UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
(Mark One)
þANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 For the fiscal year ended December 31, 20162017
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 For the transition period from                        to
Commission
File Number
 
Exact Name of Registrant
as specified in its charter
 
State or Other Jurisdiction of
Incorporation or Organization
 
IRS Employer
Identification Number
1-9936 EDISON INTERNATIONAL California 95-4137452
1-2313 SOUTHERN CALIFORNIA EDISON COMPANY California 95-1240335
EDISON INTERNATIONAL SOUTHERN CALIFORNIA EDISON COMPANY
2244 Walnut Grove Avenue
(P.O. Box 976)
Rosemead, California 91770
(Address of principal executive offices)
 
2244 Walnut Grove Avenue
(P.O. Box 800)
Rosemead, California 91770
(Address of principal executive offices)
(626) 302-2222
(Registrant's telephone number, including area code)
 
(626) 302-1212
(Registrant's telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of each class Name of each exchange on which registered
Edison International: Common Stock, no par value
 NYSE LLC
Southern California Edison Company: Cumulative Preferred Stock
 NYSE MKTAmerican LLC
4.08% Series, 4.24% Series, 4.32% Series, 4.78% Series  
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 Act.
Edison International        Yes þ No o    Southern California Edison Company        Yes þ No o
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.
Edison International        Yes o No þ    Southern California Edison Company        Yes o No þ
Indicate by check mark whether the registrant (1) has 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.
Edison International        Yes þ No o    Southern California Edison Company        Yes þ No o
Indicate by check mark whether the registrant has submitted electronically and posted on its 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).
Edison International        Yes þ No o    Southern California Edison Company        Yes þ No o
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.
Edison International         þ        Southern California Edison Company         þ
Indicate by check mark whether the registrant 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 "accelerated filer," "large accelerated filer," andaccelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-12 of the Exchange Act. (Check One):
Edison International
Large Accelerated Filer þ
Accelerated Filer o
Non-accelerated Filer o
Smaller Reporting Company o
Emerging growth company o
Southern California Edison Company
Large Accelerated Filer o
Accelerated Filer o
Non-accelerated Filer þ
Smaller Reporting Company o
Emerging growth company o
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.
                 Edison Internationalo                        Southern California Edison Companyo
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Edison International        Yes o No þ    Southern California Edison Company        Yes o No þ
Aggregate market value of voting and non-voting common equity held by non-affiliates of the registrants as of June 30, 2016,2017, the last business day of the most recently completed second fiscal quarter:
Edison International    Approximately $25.3$25.5 billion    Southern California Edison Company    Wholly owned by Edison International
Common Stock outstanding as of February 17, 2017:20, 2018:  
Edison International 325,811,206 shares
Southern California Edison Company 434,888,104 shares (wholly owned by Edison International)
DOCUMENTS INCORPORATED BY REFERENCE
Designated portions of the Proxy Statement relating to registrants' joint 2017 Annual Meeting of Shareholders have been incorporated by reference into the parts of this report where indicated.
   
   





TABLE OF CONTENTS
     SEC Form 10-K Reference Number
 
 
Part II, Item 7
 
  
 
 
 
 
 
  
   
   
   
   
 
 
  
 
 
  
   
 
 


i



  
 
  
 
  
  
 
  
  
  
 
  
  
  
  
  
 
Part I, Item 1A
 
 
 
Part II, Item 7A
Part II, Item 8
 


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Part II, Item 7A
Part II, Item 8
 
 
  
  
  
  
  
  
  
  
 
Part II, Item 6
Part II, Item 9A
Part II, Item 9B
Part II, Item 9
Part I, Item 1
 


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Part II, Item 6
Part II, Item 9A
Part II, Item 9B
Part II, Item 9
Part I, Item 1
 
 
  


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Part I, Item 1B
Part I, Item 2
Part I, Item 3
Part I,III, Item 310
Part I,III, Item 310
Part III, Item 10
Part III, Item 11
Part III, Item 12
Part III, Item 13
Part III, Item 14
Part II, Item 5
  
  
  
Part IV, Item 15
 
 
 
 
This is a combined Form 10-K separately filed by Edison International and Southern California Edison Company. Information contained herein relating to an individual company is filed by such company on its own behalf. Each company makes representations only as to itself and makes no other representation whatsoever as to any other company.


ivv



GLOSSARY
The following terms and abbreviations appearing in the text of this report have the meanings indicated below.
AFUDC allowance for funds used during construction
ALJ administrative law judge
ARO(s) asset retirement obligation(s)
Bcf billion cubic feet
Bonusbonus depreciation Current federal tax deduction of a percentage of the qualifying property placed in service during periods permitted under tax laws 
BRRBA Base Revenue Requirement Balancing Account
CAISO California Independent System Operator
Cal FireCalifornia Department of Forestry and Fire Protection
CCAsCommunity Choice Aggregators which are cities, counties, and certain other public agencies with the authority to generate and/or purchase electricity for their local residents and businesses
CPUC California Public Utilities Commission
DOE U.S. Department of Energy
DERs distributed energy resources
DRP Distributed Resources Plan
Edison Energy Edison Energy, LLC, a wholly-owned subsidiary of Edison Energy Group that advises and provides energy solutions to large energy users
Edison Energy Group Edison Energy Group, Inc., the holding company for subsidiaries engaged in competitive businesses focused on providing energy services, including distributed generation and/or storage, to commercial and industrial customers
EME Edison Mission Energy
EME Settlement Agreement Settlement Agreement by and among Edison Mission Energy, Edison International and the Consenting Noteholders identified therein, dated February 18, 2014
EMGEdison Mission Group Inc., a wholly owned subsidiary of Edison International and the parent company of EME and Edison Capital
ERRA energy resource recovery accountEnergy Resource Recovery Account
FASBFinancial Accounting Standards Board
FERC Federal Energy Regulatory Commission
GAAP generally accepted accounting principles
GHG greenhouse gas
GRC general rate case
GWh gigawatt-hours
HLBV hypothetical liquidation at book value
IRS Internal Revenue Service
Joint Proxy Statement Edison International's and SCE's definitive Proxy Statement to be filed with the SEC in connection with Edison International's and SCE's Annual Shareholders' Meeting to be held on April 27, 201726, 2018
MD&A 
Management's Discussion and Analysis of Financial Condition and Results
of Operations in this report
MHI Mitsubishi Heavy Industries, Inc. and related companies
MW megawatts
MWdc megawatts measured for solar projects representing the accumulated peak capacity of all the solar modules
NDCTPNuclear Decommissioning Cost Triennial Proceeding
NEIL Nuclear Electric Insurance Limited
NEM net energy metering
NERC North American Electric Reliability Corporation
NOLnet operating loss
NRC Nuclear Regulatory Commission
ORA CPUC's Office of Ratepayers Advocates


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OII Order Instituting Investigation
OII PartiesSCE, SDG&E, The Alliance for Nuclear Responsibility, The California Large Energy Consumers Association, California State University, Citizens Oversight dba Coalition to Decommission San Onofre, the Coalition of California Utility Employees, the Direct Access Customer Coalition, Ruth Henricks, ORA, TURN, and Women's Energy Matters, all of whom are parties to the Revised San Onofre Settlement Agreement
Palo Verde 
nuclear electric generating facility located near
Phoenix, Arizona in which SCE holds a 15.8% ownership interest
PBOP(s) postretirement benefits other than pension(s)
QF(s)Prior San Onofre Settlement Agreement qualifying facility(ies)


v



San Onofre OII Settlement Agreement by and among TURN, ORA, SDG&E, the Coalition of California Utility Employees, and Friends of the Earth, dated November 20, 2014
ROE return on common equity
Revised
San Onofre
Settlement Agreement
Revised San Onofre OII Settlement Agreement among OII Parties, dated January 30, 2018
S&P Standard & Poor's Ratings Services
San Onofre 
retired nuclear generating facility located in south
San Clemente, California in which SCE holds a 78.21% ownership interest
San Onofre OII Settlement AgreementSettlement Agreement by and among TURN, ORA, SDG&E, the Coalition of California Utility Employees, and Friends of the Earth, dated November 20, 2014
SCE Southern California Edison Company
SDG&E San Diego Gas & Electric
SEC U.S. Securities and Exchange Commission
SED Safety and Enforcement Division of the CPUC formerly known as the Consumer Protection and Safety Division or CPSD
SoCalGas Southern California Gas Company
SoCore Energy SoCore Energy LLC, a subsidiary of Edison Energy Group that provides solar energy and energy storage solutions
TAMATax Accounting Memorandum Account
Tax ReformTax Cuts and Jobs Act signed into law on December 22, 2017
TURN The Utility Reform Network
US EPA U.S. Environmental Protection Agency



vivii



FORWARD-LOOKING STATEMENTS
This Annual Report on Form 10-K contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect Edison International's and SCE's current expectations and projections about future events based on Edison International's and SCE's knowledge of present facts and circumstances and assumptions about future events and include any statements that do not directly relate to a historical or current fact. Other information distributed by Edison International and SCE that is incorporated in this report, or that refers to or incorporates this report, may also contain forward-looking statements. In this report and elsewhere, the words "expects," "believes," "anticipates," "estimates," "projects," "intends," "plans," "probable," "may," "will," "could," "would," "should," and variations of such words and similar expressions, or discussions of strategy or plans, are intended to identify forward-looking statements. Such statements necessarily involve risks and uncertainties that could cause actual results to differ materially from those anticipated. Some of the risks, uncertainties and other important factors that could cause results to differ from those currently expected, or that otherwise could impact Edison International and SCE, include, but are not limited to the:
ability of SCE to recover its costs in a timely manner from its customers through regulated rates, including costs related to San Onofre, uninsured wildfire-related liabilities, and proposed spending on grid modernization;
ability to obtain sufficient insurance at a reasonable cost, including insurance relating to SCE's nuclear facilities and wildfire-related exposure, and to recover the costs of such insurance or, in the absence of insurance, the ability to recover uninsured losses;
decisions and other actions by the CPUC, the FERC, the NRC and other regulatory authorities, including determinations of authorized rates of return or return on equity, approvalthe 2018 GRC, the recoverability of proposed spending on grid modernization, outcome of San Onofre CPUC proceedings,wildfire-related costs, and delays in regulatory actions;
ability of Edison International or SCE to borrow funds and access the capital markets on reasonable terms;
risks associated with the decommissioning of San Onofre, including those related to public opposition, permitting, governmental approvals, on-site storage of spent nuclear fuel, and cost overruns;
extreme weather-related incidents and other natural disasters, including earthquakes and events caused, or exacerbated, by climate change, such as wildfires;
risks associated with cost allocation including the potential movementresulting in higher rates for utility bundled service customers because of costs to certain customers, caused by the ability of cities, counties and certain other public agencies to generate and/or purchase electricity for their local residents and businesses, along with other possible customer bypass or departure due to increased adoption of distributed energy resources ("DERs") or technological advancements in the generation, storage, transmission, distribution and use of electricity, and supported by public policy, government regulations and incentives;CCAs;
risks inherent in the construction of SCE's transmission and distribution infrastructure investment program, including those related to project site identification, public opposition, environmental mitigation, construction, permitting, power curtailment costs (payments due under power contracts in the event there is insufficient transmission to enable acceptance of power delivery), changes in the CAISO's transmission plans, and governmental approvals;
risks associated with the operation of transmission and distribution assets and power generating facilities, including:including public safety issues, failure, availability, efficiency, and output of equipment and availability and cost of spare parts;
risks associated with the decommissioning of San Onofre, including those related to public opposition, permitting, governmental approvals, and cost overruns;
physical security of Edison International's and SCE's critical assets and personnel and the cybersecurity of Edison International's and SCE's critical information technology systems for grid control, and business and customer data;
ability of Edison International to develop Edison Energy Group,competitive businesses, manage new business risks, and recover and earn a return on its investment in newly developed or acquired businesses;
cost and availability of electricity, including the ability to procure sufficient resources to meet expected customer needs in the event of power plant outages or significant counterparty defaults under power-purchase agreements;
environmental laws and regulations, at both the state and federal levels, or changes in the application of those laws, that could require additional expenditures or otherwise affect the cost and manner of doing business;
changes in tax laws and regulations, at both the state and federal levels, or changes in the application of those laws;laws, that could affect recorded deferred tax assets and liabilities and effective tax rate;
changes in the fair value of investments and other assets;
changes in interest rates and rates of inflation, including escalation rates, which may be adjusted by public utility regulators;
governmental, statutory, regulatory, or administrative changes or initiatives affecting the electricity industry, including the market structure rules applicable to each market adopted by the NERC, CAISO, WECCWestern Electricity Council, and similar regulatory bodies in adjoining regions;


