5
 24
Liabilities settled(c)  
(613) (287) (272) (212) (60) (5) (49)
Liabilities incurred in the current year51
 
 3
 3
 
 
 29
Revisions in estimates of cash flows502
 77
 143
 145
 (1) (48) 337
Balance at December 31, 201610,611

3,895

5,475

4,697

778

77

866
Accretion expense(b)
435
 184
 228
 195
 33
 3
 32
Liabilities settled(c)  
(619) (282) (270) (204) (65) (7) (49)
Liabilities incurred in the current year(d)
51
 5
 
 
 
 7
 29
Revisions in estimates of cash flows(303) (192) (19) (15) (4) 4
 (97)
Balance at December 31, 2017$10,175

$3,610

$5,414

$4,673

$742

$84

$781
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Balance at December 31, 2016$10,611
 $3,895
 $5,475
 $4,697
 $778
 $77
 $866
 $14
Accretion expense(a)
435
 184
 228
 195
 33
 3
 32
 1
Liabilities settled(b)  
(619) (282) (270) (204) (65) (7) (49) (8)
Liabilities incurred in the current year(c)
51
 5
 
 
 
 7
 29
 8
Revisions in estimates of cash flows(303) (192) (19) (15) (4) 4
 (97) 
Balance at December 31, 201710,175

3,610

5,414

4,673

742

84

781
 15
Accretion expense(a)
427
 179
 225
 196
 29
 4
 29
 1
Liabilities settled(b)  
(638) (281) (272) (227) (45) (5) (79) 
Liabilities incurred in the current year(c)
39
 8
 5
 
 5
 
 25
 
Revisions in estimates of cash flows(d)
464
 433
 39
 178
 (140) 10
 (34) 3
Balance at December 31, 2018$10,467

$3,949

$5,411

$4,820

$591

$93

$722
 $19
(a)Duke Energy amount relates to the Piedmont acquisition. See Note 2 for additional information.
(b)Substantially all accretion expense for the years ended December 31, 2017,2018, and 20162017 relates to Duke Energy’s regulated electric operations and has been deferred in accordance with regulatory accounting treatment.
(c)(b)Amounts primarily relate to ash impoundment closures and nuclear decommissioning of Crystal River Unit 3.
(d)(c)Amounts primarily relate to AROs recorded as a result of state agency closure requirements at Duke Energy Indiana.
(d)Amounts primarily relate to increases in groundwater monitoring estimates for closure of ash impoundments and an increase for nuclear decommissioning costs at Duke Energy Carolinas' nuclear sites compared to original estimates, partially offset by a reduction for nuclear decommissioning at Crystal River Unit 3 compared to original estimates and modifications to the timing of expected cash flows for coal ash AROs.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)


(in millions) Piedmont
Balance at October 31, 2015 $20
Accretion expense 1
Liabilities settled (7)
Liabilities incurred in the current year 6
Revisions in estimates of cash flows (6)
Balance at October 31, 2016 14
Liabilities settled (1)
Liabilities incurred in the current year 1
Balance at December 31, 2016 14
Accretion expense 1
Liabilities settled (8)
Liabilities incurred in the current year 8
Balance at December 31, 2017 $15
FINANCIAL STATEMENTSPROPERTY, PLANT AND EQUIPMENT


10. PROPERTY, PLANT AND EQUIPMENT
The following tables summarize the property, plant and equipment for Duke Energy and its subsidiary registrants.
December 31, 2017December 31, 2018
Estimated                Estimated                
Useful   Duke
   Duke
 Duke
 Duke
 Duke
  Useful   Duke
   Duke
 Duke
 Duke
 Duke
  
Life Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Life Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)(Years) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont(Years) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Land $1,559
 $467
 $767
 $424
 $343
 $134
 $111
 $41
 $2,072
 $472
 $868
 $445
 $423
 $136
 $116
 $448
Plant – Regulated                                
Electric generation, distribution and transmission8-100 93,687
 35,657
 39,419
 24,502
 14,917
 4,870
 13,741
 
15-100 100,706
 38,468
 42,760
 26,147
 16,613
 5,182
 14,292
 
Natural gas transmission and distribution12-80 8,292
 
 
 
 
 2,559
 
 5,733
12-80 8,808
 
 
 
 
 2,719
 
 6,089
Other buildings and improvements15-100 1,936
 647
 652
 316
 336
 243
 240
 154
24-90 1,966
 681
 636
 295
 341
 270
 253
 126
Plant – Nonregulated                                  
Electric generation, distribution and transmission(a)
5-30 4,273
 
 
 
 
 
 
 
Electric generation, distribution and transmission5-30 4,410
 
 
 
 
 
 
 
Other buildings and improvements25-35 465
 
 
 
 
 
 
 
25-35 494
 
 
 
 
 
 
 
Nuclear fuel  3,680
 2,120
 1,560
 1,560
 
 
 
 

 3,460
 1,898
 1,562
 1,562
 
 
 
 
Equipment3-55 2,122
 402
 555
 416
 139
 348
 169
 266
3-55 2,141
 467
 565
 399
 166
 384
 178
 141
Construction in process  6,995
 2,614
 3,059
 1,434
 1,625
 350
 416
 231

 5,726
 1,678
 2,515
 1,659
 856
 412
 325
 382
Other3-40 4,498
 1,032
 1,311
 931
 370
 228
 271
 300
3-40 4,675
 1,077
 1,354
 952
 393
 257
 279
 300
Total property, plant and equipment(e)(d)
 127,507
 42,939
 47,323
 29,583
 17,730
 8,732
 14,948
 6,725
 134,458
 44,741
 50,260
 31,459
 18,792
 9,360
 15,443
 7,486
Total accumulated depreciation – regulated(e)(d)
 (39,742) (15,063) (15,857) (10,903) (4,947) (2,691) (4,662) (1,479) (41,079) (15,496) (16,398) (11,423) (4,968) (2,717) (4,914) (1,575)
Total accumulated depreciation – nonregulated(e)(d)
 (1,795) 
 
 
 
 
 
 
 (2,047) 
 
 
 
 
 
 
Generation facilities to be retired, net 421
 
 421
 421
 
 
 
 
 362
 
 362
 362
 
 
 
 
Total net property, plant and equipment $86,391

$27,876

$31,887

$19,101

$12,783

$6,041
 $10,286
 $5,246
 $91,694

$29,245

$34,224

$20,398

$13,824

$6,643
 $10,529
 $5,911
(a)Includes capitalized leases of $1,237 million, $135 million, $257 million, $137 million, $120 million, $73 million and $35 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $131 million, $14 million and $117 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $1,947 million, $1,087 million, $860 million and $860 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
(c)Includes accumulated amortization of capitalized leases of $61 million, $12 million, $20 million and $10 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes gross property, plant and equipment cost of consolidated VIEs of $4,007 million and accumulated depreciation of consolidated VIEs of $698 million at Duke Energy.



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FINANCIAL STATEMENTSPROPERTY, PLANT AND EQUIPMENT
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 December 31, 2017
 Estimated                
 Useful   Duke
   Duke
 Duke
 Duke
 Duke
  
 Life Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)(Years) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Land  $1,559
 $467
 $767
 $424
 $343
 $134
 $111
 $41
Plant – Regulated                 
Electric generation, distribution and transmission8-100 93,687
 35,657
 39,419
 24,502
 14,917
 4,870
 13,741
 
Natural gas transmission and distribution12-80 8,292
 
 
 
 
 2,559
 
 5,733
Other buildings and improvements15-100 1,936
 647
 652
 316
 336
 243
 240
 154
Plant – Nonregulated                 
Electric generation, distribution and transmission(a)
5-30 4,273
 
 
 
 
 
 
 
Other buildings and improvements25-35 465
 
 
 
 
 
 
 
Nuclear fuel  3,680
 2,120
 1,560
 1,560
 
 
 
 
Equipment3-55 2,122
 402
 555
 416
 139
 348
 169
 266
Construction in process  6,995
 2,614
 3,059
 1,434
 1,625
 350
 416
 231
Other3-40 4,498
 1,032
 1,311
 931
 370
 228
 271
 300
Total property, plant and equipment(b)(e)
  127,507
 42,939
 47,323
 29,583
 17,730
 8,732
 14,948
 6,725
Total accumulated depreciation – regulated(c)(d)(e)
  (39,742) (15,063) (15,857) (10,903) (4,947) (2,691) (4,662) (1,479)
Total accumulated depreciation – nonregulated(d)(e)
  (1,795) 
 
 
 
 
 
 
Generation facilities to be retired, net  421
 
 421
 421
 
 
 
 
Total net property, plant and equipment  $86,391
 $27,876
 $31,887
 $19,101
 $12,783
 $6,041
 $10,286
 $5,246
(a)Includes a pretax impairment charge of $58 million on a wholly owned non-contracted wind project. See discussion below.
(b)Includes capitalized leases of $1,294 million, $81 million, $272 million, $139 million, $133 million, $80 million and $35 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $114 million, $11 million and $103 million, respectively, of accumulated amortization of capitalized leases.
(c)Includes $2,113 million, $1,283 million, $831 million and $831 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
(d)Includes accumulated amortization of capitalized leases of $57 million, $11 million, $21 million and $9 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(e)Includes gross property, plant and equipment cost of consolidated VIEs of $3,941 million and accumulated depreciation of consolidated VIEs of $598 million at Duke Energy.
 December 31, 2016
 Estimated                
 Useful   Duke
   Duke
 Duke
 Duke
 Duke
  
 Life Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)(Years) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Land  $1,501
 $432
 $735
 $393
 $342
 $150
 $106
 $39
Plant – Regulated                 
Electric generation, distribution and transmission8-100 89,864
 34,515
 37,596
 23,683
 13,913
 4,593
 13,160
 
Natural gas transmission and distribution12-67 7,738
 
 
 
 
 2,456
 
 5,282
Other buildings and improvements15-100 1,692
 502
 634
 293
 341
 211
 197
 148
Plant – Nonregulated                 
Electric generation, distribution and transmission5-30 4,298
 
 
 
 
 
 
 
Other buildings and improvements25-35 421
 
 
 
 
 
 
 
Nuclear fuel  3,572
 2,092
 1,480
 1,480
 
 
 
 
Equipment3-38 1,941
 358
 505
 378
 127
 338
 156
 260
Construction in process  6,186
 2,324
 2,708
 1,329
 1,379
 206
 396
 210
Other5-40 4,184
 904
 1,206
 863
 332
 172
 226
 235
Total property, plant and equipment(a)(d)
  121,397
 41,127
 44,864
 28,419
 16,434
 8,126
 14,241
 6,174
Total accumulated depreciation – regulated(b)(c)(d)
  (37,831) (14,365) (15,212) (10,561) (4,644) (2,579) (4,317) (1,360)
Total accumulated depreciation – nonregulated(c)(d)
  (1,575) 
 
 
 
 
 
 
Generation facilities to be retired, net  529
 
 529
 529
 
 
 
 
Total net property, plant and equipment  $82,520
 $26,762
 $30,181
 $18,387
 $11,790
 $5,547
 $9,924
 $4,814
(a)Includes capitalized leases of $1,355 million, $40 million, $288 million, $142 million, $146 million, $81 million and $35 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio and Duke Energy Indiana, respectively, primarily within Plant – Regulated. The Progress Energy, Duke Energy Progress and Duke Energy Florida amounts are net of $99 million, $9 million and $90 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $1,922 million, $1,192 million, $730 million and $730 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
(c)Includes accumulated amortization of capitalized leases of $50 million, $9 million, $19 million and $8 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes gross property, plant and equipment cost of consolidated VIEs of $2,591 million and accumulated depreciation of consolidated VIEs of $411 million at Duke Energy.

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PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

During the year ended December 31, 2017, Duke Energy recorded a pretax impairment charge of $69 million on a wholly owned non-contracted wind project. The impairment was recorded within Impairment charges on Duke Energy’s Consolidated Statements of Operations. $58 million of the impairment related to property, plant and equipment and $11 million of the impairment related to a net intangible asset; see Note 11 for additional information. The charge represents the excess carrying value over the estimated fair value of the project, which was based on a Level 3 Fair Value measurement that was determined from the income approach using discounted cash flows. The impairment was primarily due to the non-contracted wind project being located in a market that has experienced continued declining market pricing during 2017 and declining long-term forecasted energy and capacity prices, driven by low natural gas prices, additional renewable generation placed in service and lack of significant load growth.



FINANCIAL STATEMENTSPROPERTY, PLANT AND EQUIPMENT


The following tables present capitalized interest, which includes the debt component of AFUDC.
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Duke Energy$128
 $100
 $98
$161
 $128
 $100
Duke Energy Carolinas45
 38
 38
35
 45
 38
Progress Energy45
 31
 24
51
 45
 31
Duke Energy Progress21
 17
 20
26
 21
 17
Duke Energy Florida24
 14
 4
25
 24
 14
Duke Energy Ohio10
 8
 10
17
 10
 8
Duke Energy Indiana9
 7
 6
27
 9
 7
Year Ended Two Months Ended Years Ended October 31,Years Ended December 31, Two Months Ended December 31, 
Year Ended
October 31,
(in millions)December 31, 2017 December 31, 2016 2016
 2015
2018 2017 2016 2016
Piedmont$12
 $2
 $12
 $11
$17
 $12
 $2
 $12
Operating Leases
Duke Energy's Commercial Renewables segment operates various renewable energy projects and sells the generated output to utilities, electric cooperatives, municipalities and commercial and industrial customers through long-term contracts. In certain situations, these long-term contracts and the associated renewable energy projects qualify as operating leases. Rental income from these leases is accounted for as Operating Revenues in the Consolidated Statements of Operations. There are no minimum lease payments as all payments are contingent based on actual electricity generated by the renewable energy projects. Contingent lease payments were $268 million, $262 million, $216 million, and $172$216 million for the years ended December 31, 2018, 2017 2016 and 2015.2016. As of December 31, 2017,2018, renewable energy projects owned by Duke Energy and accounted for as operating leases had a cost basis of $3,153$3,358 million and accumulated depreciation of $459$602 million. These assets are principally classified as nonregulated electric generation and transmission assets.
11. GOODWILL AND INTANGIBLE ASSETS
Goodwill
Duke Energy
The following table presents goodwill by reportable operating segment for Duke Energy included on Duke Energy's Consolidated Balance Sheets at December 31, 2017,2018, and 2016.2017.
Electric Utilities
 Gas Utilities
 Commercial
  Electric Utilities
 Gas Utilities
 Commercial
  
(in millions)and Infrastructure
 and Infrastructure
 Renewables
 Total
and Infrastructure
 and Infrastructure
 Renewables
 Total
Goodwill Balance at December 31, 2016$17,379
 $1,924
 $122
 $19,425
Goodwill Balance at December 31, 2017$17,379
 $1,924
 $122
 $19,425
Accumulated impairment charges(a)

 
 (29) (29)
 
 (29) (29)
Goodwill at December 31, 2017$17,379
 $1,924
 $93
 $19,396
Goodwill balance at December 31, 2017, adjusted for accumulated impairment charges$17,379
 $1,924
 $93
 $19,396
       
Goodwill Balance at December 31, 2018$17,379
 $1,924
 $122
 $19,425
Accumulated impairment charges(a)
$
 $
 $(122) $(122)
Goodwill balance at December 31, 2018, adjusted for accumulated impairment charges$17,379
 $1,924
 $
 $19,303
(a)Duke Energy evaluated the recoverability of goodwill during 2017 and recorded impairment charges of $29 million related to the Energy Management Solutions reporting unit within the Commercial Renewables segment. The fair value of the reporting unit was determined based on the market approach. See "Goodwill Impairment Testing" below for the results of the 2018 goodwill impairment test.
Duke Energy Ohio
Duke Energy Ohio's Goodwill balance of $920 million, allocated $596 million to Electric Utilities and Infrastructure and $324 million to Gas Utilities and Infrastructure, is presented net of accumulated impairment charges of $216 million on the Consolidated Balance Sheets at December 31, 2017,2018, and 2016.2017.

188

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Progress Energy
Progress Energy's Goodwill is included in the Electric Utilities and Infrastructure operating segment and there are no accumulated impairment charges.



FINANCIAL STATEMENTSGOODWILL AND INTANGIBLE ASSETS


Piedmont
Piedmont's Goodwill is included in the Gas Utilities and Infrastructure operating segment and there are no accumulated impairment charges. Effective with Piedmont's fiscal year being changed to December 31, as discussed in Note 1, Piedmont changed the date of its annual impairment testing of goodwill from October 31 to August 31 to align with the other Duke Energy Registrants.
Goodwill Impairment Testing
Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont are required to perform an annual goodwill impairment test as of the same date each year and, accordingly, perform their annual impairment testing of goodwill as of August 31. Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont update their test between annual tests if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. Except for
In the Energy Management Solutionsthird quarter of 2018, based on the results of the annual quantitative goodwill impairment test, management determined that the fair value
of the Commercial Renewables reporting unit was below its respective carrying value, including goodwill. Determination of the Commercial Renewables reporting unit fair value was based on an income approach, which estimates the fair value based on discounted future cash flows. The fair value of the Commercial Renewables reporting unit is impacted by several factors, including forecasted tax credit utilization, the cost of capital, current and forecasted solar and wind volumes, and legislative developments. Certain assumptions used in determining the fair value of the reporting unit in the 2018 impairment test changed from those used in the 2017 annual impairment test including the cost of capital as a result of rising interest rates and the timing of tax credit utilization due to tax reform and IRS clarification on bonus depreciation in August 2018. Based on the quantitative impairment test, the estimated fair value of the Commercial Renewables reporting unit was below its carrying value by an immaterial amount but still more than the goodwill balance assigned to the reporting unit. As such, the entire remaining goodwill balance of approximately $93 million was impaired during the third quarter of 2018.

The fair value of all other reporting units for Duke Energy, Progress Energy, Duke Energy Ohio and Piedmont exceeded their respective carrying values at the date of the annual impairment analysis.

189

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Intangible Assets
The following tables show the carrying amount and accumulated amortization of intangible assets included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets of the Duke Energy Registrants at December 31, 20172018, and 2016.2017.
 December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Emission allowances$19
 $1
 $5
 $2
 $3
 $
 $13
 $
Renewable energy certificates148
 38
 107
 107
 
 3
 
 
Natural gas, coal and power contracts24
 
 
 
 
 
 24
 
Renewable operating and development projects79
 
 
 
 
 
 
 
Other6
 
 
 
 
 
 
 3
Total gross carrying amounts276
 39
 112
 109
 3
 3
 37
 3
Accumulated amortization – natural gas, coal and power contracts(19) 
 
 
 
 
 (19) 
Accumulated amortization – renewable operating and development projects(22) 
 
 
 
 
 
 
Accumulated amortization – other(5) 
 
 
 
 
 
 (3)
Total accumulated amortization(46) 
 
 
 
 
 (19) (3)
Total intangible assets, net$230

$39

$112

$109

$3

$3

$18
 $
December 31, 2016  December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Emission allowances$19
 $1
 $6
 $2
 $4
 $
 $13
 $
$18
 $
 $5
 $2
 $3
 $
 $12
 $
Renewable energy certificates125
 36
 84
 84
 
 4
 
 
168
 46
 120
 120
 
 2
 
 
Natural gas, coal and power contracts24
 
 
 
 
 
 24
 
24
 
 
 
 
 
 24
 
Renewable operating and development projects97
 
 
 
 
 
 
 
84
 
 
 
 
 
 
 
Other6
 
 
 
 
 
 
 3
6
 
 
 
 
 
 
 3
Total gross carrying amounts271
 37
 90
 86
 4
 4
 37
 3
300
 46
 125
 122
 3
 2
 36
 3
Accumulated amortization – natural gas, coal and power contracts(17) 
 
 
 
 
 (17) 
(20) 
 
 
 
 
 (20) 
Accumulated amortization – renewable operating and development projects(23) 
 
 
 
 
 
 
(29) 
 
 
 
 
 
 
Accumulated amortization – other(5) 
 
 
 
 
 
 (3)(5) 
 
 
 
 
 
 (3)
Total accumulated amortization(45) 
 
 
 
 
 (17) (3)(54) 
 
 
 
 
 (20) (3)
Total intangible assets, net$226

$37

$90

$86

$4

$4

$20
 $
$246

$46

$125

$122

$3

$2

$16
 $



FINANCIAL STATEMENTSGOODWILL AND INTANGIBLE ASSETS


 December 31, 2017  
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Emission allowances$19
 $1
 $5
 $2
 $3
 $
 $13
 $
Renewable energy certificates148
 38
 107
 107
 
 3
 
 
Natural gas, coal and power contracts24
 
 
 
 
 
 24
 
Renewable operating and development projects79
 
 
 
 
 
 
 
Other6
 
 
 
 
 
 
 3
Total gross carrying amounts276
 39
 112
 109
 3
 3
 37
 3
Accumulated amortization – natural gas, coal and power contracts(19) 
 
 
 
 
 (19) 
Accumulated amortization – renewable operating and development projects(22) 
 
 
 
 
 
 
Accumulated amortization – other(5) 
 
 
 
 
 
 (3)
Total accumulated amortization(46) 
 
 
 
 
 (19) (3)
Total intangible assets, net$230

$39

$112

$109

$3

$3

$18
 $
During the year ended December 31, 2017, Duke Energy recorded a pretax impairment charge of $69 million on a wholly owned non-contracted wind project. The impairment was recorded within Impairment charges on Duke Energy’s Consolidated Statements of Operations. $58 million of the impairment related to property, plant and equipment and $11 million of the impairment related to a net intangible asset that was recorded in 2007 when the project was acquired. Prior to the impairment, the gross amount of the intangible asset was $18 million and the accumulated amortization was $7 million. The intangible asset was fully impaired. See Note 10 for additional information.
Amortization Expense
The following table presents amortizationAmortization expense amounts for natural gas, coal and power contracts, renewable operating projects and other intangible assets.
 December 31,
(in millions)2017
 2016
 2015
Duke Energy$7
 $6
 $5
Duke Energy Indiana1
 1
 1

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PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The table below showsassets are immaterial for the years ended December 31, 2018, 2017 and 2016, and are expected amortization expenseto be immaterial for the next five years for intangible assets as of December 31, 2017. The expected amortization expense includes estimates of emission allowances consumption and estimates of consumption of commodities such as natural gas and coal under existing contracts, as well as estimated amortization related to renewable operating projects. The amortization amounts discussed below are estimates and actual amounts may differ from these estimates due to such factors as changes in consumption patterns, sales or impairments of emission allowances or other intangible assets, delays in the in-service dates of renewable assets, additional intangible acquisitions and other events.
(in millions)2018
 2019
 2020
 2021
 2022
Duke Energy$3
 $2
 $2
 $2
 $2
Duke Energy Indiana1
 
 
 
 
2018.
12. INVESTMENTS IN UNCONSOLIDATED AFFILIATES
EQUITY METHOD INVESTMENTS
Investments in domestic and international affiliates that are not controlled by Duke Energy, but over which it has significant influence, are accounted for using the equity method.
The following table presents Duke Energy’s investments in unconsolidated affiliates accounted for under the equity method, as well as the respective equity in earnings, by segment.
Years Ended December 31,Years Ended December 31,
2017 2016 20152018 2017 2016
  Equity in
   Equity in
 Equity in
  Equity in
   Equity in
  Equity in
(in millions)Investments
 earnings
 Investments
 earnings
 earnings
Investments
 earnings
 Investments
 earnings
 Investments
earnings
Electric Utilities and Infrastructure$89
 $5
 $93
 $5
 $(2)$97
 $6
 $89
 $5
 $93
$5
Gas Utilities and Infrastructure763
 62
 566
 19
 1
1,003
 27
 763
 62
 566
19
Commercial Renewables190
 (5) 185
 (82) (6)201
 (1) 190
 (5) 185
(82)
Other133
 57
 81
 43
 76
108
 51
 133
 57
 81
43
Total$1,175

$119

$925

$(15)
$69
$1,409

$83

$1,175

$119

$925
$(15)
During the years ended December 31, 2018, 2017 2016 and 2015,2016, Duke Energy received distributions from equity investments of $108 million, $13 million $31 million and $104$31 million, respectively, which are included in Other assets within Cash Flows from Operating Activities on the Consolidated Statements of Cash Flows. During the yearyears ended December 31, 2018, and 2017, Duke Energy received distributions from equity investments of $137 million and $281 million, respectively, which are included in Return of investment capital within Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows.
During the yearyears ended December 31, 2018, and 2017, and the two months ended December 31, 2016, and the yearsyear ended October 31, 2016, and 2015, Piedmont received distributions from equity investments of $1 million, $4 million, $1 million $26 million and $25$26 million, respectively, which are included in Other assets within Cash Flows from Operating Activities and $3 million, $2 million, $1 million $18 million and $2$18 million, respectively, which are included within Cash Flows from Investing Activities on the Consolidated Statements of Cash Flows.
Significant investments in affiliates accounted for under the equity method are discussed below.



FINANCIAL STATEMENTSINVESTMENTS IN UNCONSOLIDATED AFFILIATES


Electric Utilities and Infrastructure
Duke Energy owns a 50 percent interest in Duke-American Transmission Co. (DATC)DATC and in Pioneer, Transmission, LLC (Pioneer), which build, own and operate electric transmission facilities in North America.

191

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Gas Utilities and Infrastructure
The table below outlines Duke Energy's ownership interests in natural gas pipeline companies and natural gas storage facilities.
  Investment Amount (in millions)  Investment Amount (in millions)
Ownership December 31, December 31,Ownership December 31, December 31,
Entity NameInterest 2017 2016Interest 2018 2017
Pipeline Investments          
Atlantic Coast Pipeline, LLC(a)
47% $397
 $265
47% $797
 $397
Sabal Trail Transmission, LLC7.5% 219
 140
7.5% 112
(d) 
219
Constitution Pipeline, LLC(a)
24% 81
 82
24% 25
 81
Cardinal Pipeline Company, LLC(b)
21.49% 11
 16
21.49% 10
 11
Storage Facilities          
Pine Needle LNG Company, LLC(b)
45% 13
 16
45% 13
 13
Hardy Storage Company, LLC(b)
50% 42
 47
50% 46
 42
Total Investments(c)
  $763
 $566
  $1,003
 $763
(a)During the year ended December 31, 2017, Piedmont transferred its share of ownership interest in ACP and Constitution to a wholly owned subsidiary of Duke Energy at book value.
(b)Piedmont owns the Cardinal, Pine Needle and Hardy Storage investments.
(c)Duke Energy includes purchase accounting adjustments related to Piedmont.
(d)Sabal Trail returned capital of $112 million during the year ended December 31, 2018.
In October 2017, Duke Energy entered into a guarantee agreement to support its share of the ACP revolving credit facility. See Note 7 for additional information. As a result of the financing, ACP returned capital of $265 million to Duke Energy.
Piedmont sold its 15 percent membership interest in SouthStar on October 3, 2016, for $160 million resulting in an after tax gain of $81 million during the year ended October 31, 2016. Piedmont's Equity in Earnings in SouthStar was $19 million for the yearsyear ended October 31, 2016,2016.
During the fourth quarter of 2018, ACP received several adverse court rulings as described in Note 4. As a result, Duke Energy evaluated this investment for impairment and 2015.determined that fair value approximated carrying value and therefore no impairment was necessary.
For regulatory matters and other information on the ACP, Sabal Trail and Constitution investments, see Notes 4 and 17.
Commercial Renewables
In 2016, Duke Energy sold its interest in three of the Catamount Sweetwater, LLC wind farm projects. Duke Energy has a 47 percent ownership interest in each of the two other Catamount Sweetwater, LLC wind farm projects and 50 percent interest in DS Cornerstone, LLC, which owns wind farm projects in the U.S.
Impairment of Equity Method Investments
Duke Energy evaluated its investment in Constitution for OTTI as of December 31, 2017. Our impairment assessment uses a discounted cash flow income approach, including consideration of the severity and duration of any decline in fair value of our investment in the project. Our key inputs involve significant management judgments and estimates, including projections of the project’s cash flows, selection of a discount rate and probability weighting of potential outcomes of legal and regulatory proceedings. Based upon these estimates using information known as of December 31, 2017, the fair value of Duke Energy's investment in Constitution approximated its carrying value. As a result, Duke Energy did not recognize any impairment charge inDuring the year ended December 31, 2017. However,2018, Duke Energy recorded an OTTI of the Constitution investment of $55 million within Equity in earnings of unconsolidated affiliates on Duke Energy's Consolidated Statements of Operations. The charge represents the excess carrying value over the estimated fair value of the project, which was based on a Level 3 Fair Value measurement that was determined from the income approach using discounted cash flows. The impairment was primarily due to the FERC’s January 2018 rulingrecent actions taken by the courts and regulators to uphold the resulting increase in uncertainty, Duke Energy is evaluating the potential to recognize a pretax impairment charge on its investment in Constitution during the first quarter of 2018 of up to the current carrying amountNYSDEC's denial of the investment, net of salvage valuecertification and any cashuncertainty associated with the remaining legal and working capital returned.regulatory challenges. For additional information on the Constitution investment, see Note 4.
During the year ended December 31, 2016, Duke Energy recorded an OTTI of certain wind project investments. The $71 million pretax impairment was recorded within Equity in earnings (losses) of unconsolidated affiliates on Duke Energy's Consolidated Statements of Operations. The other-than-temporary decline in value of these investments was primarily attributable to a sustained decline in market pricing where the wind investments are located, projected net losses for the projects and a reduction in the projected cash distribution to the class of investment owned by Duke Energy.
Other
Duke Energy owns a 17.5 percent indirect interest in NMC, which owns and operates a methanol and MTBE business in Jubail, Saudi Arabia. Duke Energy's economic ownership interest decreased from 25 percent to 17.5 percent with the successful startup of NMC's polyacetal production facility in 2017. Duke Energy retains 25 percent of the board representation and voting rights of NMC. The investment in NMC is accounted for under the equity method of accounting.



192

FINANCIAL STATEMENTSRELATED PARTY TRANSACTIONS
PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

13. RELATED PARTY TRANSACTIONS
The Subsidiary Registrants engage in related party transactions in accordance with the applicable state and federal commission regulations. Refer to the Consolidated Balance Sheets of the Subsidiary Registrants for balances due to or due from related parties. Material amounts related to transactions with related parties included in the Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Duke Energy Carolinas          
Corporate governance and shared service expenses(a)
$858
 $831
 $914
$985
 $858
 $831
Indemnification coverages(b)
23
 22
 24
22
 23
 22
JDA revenue(c)
49
 38
 51
84
 49
 38
JDA expense(c)
145
 156
 183
207
 145
 156
Intercompany natural gas purchases(d)
9
 2
 
15
 9
 2
Progress Energy          
Corporate governance and shared service expenses(a)
$736
 $710
 $712
$906
 $736
 $710
Indemnification coverages(b)
38
 35
 38
34
 38
 35
JDA revenue(c)
145
 156
 183
207
 145
 156
JDA expense(c)
49
 38
 51
84
 49
 38
Intercompany natural gas purchases(d)
77
 19
 
78
 77
 19
Duke Energy Progress          
Corporate governance and shared service expenses(a)
$438
 $397
 $403
$577
 $438
 $397
Indemnification coverages(b)
15
 14
 16
13
 15
 14
JDA revenue(c)
145
 156
 183
207
 145
 156
JDA expense(c)
49
 38
 51
84
 49
 38
Intercompany natural gas purchases(d)
77
 19
 
78
 77
 19
Duke Energy Florida          
Corporate governance and shared service expenses(a)
$298
 $313
 $309
$329
 $298
 $313
Indemnification coverages(b)
23
 21
 22
21
 23
 21
Duke Energy Ohio          
Corporate governance and shared service expenses(a)
$363
 $356
 $342
$374
 $363
 $356
Indemnification coverages(b)
5
 5
 6
5
 5
 5
Duke Energy Indiana          
Corporate governance and shared service expenses(a)
$370
 $366
 $349
$405
 $370
 $366
Indemnification coverages(b)
8
 8
 9
7
 8
 8
Piedmont          
Corporate governance and shared service expenses(a)
$50
    $170
 $50
  
Indemnification coverages(b)

2
    2
 2
  
Intercompany natural gas sales(d)

86
    93
 86
  
Natural gas storage and transportation costs(e)
25
 25
  
(a)The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other on the Consolidated Statements of Operations and Comprehensive Income.
(b)The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Consolidated Statements of Operations and Comprehensive Income.
(c)Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Consolidated Statements of Operations and Comprehensive Income.
(d)Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Regulated natural gas revenues,Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases inas a component of Fuel used in electric generation and purchased power on their respective Consolidated Statements of Operations and Comprehensive Income. The amountsThese intercompany revenues and expenses are not eliminated in accordance with rate-based accounting regulations.consolidation. For the two months ended December 31, 2016, and for sales made subsequent to the acquisition for the year ended October 31, 2016, Piedmont recorded $14 million and $7 million, respectively, of natural gas sales with Duke Energy. For sales made prior to the acquisition for the year ended October 31, 2016, and for the year ended October 31, 2015, Piedmont recorded $74 million and $83 million, respectively of natural gas sales with Duke Energy.



193

PART II
FINANCIAL STATEMENTSRELATED PARTY TRANSACTIONS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

(e)Piedmont has related party transactions as a customer of its equity method investments in Pine Needle, Hardy Storage, and Cardinal natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Consolidated Statements of Operations and Comprehensive Income. For the two months ended December 31, 2016, and for the year ended October 31, 2016, Piedmont recorded $6 million and $29 million, respectively, of natural gas storage and transportation costs.
In addition to the amounts presented above, the Subsidiary Registrants have other affiliate transactions, including rental of office space, participation in a money pool arrangement, other operational transactions and their proportionate share of certain charged expenses. See Note 6 for more information regarding money pool. These transactions of the Subsidiary Registrants were not material forare incurred in the years ended December 31, 2017, 2016ordinary course of business and 2015.are eliminated in consolidation.
As discussed in Note 17, certain trade receivables have been sold by Duke Energy Ohio and Duke Energy Indiana to CRC, an affiliate formed by a subsidiary of Duke Energy. The proceeds obtained from the sales of receivables are largely cash but do include a subordinated note from CRC for a portion of the purchase price.
Refer to Note 2 for further information on the sale of the Midwest Generation Disposal Group.
Equity Method Investments
Piedmont has related party transactions as a customer of its equity method investments in natural gas storage and transportation facilities. The following table presents expenses that are included in Cost of natural gas on Piedmont's Consolidated Statements of Operations and Comprehensive Income.
  Year Ended December 31,Two Months Ended December 31,Years Ended October 31,
(in millions)Type of expense2017201620162015
CardinalTransportation Costs$8
$2
$9
$9
Pine NeedleNatural Gas Storage Costs8
2
11
11
Hardy StorageNatural Gas Storage Costs9
2
9
9
Total $25
$6
$29
$29
Piedmont had accounts payable to its equity method investments of $2 million at December 31, 2017, and 2016 related to these transactions. These amounts are included in Accounts payable on the Consolidated Balance Sheets.
Intercompany Income Taxes
Duke Energy and the Subsidiary Registrants file a consolidated federal income tax return and other state and jurisdictional returns. The Subsidiary Registrants have a tax sharing agreement with Duke Energy for the allocation of consolidated tax liabilities and benefits. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. The following table includes the balance of intercompany income tax receivables and payables for the Subsidiary Registrants.
Duke
 Duke
Duke
Duke
Duke
 Duke
 Duke
Duke
Duke
Duke
 
Energy
Progress
Energy
Energy
Energy
Energy
 Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
December 31, 2018 
Intercompany income tax receivable$52
$47
$29
$
$
$8
$
Intercompany income tax payable


16
3

45
 
December 31, 2017  
Intercompany income tax receivable$
$168
$
$44
$22
$
$7
$
$168
$
$44
$22
$
$7
Intercompany income tax payable44

21


35

44

21


35

 
December 31, 2016 
Intercompany income tax receivable$1
$
$
$37
$
$
$
Intercompany income tax payable
37
90

1
3
38
14. DERIVATIVES AND HEDGING
The Duke Energy Registrants use commodity and interest rate contracts to manage commodity price risk and interest rate risk. The primary use of commodity derivatives is to hedge the generation portfolio against changes in the prices of electricity and natural gas. Piedmont enters into natural gas supply contracts to provide diversification, reliability and natural gas cost benefits to its customers. Interest rate swaps are used to manage interest rate risk associated with borrowings.
All derivative instruments not identified as NPNS are recorded at fair value as assets or liabilities on the Consolidated Balance Sheets. Cash collateral related to derivative instruments executed under master netting arrangements is offset against the collateralized derivatives on the Consolidated Balance Sheets. The cash impacts of settled derivatives are recorded as operating activities on the Consolidated Statements of Cash Flows.
INTEREST RATE RISK
The Duke Energy Registrants are exposed to changes in interest rates as a result of their issuance or anticipated issuance of variable-rate and fixed-rate debt and commercial paper. Interest rate risk is managed by limiting variable-rate exposures to a percentage of total debt and by monitoring changes in interest rates. To manage risk associated with changes in interest rates, the Duke Energy Registrants may enter into interest rate swaps, U.S. Treasury lock agreements and other financial contracts. In anticipation of certain fixed-rate debt issuances, a series of forward-starting interest rate swaps or Treasury locks may be executed to lock in components of current market interest rates. These instruments are later terminated prior to or upon the issuance of the corresponding debt.

194

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Cash Flow Hedges
For a derivative designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the effective portion of the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Amounts for interest rate contracts are reclassified to earnings as interest expense over the term of the related debt. See the Consolidated Statements of Changes in Equity for gainsGains and losses reclassified out of AOCI for the years ended December 31, 2018, 2017 and 2016.2016 were not material. Duke Energy's interest rate derivatives designated as hedges include interest rate swaps used to hedge existing debt within the Commercial Renewables business.
Undesignated Contracts
Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting andor contracts that do not qualify for hedge accounting.



FINANCIAL STATEMENTSDERIVATIVES AND HEDGING


Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense.Expense on the Duke Energy Registrant's Consolidated Statements of Operations and Comprehensive Income.
In August 2016, Duke Energy unwound $1.4 billion of forward-starting interest rate swaps associated with the Piedmont acquisition financing described in Note 6.financing. The swaps were considered undesignated as they did not qualify for hedge accounting. Losses on the swaps of $190 million are included within Interest Expense on the Consolidated Statements of Operations for the year ended December 31, 2016. See Note 2 for additional information related to the Piedmont acquisition.
The following tables show notional amounts of outstanding derivatives related to interest rate risk.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
Cash flow hedges(a)
$660
 $
 $
 $
 $
 $
$923
 $
 $
 $
 $
 $
Undesignated contracts927
 400
 500
 250
 250
 27
1,721
 300
 1,200
 650
 550
 27
Total notional amount(a)$1,587
 $400
 $500
 $250
 $250
 $27
$2,644
 $300
 $1,200
 $650
 $550
 $27
December 31, 2016December 31, 2017
  Duke
   Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
Cash flow hedges(a)
$750
 $
 $
 $
 $
 $
$660
 $
 $
 $
 $
 $
Undesignated contracts927
 400
 500
 250
 250
 27
927
 400
 500
 250
 250
 27
Total notional amount$1,677
 $400
 $500
 $250
 $250
 $27
$1,587
 $400
 $500
 $250
 $250
 $27
(a)Duke Energy includes amounts related to consolidated VIEs of $422 million in cash flow hedges and $194 million in undesignated contracts as of December 31, 2018, and $660 million and $750 million atin cash flow hedges as of December 31, 2017, and 2016, respectively. During 2016, Duke Energy entered into interest rate swaps related to solar financing with an outstanding notional amount of $300 million, including $81 million of four-year swaps and $219 million of 18-year swaps, at December 31, 2016. See note 6 for additional information related to the solar facilities financing.2017.
COMMODITY PRICE RISK
The Duke Energy Registrants are exposed to the impact of changes in the prices of electricity purchased and sold in bulk power markets and coal and natural gas purchases, including Piedmont's natural gas supply contracts. Exposure to commodity price risk is influenced by a number of factors including the term of contracts, the liquidity of markets and delivery locations. For the Subsidiary Registrants, bulk power electricity and coal and natural gas purchases flow through fuel adjustment clauses, formula based contracts or other cost sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce gas cost volatility for customers.