availability and creditworthiness of counterparties and the resulting effects on liquidity in the power and fuel markets and/or the ability of counterparties to pay amounts owed in excess of collateral provided in support of their obligations;
cost and availability of labor, equipment and materials;
ability to obtain sufficient insurance, including insurance relating to SCE's nuclear facilities and wildfire-related liability, and to recover the costs of such insurance or in the absence of insurance the ability to recover uninsured losses;
potential for penalties or disallowance for non-compliance with applicable laws and regulations;
cost of fuel for generating facilities and related transportation, which could be impacted by, among other things, disruption of natural gas storage facilities, to the extent not recovered through regulated rate cost escalation provisions or balancing accounts; and
disruption of natural gas supply due to unavailability of storage facilities, which could lead to electricity service interruptions; and
weather conditions and natural disasters.interruptions.
See "Risk Factors" in this report for additional information on risks and uncertainties that could cause results to differ from those currently expected or that otherwise could impact Edison International, SCE or their subsidiaries.
Additional information about risks and uncertainties, including more detail about the factors described in this report, is contained throughout this report. Readers are urged to read this entire report, including information incorporated by reference, and carefully consider the risk, uncertainties and other factors that affect Edison International's and SCE's businesses. Forward-looking statements speak only as of the date they are made and neither Edison International nor SCE are obligated to publicly update or revise forward-looking statements. Readers should review future reports filed by Edison International and SCE with the SEC. Edison International and SCE provide direct links to SCE'scertain SCE regulatory filings with the CPUC and the FERC and certain agency rulings and notices in open proceedings most important to investors at www.edisoninvestor.com (SCE Regulatory Highlights) so that such filings are available to all investors. Edison International and SCE also routinely post or provide direct links to presentations, documents and other information that may be of interest to investors upon SCE filing with the relevant agency.at www.edisoninvestor.com (Events and Presentations) in order to publicly disseminate such information.
Except when otherwise stated, references to each of Edison International, SCE, EMG,Edison Mission Group, Inc., Edison Energy Group, EME or Edison Capital mean each such company with its subsidiaries on a consolidated basis. References to "Edison International Parent and Other" mean Edison International Parent and its consolidated competitive subsidiaries.


MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
MANAGEMENT OVERVIEW
Highlights of Operating Results
Edison International is the parent holding company of SCE.SCE and Edison Energy Group. SCE is aan investor-owned public utility primarily engaged in the business of supplying and delivering electricity to an approximately 50,000 square mile area of southern California. Edison International is also the parent company of Edison Energy Group is a holding company for subsidiaries engaged in pursuing competitive business opportunities across energy services, managed portfolio solutions, and distributed solar solutions to commercial and industrial customers. SuchEdison Energy Group's business activities are currently not material to report as a separate business segment. References to Edison International refer to the consolidated group of Edison International and its subsidiaries. References to Edison International Parent and Other refer to Edison International Parent and its competitive subsidiaries. Unless otherwise described, all of the information contained in this annual report relates to both filers.
(in millions)2016 2015 2016 vs 2015 Change 20142017 2016 2017 vs 2016 Change 2015
Net income (loss) attributable to Edison International              
Continuing operations              
SCE$1,376
 $998
 $378
 $1,453
$1,012
 $1,376
 $(364) $998
Edison International Parent and Other(77) (13) (64) (26)(447) (77) (370) (13)
Discontinued operations12
 35
 (23) 185

 12
 (12) 35
Edison International1,311
 1,020
 291
 1,612
565
 1,311
 (746) 1,020
Less: Non-core items              
SCE              
Write-down, impairment and other charges
 (382) 382
 (72)(448) 
 (448) (382)
NEIL insurance recoveries
 12
 (12) 

 
 
 12
Re-measurement of deferred taxes(33) 
 (33) 
Edison International Parent and Other              
Re-measurement of deferred taxes(433) 
 (433) 
Edison Capital sale of affordable housing portfolio
 10
 (10) 

 
 
 10
Income from allocation of losses to tax equity investor5
 9
 (4) 2
13
 5
 8
 9
Discontinued operations12
 35
 (23) 185

 12
 (12) 35
Total non-core items17
 (316) 333
 115
(901) 17
 (918) (316)
Core earnings (losses)              
SCE1,376
 1,368
 8
 1,525
1,493
 1,376
 117
 1,368
Edison International Parent and Other(82) (32) (50) (28)(27) (82) 55
 (32)
Edison International$1,294
 $1,336
 $(42) $1,497
$1,466
 $1,294
 $172
 $1,336
Edison International's earnings are prepared in accordance with GAAP used in the United States.GAAP. Management uses core earnings internally for financial planning and for analysis of performance. Core earnings (losses) are also used when communicating with investors and analysts regarding Edison International's earnings results to facilitate comparisons of the Company'scompany's performance from period to period. Core earnings (losses) are a non-GAAP financial measure and may not be comparable to those of other companies. Core earnings (losses) are defined as earnings attributable to Edison International shareholders less non-core items. Non-core items include income or loss from discontinued operations, income resulting from allocation of losses to tax equity investorinvestors under the HLBV accounting method and income or loss from significant discrete items that management does not consider representative of ongoing earnings, such as: exit activities, including sale of certain assets and other activities that are no longer continuing,as write downs, asset impairments and other gains and losses related to certain tax, regulatory or legal settlements or proceedings.proceedings, and exit activities, including sale of certain assets and other activities that are no longer continuing.
Edison International's 20162017 earnings increased $291decreased $746 million, driven by an increasea decrease in SCE's earnings of $378$364 million partially offset by increased costs atand a decrease in Edison International Parent and Other earnings of $370 million and lower income from discontinued operations. SCE's increasedlower net income consisted of $8$481 million of higher core earningsnon-core losses, mainly the result of the Revised San Onofre

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Settlement Agreement, and $370$117 million of higher non-corecore earnings. The increase in core earnings was due to an increase in revenue from the escalation mechanism set forth in the 2015 GRC decision and lower operationsoperation and maintenance expenses, partially offset by higher net financing costs and tax expense.

3




costs.
Edison International Parent and Other resultslosses from continuing operations for 20162017 consisted of $50$55 million of lower core losses and $425 million of higher non-core losses. The decrease in core losses and $14 million of lower non-core earnings. During 2016, Edison International Parent and Other recorded an after-tax charge of $13 millionin 2017 was due to higher income tax benefits related to stock option exercises, net operating loss carrybacks from the buy-outfiling of an earn-out provision with the former shareholders2016 tax returns in 2017, the 2017 settlement of a company acquired byfederal income tax audits for 2007 – 2012 and higher Edison Energy at the end of 2015. The buy-out was completed, together with modification to employment contracts, in order to align long-term incentive compensation. In addition, core losses for 2016 included higherGroup operating and development costs and lower revenue and gross margin from the sale of solar systems at Edison Energy Group. Results during 2015 included income from Edison Capital's investments in affordable housing projects, which were sold at the end of 2015.revenue.
Consolidated non-core items for 2017, 2016 and 2015 for Edison International included:
SCE's write-downImpairment and other charges of $382$716 million ($448 million after-tax) in 2017 related to the Revised San Onofre Settlement Agreement. For further information, see "—Permanent Retirement of San Onofre" below.
Charges of $433 million in 2015 of regulatory assets previously recorded2017 for recoveryEdison International Parent and Other and $33 million for SCE from the re-measurement of deferred income taxes from 2012 – 2014 incremental tax repair deductions.as a result of the Tax Cuts and Jobs Act ("Tax Reform"). For further information see "— Tax Reform" below.
Income of $20$21 million ($1213 million after-tax) in 2015 at SCE related to shareholder's portion of NEIL insurance recoveries arising from the outage, $9 million ($5 million after-tax) and shutdown of the San Onofre Units 2 and 3 generating stations and the recovery of legal costs.
Income of $16 million ($109 million after-tax) in 2015 related to completion of the sale of Edison Capital's affordable housing investment portfolio which represented the exit from this business activity.
Income of $5 million and $9 million for 2017, 2016 and 2015, respectively, related to losses (net of distributions) allocated to tax equity investors under the HLBV accounting method. Edison International reflected in core earnings reflected the operating results of the solar projects, related financings and the priority return to the tax equity investor. The losses allocated to the tax equity investor under HLBV accounting method results in income allocated to subsidiaries of Edison International, neither of which is due to the operating performance of the projects but rather due to the allocation of income tax attributes under the tax equity financing. Accordingly, Edison International has included the non-operating allocation of income as a non-core item. For further information on HLBV, see "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies."
Income from discontinued operations net of tax, was $12$1 million ($12 million after-tax) and $35$15 million ($35 million after-tax) for 2016 and 2015, respectively, which was primarily related to the resolution of tax issues related to EME. The discontinued operations from 2015 also reflects proceeds from insurance recoveries related to EME. See "Notes to Consolidated Financial Statements—Note 7. Income Taxes" for further information.
Tax expense of $382 million in 2015 related to the write-down of regulatory assets previously recorded for recovery of deferred income taxes from 2012 – 2014 incremental tax repair deductions resulting from the 2015 GRC decision.
Income of $20 million ($12 million after-tax) in 2015 at SCE related to shareholder's portion of NEIL insurance recoveries arising from the outage and shutdown of the San Onofre Units 2 and 3 generating stations and the recovery of legal costs.
Income of $16 million ($10 million after-tax) in 2015 related to completion of the sale of Edison Capital's affordable housing investment portfolio which represented the exit from this business activity.
See "Results of Operations" for discussion of SCE and Edison International Parent and Other results of operations, including a comparison of 2015 results to 2014.operations.
Electricity Industry TrendsSouthern California Wildfires
In December 2017, several wind-driven wildfires (the "December 2017 Wildfires") impacted portions of SCE's service territory and caused substantial damage to both residential and business properties and service outages for SCE customers. The largest of these fires, known as the Thomas Fire, originated in Ventura County and burned acreage located in both Ventura and Santa Barbara Counties. According to the most recent California Department of Forestry and Fire Protection ("Cal Fire") incident information reports, the Thomas Fire burned over 280,000 acres, destroyed an estimated 1,063 structures, damaged an estimated 280 structures and resulted in two fatalities. During 2017, SCE incurred approximately $35 million of capital expenditures related to restoration of service resulting from the December 2017 Wildfires.
The electric power industry is undergoing transformative change driven by technological advancements such as customer-owned generation and energy storage, which could alter the nature of energy generation and delivery. California's environmental policy objectives are accelerating the pace and scopecauses of the industry change. The electric grid is a critical enablerDecember 2017 Wildfires are being investigated by Cal Fire and other fire agencies. SCE believes the investigations include the possible role of SCE's facilities. SCE expects that one or more of the adoption of new energy technologies that support California's climate changefire agencies will ultimately issue reports concerning the origins and GHG reduction objectives, which continue to be publicly supported by California policy makers notwithstanding a potential change in the federal approach to such matters. The grid is also key to enabling more customer choices with respect to new energy technologies. The transformative change taking place in the electric power industry is integral to Edison International's strategy.
SCE plans to be a key enablercauses of the adoption of new energy technologies that benefit customers ofDecember 2017 Wildfires but cannot predict when these reports will be released or if any findings will be issued before the electric grid while also helping the state of California achieve its environmental goals. SCE expects to achieve these objectives through modernizing the electric grid to improve the safety and reliability of the transmission and distribution network and enabling increased penetration of DERs. SCE's ongoing focus to drive operational and service excellence should allow it to achieve these objectives while controlling costs and customer rates. SCE's focus on the transmission and distribution side of the utility business aligns with California's policy supporting competitive power markets. It also represents a lower risk than investment in conventional, natural gas-fired generation, which faces potentially stricter GHG limits as well as the increasing competitiveness of renewable resource fueled generation. For more information on the distribution grid development, see "—Capital Program—Distribution Grid Development" below.investigations are completed.

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ChangesAny potential liability of SCE for December 2017 Wildfire-related damages will depend on a number of factors, including whether SCE is determined to have substantially caused, or contributed to, the damages and whether parties seeking recovery of damages will be required to show negligence in addition to causation. Certain California courts have previously found utilities to be strictly liable for property damage, regardless of fault, by applying the electric power industry are impacting customers and jurisdictions outside California as well. Edison International believestheory of inverse condemnation when a utility's facilities were determined to be a substantial cause of a wildfire that other states will also pursue climate change and GHG reduction objectives, even ifcaused the federal approach to such objectives changes, and large commercial and industrial customers will continue to pursue cost reduction and sustainability goals. Edison Energy Group provides energy services to large commercial and industrial customers who may be impactedproperty damage. The rationale stated by these changes. Edison Energy Group seekscourts for applying this theory to provide advice in dealing with increasingly complex tariff and technology choices in order to support customers and their management of energy costs and risks.
Capital Program
Total capital expenditures (including accruals), were $3.5 billion in 2016. SCE's year-end rate base was $25.9 billion at December 31, 2016 compared to $24.6 billion at December 31, 2015.
To supportinvestor-owned utilities is that property losses resulting from a safe and reliable transmission and distribution network, and to modernize the electric grid to enable increased penetration of DERs, SCE forecasts capital expenditures of up to $19.3 billion for 2017 – 2020. The capital forecast for
2017 –2020 reflects updates primarily to reflect the delay in receipt of project approvals on the West of Devers project and the Mesa Substation project (see "Liquidity—Capital Investment Plan" for further information). The forecasted CPUC capital expenditures include traditional capital spending,public improvement, such as infrastructure replacement and maintenance, expansions and additions due to load growth and work requested by customers, as well as expenditures for grid modernization to support improved safety and reliability and increased levelsthe distribution of DERs. Traditional capital spending forelectricity, can be spread across the larger community that benefited from such improvement. However, in December 2017, reflects SCE's forecast capital expenditures for CPUC and FERC capital projects. Also included in 2017 capital expenditures is a baseline of grid modernization spending that will promote increased safety and reliability and also allow for a timely ramp-up of grid modernization capital expenditures in subsequent years. SCE has requested CPUC approval of a memorandum account to facilitate recovery in rates of such expenditures. The memorandum account has not yet been approved by the CPUC. SCE may receive further guidance on grid modernization spending from the CPUC as part of the DRP proceeding in the second half of 2017. Traditional capital expenditures for 2018 – 2020 reflect the amounts requested in the 2018 GRC filing and FERC capital projects. The CPUC has approved 81%, 89% and 92% of the traditional capital expenditures requested in the 2009, 2012 and 2015 GRC decisions, respectively. While SCE cannot predict the level of traditional capital spending that will be approved in the 2018 GRC decision, management is not aware of factors that would cause the percentage of SCE's request that is ultimately approved to be materially different from what has been approved in recent GRC decisions. SCE does not have prior approval experience with grid modernization capital expenditures and, therefore, is unable to predict an expected outcome.
Forecasted expenditures for FERC capital projects is subject to timely receipt of permitting, licensing and regulatory approvals. The following table sets forth a summary of capital expenditures for 2016 actual spend and a forecast for
2017 – 2020 on the basis described above:
(in millions) 2016 Actual2017201820192020Total 2017 – 2020
Traditional capital expenditures       
Distribution $2,840
$3,145
$3,214
$3,156
$3,085
$12,600
Transmission 457
629
919
996
1,033
3,577
Generation 203
204
225
216
206
851
Total requested traditional capital expenditures1, 2
 $3,500
$3,978
$4,358
$4,368
$4,324
$17,028
Grid modernization capital expenditures $27
$182
$637
$751
$714
$2,284
Total capital expenditures $3,527
$4,160
$4,995
$5,119
$5,038
$19,312
1
Includes Energy Storage of $50 million in 2016 and $60 million in the 2017 – 2020 period. Also, includes $12 million Charge Ready Pilot in 2017.
2 Capital expenditures for 2017 reflect management's expectations based on the 2015 GRC decision.
Capital expenditures for traditional capital projects under CPUC jurisdiction for 2017 are included in SCE's 2015 GRC. The 2018 – 2020 capital expenditures are included in the 2018 GRC application request discussed below. Recovery for
2017 – 2020 planned expenditures for traditional capital projects under FERC jurisdiction will be pursued through FERC-authorized mechanisms. For further information regarding the capital program, see "Liquidity and Capital Resources—SCE—Capital Investment Plan."


SCE's estimated weighted average annual rate base for 2017 – 2020 using the capital expenditures set forth in the table above is as follows:
(in millions) 2017201820192020
Rate base for requested traditional capital expenditures $26,241
$29,052
$31,161
$33,229
Rate base for requested grid modernization capital expenditures 
279
802
1,398
Total rate base $26,241
$29,331
$31,963
$34,627
The rate base above does not reflect reductions from the amounts requested in the 2018 GRC that may be included in a final decision.
Distribution Grid Development
Distribution Resources Plan
In July 2015, SCE filed its DRP with the CPUC. The filing was made as part of a CPUC proceeding that was initiated to support California's climate change and GHG reduction targets, modernize the electric distribution system to accommodate two-way flows of energy associated with DERs, such as rooftop solar, and facilitate customer choice of new technologies and services that reduce emissions and improve resilience. SCE's DRP included an indicative forecast of capital investment in distribution automation, substation automation, communications systems, technology platforms and applications, and grid reinforcement. The 2018 GRC includes operation and maintenance and capital expenditure requests consistent with SCE's DRP operation and maintenance and capital spending. Capital investments for 2017 may be updated or revised based on developments and guidance received from the CPUC as a part of the GRC, DRP rule making, technology availability, pace of DER adoption, and other factors. In January 2016, the CPUC issued a scoping memodecision denying the investor-owned utility's request to include in its rates uninsured wildfire-related costs arising from several 2007 fires, finding that providedthe investor-owned utility did not prudently manage and operate its facilities prior to or at the outset of the 2007 wildfires.
In addition to liability for property damages, when inverse condemnation is found to be applicable to a utility, the issuanceutility may be held liable, without regard to fault, for associated interest and attorney's fees (collectively, "Property Losses"). If inverse condemnation is held to be inapplicable to SCE in connection with the December 2017 Wildfires, SCE could still be held liable for Property Losses if those losses were found to have been proximately caused by SCE’s negligence. If SCE was found negligent, SCE also could be held liable for fire suppression costs, business interruption losses, evacuation costs, medical expenses and personal injury/wrongful death claims. These potential liabilities, in the aggregate, could be substantial. Additionally, SCE could potentially be subject to fines for alleged violations of guidance onCPUC rules and laws in connection with the December 2017 Wildfires.
SCE is aware of multiple lawsuits filed related to the December 2017 Wildfires naming SCE as a defendant. One of these lawsuits also named Edison International as a defendant. At least four of these lawsuits were filed as purported class actions. The lawsuits, which have been filed in the superior courts of Ventura, Santa Barbara and Los Angeles Counties allege, among other things, negligence, inverse condemnation, trespass, private nuisance, and violations of the public utility spending to modify its grid in order to support its DRP.and health and safety codes. SCE expects to receive such guidancebe the subject of additional lawsuits related to the December 2017 Wildfires. The litigation could take a number of years to be resolved because of the complexity of the matters and the time needed to complete the ongoing investigations.
Given the preliminary stages of the investigations and the uncertainty as to the causes of the December 2017 Wildfires, and the extent and magnitude of potential damages, Edison International and SCE are currently unable to reasonably estimate whether SCE will incur material losses and, if so, the range of possible losses that could be incurred.
SCE has approximately $1 billion of wildfire-specific insurance coverage, subject to a self-insured retention of $10 million per occurrence, for wildfire-related claims for the period ending on May 31, 2018. SCE also has approximately $300 million of additional insurance coverage for wildfire-related occurrences for the period from December 31, 2017 to December 31, 2018, which may be used in addition to the $1 billion in wildfire insurance for wildfire events occurring on or after December 31, 2017 and on or before May 31, 2018, and would be available for new wildfire events, if any, occurring after May 31, 2018 and on or before December 30, 2018. Various coverage limitations within the policies that make up SCE's wildfire insurance coverage could result in material self-insured costs in the second halfevent of 2017.multiple wildfire occurrences during a policy period. SCE also has other general liability insurance coverage of approximately $450 million but it is uncertain whether these other policies would apply to liabilities alleged to be related to wildfires. Should responsibility for damages be attributed to SCE for a significant portion of the losses related to the December 2017 Wildfires, SCE's insurance may not be sufficient to cover all such damages. In addition, SCE may not be authorized to recover its uninsured damages through customer rates if, for example, the CPUC finds that the damages were incurred because SCE was not a prudent manager of its facilities. The CPUC's SED is conducting an investigation to assess the compliance of SCE's facilities with applicable rules and regulations in areas impacted by the December 2017 Wildfires.
Charge Ready ProgramEdison International and SCE are pursuing legislative, regulatory and legal solutions to the application of a strict liability standard to wildfire-related damages without the ability to recover resulting costs from customers. Edison International and SCE cannot predict whether or when a solution mitigating the significant risk faced by a California investor-owned utility related to wildfires will be achieved.




Montecito Mudslides
In January 2016,2018, torrential rains in Santa Barbara County produced mudslides and flooding in Montecito and surrounding areas (the "Montecito Mudslides"). According to Santa Barbara County, the CPUC approved SCE's $22 million Charge Ready Phase 1 pilot program, which will allow SCE to install light-duty vehicle charging infrastructure, provide rebates to offset the cost of qualified customer-owned charging stations,Montecito Mudslides destroyed an estimated 135 structures, damaged an estimated 324 structures, and implement a supporting market education effort. Under the Phase 1 pilot program, SCE will build, own and maintain the electric infrastructure needed to serve the qualified charging stationsresulted in at participating customer locations. Participating customers will install, own, maintain, and operate the charging stations. By the end of January 2017, SCE had executed agreements for 50 sites to deploy 776 charge ports. The results of this pilot will help shape Phase 2least 21 fatalities, with two additional fatalities presumed.
Six of the program.lawsuits mentioned above allege that SCE has responsibility for the Thomas Fire and that the Thomas Fire proximately caused the Montecito Mudslides, resulting in the plaintiffs' claimed damages. SCE expects that additional lawsuits related to the Montecito Mudslides will file an applicationbe filed.
As noted above, the cause of the Thomas Fire has not been determined. In the event that SCE is determined to obtain CPUC approvalhave liability for Phase 2 after at least one year (Phase 1 launched in late May 2016) and 1,000 charge ports have been deployed.
Transportation Electrification Plan
In January 2017, SCE filed a transportation electrification plan with the CPUC that aims to accelerate the adoption of electric transportation, which is critical to California's climate change and GHG reduction objectives. The plan proposes a five-year program to fund medium- and heavy-duty vehicle charging infrastructure that follows the model developed for SCE's Charge Ready program discussed above. The proposal has an estimated five-year cost of $554 million ($532 million capital) in 2016 dollars. In addition, the plan proposes six pilot projects to be considereddamages caused by the CPUC on an accelerated basis. The pilot projects would install charging infrastructure for electric transit buses and the Port of Long Beach; build clusters of fast charging sites in urban areas, and establish programs that would incentivize electric vehicle adoption. The estimated total cost of the six pilot projects is approximately $19 million ($14 million capital) in 2016 dollars. SCE expects to propose additional programs and pilots in the future.
All of the plan's proposed transportation electrification projects are subject to CPUC review and the timing and amount of capital investments for any approved project will depend upon implementation decisions, including scope and pace of adoption and GRC ratemaking decisions and other CPUC actions. SCE is unable to predict an expected outcome on or timing of implementation of any of the proposed projects. The capital costs for these proposed projects are not included in SCE's capital spending and rate base forecasts provided above.