195

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Volumes
The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown.
 December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
 Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Electricity (gigawatt-hours)15,286
 
 
 
 
 1,786
 13,500
 
Natural gas (millions of dekatherms)739
 121
 169
 166
 3
 
 1
 448
 December 31, 2017
   Duke
   Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
  
 Energy
 Carolinas
 Energy
 Progress
 Florida
 Indiana
 Piedmont
Electricity (gigawatt-hours)34
 
 
 
 
 34
 
Natural gas (millions of dekatherms)770
 105
 183
 133
 50
 2
 480
 December 31, 2016
   Duke
   Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
  
 Energy
 Carolinas
 Energy
 Progress
 Florida
 Indiana
 Piedmont
Electricity (gigawatt-hours)147
 
 
 
 
 147
 
Natural gas (millions of dekatherms)890
 91
 269
 118
 151
 1
 529



196

PART II
FINANCIAL STATEMENTSDERIVATIVES AND HEDGING
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

LOCATION AND FAIR VALUE OF DERIVATIVE ASSETS AND LIABILITIES RECOGNIZED IN THE CONSOLIDATED BALANCE SHEETS
The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown.
Derivative Assets December 31, 2018
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Commodity Contracts                
Not Designated as Hedging Instruments                
Current $35
 $2
 $2
 $2
 $
 $6
 $23
 $3
Noncurrent 4
 1
 2
 2
 
 
 
 
Total Derivative Assets – Commodity Contracts $39
 $3
 $4
 $4
 $
 $6
 $23
 $3
Interest Rate Contracts                
Designated as Hedging Instruments                
Current $1
 $
 $
 $
 $
 $
 $
 $
Noncurrent 3
 
 
 
 
 
 
 
Not Designated as Hedging Instruments                
Current 2
 
 
 
 
 
 
 
Noncurrent 12
 
 
 
 
 
 
 
Total Derivative Assets – Interest Rate Contracts $18

$

$

$

$

$

$
 $
Total Derivative Assets $57
 $3
 $4
 $4
 $
 $6
 $23
 $3
Derivative Liabilities December 31, 2018
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Commodity Contracts                
Not Designated as Hedging Instruments                
Current $33
 $14
 $10
 $5
 $6
 $
 $
 $8
Noncurrent 158
 10
 15
 6
 
 
 
 133
Total Derivative Liabilities – Commodity Contracts $191
 $24
 $25
 $11
 $6
 $
 $
 $141
Interest Rate Contracts                
Designated as Hedging Instruments                
Current $12
 $
 $
 $
 $
 $
 $
 $
Noncurrent 6
 
 
 
 
 
 
 
Not Designated as Hedging Instruments                
Current 23
 9
 13
 11
 2
 1
 
 
Noncurrent 10
 
 6
 5
 1
 4
 
 
Total Derivative Liabilities – Interest Rate Contracts $51
 $9
 $19
 $16
 $3
 $5
 $
 $
Total Derivative Liabilities $242
 $33
 $44
 $27
 $9
 $5
 $
 $141



FINANCIAL STATEMENTSDERIVATIVES AND HEDGING


Derivative Assets December 31, 2017
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Commodity Contracts                
Not Designated as Hedging Instruments                
Current $34
 $2
 $2
 $1
 $1
 $1
 $27
 $2
Noncurrent 1
 
 1
 1
 
 
 
 
Total Derivative Assets – Commodity Contracts $35
 $2
 $3
 $2
 $1
 $1
 $27

$2
Interest Rate Contracts                
Designated as Hedging Instruments                
Current $1
 $
 $
 $
 $
 $
 $
 $
Noncurrent 15
 
 
 
 
 
 
 
Total Derivative Assets – Interest Rate Contracts $16
 $
 $
 $
 $
 $
 $
 $
Total Derivative Assets $51
 $2
 $3
 $2
 $1
 $1
 $27
 $2
Derivative Liabilities December 31, 2017
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Commodity Contracts                
Not Designated as Hedging Instruments                
Current $36
 $6
 $18
 $8
 $10
 $
 $
 $11
Noncurrent 146
 4
 10
 4
 
 
 
 131
Total Derivative Liabilities – Commodity Contracts $182
 $10
 $28
 $12
 $10
 $
 $
 $142
Interest Rate Contracts                
Designated as Hedging Instruments                
Current $29
 $25
 $
 $
 $
 $
 $
 $
Noncurrent 6
 
 
 
 
 
 
 
Not Designated as Hedging Instruments                
Current 1
 
 1
 
 
 1
 
 
Noncurrent 12
 
 7
 6
 2
 4
 
 
Total Derivative Liabilities – Interest Rate Contracts $48
 $25
 $8
 $6
 $2
 $5
 $
 $
Total Derivative Liabilities $230
 $35
 $36
 $18
 $12
 $5
 $
 $142

197

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)


Derivative Assets December 31, 2016
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Commodity Contracts                
Not Designated as Hedging Instruments                
Current $108
 $23
 $61
 $35
 $26
 $4
 $16
 $3
Noncurrent 32
 10
 21
 10
 11
 1
 
 
Total Derivative Assets – Commodity Contracts $140
 $33
 $82
 $45
 $37
 $5
 $16

$3
Interest Rate Contracts                
Designated as Hedging Instruments                
Noncurrent $19
 $
 $
 $
 $
 $
 $
 $
Not Designated as Hedging Instruments                
Current 3
 
 3
 1
 2
 
 
 
Total Derivative Assets – Interest Rate Contracts $22
 $
 $3
 $1
 $2
 $
 $
 $
Total Derivative Assets $162
 $33
 $85
 $46
 $39
 $5
 $16
 $3
Derivative Liabilities December 31, 2016
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Commodity Contracts                
Not Designated as Hedging Instruments                
Current $43
 $
 $12
 $
 $12
 $
 $2
 $35
Noncurrent 166
 1
 7
 1
 
 
 
 152
Total Derivative Liabilities – Commodity Contracts $209
 $1
 $19
 $1
 $12
 $
 $2
 $187
Interest Rate Contracts                
Designated as Hedging Instruments                
Current $8
 $
 $
 $
 $
 $
 $
 $
Noncurrent 8
 
 
 
 
 
 
 
Not Designated as Hedging Instruments                
Current 1
 
 
 
 
 1
 
 
Noncurrent 26
 15
 6
 6
 
 5
 
 
Total Derivative Liabilities – Interest Rate Contracts $43
 $15
 $6
 $6
 $
 $6
 $
 $
Total Derivative Liabilities $252
 $16
 $25
 $7
 $12
 $6
 $2
 $187
FINANCIAL STATEMENTSDERIVATIVES AND HEDGING


198

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

OFFSETTING ASSETS AND LIABILITIES
The following tables present the line items on the Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The Grossgross amounts offset in the tables below show the effect of these netting arrangements on financial position and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below.
Derivative Assets December 31, 2017   December 31, 2018  
   Duke
   Duke
 Duke
 Duke
 Duke
     Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
   Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
 Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current                                
Gross amounts recognized $35
 $2
 $2
 $1
 $1
 $1
 $27
 $2
 $38
 $2
 $2
 $2
 $
 $6
 $23
 $3
Gross amounts offset 
 
 
 
 
 
 
 
 (3) (2) (2) (2) 
 
 
 
Net amounts presented in Current Assets: Other $35

$2

$2

$1

$1

$1

$27
 $2
 $35

$

$

$

$

$6

$23
 $3
Noncurrent                                
Gross amounts recognized $16
 $
 $1
 $1
 $
 $
 $
 $
 $19
 $1
 $2
 $2
 $
 $
 $
 $
Gross amounts offset 
 
 
 
 
 
 
 
 (3) (1) (2) (2) 
 
 
 
Net amounts presented in Other Noncurrent Assets: Other $16
 $
 $1
 $1
 $
 $
 $
 $
 $16
 $
 $
 $
 $
 $
 $
 $
Derivative Liabilities December 31, 2017   December 31, 2018  
   Duke
   Duke
 Duke
 Duke
 Duke
     Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
   Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
 Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current                                
Gross amounts recognized $66
 $31
 $19
 $8
 $10
 $1
 $
 $11
 $68
 $23
 $23
 $16
 $8
 $1
 $
 $8
Gross amounts offset (3) (2) (2) (2) 
 
 
 
 (4) (2) (2) (2) 
 
 
 
Net amounts presented in Current Liabilities: Other $63
 $29
 $17
 $6
 $10
 $1
 $
 $11
 $64
 $21
 $21
 $14
 $8
 $1
 $
 $8
Noncurrent                                
Gross amounts recognized $164
 $4
 $17
 $10
 $2
 $4
 $
 $131
 $174
 $10
 $21
 $11
 $1
 $4
 $
 $133
Gross amounts offset (1) 
 (1) (1) 
 
 
 
 (3) (1) (2) (2) 
 
 
 
Net amounts presented in Other Noncurrent Liabilities: Other $163
 $4
 $16
 $9
 $2
 $4
 $
 $131
 $171
 $9
 $19
 $9
 $1
 $4
 $
 $133



FINANCIAL STATEMENTSDERIVATIVES AND HEDGING


199

PART II
Derivative Assets December 31, 2017
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current                
Gross amounts recognized $35
 $2
 $2
 $1
 $1
 $1
 $27
 $2
Gross amounts offset 
 
 
 
 
 
 
 
Net amounts presented in Current Assets: Other $35
 $2
 $2
 $1
 $1
 $1
 $27
 $2
Noncurrent                
Gross amounts recognized $16
 $
 $1
 $1
 $
 $
 $
 $
Gross amounts offset 
 
 
 
 
 
 
 
Net amounts presented in Other Noncurrent Assets: Other $16
 $
 $1
 $1
 $
 $
 $
 $
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Derivative Assets December 31, 2016
    Duke
   Duke
 Duke
 Duke
 Duke
  
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current                
Gross amounts recognized $111
 $23
 $64
 $36
 $28
 $4
 $16
 $3
Gross amounts offset (11) 
 (11) 
 (11) 
 
 
Net amounts presented in Current Assets: Other $100
 $23
 $53
 $36
 $17
 $4
 $16
 $3
Noncurrent                
Gross amounts recognized $51
 $10
 $21
 $10
 $11
 $1
 $
 $
Gross amounts offset (2) (1) (1) (1) 
 
 
 
Net amounts presented in Other Noncurrent Assets: Other $49
 $9
 $20
 $9
 $11
 $1
 $
 $
Derivative Liabilities December 31, 2016 December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
     Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
   Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
 Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current                                
Gross amounts recognized $52
 $
 $12
 $
 $12
 $1
 $2
 $35
 $66
 $31
 $19
 $8
 $10
 $1
 $
 $11
Gross amounts offset (11) 
 (11) 
 (11) 
 
 
 (3) (2) (2) (2) 
 
 
 
Net amounts presented in Current Liabilities: Other $41
 $
 $1
 $
 $1
 $1
 $2
 $35
 $63
 $29
 $17
 $6
 $10
 $1
 $
 $11
Noncurrent                                
Gross amounts recognized $200
 $16
 $13
 $7
 $
 $5
 $
 $152
 $164
 $4
 $17
 $10
 $2
 $4
 $
 $131
Gross amounts offset (2) (1) (1) (1) 
 
 
 
 (1) 
 (1) (1) 
 
 
 
Net amounts presented in Other Noncurrent Liabilities: Other $198
 $15
 $12
 $6
 $
 $5
 $
 $152
 $163
 $4
 $16
 $9
 $2
 $4
 $
 $131
OBJECTIVE CREDIT CONTINGENT FEATURES
Certain derivative contracts contain objective credit contingent features. These features include the requirement to post cash collateral or letters of credit if specific events occur, such as a credit rating downgrade below investment grade. The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit-risk-related payment provisions.
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
  Duke
   Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
Energy
 Carolinas
 Energy
 Progress
 Florida
Aggregate fair value of derivatives in a net liability position$59
 $35
 $25
 $15
 $10
$44
 $19
 $25
 $25
 $
Fair value of collateral already posted
 
 
 
 

 
 
 
 
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered59
 35
 25
 15
 10
44
 19
 25
 25
 
December 31, 2016December 31, 2017
  Duke
   Duke
 Duke
  Duke
   Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
Energy
 Carolinas
 Energy
 Progress
 Florida
Aggregate fair value of derivatives in a net liability position$34
 $16
 $18
 $6
 $12
$59
 $35
 $25
 $15
 $10
Fair value of collateral already posted
 
 
 
 

 
 
 
 
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered34
 16
 18
 6
 12
59
 35
 25
 15
 10
The Duke Energy Registrants have elected to offset cash collateral and fair values of derivatives. For amounts to be netted, the derivative and cash collateral must be executed with the same counterparty under the same master netting arrangement.



FINANCIAL STATEMENTSINVESTMENTS IN DEBT AND EQUITY SECURITIES


15. INVESTMENTS IN DEBT AND EQUITY SECURITIES
The Duke Energy Registrants classify theirEnergy's investments in debt and equity securities as either trading or available-for-sale.

200

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

TRADING SECURITIES
Piedmont's investments in debt and equity securities held in rabbi trusts associated with certain deferred compensation plans are classified as trading securities. The fair value of these investments was $1 million and $5 million as of December 31, 2017, and 2016, respectively.
AVAILABLE-FOR-SALE (AFS) SECURITIES
All other investments in debt and equity securities are classified as AFS.
Duke Energy’s AFS securities are primarily comprised of investments held in (i) the nuclear decommissioning trust funds (NDTF)NDTF at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, (ii) the grantor trusts at Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana related to OPEB plans and (iii) Bison. The Duke Energy Registrants classify investments in debt securities as AFS and investments in equity securities as FV-NI.
For investments in debt securities classified as AFS, the unrealized gains and losses are included in other comprehensive income until realized, at which time, they are reported though net income. For investments in equity securities classified as FV-NI, both realized and unrealized gains and losses are reported through net income. Substantially all of Duke Energy's investments in debt and equity securities qualify for regulatory accounting, and accordingly, all associated realized and unrealized gains and losses on these investments are deferred as a regulatory asset or liability.
Duke Energy classifies all otherthe majority of investments in debt and equity securities as long term, unless otherwise noted.
Investment Trusts
The investments within the NDTF investments and the Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana grantor trusts (Investment Trusts)Investment Trusts are managed by independent investment managers with discretion to buy, sell and invest pursuant to the objectives set forth by the trust agreements. The Duke Energy Registrants have limited oversight of the day-to-day management of these investments. As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt and equity securities within the Investment Trusts are considered OTTIs and are recognized immediately.
Investments within the Investment Trusts generally qualify forimmediately and deferred to regulatory accounting and accordingly realized and unrealized gains and losses are generally deferred as a regulatory asset or liability.
Substantially all amounts of the Duke Energy Registrants' gross unrealized holding losses as of December 31, 2017, and 2016, are considered OTTIs on investments within Investment Trusts that have been recognized immediately as a regulatory asset.accounts where appropriate.
Other AFS Securities
Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment is other-than-temporarily impaired. If an OTTI exists, the unrealized loss is included in earnings based on the criteria discussed below.
The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value should be considered other-than-temporary. Criteria used to evaluate whetherIf an impairment associated with equity securities is other-than-temporary includes, but is not limited to, (i) the length of time over which the market value has been lower than the cost basis of the investment, (ii) the percentage decline compared to the cost of the investment and (iii) management’s intent and ability to retain its investment for a period of time sufficient to allow for any anticipated recovery in market value. If a decline in fair value is determined to be other-than-temporary, the investment is written down to its fair value through a charge to earnings.
If the entity does not have an intent to sell a debt security and it is not more likely than not management will be required to sell the debt security before the recovery of its cost basis, the impairment write-down to fair value would be recorded as a component of other comprehensive income, except for when it is determined a credit loss exists. In determining whether a credit loss exists, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than the amortized cost basis, (ii) changes in the financial condition of the issuer of the security, or in the case of an asset backed security, the financial condition of the underlying loan obligors, (iii) consideration of underlying collateral and guarantees of amounts by government entities, (iv) ability of the issuer of the security to make scheduled interest or principal payments and (v) any changes to the rating of the security by rating agencies. If a credit lossOTTI exists, the amount of impairment write-down to fair value is split between credit loss and other factors. The amount related tounrealized credit loss is recognizedincluded in earnings. The amount related to other factors is recognized in other comprehensive income. There were no material credit losses as of December 31, 2017,2018, and 2016.2017.
Other Investments amounts are recorded in Other within Other Noncurrent Assets on the Consolidated Balance Sheets.

201

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

DUKE ENERGY
The following table presents the estimated fair value of investments in AFS securities.debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
Gross
 Gross
   Gross
 Gross
  Gross
 Gross
   Gross
 Gross
  
Unrealized
 Unrealized
   Unrealized
 Unrealized
  Unrealized
 Unrealized
   Unrealized
 Unrealized
  
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 
Losses(a)

 Fair Value
Gains
 Losses
 Fair Value
 Gains
 Losses
 Fair Value
NDTF         
           
  
Cash and cash equivalents$
 $
 $115
 $
 $
 $111
$
 $
 $88
 $
 $
 $115
Equity securities2,805
 27
 4,914
 2,092
 54
 4,106
2,402
 95
 4,475
 2,805
 27
 4,914
Corporate debt securities17
 2
 570
 10
 8
 528
4
 13
 566
 17
 2
 570
Municipal bonds4
 3
 344
 3
 10
 331
1
 4
 353
 4
 3
 344
U.S. government bonds11
 7
 1,027
 10
 8
 984
14
 12
 1,076
 11
 7
 1,027
Other debt securities
 1
 118
 
 3
 124

 2
 148
 
 1
 118
Total NDTF$2,837
 $40
 $7,088
 $2,115
 $83
 $6,184
Total NDTF Investments$2,421
 $126
 $6,706
 $2,837
 $40
 $7,088
Other Investments 
  
  
  
  
  
 
  
  
  
  
  
Cash and cash equivalents$
 $
 $15
 $
 $
 $25
$
 $
 $22
 $
 $
 $15
Equity securities59
 
 123
 38
 
 104
36
 1
 99
 59
 
 123
Corporate debt securities1
 
 57
 1
 1
 66

 2
 60
 1
 
 57
Municipal bonds2
 1
 83
 2
 1
 82

 1
 85
 2
 1
 83
U.S. government bonds
 
 41
 
 1
 51
1
 
 45
 
 
 41
Other debt securities
 1
 44
 
 2
 42

 1
 58
 
 1
 44
Total Other Investments$62
 $2
 $363
 $41
 $5
 $370
$37
 $5
 $369
 $62
 $2
 $363
Total Investments$2,899
 $42
 $7,451
 $2,156
 $88
 $6,554
$2,458
 $131
 $7,075
 $2,899
 $42
 $7,451



FINANCIAL STATEMENTSINVESTMENTS IN DEBT AND EQUITY SECURITIES


The table below summarizes the maturity date for debt securities.
(in millions)December 31, 2017
December 31, 2018
Due in one year or less$117
$98
Due after one through five years552
501
Due after five through 10 years554
570
Due after 10 years1,061
1,222
Total$2,284
$2,391
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the year ended December 31, 2018, and from sales of AFS securities for the years ended December 31, 2017, and 2016, were as follows.
Years Ended December 31,Year Ended December 31,
(in millions)2017
 2016
 2015
2018
FV-NI: 
Realized gains$202
 $246
 $193
$168
Realized losses160
 187
 98
126
AFS: 
Realized gains22
Realized losses51
202

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Years Ended December 31,
(in millions)2017
 2016
Realized gains$202
 $246
Realized losses160
 187
DUKE ENERGY CAROLINAS
The following table presents the estimated fair value of investments in AFS securities.debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
Gross
 Gross
   Gross
 Gross
  Gross
 Gross
   Gross
 Gross
  
Unrealized
 Unrealized
   Unrealized
 Unrealized
  Unrealized
 Unrealized
   Unrealized
 Unrealized
  
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 
Losses(a)

 Fair Value
Gains
 Losses
 Fair Value
 Gains
 Losses
 Fair Value
NDTF           
           
Cash and cash equivalents$
 $
 $32
 $
 $
 $18
$
 $
 $29
 $
 $
 $32
Equity securities1,531
 12
 2,692
 1,157
 28
 2,245
1,309
 54
 2,484
 1,531
 12
 2,692
Corporate debt securities9
 2
 359
 5
 6
 354
2
 9
 341
 9
 2
 359
Municipal bonds
 1
 60
 1
 2
 67

 1
 81
 
 1
 60
U.S. government bonds3
 4
 503
 2
 5
 458
5
 8
 475
 3
 4
 503
Other debt securities
 1
 112
 
 3
 116

 2
 143
 
 1
 112
Total NDTF
$1,543
 $20
 $3,758
 $1,165
 $44
 $3,258
Other Investments 
  
  
  
  
  
Other debt securities$
 $
 $
 $
 $1
 $3
Total Other Investments$
 $
 $
 $
 $1
 $3
Total Investments$1,543
 $20
 $3,758
 $1,165
 $45
 $3,261
Total NDTF Investments$1,316
 $74
 $3,553
 $1,543
 $20
 $3,758
The table below summarizes the maturity date for debt securities.
(in millions)December 31, 2017
December 31, 2018
Due in one year or less$9
$6
Due after one through five years204
142
Due after five through 10 years300
303
Due after 10 years521
589
Total$1,034
$1,040



FINANCIAL STATEMENTSINVESTMENTS IN DEBT AND EQUITY SECURITIES


Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the year ended December 31, 2018, and from sales of AFS securities for the years ended December 31, 2017, and 2016, were as follows.
Years Ended December 31,Year Ended December 31,
(in millions)2017
 2016
 2015
2018
FV-NI: 
Realized gains$135
 $157
 $158
$89
Realized losses103
 121
 83
73
AFS: 
Realized gains19
Realized losses35
203

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Years Ended December 31,
(in millions)2017
 2016
Realized gains$135
 $157
Realized losses103
 121
PROGRESS ENERGY
The following table presents the estimated fair value of investments in AFS securities.debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
Gross
 Gross
   Gross
 Gross
  Gross
 Gross
   Gross
 Gross
  
Unrealized
 Unrealized
   Unrealized
 Unrealized
  Unrealized
 Unrealized
   Unrealized
 Unrealized
  
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 
Losses(a)

 Fair Value
Gains
 Losses
 Fair Value
 Gains
 Losses
 Fair Value
NDTF                      
Cash and cash equivalents$
 $
 $83
 $
 $
 $93
$
 $
 $59
 $
 $
 $83
Equity securities1,274
 15
 2,222
 935
 26
 1,861
1,093
 41
 1,991
 1,274
 15
 2,222
Corporate debt securities8
 
 211
 5
 2
 174
2
 4
 225
 8
 
 211
Municipal bonds4
 2
 284
 2
 8
 264
1
 3
 272
 4
 2
 284
U.S. government bonds8
 3
 524
 8
 3
 526
9
 4
 601
 8
 3
 524
Other debt securities
 
 6
 
 
 8

 
 5
 
 
 6
Total NDTF$1,294
 $20
 $3,330
 $950
 $39
 $2,926
Total NDTF Investments$1,105
 $52
 $3,153
 $1,294
 $20
 $3,330
Other Investments 
  
  
  
  
  
 
  
  
  
  
  
Cash and cash equivalents$
 $
 $12
 $
 $
 $21
$
 $
 $17
 $
 $
 $12
Municipal bonds2
 
 47
 2
 
 44

 
 47
 2
 
 47
Total Other Investments$2
 $
 $59
 $2
 $
 $65
$
 $
 $64
 $2
 $
 $59
Total Investments$1,296
 $20
 $3,389
 $952
 $39
 $2,991
$1,105
 $52
 $3,217
 $1,296
 $20
 $3,389
The table below summarizes the maturity date for debt securities.
(in millions)December 31, 2017
December 31, 2018
Due in one year or less$94
$87
Due after one through five years301
306
Due after five through 10 years203
216
Due after 10 years474
541
Total$1,072
$1,150



FINANCIAL STATEMENTSINVESTMENTS IN DEBT AND EQUITY SECURITIES


Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the year ended December 31, 2018, and from sales of AFS securities for the years ended December 31, 2017, and 2016, were as follows.
Years Ended December 31,Year Ended December 31,
(in millions)2017
 2016
 2015
2018
FV-NI: 
Realized gains$65
 $84
 $33
$79
Realized losses56
 64
 13
53
AFS: 
Realized gains3
Realized losses15
204

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Years Ended December 31,
(in millions)2017
 2016
Realized gains$65
 $84
Realized losses56
 64
DUKE ENERGY PROGRESS
The following table presents the estimated fair value of investments in AFS securities.debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
Gross
 Gross
   Gross
 Gross
  Gross
 Gross
   Gross
 Gross
  
Unrealized
 Unrealized
   Unrealized
 Unrealized
  Unrealized
 Unrealized
   Unrealized
 Unrealized
  
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 
Losses(a)

 Fair Value
Gains
 Losses
 Fair Value
 Gains
 Losses
 Fair Value
NDTF                      
Cash and cash equivalents$
 $
 $50
 $
 $
 $45
$
 $
 $46
 $
 $
 $50
Equity securities980
 12
 1,795
 704
 21
 1,505
833
 30
 1,588
 980
 12
 1,795
Corporate debt securities6
 

 149
 4
 1
 120
2
 3
 171
 6
 
 149
Municipal bonds4
 2
 283
 2
 8
 263
1
 3
 271
 4
 2
 283
U.S. government bonds5
 2
 310
 5
 2
 275
6
 3
 415
 5
 2
 310
Other debt securities
 
 4
 
 
 5

 
 3
 
 
 4
Total NDTF$995
 $16
 $2,591
 $715
 $32
 $2,213
Total NDTF Investments$842
 $39
 $2,494
 $995
 $16
 $2,591
Other Investments 
  
  
  
   
  
 
  
  
  
   
  
Cash and cash equivalents$
 $
 $1
 $
 $
 $1
$
 $
 $6
 $
 $
 $1
Total Other Investments$
 $
 $1
 $
 $
 $1
$
 $
 $6
 $
 $
 $1
Total Investments$995
 $16
 $2,592
 $715
 $32
 $2,214
$842
 $39
 $2,500
 $995
 $16
 $2,592
The table below summarizes the maturity date for debt securities.
(in millions)December 31, 2017
December 31, 2018
Due in one year or less$21
$49
Due after one through five years219
231
Due after five through 10 years146
161
Due after 10 years360
419
Total$746
$860



FINANCIAL STATEMENTSINVESTMENTS IN DEBT AND EQUITY SECURITIES


Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the year ended December 31, 2018, and from sales of AFS securities for the years ended December 31, 2017, and 2016, were as follows.
Years Ended December 31,Year Ended December 31,
(in millions)2017
 2016
 2015
2018
FV-NI: 
Realized gains$54
 $71
 $26
$68
Realized losses48
 55
 11
48
AFS: 
Realized gains$2
Realized losses10
205

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Years Ended December 31,
(in millions)2017
 2016
Realized gains$54
 $71
Realized losses48
 55
DUKE ENERGY FLORIDA
The following table presents the estimated fair value of investments in AFS securities.debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
Gross
 Gross
   Gross
 Gross
  Gross
 Gross
   Gross
 Gross
  
Unrealized
 Unrealized
   Unrealized
 Unrealized
  Unrealized
 Unrealized
   Unrealized
 Unrealized
  
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 
Losses(a)

 Fair Value
Gains
 Losses
 Fair Value
 Gains
 Losses
 Fair Value
NDTF                        
Cash and cash equivalents$
 $
 $33
 $
 $
 $48
$
 $
 $13
 $
 $
 $33
Equity securities294
 3
 427
 231
 5
 356
260
 11
 403
 294
 3
 427
Corporate debt securities2
 
 62
 1
 1
 54

 1
 54
 2
 
 62
Municipal bonds
 
 1
 
 
 1

 
 1
 
 
 1
U.S. government bonds3
 1
 214
 3
 1
 251
3
 1
 186
 3
 1
 214
Other debt securities
 
 2
 
 
 3

 
 2
 
 
 2
Total NDTF(a)
$299
 $4
 $739
 $235
 $7
 $713
Total NDTF Investments(a)
$263
 $13
 $659
 $299
 $4
 $739
Other Investments 
  
  
  
  
  
 
  
  
  
  
  
Cash and cash equivalents$
 $
 $1
 $
 $
 $4
$
 $
 $1
 $
 $
 $1
Municipal bonds2
 
 47
 2
 
 44

 
 47
 2
 
 47
Total Other Investments$2
 $
 $48
 $2
 $
 $48
$
 $
 $48
 $2
 $
 $48
Total Investments$301
 $4
 $787
 $237
 $7
 $761
$263
 $13
 $707
 $301
 $4
 $787
(a)During the year ended December 31, 2017,2018, Duke Energy Florida continued to receive reimbursements from the NDTF for costs related to ongoing decommissioning activity of the Crystal River Unit 3 nuclear plant.
The table below summarizes the maturity date for debt securities.
(in millions)December 31, 2017
December 31, 2018
Due in one year or less$73
$38
Due after one through five years82
75
Due after five through 10 years57
55
Due after 10 years114
122
Total$326
$290



FINANCIAL STATEMENTSINVESTMENTS IN DEBT AND EQUITY SECURITIES


Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the year ended December 31, 2018, and from sales of AFS securities for the years ended December 31, 2017, and 2016, were as follows.
Years Ended December 31,Year Ended December 31,
(in millions)2017
 2016
 2015
2018
FV-NI: 
Realized gains$11
 $13
 $7
$11
Realized losses8
 9
 2
5
AFS: 
Realized gains1
Realized losses5
 Years Ended December 31,
(in millions)2017
 2016
Realized gains$11
 $13
Realized losses8
 9
DUKE ENERGY INDIANA
The following table presents the estimated fair value of investments in AFS securities.debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS.
 December 31, 2017 December 31, 2016
 Gross
 Gross
   Gross
 Gross
  
 Unrealized
 Unrealized
   Unrealized
 Unrealized
  
 Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 
Losses(a)

 Fair Value
Other Investments           
Equity securities$49
 $
 $97
 $33
 $
 $79
Corporate debt securities
 
 3
 
 
 2
Municipal bonds
 1
 28
 
 1
 28
U.S. government bonds
 
 
 
 
 1
Total Other Investments$49
 $1
 $128
 $33
 $1
 $110
Total Investments$49
 $1
 $128
 $33
 $1
 $110

206

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 December 31, 2018 December 31, 2017
 Gross
 Gross
   Gross
 Gross
  
 Unrealized
 Unrealized
   Unrealized
 Unrealized
  
 Holding
 Holding
 Estimated
 Holding
 Holding
 Estimated
(in millions)Gains
 Losses
 Fair Value
 Gains
 Losses
 Fair Value
Investments           
Equity securities$29
 $
 $67
 $49
 $
 $97
Corporate debt securities
 
 8
 
 
 3
Municipal bonds
 1
 33
 
 1
 28
Total Investments$29
 $1
 $108
 $49
 $1
 $128
The table below summarizes the maturity date for debt securities.
(in millions)December 31, 2017
December 31, 2018
Due in one year or less$5
$3
Due after one through five years12
20
Due after five through 10 years7
4
Due after 10 years7
14
Total$31
$41
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities were insignificantfor the year ended December 31, 2018, and from sales of AFS securities for the years ended December 31, 2017, and 2016, and 2015.were insignificant.
16. FAIR VALUE MEASUREMENTS
Fair value is the exchange price to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. The fair value definition focuses on an exit price versus the acquisition cost. Fair value measurements use market data or assumptions market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs may be readily observable, corroborated by market data, or generally unobservable. Valuation techniques maximize the use of observable inputs and minimize use of unobservable inputs. A midmarket pricing convention (the midpoint price between bid and ask prices) is permitted for use as a practical expedient.
Fair value measurements are classified in three levels based on the fair value hierarchy:
Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date. An active market is one in which transactions for an asset or liability occur with sufficient frequency and volume to provide ongoing pricing information.
Level 2 – A fair value measurement utilizing inputs other than quoted prices included in Level 1 that are observable, either directly or indirectly, for an asset or liability. Inputs include (i) quoted prices for similar assets or liabilities in active markets, (ii) quoted prices for identical or similar assets or liabilities in markets that are not active, and (iii) inputs other than quoted market prices that are observable for the asset or liability, suchhierarchy as interest rate curves and yield curves observable at commonly quoted intervals, volatilities and credit spreads. A Level 2 measurement cannot have more than an insignificant portion of its valuation based on unobservable inputs. Instruments in this category include non-exchange-traded derivatives, such as over-the-counter forwards, swaps and options; certain marketable debt securities; and financial instruments traded in less than active markets.
Level 3 – Any fair value measurement which includes unobservable inputs for more than an insignificant portion of the valuation. These inputs may be used with internally developed methodologies that result in management’s best estimate of fair value. Level 3 measurements may include longer-term instruments that extend into periods in which observable inputs are not available.
Not Categorizeddefined by GAAP. Certain investments are not categorized within the Fair Valuefair value hierarchy. These investments are measured at fair value using the NAV per share practical expedient. The NAV is derived based on the fair valueinvestment cost, less any impairment, plus or minus changes resulting from observable price changes for an identical or similar investment of the underlying investments but may not be readily redeemable at that fair value.same issuer.



FINANCIAL STATEMENTSFAIR VALUE MEASUREMENTS


Fair value accounting guidance permits entities to elect to measure certain financial instruments that are not required to be accounted for at fair value, such as equity method investments or the company’s own debt, at fair value. The Duke Energy Registrants have not elected to record any of these items at fair value.
Transfers between levels represent assets or liabilities that were previously (i) categorized at a higher level for which the inputs to the estimate became less observable or (ii) classified at a lower level for which the inputs became more observable during the period. The Duke Energy Registrant’s policy is to recognize transfers between levels of the fair value hierarchy at the end of the period. There were no transfers between levels during the years ended December 31, 2018, 2017 2016 and 2015.2016. In addition, for Piedmont, there were no transfers between levels during the two months ended December 31, 2016, and the yearsyear ended October 31, 2016, and 2015.2016.
Valuation methods of the primary fair value measurements disclosed below are as follows.
Investments in equity securities
The majority of investments in equity securities are valued using Level 1 measurements. Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the quarter. Principal active markets for equity prices include published exchanges such as the New York Stock Exchange (NYSE)NYSE and the NASDAQNasdaq Stock Market. Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. There was no after-hours market activity that was required to be reflected in the reported fair value measurements.
Investments in debt securities
Most investments in debt securities are valued using Level 2 measurements because the valuations use interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. If the market for a particular fixed-income security is relatively inactive or illiquid, the measurement is Level 3.

207

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Commodity derivatives
Commodity derivatives with clearinghouses are classified as Level 1. Other commodity derivatives, including Piedmont's natural gas supply contracts, are primarily valued using internally developed discounted cash flow models that incorporate forward price, adjustments for liquidity (bid-ask spread) and credit or non-performance risk (after reflecting credit enhancements such as collateral), and are discounted to present value. Pricing inputs are derived from published exchange transaction prices and other observable data sources. In the absence of an active market, the last available price may be used. If forward price curves are not observable for the full term of the contract and the unobservable period had more than an insignificant impact on the valuation, the commodity derivative is classified as Level 3. In isolation, increases (decreases) in natural gas forward prices result in favorable (unfavorable) fair value adjustments for natural gas purchase contracts; and increases (decreases) in electricity forward prices result in unfavorable (favorable) fair value adjustments for electricity sales contracts. Duke Energy regularly evaluates and validates pricing inputs used to estimate the fair value of natural gas commodity contracts by a market participant price verification procedure. This procedure provides a comparison of internal forward commodity curves to market participant generated curves.
Interest rate derivatives
Most over-the-counter interest rate contract derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward interest rate curves, notional amounts, interest rates and credit quality of the counterparties.
Other fair value considerations
See Note 11 for a discussion of the valuation of goodwill and intangible assets. See Note 2 related to the acquisition of Piedmont in 2016 and the purchase of NCEMPA's ownership interests in certain generating assets in 2015.
DUKE ENERGY
The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets. Derivative amounts in the tabletables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 14. See Note 15 for additional information related to investments by major security type for the Duke Energy Registrants.
December 31, 2017December 31, 2018
(in millions)Total Fair Value
Level 1
Level 2
Level 3
Not Categorized
Total Fair Value
Level 1
Level 2
Level 3
Not Categorized
NDTF equity securities$4,914
$4,840
$
$
$74
$4,475
$4,410
$
$
$65
NDTF debt securities2,174
635
1,539


2,231
576
1,655


Other AFS equity securities123
123



Other trading and AFS debt securities241
57
184


Other equity securities99
99



Other debt securities270
67
203


Derivative assets51
3
20
28

57
4
25
28

Total assets7,503
5,658
1,743
28
74
7,132
5,156
1,883
28
65
Derivative liabilities(230)(2)(86)(142)
(242)(11)(90)(141)
Net assets (liabilities)$7,273
$5,656
$1,657
$(114)$74
$6,890
$5,145
$1,793
$(113)$65



 December 31, 2016
(in millions)Total Fair Value
Level 1
Level 2
Level 3
Not Categorized
NDTF equity securities$4,106
$4,029
$
$
$77
NDTF debt securities2,078
632
1,446


Other trading and AFS equity securities104
104



Other trading and AFS debt securities266
75
186
5

Derivative assets162
5
136
21

Total assets6,716
4,845
1,768
26
77
Derivative liabilities(252)(2)(63)(187)
Net assets$6,464
$4,843
$1,705
$(161)$77
FINANCIAL STATEMENTSFAIR VALUE MEASUREMENTS


208

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 December 31, 2017
(in millions)Total Fair Value
Level 1
Level 2
Level 3
Not Categorized
NDTF equity securities$4,914
$4,840
$
$
$74
NDTF debt securities2,174
635
1,539


Other equity securities123
123



Other debt securities241
57
184


Derivative assets51
3
20
28

Total assets7,503
5,658
1,743
28
74
Derivative liabilities(230)(2)(86)(142)
Net assets (liabilities)$7,273
$5,656
$1,657
$(114)$74
The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Amounts included in earnings for derivatives are primarily included in Cost of natural gas on the Duke Energy Registrants' Consolidated Statements of Operations and Comprehensive Income. Amounts included in changes of net assets on the Duke Energy Registrants' Consolidated Balance Sheets are included in regulatory assets or liabilities. All derivative assets and liabilities are presented on a net basis.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
                  
(in millions)Investments
 Derivatives (net)
 Total
 Investments
 Derivatives (net)
 Total
Derivatives (net)
 Investments
 Derivatives (net)
 Total
Balance at beginning of period$5
 $(166) $(161) $5
 $10
 $15
$(114) $5
 $(166) $(161)
Total pretax realized or unrealized gains included in comprehensive income1
 
 1
 
 
 

 1
 
 1
Derivative liability resulting from the acquisition of Piedmont
 
 
 
 (187) (187)
Purchases, sales, issuances and settlements:    

             
Purchases
 55
 55
 
 33
 33
57
 
 55
 55
Sales(6) 
 (6) 
 
 

 (6) 
 (6)
Settlements
 (47) (47) 
 (28) (28)(57) 
 (47) (47)
Total gains included on the Consolidated Balance Sheet
 44
 44
 
 6
 6
1
 
 44
 44
Balance at end of period$

$(114) $(114) $5
 $(166) $(161)$(113) $
 $(114) $(114)
DUKE ENERGY CAROLINAS
The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
December 31, 2017December 31, 2018
(in millions)Total Fair Value
Level 1
Level 2
Level 3
Not Categorized
Total Fair Value
Level 1
Level 2
Not Categorized
NDTF equity securities$2,692
$2,618
$
$
$74
$2,484
$2,419
$
$65
NDTF debt securities1,066
204
862


1,069
149
920

Derivative assets2

2


3

3

Total assets3,760
2,822
864

74
3,556
2,568
923
65
Derivative liabilities(35)(1)(34)

(33)
(33)
Net assets$3,725
$2,821
$830
$
$74
$3,523
$2,568
$890
$65
December 31, 2016December 31, 2017
(in millions)Total Fair Value
Level 1
Level 2
Level 3
Not Categorized
Total Fair Value
Level 1
Level 2
Not Categorized
NDTF equity securities$2,245
$2,168
$
$
$77
$2,692
$2,618
$
$74
NDTF debt securities1,013
178
835


1,066
204
862

Other AFS debt securities3


3

Derivative assets33

33


2

2

Total assets3,294
2,346
868
3
77
3,760
2,822
864
74
Derivative liabilities(16)
(16)

(35)(1)(34)
Net assets$3,278
$2,346
$852
$3
$77
$3,725
$2,821
$830
$74



209

PART II
FINANCIAL STATEMENTSFAIR VALUE MEASUREMENTS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
InvestmentsInvestments
Years Ended December 31,Year Ended December 31,
(in millions)2017
 2016
2017
Balance at beginning of period$3
 $3
$3
Total pretax realized or unrealized gains included in comprehensive income1
 
1
Purchases, sales, issuances and settlements:    
Sales(4) 
(4)
Balance at end of period$

$3
$
PROGRESS ENERGY
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
(in millions)Total Fair Value
Level 1
Level 2
 Total Fair Value
Level 1
Level 2
Total Fair Value
Level 1
Level 2
 Total Fair Value
Level 1
Level 2
NDTF equity securities$2,222
$2,222
$
 $1,861
$1,861
$
$1,991
$1,991
$
 $2,222
$2,222
$
NDTF debt securities1,108
431
677
 1,065
454
611
1,162
427
735
 1,108
431
677
Other AFS debt securities59
12
47
 65
21
44
Other debt securities64
17
47
 59
12
47
Derivative assets3
1
2
 85

85
4

4
 3
1
2
Total assets3,392
2,666
726
 3,076
2,336
740
3,221
2,435
786
 3,392
2,666
726
Derivative liabilities(36)(1)(35) (25)
(25)(44)
(44) (36)(1)(35)
Net assets$3,356
$2,665
$691
 $3,051
$2,336
$715
$3,177
$2,435
$742
 $3,356
$2,665
$691
DUKE ENERGY PROGRESS
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
(in millions)Total Fair Value
Level 1
Level 2
 Total Fair Value
Level 1
Level 2
Total Fair Value
Level 1
Level 2
 Total Fair Value
Level 1
Level 2
NDTF equity securities$1,795
$1,795
$
 $1,505
$1,505
$
$1,588
$1,588
$
 $1,795
$1,795
$
NDTF debt securities796
243
553
 708
207
501
906
294
612
 796
243
553
Other AFS debt securities1
1

 1
1

Other debt securities6
6

 1
1

Derivative assets2
1
1
 46

46
4

4
 2
1
1
Total assets2,594
2,040
554
 2,260
1,713
547
2,504
1,888
616
 2,594
2,040
554
Derivative liabilities(18)(1)(17) (7)
(7)(27)
(27) (18)(1)(17)
Net assets$2,576
$2,039
$537
 $2,253
$1,713
$540
$2,477
$1,888
$589
 $2,576
$2,039
$537
DUKE ENERGY FLORIDA
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
(in millions)Total Fair Value
Level 1
Level 2
 Total Fair Value
Level 1
Level 2
Total Fair Value
Level 1
Level 2
 Total Fair Value
Level 1
Level 2
NDTF equity securities$427
$427
$
 $356
$356
$
$403
$403
$
 $427
$427
$
NDTF debt securities312
188
124
 357
247
110
256
133
123
 312
188
124
Other AFS debt securities48
1
47
 48
4
44
Other debt securities48
1
47
 48
1
47
Derivative assets1

1
 39

39



 1

1
Total assets788
616
172
 800
607
193
707
537
170
 788
616
172
Derivative liabilities(12)
(12) (12)
(12)(9)
(9) (12)
(12)
Net assets$776
$616
$160
 $788
$607
$181
$698
$537
$161
 $776
$616
$160



210

PART II
FINANCIAL STATEMENTSFAIR VALUE MEASUREMENTS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

DUKE ENERGY OHIO
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
(in millions)Total Fair Value
Level 2
Level 3
 Total Fair Value
Level 2
Level 3
Total Fair Value
Level 2
Level 3
 Total Fair Value
Level 2
Level 3
Derivative assets$1
$
$1
 $5
$
$5
$6
$
$6
 $1
$
$1
Derivative liabilities(5)(5)
 (6)(6)
(5)(5)
 (5)(5)
Net (liabilities) assets$(4)$(5)$1
 $(1)$(6)$5
Net assets (liabilities)$1
$(5)$6
 $(4)$(5)$1
The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)Derivatives (net)
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
2018
 2017
Balance at beginning of period$5
 $3
$1
 $5
Purchases, sales, issuances and settlements:      
Purchases3
 5
7
 3
Settlements(4) (5)(4) (4)
Total gains included on the Consolidated Balance Sheet(3) 2
2
 (3)
Balance at end of period$1
 $5
$6
 $1
DUKE ENERGY INDIANA
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
��December 31, 2017 December 31, 2016
(in millions)Total Fair Value
Level 1
Level 2
Level 3
 Total Fair Value
Level 1
Level 2
Level 3
Other AFS equity securities$97
$97
$
$
 $79
$79
$
$
Other AFS debt securities31

31

 31

31

Derivative assets27


27
 16


16
Total assets155
97
31
27
 126
79
31
16
Derivative liabilities



 (2)(2)

Net assets$155
$97
$31
$27
 $124
$77
$31
$16
 December 31, 2018 December 31, 2017
(in millions)Total Fair Value
Level 1
Level 2
Level 3
 Total Fair Value
Level 1
Level 2
Level 3
Other equity securities$67
$67
$
$
 $97
$97
$
$
Other debt securities41

41

 31

31

Derivative assets23
1

22
 27


27
Total assets$131
$68
$41
$22
 $155
$97
$31
$27
The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)Derivatives (net)
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
2018
 2017
Balance at beginning of period$16
 $7
$27
 $16
Purchases, sales, issuances and settlements:      
Purchases52
 29
50
 52
Settlements(43) (24)(53) (43)
Total gains included on the Consolidated Balance Sheet2
 4
Total (losses) gains included on the Consolidated Balance Sheet(2) 2
Balance at end of period$27
 $16
$22
 $27



211

PART II
FINANCIAL STATEMENTSFAIR VALUE MEASUREMENTS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

PIEDMONT
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Consolidated Balance Sheets.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
(in millions)Total Fair Value
Level 1
Level 3
 Total Fair Value
Level 1
Level 3
Total Fair Value
Level 1
Level 3
 Total Fair Value
Level 1
Level 3
Other trading equity securities$
$
$
 $4
$4
$
Other trading debt securities1
1

 1
1

Other debt securities$
$
$
 $1
$1
$
Derivative assets2
2

 3
3

3
3

 2
2

Total assets3
3

 8
8

3
3

 3
3

Derivative liabilities(142)
(142) (187)
(187)(141)
(141) (142)
(142)
Net assets$(139)$3
$(142) $(179)$8
$(187)
Net (liabilities) assets$(138)$3
$(141) $(139)$3
$(142)
The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)Derivatives (net)
Year Ended Two Months Ended Year EndedYears Ended December 31,
(in millions)December 31, 2017
 December 31, 2016
 October 31, 2016
2018
 2017
Balance at beginning of period$(187) $(188) $
$(142) $(187)
Total gains (losses) and settlements45
 1
 (188)
Total gains and settlements1
 45
Balance at end of period$(142) $(187) $(188)$(141) $(142)
QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS
The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3.
December 31, 2017December 31, 2018
Fair Value    Fair Value    
Investment Type(in millions)Valuation TechniqueUnobservable InputRange(in millions)Valuation TechniqueUnobservable InputRange
Duke Energy Ohio          
FTRs$1
RTO auction pricingFTR price – per MWh$0.07
$1.41
$6
RTO auction pricingFTR price – per MWh$1.19
$4.59
Duke Energy Indiana          
FTRs27
RTO auction pricingFTR price – per MWh(0.77)7.44
22
RTO auction pricingFTR price – per MWh(2.07)8.27
Piedmont          
Natural gas contracts(142)Discounted cash flowForward natural gas curves - price per MMBtu2.10
2.88
(141)Discounted cash flowForward natural gas curves — price per MMBtu1.87
2.95
Duke Energy          
Total Level 3 derivatives$(114)    $(113)    
December 31, 2016December 31, 2017
Fair Value    Fair Value    
Investment Type(in millions)Valuation TechniqueUnobservable InputRange(in millions)Valuation TechniqueUnobservable InputRange
Duke Energy Ohio          
FTRs$5
RTO auction pricingFTR price – per MWh0.77
3.52
$1
RTO auction pricingFTR price – per MWh$0.07
$1.41
Duke Energy Indiana          
FTRs16
RTO auction pricingFTR price – per MWh(0.83)9.32
27
RTO auction pricingFTR price – per MWh(0.77)7.44
Piedmont          
Natural gas contracts(187)Discounted cash flowForward natural gas curves - price per MMBtu2.31
4.18
(142)Discounted cash flowForward natural gas curves — price per MMBtu2.10
2.88
Duke Energy          
Total Level 3 derivatives$(166)    $(114)    



212

PART II
FINANCIAL STATEMENTSFAIR VALUE MEASUREMENTS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

OTHER FAIR VALUE DISCLOSURES
The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements.
December 31, 2017 December 31, 2016December 31, 2018 December 31, 2017
(in millions)Book Value
 Fair Value
 Book Value
 Fair Value
Book Value
 Fair Value
 Book Value
 Fair Value
Duke Energy(a)$52,279
 $55,331
 $47,895
 $49,161
$54,529
 $54,534
 $52,279
 $55,331
Duke Energy Carolinas10,103
 11,372
 9,603
 10,494
10,939
 11,471
 10,103
 11,372
Progress Energy17,837
 20,000
 17,541
 19,107
18,911
 19,885
 17,837
 20,000
Duke Energy Progress7,357
 7,992
 7,011
 7,357
8,204
 8,300
 7,357
 7,992
Duke Energy Florida7,095
 7,953
 6,125
 6,728
7,321
 7,742
 7,095
 7,953
Duke Energy Ohio2,067
 2,249
 1,884
 2,020
2,165
 2,239
 2,067
 2,249
Duke Energy Indiana3,783
 4,464
 3,786
 4,260
3,782
 4,158
 3,783
 4,464
Piedmont2,037
 2,209
 1,821
 1,933
2,138
 2,180
 2,037
 2,209
(a)Book value of long-term debt includes $1.6 billion as of December 31, 2018, and $1.7 billion as of December 31, 2017, of unamortized debt discount and premium, net in purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt.
At both December 31, 2017,2018, and December 31, 2016,2017, fair value of cash and cash equivalents, accounts and notes receivable, accounts payable, notes payable and commercial paper, and nonrecourse notes payable of VIEs are not materially different from their carrying amounts because of the short-term nature of these instruments and/or because the stated rates approximate market rates.
17. VARIABLE INTEREST ENTITIES
A VIE is an entity that is evaluated for consolidation using more than a simple analysis of voting control. The analysis to determine whether an entity is a VIE considers contracts with an entity, credit support for an entity, the adequacy of the equity investment of an entity and the relationship of voting power to the amount of equity invested in an entity. This analysis is performed either upon the creation of a legal entity or upon the occurrence of an event requiring reevaluation, such as a significant change in an entity’s assets or activities. A qualitative analysis of control determines the party that consolidates a VIE. This assessment is based on (i) what party has the power to direct the activities of the VIE that most significantly impact its economic performance and (ii) what party has rights to receive benefits or is obligated to absorb losses that could potentially be significant to the VIE. The analysis of the party that consolidates a VIE is a continual reassessment.
CONSOLIDATED VIEs
The obligations of these VIEs discussed in the following paragraphs are nonrecourse to the Duke Energy Registrants. The registrants have no requirement to provide liquidity to, purchase assets of or guarantee performance of these VIEs unless noted in the following paragraphs.
No financial support was provided to any of the consolidated VIEs during the years ended December 31, 2018, 2017 2016 and 2015,2016, or is expected to be provided in the future, that was not previously contractually required.
Receivables Financing – DERF/DEPR/DEFR
Duke Energy Receivables Finance Company, LLC (DERF), Duke Energy Progress Receivables, LLC (DEPR)DERF, DEPR and Duke Energy Florida Receivables, LLC (DEFR)DEFR are bankruptcy remote, special purpose subsidiaries of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively. DERF, DEPR and DEFR are wholly owned limited liability companies with separate legal existence from their parent companies and their assets are not generally available to creditors of their parent companies. On a revolving basis, DERF, DEPR and DEFR buy certain accounts receivable arising from the sale of electricity and related services from their parent companies.
DERF, DEPR and DEFR borrow amounts under credit facilities to buy these receivables. Borrowing availability from the credit facilities is limited to the amount of qualified receivables purchased. The sole source of funds to satisfy the related debt obligations is cash collections from the receivables. Amounts borrowed under the credit facilities are reflected on the Consolidated Balance Sheets as Long-Term Debt.
The most significant activity that impacts the economic performance of DERF, DEPR and DEFR are the decisions made to manage delinquent receivables. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are considered the primary beneficiaries and consolidate DERF, DEPR and DEFR, respectively, as they make those decisions.
Receivables Financing – CRC
CRC is a bankruptcy remote, special purpose entity indirectly owned by Duke Energy. On a revolving basis, CRC buys certain accounts receivable arising from the sale of electricity, natural gas and related services from Duke Energy Ohio and Duke Energy Indiana. CRC borrows amounts under a credit facility to buy the receivables from Duke Energy Ohio and Duke Energy Indiana. Borrowing availability from the credit facility is limited to the amount of qualified receivables sold to CRC. The sole source of funds to satisfy the related debt obligation is cash collections from the receivables. Amounts borrowed under the credit facility are reflected on Duke Energy's Consolidated Balance Sheets as Long-Term Debt.
The proceeds Duke Energy Ohio and Duke Energy Indiana receive from the sale of receivables to CRC are typicallyapproximately 75 percent cash and 25 percent in the form of a subordinated note from CRC. The subordinated note is a retained interest in the receivables sold. Depending on collection experience, additional equity infusions to CRC may be required by Duke Energy to maintain a minimum equity balance of $3 million.



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PART II
FINANCIAL STATEMENTSVARIABLE INTEREST ENTITIES
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

CRC is considered a VIE because (i) equity capitalization is insufficient to support its operations, (ii) power to direct the activities that most significantly impact the economic performance of the entity are not performed by the equity holder and (iii) deficiencies in net worth of CRC are funded by Duke Energy. The most significant activities that impact the economic performance of CRC are decisions made to manage delinquent receivables. Duke Energy is considered the primary beneficiary and consolidates CRC as it makes these decisions. Neither Duke Energy Ohio nor Duke Energy Indiana consolidate CRC.
Receivables Financing – Credit Facilities
The following table outlines amounts and expiration dates of the credit facilities described above.
Duke EnergyDuke Energy
  Duke Energy
 Duke Energy
 Duke Energy
  Duke Energy
 Duke Energy
 Duke Energy
  Carolinas
 Progress
 Florida
  Carolinas
 Progress
 Florida
CRC
 DERF
 DEPR
 DEFR
CRC
 DERF
 DEPR
 DEFR
Expiration dateDecember 2020
 December 2020
 February 2019
 April 2019
December 2020
 December 2020
 February 2021
 April 2021
Credit facility amount (in millions)$325
 $450
 $300
 $225
$325
 $450
 $300
 $225
Amounts borrowed at December 31, 2018325
 450
 300
 225
Amounts borrowed at December 31, 2017325
 450
 300
 225
325
 450
 300
 225
Amounts borrowed at December 31, 2016325
 425
 300
 225
Restricted Receivables at December 31, 2018564
 699
 547
 357
Restricted Receivables at December 31, 2017545
 640
 459
 317
Nuclear Asset-Recovery Bonds – DEFPF
Duke Energy Florida Project Finance, LLC (DEFPF)DEFPF is a bankruptcy remote, wholly owned special purpose subsidiary of Duke Energy Florida. DEFPF was formed in 2016 for the sole purpose of issuing nuclear asset-recovery bonds to finance Duke Energy Florida's unrecovered regulatory asset related to Crystal River Unit 3.
In June 2016, DEFPF issued $1,294 million of senior secured bonds and used the proceeds to acquire nuclear asset-recovery property from Duke Energy Florida. The nuclear asset-recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable nuclear asset-recovery charge from all Duke Energy Florida retail customers until the bonds are paid in full and all financing costs have been recovered. The nuclear asset-recovery bonds are secured by the nuclear asset-recovery property and cash collections from the nuclear asset-recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Florida. For additional information see Notes 4 and 6.
DEFPF is considered a VIE primarily because the equity capitalization is insufficient to support its operations. Duke Energy Florida has the power to direct the significant activities of the VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates DEFPF.
The following table summarizes the impact of DEFPF on Duke Energy Florida's Consolidated Balance Sheets.
(in millions)December 31, 2017
December 31, 2016
December 31, 2018
December 31, 2017
Receivables of VIEs$4
$6
$5
$4
Regulatory Assets: Current51
50
52
51
Current Assets: Other40
53
39
40
Other Noncurrent Assets: Regulatory assets1,091
1,142
1,041
1,091
Current Liabilities: Other10
17
10
10
Current maturities of long-term debt53
62
53
53
Long-Term Debt1,164
1,217
1,111
1,164
Commercial Renewables
Certain of Duke Energy’s renewable energy facilities are VIEs due to Duke Energy issuing guarantees for debt service and operations and maintenance reserves in support of debt financings. Assets are restricted and cannot be pledged as collateral or sold to third parties without prior approval of debt holders. Additionally, Duke Energy has VIEs associated with tax equity arrangements entered into with third–party investors in order to finance the cost of solar energy systems eligible for tax credits. The activities that most significantly impactimpacted the economic performance of these renewable energy facilities were decisions associated with siting, negotiating PPAs engineering, procurement and constructionEPC agreements, and decisions associated with ongoing operations and maintenance-related activities. Duke Energy is considered the primary beneficiary and consolidates the entities as it is responsible for all of these decisions.



FINANCIAL STATEMENTSVARIABLE INTEREST ENTITIES


The table below presents material balances reported on Duke Energy's Consolidated Balance Sheets related to renewables VIEs.
(in millions)December 31, 2017
December 31, 2016
December 31, 2018
December 31, 2017
Current Assets: Other$174
$223
$123
$174
Property, plant and equipment, cost3,923
3,419
4,007
3,923
Accumulated depreciation and amortization(591)(453)(698)(591)
Other Noncurrent Assets: Other261
50
Current maturities of long-term debt170
198
174
170
Long-Term Debt1,700
1,097
1,587
1,700
Other Noncurrent Liabilities: Deferred income taxes(148)275

(148)
Other Noncurrent Liabilities: Asset Retirement Obligations106
83
Other Noncurrent Liabilities: Other241
252
212
241

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PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

NON-CONSOLIDATED VIEs
The following tables summarize the impact of non-consolidated VIEs on the Consolidated Balance Sheets.
December 31, 2017December 31, 2018
Duke Energy Duke
 Duke
Duke Energy Duke
 Duke
Pipeline
 Commercial
 Other
   Energy
 Energy
Pipeline
 Commercial
 Other
   Energy
 Energy
(in millions)Investments
 Renewables
 
VIEs(a) 

 Total
 Ohio
 Indiana
Investments
 Renewables
 VIEs
 Total
 Ohio
 Indiana
Receivables from affiliated companies$
 $
 $
 $
 $87
 $106
$
 $
 $
 $
 $93
 $118
Investments in equity method unconsolidated affiliates697
 180
 42
 919
 
 
822
 190
 48
 1,060
 
 
Other noncurrent assets17
 
 
 17
 
 
Total assets$714
 $180
 $42
 $936
 $87
 $106
$822
 $190
 $48
 $1,060
 $93
 $118
Taxes accrued(29) 
 
 (29) 
 
(1) 
 
 (1) 
 
Other current liabilities
 
 4
 4
 
 

 
 4
 4
 
 
Deferred income taxes42
 
 
 42
 
 
21
 
 
 21
 
 
Other noncurrent liabilities
 
 12
 12
 
 

 
 12
 12
 
 
Total liabilities$13
 $
 $16
 $29
 $
 $
$20
 $
 $16
 $36
 $
 $
Net assets$701
 $180
 $26
 $907
 $87
 $106
$802
 $190
 $32
 $1,024
 $93
 $118
(a)Duke Energy holds a 50 percent equity interest in Duke-American Transmission Company, LLC (DATC). As of December 31, 2016, DATC was considered a VIE due to having insufficient equity to finance its own activities without subordinated financial support. However, DATC is no longer considered a VIE based on sufficient equity to finance its own activities, and, therefore, is no longer considered a VIE as of December 31, 2017. Duke Energy's investment in DATC was $46 million at December 31, 2017.
December 31, 2016  December 31, 2017
Duke Energy Duke
 Duke
  Duke Energy Duke
 Duke
Pipeline
 Commercial
     Energy
 Energy
  Pipeline
 Commercial
 Other
   Energy
 Energy
(in millions)Investments
 Renewables
 Other
 Total
 Ohio
 Indiana
 
Piedmont (a)

Investments
 Renewables
 VIEs
 Total
 Ohio
 Indiana
Receivables from affiliated companies$
 $
 $
 $
 $82
 $101
 $
$
 $
 $
 $
 $87
 $106
Investments in equity method unconsolidated affiliates487
 174
 90
 751
 
 
 139
697
 180
 42
 919
 
 
Other noncurrent assets12
 
 
 12
 
 
 
17
 
 
 17
 
 
Total assets$499
 $174
 $90
 $763
 $82
 $101
 $139
$714
 $180
 $42
 $936
 $87
 $106
Taxes accrued(29) 
 
 (29) 
 
Other current liabilities
 
 3
 3
 
 
 

 
 4
 4
 
 
Deferred income taxes42
 
 
 42
 
 
Other noncurrent liabilities
 
 13
 13
 
 
 4

 
 12
 12
 
 
Total liabilities$
 $
 $16
 $16
 $
 $
 $4
$13
 $
 $16
 $29
 $
 $
Net assets$499
 $174
 $74
 $747
 $82
 $101
 $135
$701
 $180
 $26
 $907
 $87
 $106
(a)In April 2017, Piedmont transferred its non-consolidated VIE investments to a wholly owned subsidiary of Duke Energy. See Note 12 and the "Pipeline Investments" section below for additional detail.
The Duke Energy Registrants are not aware of any situations where the maximum exposure to loss significantly exceeds the carrying values shown above except for the power purchase agreement with OVEC, which is discussed below, and various guarantees, someincluding Duke Energy's guarantee agreement to support its share of which are reflected in the table aboveACP revolving credit facility. Duke Energy's maximum exposure to loss under the terms of the guarantee is $677 million as Other noncurrent liabilities.of December 31, 2018. For more information on various guarantees, refer to Note 7.
Pipeline Investments
Duke Energy has investments in various joint ventures with pipeline projects currently under construction. These entities are considered VIEs due to having insufficient equity to finance their own activities without subordinated financial support. Duke Energy does not have the power to direct the activities that most significantly impact the economic performance, the obligation to absorb losses or the right to receive benefits of these VIEs and therefore does not consolidate these entities.



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FINANCIAL STATEMENTSVARIABLE INTEREST ENTITIES
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The table below presents Duke Energy's ownership interest and investment balance in in these joint ventures.
  Investment Amount (in millions)  Investment Amount (in millions)
Ownership December 31, December 31,Ownership December 31, December 31,
Entity NameInterest 2017 2016Interest 2018 2017
ACP47% $397
 $265
47% $797
 $397
Sabal Trail(a)7.5% 219
 140
7.5% 
 219
Constitution(b)24% 81
 82
24% 25
 81
Total  $697
 $487
  $822
 $697
(a)At December 31, 2017, Sabal Trail was considered a VIE due to having insufficient equity to finance their own activities without subordinated financial support. However, Sabal Trail is now a fully operational, well capitalized entity. As a result, Sabal Trail has sufficient equity to finance its own activities, and therefore, is no longer considered a VIE. Duke Energy's investment in Sabal Trail was $112 million at December 31, 2018.
(b)During the year ended December 31, 2018, Duke Energy recorded an OTTI of $55 million related to Constitution within Equity in earnings of unconsolidated affiliates on Duke Energy's Consolidated Statements of Income. See Note 4 for additional information.

Commercial Renewables
Duke Energy has investments in various renewable energy project entities. Some of these entities are VIEs due to Duke Energy issuing guarantees for debt service and operations and maintenance reserves in support of debt financings. Duke Energy does not consolidate these VIEs because power to direct and control key activities is shared jointly by Duke Energy and other owners.
Other VIEsPioneer
Duke Energy holds a 50 percent equity interest in Pioneer. Pioneer is considered a VIE due to having insufficient equity to finance their own activities without subordinated financial support. The activities that most significantly impact Pioneer's economic performance are decisions related to the development of new transmission facilities. The power to direct these activities is jointly and equally shared by Duke Energy and the other joint venture partner, American Electric Power,Power; therefore, Duke Energy does not consolidate Pioneer.
OVEC
Duke Energy Ohio’s 9 percent ownership interest in OVEC is considered a non-consolidated VIE due to having insufficient equity to finance theirits activities without subordinated financial support. The activities that most significantly impact OVEC's economic performance include fuel strategy and supply activities and decisions associated with ongoing operations and maintenance-related activities. Duke Energy Ohio does not have the unilateral power to direct these activities, and therefore, does not consolidate OVEC.
As a counterparty to an inter-company power agreement (ICPA),ICPA, Duke Energy Ohio has a contractual arrangement to buy powerreceive entitlements to capacity and energy from OVEC’s power plants through June 2040 commensurate with its power participation ratio, which is equivalent to Duke Energy Ohio's ownership interest. Costs, including fuel, operating expenses, fixed costs, debt amortization, and interest expense, are allocated to counterparties to the ICPA based on their power participation ratio. The value of the ICPA is subject to variability due to fluctuation in power prices and changes in OVEC's cost of business, includingbusiness. On March 31, 2018, FES, a subsidiary of FirstEnergy and an ICPA counterparty with a power participation ratio of 4.85 percent, filed for Chapter 11 bankruptcy, which could increase costs associated with its 2,256 MW of coal-fired generation capacity. Deteriorationallocated to the counterparties. On July 31, 2018, the bankruptcy court rejected the FES ICPA, which means OVEC is an unsecured creditor in the credit quality, orFES bankruptcy proceeding. Duke Energy Ohio cannot predict the impact of one or more parties to the ICPA could increase the costs of OVEC.bankruptcy filing on its OVEC interests. In addition, certain proposed environmental rulemaking could result in future increased OVEC cost allocations. See Note 4 for additional information.
CRC
See discussion under Consolidated VIEs for additional information related to CRC.
Amounts included in Receivables from affiliated companies in the above table for Duke Energy Ohio and Duke Energy Indiana reflect their retained interest in receivables sold to CRC. These subordinated notes held by Duke Energy Ohio and Duke Energy Indiana are stated at fair value. Carrying values of retained interests are determined by allocating carrying value of the receivables between assets sold and interests retained based on relative fair value. The allocated bases of the subordinated notes are not materially different than their face value because (i) the receivables generally turnover in less than two months, (ii) credit losses are reasonably predictable due to the broad customer base and lack of significant concentration and (iii) the equity in CRC is subordinate to all retained interests and thus would absorb losses first. The hypothetical effect on fair value of the retained interests assuming both a 10 percent and a 20 percent unfavorable variation in credit losses or discount rates is not material due to the short turnover of receivables and historically low credit loss history. Interest accrues to Duke Energy Ohio and Duke Energy Indiana on the retained interests using the acceptable yield method. This method generally approximates the stated rate on the notes since the allocated basis and the face value are nearly equivalent. An impairment charge is recorded against the carrying value of both retained interests and purchased beneficial interest whenever it is determined that an OTTI has occurred.



FINANCIAL STATEMENTSVARIABLE INTEREST ENTITIES


Key assumptions used in estimating fair value are detailed in the following table.
Duke Energy Ohio Duke Energy IndianaDuke Energy Ohio Duke Energy Indiana
2017
 2016
 2017
 2016
2018
 2017
 2018
 2017
Anticipated credit loss ratio0.5% 0.5% 0.3% 0.3%0.5% 0.5% 0.3% 0.3%
Discount rate2.1% 1.5% 2.1% 1.5%3.0% 2.1% 3.0% 2.1%
Receivable turnover rate13.5% 13.3% 10.7% 10.6%13.5% 13.5% 11.0% 10.7%
The following table shows the gross and net receivables sold.
 Duke Energy Ohio Duke Energy Indiana
(in millions)2017
 2016
 2017
 2016
Receivables sold$273
 $267
 $312
 $306
Less: Retained interests87
 82
 106
 101
Net receivables sold$186
 $185
 $206
 $205

216

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Duke Energy Ohio Duke Energy Indiana
(in millions)2018
 2017
 2018
 2017
Receivables sold$269
 $273
 $336
 $312
Less: Retained interests93
 87
 118
 106
Net receivables sold$176
 $186
 $218
 $206
The following table shows sales and cash flows related to receivables sold.
Duke Energy Ohio Duke Energy IndianaDuke Energy Ohio Duke Energy Indiana
Years Ended December 31, Years Ended December 31,Years Ended December 31, Years Ended December 31,
(in millions)2017
 2016
 2015
 2017
 2016
 2015
2018
 2017
 2016
 2018
 2017
 2016
Sales                      
Receivables sold$1,879
 $1,926
 $1,963
 $2,711
 $2,635
 $2,627
$1,987
 $1,879
 $1,926
 $2,842
 $2,711
 $2,635
Loss recognized on sale10
 9
 9
 12
 11
 11
13
 10
 9
 16
 12
 11
Cash Flows                      
Cash proceeds from receivables sold1,865
 1,882
 1,995
 2,694
 2,583
 2,670
1,967
 1,865
 1,882
 2,815
 2,694
 2,583
Collection fees received1
 1
 1
 1
 1
 1
1
 1
 1
 1
 1
 1
Return received on retained interests3
 2
 3
 7
 5
 5
6
 3
 2
 9
 7
 5
Cash flows from the sales of receivables are reflected within Cash Flows From Operating Activities on Duke Energy Ohio’s and Duke Energy Indiana’s Consolidated Statements of Cash Flows.
Collection fees received in connection with servicing transferred accounts receivable are included in Operation, maintenance and other on Duke Energy Ohio’s and Duke Energy Indiana’s Consolidated Statements of Operations and Comprehensive Income. The loss recognized on sales of receivables is calculated monthly by multiplying receivables sold during the month by the required discount. The required discount is derived monthly utilizing a three-year weighted average formula that considers charge-off history, late charge history and turnover history on the sold receivables, as well as a component for the time value of money. The discount rate, or component for the time value of money, is the prior month-end LIBOR plus a fixed rate of 1.00 percent.
18. REVENUE
As described in Note 1, Duke Energy adopted Revenue from Contracts with Customers effective January 1, 2018, using the modified retrospective method of adoption, which does not require restatement of prior year reported results. No cumulative effect adjustment was recorded as the vast majority of Duke Energy’s revenues are at-will and without a defined contractual term. Additionally, comparative disclosures for 2018 operating results with the previous revenue recognition rules are not applicable as Duke Energy’s revenue recognition has not materially changed as a result of the new standard.
Duke Energy recognizes revenue consistent with amounts billed under tariff offerings or at contractually agreed upon rates based on actual physical delivery of electric or natural gas service, including estimated volumes delivered when billings have not yet occurred. As such, the majority of Duke Energy’s revenues have fixed pricing based on the contractual terms of the published tariffs, with variability in expected cash flows attributable to the customer’s volumetric demand and ultimate quantities of energy or natural gas supplied and used during the billing period. The stand-alone selling price of related sales are designed to support recovery of prudently incurred costs and an appropriate return on invested assets and are primarily governed by published tariff rates or contractual agreements approved by relevant regulatory bodies. As described in Note 1, certain excise taxes and franchise fees levied by state or local governments are required to be paid even if not collected from the customer. These taxes are recognized on a gross basis as part of revenues. Duke Energy elects to account for all other taxes net of revenues.
Performance obligations are satisfied over time as energy or natural gas is delivered and consumed with billings generally occurring monthly and related payments due within 30 days, depending on regulatory requirements. In no event does the timing between payment and delivery of the goods and services exceed one year. Using this output method for revenue recognition provides a faithful depiction of the transfer of electric and natural gas service as customers obtain control of the commodity and benefit from its use at delivery. Additionally, Duke Energy has an enforceable right to consideration for energy or natural gas delivered at any discrete point in time, and will recognize revenue at an amount that reflects the consideration to which Duke Energy is entitled for the energy or natural gas delivered.



FINANCIAL STATEMENTSREVENUE


As described above, the majority of Duke Energy’s tariff revenues are at-will and, as such, related contracts with customers have an expected duration of one year or less and will not have future performance obligations for disclosure. Additionally, other long-term revenue streams, including wholesale contracts, generally provide services that are part of a single performance obligation, the delivery of electricity or natural gas. As such, other than material fixed consideration under long-term contracts, related disclosures for future performance obligations are also not applicable.
Duke Energy earns substantially all of its revenues through its reportable segments, Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables.
Electric Utilities and Infrastructure
Electric Utilities and Infrastructure earns the majority of its revenues through retail and wholesale electric service through the generation, transmission, distribution and sale of electricity. Duke Energy generally provides retail and wholesale electric service customers with their full electric load requirements or with supplemental load requirements when the customer has other sources of electricity.
Retail electric service is generally marketed throughout Duke Energy's electric service territory through standard service offers. The standard service offers are through tariffs determined by regulators in Duke Energy's regulated service territory. Each tariff, which is assigned to customers based on customer class, has multiple components such as an energy charge, a demand charge, a basic facilities charge and applicable riders. Duke Energy considers each of these components to be aggregated into a single performance obligation for providing electric service, or in the case of distribution only customers in Duke Energy Ohio, for delivering electricity. Electricity is considered a single performance obligation satisfied over time consistent with the series guidance and is provided and consumed over the billing period, generally one month. Retail electric service is typically provided to at-will customers who can cancel service at any time, without a substantive penalty. Additionally, Duke Energy adheres to applicable regulatory requirements in each jurisdiction to ensure the collectability of amounts billed and appropriate mitigating procedures are followed when necessary. As such, revenue from contracts with customers for such contracts is equivalent to the electricity supplied and billed in that period (including unbilled estimates).
Wholesale electric service is generally provided under long-term contracts using cost-based pricing. FERC regulates costs that may be recovered from customers and the amount of return companies are permitted to earn. Wholesale contracts include both energy and demand charges. For full requirements contracts, Duke Energy considers both charges as a single performance obligation for providing integrated electric service. For contracts where energy and demand charges are considered separate performance obligations, energy and demand are each a distinct performance obligation under the series guidance and are satisfied as energy is delivered and stand-ready service is provided on a monthly basis. This service represents consumption over the billing period and revenue is recognized consistent with billings and unbilled estimates, which generally occur monthly. Contractual amounts owed are typically trued up annually based upon incurred costs in accordance with FERC published filings and the specific customer’s actual peak demand. Estimates of variable consideration related to potential additional billings or refunds owed are updated quarterly.
The majority of wholesale revenues are full requirements contracts where the customers purchase the substantial majority of their energy needs and do not have a fixed quantity of contractually required energy or capacity. As such, related forecasted revenues are considered optional purchases. Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations:
 Remaining Performance Obligations
(in millions)2019
2020
2021
2022
2023
Thereafter
Total
Progress Energy$112
$121
$80
$82
$39
$42
$476
Duke Energy Progress9
9
9
9
9
9
54
Duke Energy Florida103
112
71
73
30
33
422
Duke Energy Indiana9
10
5



24
Revenues for block sales are recognized monthly as energy is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates.
Gas Utilities and Infrastructure
Gas Utilities and Infrastructure earns its revenue through retail and wholesale natural gas service through the transportation, distribution and sale of natural gas. Duke Energy generally provides retail and wholesale natural gas service customers with all natural gas load requirements. Additionally, while natural gas can be stored, substantially all natural gas provided by Duke Energy is consumed by customers simultaneously with receipt of delivery.
Retail natural gas service is marketed throughout Duke Energy's natural gas service territory using published tariff rates. The tariff rates are established by regulators in Duke Energy's service territories. Each tariff, which is assigned to customers based on customer class, have multiple components, such as a commodity charge, demand charge, customer or monthly charge and transportation costs. Duke Energy considers each of these components to be aggregated into a single performance obligation for providing natural gas service. For contracts where Duke Energy provides all of the customer’s natural gas needs, the delivery of natural gas is considered a single performance obligation satisfied over time, and revenue is recognized monthly based on billings and unbilled estimates as service is provided and the commodity is consumed over the billing period. Additionally, natural gas service is typically at-will and customers can cancel service at any time, without a substantive penalty. Duke Energy also adheres to applicable regulatory requirements to ensure the collectability of amounts billed and receivable and appropriate mitigating procedures are followed when necessary.



FINANCIAL STATEMENTSREVENUE


Certain long-term individually negotiated contracts exist to provide natural gas service. These contracts are regulated and approved by state commissions. The negotiated contracts have multiple components, including a natural gas and a demand charge, similar to retail natural gas contracts. Duke Energy considers each of these components to be a single performance obligation for providing natural gas service. This service represents consumption over the billing period, generally one month.
Fixed capacity payments under long-term contracts for the Gas Utilities and Infrastructure segment include minimum margin contracts and supply arrangements with municipalities and power generation facilities. Revenues for related sales are recognized monthly as natural gas is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Estimated remaining performance obligations are as follows:
 Remaining Performance Obligations
(in millions)2019
2020
2021
2022
2023
Thereafter
Total
Piedmont$70
$68
$63
$63
$60
$430
$754
Commercial Renewables
Commercial Renewables earns the majority of its revenues through long-term PPAs and generally sells all of its wind and solar facility output, electricity and RECs to customers. The majority of these PPAs have historically been accounted for as leases. For PPAs that are not accounted for as leases, the delivery of electricity and the delivery of RECs are considered separate performance obligations.
The delivery of electricity is a performance obligation satisfied over time and represents generation and consumption of the electricity over the billing period, generally one month. The delivery of RECs is a performance obligation satisfied at a point in time and represents delivery of each REC generated by the wind or solar facility. The majority of self-generated RECs are bundled with energy in Duke Energy’s contracts and, as such, related revenues are recognized as energy is generated and delivered as that pattern is consistent with Duke Energy’s performance. Commercial Renewables recognizes revenue based on the energy generated and billed for the period, generally one month, at contractual rates (including unbilled estimates) according to the invoice practical expedient. Amounts are typically due within 30 days of invoice.
Commercial Renewables also earns revenues from installation of distributed solar generation resources, which is primarily composed of EPC projects to deliver functioning solar power systems, generally completed within two to 12 months from commencement of construction. The installation of distributed solar generation resources is a performance obligation that is satisfied over time. Revenue from fixed-price EPC contracts is recognized using the input method as work is performed based on the estimated ratio of incurred costs to estimated total costs.
Other
The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers.