6




Edison International Dividend Policy
In December 2016, Edison International declared a 13% increase to the annual dividend rate from $1.92 per share to $2.17 per share. Edison International plans to increase its dividends to common shareholders at a higher than industry average growth rate within its target payout ratio of 45% to 55% of SCE earnings in steps over time. This is expected to yield a dividend growth at a faster pace than SCE's earnings growth.
Regulatory Proceedings
2018 General Rate Case
In September 2016, SCE filed its 2018 GRC application for the three-year period 2018 – 2020, which requested a 2018 revenue requirement of $5.885 billion, an increase of $222 million over the projected 2017 GRC authorized revenue requirement. In addition, SCE requested $48 million in one-time balancing and memorandum account recoveries. This represents a 2.7% increase over presently authorized total rates. SCE's 2018 GRC request also includes proposed revenue requirement increases of $533 million in 2019 and $570 million in 2020. For 2019 and 2020, respectively, these represent 4.2% and 5.2% increases over presently authorized total rates.
The capital programs requested in SCE's 2018 GRC are focused on safety and reliability through investments in the distribution grid to replace aging equipment and enhance capabilities to integrate increasing amounts of DERs. For further information, see "—Capital Program" above.
SCE's 2018 GRC request identifies areas of reduced operating cost to partially mitigate the customer rate impacts of the request.
SCE requested that the CPUC issue a final decision by the end of 2017. If the schedule for a final decision is delayed, SCE will request the CPUC to issue an order directing that the authorized revenue requirement changes be effective January 1, 2018.Thomas Fire, SCE cannot predict whether the revenue requirementcourts will conclude that the CPUCMontecito Mudslides were caused by the Thomas Fire or that SCE is responsible or liable for damages caused by the Montecito Mudslides. As a result, Edison International and SCE are currently unable to reasonably estimate whether SCE will incur material losses and, if so, the range of possible losses that could be incurred. If it is determined that the Montecito Mudslides were caused by the Thomas Fire and that SCE is responsible or liable for damages caused by the Montecito Mudslides, then SCE's insurance coverage for such losses may be limited to its wildfire insurance. Additionally, if SCE is determined to be liable for a significant portion of costs associated with the Montecito Mudslides, SCE's insurance may not be sufficient to cover all such damages and SCE may be unable to recover any uninsured losses.
If it is ultimately authorizedetermined that SCE is legally responsible for 2018 through 2020 or forecastlosses caused by the timing of a final decision.Montecito Mudslides, SCE could be held liable for resulting Property Losses if inverse condemnation is found applicable. If SCE is determined to have been negligent, in addition to Property Losses, SCE could be liable for business interruption losses, evacuation costs, clean-up costs, medical expenses and personal injury/wrongful death claims associated with the Montecito Mudslides. These liabilities, in the aggregate, could be substantial. SCE cannot predict whether it will be subjected to regulatory fines related to the Montecito Mudslides.
Permanent Retirement of San Onofre
Replacement steam generators were installed at San Onofre in 2010 and 2011. On January 31, 2012, a leak suddenly occurred in one of the heat transfer tubes in San Onofre's Unit 3 steam generators. The Unit was safely taken off-line and subsequent inspections revealed excessive tube wear. Unit 2 was off-line for a planned outage when areas of unexpected tube wear were also discovered. On June 6, 2013, SCE decided to permanently retire Units 2 and 3.
San Onofre CPUC Proceedings
In November 2014, the CPUC approved the Prior San Onofre OII Settlement Agreement, which, at the time, resolved the CPUC's investigation regarding the steam generator replacement project at San Onofre and the related outages and subsequent shutdown of San Onofre. Subsequently, the San Onofre OII proceeding record was reopened by a joint ruling of the Assigned Commissioner and the Assigned ALJ to consider whether, in light of the Company not reporting certain ex parte communications on a timely basis, the Prior San Onofre OII Settlement Agreement remained reasonable, consistent with the law and in the public interest, which is the standard the CPUC applies in reviewing settlements submitted for approval. In comments filed with
Entry into Revised Settlement and Utility Shareholder Agreements
On January 30, 2018, the CPUC in July 2016, SCE asserted that theOII Parties entered into a Revised San Onofre Settlement Agreement continues to meet this standard and therefore should not be disturbed. A number of the parties to the OII, however, have requested that the CPUC either modifyin the San Onofre OII proceeding. If approved by the CPUC, the Revised San Onofre Settlement Agreement or vacate its previous approval of the settlement and reinstate the OII for further proceedings.
In a December 2016 joint ruling, the Assigned Commissioner and the Assigned ALJ expressed concerns about the extent to which the failure to timely report ex parte communications had impacted the settlement negotiations and directed SCE to meet and confer with the other partieswill resolve all issues under consideration in the OII to consider changing the terms of the San Onofre OII Settlement Agreement. The ruling set out a schedule requiring that at least two meet and confer sessions be held in the first quarter of 2017 and requiring the parties to submit a joint status report to the CPUC by April 28, 2017 if no modifications have been agreed to by some or all of the parties as a result of the meet and confer process. SCE has recorded a regulatory asset to reflect the expected recoveries under the San Onofre OII Settlement Agreement. At December 31, 2016, $857 million remains to be collected.
For more information on the challenges to the settlement of the San Onofre OII and will modify the claimsPrior San Onofre Settlement Agreement. If approved by the CPUC, the Revised San Onofre Settlement Agreement will also result in the dismissal of a federal lawsuit currently pending in the 9th Circuit Court of Appeals challenging the CPUC’s authority to permit rate recovery of San Onofre costs. The Revised San Onofre Settlement Agreement was the result of multiple mediation sessions in 2017 and January 2018 and was signed on January 30, 2018 following a settlement conference in the OII, as required under CPUC rules.
Implementation of the terms of the Revised San Onofre Settlement Agreement is subject to the approval of the CPUC, as to which there is no assurance. The OII Parties have agreed to exercise their best efforts to obtain CPUC approval, but there can be no certainty of when or what the CPUC will actually decide.
On February 6, 2018, the San Onofre OII Assigned Commissioner and Assigned ALJ issued a joint ruling advising the parties, among other things, that (i) the CPUC will need additional information and that the parties should be prepared to submit joint testimony in support of the Revised San Onofre Settlement Agreement on March 26, 2018; (ii) there will be


public participation hearings and at least one additional status conference; and (iii) another ruling will be issued with further direction.
Disallowances, Refunds and Recoveries
If the Revised San Onofre Settlement Agreement is approved by the CPUC, the Utilities will cease rate recovery of San Onofre costs as of the date their combined remaining San Onofre regulatory assets equal $775 million (the "Cessation Date"). SCE has previously requested the CPUC to authorize SCE to reduce the San Onofre regulatory asset by applying $72 million of proceeds received from litigation with the DOE related to DOE's failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. If that request is approved by the CPUC, the Cessation Date is estimated to be December 19, 2017. If that request is not approved by the CPUC, the Cessation Date is estimated to be April 21, 2018. The Utilities will refund to customers San Onofre-related amounts recovered in rates after the Cessation Date. SCE will retain amounts collected under the Prior San Onofre Settlement Agreement before the Cessation Date. SCE also will retain $47 million of proceeds received in 2017 from arbitration with MHI over MHI's delivery of faulty steam generators. In the Revised San Onofre Settlement Agreement, SCE retains the right to sell its stock of nuclear fuel and not share such proceeds with customers, as was provided in the Prior San Onofre Settlement Agreement. SCE intends to sell its nuclear fuel inventory as market conditions warrant. Sales of nuclear fuel may be significant and will be accounted for as non-core gains when sales are executed.
Under the Prior San Onofre Settlement Agreement, the Utilities agreed to fund $25 million for a Research, Development and Demonstration program that is intended to develop technologies and methodologies to reduce greenhouse gas emissions ("GHG Reduction Program"). The Utilities' funding obligation is reduced to $12.5 million under the Revised San Onofre Settlement Agreement.
If approved by the CPUC, the Revised San Onofre Settlement Agreement will also provide certain exclusions from the determination of SCE's ratemaking capital structure. Notwithstanding that SCE is pursuing against MHI, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—will no longer recover its San Onofre Related Matters.regulatory asset, the debt borrowed to finance the regulatory asset will continue to be excluded from SCE's ratemaking capital structure. Additionally, SCE may exclude the after-tax charge resulting from the implementation of the Revised San Onofre Settlement Agreement from its ratemaking capital structure.
Accounting and Financial Impacts
Under the Prior San Onofre Settlement Agreement, GAAP required that previously incurred costs related to San Onofre Units 2 & 3 be reflected as a regulatory asset to the extent that management concluded the costs were probable of recovery through future rates. GAAP also requires that amounts collected that are probable of refund to customers be recorded as regulatory liabilities. In the fourth quarter of 2017, regulatory assets and liabilities were adjusted based on the probable approval of the Revised San Onofre Settlement Agreement.
In connection with the Revised San Onofre Settlement Agreement, and in exchange for the release of certain San Onofre-related claims, the Utilities entered into an agreement ("Utility Shareholder Agreement") in which SCE has agreed to pay SDG&E the amounts SDG&E would have received in rates under the Prior San Onofre Settlement Agreement but will not receive upon implementation of the Revised San Onofre Settlement Agreement. As of December 19, 2017, SDG&E's regulatory asset was approximately $151 million. In the fourth quarter of 2017, SCE recorded an accrued liability of $143 million for the estimated present value of this obligation. The following table summarizes the financial impact of the Revised San Onofre Settlement Agreement and the Utility Shareholder Agreement:
(in millions)


San Onofre base regulatory asset$696
DOE litigation regulatory liability(72)
MHI Arbitration regulatory liability(47)
GHG Reduction Program(10)
Other6
Present value of Utility Shareholder Agreement143
Total pre-tax charge$716
Total after-tax charge$448



Tax Reform
On December 22, 2017, Tax Reform was signed into law. This comprehensive reform of tax law reduces the federal corporate income tax rate from 35% to 21% and is generally effective beginning January 1, 2018. Certain provisions of Tax Reform, such as full expensing of certain capital expenditures ("bonus depreciation") and limitations on the deductibility of interest expense are not applicable to regulated utilities, such as SCE. It is expected that the new interest disallowance provisions applicable to the utility holding company would require allocations of interest expense to operating subsidiaries. As a result, Edison International expects that limitations on the deductibility of interest expense will be minimal for Edison International Parent and Other.
US GAAP requires deferred tax assets and liabilities to be measured at the enacted tax rate expected to apply when temporary differences are to be realized or settled. Thus, at December 31, 2017, the company's deferred taxes were re-measured based upon the new tax rate. Immediately prior to the enactment of Tax Reform, Edison International Parent and Other had approximately $2.6 billion of federal net operating loss carryforwards ("NOL") (excluding Capistrano Wind net operating loss carryforwards of approximately $400 million). The reduction in the federal corporate income tax rate does not change the gross dollar value of taxable income that may be offset by NOLs, however since future income will only be taxable at 21% the value of NOLs utilized after 2017 is reduced. The re-measurement of these NOLs along with the other deferred taxes, resulted in a non-core charge of $433 million reflected in "Income tax expense" for Edison International Parent and Other at December 31, 2017. Edison International Parent and Other also has $347 million of tax credit carryforwards (excluding Capistrano Wind tax credit carryforwards of approximately $112 million) which directly offset taxes due and are not re-measured in connection with Tax Reform.
The specific provisions of Tax Reform applicable to SCE generally allow for the continued deductibility of interest expense, the elimination of bonus depreciation of certain property acquired after September 27, 2017, and continues rate normalization requirements for accelerated depreciation benefits. While the re-measurement of deferred taxes at Edison International Parent and Other were recorded to earnings, the re-measurement of deferred taxes at SCE was mainly recorded to regulatory liabilities or an offset to regulatory assets since pre-tax amounts giving rise to the deferred taxes were created through ratemaking activities.
The CPUC and FERC regulatory processes that will be utilized to return the excess deferred taxes applicable to customers have not been determined. In the absence of regulatory guidance, judgment is required to estimate which deferred tax re-measurements will be refunded to customers and are subject to change based on the outcome of the regulatory processes. At December 31, 2017, the implementation of Tax Reform for SCE resulted in a reduction of deferred tax liabilities and an increase in regulatory liabilities of approximately $5.0 billion ("Excess Deferred Taxes"). Changes in the allocation to customers of the deferred tax re-measurement will be reflected in the financial statements and adjusted prospectively as information becomes available through the regulatory process. Amounts to be refunded to customers will generally be refunded over the life of the underlying asset or liability that gave rise to the deferred taxes. Since the majority of SCE's deferred taxes arise from property-related differences, SCE estimates that the amount to be refunded will be amortized over approximately 40 or more years. SCE also had shareholder-funded pre-tax amounts that gave rise to deferred tax assets resulting in a non-core charge of $33 million reflected in "Income tax expense."
In the near term, SCE expects Tax Reform to lower rates charged to customers, but not to have a meaningful impact to SCE's earnings. Certain deferred tax liabilities reduce SCE's rate base. The re-measurement of deferred tax liabilities from the implementation of Tax Reform will not impact SCE's rate base initially. However, Tax Reform's elimination of bonus depreciation and lower corporate tax rates will reduce cash flow from operations and increase rate base over time. In addition, as new plant is placed in service the lower federal corporate tax rate will result in lower deferred tax liabilities and, therefore, higher rate base than previously expected. See "—Capital Program." To the extent that Edison International Parent and Other continue to produce pre-tax losses, Tax Reform will result in lower tax benefits. Tax Reform will also impact Edison International's liquidity. See "Liquidity and Capital Resources—Edison International Parent and Other—Net Operating Loss and Tax Credit Carryforwards."
Electricity Industry Trends
The electric power industry is undergoing transformative change driven by technological advances such as customer-owned generation and energy storage, which is altering the nature of energy generation and delivery. California is committed to reducing its GHG emissions, improving local air quality and supporting continued economic growth. The state set goals to reduce GHG emissions by 40 percent from 1990 levels by 2030 and 80 percent from the same baseline by 2050. State and local air quality plans call for substantial improvements, such as reducing smog-causing nitrogen oxides 90 percent below 2010 levels by 2032 in the most polluted areas of the state. While these policy goals cannot be achieved by the electric sector alone, the electric grid is a critical enabler of the adoption of new energy technologies that support California's climate