FINANCIAL STATEMENTSREVENUE


Disaggregated Revenues
For the Electric and Gas Utility and Infrastructure segments, revenue by customer class is most meaningful to Duke Energy as each respective customer class collectively represents unique customer expectations of service, generally has different energy and demand requirements, and operates under tailored, regulatory approved pricing structures. Additionally, each customer class is impacted differently by weather and a variety of economic factors including the level of population growth, economic investment, employment levels, and regulatory activities in each of Duke Energy’s jurisdictions. As such, analyzing revenues disaggregated by customer class allows Duke Energy to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. For the Commercial Renewables segment, the majority of revenues from contracts with customers are from selling all of the unit-contingent output at contractually defined pricing under long-term PPAs with consistent expectations regarding the timing and certainty of cash flows. Disaggregated revenues are presented as follows:
 Year Ended December 31, 2018
  Duke
 Duke
Duke
Duke
Duke
 
(in millions)Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
By market or type of customerEnergy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Electric Utilities and Infrastructure        
   Residential$9,587
$2,981
$4,785
$2,019
$2,766
$743
$1,076
$
   General6,127
2,119
2,809
1,280
1,529
422
778

   Industrial2,974
1,180
904
642
262
131
760

   Wholesale2,324
508
1,462
1,303
159
57
298

   Other revenues717
320
502
320
182
73
91

Total Electric Utilities and Infrastructure revenue from contracts with customers$21,729
$7,108
$10,462
$5,564
$4,898
$1,426
$3,003
$
         
Gas Utilities and Infrastructure        
   Residential$1,000
$
$
$
$
$331
$
$669
   Commercial514




135

378
   Industrial147




18

128
   Power Generation






54
   Other revenues139




19

120
Total Gas Utilities and Infrastructure revenue from contracts with customers$1,800
$
$
$
$
$503
$
$1,349
         
Commercial Renewables        
Revenue from contracts with customers$209
$
$
$
$
$
$
$
         
Other        
Revenue from contracts with customers$19
$
$
$
$
$1
$
$
         
Total revenue from contracts with customers$23,757
$7,108
$10,462
$5,564
$4,898
$1,930
$3,003
$1,349
         
Other revenue sources(a)
$764
$192
$266
$135
$123
$27
$56
$26
Total revenues$24,521
$7,300
$10,728
$5,699
$5,021
$1,957
$3,059
$1,375
(a)Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues.
IMPACT OF WEATHER AND THE TIMING OF BILLING PERIODS
Revenues and costs are influenced by seasonal weather patterns. Peak sales of electricity occur during the summer and winter months, which results in higher revenue and cash flows during these periods. By contrast, lower sales of electricity occur during the spring and fall, allowing for scheduled plant maintenance. Residential and general service customers are more impacted by weather than industrial customers. Estimated weather impacts are based on actual current period weather compared to normal weather conditions. Normal weather conditions are defined as the long-term average of actual historical weather conditions. Heating-degree days measure the variation in weather based on the extent the average daily temperature falls below a base temperature. Cooling-degree days measure the variation in weather based on the extent the average daily temperature rises above the base temperature. Each degree of temperature below the base temperature counts as one heating-degree day and each degree of temperature above the base temperature counts as one cooling-degree day.



FINANCIAL STATEMENTSREVENUE


The estimated impact of weather on earnings for Electric Utilities and Infrastructure is based on the temperature variances from a normal condition and customers' historic usage patterns. The methodology used to estimate the impact of weather does not consider all variables that may impact customer response to weather conditions, such as humidity in the summer or wind chill in the winter. The precision of this estimate may also be impacted by applying long-term weather trends to shorter-term periods.
Gas Utilities and Infrastructure's costs and revenues are influenced by seasonal patterns due to peak natural gas sales occurring during the winter months as a result of space heating requirements. Residential customers are the most impacted by weather. There are certain regulatory mechanisms for the North Carolina, South Carolina, Tennessee and Ohio service territories that normalize the margins collected from certain customer classes during the winter. In North Carolina, rate design provides protection from both weather and other usage variations such as conservation, while South Carolina and Tennessee revenues are adjusted solely based on weather. Ohio primarily employs a fixed charge each month regardless of the season and usage.
UNBILLED REVENUE
Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed. Unbilled revenues can vary significantly from period to period as a result of seasonality, weather, customer usage patterns, customer mix, average price in effect for customer classes, timing of rendering customer bills and meter reading schedules, and the impact of weather normalization or margin decoupling mechanisms.
Unbilled revenues are included within Receivables and Receivables of VIEs on the Consolidated Balance Sheets as shown in the following table.
 December 31,
(in millions)2018
 2017
Duke Energy$896
 $944
Duke Energy Carolinas313
 342
Progress Energy244
 228
Duke Energy Progress148
 143
Duke Energy Florida96
 85
Duke Energy Ohio2
 4
Duke Energy Indiana23
 21
Piedmont73
 86
Additionally, Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC and accounts for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 17 for further information. These receivables for unbilled revenues are shown in the table below.
 December 31,
(in millions)2018
 2017
Duke Energy Ohio$86
 $104
Duke Energy Indiana128
 132
19. COMMON STOCK
Basic Earnings Per Share (EPS)EPS is computed by dividing net income attributable to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income attributable to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common shares, such as stock options and equity forward sale agreements, were exercised or settled. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods.



FINANCIAL STATEMENTSCOMMON STOCK


The following table presents Duke Energy’s basic and diluted EPS calculations and reconciles the weighted average number of common stock outstanding to the diluted weighted average number of common stock outstanding.
Years Ended December 31,Years Ended December 31,
(in millions, except per share amounts)2017
 2016
 2015
2018
 2017
 2016
Income from continuing operations attributable to Duke Energy common stockholders excluding impact of participating securities$3,059
 $2,567
 $2,640
$2,642
 $3,059
 $2,567
Weighted average shares outstanding – basic700
 691
 694
708
 700
 691
Weighted average shares outstanding – diluted700
 691
 694
708
 700
 691
Earnings per share from continuing operations attributable to Duke Energy common stockholders          
Basic$4.37
 $3.71
 $3.80
$3.73
 $4.37
 $3.71
Diluted$4.37
 $3.71
 $3.80
$3.73
 $4.37
 $3.71
Potentially dilutive items excluded from the calculation(a)
2
 2
 2
2
 2
 2
Dividends declared per common share$3.49
 $3.36
 $3.24
$3.64
 $3.49
 $3.36
(a)Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met.
Equity Distribution AgreementIssuances
On February 20, 2018, Duke Energy filed a prospectus supplement and executed an Equity Distribution Agreement (the EDA)EDA under which it may sell up to $1 billion of its common stock through an at-the-marketATM offering program, including an equity forward sales component. The EDA was entered into with Wells Fargo Securities, LLC, Citigroup Global Markets Inc., and J.P. Morgan Securities LLC (the Agents). Under the terms of the EDA, Duke Energy may issue and sell, through eitherany of the Agents, shares of common stock during the period ending September 23, 2019.
In addition to the issuance and sales of shares byJune 2018, Duke Energy marketed two separate tranches, each for 1.3 million shares, of common stock. The first tranche was marketed with Wells Fargo Bank at an initial forward price of $72.02 per share and the second tranche was marketed with Citibank at an initial forward price of $78.71 per share through the Agents, Duke Energy may enter into Equity Forward Agreements with affiliates of the Agents as Forward Purchasers. There were noequity forward transactions under the EDA fromATM program. The Equity Forwards require Duke Energy to either physically settle the timetransactions by issuing 2.6 million shares in exchange for net proceeds at the then-applicable forward sale price specified by the agreements or net settle in whole or in part through the delivery or receipt of executioncash or shares. The settlement alternative was at Duke Energy's election. In December 2018, Duke Energy physically settled these equity forwards by delivering 2.6 million shares of common stock in exchange for net proceeds of approximately $195 million.
Separately, in March 2018, Duke Energy marketed an equity offering of 21.3 million shares of common stock through an Underwriting Agreement with Credit Suisse Securities (USA) LLC, J.P. Morgan Securities LLC, Barclays Capital Inc. and Goldman Sachs & Co. LLC, as representatives of several underwriters, Credit Suisse Capital LLC and J.P. Morgan Securities LLC as Forward Sellers, and Credit Suisse Capital LLC and J.P. Morgan Chase Bank, National Association, acting as forward purchasers. In connection with the offering, Duke Energy entered into equity forward sale agreements with Credit Suisse Securities (USA) LLC as Agent for Credit Suisse Capital LLC and J.P. Morgan Chase Bank, National Association. The sale price was $75 per share less certain net adjustments for an initial forward price of $74.07 per share. The Equity Forwards require Duke Energy to either physically settle the transactions by issuing 21.3 million shares in exchange for net proceeds at the then-applicable forward sale price specified by the agreements, or net settle in whole or in part through the delivery or receipt of cash or shares. The settlement alternative was at Duke Energy's election. In June 2018, Duke Energy physically settled one-half of the EDA toequity forwards by delivering approximately 10.6 million shares of common stock in exchange for net cash proceeds of approximately $781 million. In December 2018, Duke Energy physically settled the filingremaining equity forward by delivering 10.6 million shares of this document.common stock in exchange for net cash proceeds of approximately $766 million.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Stock IssuanceFor the year ended December 31, 2018, Duke Energy issued 2.2 million shares through its DRIP with an increase in additional paid-in capital of approximately $174 million.
In March 2016, Duke Energy marketed an equity offering of 10.6 million shares of common stock. In lieu of issuing equity at the time of the offering, Duke Energy entered into Equity Forwards with Barclays. The Equity Forwards required Duke Energy to either physically settle the transactions by issuing 10.6 million shares, or net settle in whole or in part through the delivery or receipt of cash or shares.
On October 5, 2016, following the close of the Piedmont acquisition, Duke Energy physically settled the Equity Forwards in full by delivering 10.6 million shares of common stock in exchange for net cash proceeds of approximately $723 million. The net proceeds were used to finance a portion of the Piedmont acquisition. As a result of the acquisition, all of Piedmont's issued and outstanding stock became the issued and outstanding shares of a wholly owned subsidiary of Duke Energy. See Note 2 for additional information related to the Piedmont acquisition.
Accelerated Stock Repurchase Program
On April 6, 2015,20. SEVERANCE
During 2018, Duke Energy entered into agreementsreviewed its operations and identified opportunities for improvement to better serve its customers. This operational review included the company's workforce strategy and staffing levels to ensure the company is staffed with eachthe right skillsets and number of Goldman, Sachs & Co. and JPMorgan Chase Bank, National Association (the Dealers)teammates to repurchase a total of $1.5 billion ofexecute the long-term vision for Duke Energy. As such, Duke Energy common stock under an accelerated stock repurchase program (the ASR). Duke Energy made payments of $750 millionextended voluntary and involuntary severance benefits to each of the Dealers and was delivered 16.6 million shares, with a total fair value of $1.275 billion, which represented approximately 85 percent of the total number of shares of Duke Energy common stock expected to be repurchased under the ASR. The company recorded the $1.5 billion paymentcertain employees in specific areas as a reduction to common stock as of April 6, 2015. In June 2015, the Dealers delivered 3.2 million additional shares to Duke Energy to complete the ASR. Approximately 19.8 million shares, in total, were delivered to Duke Energy and retired under the ASR at an average price of $75.75 per share. The final number of shares repurchased was based upon the average of the daily volume weighted average stock prices of Duke Energy’s common stock during the term of the program, less a discount.
19. SEVERANCE
As part of its strategicworkforce planning processes, Duke Energy implemented targeted cost savings initiatives during 2016 and 2015 aimed at reducing operations and maintenance expense. The initiatives included efforts to reduce costs through the standardization of processes and systems, leveraging technology and workforce optimization throughout the company.digital transformation efforts.
During 2016, Duke Energy and Piedmont announced severance plans covering certain eligible employees whose employment will be involuntarily terminated without cause as a result of Duke Energy's acquisition of Piedmont. These reductions continue to be implementedcontinued into 2017 and arewere a part of the synergies expected to be realized with the acquisition. Refer to Note 2 for additional information on the Piedmont acquisition.



FINANCIAL STATEMENTSSEVERANCE

Severance benefit costscharges for initiatives and plans discussed above were accrued for a total of approximately 1,900 employees in 2018, 100 employees in 2017 and 600 employees in 2016 and 900 employees in 2015.2016. The following table presents the direct and allocated severance and related expensescharges recorded by the Duke Energy Registrants. Amounts are included within Operation, maintenance and other on the Consolidated Statements of Operations.
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont(a)

Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont(a)

Year Ended December 31, 2018$187
$102
$69
$52
$17
$6
$7
$2
Year Ended December 31, 2017$15
$2
$2
$1
$1
$
$1
$9
15
2
2
1
1

1
9
Year Ended December 31, 2016118
39
40
23
17
3
7
 118
39
40
23
17
3
7
 
Year Ended December 31, 2015142
93
36
28
8
2
6
 
(a)Piedmont severance benefit costscharges were $3 million for the two months ended December 31, 2016, and $19 million for the year ended October 31, 2016. Piedmont did not record any severance benefit costs for the year ended October 31, 2015.
The table below presents the severance liability for past and ongoing severance plans including the plans described above. Amounts for Duke Energy Indiana and Duke Energy Ohio are not material.
 Duke
 Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Energy
Carolinas
Energy
Progress
Florida
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Balance at December 31, 2016$79
$13
$14
$6
$8
$20
Balance at December 31, 2017$19
$5
$2
$1
$
$
$
$5
Provision/Adjustments17
2



9
200
98
50
40
10
2
2

Cash Reductions(77)(10)(12)(5)(8)(24)(14)(3)(1)
(1)

(5)
Balance at December 31, 2017$19
$5
$2
$1
$
$5
Balance at December 31, 2018$205
$100
$51
$41
$9
$2
$2
$
20.21. STOCK-BASED COMPENSATION
The Duke Energy Corporation 2015 Long-Term Incentive Plan (the 2015 Plan) provides for the grant of stock-based compensation awards to employees and outside directors. The 2015 Plan reserves 10 million shares of common stock for issuance. Duke Energy has historically issued new shares upon exercising or vesting of share-based awards. However, Duke Energy may use a combination of new share issuances and open market repurchases for share-based awards that are exercised or vest in the future. Duke Energy has not determined with certainty the amount of such new share issuances or open market repurchases.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table summarizes the total expense recognized by the Duke Energy Registrants, net of tax, for stock-based compensation.
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Duke Energy$43
 $35
 $38
$56
 $43
 $35
Duke Energy Carolinas15
 12
 14
20
 15
 12
Progress Energy16
 12
 14
21
 16
 12
Duke Energy Progress10
 7
 9
13
 10
 7
Duke Energy Florida6
 5
 5
8
 6
 5
Duke Energy Ohio3
 2
 2
4
 3
 2
Duke Energy Indiana4
 3
 4
5
 4
 3
Piedmont(a)
3
    3
 3
  
(a)    See discussion below for information on Piedmont's pre-merger stock-based compensation plans.
(a)Piedmont's stock-based compensation costs were not material for the two months ended December 31, 2016. See discussion below for information on Piedmont's pre-merger stock-based compensation plans.
Duke Energy's pretax stock-based compensation costs, the tax benefit associated with stock-based compensation expense and stock-based compensation costs capitalized are included in the following table.
Years Ended December 31,Years Ended December 31,
(in millions)2017
 2016
 2015
2018
 2017
 2016
Restricted stock unit awards$41
 $36
 $38
$43
 $41
 $36
Performance awards27
 19
 23
35
 27
 19
Pretax stock-based compensation cost$68
 $55
 $61
$78
 $68
 $55
Stock-based compensation costs capitalized5
 4
 2
Stock-based compensation expense$73
 $64
 $53
Tax benefit associated with stock-based compensation expense$25
 $20
 $23
$17
 $25
 $20
Stock-based compensation costs capitalized4
 2
 3



FINANCIAL STATEMENTSSTOCK-BASED COMPENSATION


RESTRICTED STOCK UNIT AWARDS
Restricted stock unit (RSU)RSU awards generally vest over periods from immediate to three years. Fair value amounts are based on the market price of Duke Energy's common stock on the grant date. The following table includes information related to restricted stock unitRSU awards.
Years Ended December 31,Years Ended December 31,
2017
 2016
 2015
2018
 2017
 2016
Shares awarded (in thousands)583
 684
 524
649
 583
 684
Fair value (in millions)$47
 $52
 $41
$49
 $47
 $52
The following table summarizes information about restricted stock unitRSU awards outstanding.
  Weighted Average
  Weighted Average
Shares
 Grant Date Fair Value
Shares
 Grant Date Fair Value
(in thousands)
 (per share)
(in thousands)
 (per share)
Outstanding at December 31, 20161,139
 $76
Outstanding at December 31, 20171,121
 $78
Granted583
 80
649
 76
Vested(553) 76
(545) 78
Forfeited(48) 78
(72) 77
Outstanding at December 31, 20171,121
 78
Outstanding at December 31, 20181,153
 77
Restricted stock unit awards expected to vest1,094
 78
1,101
 77
The total grant date fair value of shares vested during the years ended December 31, 2018, 2017 and 2016, and 2015 was $43 million, $42 million $38 million and $41$38 million, respectively. At December 31, 2017,2018, Duke Energy had $29 million of unrecognized compensation cost, which is expected to be recognized over a weighted average period of twenty-three23 months.
PERFORMANCE AWARDS
Stock-based performance awards generally vest after three years if performance targets are met.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The actual number of shares issued will range from zero to 200 percent of target shares, depending on the level of performance achieved.
Performance awards granted in 2017, 2016 and 2015 contain market conditions based on the total shareholder return (TSR) of Duke Energy stock relative TSR compared to a predefined peer group, (relative TSR). Theseas well as a performance condition based on Duke Energy's cumulative adjusted EPS. Performance awards aregranted in 2018 and 2017 also contain a performance condition based on the total incident case rate, one of our key employee safety metrics.
The market condition component of Duke Energy's performance awards is valued using a path-dependent model that incorporates expected relative TSR into the fair value determination of Duke Energy’s performance-based share awards. The model uses three-year historical volatilities and correlations for all companies in the predefined peer group, including Duke Energy, to simulate Duke Energy’s relative TSR as of the end of the performance period. For each simulation, Duke Energy’s relative TSR associated with the simulated stock price at the end of the performance period plus expected dividends within the period results in a value per share for the award portfolio. The average of these simulations is the expected portfolio value per share. Actual life to date results of Duke Energy’s relative TSR for each grant are incorporated within the model. For performance awards granted in 2017,2018, the model used a risk-free interest rate of 1.52.4 percent, which reflects the yield on three-year Treasury bonds as of the grant date, and an expected volatility of 17.216.0 percent based on Duke Energy's historical volatility over three years using daily stock prices.
In addition to TSR, performance awards granted in 2017 and 2016 contain a performance condition based on Duke Energy's cumulative adjusted EPS. Performance awards granted in 2017 also contain a performance condition based on the total incident case rate, one of our key employee safety metrics. The actual number of shares issued will range from zero to 200 percent of target shares depending on the level of performance achieved.
The following table includes information related to stock-based performance awards.
Years Ended December 31,Years Ended December 31,
2017
 2016
 2015
2018
 2017
 2016
Shares granted assuming target performance (in thousands)461
 338
 321
372
 461
 338
Fair value (in millions)$37
 $25
 $26
$27
 $37
 $25




FINANCIAL STATEMENTSSTOCK-BASED COMPENSATION


The following table summarizes information about stock-based performance awards outstanding and assumes payout at the target level.
  Weighted Average
  Weighted Average
Shares
 Grant Date Fair Value
Shares
 Grant Date Fair Value
(in thousands)
 (per share)
(in thousands)
 (per share)
Outstanding at December 31, 2016862
 $75
Outstanding at December 31, 20171,065
 $79
Granted461
 81
372
 73
Vested(155) 81
Forfeited(258) 69
(165) 80
Outstanding at December 31, 20171,065
 79
Outstanding at December 31, 20181,117
 77
Stock-based performance awards expected to vest1,034
 79
1,086
 77
No performance awards vested during the year ended December 31, 2017. The total grant date fair value of shares vested during the years ended December 31, 2018, and 2016, was $13 million and 2015 was $25 million, and $26 million, respectively. No performance awards vested during the year ended December 31, 2017. At December 31, 2017,2018, Duke Energy had $34$30 million of unrecognized compensation cost, which is expected to be recognized over a weighted average period of twenty-three21 months.
STOCK OPTIONS
Stock options, when granted, have a maximum option term of 10 years and with an exercise price not less than the market price of Duke Energy's common stock on the grant date. There were no stock options granted or exercised during the year ended December 31, 2017. There were no stock options outstanding at December 31, 2017.
The following table summarizes additional information related to stock options exercised and granted.
 Years Ended December 31,
(in millions)2016
 2015
Intrinsic value of options exercised$1
 $5
Tax benefit related to options exercised
 2
Cash received from options exercised7
 17
PIEDMONT
Prior to Duke Energy's acquisition of Piedmont, Piedmont had an incentive compensation plan that had a series of three-year performance and RSU awards for eligible officers and other participants. The Agreement and Plan of Merger (Merger Agreement) between Duke Energy and PiedmontAgreement provided for the conversion of the 2014-2016 and 2015-2017 performance awards and the nonvested 2016 RSU award into the right to receive $60 cash per share upon the close of the transaction. In December 2015, Piedmont's board of directors authorized the accelerated vesting, payment and taxation of the 2014-2016 and 2015-2017 performance awards, as well as the 2016 RSU award, at the election of the participant. Substantially all participants elected to accelerate the settlement of these awards. As a result of the settlement of these awards, 194 thousand shares of Piedmont shares were issued to participants, net of shares withheld for applicable federal and state income taxes, at a closing price of $56.85 and a fair value of $11 million. The 2016-2018 performance award cycle was approved subsequent to the Merger Agreement and was converted into a Duke Energy RSU award as discussed above at the consummation of the acquisition.

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PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Piedmont's stock-based compensation costs and the tax benefit associated with stock-based compensation expense are included in the following table. Piedmont's stock-based compensation costs were not material for the two months ended December 31, 2016.
Years Ended October 31,
(in millions)2016
 2015
Year Ended October 31, 2016
Pretax stock-based compensation cost$16
 $14
$16
Tax benefit associated with stock-based compensation expense6
 4
6
Net of tax stock-based compensation cost$10
 $10
$10
21.22. EMPLOYEE BENEFIT PLANS
DEFINED BENEFIT RETIREMENT PLANS
Duke Energy and certain subsidiaries maintain, and the Subsidiary Registrants participate in, qualified, non-contributory defined benefit retirement plans. The Duke Energy plans cover most employees using a cash balance formula. Under a cash balance formula, a plan participant accumulates a retirement benefit consisting of pay credits based upon a percentage of current eligible earnings, age or age and years of service and interest credits. Certain employees are eligible for benefits that use a final average earnings formula. Under these final average earnings formulas, a plan participant accumulates a retirement benefit equal to the sum of percentages of their (i) highest three-year, four-year, or five-year average earnings, (ii) highest three-year, four-year, or five-year average earnings in excess of covered compensation per year of participation (maximum of 35 years), or (iii) highest three-year average earnings times years of participation in excess of 35 years. Duke Energy also maintains, and the Subsidiary Registrants participate in, non-qualified, non-contributory defined benefit retirement plans that cover certain executives. The qualified and non-qualified, non-contributory defined benefit plans are closed to new participants.
Duke Energy approved plan amendments to restructure its qualified non-contributory defined benefit retirement plans, effective January 1, 2018. The restructuring involved (i) the spin-off of the majority of inactive participants from two plans into a separate inactive plan and (ii) the merger of the active participant portions of such plans, along with a pension plan acquired as part of the Piedmont transaction, into a single active plan. Benefits offered to the plan participants remain unchanged except that the Piedmont plan's final average earnings formula was frozen as of December 31, 2017, and affected participants were moved into the active plan's cash balance formula. Actuarial gains and losses associated with the Inactive Plan will be amortized over the remaining life expectancy of the inactive participants. The longer amortization period is expected to lowerlowered Duke Energy's 2018 pretax qualified pension plan expense by approximately $33 million.
Duke Energy uses a December 31 measurement date for its defined benefit retirement plan assets and obligations.



FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS


Net periodic benefit costs disclosed in the tables below represent the cost of the respective benefit plan for the periods presented. However, portionspresented prior to capitalization of amounts reflected as Net property, plant and equipment, on the Consolidated Balance Sheets. Only the service cost component of net periodic benefit costs disclosedis eligible to be capitalized. The remaining non-capitalized portions of net periodic benefit costs are classified as either: (1) service cost, which is recorded in Operations, maintenance and other on the tables below have been capitalizedConsolidated Statements of Operations; or as a component(2) components of property, plantnon-service cost, which is recorded in Other income and equipment.expenses, net, on the Consolidated Statements of Operations. Amounts presented in the tables below for the Subsidiary Registrants represent the amounts of pension and other post-retirement benefit cost allocated by Duke Energy for employees of the Subsidiary Registrants. Additionally, the Consolidated Statements of Operations of the Subsidiary Registrants arealso include allocated net periodic benefit costs for their proportionate share of pension and post-retirement benefit cost for employees of Duke Energy’s shared services affiliate that provide support to the Subsidiary Registrants. However, in the tables below, these amounts are only presented within the Duke Energy column. These allocated amounts are included in the governance and shared service costs discussed in Note 13.
Duke Energy’s policy is to fund amounts on an actuarial basis to provide assets sufficient to meet benefit payments to be paid to plan participants. Duke Energy does not anticipate making any contributions in 2019. The following table includes information related to the Duke Energy Registrants’ contributions to its qualified defined benefit pension plans.
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 
Piedmont(a)

Anticipated Contributions:  
  
   
   
   
   
   
   
  
Total anticipated 2018 contributions$148
 $46
 $45
 $25
 $20
 $
 $8
 $7
Contributions made January 2, 2018141
 46
 45
 25
 20
 
 8
 
Contributions to be made in 2018$7
 $
 $
 $
 $
 $
 $
 $7
Contributions Made:  
  
   
   
   
   
   
   
  
2017$19
 $
 $
 $
 $
 $4
 $
 $11
2016155
 43
 43
 24
 20
 5
 9
 

2015302
 91
 83
 42
 40
 8
 19
 

   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 
Piedmont(a)

Contributions Made:  
  
   
   
   
   
   
   
  
2018$141
 $46
 $45
 $25
 $20
 $
 $8
 $
201719
 
 
 
 
 4
 
 11
2016155
 43
 43
 24
 20
 5
 9
 

(a)Piedmont contributed $10 million to its U.S. qualified defined benefit pension plan during the two months ended December 31, 2016, and $10 million for each of the yearsyear ended October 31, 2016, and 2015, respectively.2016.



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FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

QUALIFIED PENSION PLANS
Components of Net Periodic Pension Costs
Year Ended December 31, 2017Year Ended December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Service cost $159
 $48
 $45
 $26
 $19
 $4
 $9
 $10
$182
 $58
 $51
 $29
 $22
 $5
 $11
 $7
Interest cost on projected benefit obligation 328
 79
 100
 47
 53
 18
 26
 14
299
 72
 94
 43
 50
 17
 23
 11
Expected return on plan assets (545) (142) (167) (82) (85) (27) (42) (24)(559) (147) (178) (85) (91) (28) (42) (22)
Amortization of actuarial loss 146
 31
 52
 23
 29
 5
 12
 11
132
 29
 44
 21
 23
 5
 10
 11
Amortization of prior service credit(24) (8) (3) (2) (1) (1) (2) (2)(32) (8) (3) (2) (1) 
 (2) (10)
Settlement charge12
 
 
 
 
 
 
 12
Other 8
 2
 2
 1
 1
 
 1
 1
Net periodic pension costs(a)(b)
$84

$10
 $29
 $13
 $16
 $(1) $4
 $22
$22

$4
 $8
 $6
 $3
 $(1) $
 $(3)
Year Ended December 31, 2016Year Ended December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Service cost $147
 $48
 $42
 $24
 $19
 $4
 $9
$159
 $48
 $45
 $26
 $19
 $4
 $9
 $10
Interest cost on projected benefit obligation 335
 86
 106
 49
 55
 19
 28
328
 79
 100
 47
 53
 18
 26
 14
Expected return on plan assets (519) (142) (168) (82) (84) (27) (42)(545) (142) (167) (82) (85) (27) (42) (24)
Amortization of actuarial loss 134
 33
 51
 23
 29
 4
 11
146
 31
 52
 23
 29
 5
 12
 11
Amortization of prior service (credit)(17) (8) (3) (2) (1) 
 (1)
Amortization of prior service credit(24) (8) (3) (2) (1) (1) (2) (2)
Settlement charge3
 
 
 
 
 
 
12
 
 
 
 
 
 
 12
Other 8
 2
 3
 1
 1
 1
 1
8
 2
 2
 1
 1
 
 1
 1
Net periodic pension costs(a)(b)
$91
 $19
 $31
 $13
 $19
 $1
 $6
$84
 $10
 $29
 $13
 $16
 $(1) $4
 $22
Year Ended December 31, 2015Year Ended December 31, 2016
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Service cost $159
 $50
 $44
 $23
 $20
 $4
 $10
$147
 $48
 $42
 $24
 $19
 $4
 $9
Interest cost on projected benefit obligation 324
 83
 104
 48
 54
 18
 27
335
 86
 106
 49
 55
 19
 28
Expected return on plan assets (516) (139) (171) (79) (87) (26) (42)(519) (142) (168) (82) (84) (27) (42)
Amortization of actuarial loss 166
 39
 65
 33
 31
 7
 13
134
 33
 51
 23
 29
 4
 11
Amortization of prior service (credit) cost(15) (7) (3) (2) (1) 
 1
Amortization of prior service credit(17) (8) (3) (2) (1) 
 (1)
Settlement charge3
 
 
 
 
 
 
Other 8
 2
 3
 1
 1
 
 1
8
 2
 3
 1
 1
 1
 1
Net periodic pension costs(a)(b)
$126
 $28
 $42
 $24
 $18
 $3
 $10
$91
 $19
 $31
 $13
 $19
 $1
 $6
(a)Duke Energy amounts exclude $5 million, $7 million $8 million and $9$8 million for the years ended December 2018, 2017 2016 and 2015,2016, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006.
(b)Duke Energy Ohio amounts exclude $3$2 million, $4$3 million and $4 million for the years ended December 2018, 2017 2016 and 2015,2016, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006.



222

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

PiedmontPiedmont
Two Months Ended Years Ended October 31,Two Months Ended Year Ended
(in millions)
December 31, 2016 2016 2015December 31, 2016 October 31, 2016
Service cost $2
 $11
 $11
$2
 $11
Interest cost on projected benefit obligation 2
 9
 12
2
 9
Expected return on plan assets (4) (24) (24)(4) (24)
Amortization of actuarial loss 2
 8
 9
2
 8
Amortization of prior service credit(1) (2) (2)(1) (2)
Settlement charge3
 
 
3
 
Net periodic pension costs$4
 $2
 $6
$4
 $2
Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets
Year Ended December 31, 2017Year Ended December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Regulatory assets, net (decrease) increase$(212) $(70) $(49) $(37) $(11) $9
 $(19) $(64)
Regulatory assets, net increase (decrease)$298
 $170
��$40
 $31
 $9
 $10
 $30
 $8
Accumulated other comprehensive loss (income)                              
Deferred income tax expense$
 
 3
 
 
 
 
 
$(2) 
 1
 
 
 
 
 
Prior year service cost arising during the year1
 
 
 
 
 
 
 
Amortization of prior year service credit1
 
 
 
 
 
 
 
Amortization of prior year actuarial losses (7) 
 (7) 
 
 
 
 
10
 
 (4) 
 
 
 
 
Net amount recognized in accumulated other comprehensive income $(6) $
 $(4) $
 $
 $
 $
 $
$9
 $
 $(3) $
 $
 $
 $
 $
Year Ended December 31, 2016Year Ended December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Regulatory assets, net increase$214
 $4
 $34
 $18
 $16
 $2
 $9
Regulatory assets, net (decrease) increase$(212) $(70) $(49) $(37) $(11) $9
 $(19) $(64)
Accumulated other comprehensive (income) loss   
   
   
   
   
   
   
  
   
   
   
   
   
   
  
Deferred income tax expense$4
 $
 $
 $
 $
 $
 $
$
 $
 $3
 $
 $
 $
 $
 $
Prior year service credit arising during the year (2) 
 
 
 
 
 
1
 
 
 
 
 
 
 
Amortization of prior year actuarial losses (7) 
 (1) 
 
 
 
(7) 
 (7) 
 
 
 
 
Net amount recognized in accumulated other comprehensive income $(5) $
 $(1) $
 $
 $
 $
$(6) $
 $(4) $
 $
 $
 $
 $
Piedmont's regulatory asset net increase was $34 million $35 million and $20$35 million for the two months ended December 31, 2016, and for the yearsyear ended October 31, 2016, and 2015, respectively.



223

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Reconciliation of Funded Status to Net Amount Recognized
  Year Ended December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Change in Projected Benefit Obligation  
  
                    
Obligation at prior measurement date  $8,448
 $2,029
 $2,637
 $1,211
 $1,410
 $479
 $669
 $313
Service cost  174
 56
 49
 28
 21
 5
 10
 7
Interest cost  299
 72
 94
 43
 50
 17
 23
 11
Actuarial gain(485) (44) (204) (87) (114) (29) (29) (18)
Transfers  
 
 
 
 
 
 
 (16)
Benefits paid  (567) (159) (143) (70) (72) (37) (55) (33)
Obligation at measurement date  $7,869

$1,954

$2,433

$1,125

$1,295

$435

$618
 $264
Accumulated Benefit Obligation at measurement date  $7,818
 $1,954
 $2,404
 $1,125
 $1,265
 $425
 $614
 $264
Change in Fair Value of Plan Assets  
  
   
   
   
   
   
   
  
Plan assets at prior measurement date  
$9,003
 $2,372
 $2,814
 $1,366
 $1,429
 $458
 $684
 $368
Employer contributions141
 46
 45
 25
 20
 
 8
 
Actual return on plan assets  (344) (91) (110) (53) (55) (16) (26) (14)
Benefits paid  (567) (159) (143) (70)
(72)
(37)
(55) (33)
Transfers  
 
 
 






 (16)
Plan assets at measurement date  $8,233
 $2,168
 $2,606
 $1,268
 $1,322
 $405
 $611
 $305
Funded status of plan  $364
 $214
 $173
 $143
 $27
 $(30) $(7) $41
  Year Ended December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Change in Projected Benefit Obligation  
                     
Obligation at prior measurement date  $8,131
 $1,952
 $2,512
 $1,158
 $1,323
 $447
 $658
 $344
Service cost  159
 48
 45
 26
 19
 4
 9
 10
Interest cost  328
 79
 100
 47
 53
 18
 26
 14
Actuarial loss455
 68
 158
 57
 99
 35
 26
 38
Transfers  
 27
 (32) (2) (15) 12
 
 
Plan amendments  (61) 
 
 
 
 
 
 (61)
Benefits paid  (537) (145) (146) (75) (69) (37) (50) (5)
Benefits paid — settlements(27) 
 
 
 
 
 
 (27)
Obligation at measurement date  $8,448
 $2,029
 $2,637
 $1,211
 $1,410
 $479
 $669
 $313
Accumulated Benefit Obligation at measurement date  
$8,369
 $2,029
 $2,601
 $1,211
 $1,375
 $468
 $652
 $313
Change in Fair Value of Plan Assets  
  
   
   
   
   
   
   
  
Plan assets at prior measurement date  $8,531
 $2,225
 $2,675
 $1,290
 $1,352
 $428
 $657
 $346
Employer contributions19
 
 
 
 
 4
 
 11
Actual return on plan assets  1,017
 265
 317
 153
 161
 51
 77
 43
Benefits paid  (537) (145) (146) (75) (69) (37) (50) (5)
Benefits paid — settlements(27) 
 
 
 
 
 
 (27)
Transfers  
 27
 (32) (2) (15) 12
 
 
Plan assets at measurement date  $9,003
 $2,372
 $2,814
 $1,366
 $1,429
 $458
 $684
 $368
Funded status of plan  $555
 $343
 $177
 $155
 $19
 $(21) $15
 $55
  Year Ended December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Change in Projected Benefit Obligation  
  
                    
Obligation at prior measurement date  $8,131
 $1,952
 $2,512
 $1,158
 $1,323
 $447
 $658
 $344
Service cost  159
 48
 45
 26
 19
 4
 9
 10
Interest cost  328
 79
 100
 47
 53
 18
 26
 14
Actuarial loss455
 68
 158
 57
 99
 35
 26
 38
Transfers  
 27
 (32) (2) (15) 12
 
 
Plan amendments  (61) 
 
 
 
 

 
 (61)
Benefits paid  (537) (145) (146) (75) (69) (37) (50) (5)
Benefits paid - settlements(27) 
 
 
 
 
 
 (27)
Obligation at measurement date  $8,448

$2,029

$2,637

$1,211

$1,410

$479

$669
 $313
Accumulated Benefit Obligation at measurement date  $8,369
 $2,029
 $2,601
 $1,211
 $1,375
 $468
 $652
 $313
Change in Fair Value of Plan Assets  
  
   
   
   
   
   
   
  
Plan assets at prior measurement date  
$8,531
 $2,225
 $2,675
 $1,290
 $1,352
 $428
 $657
 $346
Employer contributions19
 
 
 
 
 4
 
 11
Actual return on plan assets  1,017
 265
 317
 153
 161
 51
 77
 43
Benefits paid  (537) (145) (146) (75)
(69)
(37)
(50) (5)
Benefits paid - settlements

(27) 
 
 
 
 
 
 (27)
Transfers  
 27
 (32) (2)
(15)
12


 
Plan assets at measurement date  $9,003
 $2,372
 $2,814
 $1,366
 $1,429
 $458
 $684
 $368
Funded status of plan  $555
 $343
 $177
 $155
 $19
 $(21) $15
 $55

224

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)


  Year Ended December 31, 2016
   Duke
   Duke
 Duke
 Duke
 Duke
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Change in Projected Benefit Obligation  
                   
Obligation at prior measurement date  $7,727
 $1,995
 $2,451
 $1,143
 $1,276
 $453
 $649
Obligation assumed from acquisition352
 
 
 
 
 
 
Service cost  147
 48
 42
 24
 19
 4
 9
Interest cost  335
 86
 106
 49
 55
 19
 28
Actuarial loss307
 46
 111
 52
 57
 13
 41
Transfers  
 14
 (3) (3) 
 (3) 
Plan amendments  (52) (3) 
 
 
 (3) (15)
Benefits paid  (679) (234) (195) (107) (84) (36) (54)
Impact of settlements(6) 
 
 
 
 
 
Obligation at measurement date  $8,131
 $1,952
 $2,512
 $1,158
 $1,323
 $447
 $658
Accumulated Benefit Obligation at measurement date  
$8,006
 $1,952
 $2,479
 $1,158
 $1,290
 $436
 $649
Change in Fair Value of Plan Assets  
  
   
   
   
   
   
   
Plan assets at prior measurement date  $8,136
 $2,243
 $2,640
 $1,284
 $1,321
 $433
 $655
Assets received from acquisition343
 
 
 
 
 
 
Employer contributions155
 43
 43
 24
 20
 5
 9
Actual return on plan assets  582
 159
 190
 92
 95
 29
 47
Benefits paid  (679) (234) (195) (107) (84) (36) (54)
Impact of settlements(6) 
 
 
 
 
 
Transfers  
 14
 (3) (3) 
 (3) 
Plan assets at measurement date  $8,531
 $2,225
 $2,675
 $1,290
 $1,352
 $428
 $657
Funded status of plan  $400
 $273
 $163
 $132
 $29
 $(19) $(1)
  Piedmont
 Two Months Ended Years Ended
(in millions)  December 31, 2016  October 31, 2016
Change in Projected Benefit Obligation  
    
Obligation at prior measurement date  $352
 $312
Service cost  2
 11
Interest cost  2
 9
Actuarial gain(5) 34
Benefits paid  (1) (14)
Impact of settlements(6) 
Obligation at measurement date  $344
 $352
Accumulated Benefit Obligation at measurement date  
$289
 $296
Change in Fair Value of Plan Assets  
  
   
Plan assets at prior measurement date  $343
 $329
Employer contributions10
 10
Actual return on plan assets  
 18
Benefits paid  (1) (14)
Impact of settlements(6) 
Plan assets at measurement date  $346
 $343
Funded status of plan  $2
 $(9)
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS

225

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Amounts Recognized in the Consolidated Balance Sheets
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Prefunded pension(a)
$680
 $343
 $245
 $155
 $87
 $8
 $16
 $55
$433
 $214
 $242
 $143
 $96
 $24
 $39
 $41
Noncurrent pension liability(b)
$125
 $
 $68
 $
 $68
 $29
 $1
 $
$69
 $
 $69
 $
 $69
 $54
 $46
 $
Net asset (liability) recognized $555

$343

$177

$155

$19

$(21)
$15
 $55
$364

$214

$173

$143

$27

$(30)
$(7) $41
Regulatory assets $1,886
 $406
 $756
 $341
 $415
 $90
 $152
 $73
$2,184
 $576
 $796
 $372
 $424
 $100
 $182
 $81
Accumulated other comprehensive (income) loss   
   
   
   
   
   
   
   
  
   
   
   
   
   
   
   
Deferred income tax benefit$(41) $
 $(3) $
 $
 $
 $
 $
$(43) $
 $(2) $
 $
 $
 $
 $
Prior service credit (5) 
 
 
 
 
 
 
(4) 
 
 
 
 
 
 
Net actuarial loss 116
 
 9
 
 
 
 
 
126
 
 5
 
 
 
 
 
Net amounts recognized in accumulated other comprehensive loss$70
 $
 $6
 $
 $
 $
 $
 $
$79
 $
 $3
 $
 $
 $
 $
 $
Amounts to be recognized in net periodic pension costs in the next year   
   
   
   
   
   
   
   
  
   
   
   
   
   
   
   
Unrecognized net actuarial loss $132
 $29
 $44
 $21
 $23
 $5
 $7
 $11
$97
 $22
 $37
 $13
 $24
 $3
 $5
 $7
Unrecognized prior service credit
(32) (8) (3) (2) (1) 
 (2) (9)(32) (8) (3) (2) (1) 
 (2) (9)
December 31, 2016December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Prefunded pension(a)
$518
 $273
 $225
 $132
 $91
 $6
 $
 3
$680
 $343
 $245
 $155
 $87
 $8
 $16
 $55
Noncurrent pension liability(b)
$118
 $
 $62
 $
 $62
 $25
 $1
 
$125
 $
 $68
 $
 $68
 $29
 $1
 $
Net asset recognized $400
 $273
 $163
 $132
 $29
 $(19) $(1) $3
$555
 $343
 $177
 $155
 $19
 $(21) $15
 $55
Regulatory assets $2,098
 $476
 $805
 $378
 $426
 $81
 $171
 $137
$1,886
 $406
 $756
 $341
 $415
 $90
 $152
 $73
Accumulated other comprehensive (income) loss   
   
   
   
   
   
   
    
   
   
   
   
   
   
  
Deferred income tax benefit$(41) $
 $(6) $
 $
 $
 $
 $
$(41) $
 $(3) $
 $
 $
 $
 $
Prior service credit (6) 
 
 
 
 
 
 
(5) 
 
 
 
 
 
 
Net actuarial loss 123
 
 16
 
 
 
 
 
116
 
 9
 
 
 
 
 
Net amounts recognized in accumulated other comprehensive loss$76
 $
 $10
 $
 $
 $
 $
 $
$70
 $
 $6
 $
 $
 $
 $
 $
Amounts to be recognized in net periodic pension costs in the next year                              
Unrecognized net actuarial loss$147
 $31
 $52
 $23
 $29
 $5
 $8
 $13
$132
 $29
 $44
 $21
 $23
 $5
 $7
 $11
Unrecognized prior service credit$(24) $(8) $(3) $(2) $(1) $
 $(2) $(2)$(32) $(8) $(3) $(2) $(1) $
 $(2) $(9)
(a)Included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets.
(b)Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.