78




Costchange and GHG reduction objectives. The grid is also key to enabling more customer choices with respect to new energy technologies.
Edison International expects to be a leader in the transformation of Capitalthe industry by focusing on opportunities in clean energy and efficient electrification, building a modernized and more reliable grid, and enabling customers' technology choices.
On February 7, 2017, SCE Pacific Gasplans to be a key enabler of the adoption of new energy technologies that benefit customers of the electric grid while also helping California achieve its environmental goals. SCE expects to achieve these objectives through modernizing the electric grid to improve the safety and Electric Company, SDG&E,reliability of the transmission and SoCalGas (collectively,distribution network and helping customers make cleaner energy choices including enabling increased penetration of DERs, electric transportation and energy efficiency programs. SCE's ongoing focus to drive operational and service excellence is intended to allow it to achieve these objectives safely while controlling costs and customer rates. SCE's focus on the “Investor-Owned Utilities”), ORAtransmission and TURN jointly filed a petitiondistribution of electricity aligns with California's policy supporting competitive power procurement markets. For more information on the distribution grid development, see "—Capital Program—Distribution Grid Development" below.
Changes in the electric power industry are impacting customers and jurisdictions outside California as well. Edison International believes that other states will also pursue climate change and GHG reduction objectives and large commercial and industrial customers will continue to modifypursue cost reduction and sustainability goals. Edison Energy Group provides energy services, managed portfolio solutions and distributed solar solutions to commercial and industrial customers who may be impacted by these changes. Edison Energy Group seeks to provide advice in dealing with increasingly complex tariff and technology choices in order to support customers and their management of energy costs and risks.
2018 General Rate Case
As part of SCE's December update in the prior CPUC decisions addressing the Investor-Owned Utilities' costs of capital. The requested modifications would extend the next cost of capital application filing deadline two years to April 22, 2019GRC proceedings for the year 2020; reset SCE's authorized cost of long-term debt and preferred stock in 2018; and reduce SCE's authorized ROE. Subject to the CPUC's approval of the petition for modification, SCE's authorized ROE will be reduced from the current 10.45% to 10.30% beginning on January 1, 2018. Thethree-year period 2018 – 2020, SCE updated cost of capital and correspondingits 2018 revenue requirement impact will be submittedrequest from $5.885 billion to $5.673 billion, a $33 million increase over the CPUC in September 2017 to be effective January 1, 2018. While the actual changes to SCE'sGRC authorized revenue requirement, resulting from the petition for modification will not be known until SCE's filingand proposed post-test year increases in September 2017, SCE estimates that its annual revenue requirement will be reduced2019 and 2020 of $477 million and $554 million, respectively. The changes are primarily driven by approximately $66 million (approximately $39 million after-tax), beginning in 2018. Changes in market interest rates can have material effects on the cost of SCE’s future financings and consequently on the estimated change in annual revenue requirements.
The petition for modification provides that SCE's long-term debt, preferred stock and common equity costs will be reset for the year 2018 and will then remain unchanged until December 31, 2019 unless they are changed by the operation ofan update to the cost of capital, adjustment mechanism. SCE’s current ratemakingupdated pension and benefits forecast and escalation rate forecasts. In February 2018, SCE further updated its request to incorporate the changes associated with Tax Reform, which resulted in a revenue requirement of $5.534 billion, a decrease of $139 million from the December update filing. The proposed post-test year decreases in 2019 and 2020 from the December update filing are $185 million and $235 million, respectively.
In April 2017 intervenor testimony, the ORA proposed, among other things, capturing grid modernization spending in a memorandum account for review in the 2021 GRC. TURN recommended reductions of 78% of grid modernization capital structure (48% common equity, 43% long-term debt,expenditures in 2018 and 9% preferred equity) will remain unchangedinitially recommended adjustments to rate base for historical capital expenditures, including a reduction of $550 million, primarily related to certain distribution infrastructure replacement programs.
Public participation hearings and updated testimony were completed in late 2017. A final 2018 GRC decision is not expected until later in 2018. SCE expects to recognize revenue based on the 2017 authorized revenue requirement, adjusted for the July cost of capital adjustment mechanism would not operate in 2017 but could operate indecision and Tax Reform, until a GRC decision is issued. The CPUC has approved the establishment of a GRC memorandum account, which will make the 2018 to change the cost of capital for 2019. If the mechanism is activated for 2019, SCE’s new 10.30% ROE will be adjusted according to the existing terms of the mechanism.
Energy Efficiency Incentive Mechanism
In December 2016,revenue requirement adopted by the CPUC awardedeffective as of January 1, 2018. SCE incentives of approximately $18 million, approximately 75% ofcannot predict the requested award, for Part 2 of the 2014 program year and Part 1 of the 2015 program year savings. There is no assurance thatrevenue requirement the CPUC will make an award for any given year.authorize or provide assurance on the timing of a final decision.

FERC Formula Rates
Capital Program
Total capital expenditures (including accruals), were $3.8 billion in 2017 and $3.5 billion in 2016. SCE's year-end rate base was $27.8 billion at December 31, 2017 compared to $25.9 billion at December 31, 2016.
In November 2016, SCE filed its 2017 annual updateconnection with the FERC with2018 GRC, SCE forecasts capital expenditures of up to $13.7 billion for 2018 – 2020. In the rates effective from January 1, 2017absence of a 2018 GRC decision, SCE has developed, and is executing against, a 2018 capital expenditure plan that will allow SCE to December 31, 2017. The update provided support for an increase in SCE's transmission revenue requirement of $97 million or 9%ramp up its capital spending program over amounts currentlythe three-year GRC period to meet what is ultimately authorized in rates. the 2018 GRC decision while minimizing the associated risk of unauthorized spending. A component of this approach is to focus initial grid modernization spending on capital that provides safety and reliability benefits while deferring most spending that is primarily focused on integration of distributed energy resources.
The increaseCPUC has approved 81%, 89%, and 92% of the traditional capital expenditures requested in the 2009, 2012, and 2015 GRC decisions, respectively. While SCE cannot predict the level of traditional capital spending that will be approved in the 2018 GRC decision, management is mainlynot aware of factors that would cause the percentage of SCE's request that is approved to be materially different from what has been approved in recent GRC decisions. SCE does not have prior approval experience with grid modernization capital expenditures and, therefore, is unable to predict an expected outcome. The table below reflects expected CPUC jurisdictional capital expenditures for 2018 and requested capital expenditures for 2019 – 2020. FERC jurisdictional capital expenditures are based on management’s expectations. Forecasted expenditures for FERC capital projects are subject to change due to timeliness of permitting, licensing, regulatory approvals, and contractor bids. For further information regarding updates for large transmission and substation projects, see "Liquidity and Capital Resources—SCE—Capital Investment Plan." The following table sets forth a summary of capital expenditures for 2017 actual spend and a forecast for 2018 – 2020 on the completion of several major transmission projectsbasis described above:
(in millions) 2017201820192020Total 2018 – 2020
Traditional capital expenditures1
      
Distribution2
 $3,131
$3,399
$3,161
$3,048
$9,608
Transmission 501
609
762
874
2,245
Generation 203
193
212
201
606
Total traditional capital expenditures1
 $3,835
$4,201
$4,135
$4,123
$12,459
Grid modernization capital expenditures2
 $
$
$649
$608
$1,257
Total capital expenditures $3,835
$4,201
$4,784
$4,731
$13,716
1
Includes 2018 – 2020 capital expenditures of $49 million for Energy Storage, $10 million for Transportation Electrification, and $4 million for Charge Ready.
2
2017 and 2018 capital expenditures related to grid modernization are included in traditional capital expenditures.
SCE’s CPUC-jurisdictional rate base is determined by the amount authorized by the CPUC. Differences between actual and authorized capital expenditures are addressed in 2015subsequent GRC proceedings. FERC-jurisdictional rate base is generally determined based on actual capital expenditures. Reflected below is SCE's estimated weighted average annual rate base for 2018 – 2020 using CPUC capital expenditures as requested in the 2018 GRC. The estimated weighted average annual rate base was updated to reflect FERC expected capital expenditures and to recover prior undercollections. FERC has approved SCE's formula or methodology for setting transmission rates under its jurisdiction through 2017. SCE is required to filechanges associated with Tax Reform as discussed above.
(in millions) 201820192020
Rate base for requested traditional capital expenditures $28,860
$31,070
$33,332
Rate base for requested grid modernization capital expenditures 264
743
1,279
Total rate base $29,124
$31,813
$34,611
The rate base above does not reflect reductions from the amounts requested in the 2018 GRC that may be included in a replacement rate methodology by November 2017, to be effective January 2018.final decision.
Long Beach Service Interruptions
10




Distribution Grid Development
Distribution Resources Plan
In July 2015, SCE filed its DRP with the CPUC. The filing was made as part of a CPUC proceeding initiated to support California's climate change and GHG reduction targets, modernize the electric distribution system to accommodate two-way flows of energy associated with DERs, such as rooftop solar, and facilitate customer choice of new technologies and services that reduce emissions and improve resilience. SCE's DRP included an indicative forecast of capital investment in distribution automation, substation automation, communications systems, technology platforms and applications, and grid reinforcement. The 2018 GRC includes operation and maintenance and capital expenditure requests consistent with SCE's DRP operation and maintenance and capital spending. Capital investments for 2018 may be updated or revised based on developments and guidance received from the CPUC as a part of the 2018 GRC, DRP rule making, technology availability, pace of DER adoption, and other factors. In January 2016, the CPUC issued a scoping memo that provided for, among other things, the issuance of guidance on utility spending to modify its grid in order to support its DRP. In 2017, the CPUC issued decisions on other topics in the DRP proceeding such as new DER integration tools and field demonstration projects as well as a proposed decision that would establish a new distribution investment deferral framework and new guidance regarding DER adoption forecasting. However, a proposed decision addressing grid modernization investment guidelines has not yet been issued and it is uncertain when SCE will receive firm guidance on the DRP proceeding.
Charge Ready Program
In January 2016, the CPUC approved SCE's $22 million Charge Ready Phase 1 pilot program, which allows SCE to install light-duty vehicle charging infrastructure, provide rebates to offset the cost of qualified customer-owned charging stations, and implement a supporting market education effort. Under the Phase 1 pilot program, SCE is building, and will own and maintain the electric infrastructure needed to serve the qualified charging stations at participating customer locations. Participating customers whoinstall, own, maintain, and operate the charging stations. By the end of December 2017, SCE had executed agreements for 74 sites to deploy 1,116 charge ports. The results of this pilot will help shape Phase 2 of the program. SCE anticipates filing an application to obtain CPUC approval for Phase 2 by the second quarter of 2018. The capital costs for Phase 2 of the program are served vianot included in SCE's capital spending and rate base forecasts provided above.
Transportation Electrification Plan
In January 2017, SCE filed a transportation electrification plan with the network portionCPUC to accelerate the adoption of electric transportation, which is critical to California's climate change and GHG reduction objectives. The plan proposes a five-year program to fund medium- and heavy-duty vehicle charging infrastructure that follows the model developed for SCE's Charge Ready program discussed above. The proposal has an estimated five-year cost of $554 million ($532 million capital) in 2016 dollars. In addition, the plan proposed six pilot projects to be considered by the CPUC on an accelerated basis. The pilot projects would install charging infrastructure for electric systemtransit buses and the Port of Long Beach; build clusters of fast charging sites in Long Beach, California experienced service interruptions due to multiple underground vault firesurban areas, and underground cable failures. No personal injuries were reportedestablish programs that would incentivize electric vehicle adoption. The estimated total cost of the six pilot projects is approximately $19 million ($14 million capital) in connection with these events.2016 dollars. In January 2018, the CPUC issued a final decision approving five of the six pilot projects. SCE expects to incur penalties asreceive a resultCPUC decision on the five-year program in the second quarter of these events. Although resolution will be2018. SCE expects to propose additional programs and pilots in the future.
All of the plan's proposed transportation electrification projects are subject to settlement discussions with SED and CPUC review and approval, SCE has recorded a liabilitythe timing and amount of capital investments for the estimated loss.any approved project will depend upon implementation decisions, including scope and pace of adoption and GRC ratemaking decisions and other CPUC actions. The capital costs for these proposed projects are not included in SCE's capital spending and rate base forecasts provided above.