226

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets
December 31, 2017December 31, 2018
  Duke
Duke
 Duke
Duke
Duke
Duke
Progress
Energy
Energy
Duke
Progress
Energy
Energy
Energy
(in millions) Energy
Energy
Florida
Ohio
Energy
Energy
Florida
Ohio
Indiana
Projected benefit obligation $1,386
$718
$718
$337
$679
$679
$679
$123
$203
Accumulated benefit obligation 1,326
683
683
326
651
651
651
115
199
Fair value of plan assets 1,260
650
650
308
610
610
610
69
159
December 31, 2016December 31, 2017
 Duke
Duke
 Duke
Duke
Duke
Progress
Energy
Energy
Duke
Progress
Energy
Energy
(in millions) Energy
Energy
Florida
Ohio
Energy
Energy
Florida
Ohio
Projected benefit obligation $1,299
$665
$665
$311
$1,386
$718
$718
$337
Accumulated benefit obligation 1,239
633
633
299
1,326
683
683
326
Fair value of plan assets 1,182
604
604
286
1,260
650
650
308
Assumptions Used for Pension Benefits Accounting
The discount rate used to determine the current year pension obligation and following year’s pension expense is based on a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected.
The average remaining service period for participants in active plans and life expectancy of active covered employeesparticipants in inactive plans is 13 years for Duke Energy and Duke Energy Progress, 12 years for Duke Energy Carolinas, Progress Energy, and Duke Energy Florida, 14 years for Duke Energy Ohio and Duke Energy Indiana, and nine10 years for Piedmont.
The following tables present the assumptions or range of assumptions used for pension benefit accounting.
 December 31, December 31,
 2017 2016 2015 2018 2017 2016
Benefit Obligations                              
Discount rate    3.60%   4.10%   4.40%   4.30%   3.60%   4.10%
Salary increase 3.50%4.00% 4.00%4.50% 4.00%4.40% 3.50%4.00% 3.50%4.00% 4.00%4.50%
Net Periodic Benefit Cost                              
Discount rate    4.10%   4.40% 

 4.10%   3.60%   4.10% 

 4.40%
Salary increase
 4.00%4.50% 4.00%4.40% 4.00%4.40% 3.50%4.00% 4.00%4.50% 4.00%4.40%
Expected long-term rate of return on plan assets  6.50%6.75% 6.50%6.75% 

 6.50% 

 6.50% 6.50%6.75% 6.50%6.75%
 Piedmont Piedmont
 Two Months Ended Years Ended October 31, Two Months Ended Year Ended
 December 31, 2016 2016 2015 December 31, 2016 October 31, 2016
Benefit Obligations               
Discount rate  4.10% 3.80% 4.34% 4.10% 3.80%
Salary increase 4.50% 4.05% 4.07% 4.50% 4.05%
Net Periodic Benefit Cost     
   
     
Discount rate  3.80% 4.34% 4.13% 3.80% 4.34%
Salary increase
 4.05% 4.07% 3.68% 4.05% 4.07%
Expected long-term rate of return on plan assets  6.75% 7.25% 7.50% 6.75% 7.25%



227

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Expected Benefit Payments
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Years ending December 31,       
2018$642
$185
$161
$85
$75
$36
$47
$29
2019644
185
164
86
77
36
46
26
$662
$210
$179
$105
$73
$33
$47
$20
2020661
195
172
90
80
36
44
24
651
177
171
90
80
37
51
24
2021666
194
175
93
81
37
44
24
663
182
177
95
81
37
51
23
2022672
197
176
92
83
36
44
23
662
189
179
94
84
37
49
22
2023-20273,099
865
888
449
435
166
210
103
2023655
185
181
95
85
35
47
22
2024-20282,993
794
902
451
447
158
217
96
NON-QUALIFIED PENSION PLANS
Components of Net Periodic Pension Costs
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Service cost $2
$1
$
$
$
$
$
$
$2
$1
$
$
$
Interest cost on projected benefit obligation 13
1
5
1
2



12

4
1
2
Amortization of actuarial loss 8

2
1
1



8

2
1
1
Amortization of prior service credit (2)






(2)



Net periodic pension costs $21
$2
$7
$2
$3
$
$
$
$20
$1
$6
$2
$3
Year Ended December 31, 2016Year Ended December 31, 2017
 Duke
 Duke
Duke
Duke
Duke
 Duke
 Duke
Duke
Duke
Energy
Progress
Energy
Energy
Energy
Energy
Duke
Energy
Progress
Energy
Energy
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Energy
Carolinas
Energy
Progress
Florida
Service cost $2
$
$
$
$
$
$
$2
$1
$
$
$
Interest cost on projected benefit obligation 14
1
5
1
2


13
1
5
1
2
Amortization of actuarial loss 8
1
1
1
1


8

2
1
1
Amortization of prior service credit (1)





(2)



Net periodic pension costs $23
$2
$6
$2
$3
$
$
$21
$2
$7
$2
$3
Year Ended December 31, 2015Year Ended December 31, 2016
 Duke
 Duke
Duke
Duke
Duke
 Duke
 Duke
Duke
Duke
Energy
Progress
Energy
Energy
Energy
Energy
Duke
Energy
Progress
Energy
Energy
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Energy
Carolinas
Energy
Progress
Florida
Service cost $3
$
$1
$
$
$
$
$2
$
$
$
$
Interest cost on projected benefit obligation 13
1
4
1
2


14
1
5
1
2
Amortization of actuarial loss 6

2
1
2

1
8
1
1
1
1
Amortization of prior service credit (1)
(1)



(1)



Net periodic pension costs $21
$1
$6
$2
$4
$
$1
$23
$2
$6
$2
$3
PiedmontPiedmont
Years Ended October 31,Year Ended
(in millions)
20162015October 31, 2016
Amortization of prior service cost$
$1
$
Settlement charge1

1
Net periodic pension costs$1
$1
$1



228

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Regulatory assets, net (decrease) increase $5
$(1)$3
$1
$2
$
$
$
$(16)$1
$(6)$(3)$(3)
Accumulated other comprehensive (income) loss   
  
  
  
  
  
  
  
  
  
  
  
  
Deferred income tax benefit $(1)$
$
$
$
$
$
$
$1
$
$1
$
$
Actuarial loss arising during the year 2







Actuarial gain arising during the year (4)
(3)

Net amount recognized in accumulated other comprehensive loss (income) $1
$
$
$
$
$
$
$
$(3)$
$(2)$
$
Year Ended December 31, 2016Year Ended December 31, 2017
 Duke
 Duke
Duke
Duke
Duke
 Duke
 Duke
Duke
Duke
Energy
Progress
Energy
Energy
Energy
Energy
Duke
Energy
Progress
Energy
Energy
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Energy
Carolinas
Energy
Progress
Florida
Regulatory assets, net (decrease) increase $(3)$(2)$2
$1
$1
$
$(1)
Regulatory assets, net increase (decrease)$5
$(1)$3
$1
$2
Accumulated other comprehensive (income) loss   
Prior service credit arising during the year$(1)$
$
$
$
$
$
$(1)$
$
$
$
Actuarial gains arising during the year 1






Actuarial loss arising during the year 2




Net amount recognized in accumulated other comprehensive loss (income) $
$
$
$
$
$
$
$1
$
$
$
$
Reconciliation of Funded Status to Net Amount Recognized
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Change in Projected Benefit Obligation
  
  
  
  
  
  
  
   
  
  
  
  
  
  
 
Obligation at prior measurement date $332
$14
$114
$33
$46
$4
$3
$4
$331
$14
$116
$35
$47
$4
$3
$4
Service cost 2
1






2
1






Interest cost 13
1
5
1
2



12

4
1
2



Actuarial losses (gains)15

5
4
2



Actuarial gain(17)
(6)(2)(3)(1)
(1)
Benefits paid (31)(2)(8)(3)(3)


(24)(1)(8)(3)(3)


Obligation at measurement date $331
$14
$116
$35
$47
$4
$3
$4
$304
$14
$106
$31
$43
$3
$3
$3
Accumulated Benefit Obligation at measurement date
$331
$14
$116
$35
$47
$4
$3
$4
$304
$14
$106
$31
$43
$3
$3
$3
Change in Fair Value of Plan Assets
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Benefits paid $(31)$(2)$(8)$(3)$(3)$
$
$
$(24)$(1)$(8)$(3)$(3)$
$
$
Employer contributions 31
2
8
3
3



24
1
8
3
3



Plan assets at measurement date $
$
$
$
$
$
$
$
$
$
$
$
$
$
$
$



229

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Year Ended December 31, 2016Year Ended December 31, 2017
 Duke
 Duke
Duke
Duke
Duke
 Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Change in Projected Benefit Obligation
    
  
  
  
  
  
    
  
  
  
  
  
 
Obligation at prior measurement date $341
$16
$112
$33
$46
$4
$5
$332
$14
$114
$33
$46
$4
$3
$4
Obligation assumed from acquisition5






Service cost 2






2
1






Interest cost 14
1
5
1
2


13
1
5
1
2



Actuarial losses (gains)4
(1)5
2
1

(2)
Plan amendments(2)




 
Actuarial loss (gain)15

5
4
2



Benefits paid (32)(2)(8)(3)(3)

(31)(2)(8)(3)(3)


Obligation at measurement date $332
$14
$114
$33
$46
$4
$3
$331
$14
$116
$35
$47
$4
$3
$4
Accumulated Benefit Obligation at measurement date $332
$14
$114
$33
$46
$4
$3
$331
$14
$116
$35
$47
$4
$3
$4
Change in Fair Value of Plan Assets   
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Benefits paid $(32)$(2)$(8)$(3)$(3)

$(31)$(2)$(8)$(3)$(3)$
$
$
Employer contributions 32
2
8
3
3


31
2
8
3
3



Plan assets at measurement date $
$
$
$
$
$
$
$
$
$
$
$
$
$
$



  Piedmont
 Two Months Ended Years Ended
(in millions)  December 31, 2016  October 31, 2016
Change in Projected Benefit Obligation  
    
Obligation at prior measurement date  $5
 $6
Actuarial gain(1) 
Impact of settlements
 (1)
Obligation at measurement date  $4
 $5
Accumulated Benefit Obligation at measurement date  
$
 $5
Change in Fair Value of Plan Assets  
  
   
Plan assets at prior measurement date  $
 $1
Impact of settlements
 (1)
Plan assets at measurement date  $
 $
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS

230

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Amounts Recognized in the Consolidated Balance Sheets
December 31, 2017December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Current pension liability(a)
$23
$2
$8
$3
$3
$
$
$
$21
$2
$8
$3
$3
$
$
$
Noncurrent pension liability(b)
308
12
108
32
44
4
3
4
283
12
98
28
40
3
3
3
Total accrued pension liability $331
$14
$116
$35
$47
$4
$3
$4
$304
$14
$106
$31
$43
$3
$3
$3
Regulatory assets $78
$4
$21
$8
$13
$1
$
$1
$62
$5
$15
$5
$10
$1
$
$1
Accumulated other comprehensive (income) loss    
  
  
  
  
  
  
   
  
  
  
  
  
  
Deferred income tax benefit$(4)$
$(3)$
$
$
$
$
$(3)$
$(2)$
$
$
$
$
Prior service credit(1)






(1)






Net actuarial loss 12

9





8

6





Net amounts recognized in accumulated other comprehensive loss$7
$
$6
$
$
$
$
$
$4
$
$4
$
$
$
$
$
Amounts to be recognized in net periodic pension expense in the next year    
  
  
  
  
  
  
   
  
  
  
  
  
  
Unrecognized net actuarial loss $8
$
$2
$1
$1
$
$
$
$6
$
$2
$1
$1
$
$
$
Unrecognized prior service credit
(2)






(2)






December 31, 2016December 31, 2017
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Current pension liability(a)
$28
$2
$8
$2
$3
$
$
$
$23
$2
$8
$3
$3
$
$
$
Noncurrent pension liability(b)
304
12
106
31
43
4
3
4
308
12
108
32
44
4
3
4
Total accrued pension liability $332
$14
$114
$33
$46
$4
$3
$4
$331
$14
$116
$35
$47
$4
$3
$4
Regulatory assets $73
$5
$18
$7
$11
$1
$
$1
$78
$4
$21
$8
$13
$1
$
$1
Accumulated other comprehensive (income) loss   
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Deferred income tax benefit$(3)$
$(3)$
$
$
$
$
$(4)$
$(3)$
$
$
$
$
Prior service credit(1)






(1)






Net actuarial loss10

9





12

9





Net amounts recognized in accumulated other comprehensive loss $6
$
$6
$
$
$
$
$
$7
$
$6
$
$
$
$
$
Amounts to be recognized in net periodic pension expense in the next year  
Unrecognized net actuarial loss$7
$
$2
$1
$1
$
$
$
$8
$
$2
$1
$1
$
$
$
Unrecognized prior service credit$(2)$
$
$
$
$
$
$
$(2)$
$
$
$
$
$
$
(a)    Included in Other within Current Liabilities on the Consolidated Balance Sheets.
(b)    Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.



(b)FINANCIAL STATEMENTSIncluded in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.EMPLOYEE BENEFIT PLANS

231

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets
December 31, 2017December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Projected benefit obligation $331
$14
$116
$35
$47
$4
$3
$4
$304
$14
$106
$31
$43
$3
$3
$3
Accumulated benefit obligation 331
14
116
35
47
4
3
4
304
14
106
31
43
3
3
3
December 31, 2016December 31, 2017
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Projected benefit obligation $332
$14
$114
$33
$46
$4
$3
$4
$331
$14
$116
$35
$47
$4
$3
$4
Accumulated benefit obligation 332
14
114
33
46
4
3
4
331
14
116
35
47
4
3
4
Assumptions Used for Pension Benefits Accounting
The discount rate used to determine the current year pension obligation and following year’s pension expense is based on a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected.
The average remaining service period of active covered employees is 10 years for Duke Energy, 13 years for Progress Energy, 11 years for Duke Energy and Duke Energy Progress, 14 years for Progress Energy, 15 years for Duke Energy Florida, eight years for Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana and nine years for Piedmont. The following tables present the assumptions used for pension benefit accounting.
 December 31, December 31,
 2017 2016
 2015
 2018 2017 2016
Benefit Obligations
     
   
  ��
     
     
   
Discount rate  

 3.60% 4.10% 4.40% 

 4.30%   3.60% 4.10%
Salary increase  3.50%4.00% 4.40% 4.40% 3.50%4.00% 3.50%4.00% 4.40%
Net Periodic Benefit Cost
     
   
   
     
     
   
Discount rate    4.10% 4.40% 4.10%   3.60%   4.10% 4.40%
Salary increase
   4.40% 4.40% 4.40% 3.50%4.00%   4.40% 4.40%
  Piedmont
   Two Months Ended Years Ended October 31,
   December 31, 2016 2016 2015
Benefit Obligations         
Discount rate   4.10% 3.80% 3.85%
Net Periodic Benefit Cost     
   
Discount rate   3.80% 3.85% 3.69%

232

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

  Piedmont
   Two Months Ended Year Ended
   December 31, 2016 October 31, 2016
Benefit Obligations      
Discount rate   4.10% 3.80%
Net Periodic Benefit Cost     
Discount rate   3.80% 3.85%
Expected Benefit Payments
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Years ending December 31,       
2018$23
$2
$8
$3
$3
$
$
$
201921
1
8
2
3



$22
$2
$8
$3
$3
$
$
$
202021
1
8
2
3



21
1
8
2
3



202122
1
8
2
3



23
1
8
2
3



202225
1
8
2
3



25
1
8
2
3



2023-2027117
6
36
11
15
1
1
2
202325
3
7
2
3



2024-2028125
10
37
11
15
1
1
2



FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS


OTHER POST-RETIREMENT BENEFIT PLANS
Duke Energy provides, and the Subsidiary Registrants participate in, some health care and life insurance benefits for retired employees on a contributory and non-contributory basis. Employees are eligible for these benefits if they have met age and service requirements at retirement, as defined in the plans. The health care benefits include medical, dental and prescription drug coverage and are subject to certain limitations, such as deductibles and copayments.
Duke Energy did not make any pre-funding contributions to its other post-retirement benefit plans during the years ended December 31, 2018, 2017 2016 or 2015.2016.
Components of Net Periodic Other Post-Retirement Benefit Costs
Year Ended December 31, 2017Year Ended December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Service cost $4
 $1
 $
 $
 $
 $
 $
 $1
$6
 $1
 $1
 $
 $1
 $1
 $1
 $1
Interest cost on accumulated post-retirement benefit obligation 34
 8
 13
 7
 6
 1
 3
 1
28
 7
 12
 6
 6
 1
 3
 1
Expected return on plan assets (14) (8) 
 
 
 
 (1) (2)(13) (8) 
 
 
 
 
 (2)
Amortization of actuarial loss (gain) 10
 (2) 21
 12
 9
 (2) (1) 1
Amortization of actuarial loss6
 3
 1
 1
 
 
 4
 
Amortization of prior service credit (115) (10) (84) (54) (30) 
 (1) 
(19) (5) (8) (1) (7) (1) (1) (2)
Curtailment credit (c)
$(30) $(4) $(16) $
 $(16) $(2) $(2) $
Net periodic post-retirement benefit costs(a)(b)
$(111) $(15) $(66) $(35) $(31) $(3) $(2) $1
$8
 $(2) $6
 $6
 $
 $1
 $7
 $(2)
  Year Ended December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Service cost  $4
 $1
 $
 $
 $
 $
 $
 $1
Interest cost on accumulated post-retirement benefit obligation  34
 8
 13
 7
 6
 1
 3
 1
Expected return on plan assets  (14) (8) 
 
 
 
 (1) (2)
Amortization of actuarial loss (gain)  10
 (2) 21
 12
 9
 (2) (1) 1
Amortization of prior service credit  (115) (10) (84) (54) (30) 
 (1) 
Curtailment credit (c)
(30) (4) (16) 
 (16) (2) (2) 
Net periodic post-retirement benefit costs(a)(b)
$(111) $(15) $(66) $(35) $(31) $(3) $(2) $1
  Year Ended December 31, 2016
   Duke
   Duke
 Duke
 Duke
 Duke
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Service cost  $3
 $1
 $1
 $
 $1
 $
 $
Interest cost on accumulated post-retirement benefit obligation  35
 8
 15
 8
 7
 1
 4
Expected return on plan assets  (12) (8) 
 
 
 
 (1)
Amortization of actuarial loss (gain)  6
 (3) 22
 13
 9
 (2) (1)
Amortization of prior service credit  (141) (14) (103) (68) (35) 
 (1)
Net periodic post-retirement benefit costs(a)(b)
$(109) $(16) $(65) $(47) $(18) $(1) $1

233

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

  Year Ended December 31, 2015
   Duke
   Duke
 Duke
 Duke
 Duke
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)  Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Service cost  $6
 $1
 $1
 $1
 $1
 $
 $1
Interest cost on accumulated post-retirement benefit obligation  36
 9
 15
 8
 7
 2
 4
Expected return on plan assets  (13) (8) 
 
 
 (1) (1)
Amortization of actuarial loss (gain)  16
 (2) 28
 18
 10
 (2) (2)
Amortization of prior service credit  (140) (14) (102) (68) (35) 
 
Net periodic post-retirement benefit costs(a)(b)
$(95) $(14) $(58) $(41) $(17) $(1) $2
(a)Duke Energy amounts exclude $7 million, $8$7 million and $10$8 million for the years ended December 2018, 2017 2016 and 2015,2016, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006.
(b)Duke Energy Ohio amounts exclude $2 million, $2 million and $3$2 million for the years ended December 2018, 2017 2016 and 2015,2016, respectively, of regulatory asset amortization resulting from purchase accounting adjustments associated with Duke Energy's merger with Cinergy in April 2006.
(c)Curtailment credit resulted from a reduction in average future service of plan participants due to a plan amendment.

  Piedmont
 Years Ended October 31,
(in millions)  
20162015
Service cost  $1
$1
Interest cost on projected benefit obligation  1
2
Expected return on plan assets  (2)(2)
Amortization of actuarial loss  1

Net periodic pension costs$1
$1


234

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

  Piedmont
 Year Ended
(in millions)  
October 31, 2016
Service cost  $1
Interest cost on projected benefit obligation  1
Expected return on plan assets  (2)
Amortization of actuarial loss  1
Net periodic pension costs$1
Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities
Year Ended December 31, 2017Year Ended December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Regulatory assets, net increase (decrease)$71
 $
 $81
 $42
 $39
 $
 $(5) $(11)$137
 $
 $133
 $84
 $49
 $
 $(5) $4
Regulatory liabilities, net increase (decrease) $(27) $(2) $
 $
 $
 $(3) $(7) $
$154
 $(6) $149
 $93
 $56
 $2
 $3
 $
Accumulated other comprehensive (income) loss                               
Deferred income tax benefit $(1) $
 $
 $
 $
 $
 $
 $
$(1) $
 $
 $
 $
 $
 $
 $
Amortization of prior year prior service credit 3
 
 
 
 
 
 
 
Amortization of prior year actuarial gain 1
 
 
 
 
 
 
 
Net amount recognized in accumulated other comprehensive income $2
 $
 $
 $
 $
 $
 $
 $
$
 $
 $
 $
 $
 $
 $
 $
Year Ended December 31, 2016Year Ended December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Regulatory assets, net increase (decrease)$53
 $
 $47
 $38
 $9
 $
 $(6)$71
 $
 $81
 $42
 $39
 $
 $(5) $(11)
Regulatory liabilities, net increase (decrease) $(114) $(22) $(51) $(25) $(26) $(2) $(12)$(27) $(2) $
 $
 $
 $(3) $(7) $
Accumulated other comprehensive (income) loss                             
Deferred income tax benefit $(2) $
 $
 $
 $
 $
 $
$(1) $
 $
 $
 $
 $
 $
 $
Actuarial losses arising during the year 3
 
 
 
 
 
 
Amortization of prior year prior service credit 1
 
 1
 
 
 
 
3
 
 
 
 
 
 
 
Net amount recognized in accumulated other comprehensive income $2
 $
 $1
 $
 $
 $
 $
$2
 $
 $
 $
 $
 $
 $
 $
Piedmont's regulatory assets net decreased $1 million for the two months ended December 31, 2016, and increased $2 million and $1 million for the yearsyear ended October 31, 2016, and 2015, respectively.2016.



235

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Reconciliation of Funded Status to Accrued Other Post-Retirement Benefit Costs
Year Ended December 31, 2017Year Ended December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Change in Projected Benefit Obligation
  
                      
                    
Accumulated post-retirement benefit obligation at prior measurement date $868
 $201
 $357
 $191
 $164
 $32
 $83
 $39
$813
 $189
 $342
 $184
 $156
 $30
 $78
 $32
Service cost 4
 1
 
 
 
 
 
 1
6
 1
 1
 
 1
 1
 1
 1
Interest cost 34
 8
 13
 7
 6
 1
 3
 1
28
 7
 12
 6
 6
 1
 3
 1
Plan participants' contributions 17
 3
 6
 3
 3
 1
 2
 
18
 3
 6
 4
 3
 1
 2
 
Actuarial (gains) losses4
 (3) 4
 1
 3
 
 3
 1
Actuarial gains(51) (8) (23) (9) (13) (2) (5) (1)
Transfers
 2
 (1) 
 (1) 1
 
 

 
 
 
 
 
 
 (1)
Plan amendments (28) (5) (3) (1) (2) (2) (2) (9)
Benefits paid (86) (18) (34) (17) (17) (3) (11) (1)(86) (18) (35) (19) (16) (2) (12) (2)
Accumulated post-retirement benefit obligation at measurement date $813
 $189
 $342
 $184
 $156
 $30
 $78
 $32
$728
 $174
 $303
 $166
 $137
 $29
 $67
 $30
Change in Fair Value of Plan Assets
  
   
   
   
   
   
   
   
  
   
   
   
   
   
   
   
Plan assets at prior measurement date
$244
 $137
 $1
 $
 $
 $7
 $22
 $29
$225
 $133
 $
 $
 $
 $7
 $11
 $31
Actual return on plan assets 25
 15
 1
 
 
 2
 1
 3
(8) (5) 
 
 
 
 
 (1)
Benefits paid (86) (18) (34) (17) (17) (3) (11) (1)(86) (18) (35) (19) (16) (2) (12) (2)
Employer contributions (reimbursements)25
 (4) 26
 14
 14
 
 (3) 
Employer contributions46
 2
 29
 15
 13
 2
 4
 1
Plan participants' contributions 17
 3
 6

3

3

1

2
 
18
 3
 6

4

3

1

2
 
Plan assets at measurement date $225
 $133
 $
 $
 $
 $7
 $11
 $31
$195
 $115
 $
 $
 $
 $8
 $5
 $29
Funded status of plan$(533) $(59) $(303) $(166) $(137) $(21) $(62) $(1)
Year Ended December 31, 2016Year Ended December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Change in Projected Benefit Obligation
                                          
Accumulated post-retirement benefit obligation at prior measurement date $828
 $200
 $354
 $188
 $164
 $35
 $87
$868
 $201
 $357
 $191
 $164
 $32
 $83
 $39
Obligation assumed from acquisition39
 
 
 
 
 
 
Service cost 3
 1
 1
 
 1
 
 
4
 1
 
 
 
 
 
 1
Interest cost 35
 8
 15
 8
 7
 1
 4
34
 8
 13
 7
 6
 1
 3
 1
Plan participants' contributions 19
 3
 7
 4
 3
 1
 2
17
 3
 6
 3
 3
 1
 2
 
Actuarial (gains) losses33
 5
 16
 8
 8
 
 3
Actuarial losses (gains)4
 (3) 4
 1
 3
 
 3
 1
Transfers
 1
 
 
 
 
 

 2
 (1) 
 (1) 1
 
 
Plan amendments (1) 
 
 
 
 (1) 
(28) (5) (3) (1) (2) (2) (2) (9)
Benefits paid (88) (17) (36) (17) (19) (4) (13)(86) (18) (34) (17) (17) (3) (11) (1)
Accumulated post-retirement benefit obligation at measurement date $868
 $201
 $357
 $191
 $164
 $32
 $83
$813
 $189
 $342
 $184
 $156
 $30
 $78
 $32
Change in Fair Value of Plan Assets
  
   
   
   
   
   
   
  
   
   
   
   
   
   
  
Plan assets at prior measurement date $208
 $134
 $
 $
 $1
 $8
 $19
$244
 $137
 $1
 $
 $
 $7
 $22
 $29
Assets received from acquisition29
 
 
 
 
 
 
Actual return on plan assets 14
 8
 1
 
 
 1
 2
25
 15
 1
 
 
 2
 1
 3
Benefits paid (88) (17) (36) (17) (19) (4) (13)(86) (18) (34) (17) (17) (3) (11) (1)
Employer contributions 62
 9
 29
 13
 15
 1
 12
Employer contributions (reimbursements)25
 (4) 26
 14
 14
 
 (3) 
Plan participants' contributions 19
 3
 7
 4
 3
 1
 2
17
 3
 6
 3
 3
 1
 2
 
Plan assets at measurement date $244
 $137
 $1
 $
 $
 $7
 $22
$225
 $133
 $
 $
 $
 $7
 $11
 $31
Funded status of plan$(588) $(56) $(342) $(184) $(156) $(23) $(67) $(1)

236

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)


  Piedmont
 Two Months Ended Years Ended
(in millions)  December 31, 2016  October 31, 2016
Change in Projected Benefit Obligation  
    
Accumulated post-retirement benefit obligation at prior measurement date  $39
 $38
Service cost  
 1
Interest cost  
 1
Actuarial gain
 2
Benefits paid  
 (3)
Accumulated post-retirement benefit obligation at measurement date  $39
 $39
Change in Fair Value of Plan Assets  
  
   
Plan assets at prior measurement date  $29
 $28
Employer contributions
 3
Actual return on plan assets  
 1
Benefits paid  
 (3)
Plan assets at measurement date  $29
 $29
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS

237

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Amounts Recognized in the Consolidated Balance Sheets
December 31, 2017December 31, 2018
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current post-retirement liability(a)
$36
 $
 $29
 $15
 $14
 $2
 $
 $
$8
 $
 $5
 $3
 $2
 $2
 $
 $
Noncurrent post-retirement liability(b)
552
 56
 313
 169
 142
 21
 67
 1
525
 59
 298
 163
 135
 19
 62
 1
Total accrued post-retirement liability $588
 $56
 $342
 $184
 $156
 $23
 $67
 $1
$533
 $59
 $303
 $166
 $137
 $21
 $62
 $1
Regulatory assets $125
 $
 $129
 $80
 $49
 $
 $46
 $(4)$262
 $
 $262
 $164
 $98
 $
 $41
 $
Regulatory liabilities $147
 $44
 $
 $
 $
 $16
 $64
 $
$301
 $38
 $149
 $93
 $56
 $18
 $67
 $
Accumulated other comprehensive (income) loss   
   
   
   
   
   
   
   
  
   
   
   
   
   
   
   
Deferred income tax expense$4
 $
 $
 $
 $
 $
 $
 $
$3
 $
 $
 $
 $
 $
 $
 $
Prior service credit (2) 
 
 
 
 
 
 
(2) 
 
 
 
 
 
 
Net actuarial gain (10) 
 
 
 
 
 
 
(9) 
 
 
 
 
 
 
Net amounts recognized in accumulated other comprehensive income $(8) $
 $
 $
 $
 $
 $
 $
$(8) $
 $
 $
 $
 $
 $
 $
Amounts to be recognized in net periodic pension expense in the next year   
   
   
   
   
   
   
   
  
   
   
   
   
   
   
   
Unrecognized net actuarial loss $5
 $3
 $1
 $
 $1
 $
 $
 $
$4
 $2
 $1
 $
 $
 $
 $
 $
Unrecognized prior service credit(19) (5) (7) (1) (6) (1) (1) (2)(19) (5) (7) (1) (6) (1) (1) (2)
December 31, 2016December 31, 2017
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Current post-retirement liability(a)
$38
 $
 $31
 $17
 $15
 $2
 $
 $
$36
 $
 $29
 $15
 $14
 $2
 $
 $
Noncurrent post-retirement liability(b)
586
 64
 325
 174
 149
 23
 63
 10
552
 56
 313
 169
 142
 21
 67
 1
Total accrued post-retirement liability $624
 $64
 $356
 $191
 $164
 $25
 $63
 $10
$588
 $56
 $342
 $184
 $156
 $23
 $67
 $1
Regulatory assets $54
 $
 $48
 $38
 $10
 $
 $51
 $7
$125
 $
 $129
 $80
 $49
 $
 $46
 $(4)
Regulatory liabilities $174
 $46
 $
 $
 $
 $19
 $71
 $
$147
 $44
 $
 $
 $
 $16
 $64
 $
Accumulated other comprehensive (income) loss   
   
   
   
   
   
   
   
  
   
   
   
   
   
   
   
Deferred income tax expense$5
 $
 $
 $
 $
 $
 $
 $
$4
 $
 $
 $
 $
 $
 $
 $
Prior service credit (5) 
 
 
 
 
 
 
(2) 
 
 
 
 
 
 
Net actuarial gain (10) 
 
 
 
 
 
 
(10) 
 
 
 
 
 
 
Net amounts recognized in accumulated other comprehensive income $(10) $
 $
 $
 $
 $
 $
 $
$(8) $
 $
 $
 $
 $
 $
 $
Amounts to be recognized in net periodic pension expense in the next year                              
Unrecognized net actuarial loss (gain)$10
 $(2) $21
 $12
 $9
 $(2) $(6) $
$5
 $3
 $1
 $
 $1
 $
 $
 $
Unrecognized prior service credit(115) (10) (85) (55) (30) 
 (1) 
(19) (5) (7) (1) (6) (1) (1) (2)
(a)Included in Other within Current Liabilities on the Consolidated Balance Sheets. 
(b)Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.



238

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Assumptions Used for Other Post-Retirement Benefits Accounting
The discount rate used to determine the current year other post-retirement benefits obligation and following year’s other post-retirement benefits expense is based on a bond selection-settlement portfolio approach. This approach develops a discount rate by selecting a portfolio of high quality corporate bonds that generate sufficient cash flow to provide for projected benefit payments of the plan. The selected bond portfolio is derived from a universe of non-callable corporate bonds rated Aa quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan’s projected benefit payments discounted at this rate with the market value of the bonds selected. The average remaining service period of active covered employees is nine years for Duke Energy, eight years for Duke Energy Carolinas, seven years for Duke Energy Florida, Duke Energy Ohio, and Piedmont, and six years for Progress Energy, Duke Energy Progress, and Duke Energy Indiana.
The following tables present the assumptions used for other post-retirement benefits accounting.
 December 31, December 31,
 2017
 2016
 2015
 2018
 2017
 2016
Benefit Obligations
   
   
      
   
   
Discount rate  3.60% 4.10% 4.40% 4.30% 3.60% 4.10%
Net Periodic Benefit Cost
   
   
      
   
   
Discount rate  4.10% 4.40% 4.10% 3.60% 4.10% 4.40%
Expected long-term rate of return on plan assets  6.50% 6.50% 6.50% 6.50% 6.50% 6.50%
Assumed tax rate  35% 35% 35% 35% 35% 35%
 Piedmont Piedmont
 Two Months Ended Years Ended October 31, Two Months Ended Year Ended
 December 31, 2016 2016 2015 December 31, 2016 October 31, 2016
Benefit Obligations               
Discount rate  4.10% 3.80% 4.38% 4.10% 3.80%
Net Periodic Benefit Cost     
   
     
Discount rate  3.80% 4.38% 4.03% 3.80% 4.38%
Expected long-term rate of return on plan assets  6.75% 7.25% 7.50% 6.75% 7.25%
Assumed Health Care Cost Trend Rate
December 31,December 31,
2017
 2016
2018
 2017
Health care cost trend rate assumed for next year 7.00% 7.00%6.50% 7.00%
Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.75% 4.75%4.75% 4.75%
Year that rate reaches ultimate trend 2024
 2023
2024
 2024
Sensitivity to Changes in Assumed Health Care Cost Trend Rates
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
1-Percentage Point Increase
        
           
   
Effect on total service and interest costs $1
$
$1
$1
$
$
$
$
$1
$
$1
$1
$
$
$
$
Effect on post-retirement benefit obligation 27
6
11
6
5
1
3
1
22
5
9
5
4
1
2
1
1-Percentage Point Decrease  
Effect on total service and interest costs (1)






(1)
(1)(1)



Effect on post-retirement benefit obligation (24)(6)(10)(5)(5)(1)(2)(1)(20)(5)(8)(5)(4)(1)(2)(1)



239

PART II
FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Expected Benefit Payments
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions) Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Years ending December 31,    
       
   
2018$78
$17
$30
$16
$14
$3
$9
$2
201976
17
29
15
14
3
9
2
$81
$19
$30
$16
$14
$3
$9
$2
202073
17
29
15
14
3
8
2
75
18
29
15
13
3
8
2
202171
17
28
15
13
3
7
3
71
18
28
15
13
3
7
2
202268
17
27
14
13
3
7
3
68
17
27
14
12
3
7
3
2023 – 2027290
70
117
63
54
12
29
13
202364
16
26
14
12
3
6
3
2024-2028266
64
109
59
50
11
26
12
PLAN ASSETS
Description and Allocations
Duke Energy Master Retirement Trust
Assets for both the qualified pension and other post-retirement benefits are maintained in the Duke Energy Master Retirement Trust. Qualified pension and other post-retirement assets related to Piedmont were transferred into the Duke Energy Master Retirement Trust during 2017. Approximately 98 percent of the Duke Energy Master Retirement Trust assets were allocated to qualified pension plans and approximately 2 percent were allocated to other post-retirement plans (comprised of 401(h) accounts), as of December 31, 2017,2018, and 2016.2017. The investment objective of the Duke Energy Master Retirement Trust is to achieve reasonable returns,invest in a diverse portfolio of assets that is expected to generate positive surplus return over time (i.e. asset growth greater than liability growth) subject to a prudent level of portfolio risk, for the purpose of enhancing the security of benefits for plan participants.
As of December 31, 2017,2018, Duke Energy assumes pension and other post-retirement plan assets will generate a long-term rate of return of 6.506.85 percent. The expected long-term rate of return was developed using a weighted average calculation of expected returns based primarily on future expected returns across asset classes considering the use of active asset managers, where applicable. The asset allocation targets were set after considering the investment objective and the risk profile. Equity securities are held for their higher expected returns. Debt securities are primarily held to hedge the qualified pension plan liability. HedgeReal assets, return seeking fixed income, hedge funds real estate and other global securities are held for diversification. Investments within asset classes are diversified to achieve broad market participation and reduce the impact of individual managers or investments.
In 2013, Duke Energy adopted a de-risking investment strategyEffective January 1, 2019, the target asset allocation for the Duke Energy Retirement Master Retirement Trust. AsTrust is 58 percent liability hedging assets and 42 percent return-seeking assets. Duke Energy periodically reviews its asset allocation targets, and over time, as the funded status of the pensionbenefit plans increase, the targeted allocationlevel of asset risk relative to fixed-income assetsplan liabilities may be increasedreduced to better manage Duke Energy’s pension liabilityEnergy's benefit plan liabilities and reduce funded status volatility. Duke Energy regularly reviews its actual asset allocation and periodically rebalances its investments to the targeted allocation when considered appropriate.
The Duke Energy Master Retirement Trust is authorized to engage in the lending of certain plan assets. Securities lending is an investment management enhancement that utilizes certain existing securities of the Duke Energy Master Retirement Trust to earn additional income. Securities lending involves the loaning of securities to approved parties. In return for the loaned securities, the Duke Energy Master Retirement Trust receives collateral in the form of cash and securities as a safeguard against possible default of any borrower on the return of the loan under terms that permit the Duke Energy Master Retirement Trust to sell the securities. The Duke Energy Master Retirement Trust mitigates credit risk associated with securities lending arrangements by monitoring the fair value of the securities loaned, with additional collateral obtained or refunded as necessary. The fair value of securities on loan was approximately $195$154 million and $156$195 million at December 31, 2017,2018, and 2016,2017, respectively. Cash and securities obtained as collateral exceeded the fair value of the securities loaned at December 31, 2017,2018, and 2016,2017, respectively. Securities lending income earned by the Duke Energy Master Retirement Trust was immaterial for the years ended December 31, 2018, 2017 2016 and 2015,2016, respectively.
Qualified pension and other post-retirement benefits for the Subsidiary Registrants are derived from the Duke Energy Master Retirement Trust, as such, each are allocated their proportionate share of the assets discussed below.



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FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table includes the target asset allocations by asset class at December 31, 2017,2018, and the actual asset allocations for the Duke Energy Master Retirement Trust.
   Actual Allocation at   Actual Allocation at
Target
 December 31,Target
 December 31,
Allocation
 2017
 
2016(a)

Allocation
 2018
 2017
U.S. equity securities 10% 11% 11%10% 11% 11%
Non-U.S. equity securities 8% 8% 8%8% 8% 8%
Global equity securities 10% 10% 10%10% 10% 10%
Global private equity securities 3% 2% 2%3% 2% 2%
Debt securities 63% 63% 63%63% 63% 63%
Hedge funds 2% 2% 2%2% 2% 2%
Real estate and cash 2% 2% 2%2% 2% 2%
Other global securities 2% 2% 2%2% 2% 2%
Total 100% 100% 100%100% 100% 100%
(a)
Excludes Piedmont Pension Assets, which had a targeted asset allocation of 60 percent return-seeking and 40 percent liability hedging fixed-income. Actual asset allocations were 61 percent return-seeking and 39 percent liability hedging fixed-income at December 31, 2016.
Other post-retirement assets
Duke Energy's other post-retirement assets are comprised of Voluntary Employees' Beneficiary Association (VEBA)VEBA trusts and 401(h) accounts held within the Duke Energy Master Retirement Trust. Duke Energy's investment objective is to achieve sufficient returns, subject to a prudent level of portfolio risk, for the purpose of promoting the security of plan benefits for participants.  
The following table presents target and actual asset allocations for the VEBA trusts at December 31, 2017.2018.
   Actual Allocation at   Actual Allocation at
Target
 December 31,Target
 December 31,
Allocation
 2017
 2016
Allocation
 2018
 2017
U.S. equity securities 32% 41% 39%32% 43% 41%
Non-US equity securities6% 8% %
Non-U.S. equity securities6% 8% 8%
Real estate2% 2% 2%2% 2% 2%
Debt securities 45% 36% 37%45% 40% 36%
Cash 15% 13% 22%15% 7% 13%
Total 100% 100% 100%100% 100% 100%
Fair Value Measurements
Duke Energy classifies recurring and non-recurring fair value measurements based on the fair value hierarchy as discussed in Note 16.
Valuation methods of the primary fair value measurements disclosed below are as follows:
Investments in equity securities
Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the reporting period. Principal active markets for equity prices include published exchanges such as NASDAQ and NYSE. Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. Prices have not been adjusted to reflect after-hours market activity. The majority of investments in equity securities are valued using Level 1 measurements. When the price of an institutional commingled fund is unpublished, it is not categorized in the fair value hierarchy, even though the funds are readily available at the fair value.
Investments in corporate debt securities and U.S. government securities
Most debt investments are valued based on a calculation using interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. Most debt valuations are Level 2 measurements. If the market for a particular fixed-income security is relatively inactive or illiquid, the measurement is Level 3. U.S. Treasury debt is typically Level 2.
Investments in short-term investment funds
Investments in short-term investment funds are valued at the net asset value of units held at year end and are readily redeemable at the measurement date. Investments in short-term investment funds with published prices are valued as Level 1. Investments in short-term investment funds with unpublished prices are valued as Level 2.



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FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

Investments in real estate limited partnerships
Investments in real estate limited partnerships are valued by the trustee at each valuation date (monthly). As part of the trustee’s valuation process, properties are externally appraised generally on an annual basis, conducted by reputable, independent appraisal firms, and signed by appraisers that are members of the Appraisal Institute, with the professional designation MAI. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There are three valuation techniques that can be used to value investments in real estate assets: the market, income or cost approach. The appropriateness of each valuation technique depends on the type of asset or business being valued. In addition, the trustee may cause additional appraisals to be performed as warranted by specific asset or market conditions. Property valuations and the salient valuation-sensitive assumptions of each direct investment property are reviewed by the trustee quarterly and values are adjusted if there has been a significant change in circumstances related to the investment property since the last valuation. Value adjustments for interim capital expenditures are only recognized to the extent that the valuation process acknowledges a corresponding increase in fair value. An independent firm is hired to review and approve quarterly direct real estate valuations. Key inputs and assumptions used to determine fair value includes among others, rental revenue and expense amounts and related revenue and expense growth rates, terminal capitalization rates and discount rates. Development investments are valued using cost incurred to date as a primary input until substantive progress is achieved in terms of mitigating construction and leasing risk at which point a discounted cash flow approach is more heavily weighted. Key inputs and assumptions in addition to those noted above used to determine the fair value of development investments include construction costs and the status of construction completion and leasing. Investments in real estate limited partnerships are valued at net asset value of units held at year end and are not readily redeemable at the measurement date. Investments in real estate limited partnerships are not categorized within the fair value hierarchy.
Duke Energy Master Retirement Trust
The following tables provide the fair value measurement amounts for the Duke Energy Master Retirement Trust qualified pension and other post-retirement assets.
December 31, 2017December 31, 2018
Total Fair
       Not
Total Fair
       Not
(in millions) Value
 Level 1
 Level 2
 Level 3
 
Categorized(b)

Value
 Level 1
 Level 2
 Level 3
 
Categorized(b)

Equity securities $2,823
 $1,976
 $
 $
 847
$2,373
 $1,751
 $
 $
 $622
Corporate debt securities 4,694
 
 4,694
 
 
4,054
 
 4,054
 
 
Short-term investment funds 246
 192
 54
 
 
363
 279
 84
 
 
Partnership interests 137
 
 
 
 137
120
 
 
 
 120
Hedge funds 226
 
 
 
 226
226
 
 
 
 226
Real estate limited partnerships 135
 
 
 
 135
144
 
 
 
 144
U.S. government securities 762
 
 762
 
 
961
 
 961
 
 
Guaranteed investment contracts 28
 
 
 28
 
27
 
 
 27
 
Governments bonds – foreign 38
 
 38
 
 
30
 
 30
 
 
Cash 6
 6
 
 
 
28
 28
 
 
 
Government and commercial mortgage backed securities 2
 
 2
 
 
Net pending transactions and other investments 17
 15
 2
 
 
(2) (6) 4
 
 
Total assets(a)
$9,114
 $2,189
 $5,552
 $28

$1,345
$8,324
 $2,052
 $5,133
 $27

$1,112
(a)Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana, and Piedmont were allocated approximately 27 percent, 31 percent, 15 percent, 16 percent, 5 percent, 7 percent, and 4 percent, respectively, of the Duke Energy Master Retirement Trust at December 31, 2018. Accordingly, all amounts included in the table above are allocable to the Subsidiary Registrants using these percentages.
(b)Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy.



FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS


  December 31, 2017
 Total Fair
       Not
(in millions)  Value
 Level 1
 Level 2
 Level 3
 
Categorized(b)

Equity securities  $2,823
 $1,976
 $
 $
 $847
Corporate debt securities  4,694
 
 4,694
 
 
Short-term investment funds  246
 192
 54
 
 
Partnership interests  137
 
 
 
 137
Hedge funds  226
 
 
 
 226
Real estate limited partnerships  135
 
 
 
 135
U.S. government securities  762
 
 762
 
 
Guaranteed investment contracts  28
 
 
 28
 
Governments bonds – foreign  38
 
 38
 
 
Cash  6
 6
 
 
 
Government and commercial mortgage backed securities  2
 
 2
 
 
Net pending transactions and other investments  17
 15
 2
 
 
Total assets(a)
$9,114
 $2,189
 $5,552
 $28
 $1,345
(a)Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana, and Piedmont were allocated approximately 27 percent, 30 percent, 15 percent, 15 percent, 5 percent, 8 percent, and 4 percent, respectively, of the Duke Energy Master Retirement Trust at December 31, 2017. Accordingly, all amounts included in the table above are allocable to the Subsidiary Registrants using these percentages.
(b)Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy.

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

  December 31, 2016
 Total Fair
       Not
(in millions)  Value
 Level 1
 Level 2
 Level 3
 
Categorized(b)

Equity securities  $2,472
 $1,677
 $27
 $9
 759
Corporate debt securities  4,330
 8
 4,322
 
 
Short-term investment funds  476
 211
 265
 
 
Partnership interests  157
 
 
 
 157
Hedge funds  232
 
 
 
 232
Real estate limited partnerships  144
 17
 
 
 127
U.S. government securities  734
 
 734
 
 
Guaranteed investment contracts  29
 
 
 29
 
Governments bonds – foreign  32
 
 32
 
 
Cash  17
 15
 2
 
 
Net pending transactions and other investments  32
 1
 6
 
 25
Total assets(a)
$8,655
 $1,929
 $5,388
 $38
 $1,300
(a)Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio and Duke Energy Indiana were allocated approximately 27 percent, 30 percent, 15 percent, 15 percent, 5 percent and 8 percent, respectively, of the Duke Energy Master Retirement Trust and Piedmont's Pension assets at December 31, 2016.2017. Accordingly, all amounts included in the table above are allocable to the Subsidiary Registrants using these percentages.
(b)Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy.
The following table provides a reconciliation of beginning and ending balances of Duke Energy Master Retirement Trust qualified pension and other post-retirement assets and Piedmont Pension Assets at fair value on a recurring basis where the determination of fair value includes significant unobservable inputs (Level 3).
(in millions) 2017
 2016
2018
 
2017(a)

Balance at January 1 $38
 $31
$28
 $38
Combination of Piedmont Pension Assets
 9
Sales (2) (2)(1) (2)
Total gains (losses) and other, net 1
 
Total gains and other, net
 1
Transfer of Level 3 assets to other classifications(9) 

 (9)
Balance at December 31 $28
 $38
$27
 $28
(a)Balance at January 1 includes $9 million associated with Piedmont pension assets.



FINANCIAL STATEMENTSEMPLOYEE BENEFIT PLANS


Other post-retirement assets
The following tables provide the fair value measurement amounts for VEBA trust assets.
December 31, 2017December 31, 2018
Total Fair
  Total Fair
  
(in millions) Value
 Level 2
Value
 Level 2
Cash and cash equivalents $8
 $8
$3
 $3
Real estate1
 1
1
 1
Equity securities 28
 28
25
 25
Debt securities 21
 21
20
 20
Total assets $58
 $58
$49
 $49
December 31, 2016December 31, 2017
Total Fair
  Total Fair
  
(in millions) Value
 Level 2
Value
 Level 2
Cash and cash equivalents $14
 $14
$8
 $8
Real estate1
 1
1
 1
Equity securities 26
 26
28
 28
Debt securities 25
 25
21
 21
Total assets $66
 $66
$58
 $58
 

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DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

EMPLOYEE SAVINGS PLANS
Retirement Savings Plan
Duke Energy or its affiliates sponsor, and the Subsidiary Registrants participate in, employee savings plans that cover substantially all U.S. employees. Most employees participate in a matching contribution formula where Duke Energy provides a matching contribution generally equal to 100 percent of employee before-tax and Roth 401(k) contributions of up to 6 percent of eligible pay per pay period (5 percent for Piedmont employees).period. Dividends on Duke Energy shares held by the savings plans are charged to retained earnings when declared and shares held in the plans are considered outstanding in the calculation of basic and diluted EPS.
As of January 1, 2014, forFor new and rehired non-union and certain unionized employees (excludes Piedmont employees until 2018 plan year, discussed below) who are not eligible to participate in Duke Energy’s defined benefit plans, an additional employer contribution of 4 percent of eligible pay per pay period, which is subject to a three-year vesting schedule, is provided to the employee’s savings plan account. Certain Piedmont employees whose participation in a prior Piedmont defined benefit plan (that was frozen as of December 31, 2017) are eligible for employer transition credit contributions of 3 to 5 percent of eligible pay per period, for each pay period during the three-year period ending December 31, 2020.
The following table includes pretax employer matching contributions made by Duke Energy and expensed by the Subsidiary Registrants.
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions) Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 
Piedmont(a)

Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 
Piedmont(a)

Years ended December 31,                                             
2018$213
 $68
 $58
 $40
 $19
 $4
 $10
 $12
2017$179
 $61
 $53
 $37
 $16
 $3
 $9
 $7
179
 61
 53
 37
 16
 3
 9
 7
2016169
 57
 50
 35
 15
 3
 8
 
169
 57
 50
 35
 15
 3
 8
 

2015159
 54
 48
 34
 13
 3
 7
 
(a)Piedmont's pretax employer matching contributions were $1 million, $7 million and $7 million during the two months ended December 31, 2016, and for the yearsyear ended October 31, 2016, and 2015, respectively.
Money Purchase Pension Plan
Piedmont sponsorssponsored the MPP plan, which is a defined contribution pension plan that allowsallowed employees to direct investments and assume risk of investment returns. Under the MPP plan, Piedmont annually depositsdeposited a percentage of each participant’s pay into an account of the MPP plan. This contribution equalsequaled 4 percent of the participant’s eligible compensation plus an additional 4 percent of eligible compensation above the Social Security wage base up to the IRS compensation limit. The participant iswas vested in MPP plan after three years of service. No contributions were made to the MPP plan during the two months ended December 31, 2016. Piedmont contributed $2 million to the MPP plan during each of the years ended December 31, 2017, and October 31, 2016 and 2015.2016. Effective December 31, 2017, the MPP Plan was merged into the Retirement Savings Plan and the money purchase plan formula was discontinued. Beginning with the 2018 plan year, the former MPP Plan participants are eligible to receive the additional employer contribution under the Retirement Savings Plan, discussed above.

22.

FINANCIAL STATEMENTSINCOME TAXES


23. INCOME TAXES
Tax Act
On December 22, 2017, President Trump signed the Tax Act into law. Among other provisions, the Tax Act lowerslowered the corporate federal income tax rate from 35 percent to 21 percent, and eliminates bonus depreciation forlimits interest deductions outside of regulated utilities, effective January 1, 2018. The Tax Act also could be amended or subject to technical correction, which could changeutility operations, requires the financial impacts that were recorded at December 31, 2017, or are expected to be recorded in future periods. The FERC and state utility commissions will determine the regulatory treatmentnormalization of the impacts of the Tax Act for the Subsidiary Registrants. The Duke Energy Registrants’ future results of operations, financial condition and cash flows could be adversely impacted by the Tax Act, subsequent amendments or corrections or the actions of the FERC, state utility commissions or credit rating agencies related to the Tax Act. Duke Energy is reviewing orders to address the rate treatment of the Tax Act by each state utility commission in which the Subsidiary Registrants operate. See Note 4 for additional information. Beginning in January 2018, the Subsidiary Registrants will defer the estimated ongoing impacts of the Tax Act that are expected to be returned to customers.
As a result of the Tax Act, Duke Energy revalued its existingexcess deferred tax assets and deferred tax liabilities as of December 31, 2017, to account for the estimated future impact of lower corporate tax rates on these deferred tax amounts. For Duke Energy's regulated operations, where the reduction in the net accumulated deferred income tax (ADIT) liability is expected to be returned to customers in future rates, the net remeasurement has been deferred as a regulatory liability. The regulatory liability for income taxes includes the effect of the reduction of the net deferred tax liability including the tax gross-up of the excess accumulated deferred tax liabilities and the effect of the new tax rate on the previous regulatory asset for income taxes. Excess accumulated deferred income taxes are generally classified as either “protected” or “unprotected”associated with property under IRS rules. Protected excess ADIT, resulting from accumulated tax depreciation of public utility property, are required to utilize the average rate assumption method underas a prerequisite to qualifying for accelerated depreciation and repealed the IRS normalization rulesfederal manufacturing deduction. The Tax Act also repealed the corporate AMT and stipulates a refund of 50 percent of remaining AMT credit carryforwards (to the extent the credits exceed regular tax for determining the timing of the returnyear) for tax years 2018, 2019 and 2020 with all remaining AMT credits to customers. The majority of the excess ADIT is related to protected amounts associated with public utility property. See Note 4 for additional information on the Tax Act's impact to the regulatory asset and liability accounts.

244

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

be refunded in tax year 2021.
On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No.SAB 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act, (SAB 118), which provides guidance on accounting for the Tax Act’s impact. SAB 118 provides a measurement period, which in no case should extend beyond one year from the Tax Act enactment date, during which a company acting in good faith may complete the accounting for the impacts of the Tax Act under ASC Topic 740. In accordance with SAB 118, a company must reflect the income tax effects of the Tax Act in the reporting period in which the accounting under ASC Topic 740 is complete. To the extent that a company’s accounting for certain income tax effects of the Tax Act is incomplete, a company can determine a reasonable estimate for those effects and record a provisional estimate in the financial statements in the first reporting period in which a reasonable estimate can be determined.
As of December 31, 2018, the accounting for the effects of the Tax Act is complete. During the year ended December 31, 2018, Duke Energy recorded a provisional netthe following measurement period adjustments in accordance with SAB 118:
Additional tax benefitexpense of $112$23 million related to the Tax Act incompletion of the period ending December 31, 2017. This netanalysis of Duke Energy’s existing regulatory liability related to deferred taxes;
A $10 million tax benefit primarily consists of a net benefit of $534 million due tofor the remeasurement of deferred tax accounts to reflect the corporate rate reduction impact to netassets and deferred tax balances, a netliabilities primarily related to the guidance on bonus depreciation issued by the IRS in August 2018 affecting the computation of the Company's 2017 Federal income tax liability;
Additional tax expense forof $7 million related to the establishmentportion of athe deferred tax asset as of December 31, 2017, that represents nondeductible long-term incentives under the Tax Act’s limitation on the deductibility of executive compensation; and
During the fourth quarter of 2018, the Company released the $76 million valuation allowance relatedthat it recorded in the first quarter of 2018 as a result of additional guidance published by the IRS that stated refundable AMT credits would not be subject to foreign tax credits of $406 million and a transition tax on previously untaxed earnings and profits on foreign subsidiaries of $10 million. sequestration.
The majority of Duke Energy’s operations are regulated and it is expected that the Subsidiary Registrants will ultimately pass on the savings associated with the amount representing the remeasurement of deferred tax balances related to regulated operations to customers. For Duke Energy's regulated operations, where the reduction is expected to be returned to customers in future rates, the remeasurement has been deferred as a regulatory liability. During 2018, Duke Energy recorded aan additional regulatory liability of $8,313$83 million, representing the revaluation of those deferred tax balances. The Subsidiary Registrants continue to respond to requests from regulators in various jurisdictions to determine the timing and magnitude of savings they will pass on to customers.
The net provisional charge from deferred tax remeasurement and assessment of valuation allowance is based on currently available information and interpretations which are continuing to evolve.In addition, during 2018 Duke Energy continues to analyze additional information and guidance related to certain aspectsreclassified $573 million of the Tax Act, such as limitations on the deductibility of interest and executive compensation, conformity or decoupling by state legislatures in response to the Tax Act, and the final determination of the netAMT credit carryforwards from noncurrent deferred tax liabilities subject to a current federal income tax receivable as the remeasurement. The prospects of supplemental legislation or regulatory processesCompany expects to address questions that arise because of the Tax Act, or evolving technical interpretations of the tax law, may also cause the final impactreceive this amount via a refund from the Tax Act to differ fromIRS in 2019, based on the estimated amounts.expected filing of Duke Energy continues to appropriately refine such amounts withinEnergy's 2018 income tax return in the measurement period allowed by SAB 118, which will be completed no later than the fourthsecond quarter of 2018.2019.



FINANCIAL STATEMENTSINCOME TAXES


Income Tax Expense
Components of Income Tax Expense
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Current income taxes   
Federal$(247)$221
$(436)$(95)$(188)$(37)$128
$(90)$(647)$(8)$(135)$(71)$(49)$20
$29
$67
State4
20
(5)2
(11)2
21
(3)(11)6
(5)(5)(10)(1)3
1
Foreign3







3







Total current income taxes(240)241
(441)(93)(199)(35)149
(93)(655)(2)(140)(76)(59)19
32
68
Deferred income taxes      
Federal1,344
381
664
378
194
99
138
147
1,064
299
341
256
115
21
74
(36)
State102
35
44
10
51
(4)14
8
49
11
20
(17)45
3
22
5
Total deferred income taxes(a) (b)
1,446
416
708
388
245
95
152
155
Total deferred income taxes(a)(b)
1,113
310
361
239
160
24
96
(31)
Investment tax credit amortization(10)(5)(3)(3)
(1)

(10)(5)(3)(3)



Income tax expense from continuing operations1,196
652
264
292
46
59
301
62
448
303
218
160
101
43
128
37
Tax benefit from discontinued operations(6)






(26)






Total income tax expense included in Consolidated Statements of Operations$1,190
$652
$264
$292
$46
$59
$301
$62
$422
$303
$218
$160
$101
$43
$128
$37
(a)Includes benefits of NOL carryforwards and tax credit carryforwards of $22 million at Duke Energy Carolinas, $293 million at Progress Energy, $59 million at Duke Energy Progress, $219 million at Duke Energy Florida, $17 million at Duke Energy Ohio, $21 million at Duke Energy Indiana and $39 million at Piedmont. In addition, total deferred income taxes includes utilization of NOL carryforwards and tax credit carryforwards of $18 million at Duke Energy.
(b)For the year ended December 31, 2018, the Company has revised the December 31, 2017, estimates of the income tax effects of the Tax Act, in accordance with SAB 118. See the Statutory Rate Reconciliation section below for additional information on the Tax Act's impact on income tax expense.
 Year Ended December 31, 2017 
  Duke
 Duke
Duke
Duke
Duke
 
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Current income taxes        
Federal$(247)$221
$(436)$(95)$(188)$(37)$128
$(90)
State4
20
(5)2
(11)2
21
(3)
Foreign3







Total current income taxes(240)241
(441)(93)(199)(35)149
(93)
Deferred income taxes        
Federal1,344
381
664
378
194
99
138
147
State102
35
44
10
51
(4)14
8
Total deferred income taxes(a)(b)
1,446
416
708
388
245
95
152
155
Investment tax credit amortization(10)(5)(3)(3)
(1)

Income tax expense from continuing operations1,196
652
264
292
46
59
301
62
Tax benefit from discontinued operations(6)






Total income tax expense included in Consolidated Statements of Operations$1,190
$652
$264
$292
$46
$59
$301
$62
(a)Includes utilization of NOL (Net operating loss) carryforwards and tax credit carryforwards of $428 million at Duke Energy, $74 million at Progress Energy, $36 million at Duke Energy Florida, $17 million at Duke Energy Ohio, $42 million at Duke Energy Indiana and $79 million at Piedmont. In addition, the total deferred income taxes Includesincludes benefits of NOL carryforwards and tax credit carryforwards of $10 million at Duke Energy Carolinas and $1 million at Duke Energy Progress.
(b)As a result of the Tax Act, Duke Energy's deferred tax assets and liabilities were revalued as of December 31, 2017. See the Statutory Rate Reconciliation section below for additional information on the Tax Act's impact on income tax expense.



245

PART II
FINANCIAL STATEMENTSINCOME TAXES
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Year Ended December 31, 2016
  Duke
 Duke
Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Current income taxes       
Federal$
$139
$15
$(59)$76
$(7)$7
State(15)25
(19)(25)22
(13)6
Foreign2






Total current income taxes(13)164
(4)(84)98
(20)13
Deferred income taxes       
Federal1,064
430
486
350
199
88
202
State117
45
50
40
25
11
11
Total deferred income taxes(a)
1,181
475
536
390
224
99
213
Investment tax credit amortization(12)(5)(5)(5)
(1)(1)
Income tax expense from continuing operations1,156
634
527
301
322
78
225
Tax (benefit) expense from discontinued operations(30)
1


(36)
Total income tax expense included in Consolidated Statements of Operations$1,126
$634
$528
$301
$322
$42
$225
(a)Includes benefits of NOL carryforwards and utilization of NOL and tax credit carryforwards of $648 million at Duke Energy, $4 million at Duke Energy Carolinas, $190 million at Progress Energy, $60 million at Duke Energy Progress, $49 million at Duke Energy Florida, $26 million at Duke Energy Ohio and $58 million at Duke Energy Indiana.
 Year Ended December 31, 2015
  Duke
 Duke
Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Current income taxes       
Federal$
$216
$(193)$(56)$1
$(18)$(86)
State(12)14
1
(4)(7)(1)(12)
Foreign4






Total current income taxes(8)230
(192)(60)(6)(19)(98)
Deferred income taxes       
Federal1,097
345
694
334
290
96
245
State181
57
27
27
58
5
17
Total deferred income taxes(a)
1,278
402
721
361
348
101
262
Investment tax credit amortization(14)(5)(7)(7)
(1)(1)
Income tax expense from continuing operations1,256
627
522
294
342
81
163
Tax expense (benefit) from discontinued operations89

(1)

22

Total income tax expense included in Consolidated Statements of Operations$1,345
$627
$521
$294
$342
$103
$163
(a)Includes utilization of NOL carryforwards and tax credit carryforwards of $264 million at Duke Energy, $15 million at Duke Energy Carolinas, $119 million at Progress Energy, $21 million at Duke Energy Progress, $84 million at Duke Energy Florida, $3 million at Duke Energy Ohio and $45 million at Duke Energy Indiana.

246

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

PiedmontPiedmont
Two Months Ended
Years Ended October 31,Two Months EndedYear Ended October 31,
(in millions)
December 31, 201620162015December 31, 20162016
Current income taxes  
Federal$4
$27
$(1)$4
$27
State(2)12
1
(2)12
Total current income taxes2
39

2
39
Deferred income taxes  
Federal24
79
78
24
79
State6
6
12
6
6
Total deferred income taxes(b)(a)
30
85
90
30
85
Total income tax expense from continuing operations included in Consolidated Statements of Operations$32
$124
$90
$32
$124
(a)Includes benefits of NOL and tax carryforwards of $17 million and $91 million for the two months ended December 31, 2016, and the year ended October 31, 2016, respectively.
(b)Includes benefits and utilization of NOL carryforwards of $46 million for the year ended October 31, 2015.
Duke Energy Income from Continuing Operations before Income Taxes
Years Ended December 31,Years Ended December 31,
(in millions)2017 2016 20152018 2017 2016
Domestic(a)
$4,207
 $3,689
 $3,831
$3,018
 $4,207
 $3,689
Foreign59
 45
 79
55
 59
 45
Income from continuing operations before income taxes$4,266
 $3,734
 $3,910
$3,073
 $4,266
 $3,734
(a)Includes a $16 million expense in 2017 related to the Tax Act impact on equity earnings included within Equity in earnings (losses) of unconsolidated affiliates on the Consolidated Statement of Operations.
Taxes on Foreign Earnings
In February 2016, Duke Energy announced it had initiated a process to divest the International Disposal Group and, accordingly, no longer intended to indefinitely reinvest post-2014 undistributed foreign earnings. This change in the company's intent, combined with the extension of bonus depreciation by Congress in late 2015, allowed Duke Energy to more efficiently utilize foreign tax credits and reduce U.S. deferred tax liabilities associated with the historical unremitted foreign earnings by approximately $95 million during the year ended December 31, 2016.



FINANCIAL STATEMENTSINCOME TAXES


Due to the classification of the International Disposal Group as discontinued operations beginning in the fourth quarter of 2016, income tax amounts related to the International Disposal Group's foreign earnings are presented within Income (Loss) Income From Discontinued Operations, net of tax on the Consolidated Statements of Operations. In December 2016, Duke Energy closed on the sale of the International Disposal Group in two separate transactions to execute the divestiture. See Note 2 for additional information on the sale.
Statutory Rate Reconciliation
The following tables present a reconciliation of income tax expense at the U.S. federal statutory tax rate to the actual tax expense from continuing operations.
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Income tax expense, computed at the statutory rate of 35 percent$1,493
$653
$536
$353
$265
$88
$229
$70
Income tax expense, computed at the statutory rate of 21 percent$645
$288
$263
$174
$137
$46
$109
$35
State income tax, net of federal income tax effect69
36
25
8
26
(1)23
3
30
14
13
(17)28
2
20
4
Amortization of excess deferred income tax(61)
(55)(1)(54)(3)(2)
AFUDC equity income(81)(37)(32)(17)(16)(4)(8)
(42)(15)(22)(12)(10)(2)(2)
AFUDC equity depreciation31
18
9
5
4
1
4

Renewable energy production tax credits(132)






(129)






Other tax credits(28)(7)(13)(5)(8)(1)(1)(3)
Tax Act(a)
(112)15
(246)(40)(226)(23)55
(12)20
1
25
19

2


Tax true-up(52)(24)(19)(13)(7)(5)(6)
Other items, net11
9

1
4
4
8
1
(18)4
(2)(3)4
(2)
1
Income tax expense from continuing operations$1,196
$652
$264
$292
$46
$59
$301
$62
$448
$303
$218
$160
$101
$43
$128
$37
Effective tax rate28.0%34.9%17.2%29.0%6.1%23.4%46.0%30.8%14.6%22.1%17.4%19.3%15.4%19.6%24.6%22.3%

(a)For the year ended December 31, 2018, the Company revised the December 31, 2017 estimates of the income tax effects of the Tax Act, in accordance with SAB 118. Amounts primarily include but are not limited to items that are excluded for ratemaking purposes related certain wholesale fixed rate contracts, remeasurement of nonregulated net deferred tax liabilities, Federal net operating losses, and valuation allowance on foreign tax credits.
247

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Year Ended December 31, 2017 
  Duke
 Duke
Duke
Duke
Duke
 
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Income tax expense, computed at the statutory rate of 35 percent$1,493
$653
$536
$353
$265
$88
$229
$70
State income tax, net of federal income tax effect69
36
25
8
26
(1)23
3
AFUDC equity income(81)(37)(32)(17)(16)(4)(8)
Renewable energy production tax credits(132)






Tax Act(a)
(112)15
(246)(40)(226)(23)55
(12)
Tax true up(52)(24)(19)(13)(7)(5)(6)
Other items, net11
9

1
4
4
8
1
Income tax expense from continuing operations$1,196
$652
$264
$292
$46
$59
$301
$62
Effective tax rate28.0%34.9%17.2%29.0%6.1%23.4%46.0%30.8%
(a)Amounts primarily include but are not limited to items that are excluded for ratemaking purposes related to abandoned or impaired assets, certain wholesale fixed rate contracts, remeasurement of nonregulated net deferred tax liabilities, Federal net operating losses, and valuation allowance on foreign tax credits.

 Year Ended December 31, 2016
  Duke
 Duke
Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Income tax expense, computed at the statutory rate of 35 percent$1,307
$630
$548
$315
$306
$95
$212
State income tax, net of federal income tax effect64
46
20
10
30
(2)11
AFUDC equity income(70)(36)(26)(17)(9)(2)(6)
Renewable energy production tax credits(97)





Audit adjustment5
3





Tax true-up(14)(14)(11)(3)(9)(16)2
Other items, net(39)5
(4)(4)4
3
6
Income tax expense from continuing operations$1,156
$634
$527
$301
$322
$78
$225
Effective tax rate31.0%35.2%33.7%33.4%36.9%28.9%37.1%


 Year Ended December 31, 2015
  Duke
 Duke
Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Income tax expense, computed at the statutory rate of 35 percent$1,369
$598
$555
$302
$330
$81
$168
State income tax, net of federal income tax effect109
46
18
15
33
2
2
AFUDC equity income(58)(34)(19)(17)(3)(1)(4)
Renewable energy production tax credits(72)
(1)



Audit adjustment(22)
(23)1
(24)

Tax true-up2
2
(3)(4)2
(5)(9)
Other items, net(72)15
(5)(3)4
4
6
Income tax expense from continuing operations$1,256
$627
$522
$294
$342
$81
$163
Effective tax rate32.1%36.7%32.9%34.2%36.3%35.2%34.0%
FINANCIAL STATEMENTSINCOME TAXES


Year Ended December 31, 2016
Piedmont Duke
 Duke
Duke
Duke
Duke
Two Months Ended
Years Ended October 31,Duke
Energy
Progress
Energy
Energy
Energy
Energy
(in millions)
December 31, 201620162015Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Income tax expense, computed at the statutory rate of 35 percent$30
$111
$79
$1,307
$630
$548
$315
$306
$95
$212
State income tax, net of federal income tax effect1
11
9
64
46
20
10
30
(2)11
AFUDC equity income(70)(36)(26)(17)(9)(2)(6)
Renewable energy production tax credits(97)





Audit adjustment5
3





Tax true up(14)(14)(11)(3)(9)(16)2
Other items, net1
2
2
(39)5
(4)(4)4
3
6
Income tax expense from continuing operations$32
$124
$90
$1,156
$634
$527
$301
$322
$78
$225
Effective tax rate37.2%39.1%39.7%31.0%35.2%33.7%33.4%36.9%28.9%37.1%
 Piedmont
 Two Months EndedYear Ended October 31,
(in millions)  
December 31, 20162016
Income tax expense, computed at the statutory rate of 35 percent$30
$111
State income tax, net of federal income tax effect1
11
Other items, net1
2
Income tax expense from continuing operations$32
$124
Effective tax rate37.2%39.1%
Valuation allowances have been established for certain state NOL carryforwards and state income tax credits that reduce deferred tax assets to an amount that will be realized on a more-likely-than-not basis. The net change in the total valuation allowance is included in the State income tax, net of federal income tax effect in the above tables.



248

PART II
FINANCIAL STATEMENTSINCOME TAXES
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

DEFERRED TAXES
Net Deferred Income Tax Liability Components
December 31, 2017December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Deferred credits and other liabilities$143
$33
$78
$23
$49
$11
$6
$(5)$164
$64
$35
$53
$
$17
$6
$17
Capital lease obligations49
14




2

60
26




2

Pension, post-retirement and other employee benefits295
(17)111
44
60
14
18
(4)347
24
110
47
58
16
24
(1)
Progress Energy merger purchase accounting adjustments(a)
536







483







Tax credits and NOL carryforwards4,527
234
402
156
143
25
216
70
4,580
257
693
215
363
42
237
110
Regulatory liabilities and deferred credits
222



65

61





56

48
Investments and other assets





1
18





18

16
Other73
10
1
4




25
6
5
5

1
(1)
Valuation allowance(519)
(14)




(484)






Total deferred income tax assets5,104
496
578
227
252
115
243
140
5,175
377
843
320
421
150
268
190
Investments and other assets(1,419)(849)(470)(289)(187)
(14)
(1,317)(795)(430)(272)(163)
(5)
Accelerated depreciation rates(9,216)(3,060)(2,803)(1,583)(1,257)(896)(966)(697)(10,124)(3,207)(3,369)(1,735)(1,670)(967)(1,081)(733)
Regulatory assets and deferred debits, net(1,090)
(807)(238)(569)
(188)
(1,540)(64)(985)(432)(574)
(191)
Other






(7)






(8)
Total deferred income tax liabilities(11,725)(3,909)(4,080)(2,110)(2,013)(896)(1,168)(704)(12,981)(4,066)(4,784)(2,439)(2,407)(967)(1,277)(741)
Net deferred income tax liabilities$(6,621)$(3,413)$(3,502)$(1,883)$(1,761)$(781)$(925)$(564)$(7,806)$(3,689)$(3,941)$(2,119)$(1,986)$(817)$(1,009)$(551)
(a)Primarily related to capital lease obligations and debt fair value adjustments.
As noted above, as a result of the Tax Act, Duke Energy revalued its existing deferred tax assets and liabilities as of December 31, 2017, to account for the estimated future impact of lower corporate tax rates on these deferred amounts. The following table shows the decrease reflected in the net deferred income tax liabilities balance above:
(in millions)December 31, 2017
Duke Energy$8,982
Duke Energy Carolinas3,454
Progress Energy3,282
Duke Energy Progress1,882
Duke Energy Florida1,420
Duke Energy Ohio771
Duke Energy Indiana1,053
Piedmont521
The following table presents the expiration of tax credits and NOL carryforwards.
 December 31, 2017
(in millions)  
Amount
 Expiration Year
Investment tax credits$1,406
 2024  2037
Alternative minimum tax credits1,147
 Refundable by 2021
Federal NOL carryforwards393
 2022  2036
State NOL carryforwards and credits(a)
296
 2018  2037
Foreign NOL carryforwards(b)
13
 2027  2036
Foreign Tax Credits(c)
1,272
 2024  2027
Total tax credits and NOL carryforwards4,527
      

249

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 December 31, 2018
(in millions)  
Amount
 Expiration Year
Investment tax credits$1,614
 2024  2038
Alternative minimum tax credits574
 Refundable by 2021
Federal NOL carryforwards(a)(e)
788
 2022  Indefinite
State NOL carryforwards and credits(b)(e)
301
 2019  Indefinite
Foreign NOL carryforwards(c)
12
 2027  2037
Foreign Tax Credits(d)
1,271
 2024  2027
Charitable contribution carryforwards20
 2019  2023
Total tax credits and NOL carryforwards$4,580
      
(a)A valuation allowance of $90$4 million has been recorded on the Federal NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table.
(b)A valuation allowance of $85 million has been recorded on the state NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table.
(b)(c)A valuation allowance of $13$12 million has been recorded on the foreign NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table.
(c)(d)A valuation allowance of $416$383 million has been recorded on the foreign tax credits, as presented in the Net Deferred Income Tax Liability Components table.
(e)Indefinite carryforward for Federal NOLs, and NOLs for states that have adopted the Tax Act's NOL provisions, generated in tax years beginning after December 31, 2017.