11




RESULTS OF OPERATIONS
SCE
SCE's results of operations are derived mainly through two sources:
Earning activities – representing revenue authorized by the CPUC and FERC which is intended to provide SCE a reasonable opportunity to recover its costs and earn a return on its net investment in generation, transmission and distribution assets. The annual revenue requirements are comprised of authorized operation and maintenance costs, depreciation, taxes and a return consistent with the capital structure. Also, included in earnings activities are revenuesrevenue or penalties related to incentive mechanisms, other operating revenue, and regulatory charges or disallowances.
Cost-recovery activities – representing CPUC- and FERC-authorized balancing accounts which allow for recovery of specific project or program costs, subject to reasonableness review or compliance with upfront standards. Cost-recovery activities include rates which provide recovery, subject to reasonableness review of, among other things, fuel costs, purchased power costs, public purpose related-program costs (including energy efficiency and demand-side management programs) and certain operation and maintenance expenses. SCE earns no return on these activities.

8




The following table is a summary of SCE's results of operations for the periods indicated.
201620152014201720162015
(in millions)
Earning
Activities
Cost-
Recovery
Activities
Total
Consolidated
Earning
Activities
Cost-
Recovery
Activities
Total Consolidated
Earning
Activities
Cost-
Recovery
Activities
Total Consolidated
Earning
Activities
Cost-
Recovery
Activities
Total
Consolidated
Earning
Activities
Cost-
Recovery
Activities
Total Consolidated
Earning
Activities
Cost-
Recovery
Activities
Total Consolidated
Operating revenue$6,504
$5,326
$11,830
$6,305
$5,180
$11,485
$6,831
$6,549
$13,380
$6,611
$5,643
$12,254
$6,504
$5,326
$11,830
$6,305
$5,180
$11,485
Purchased power and fuel
4,527
4,527

4,266
4,266

5,593
5,593

4,873
4,873

4,527
4,527

4,266
4,266
Operation and maintenance1,939
798
2,737
1,977
913
2,890
2,106
951
3,057
1,902
769
2,671
1,939
798
2,737
1,977
913
2,890
Depreciation, decommissioning and amortization1,998

1,998
1,915

1,915
1,720

1,720
Depreciation and amortization2,032

2,032
1,998

1,998
1,915

1,915
Property and other taxes351

351
334

334
318

318
372

372
351

351
334

334
Impairment and other charges





163

163
716

716






Other operating income(8)
(8)





Total operating expenses4,288
5,325
9,613
4,226
5,179
9,405
4,307
6,544
10,851
5,014
5,642
10,656
4,288
5,325
9,613
4,226
5,179
9,405
Operating income2,216
1
2,217
2,079
1
2,080
2,524
5
2,529
1,597
1
1,598
2,216
1
2,217
2,079
1
2,080
Interest expense(540)(1)(541)(525)(1)(526)(528)(5)(533)(588)(1)(589)(540)(1)(541)(525)(1)(526)
Other income and expenses79

79
64

64
43

43
97

97
79

79
64

64
Income before income taxes1,755

1,755
1,618

1,618
2,039

2,039
1,106

1,106
1,755

1,755
1,618

1,618
Income tax expense256

256
507

507
474

474
Income tax (benefit) expense(30)
(30)256

256
507

507
Net income1,499

1,499
1,111

1,111
1,565

1,565
1,136

1,136
1,499

1,499
1,111

1,111
Preferred and preference stock dividend requirements123

123
113

113
112

112
124

124
123

123
113

113
Net income available for common stock$1,376
$
$1,376
$998
$
$998
$1,453
$
$1,453
$1,012
$
$1,012
$1,376
$
$1,376
$998
$
$998
Net income available for common stock $1,376
 $998
 $1,453
 $1,012
  $1,376
 $998
Less: Non-core items             
Impairment and other charges 
 (382) (72) (448)  
 (382)
Re-measurement of deferred taxes (33)  
 
NEIL insurance recoveries 
 12
 
 
  
 12
Core earnings1
 $1,376
  $1,368
 $1,525
 $1,493
  $1,376
  $1,368
1 
See use of non-GAAP financial measures in "Management Overview—Highlights of Operating Results."

12




Earning Activities
2017 vs 2016
Earning activities were primarily affected by the following:
Higher operating revenue of $107 million is primarily due to:
An increase in revenue of approximately $241 million related to the increase in authorized revenue from the escalation mechanism set forth in the 2015 GRC decision and $32 million of higher operating costs subject to balancing account treatment (primarily offset in depreciation expense below). These increases were partially offset by $33 million of lower revenue related to the extension of bonus depreciation and a $15 million revenue reduction for the expected refund to customers of prior overcollections identified in 2017.
Energy efficiency incentive awards recognized in 2017 were $17 million compared to $5 million in 2016. During 2016, the CPUC approved a settlement agreement in which SCE agreed to refund $13 million related to incentive awards SCE received for savings achieved by its 2006 – 2008 energy efficiency programs.
A decrease in revenue of $118 million related to tax benefits refunded to customers (offset in income taxes below). The decrease in revenue resulted from $116 million of higher year-over-year incremental tax repair benefits recognized and $135 million of benefits recognized for tax accounting method changes. These decreases were partially offset by a 2016 revenue refund to customers of $133 million related to 2012 – 2014 incremental tax repair deductions.
A decrease in FERC-related revenue of $39 million primarily related to higher operating costs in 2016 including amortization of the regulatory asset associated with the Coolwater-Lugo transmission project and a $8 million reduction to FERC revenue due to a change in estimate under the FERC formula rate mechanism.
An increase of $20 million for other operating revenue resulting from refunds to customers recorded in 2016 due to the retroactive extension of bonus depreciation in the PATH Act of 2015.
Lower operation and maintenance expense of $37 million primarily due to the impact of SCE's operational and service excellence initiatives and lower legal costs partially offset by higher transmission and distribution costs for line clearing and maintenance and information technology costs.
Higher depreciation and amortization expense of $34 million primarily related to depreciation and amortization on transmission and distribution investments partially offset by amortization of the regulatory asset related to Coolwater-Lugo plant recorded in 2016.
Higher property and other taxes of $21 million primarily due to higher property assessed values in 2017.
Impairment and other charges of $716 million in 2017 due to the Revised San Onofre Settlement Agreement (see "Management Overview—Highlights of Operating Results" for further information).
Higher other operating income of $8 million due to the sale of utility property.
Higher interest expense of $48 million primarily due to increased borrowings and higher interest on balancing account overcollections in 2017.
Higher other income and expenses of $18 million primarily due to higher AFUDC equity income. See "Notes to Consolidated Financial Statements—Note 14. Interest and Other Income and Other Expenses" for further information.
Lower income taxes of $286 million primarily due to the following:
Higher non-core income tax benefits in 2017 of $235 million due to the impairment and other charges related to the Revised San Onofre Settlement Agreement partially offset by $33 million income tax expense related to the re-measurement of deferred taxes resulting from the implementation of Tax Reform.
Higher income tax benefits in 2017 of $70 million due to $149 million related to flow through of incremental tax repair benefits and for tax accounting method changes (offset in revenue above) partially offset by $79 million flow-through of 2012 – 2014 incremental income tax benefits in 2016.
Higher pre-tax income in 2017, excluding non-core items discussed above.

13




2016 vs 2015
Earning activities were primarily affected by the following:
Higher operating revenue of $199 million is primarily due to:
An increase in revenue of approximately $191 million related to the increase in authorized revenue from the escalation mechanism set forth in the 2015 GRC decision.
An increase in FERC-related revenue of $68 million primarily related to higher operating costs including amortization of the regulatory asset associated with the Coolwater-Lugo transmission project and rate base growth partially offset by a $15 million increase in 2015 due to a change in estimate under the FERC formula rate mechanism.
An increase in revenue of $25 million ($15 million after-tax) related to the incremental return on the pole loading rate base recorded through the pole loading balancing account.
An increase of $46 million primarily due to tax benefits recognized in 2015 related to net operating loss carrybacks for San Onofre decommissioning costs resulting in a reduction in revenue in 2015 (offset in income taxes).
A decrease in revenue of $52 million for incremental tax benefits refunded to customers. In 2016, SCE recorded a revenue refund to customers of $133 million for 2012 – 2014 incremental tax benefits related to repair deductions (offset in income taxes as discussed below). This revenue refund resulted from the CPUC's approval of SCE's request to refund incremental tax repair deductions that were not addressed in SCE's 2015 GRC decision. Partially offsetting

9




the refund of 2012 – 2014 incremental tax repair deductions, SCE recognized $81 million lower incremental tax repairs and other benefits refunded to customers through balancing accounts in 2016.
Energy efficiency incentive awards were $18 million in 2016 compared to $29 million in 2015. In addition, in 2016, the CPUC approved a settlement agreement in which SCE agreed to refund $13 million related to incentive awards SCE received for savings achieved by its 2006 – 2008 energy efficiency programs.
SCE's portion of NEIL insurance and legal cost recoveries of approximately $20 million in 2015 arising from the outage and shutdown of the San Onofre Units 2 and 3 generating stations.
A decrease of $29 million for other operating revenue resulting from lower contributions received from customers due to the retroactive extension of bonus depreciation in the PATH Act of 2015.
Lower operation and maintenance expense of $38 million primarily due to lower labor related to SCE's focus on operational and service excellence as well as lower outside services partially offset by higher transmission and distribution costs for rain and storm-related activities.
Higher depreciation decommissioning and amortization expense of $83 million primarily related to depreciation on higher rate base and amortization of the regulatory asset related to the Coolwater-Lugo plant, as discussed above.
Higher property and other taxes of $17 million primarily due to higher property assessed values in 2016.
Higher interest expense of $15 million primarily due to reduced interest capitalization (AFUDC debt) related to lower construction work in progress balances and a higher interest rate on balancing account overcollections in 2016.
Higher other income and expenses of $15 million primarily due to higher insurance benefits and lower advertising expense in 2016. See "Notes to Consolidated Financial Statements—Note 14. Interest and Other Income and Other Expenses" for further information.
Lower income taxes of $251 million primarily due to the following:
Write-down of $382 million in 2015 of regulatory assets previously recorded for recovery of deferred income taxes from 2012 – 2014 incremental tax repair deductions.
Higher income tax benefits in 2016 of $31 million primarily due to $79 million related to the flow-through of incremental tax benefits for 2012 – 2014 to customers partially offset by lower income tax benefits in 2016 of
$48 million related to the flow-through of incremental tax repair and other benefits refunded to customers through balancing accounts.
Lower income tax expense in 2016 of $13 million related to the adoption of the FASB guidance on accounting for share-based payments (see "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Guidance—New Accounting Guidance" for further information).payments.

14




A change in liabilities related to uncertain tax positions related to repair deductions, which resulted in income tax benefits of $100 million during the second quarter of 2015. See "—Income Taxes" below for more information.
Higher pre-tax income in 2016, as discussed above.
Higher preferred and preference stock dividends of $10 million primarily related to new issuances in 2016 and late 2015 partially offset by redemptions of preferred stock.
Cost-Recovery Activities
20152017 vs 20142016
EarningCost-recovery activities were primarily affected by the following:
Lower operating revenueHigher purchased power and fuel costs of $526 million is primarily due to:
A decrease in authorized CPUC revenue of $379 million (excludes amounts classified as cost-recovery activities). The decrease in revenue is primarily due to lower authorized revenue for operation and maintenance expenses and for flow-through items for income tax benefits related to repair and cost of removal deductions.
A decrease in revenue from approximately $300 million of tax benefits in excess of amounts authorized in the 2015 GRC and recognized through the TAMA and the pole loading balancing account (offset in income tax benefits