 December 31, 2016
  Duke
 Duke
Duke
Duke
Duke
 
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Deferred credits and other liabilities$382
$66
$126
$40
$93
$21
$4
$71
Capital lease obligations60
8




1

Pension, post-retirement and other employee benefits561
16
199
91
96
22
37
10
Progress Energy merger purchase accounting adjustments(a)
918







Tax credits and NOL carryforwards4,682
192
1,165
222
232
49
278
192
Investments and other assets




3


Other205
16
35
8

5
9
45
Valuation allowance(96)
(12)



(1)
Total deferred income tax assets6,712
298
1,513
361
421
100
329
317
Investments and other assets(1,892)(1,149)(597)(313)(297)
(21)(21)
Accelerated depreciation rates(14,872)(4,664)(4,490)(2,479)(2,038)(1,404)(1,938)(1,080)
Regulatory assets and deferred debits, net (4,103)(1,029)(1,672)(892)(780)(139)(270)(147)
Total deferred income tax liabilities(20,867)(6,842)(6,759)(3,684)(3,115)(1,543)(2,229)(1,248)
Net deferred income tax liabilities$(14,155)$(6,544)$(5,246)$(3,323)$(2,694)$(1,443)$(1,900)$(931)
FINANCIAL STATEMENTSINCOME TAXES


 December 31, 2017
  Duke
 Duke
Duke
Duke
Duke
 
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Deferred credits and other liabilities$143
$33
$78
$23
$49
$11
$6
$(5)
Capital lease obligations49
14




2

Pension, post-retirement and other employee benefits295
(17)111
44
60
14
18
(4)
Progress Energy merger purchase accounting adjustments(a)
536







Tax credits and NOL carryforwards4,527
234
402
156
143
25
216
70
Regulatory liabilities and deferred credits
222



65

61
Investments and other assets





1
18
Other73
10
1
4




Valuation allowance(519)
(14)




Total deferred income tax assets5,104
496
578
227
252
115
243
140
Investments and other assets(1,419)(849)(470)(289)(187)
(14)
Accelerated depreciation rates(9,216)(3,060)(2,803)(1,583)(1,257)(896)(966)(697)
Regulatory assets and deferred debits, net (1,090)
(807)(238)(569)
(188)
Other






(7)
Total deferred income tax liabilities(11,725)(3,909)(4,080)(2,110)(2,013)(896)(1,168)(704)
Net deferred income tax liabilities$(6,621)$(3,413)$(3,502)$(1,883)$(1,761)$(781)$(925)$(564)
(a)Primarily related to capital lease obligations and debt fair value adjustments.
On August 6, 2015, pursuant to N.C. Gen. Stat. 105-130.3C, the North Carolina Department of Revenue announced the North Carolina corporate income tax rate would be reduced from a statutory rate of 5.0 percent to 4.0 percent beginning January 1, 2016. Duke Energy and Piedmont recorded net reductions of approximately $95 million and $18 million to their North Carolina deferred tax liabilities in the third quarter of 2015. The significant majority of these deferred tax liability reductions were offset by recording a regulatory liability pending NCUC determination of the disposition of amounts related to Duke Energy Carolinas, Duke Energy Progress and Piedmont. The impact did not have a significant impact on the financial position, results of operation, or cash flows of Duke Energy, Duke Energy Carolinas, Progress Energy or Duke Energy Progress.
On August 4, 2016, pursuant to N.C. Gen. Stat. 105-130.3C, the North Carolina Department of Revenue announced the North Carolina corporate income tax rate would be reduced from a statutory rate of 4.0 percent to 3.0 percent beginning January 1, 2017. Duke Energy and Piedmont recorded net reductions of approximately $80 million and $16 million to their North Carolina deferred tax liabilities in the third quarter of 2016. The significant majority of this deferred tax liability reduction was offset by recording a regulatory liability pending NCUC determination of the disposition of amounts related to Duke Energy Carolinas, Duke Energy Progress and Piedmont. The impact did not have a significant impact on the financial position, results of operation, or cash flows of Duke Energy, Duke Energy Carolinas, Progress Energy or Duke Energy Progress.
On June 28, 2017, the North Carolina General Assembly amended N.C. Gen. Stat. 105-130.3, reducing the North Carolina corporate income tax rate from a statutory rate of 3.0 percent to 2.5 percent beginning January 1, 2019. Duke Energy recorded a net reduction of approximately $55 million to their North Carolina deferred tax liabilities in the second quarter of 2017. The significant majority of this deferred tax liability reduction was offset by recording a regulatory liability pending NCUC determination of the disposition of amounts related to Duke Energy Carolinas, Duke Energy Progress and Piedmont. The impact did not have a significant impact on the financial position, results of operation or cash flows of Duke Energy, Duke Energy Carolinas, Progress Energy or Duke Energy Progress.

250

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

UNRECOGNIZED TAX BENEFITS
The following tables present changes to unrecognized tax benefits.
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Unrecognized tax benefits – January 1$17
$1
$2
$2
$4
$4
$
$
$25
$5
$5
$5
$5
$1
$1
$3
Unrecognized tax benefits increases (decreases)  
Gross increases – tax positions in prior periods12
4
3
3
1
1
1
3
Gross decreases – tax positions in prior periods(4)



(4)

(2)(1)

(4)


Gross increases – current period tax positions7
2
4
1
2


1
Decreases due to settlements(6)






Total changes8
4
3
3
1
(3)1
3
(1)1
4
1
(2)

1
Unrecognized tax benefits – December 31$25
$5
$5
$5
$5
$1
$1
$3
$24
$6
$9
$6
$3
$1
$1
$4



FINANCIAL STATEMENTSINCOME TAXES


 Year Ended December 31, 2017 
  Duke
 Duke
Duke
Duke
Duke
 
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Unrecognized tax benefits – January 1$17
$1
$2
$2
$4
$4
$
$
Unrecognized tax benefits increases (decreases)        
Gross increases – tax positions in prior periods12
4
3
3
1
1
1
3
Gross decreases – tax positions in prior periods(4)



(4)

Total changes8
4
3
3
1
(3)1
3
Unrecognized tax benefits – December 31$25
$5
$5
$5
$5
$1
$1
$3
 Year Ended December 31, 2016
  Duke
 Duke
Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Unrecognized tax benefits – January 1$88
$72
$1
$3
$
$
$1
Unrecognized tax benefits increases (decreases)       
Gross increases – tax positions in prior periods



4
4

Gross decreases – tax positions in prior periods(4)(4)(1)(1)


Decreases due to settlements(68)(67)



(1)
Reduction due to lapse of statute of limitations1

2




Total changes(71)(71)1
(1)4
4
(1)
Unrecognized tax benefits – December 31$17
$1
$2
$2
$4
$4
$
 Year Ended December 31, 2015
  Duke
 Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Indiana
Unrecognized tax benefits – January 1$213
$160
$32
$23
$8
$1
Unrecognized tax benefits increases (decreases)      
Gross increases – tax positions in prior periods

1
1


Gross decreases – tax positions in prior periods(48)(45)



Decreases due to settlements(45)(43)



Reduction due to lapse of statute of limitations(32)
(32)(21)(8)
Total changes(125)(88)(31)(20)(8)
Unrecognized tax benefits – December 31$88
$72
$1
$3
$
$1

251

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table includes additional information regarding the Duke Energy Registrants' unrecognized tax benefits at December 31, 2017. During the first quarter of 2018,2018. All Duke Energy recognized an approximate $8 million reduction and Duke Energy Carolinas recognized an approximate $1 million reductionRegistrants do not anticipate a material increase or decrease in unrecognized tax benefits. No additional material reductions are expected inbenefits within the next 12 months.
December 31, 2017December 31, 2018
 Duke
 Duke
Duke
Duke
Duke
  Duke
 Duke
Duke
Duke
Duke
 
Duke
Energy
Progress
Energy
Energy
Energy
Energy
 Duke
Energy
Progress
Energy
Energy
Energy
Energy
 
(in millions)
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Energy
Carolinas
Energy
Progress
Florida
Ohio
Indiana
Piedmont
Amount that if recognized, would affect the
effective tax rate or regulatory liability(a)
$15
$4
$7
$5
$1
$1
$1
$3
$21
$6
$9
$6
$3
$1
$1
$4
Amount that if recognized, would be recorded as
a component of discontinued operations
7




2


2







(a)Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana and Piedmont are unable to estimate the specific amounts that would affect the effective tax rate versus the regulatory liability.



FINANCIAL STATEMENTSINCOME TAXES


OTHER TAX MATTERS
The following tables include interest recognized in the Consolidated Statements of Operations and the Consolidated Balance Sheets.
Year Ended December 31, 2017Year Ended December 31, 2018
 Duke
 Duke
Duke
 Duke
Duke
Energy
Progress
Energy
Energy
Duke
Progress
Energy
(in millions)
Energy
Carolinas
Energy
Progress
Florida
Energy
Energy
Progress
Net interest income recognized related to income taxes$
$
$1
$
$1
$2
$
$
Net interest expense recognized related to income taxes
2



Interest payable related to income taxes5
25
1
1

3
1
1
 Year Ended December 31, 2017
  Duke
 Duke
Duke
 Duke
Energy
Progress
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Net interest income recognized related to income taxes$
$
$1
$
$1
Net interest expense recognized related to income taxes
2



Interest payable related to income taxes5
25
1
1

 Year Ended December 31, 2016
  Duke
 Duke
Duke
 Duke
Energy
Progress
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Net interest income recognized related to income taxes$
$
$1
$
$2
Net interest expense recognized related to income taxes
7



Interest payable related to income taxes4
23
1
1

 Year Ended December 31, 2015
  Duke
 Duke
Duke
Duke
 Duke
Energy
Progress
Energy
Energy
Energy
(in millions)  
Energy
Carolinas
Energy
Progress
Florida
Indiana
Net interest income recognized related to income taxes$12
$
$2
$2
$1
$1
Net interest expense recognized related to income taxes
1




Interest receivable related to income taxes3




3
Interest payable related to income taxes
14

1


 
Piedmont recognized $1 million in net interest income recognized related to income taxes in the Consolidated Statements of Operations for the year ended October 31, 2016.
Duke Energy and its subsidiaries are no longer subject to U.S. federal examination for years before 2015. With few exceptions, Duke Energy and its subsidiaries are no longer subject to state, local or non-U.S. income tax examinations by tax authorities for years before 2015.
23.24. OTHER INCOME AND EXPENSES, NET
The components of Other income and expenses, net on the Consolidated Statements of Operations are as follows. Amounts for Piedmont were not material.
 Year Ended December 31, 2018
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Interest income$20
 $1
 $18
 $1
 $18
 $7
 $9
 $1
AFUDC equity221
 73
 104
 57
 47
 11
 32
 
Post in-service equity returns15
 9
 5
 5
 
 1
 
 
Nonoperating income, other143
 70
 38
 24
 21
 4
 4
 13
Other income and expense, net$399
 $153
 $165
 $87
 $86
 $23
 $45
 $14
 Year Ended December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
  
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Interest income$13
 $2
 $6
 $2
 $5
 $6
 $8
 $
AFUDC equity237
 106
 92
 47
 45
 11
 28
 
Post in-service equity returns40
 28
 12
 12
 
 
 
 
Nonoperating income, other218
 63
 99
 54
 46
 6
 11
 (11)
Other income and expense, net$508
 $199
 $209
 $115
 $96
 $23
 $47
 $(11)



252

PART II
FINANCIAL STATEMENTSOTHER INCOME AND EXPENSES, NET
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 Year Ended December 31, 2017
   Duke
   Duke
 Duke
 Duke
 Duke
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Interest income$13
 $2
 $6
 $2
 $5
 $6
 $8
AFUDC equity237
 106
 92
 47
 45
 11
 28
Post in-service equity returns40
 28
 12
 12
 
 
 
Nonoperating income, other62
 3
 18
 4
 11
 
 1
Other income and expense, net$352
 $139
 $128
 $65
 $61
 $17
 $37
Year Ended December 31, 2016Year Ended December 31, 2016
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Interest income$21
 $4
 $4
 $3
 $2
 $5
 $6
$21
 $4
 $4
 $3
 $2
 $5
 $6
AFUDC equity200
 102
 76
 50
 26
 6
 16
200
 102
 76
 50
 26
 6
 16
Post in-service equity returns67
 55
 12
 12
 
 
 
67
 55
 12
 12
 
 
 
Nonoperating income (expense), other36
 1
 22
 6
 16
 (2) 
Nonoperating income, other175
 53
 94
 67
 35
 
 4
Other income and expense, net(a)$324
 $162
 $114
 $71
 $44
 $9
 $22
$463
 $214
 $186
 $132
 $63
 $11
 $26
 Year Ended December 31, 2015
   Duke
   Duke
 Duke
 Duke
 Duke
 Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
(in millions)Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Interest income$20
 $2
 $4
 $2
 $2
 $4
 $6
AFUDC equity164
 96
 54
 47
 7
 3
 11
Post in-service equity returns73
 60
 13
 13
 
 
 
Nonoperating income (expense), other33
 2
 26
 9
 15
 (1) (6)
Other income and expense, net$290
 $160
 $97
 $71
 $24
 $6
 $11
(a)Amounts for Piedmont for the two months ended December 31, 2016, and for the year ended October 31, 2016, were not material.
24.25. SUBSEQUENT EVENTS
For information on subsequent events related to the adoption of the new lease accounting standard, regulatory matters, commitments and contingencies and debt and credit facilities, investments in unconsolidated affiliates, variable interest entities and common stock see Notes 1, 4, 5 and 6, 12, 17 and 18, respectively.



253

FINANCIAL STATEMENTSQUARTERLY FINANCIAL DATA
PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

25.26. QUARTERLY FINANCIAL DATA (UNAUDITED)
DUKE ENERGY
Quarterly EPS amounts may not sum to the full-year total due to changes in the weighted average number of common shares outstanding and rounding.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions, except per share data)Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$6,135
 $5,643
 $6,628
 $6,115
 $24,521
Operating income1,256
 979
 1,579
 871
 4,685
Income from continuing operations622
 507
 1,062
 434
 2,625
(Loss) Income from discontinued operations, net of tax
 (5) 4
 20
 19
Net income622
 502
 1,066
 454
 2,644
Net income attributable to Duke Energy Corporation620
 500
 1,082
 464
 2,666
Earnings per share:         
Income from continuing operations attributable to Duke Energy Corporation common stockholders         
Basic$0.88
 $0.72
 $1.51
 $0.62
 $3.73
Diluted$0.88
 $0.72
 $1.51
 $0.62
 $3.73
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders         
Basic$
 $(0.01) $
 $0.03
 $0.03
Diluted$
 $(0.01) $
 $0.03
 $0.03
Net income attributable to Duke Energy Corporation common stockholders         
Basic$0.88
 $0.71
 $1.51
 $0.65
 $3.76
Diluted$0.88
 $0.71
 $1.51
 $0.65
 $3.76
2017                  
Operating revenues$5,729
 $5,555
 $6,482
 $5,799
 $23,565
$5,729
 $5,555
 $6,482
 $5,799
 $23,565
Operating income1,437
 1,387
 1,695
 1,262
 5,781
1,402
 1,353
 1,661
 1,209
 5,625
Income from continuing operations717
 691
 957
 705
 3,070
717
 691
 957
 705
 3,070
Loss from discontinued operations, net of tax
 (2) (2) (2) (6)
 (2) (2) (2) (6)
Net income717
 689
 955
 703
 3,064
717
 689
 955
 703
 3,064
Net income attributable to Duke Energy Corporation716
 686
 954
 703
 3,059
716
 686
 954
 703
 3,059
Earnings per share:                  
Income from continuing operations attributable to Duke Energy Corporation common stockholders                  
Basic$1.02
 $0.98
 $1.36
 $1.00
 $4.37
$1.02
 $0.98
 $1.36
 $1.00
 $4.37
Diluted$1.02
 $0.98
 $1.36
 $1.00
 $4.37
$1.02
 $0.98
 $1.36
 $1.00
 $4.37
Loss from discontinued operations attributable to Duke Energy Corporation common stockholders                  
Basic$
 $
 $
 $
 $(0.01)$
 $
 $
 $
 $(0.01)
Diluted$
 $
 $
 $
 $(0.01)$
 $
 $
 $
 $(0.01)
Net income attributable to Duke Energy Corporation common stockholders                  
Basic$1.02
 $0.98
 $1.36
 $1.00
 $4.36
$1.02
 $0.98
 $1.36
 $1.00
 $4.36
Diluted$1.02
 $0.98
 $1.36
 $1.00
 $4.36
$1.02
 $0.98
 $1.36
 $1.00
 $4.36
2016         
Operating revenues$5,377
 $5,213
 $6,576
 $5,577
 $22,743
Operating income1,240
 1,259
 1,954
 888
 5,341
Income from continuing operations577
 624
 1,001
 376
 2,578
Income (Loss) from discontinued operations, net of tax122
 (112) 180
 (598) (408)
Net income (loss)699
 512
 1,181
 (222) 2,170
Net income (loss) attributable to Duke Energy Corporation694
 509
 1,176
 (227) 2,152
Earnings per share:         
Income from continuing operations attributable to Duke Energy Corporation common stockholders         
Basic$0.83
 $0.90
 $1.44
 $0.53
 $3.71
Diluted$0.83
 $0.90
 $1.44
 $0.53
 $3.71
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders         
Basic$0.18
 $(0.16) $0.26
 $(0.86) $(0.60)
Diluted$0.18
 $(0.16) $0.26
 $(0.86) $(0.60)
Net income (loss) attributable to Duke Energy Corporation common stockholders         
Basic$1.01
 $0.74
 $1.70
 $(0.33) $3.11
Diluted$1.01
 $0.74
 $1.70
 $(0.33) $3.11



254

PART II
FINANCIAL STATEMENTSQUARTERLY FINANCIAL DATA
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(17) $(20) $(16) $(31) $(84)
Regulatory and Legislative Impacts (see Note 4)(86) (179) 
 
 (265)
Sale of Retired Plant (see Note 3)(107) 
 
 
 (107)
Impairment Charges (see Notes 4, 11 and 12)(55) 
 (93) (60) (208)
Severance Charges (see Note 20)
 
 
 (187) (187)
Impacts of the Tax Act (see Note 23)(76) 
 3
 53
 (20)
Total$(341) $(199) $(106) $(225) $(871)
2017                  
Costs to Achieve Piedmont Merger (see Note 2)$(16) $(30) $(23) $(34) $(103)
Costs to Achieve Mergers (see Note 2)$(16) $(30) $(23) $(34) $(103)
Regulatory Settlements (see Note 4)
 
 (135) (23) (158)
 
 (135) (23) (158)
Commercial Renewables Impairments (see Notes 10 and 11)
 
 (84) (18) (102)
 
 (84) (18) (102)
Impacts of the Tax Act (see Note 22)
 
 
 102
 102
Impacts of the Tax Act (see Note 23)
 
 
 102
 102
Total$(16) $(30) $(242) $27
 $(261)$(16) $(30) $(242) $27
 $(261)
2016         
Costs to Achieve Mergers (see Note 2)$(120) $(111) $(84) $(208) $(523)
Commercial Renewables Impairment (see Note 12)
 
 (71) 
 (71)
Loss on Sale of International Disposal Group (see Note 2)
 
 
 (514) (514)
Impairment of Assets in Central America (see Note 2)
 (194) 
 
 (194)
Cost Savings Initiatives (see Note 19)(20) (24) (19) (29) (92)
Total$(140) $(329) $(174) $(751) $(1,394)
DUKE ENERGY CAROLINAS
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$1,763
 $1,672
 $2,090
 $1,775
 $7,300
Operating income482
 224
 713
 241
 1,660
Net income323
 117
 496
 135
 1,071
2017                  
Operating revenues$1,716
 $1,729
 $2,136
 $1,721
 $7,302
$1,716
 $1,729
 $2,136
 $1,721
 $7,302
Operating income484
 485
 777
 403
 2,149
471
 471
 763
 384
 2,089
Net income270
 273
 466
 205
 1,214
270
 273
 466
 205
 1,214
2016         
Operating revenues$1,740
 $1,675
 $2,226
 $1,681
 $7,322
Operating income481
 464
 815
 302
 2,062
Net income271
 261
 494
 140
 1,166
The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(4) $(2) $(2)
$(1) $(9)
Regulatory and Legislative Impacts (see Note 4)(19) (179) 
 
 (198)
Severance Charges (see Note 20)
 
 
 (102) (102)
Impacts of the Tax Act (see Note 23)
 
 (1) 
 (1)
Total$(23) $(181) $(3) $(103) $(310)
2017                  
Costs to Achieve Piedmont Merger (see Note 2)$(4) $(6) $(5)
$(5) $(20)$(4) $(6) $(5) $(5) $(20)
Impacts of the Tax Act (see Note 22)
 
 
 (15) (15)
Impacts of the Tax Act (see Note 23)
 
 
 (15) (15)
Total$(4) $(6) $(5) $(20) $(35)$(4) $(6) $(5) $(20) $(35)
2016         
Costs to Achieve Mergers$(11) $(12) $(13) $(68) $(104)
Cost Savings Initiatives (see Note 19)(10) (10) (8) (11) (39)
Total$(21) $(22) $(21) $(79) $(143)



255

PART II
FINANCIAL STATEMENTSQUARTERLY FINANCIAL DATA
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC �� DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

PROGRESS ENERGY
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$2,576
 $2,498
 $3,045
 $2,609
 $10,728
Operating income447
 484
 663
 334
 1,928
Net income237
 267
 406
 123
 1,033
Net income attributable to Parent235
 265
 404
 123
 1,027
2017                  
Operating revenues$2,179
 $2,392
 $2,864
 $2,348
 $9,783
$2,179
 $2,392
 $2,864
 $2,348
 $9,783
Operating income487
 591
 657
 493
 2,228
471
 576
 641
 459
 2,147
Net income201
 277
 343
 447
 1,268
201
 277
 343
 447
 1,268
Net income attributable to Parent199
 274
 341
 444
 1,258
199
 274
 341
 444
 1,258
2016         
Operating revenues$2,332
 $2,348
 $2,965
 $2,208
 $9,853
Operating income475
 560
 814
 292
 2,141
Income from continuing operations212
 274
 449
 104
 1,039
Net income212
 274
 449
 106
 1,041
Net income attributable to Parent209
 272
 446
 104
 1,031
The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(4) $(3) $(1) $(2) $(10)
Regulatory and Legislative Impacts (see Note 4)(67) 
 
 
 (67)
Impairment Charges (see Note 4)
 
 
 (60) (60)
Severance Charges (see Note 20)
 
 
 (69) (69)
Impacts of the Tax Act (see Note 23)(1) 
 (5) (19) (25)
Total$(72) $(3) $(6) $(150) $(231)
2017                  
Costs to Achieve Piedmont Merger (see Note 2)$(4) $(7) $(6) $(6) $(23)$(4) $(7) $(6) $(6) $(23)
Regulatory Settlements (see Note 4)
 
 (135) (23) (158)
 
 (135) (23) (158)
Impacts of the Tax Act (see Note 22)
 
 
 246
 246
Impacts of the Tax Act (see Note 23)
 
 
 246
 246
Total$(4) $(7) $(141) $217
 $65
$(4) $(7) $(141) $217
 $65
2016         
Costs to Achieve Mergers$(7) $(8) $(10) $(44) $(69)
Cost Savings Initiatives (see Note 19)(8) (8) (10) (14) (40)
Total$(15) $(16) $(20) $(58) $(109)
DUKE ENERGY PROGRESS
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$1,460
 $1,291
 $1,582
 $1,366
 $5,699
Operating income269
 233
 330
 227
 1,059
Net income177
 139
 216
 135
 667
2017                  
Operating revenues$1,219
 $1,199
 $1,460
 $1,251
 $5,129
$1,219
 $1,199
 $1,460
 $1,251
 $5,129
Operating income286
 282
 411
 256
 1,235
274
 270
 398
 243
 1,185
Net income147
 154
 246
 168
 715
147
 154
 246
 168
 715
2016         
Operating revenues$1,307
 $1,213
 $1,583
 $1,174
 $5,277
Operating income258
 255
 438
 135
 1,086
Net income137
 131
 271
 60
 599



FINANCIAL STATEMENTSQUARTERLY FINANCIAL DATA


The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
 First
 Second
 Third
 Fourth
  
(in millions)  
Quarter
 Quarter
 Quarter
 Quarter
 Total
2017         
Costs to Achieve Piedmont Merger (see Note 2)$(2) $(4) $(4) $(4) $(14)
Regulatory Settlements (see Note 4)
 
 
 (23) (23)
Impacts of the Tax Act (see Note 22)
 
 
 40
 40
Total$(2)
$(4)
$(4)
$13

$3
2016         
Costs to Achieve Mergers$(5) $(5) $(6) $(40) $(56)
Cost Savings Initiatives (see Note 19)(5) (5) (7) (6) (23)
Total$(10) $(10) $(13) $(46) $(79)

256

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 First
 Second
 Third
 Fourth
  
(in millions)  
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(2) $(2) $(1) $(1) $(6)
Regulatory and Legislative Impacts (see Note 4)(67) 
 
 
 (67)
Severance Charges (see Note 20)
 
 
 (52) (52)
Impacts of the Tax Act (see Note 23)
 
 (4) (15) (19)
Total$(69)
$(2)
$(5)
$(68)
$(144)
2017         
Costs to Achieve Piedmont Merger (see Note 2)$(2) $(4) $(4) $(4) $(14)
Regulatory Settlements (see Note 4)
 
 
 (23) (23)
Impacts of the Tax Act (see Note 23)
 
 
 40
 40
Total$(2) $(4) $(4) $13
 $3
DUKE ENERGY FLORIDA
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$1,115
 $1,203
 $1,462
 $1,241
 $5,021
Operating income173
 245
 331
 107
 856
Net income103
 168
 243
 40
 554
2017                  
Operating revenues$959
 $1,191
 $1,401
 $1,095
 $4,646
$959
 $1,191
 $1,401
 $1,095
 $4,646
Operating income196
 306
 240
 234
 976
192
 301
 236
 212
 941
Net income90
 158
 120
 344
 712
90
 158
 120
 344
 712
2016         
Operating revenues$1,024
 $1,133
 $1,381
 $1,030
 $4,568
Operating income213
 300
 373
 155
 1,041
Net income110
 171
 206
 64
 551
The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(2) $(1) $
 $(1) $(4)
Impairment Charges (see Note 4)
 
 
 (60) (60)
Severance Charges (see Note 20)
 
 
 (17) (17)
Impacts of the Tax Act (see Note 23)
 
 (2) 2
 
Total$(2) $(1) $(2) $(76) $(81)
2017                  
Costs to Achieve Piedmont Merger (see Note 2)$(2) $(3) $(2) $(2) $(9)$(2) $(3) $(2) $(2) $(9)
Regulatory Settlements (see Note 4)
 
 (135) 
 (135)
 
 (135) 
 (135)
Impacts of the Tax Act (see Note 22)
 
 
 226
 226
Impacts of the Tax Act (see Note 23)
 
 
 226
 226
Total$(2) $(3) $(137) $224
 $82
$(2) $(3) $(137) $224
 $82
2016         
Costs to Achieve Mergers$(2) $(3) $(4) $(4) $(13)
Cost Savings Initiatives (see Note 19)(2) (3) (3) (9) (17)
Total$(4) $(6) $(7) $(13) $(30)



FINANCIAL STATEMENTSQUARTERLY FINANCIAL DATA


DUKE ENERGY OHIO
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$524
 $459
 $469
 $505
 $1,957
Operating (loss) income(21) 77
 139
 93
 288
Net (loss) income(25) 46
 100
 55
 176
2017                  
Operating revenues$518
 $437
 $471
 $497
 $1,923
$518
 $437
 $471
 $497
 $1,923
Operating income83
 65
 102
 76
 326
82
 64
 101
 73
 320
Loss from discontinued operations, net of tax
 
 (1) 
 (1)
 
 (1) 
 (1)
Net income42
 30
 55
 65
 192
42
 30
 55
 65
 192
2016         
Operating revenues$516
 $428
 $489
 $511
 $1,944
Operating income96
 55
 106
 90
 347
Income from discontinued operations, net of tax2
 
 34
 
 36
Net income59
 23
 89
 57
 228
The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
 First
 Second
 Third
 Fourth
  
(in millions)  
Quarter
 Quarter
 Quarter
 Quarter
 Total
2017         
Costs to Achieve Piedmont Merger (see Note 2)$(1) $(1) $(2) $(2) $(6)
Impacts of the Tax Act (see Note 22)
 
 
 23
 23
Total$(1) $(1) $(2) $21
 $17
2016         
Costs to Achieve Mergers$(1) $(1) $(2) $(2) $(6)
Cost Savings Initiatives (see Note 19)(1) (1) 
 (1) (3)
Total$(2) $(2) $(2) $(3) $(9)

257

PART II
DUKE ENERGY CORPORATION – DUKE ENERGY CAROLINAS, LLC – PROGRESS ENERGY, INC. –
DUKE ENERGY PROGRESS, LLC – DUKE ENERGY FLORIDA, LLC – DUKE ENERGY OHIO, INC. – DUKE ENERGY INDIANA, LLC– PIEDMONT NATURAL GAS COMPANY, INC.
Combined Notes To Consolidated Financial Statements – (Continued)

 First
 Second
 Third
 Fourth
  
(in millions)  
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(3) $(5) $
 $(6) $(14)
Sale of Retired Plant (see Note 3)(107) 
 
 
 (107)
Severance Charges (see Note 20)
 
 
 (6) (6)
Impacts of the Tax Act (see Note 23)
 
 
 (2) (2)
Total$(110) $(5) $
 $(14) $(129)
2017         
Costs to Achieve Piedmont Merger (see Note 2)$(1) $(1) $(2) $(2) $(6)
Impacts of the Tax Act (see Note 23)
 
 
 23
 23
Total$(1) $(1) $(2) $21
 $17
DUKE ENERGY INDIANA
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$731
 $738
 $819
 $771
 $3,059
Operating income168
 169
 173
 133
 643
Net income100
 98
 119
 76
 393
2017                  
Operating revenues$758
 $742
 $802
 $745
 $3,047
$758
 $742
 $802
 $745
 $3,047
Operating income186
 210
 230
 170
 796
184
 208
 228
 166
 786
Net income91
 106
 121
 36
 354
91
 106
 121
 36
 354
2016         
Operating revenues$714
 $702
 $809
 $733
 $2,958
Operating income176
 174
 239
 176
 765
Net income95
 85
 129
 72
 381
The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)
Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$
 $
 $(2) $
 $(2)
Severance Charges (see Note 20)
 
 
 (7) (7)
Total$
 $
 $(2) $(7) $(9)
2017                  
Costs to Achieve Piedmont Merger (see Note 2)$(1) $(2) $(2) $(1) $(6)$(1) $(2) $(2) $(1) $(6)
Impacts of the Tax Act (see Note 22)
 
 
 (55) (55)
Impacts of the Tax Act (see Note 23)
 
 
 (55) (55)
Total$(1) $(2) $(2) $(56) $(61)$(1) $(2) $(2) $(56) $(61)
2016         
Costs to Achieve Mergers$(1) $(2) $(3) $(3) $(9)
Cost Savings Initiatives (see Note 19)(1) (4) (1) (1) (7)
Total$(2) $(6) $(4) $(4) $(16)
PIEDMONT



FINANCIAL STATEMENTSQUARTERLY FINANCIAL DATA


The following tables include data for Piedmont's fiscal years ending December 31, 2017, and October 31, 2016.PIEDMONT
 First
 Second
 Third
 Fourth
  
(in millions)Quarter
 Quarter
 Quarter
 Quarter
 Total
2017         
Operating revenues$500
 $201
 $183
 $444
 $1,328
Operating income (loss)170
 5
 (4) 115
 286
Net income (loss)95
 (8) (11) 63
 139
2016         
Operating revenues$464
 $353
 $160
 $172
 $1,149
Operating income (loss)171
 104
 
 (50) 225
Net income (loss)98
 63
 (7) 39
 193
For the two months ended December 31, 2016, Piedmont's operating revenues, operating income, and net income were $322 million, $96 million and $54 million, respectively.
 First
 Second
 Third
 Fourth
  
(in millions)Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Operating revenues$553
 $215
 $172
 $435
 $1,375
Operating income (loss)161
 5
 (19) 79
 226
Net income (loss)110
 (8) (21) 48
 129
2017         
Operating revenues$500
 $201
 $183
 $444
 $1,328
Operating income (loss)170
 5
 (4) 126
 297
Net income (loss)95
 (8) (11) 63
 139
The following table includes unusual or infrequently occurring items in each quarter during the two most recently completed fiscal years. All amounts discussed below are pretax.
First
 Second
 Third
 Fourth
  First
 Second
 Third
 Fourth
  
(in millions)Quarter
 Quarter
 Quarter
 Quarter
 Total
Quarter
 Quarter
 Quarter
 Quarter
 Total
2018         
Costs to Achieve Piedmont Merger (see Note 2)$(6) $(9) $(11) $(22) $(48)
Severance Charges (see Note 20)
 
 
 (2) (2)
Total$(6) $(9) $(11) $(24) $(50)
2017                  
Costs to Achieve Piedmont Merger (see Note 2)$(6) $(13) $(8) $(19) $(46)$(6) $(13) $(8) $(19) $(46)
Impacts of the Tax Act (see Note 22)
 
 
 2
 2
Impacts of the Tax Act (see Note 23)
 
 
 2
 2
Total$(6) $(13) $(8) $(17) $(44)$(6) $(13) $(8) $(17) $(44)
2016         
Costs to Achieve Mergers$(6) $(2) $(1) $(53) $(62)

For the two months ended December 31, 2016, Piedmont's costs to achieve merger were $7 million.

258

INDEPENDENT ACCOUNTANTS

PART II

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
 
None.



259

CONTROLS AND PROCEDURES

PART II

ITEM 9A. CONTROLS AND PROCEDURES
 
Disclosure Controls and Procedures
Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed by the Duke Energy Registrants in the reports they file or submit under the Securities Exchange Act of 1934 (Exchange Act) is recorded, processed, summarized and reported, within the time periods specified by the SEC rules and forms.
Disclosure controls and procedures include, without limitation, controls and procedures designed to provide reasonable assurance that information required to be disclosed by the Duke Energy Registrants in the reports they file or submit under the Exchange Act is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.
Under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, the Duke Energy Registrants have evaluated the effectiveness of their disclosure controls and procedures (as such term is defined in Rule 13a-15(e) and 15d-15(e) under the Exchange Act) as of December 31, 2017,2018, and, based upon this evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that these controls and procedures are effective in providing reasonable assurance of compliance.
Changes in Internal Control Over Financial Reporting
Under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, the Duke Energy Registrants have evaluated changes in internal control over financial reporting (as such term is defined in Rules 13a-15(f)13a-15 and 15d-15(f)15d-15 under the Exchange Act) that occurred during the fiscal quarter ended December 31, 2017,2018, and have concluded no change has materially affected, or is reasonably likely to materially affect, internal control over financial reporting.
Management’s Annual Report Onon Internal Control Over Financial Reporting
The Duke Energy Registrants’ management is responsible for establishing and maintaining an adequate system of internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). The Duke Energy Registrants’ internal control system was designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes, in accordance with generally accepted accounting principles in the United States. Due to inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness of the internal control over financial reporting to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with policies and procedures may deteriorate.
The Duke Energy Registrants’ management, including their Chief Executive Officer and Chief Financial Officer, has conducted an evaluation of the effectiveness of their internal control over financial reporting as of December 31, 2017,2018, based on the framework in the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on that evaluation, management concluded that its internal controls over financial reporting were effective as of December 31, 2017.2018.
Deloitte & Touche LLP, Duke Energy’s independent registered public accounting firm, has issued an attestation report on the effectiveness of Duke Energy’s internal control over financial reporting. This attestation reportreporting, which is included in Part II, Item 8 of this Form 10-K.herein. This report is not applicable to the Subsidiary Registrants as these companies are not accelerated or large accelerated filers.



260

REPORTS

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the shareholders and the Board of Directors of Duke Energy Corporation
Opinion on Internal Control over Financial Reporting
We have audited the internal control over financial reporting of Duke Energy Corporation and subsidiaries (the "Company"“Company”) as of December 31, 2017,2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017,2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheetsfinancial statements as of December 31, 2017, the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows, for the period ended December 31, 2017, and the related notes2018, of the Company and our report dated February 23, 2018,28, 2019, expressed an unqualified opinion on those financial statements.
Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’sManagement's Annual Report Onon Internal Control Over Financial Reporting.Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/Deloitte & Touche LLP
Charlotte, North Carolina
February 21, 201828, 2019



261

OTHER INFORMATION

PART III

 
ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
 
Information regarding Duke Energy's Executive Officers is set forth in Part I, Item 1, "Business – Executive Officers of the Registrants," in this Annual Report on Form 10-K. Duke Energy will provide information that is responsive to the remainder of this Item 10 in its definitive proxy statement or in an amendment to this Annual Report not later than 120 days after the end of the fiscal year covered by this Annual Report. That information is incorporated in this Item 10 by reference.
ITEM 11. EXECUTIVE COMPENSATION
 
Duke Energy will provide information that is responsive to this Item 11 in its definitive proxy statement or in an amendment to this Annual Report not later than 120 days after the end of the fiscal year covered by this Annual Report. That information is incorporated in this Item 11 by reference.
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
 
Equity Compensation Plan Information
The following table shows information as of December 31, 2017,2018, about securities to be issued upon exercise of outstanding options, warrants and rights under Duke Energy's equity compensation plans, along with the weighted-average exercise price of the outstanding options, warrants and rights and the number of securities remaining available for future issuance under the plans.
Plan Category
Number of securities
to be issued upon
exercise of
outstanding options,
warrants and rights
(a)
Weighted average
exercise price of
outstanding options,
warrants and rights
(b)(1)
Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
(c)
Number of securities
to be issued upon
exercise of
outstanding options,
warrants and rights
(a)
Weighted average
exercise price of
outstanding options,
warrants and rights
(b)(1)
Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
(c)
Equity compensation plans approved by security holders3,566,563
(2) 
n/a7,314,882
(3) 
3,729,606
(2) 
n/a6,080,741
(3) 
Equity compensation plans not approved by security holders191,394
(4) 
n/a
(5) 
186,900
(4) 
n/a
(5) 
Total3,757,957
 n/a7,314,882 3,916,506
 n/a6,080,741 
(1)    As of December 31, 2017, no options were outstanding under equity compensation plans.
(1)As of December 31, 2018, no options were outstanding under equity compensation plans.
(2)Includes restricted stock units and performance shares (assuming the maximum payout level) granted under the Duke Energy Corporation 2010 Long-Term Incentive Plan or the Duke Energy Corporation 2015 Long-Term Incentive Plan, as well as shares that could be payable with respect to certain compensation deferred under the Duke Energy Corporation Executive Savings Plan (Executive Savings Plan) or the Duke Energy Corporation Directors'Directors’ Savings Plan (Directors’ Savings Plan).Plan.
(3)Includes shares remaining available for issuance pursuant to stock awards under the Duke Energy Corporation 2015 Long-Term Incentive Plan.
(4)Includes shares that could be payable with respect to certain compensation deferred under the Executive Savings Plan or and the Directors' Savings Plan, each of which is a nonqualifiednon-qualified deferred compensation plan described in more detail below. Upon the acquisition of Piedmont Natural Gas Company, Inc., performance shares granted prior to such acquisition under the Piedmont Natural Gas Company, Inc. Incentive Compensation Plan were converted into restricted stock units payable in shares of Duke Energy common stock. As of December 31, 2017, 45,173 such restricted stock units were outstanding. Following the acquisition, no further stock awards were permitted to be granted under the Piedmont Natural Gas Company, Inc. Incentive Compensation Plan. These converted awards are not listed in the table above.
(5)The number of shares remaining available for future issuance under equity compensation plans not approved by security holders cannot be determined because it is based on the amount of future voluntary deferrals, if any, under the Executive Savings Plan and the Directors' Savings Plan.
Under the Executive Savings Plan, participants can elect to defer a portion of their base salary and short‑term incentive compensation. Participants also receive a company matching contribution in excess of the contribution limits prescribed by the Internal Revenue Code under the Duke Energy Retirement Savings Plan, which is the 401(k) plan in which employees are generally eligible to participate. In general, payments are made following termination of employment or death in the form of a lump sum or installments, as selected by the participant. Participants may direct the deemed investment of base salary deferrals, short-term incentive compensation deferrals and matching contributions among investment options available under the Duke Energy Retirement Savings Plan, including the Duke Energy Common Stock Fund. Participants may change their investment elections on a daily basis. Deferrals of equity awards are credited with earnings and losses based on the performance of the Duke Energy Common Stock Fund. The benefits payable under the plan are unfunded and subject to the claims of Duke Energy’s creditors.
Under the Directors’ Savings Plan, outside directors may elect to defer all or a portion of their annual compensation, generally consisting of retainers. Deferred amounts are credited to an unfunded account, the balance of which is adjusted for the performance of phantom investment options, including the Duke Energy common stock fund, as elected by the director, and generally are paid when the director terminates his or her service from the Board of Directors.