10




discussed below). In addition, SCE recorded $39 million ($26 million after-tax) of incremental return on the pole loading rate base recorded through this balancing account.
An increase in FERC-related revenue of $83$346 million primarily relateddriven by higher power and gas prices experienced in 2017 relative to rate base growth and higher operating costs.
An increase2016, partially offset by lower realized losses on hedging activities ($14 million in San Onofre-related revenue of $40 million due to the implementation of the San Onofre OII Settlement Agreement. Revenue for San Onofre for 2015 primarily related to recovery of amortization of the regulatory asset and authorized return as provided by the San Onofre Settlement Agreement2017 compared to revenue in 2014 related to recovery of San Onofre's cost of service.
Energy efficiency incentive awards were $29$59 million in 2015 compared to $22 million in 2014.
SCE's portion of NEIL insurance2016) and legal cost recoveries of approximately $20 million in 2015 (See "Notes to the Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—San Onofre Related Matters" for further information on the agreement with NEIL).
Higher revenue in 2014 from approval by the CPUC of a $30 million increase in the 2012 – 2014 authorized revenue requirement related to deferred income taxes and from $15 million of generator settlements. See “Notes to the Consolidated Financial Statements—Note 10. Regulatory Assets and Liabilities—Net Regulatory Balancing Accounts.”lower capacity costs.
Lower operation and maintenance expense of $129$29 million primarily due to:
Lower San Onofre-related expense of $93 million. During 2014, San Onofre-related expenses were recorded as operationdriven by lower employee benefit and maintenance expenses. During 2015, the CPUC authorized SCE reimbursement of 2014other labor costs from the nuclear decommissioning trusts with such reimbursement subsequently refunded to customers. During 2015, decommissioning expenses were reimbursed from the nuclear decommissioning trust and therefore, did not resultlower spending on various public purpose programs, partially offset by an increase in operation and maintenance expenses.
A decrease of $77 million primarily related to transmission and distribution legal,costs for line clearing and customer service costs partially offset by higher outside service costs in 2015.maintenance activities.
Higher severance costs related to workforce reduction efforts ($26 million in 2015 and $2 million in 2014).
In 2015, SCE incurred a penalty of approximately $17 million related to not reporting certain ex parte communications on a timely basis.
Higher depreciation, decommissioning and amortization expense of $195 million primarily due to San Onofre-related expense of $134 million in 2015 related to the amortization of the regulatory asset and a $61 million increase in depreciation primarily related to transmission and distribution investments.
Higher property and other taxes of $16 million primarily due to an increase in assessed property values in 2015.
Impairment and other charges of $163 million ($72 million after-tax) in 2014 related to the San Onofre OII Settlement Agreement, as discussed below.
Higher other income and expenses of $21 million primarily due to higher AFUDC equity income related to a higher rate and higher construction work in progress balances in 2015 and a $15 million penalty recorded in 2014 resulting from the San Bernardino and San Gabriel settlements. These increases were offset by $10 million of lower insurance benefits in 2015 and a $7 million of sales tax refund related to San Onofre received in 2014. See "Notes to Consolidated Financial Statements—Note 14. Interest and Other Income and Other Expenses" for further information.
Higher income taxes of $33 million primarily due to the following:
Write-down of $382 million in 2015 of regulatory assets previously recorded for recovery of deferred income taxes from 2012 – 2014 incremental tax repair deductions.
An increase in income tax benefits in 2015 primarily related to $263 million (after-tax) of repair deductions (offset in operating revenue above) for TAMA and pole loading balancing account partially offset by lower tax benefits on other property-related items in 2015.
A change in liabilities related to uncertain tax positions related to repair deductions, which resulted in income tax benefits of $100 million and $29 million during the second quarters of 2015 and 2014, respectively. See "—Income Taxes" below for more information.

11




Lower pre-tax income in 2015, as discussed above, partially offset by the impact of the San Onofre OII Settlement Agreement.
Cost-Recovery Activities
2016 vs 2015
Cost-recovery activities were primarily affected by the following:
Higher purchased power and fuel of $261 million primarily due to the NEIL insurance recoveries received in 2015 (discussed below) and a change in portfolio mix partially offset by lower load related to cooler weather.
In October 2015, San Onofre owners reached an agreement with NEIL to resolve all insurance claims arising out of the failures of the San Onofre replacement steam generators. SCE customer's portion of amounts recovered from NEIL has been distributed to SCE customers via a credit to SCE's ERRA account of approximately $300 million in 2015.
Lower operation and maintenance expense of $115 million primarily due to lower transmission access charges and lower spending on various public purpose programs partially offset by an increase in transmission and distribution costs for drought related activities.
2015 vs 2014
Cost-recovery activities were primarily affected by the following:
Lower purchased power and fuel of $1.3 billion primarily driven by lower power and gas prices, the NEIL insurance recoveries and the CAISO generation surcharge of $83 million in 2014 (as discussed below). These decreases were partially offset by higher realized losses on economic hedging activities ($148 million in 2015 compared to $57 million in 2014). Fuel costs were $176 million in 2015 and $256 million in 2014.
During 2014, the CAISO issued invoices implementing a FERC order which revised FERC tariffs for costs associated with scheduling coordinator activities. The impact of implementing the order and revised invoices resulted in a transmission refund of $106 million reflected in operation and maintenance expense and a generation surcharge of $83 million reflected in purchased power expense. These transactions did not impact earnings as the net refund was provided to customers through a FERC balancing account mechanism.
Lower operation and maintenance expense of $38 million primarily due to lower spending on various public purpose programs, lower pension and benefit expenses and a decrease in transmission access charges, partially offset by the 2014 CAISO refund of $106 million as discussed above.
Supplemental Operating Revenue Information
SCE's retail billed and unbilled revenue (excluding wholesale sales and balancing account over/undercollections) was
$10.7 $11.5 billion, in 2016$10.7 billion and $12.2 billion for both2017, 2016 and 2015, and 2014.respectively. The 2017 revenue reflects an increase of approximately $720 million primarily due to the implementation of the 2017 ERRA rate increase.
The 2016 revenue reflects:
Areflects a rate decrease of $1.15 billion primarily due to the implementations of the 2016 ERRA rate decreasechange and the 2015 GRC decision in January 2016.
A2016 and a sales volume decrease of $321 million due to lower load requirements related to cooler weather experienced in 2016 compared to 2015.
The 2015 revenue reflects:
An increase of $160 million primarily due to the implementations of the 2014 ERRA rate increase in June 2014 and the San Onofre-related rate adjustment in January 2015.
A sales volume decrease of $169 million due to lower load requirements related to cooler weather experienced in 2015 compared to 2014.
As a result of the CPUC-authorized decoupling mechanism, SCE earnings are not affected by changes in retail electricity sales (see "Business—SCE—Overview of Ratemaking Process").

1215




Income Taxes
SCE’s income tax provision decreased by $286 million in 2017 compared to 2016 and decreased by $251 million in 2016 compared to 2015 and increased by $33 million in 2015 compared to 2014.2015. The effective tax rates were 14.6%(2.7)%, 14.6% and 31.3% for 2017, 2016 and 23.2% for 2016, 2015, and 2014, respectively. SCE's effective tax rate is below the federal statutory rate of 35% primarily due to CPUC's ratemaking treatment for the current tax benefit arising from certain property-related and other temporary differences, which reverse over time. The accounting treatment for these temporary differences results in recording regulatory assets and liabilities for amounts that would otherwise be recorded to deferred income tax expense. The effective tax rate decrease in 2017 was primarily due to impairment and other charges of $716 million related to the Revised San Onofre Settlement Agreement. The decrease was also attributable to higher incremental repair tax benefits and benefits recognized for tax accounting method changes, all of which will be refunded to customers partially offset by lower tax benefits for the $133 million revenue refund to customers that was recorded in 2016. The effective tax rate decrease in 2016 was primarily due to the
$382 $382 million write-down in 2015 of regulatory assets (discussed in "Management Overview—Highlights of Operating Results") partially offset by revisions in liabilities related to uncertain tax positions in 2015. The effective tax rate increase in 2015 was primarily due to a $382 million write-down in 2015 of regulatory assets and income tax benefits in 2014 related to San Onofre OII Settlement Agreement, partially offset by higher income tax benefits related to tax repair deductions (as discussed above) and the change in liabilities related to uncertain tax positions.
See "Notes to Consolidated Financial Statements—Note 7. Income Taxes" for a reconciliation of the federal statutory rate of 35% to the effective income tax rates and "Management Overview—Permanent Retirement of San Onofre" above for more information.
Edison International Parent and Other
Results of operations for Edison International Parent and Other includes amounts from other subsidiaries that are not significant as a reportable segment, as well as intercompany eliminations.
Strategic Review of Edison Energy Group Competitive Businesses
During the third quarter of 2017, Edison International completed a strategic review of Edison Energy Group's competitive businesses. The competitive businesses pursued by Edison Energy Group include energy and managed portfolio services provided by Edison Energy and distributed solar solutions provided by SoCore Energy. Edison International decided to evaluate strategic options, including potential sale of SoCore Energy, and consolidate management across Edison Energy Group. Edison Energy will continue to pursue a proof of concept of its existing energy services and managed portfolio solutions practice for large energy users in the United States. Under the proof of concept, Edison Energy will seek to achieve a breakeven earnings run rate and 5% target customer penetration by the end of 2019.
In connection with the strategic review, Edison International evaluated the recoverability of goodwill and recorded an impairment of SoCore Energy's goodwill totaling $16 million ($10 million after-tax) in the second quarter of 2017. SoCore Energy's remaining goodwill at December 31, 2017 was $6 million. 
In light of the decision to evaluate sale opportunities for SoCore Energy, Edison International considered the application of held for sale accounting treatment under the applicable accounting guidance. Edison International concluded that, as of December 31, 2017, it was not probable that the investment in SoCore Energy ($248 million at December 31, 2017) would be sold within one year, therefore the long-lived assets of SoCore Energy were not subject to held for sale accounting treatment. Under held for sale accounting treatment, the net assets of SoCore Energy would be recorded at the lower of book value or net realizable value, including transaction costs.
On January 22, 2017, the United States government announced that it will impose tariffs on imported solar cells and modules. These tariffs are expected to increase the cost of solar equipment, which is expected to adversely impact the economics of new solar projects. Subsequent to the United States government announcement, Edison International obtained bids for the sale of its interest in SoCore Energy. Edison International is in the process of negotiating the sale of its interest in SoCore Energy.  While the conclusion of the sale process cannot be assured, as a result of the current status of negotiations, Edison International expects to record a pre-tax loss of approximately $65 million (approximately $45 million on an after-tax basis) during the first quarter of 2018.


16




Loss from Continuing Operations
The following table summarizes the results of Edison International Parent and Other:
 Years ended December 31,
(in millions)2016 2015 2014
Edison Energy Group and subsidiaries1
$(38) $(6) $(5)
Edison Mission Group and subsidiaries
 32
 36
Corporate expenses and other2
(39) (39) (57)
Total Edison International Parent and Other3 
$(77) $(13) $(26)
 Years ended December 31,
(in millions)2017 2016 2015
Edison Energy Group and subsidiaries1
$(26) $(38) $(6)
Corporate expenses and other subsidiaries(421) (39) (7)
Total Edison International Parent and Other$(447) $(77) $(13)
 
Includes income of $13 million, $5 million and $9 million and $2 million in 2017, 2016, 2015 2014 related to losses (net of distributions) allocated to tax equity investors under the HLBV accounting method.
The loss from continuing operations of Edison International Parent and Other increased $370 million in 2017 compared to 2016 primarily due to:
Income tax expense of $433 million in 2017 from the re-measurement of deferred taxes as a result of Tax Reform. For further information, see "Management Overview—Tax Reform."
Higher income tax benefits related to stock option exercises of $30 million for the year ended December 31, 2017, $17 million of tax benefits recorded in 2017 from net operating loss carrybacks that resulted from the filing of the 2016 tax returns and $6 million of tax benefits recorded in 2017 related to settlement with the IRS for taxable years 2007 – 2012.
Edison Energy Group's 2017 results included HLBV income of $13 million, a $10 million after-tax goodwill impairment charge on the SoCore Energy reporting unit and net tax expense of $5 million from a change in tax law partially offset by tax benefits primarily related to stock option exercises. Edison Energy Group's 2016 results included HLBV income of $5 million, $13 million after-tax charge in 2016 from a buy-out of an earn-out provision contained in one of the 2015 acquisitions and net tax benefits of $5 million primarily related to stock option exercises. Excluding these items, Edison Energy Group net losses were $24 million in 2017 and $35 million in 2016. The reduction in these losses was due to lower expenses related to new business activities. Revenue for the Edison Energy Group was $69 million and $42 million for the years ended December 31, 2017 and 2016, respectively. The increase in revenue was primarily due to higher build transfer projects from SoCore Energy in 2017.
Includes interest expense (pre-tax) of $37 million, $31 million and $25 million in 2016, 2015, and 2014, respectively.
3
Includes income tax benefits of $15 million in 2016 related to the adoption of an accounting standard for share-based payments. See "Notes to Consolidated Financial Statements—Note 1" for further information.
The loss from continuing operations of Edison International Parent and Other increased $64 million in 2016 compared to 2015 primarily due to:
An increase in losses of Edison Energy Group of $32 million, including a $13 million after-tax charge during 2016 from a buy-out of an earn-out provision contained in one of the 2015 acquisitions,(as discussed above), higher operating and development expenses and lower revenue and gross margin from the sale of solar systems in 2016 compared to 2015. The results for the twelve months ended December 31, 2016 include the three businesses acquired by Edison Energy in December 2015 and expanded sales and support personnel. Revenue for the Edison Energy Group was $42 million and $34 million for the twelve months ended December 31, 2016 and 2015, respectively.
A decrease in income from Edison Mission Group and subsidiaries of $32 million in 2016 primarily due to income related to affordable housing projects in 2015. In December 2015, EMG'sEdison Mission Group, Inc.'s subsidiary, Edison Capital, completed the sale of its remaining affordable housing investment portfolio which represents the exit of this business activity.