262


PART III

Duke Energy will provide additional information that is responsive to this Item 12 in its definitive proxy statement or in an amendment to this Annual Report not later than 120 days after the end of the fiscal year covered by this Annual Report. That information is incorporated in this Item 12 by reference.



OTHER INFORMATION


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE
 
Duke Energy will provide information that is responsive to this Item 13 in its definitive proxy statement or in an amendment to this Annual Report not later than 120 days after the end of the fiscal year covered by this Annual Report. That information is incorporated in this Item 13 by reference.
ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES
 
Deloitte & Touche LLP and the member firms of Deloitte Touche Tohmatsu and their respective affiliates (collectively, Deloitte) provided professional services to the Duke Energy Registrants. The following tables present the Deloitte fees for services rendered to the Duke Energy Registrants during 20172018 and 2016.2017.
Year Ended December 31, 2017  Year Ended December 31, 2018  
  Duke
   Duke
 Duke
 Duke
 Duke
    Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Types of Fees
                              
Audit Fees(a)
$13.6
 $4.7
 $5.6
 $3.1
 $2.4
 $0.8
 $1.4
 $0.8
$14.0
 $5.0
 $5.5
 $3.3
 $2.2
 $0.9
 $1.4
 $0.8
Audit-Related Fees(b)
0.2
 
 
 
 
 
 
 
0.4
 
 0.1
 
 0.1
 
 
 
Tax Fees(c)
1.7
 0.6
 0.1
 0.4
 
 0.1
 0.1
 0.1
0.6
 0.2
 0.2
 0.1
 0.1
 
 0.1
 0.1
Other Fees(d)
0.1
 
 
 
 
 
 
 

 
 
 
 
 
 
 
Total Fees$15.6
 $5.3
 $5.7
 $3.5
 $2.4
 $0.9
 $1.5
 $0.9
$15.0
 $5.2
 $5.8
 $3.4
 $2.4
 $0.9
 $1.5
 $0.9
Year Ended December 31, 2016Year Ended December 31, 2017  
  Duke
   Duke
 Duke
 Duke
 Duke
  Duke
   Duke
 Duke
 Duke
 Duke
  
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
Duke
 Energy
 Progress
 Energy
 Energy
 Energy
 Energy
  
(in millions)
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
Energy
 Carolinas
 Energy
 Progress
 Florida
 Ohio
 Indiana
 Piedmont
Types of Fees
                            
Audit Fees(a)
$13.6
 $4.8
 $5.2
 $3.0
 $2.2
 $0.8
 $1.4
$13.6
 $4.7
 $5.6
 $3.1
 $2.4
 $0.8
 $1.4
 $0.8
Audit-Related Fees(b)
0.7
 
 
 
 
 
 
0.2
 
 
 
 
 
 
 
Tax Fees(c)
0.4
 0.1
 0.1
 0.1
 
 
 0.1
1.7
 0.6
 0.1
 0.4
 
 0.1
 0.1
 0.1
Other Fees(d)
0.2
 0.1
 0.1
 0.1
 
 
 
0.1
 
 
 
 
 
 
 
Total Fees$14.9
 $5.0
 $5.4
 $3.2
 $2.2
 $0.8
 $1.5
$15.6
 $5.3
 $5.7
 $3.5
 $2.4
 $0.9
 $1.5
 $0.9
 
Piedmont(e)
 Two Months Ended
Year Ended October 31,
(in millions)  
December 31, 20162016
Types of Fees  
  
Audit Fees(a)
$0.6
$1.3
Audit-Related Fees(b)

0.1
Total Fees$0.6
$1.4
(a)Audit Fees are fees billed, or expected to be billed, by Deloitte for professional services for the financial statement audits, audit of the Duke Energy Registrants’ financial statements included in the Annual Report on Form 10-K, reviews of financial statements included in Quarterly Reports on Form 10‑Q, and services associated with securities filings such as comfort letters and consents.
(b)Audit-Related Fees are fees billed, or expected to be billed, by Deloitte for assurance and related services that are reasonably related to the performance of an audit or review of financial statements, including statutory reporting requirements.
(c)Tax Fees are fees billed by Deloitte for tax return assistance and preparation, tax examination assistance and professional services related to tax planning and tax strategy.
(d)Other Fees are billed by Deloitte for attendance at Deloitte-sponsored conferences and access to Deloitte research tools and subscription services. In 2016, Other Fees also included non-audit fees related to consulting services.
(e)Includes all accounting fees and services paid prior to and subsequent to the acquisition. Prior to the acquisition, Piedmont's Audit Committee preapproved all services provided by the independent auditor.


263


PART III

To safeguard the continued independence of the independent auditor, the Audit Committee of the Board of Directors (Audit Committee) of Duke Energy adopted a policy that all services provided by the independent auditor require preapproval by the Audit Committee. Pursuant to the policy, certain audit services, audit-related services, tax services and other services have been specifically preapproved up to fee limits. In the event the cost of any of these services may exceed the fee limits, the Audit Committee must specifically approve the service. All services performed in 20172018 and 20162017 by the independent accountant were approved by the Audit Committee pursuant to the preapproval policy.

264

EXHIBITS

PART IV

 
ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
(a)Consolidated Financial Statements, Supplemental Financial Data and Supplemental Schedules included in Part II of this annual reportAnnual Report are as follows:
Duke Energy Corporation
Consolidated Financial Statements
Consolidated Statements of Operations for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.
Duke Energy Carolinas, LLC
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.
Progress Energy, Inc.
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.
Duke Energy Progress, LLC
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.
Duke Energy Florida, LLC
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.

265

EXHIBITS

PART IV

Duke Energy Ohio, Inc.
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.
Duke Energy Indiana, LLC
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the Years Ended December 31, 2018, 2017 2016 and 20152016
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2018, 2017 2016 and 20152016
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.
Piedmont Natural Gas Company, Inc.
Consolidated Financial Statements
Consolidated Statements of Operations and Comprehensive Income for the YearYears Ended December 31, 2018, and 2017, Two Months Ended December 31, 2016, and the YearsYear Ended October 31, 2016 and 2015
Consolidated Balance Sheets as of December 31, 2017,2018, and 20162017
Consolidated Statements of Cash Flows for the YearYears Ended December 31, 2018, and 2017, Two Months Ended December 31, 2016, and the YearsYear Ended October 31, 2016 and 2015
Consolidated Statements of Changes in Equity for the YearYears Ended December 31, 2018, and 2017, Two Months Ended December 31, 2016, and the YearsYear Ended October 31, 2016 and 2015
Notes to the Consolidated Financial Statements
Quarterly Financial Data, (unaudited, included in Note 2526 to the Consolidated Financial Statements)
Report of Independent Registered Public Accounting Firm
All other schedules are omitted because they are not required, or because the required information is included in the Consolidated Financial Statements or Notes.



266

EXHIBITS

PART IV

EXHIBIT INDEX
Exhibits filed herewithin are designated by an asterisk (*). All exhibits not so designated are incorporated by reference to a prior filing, as indicated. Items constituting management contracts or compensatory plans or arrangements are designated by a double asterisk (**). The Company agrees to furnish upon request to the Commission a copy of any omitted schedules or exhibits upon request on all items designated by a triple asterisk (***).
    Duke   Duke Duke Duke Duke  
Exhibit Duke Energy Progress Energy Energy Energy Energy  
Number Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont
2.1X              
2.2X              
3.1X              
3.2X              
3.3  X            
3.3.1  X            
3.4          X    
3.4.1          X    
3.5            X  
3.5.1            X  
3.5.2            X  
3.5.3            X  
3.5.4            X  
3.6  X            
3.7          X    
3.8      X        
3.8.1      X        
3.8.2      X        
3.9    X          
3.9.1    X          
3.9.2    X          
3.9.3    X          
3.10        X      
3.10.1        
X 
      
3.10.2        X      
3.10.3        X      
3.11              X
3.11.1              X
4.1X              
4.1.1X              
4.1.2X              
4.1.3X              
4.1.4X              
4.1.5X              
4.1.6X              
4.1.7X              
4.1.8X              
4.1.9X              
4.1.10X              
4.1.11X              
4.1.12X              
4.1.13X              
4.1.14X              
4.1.15X              
4.1.16X              
4.1.17X              
4.1.18X
4.1.19

X
4.1.20X
4.2  X            
4.2.1  X            
4.2.2  X            
4.3First and Refunding Mortgage from Duke Energy Carolinas, LLC to The Bank of New York Mellon Trust Company, N.A., successor trustee to Guaranty Trust Company of New York, dated as of December 1, 1927, (incorporated by reference to Exhibit 7(a) to registrant's Form S-1, effective October 15, 1947, File No. 2-7224).  X            
4.3.1  X            
4.3.2Ninth Supplemental Indenture, dated as of February 1, 1949, (incorporated by reference to Exhibit 7(j) to registrant's Form S-1 filed on February 3, 1949, File No. 2-7808).  X            
4.3.3Twentieth Supplemental Indenture, dated as of June 15, 1964, (incorporated by reference to Exhibit 4-B-20 to registrant's Form S-1 filed on August 23, 1966, File No. 2-25367).  X            
4.3.4Twenty-third Supplemental Indenture, dated as of February 1, 1968, (incorporated by reference to Exhibit 2-B-26 to registrant's Form S-9 filed on January 21, 1969, File No. 2-31304).  X            
4.3.5Sixtieth Supplemental Indenture, dated as of March 1, 1990, (incorporated by reference to Exhibit 4-B-61 to registrant's Annual Report on Form 10-K for the year ended December 31, 1990, File No.1-4928).  X            
4.3.6Sixty-third Supplemental Indenture, dated as of July 1, 1991, (incorporated by reference to Exhibit 4-B-64 to registrant's Registration Statement on Form S-3 filed on February 13, 1992, File No. 33-45501). ��X            
4.3.7  X            
4.3.8  X            
4.3.9  X            
4.3.10  X            
4.3.11  X            
4.3.12  X            
4.3.13  X            
4.3.14  X            
4.3.15  X            
4.3.16  X            
4.3.17  X            
4.3.18  X            
4.3.19X
4.3.20  X            
4.4Mortgage and Deed of Trust between Duke Energy Progress, Inc. (formerly Carolina Power & Light Company) and The Bank of New York Mellon (formerly Irving Trust Company) and Frederick G. Herbst (Tina D. Gonzalez, successor), as Trustees, dated as of May 1, 1940.      X        
4.4.1First through Fifth Supplemental Indentures thereto (incorporated by reference to Exhibit 2(b), File No. 2-64189).      X        
4.4.2Sixth Supplemental Indenture dated April 1, 1960 (incorporated by reference to Exhibit 2(b)-5, File No. 2-16210).      X        
4.4.3Seventh Supplemental Indenture dated November 1, 1961 (incorporated by reference to Exhibit 2(b)-6, File No. 2-16210).      X        
4.4.4Eighth Supplemental Indenture dated July 1, 1964 (incorporated by reference to Exhibit 4(b)-8, File No. 2-19118).      X        
4.4.5Ninth Supplemental Indenture dated April 1, 1966 (incorporated by reference to Exhibit 4(b)-2, File No. 2-22439).      X        
4.4.6Tenth Supplemental Indenture dated October 1, 1967 (incorporated by reference to Exhibit 4(b)-2, File No. 2-24624).      X        
4.4.7Eleventh Supplemental Indenture dated October 1, 1968 (incorporated by reference to Exhibit 2(c), File No. 2-27297).      X        
4.4.8Twelfth Supplemental Indenture dated January 1, 1970 (incorporated by reference to Exhibit 2(c), File No. 2-30172).      X        
4.4.9Thirteenth Supplemental Indenture dated August 1, 1970 (incorporated by reference to Exhibit 2(c), File No. 2-35694).      X        
4.4.10Fourteenth Supplemental Indenture dated January 1, 1971 (incorporated by reference to Exhibit 2(c), File No. 2-37505).      X        
4.4.11Fifteenth Supplemental Indenture dated October 1, 1971 (incorporated by reference to Exhibit 2(c), File No. 2-39002).      X        
4.4.12Sixteenth Supplemental Indenture dated May 1, 1972 (incorporated by reference to Exhibit 2(c), File No. 2-41738).      X        
4.4.13Seventeenth Supplemental Indenture dated November 1, 1973 (incorporated by reference to Exhibit 2(c), File No. 2-43439).      X        
4.4.14Eighteenth Supplemental Indenture dated (incorporated by reference to Exhibit 2(c), File No. 2-47751).      X        
4.4.15Nineteenth Supplemental Indenture dated May 1, 1974 (incorporated by reference to Exhibit 2(c), File No. 2-49347).      X        
4.4.16Twentieth Supplemental Indenture dated December 1, 1974 (incorporated by reference to Exhibit 2(c), File No. 2-53113).      X        
4.4.17Twenty-first Supplemental Indenture dated April 15, 1975 (incorporated by reference to Exhibit 2(d), File No. 2-53113).      X        
4.4.18Twenty-second Supplemental Indenture dated October 1, 1977 (incorporated by reference to Exhibit 2(c), File No. 2-59511).      X        
4.4.19Twenty-third Supplemental Indenture dated June 1, 1978 (incorporated by reference to Exhibit 2(c), File No. 2-61611).      X        
4.4.20Twenty-fourth Supplemental Indenture dated May 15, 1979 (incorporated by reference to Exhibit 2(d), File No. 2-64189).      X        
4.4.21Twenty-fifth Supplemental Indenture dated November 1, 1979 (incorporated by reference to Exhibit 2(c), File No. 2-65514).      X        
4.4.22Twenty-sixth Supplemental Indenture dated November 1, 1979 (incorporated by reference to Exhibit 2(c), File No. 2-66851).      X        
4.4.23Twenty-seventh Supplemental Indenture dated April 1, 1980 (incorporated by reference to Exhibit 2 (d), File No. 2-66851).      X        
4.4.24Twenty-eighth Supplemental Indenture dated October 1, 1980 (incorporated by reference to Exhibit 4(b)-1, File No. 2-81299).      X        
4.4.25Twenty-ninth Supplemental Indenture dated October 1, 1980 (incorporated by reference to Exhibit 4(b)-2, File No. 2-81299).      X        
4.4.26Thirtieth Supplemental Indenture dated December 1, 1982 (incorporated by reference to Exhibit 4(b)- 3, File No. 2-81299).      X        
4.4.27Thirty-first Supplemental Indenture dated March 15, 1983 (incorporated by reference to Exhibit 4(c)-1, File No. 2-95505).      X        
4.4.28Thirty-second Supplemental Indenture dated March 15, 1983 (incorporated by reference to Exhibit 4(c)-2, File No. 2-95505).      X        
4.4.29Thirty-third Supplemental Indenture dated December 1, 1983 (incorporated by reference to Exhibit 4(c)-3, File No. 2-95505).      X        
4.4.30Thirty-fourth Supplemental Indenture dated December 15, 1983 (incorporated by reference to Exhibit 4(c)-4, File No. 2-95505).      X        
4.4.31Thirty-fifth Supplemental Indenture dated April 1, 1984 (incorporated by reference to Exhibit 4(c)-5, File No. 2-95505).      X        
4.4.32Thirty-sixth Supplemental Indenture dated June 1, 1984 (incorporated by reference to Exhibit 4(c)-6, File No. 2-95505).      X        
4.4.33Thirty-seventh Supplemental Indenture dated June 1, 1984 (incorporated by reference to Exhibit 4(c)-7, File No. 2-95505).      X        
4.4.34Thirty-eighth Supplemental Indenture dated June 1, 1984 (incorporated by reference to Exhibit 4(c)- 8, File No. 2-95505).      X        
4.4.35Thirty-ninth Supplemental Indenture dated April 1, 1985 (incorporated by reference to Exhibit 4(b), File No. 33-25560).      X        
4.4.36Fortieth Supplemental Indenture dated October 1, 1985 (incorporated by reference to Exhibit 4(c), File No. 33-25560).      X        
4.4.37Forty-first Supplemental Indenture dated March 1, 1986 (incorporated by reference to Exhibit 4(d), File No. 33-25560).      X        
4.4.38Forty-second Supplemental Indenture dated July 1, 1986 (incorporated by reference to Exhibit 4(e), File No. 33-25560).      X        
4.4.39Forty-third Supplemental Indenture dated January 1, 1987 (incorporated by reference to Exhibit 4(f), File No. 33-25560).      X        
4.4.40Forty-fourth Supplemental Indenture dated December 1, 1987 (incorporated by reference to Exhibit 4(g), File No. 33-25560).      X        
4.4.41Forty-fifth supplemental Indenture dated September 1, 1988 (incorporated by reference to Exhibit 4(h), File No. 33-25560).      X        
4.4.42Forty-sixth Supplemental Indenture dated April 1, 1989 (incorporated by reference to Exhibit 4(b), File No. 33-33431).      X        
4.4.43Forty-seventh Supplemental Indenture dated August 1, 1989 (incorporated by reference to Exhibit 4(c), File No. 33-33431).      X        
4.4.44Forty-eighth Supplemental Indenture dated November 15, 1990 (incorporated by reference to Exhibit 4(b), File No. 33-38298).      X        
4.4.45Forty-ninth Supplemental Indenture dated November 15, 1990 (incorporated by reference to Exhibit 4(c), File No. 33-38298).      X        
4.4.46Fiftieth Supplemental Indenture dated February 15, 1991 (incorporated by reference to Exhibit 4(h), File No. 33-42869).      X        
4.4.47Fifty-first Supplemental Indenture dated April 1, 1991 (incorporated by reference to Exhibit 4(i), File No. 33-42869).      X        
4.4.48Fifty-second Supplemental Indenture dated September 15, 1991(incorporated by reference to Exhibit 4(e), File No. 33-48607).      X        
4.4.49Fifty-third Supplemental Indenture dated January 1, 1992 (incorporated by reference to Exhibit 4(f), File No. 33-48607).      X        
4.4.50Fifty-fourth Supplemental Indenture dated April 15, 1992 (incorporated by reference to Exhibit 4 (g), File No. 33-48607).      X        
4.4.51Fifty-fifth Supplemental Indenture dated July 1, 1992 (incorporated by reference to Exhibit 4(e), File No. 33-55060).      X        
4.4.52Fifty-sixth Supplemental Indenture dated October 1, 1992 (incorporated by reference to Exhibit 4(f), File No. 33-55060).      X        
4.4.53Fifty-seventh Supplemental Indenture dated February 1, 1993 (incorporated by reference to Exhibit 4(e), File No. 33-60014).      X        
4.4.54Fifty-eighth Supplemental Indenture dated March 1, 1993 (incorporated by reference to Exhibit 4(f), File No. 33-60014).      X        
4.4.55Fifty-ninth Supplemental Indenture dated July 1, 1993 (incorporated by reference to Exhibit 4(a) to Post-Effective Amendment No. 1, File No. 33-38349).      X        
4.4.56Sixtieth Supplemental Indenture dated July 1, 1993 (incorporated by reference to Exhibit 4(b) to Post-Effective Amendment No. 1, File No. 33-38349).      X        
4.4.57Sixty-first Supplemental Indenture dated August 15, 1993 (incorporated by reference to Exhibit 4(e), File No. 33-50597).      X        
4.4.58      X        
4.4.59      X        
4.4.60      X        
4.4.61      X        
4.4.62      X        
4.4.63      X        
4.4.64      X        
4.4.65      X        
4.4.66      X        
4.4.67      X        
4.4.68      X        
4.4.69      X        
4.4.70      X        
4.4.71      X        
4.4.72      X        
4.4.73      X        
4.4.74      X        
4.4.75      X        
4.4.76      X        
4.4.77      X        
4.4.78      X        
4.4.79      X        
4.4.80      X        
4.4.81      X        
4.5      X        
4.6      X        
4.7Indenture (for First Mortgage Bonds) between Duke Energy Florida, Inc. (formerly Florida Power Corporation) and The Bank of New York Mellon (as successor to Guaranty Trust Company of New York and The Florida National Bank of Jacksonville), as Trustee, dated as of January 1, 1944, (incorporated by reference to Exhibit B-18 to registrant's Form A-2, File No. 2-5293).        X      
4.7.1Seventh Supplemental Indenture (incorporated by reference to Exhibit 4(b) to Duke Energy Florida, Inc.'s (formerly Florida Power Corporation) Registration Statement on Form S-3 filed on September 27, 1991, File No. 33-16788).        X      
4.7.2Eighth Supplemental Indenture (incorporated by reference to Exhibit 4(c) to Duke Energy Florida, Inc.'s (formerly Florida Power Corporation) Registration Statement on Form S-3 filed on September 27, 1991, File No. 33-16788).        X      
4.7.3Sixteenth Supplemental Indenture (incorporated by reference to Exhibit 4(d) to Duke Energy Florida, Inc.'s (formerly Florida Power Corporation) Registration Statement on Form S-3 filed on September 27, 1991, File No. 33-16788).        X      
4.7.4Twenty-ninth Supplemental Indenture (incorporated by reference to Exhibit 4(c) to Duke Energy Florida, Inc.'s (formerly Florida Power Corporation) Registration Statement on Form S-3 filed on September 17, 1982, File No. 2-79832).        X      
4.7.5        X      
4.7.6        X      
4.7.7               X          
4.7.8                X          
4.7.9                X          
4.7.10                X          
4.7.11                X          
4.7.12                X          
4.7.13                X          
4.7.14                X          
4.7.15                X          
4.7.16        X      
4.7.17

X
4.8                X          
4.8.1        X      
4.9                X          
4.10                    X      
4.10.1                    X      
4.10.2                    X      
4.11Original Indenture (First Mortgage Bonds) between Duke Energy Ohio, Inc. (formerly The Cincinnati Gas & Electric Company) and The Bank of New York Mellon Trust Company, N.A., as Successor Trustee, dated as of August 1, 1936, (incorporated by reference to an exhibit to registrant's Registration Statement No. 2-2374).                    X      
4.11.1                    X      
4.11.2                    X      
4.11.3          X    
4.11.4          X    
4.11.5X
4.12                        X  
4.12.1                        X  
4.12.2                        X  
4.12.3                        X  
4.12.4                        X  
4.13Original Indenture (First Mortgage Bonds) between Duke Energy Indiana, LLC (formerly PSI Energy, Inc.) and Deutsche Bank National Trust Company, as Successor Trustee, dated as of September 1, 1939, (filed as an exhibit in File No. 70-258).                        X  
4.13.1Tenth Supplemental Indenture, dated as of July 1, 1952, (filed as an exhibit in File No. 2-9687).                        X  
4.13.2Twenty-third Supplemental Indenture, dated as of January 1, 1977, (filed as an exhibit in File No. 2-57828).                        X  
4.13.3Twenty-fifth Supplemental Indenture, dated as of September 1, 1978, (filed as an exhibit in File No. 2-62543).                        X  
4.13.4Twenty-sixth Supplemental Indenture, dated as of September 1, 1978, (filed as an exhibit in File No. 2-62543).                ��       X  
4.13.5Thirtieth Supplemental Indenture, dated as of August 1, 1980, (filed as an exhibit in File No. 2-68562).                        X  
4.13.6Thirty-fifth Supplemental Indenture, dated as of March 30, 1984, (filed as an exhibit to registrant's Annual Report on Form 10-K for the year ended December 31, 1984, File No. 1-3543).                        X  
4.13.7Forty-sixth Supplemental Indenture, dated as of June 1, 1990, (filed as an exhibit to registrant's Annual Report on Form 10-K for the year ended December 31, 1991, File No. 1-3543).                        X  
4.13.8Forty-seventh Supplemental Indenture, dated as of July 15, 1991, (filed as an exhibit to registrant's Annual Report on Form 10-K for the year ended December 31, 1991, File No. 1-3543).                        X  
4.13.9Forty-eighth Supplemental Indenture, dated as of July 15, 1992, (filed as an exhibit to registrant's Annual Report on Form 10-K for the year ended December 31, 1992, File No. 1-3543).                        X  
4.13.10                        X  
4.13.11                        X  
4.13.12                        X  
4.13.13                        X  
4.13.14                        X  
4.13.15                        X  
4.13.16                        X  
4.13.17                        X  
4.13.18                        X  
4.13.19                        X  
4.13.20                        X  
4.13.21            X  
4.13.22            X  
4.14Repayment Agreement between Duke Energy Ohio, Inc. (formerly The Cincinnati Gas & Electric Company) and The Dayton Power and Light Company, dated as of December 23, 1992, (filed with registrant's Annual Report on Form 10-K for the year ended December 31, 1992, File No. 1-1232).                    X      
4.15                        X  
4.16                 ��      X  
4.17                        X  
4.18        X                  
4.19              X
4.20              X
4.21              X
4.22              X
4.23              X
4.24              X
4.25              X
4.26              X
4.26.1              X
4.26.2              X
4.26.3              X
4.26.4              X
4.26.5              X
4.26.6              X
4.27Medium-Term Note, Series A, dated as of October 6, 1993 (incorporated by reference to Exhibit 4.8 to registrant's Annual Report on Form 10-K for the year ended October 31, 1993, File No. 1-06196).              X
4.28              X
4.29              X
4.30              X
4.31              X
4.32              X
4.33              X
4.34              X
10.1**Directors’ Charitable Giving Program (incorporated by reference to Exhibit 10-P to Duke Energy Carolinas, LLC's Annual Report on Form 10-K for the year ended December 31, 1992, File No. 1-4928).X
10.1.1**X
10.1.2**X
10.1.3**X
10.210.1   X                      
10.310.2    X                      
10.410.3    X                      
10.5X
10.610.4              X
10.710.5              X
10.810.6   X                      
10.910.7              X
10.1010.8                        X  
10.1110.9X                          
10.1210.10X                          
10.13*10.11**X                          
10.1410.12X                      X  
10.15*10.13**X                          
10.1610.14X  X              X  X  
10.16.110.14.1X X   X X X X  
10.16.210.14.2X X   X X X X  
10.16.310.14.3X X   X X X X X
10.17*10.15**X                          
10.17.1*10.15.1**X                          
10.18*10.16**X              
10.19**10.16.1**X              
10.20**X
10.21*10.17**X              
10.22*10.18**X              
10.23*10.19**X              
*10.24*10.20**X              
10.25*10.21**X              
10.26*10.22**X              
10.23**10.27*X              
10.2810.24X                          
10.2910.25X                          
10.30*10.26**X                          
10.31*10.27**X                          
10.3210.28Purchase, Construction and Ownership Agreement, dated as of July 30, 1981, between Duke Energy Progress, Inc. (formerly Carolina Power & Light Company) and North Carolina Municipal Power Agency Number 3 and Exhibits, together with resolution, dated as of December 16, 1981, changing name to North Carolina Eastern Municipal Power Agency, amending letter, dated as of February 18, 1982, and amendment, dated as of February 24, 1982, (incorporated by reference to Exhibit 10(a) to registrant's File No. 33-25560).            X              
10.3310.29Operating and Fuel Agreement, dated as of July 30, 1981, between Duke Energy Progress, Inc. (formerly Carolina Power & Light Company) and North Carolina Municipal Power Agency Number 3 and Exhibits, together with resolution, dated as of December 16, 1981, changing name to North Carolina Eastern Municipal Power Agency, amending letters, dated as of August 21, 1981, and December 15, 1981, and amendment, dated as of February 24, 1982, (incorporated by reference to Exhibit 10(b) to registrant's File No. 33-25560).            X              
10.3410.30Power Coordination Agreement, dated as of July 30, 1981, between Duke Energy Progress, Inc. (formerly Carolina Power & Light Company) and North Carolina Municipal Power Agency Number 3 and Exhibits, together with resolution, dated as of December 16, 1981, changing name to North Carolina Eastern Municipal Power Agency and amending letter, dated as of January 29, 1982, (incorporated by reference to Exhibit 10(c) to registrant's File No. 33-25560).            X              
10.3510.31Amendment, dated as of December 16, 1982, to Purchase, Construction and Ownership Agreement, dated as of July 30, 1981, between Duke Energy Progress, Inc. (formerly Carolina Power & Light Company) and North Carolina Eastern Municipal Power Agency (incorporated by reference to Exhibit 10(d) to registrant's File No. 33-25560).            X              
10.36*10.32**        X                  
10.37**X
10.38**XXX
10.3910.33
Precedent and Related Agreements between Duke Energy Florida, Inc. (formerly Florida PowerCorporationPower Corporation d/b/a Progress Energy Florida, Inc. (“PEF”)), Southern Natural Gas Company, FloridaGasFlorida Gas Transmission Company (“FGT”), and BG LNG Services, LLC (“BG”), including:a) Precedent Agreement between Southern Natural Gas Company and PEF, dated as ofDecemberof December 2, 2004;b) Gas Sale and Purchase Contract between BG and PEF, dated as of December 1, 2004;c) Interim Firm Transportation Service Agreement by and between FGT and PEF, dated as ofDecemberof December 2, 2004;d) Letter Agreement between FGT and PEF, dated as of December 2, 2004, andFirmand Firm Transportation Service Agreement between FGT and PEF to be entered into upon satisfactionofsatisfaction of certain conditions precedent;e) Discount Agreement between FGT and PEF, dated as of December 2, 2004;f) Amendment to Gas Sale and Purchase Contract between BG and PEF, dated as of January 28,2005; andg)28, 2005; and g) Letter Agreement between FGT and PEF, dated as of January 31, 2005, (incorporated byreferenceby reference to Exhibit 10.1 to registrant's Current Report on Form 8-K/A filed on March 15, 2005, FileNos.File Nos. 1-15929 and 1-3274). (Portions of the exhibit have been omitted and filed separately with theSecuritiesthe Securities and Exchange Commission pursuant to a request for confidential treatment pursuant to Rule 24b-2 under the Securities Exchange Act of 1934, as amended.)
    X   X      
10.4010.34        X      X          
10.41*10.35**X                          
10.41.1*10.35.1**X              
10.42*10.36**X                          
10.43*10.37**X              
10.44*10.38**X              
10.44.110.38.1X              
10.4510.39X         X    
10.4610.40X     X        
10.4710.41X              
10.4810.42X              
10.4910.43X              
10.5010.44X              
10.5110.45X              
10.5210.46X              
10.5310.47X              
10.54*10.48**X              
10.55*10.49**X              
10.56**X
10.56.1**X
10.56.2**X
10.57*10.50**X              
10.57.1*10.50.1**X              
10.58*10.51**X              
10.59*10.52**X              
10.60*10.53**X              
10.61*10.54**X              
10.62X
10.62.1X
10.6310.55X              
10.6410.56              X
10.6510.56.1

X
10.57              X
10.6610.58              X
10.66.110.58.1              X
10.66.210.58.2              X
10.6710.59              X
10.6810.60X
*12.1X
*12.2X
*12.3X
*12.4X
*12.5X
*12.6X
*12.7X
*12.8              X
*21X                          
*23.1.1X                          
*23.1.2    X                      
*23.1.3            X              
*23.1.4                X          
*23.1.5                    X      
*23.1.6                        X  
*23.1.7              X
*24.1X                          
*24.2X                          
*31.1.1X                          
*31.1.2    X                      
*31.1.3        X                  
*31.1.4            X              
*31.1.5                X          
*31.1.6                    X      
*31.1.7                        X  
*31.1.8              X
*31.2.1X                          
*31.2.2    X                      
*31.2.3        X                  
*31.2.4            X              
*31.2.5                X          
*31.2.6                    X      
*31.2.7                        X  
*31.2.8              X
*32.1.1X                          
*32.1.2    X                      
*32.1.3        X                  
*32.1.4            X              
*32.1.5                X          
*32.1.6                    X      
*32.1.7                        X  
*32.1.8              X
*32.2.1X                          
*32.2.2    X                      
*32.2.3        X                  
*32.2.4            X              
*32.2.5                X          
*32.2.6                    X      
*32.2.7                        X  
*32.2.8              X
*101.INSXBRL Instance DocumentX  X  X  X  X  X  X X
*101.SCHXBRL Taxonomy Extension Schema DocumentX  X  X  X  X  X  X X
*101.CALXBRL Taxonomy Calculation Linkbase DocumentX  X  X  X  X  X  X X
*101.LABXBRL Taxonomy Label Linkbase DocumentX  X  X  X  X  X  X X
*101.PREXBRL Taxonomy Presentation Linkbase DocumentX  X  X  X  X  X  X X
*101.DEFXBRL Taxonomy Definition Linkbase DocumentX  X  X  X  X  X  X X
The total amount of securities of each respective registrant or its subsidiaries authorized under any instrument with respect to long-term debt not filed as an exhibit does not exceed 10 percent of the total assets of such registrant and its subsidiaries on a consolidated basis. Each registrant agrees, upon request of the SEC, to furnish copies of any or all of such instruments to it.



E-1

SIGNATURES

PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
DUKE ENERGY CORPORATION
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good
Chairman, President and Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
(i)/s/ LYNN J. GOOD 
 Lynn J. Good
 Chairman, President and Chief Executive Officer (Principal Executive Officer and Director)
  
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
  
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors: 
   
 Michael G. Browning*James B. Hyler, Jr.*
 
 Annette K. Clayton*William E. Kennard*
   
 Theodore F. Craver, Jr.*William E. Kennard*Marie McKee*
   
 Robert M. Davis*E. Marie McKee*Charles W. Moorman IV*
   
 Daniel R. DiMicco*Charles W. Moorman IV*Carlos A. Saladrigas*
   
 John H. Forsgren*Carlos A. Saladrigas*Thomas E. Skains*
   
 Lynn J. Good*ThomasWilliam E. Skains*Webster, Jr.*
   
 John T. Herron*William E. Webster, Jr.* 
Steven K. Young, by signing his name hereto, does hereby sign this document on behalf of the registrant and on behalf of each of the above-named persons previously indicated by asterisk (*) pursuant to a power of attorney duly executed by the registrant and such persons, filed with the Securities and Exchange Commission as an exhibit hereto.
   
 By:/s/ STEVEN K. YOUNG
 Attorney-In-FactAttorney-In-Fact
    
 Date: February 21, 201828, 2019



E-2

SIGNATURES

PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
DUKE ENERGY CAROLINAS, LLC
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good

Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
   
(i)/s/ LYNN J. GOOD 
 Lynn J. Good 
 Chief Executive Officer (Principal Executive Officer)
   
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young 
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
   
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs 
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors: 
   
 /s/ LYNN J. GOOD 
 Lynn J. Good 
   
 /s/ DHIAA M. JAMIL 
 Dhiaa M. Jamil 
   
 /s/ LLOYD M. YATES 
 Lloyd M. Yates 
Date: February 21, 201828, 2019



E-3

SIGNATURES

PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
PROGRESS ENERGY, INC.
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good

Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
   
(i)/s/ LYNN J. GOOD 
 Lynn J. Good 
 Chief Executive Officer (Principal Executive Officer)
   
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young 
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
   
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs 
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors: 
   
 /s/ LYNN J. GOOD 
 Lynn J. Good 
   
 /s/ JULIA S. JANSON 
 Julia S. Janson 
Date: February 28, 2019



SIGNATURES 
Date: February 21, 2018

E-4


PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
DUKE ENERGY PROGRESS, LLC
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good

Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
(i)/s/ LYNN J. GOOD 
 Lynn J. Good 
 Chief Executive Officer (Principal Executive Officer)
   
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young 
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
   
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs 
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors: 
   
 /s/ DOUGLAS F ESAMANN 
 Douglas F Esamann 
   
 /s/ LYNN J. GOOD 
 Lynn J. Good 
   
 /s/ DHIAA M. JAMIL 
 Dhiaa M. Jamil 
   
 /s/ JULIA S. JANSON 
 Julia S. Janson 
   
 /s/ LLOYD M. YATES 
 Lloyd M. Yates 
Date: February 21, 201828, 2019



E-5

SIGNATURES

PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
DUKE ENERGY FLORIDA, LLC
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good

Chief Executive Officer
 
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
   
(i)/s/ LYNN J. GOOD 
 Lynn J. Good 
 Chief Executive Officer (Principal Executive Officer)
   
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young 
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
   
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs 
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors: 
   
 /s/ DOUGLAS F ESAMANN 
 Douglas F Esamann 
   
 /s/ LYNN J. GOOD 
 Lynn J. Good 
   
 /s/ DHIAA M. JAMIL 
 Dhiaa M. Jamil 
   
 /s/ JULIA S. JANSON 
 Julia S. Janson 
   
 /s/ LLOYD M. YATES 
 Lloyd M. Yates 
Date: February 21, 201828, 2019



E-6

SIGNATURES

PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
DUKE ENERGY OHIO, INC.
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good

Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
(i)/s/ LYNN J. GOOD
Lynn J. Good
Chief Executive Officer (Principal Executive Officer)
(ii)/s/ STEVEN K. YOUNG 
Steven K. Young
Executive Vice President and Chief Financial Officer (Principal Financial Officer)
(iii)/s/ WILLIAM E. CURRENS JR.
William E. Currens Jr.
Senior Vice President, Chief Accounting Officer and Controller (Principal Accounting Officer)
(iv)Directors:
/s/ DOUGLAS F ESAMANN
Douglas F Esamann
/s/ LYNN J. GOOD
Lynn J. Good
/s/ DHIAA M. JAMIL
Dhiaa M. Jamil
Date: February 21, 2018

E-7


PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 2018
DUKE ENERGY INDIANA, LLC
(Registrant)
By:/s/ LYNN J. GOOD
Lynn J. Good
Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
   
(i)/s/ LYNN J. GOOD 
 Lynn J. Good 
 Chief Executive Officer (Principal Executive Officer)
   
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young 
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
   
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs 
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors:
/s/ MELODY BIRMINGHAM-BYRD
Melody Birmingham-Byrd 
   
 /s/ DOUGLAS F ESAMANN 
 Douglas F Esamann 
   
 /s/ KELLEY A. KARNLYNN J. GOOD 
 Kelley A. KarnLynn J. Good
/s/ DHIAA M. JAMIL
Dhiaa M. Jamil 
Date: February 21, 201828, 2019














E-8

SIGNATURES

PART IV

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 21, 201828, 2019
 
PIEDMONT NATURAL GAS COMPANY, INC.DUKE ENERGY INDIANA, LLC
(Registrant)
 
 By:/s/ LYNN J. GOOD
   
Lynn J. Good

Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
   
(i)/s/ LYNN J. GOOD 
 Lynn J. Good 
 Chief Executive Officer (Principal Executive Officer)
   
(ii)/s/ STEVEN K. YOUNG 
 Steven K. Young 
 Executive Vice President and Chief Financial Officer (Principal Financial Officer)
   
(iii)/s/ WILLIAM E. CURRENS JR.DWIGHT L. JACOBS 
 William E. Currens Jr.Dwight L. Jacobs 
 Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
(iv)Directors:
/s/ DOUGLAS F ESAMANN
Douglas F Esamann
/s/ KELLEY A. KARN
Kelley A. Karn
/s/ STAN PINEGAR
Stan Pinegar
Date: February 28, 2019



SIGNATURES


SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: February 28, 2019
PIEDMONT NATURAL GAS COMPANY, INC.
(Registrant)
By:/s/ LYNN J. GOOD
Lynn J. Good
Chief Executive Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.
(i)/s/ LYNN J. GOOD
Lynn J. Good
Chief Executive Officer (Principal Executive Officer)
(ii)/s/ STEVEN K. YOUNG
Steven K. Young
Executive Vice President and Chief Financial Officer (Principal Financial Officer)
(iii)/s/ DWIGHT L. JACOBS
Dwight L. Jacobs
Senior Vice President, Chief Accounting Officer, Tax and Controller (Principal Accounting Officer)
   
(iv)Directors: 
   
 /s/ LYNN J. GOOD 
 Lynn J. Good 
   
 /s/ DHIAA M. JAMIL
Dhiaa M. Jamil
/s/ FRANKLIN H. YOHO 
 Franklin H. Yoho 
/s/ DHIAA M. JAMIL
Dhiaa M. Jamil
Date: February 21, 201828, 2019


E-9