1317




The loss from continuing operations of Edison International Parent and Other decreased $13 million in 2015 compared to 2014 primarily due to:
An increase in losses of Edison Energy Group primarily due to higher operating expenses for 2015. The change was partially offset by an increase in income allocated to subsidiaries of Edison Energy Group under the HLBV accounting method that resulted in losses allocated to tax equity investors. For further information, see "Management Overview—Highlights of Operating Results."
In December 2015, EMG's subsidiary, Edison Capital, completed the sale of its remaining affordable housing investment portfolio which represents the exit of this business activity. Earnings from Edison Capital were $30 million and $34 million for 2015 and 2014, respectively.
A decrease in the loss from corporate expenses and other primarily due to income tax benefits and lower corporate expenses during 2015.
Income from Discontinued Operations (Net of Tax)
Income from discontinued operations, net of tax, was $12 million, $35 million and $185 million for the years ended December 31, 2016, 2015 and 2014, respectively. The 2016 and 2015 income were primarily related to the resolution of tax issues related to EME. The 2015 income also included insurance recoveries. The 2014 income was related to the impact of completing the transactions called for in the EME Settlement Agreement and income tax benefits from resolution of uncertain tax positions and other impacts related to EME.
LIQUIDITY AND CAPITAL RESOURCES
SCE
SCE's ability to operate its business, fund capital expenditures, and implement its business strategy is dependent upon its cash flow and access to the bank and capital markets. SCE's overall cash flows fluctuate based on, among other things, its ability to recover its costs in a timely manner from its customers through regulated rates, changes in commodity prices and volumes, collateral requirements, interest obligations, dividend payments, to Edison International, and the outcome of tax and regulatory matters.
As discussed in "Management Overview," Tax Reform is expected to lower rates charged to customers which will result in less cash available to fund operations. In the next 12 months, SCE expects to fund its obligations, capital expenditures and dividends through operating cash flows, tax benefits and capital market financings of debt and preferred equity, as needed. SCE also has availability under its credit facilities to fund cash requirements.
Available Liquidity
At December 31, 2016,2017, SCE had $1.89$1.41 billion available under its $2.75 billion credit facility. The credit facility is available for borrowing needs until July 2022. In December 2017, SCE borrowed $500 million from its credit facility. On January 26, 2018, SCE repaid its $500 million borrowings with cash on hand. For further details, see "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements.Agreements" and "—Note 12. Preferred and Preference Stock of Utility."
SCE may finance balancing account undercollections and working capital requirements to support operations and capital expenditures with commercial paper, its credit facility or other borrowings, subject to availability in the bank and capital markets. To the extent necessary, SCE would utilize its available liquidity, capital market financings of debt and preferred equity or parent company contributions to SCE equity in order to meet its obligations as they become due, including any potential costs related to the December 2017 Wildfires and Montecito Mudslides (see "Management Overview—Southern California Wildfires" and "—Montecito Mudslides" for further information).
Debt Covenant
The debt covenant in SCE's credit facility limits its debt to total capitalization ratio to less than or equal to 0.65 to 1. At December 31, 2016,2017, SCE's debt to total capitalization ratio was 0.430.45 to 1.
At December 31, 2016,2017, SCE was in compliance with all other financial covenants that affect access to capital.

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Capital Investment Plan
Major Transmission Projects
A summary of SCE's largemost significant transmission and substation construction projects during the next fourthree years is presented below. The timing of the projects below is subject to timely receipt of permitting, licensing and regulatory approvals.
Project NameProject Lifecycle Phase
Direct Expenditures (in millions)1
Inception to Date (in millions)1
Scheduled In-Service DateProject Lifecycle Phase
Direct Expenditures (in millions)1
Inception to Date
(in millions)1
Scheduled In-Service Date
West of DeversConstruction$1,075$582021Construction$848$912021
Mesa SubstationConstruction$608$24
2020 2021
Construction$646$782022
Alberhill SystemLicensing$397$362021Licensing$486$372021
Riverside Transmission ReliabilityLicensing$233$52021Licensing$405$82023
Eldorado-Lugo-Mohave UpgradePlanning$269$52020Planning$233$312021
1  
Direct expenditures include direct labor, land and contract costs incurred for the respective projects and exclude overhead costs that are included in the capital expenditures forecasted for remaining investment.forecast discussed in "Management Overview—Capital Program."


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West of Devers
The West of Devers Project consists of upgrading and reconfiguring approximately 48 miles of existing 220 kV
transmission lines between the Devers, El Casco, Vista and San Bernardino substations, increasing the power transfer capabilities in support of California's renewable portfolio standards goals.
In August 2016, the CPUC approved the construction of the West of Devers Project. As a result of the delay in receipt of the Project's approval from the CPUC, SCE has deferred the forecasted timing of project capital expenditures. ORA filed an Application for Rehearing in September 2016 stating that the August 2016 decision failed to follow the California Environmental Quality Act when it approved the Project and should have approved thean alternative project with thean amended scope. SCE does not know whenIn March 2017, the CPUC will issueissued a decision on thedenying ORA's September 2016 Application for Rehearing. There is no stay of activities pending determinationThis action confirmed SCE's proposed project. In December 2017, SCE awarded the competitive bid for transmission construction, which resulted in a decrease to the expected cost of the Application for Rehearing and SCE is continuing to perform activities related to construction, such as environmental permitting and mitigation planning in order to achieve a 2021 in-service date.Project.
Mesa Substation
The Mesa Substation Project consists of demolishingreplacing the existing 220 kV Mesa Substation and constructingwith a new 500500/220 kV substation. The Mesa Substation projectProject would address reliability concerns by providing additional transmission import capability, allowing greater flexibility in the siting of new generation, and reducing the total amount of new generation required to meet local reliability needs in the Western Los Angeles Basin area. In February 2017, the CPUC issued a final decision approving the Project largely consistent with SCE's proposal and rejected alternative project configurations proposed project. Construction planning activities that had been delayed pendingby CPUC staff. In October 2017, SCE awarded the CPUC's final decision have commenced.competitive bid for the new 220kV portion of substation construction. SCE updated the expected cost of the Project due to schedule delays and scope changes. The remainder (550kV portion of substation construction) will be put out for bid by early 2019.
Alberhill System
The Alberhill System Project consists of constructing a new 500-kV substation, two 500-kV transmission lines to connect the proposed substation to the existing Serrano-Valley 500-kV transmission line, telecommunication equipment and subtransmission lines in unincorporated and incorporated portions of western Riverside County. The Project was designed to meet long-term forecasted electrical demand in the proposed Alberhill Project area and to increase electrical system reliability. In April 2016, the CPUC issued a draft environmental impact report that identified an alternative substation site. The $397 million estimated costIn April 2017, the CPUC issued a final environmental impact report for thisthe Project which rejected different alternatives recommended by CPUC staff and intervenors, selecting SCE's proposed project reflectsas the scope proposed by SCE.environmentally superior project. A final CPUC decision to approve the Project for construction is anticipated during 2018. SCE updated the total capital forecast for the Project based on the conclusion in the final environmental impact report and the timing of the extended regulatory review process.
Riverside Transmission Reliability
The Riverside Transmission Reliability Project is a joint project between SCE and Riverside Public Utilities (RPU), the municipal utility department of the City of Riverside. While RPU would be responsible for constructing some of the Project's facilities within Riverside, SCE's portion of the Project consists of constructing upgrades to its system, including a new 230-kV Substation; certain interconnection and telecommunication facilities and transmission lines in the cities of Riverside, Jurupa Valley and Norco and in portions of unincorporated Riverside County. The purpose of the Project is to provide RPU and its customers with adequate transmission capacity to serve existing and projected load, to provide for long-term system capacity for load growth, and to provide needed system reliability. 
Due to changed circumstances since the time the Project

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was originally developed, SCE informed the CPUC in JulyAugust 2016 that it supports a revised description ofrevisions to the proposed Project. The CPUC continues to collect information regarding the revised Project or other proposed revisions in support of a supplemental environmental review. Potential revisions toSCE updated the total expected cost of the Project have not been reflected in the direct expenditures or scheduled in service date in the table above, however,to include scope revisions are likely to increase the total direct expenditures and delay the completion of the Project.consistent with a revised project.
Eldorado-Lugo-Mohave Upgrade
The Eldorado-Lugo-Mohave Upgrade Project will increase capacity on existing transmission lines to allow additional renewable energy to flow from Nevada to southern California. The Project would modify SCE’sSCE's existing Eldorado, Lugo, and Mohave electrical substations to accommodate the increased current flow from Nevada to southern California; increase the power flow through the existing 500 kV transmission lines by constructing two new capacitors along the lines; raise transmission tower heights to meet ground clearance requirements; and install communication wire on our transmission lines to allow for communication between existing SCE substations. SCE has proposed an expedited schedule and a non-standard
Tehachapi
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review process with the regulatory permitting agencies in order to meet the current in-service date. During September 2017, SCE awarded the competitive bid for the Project which resulted in a decrease to the expected capital forecast for the Project.
Regulatory Proceedings
Cost of Capital
In July 2017, the CPUC issued a final decision that adopted the petition previously filed by SCE, Pacific Gas & Electric Company, SDG&E, and SoCalGas (collectively, the "Investor-Owned Utilities"), ORA, and TURN to modify the prior CPUC decisions addressing the Investor-Owned Utilities' costs of capital. The Tehachapi Project consistsdecision extended the deadline for the next Investor-Owned Utilities cost of newcapital application to April 2019, reset SCE's authorized cost of long-term debt to 4.98% and upgraded electric transmission linespreferred stock to 5.82%, and substations between eastern Kern Countyestablished SCE's authorized ROE at 10.30%, both beginning January 1, 2018. In October 2017, the CPUC approved SCE's updated debt and San Bernardino County and was undertaken to bring renewable resources in Kern County to energy consumers in the Los Angeles basin and the California energy grid. The project consists of eleven segments. Segments 1-3 were placed in service beginning in 2009 through 2013. Segments 4-11 were placed in service in December 2016.
preferred rates that SCE filed in September 2017.
FERC Formula Rate
In December 2017, the FERC issued an order setting the effective date of SCE's new formula rate as January 1, 2018, subject to settlement procedures and refund. The new formula rate results in a petition for modification withdecrease in SCE's transmission revenue requirement of $19 million or 1.6% lower than amounts authorized in 2017 rates primarily due to higher recovery of undercollections in previous periods.
Energy Efficiency Incentive Mechanism
In December 2017, the CPUC in January 2017 to update the cost estimate for all elementsawarded SCE incentives of segments 4-11 to $2.7 billion (2016 dollars) from $2.0 billion (2016 dollars) of CPUC-approved cost findings. The cost increase is based on several factors, including additional project scope, schedule delays and work stoppages due to regulatory activity, increased environmental activities, and higher costs than the historical data used for estimates. Many of the cost increases are due to external factors not contemplated when the initial cost estimates were developed and not accounted for in the CPUC's original cost findings, which had also reduced the amount of contingency significantly below SCE's original estimates. Cost recovery for nearly all transmission elements of the project is incorporated in the existing FERC rates, subject to FERC review and approval.
Coolwater-Lugo
In February 2016, SCE filed an abandoned plant recovery request at FERC for the costs of the cancelled Coolwater-Lugo transmission project pursuant to the authority granted by FERC for SCE to recover 100% of all prudently-incurred costs if the project is cancelled for reasons beyond SCE's control. The project was cancelled by the CPUC in 2015 due to a reduction in need. SCE requested recovery of the $37.1approximately $17 million, in costs that SCE incurred for the project over a twelve-month period through the FERC transmission formula rate. In December 2016, SCE reached a settlement under which it will recover 100%approximately 70% of the requested $37.1 million of costs incurred in returnaward for certain additional procedural safeguards to be implemented in all future abandoned plant recovery requests. The period for parties to file any protests to the settlement has expired without any protests filed but the settlement remains subject to FERC approval.program years 2015 and 2016.
Decommissioning of San Onofre
The decommissioning of a nuclear plant requires the management of three related activities: radiological decommissioning, non-radiological decommissioning and the management of spent nuclear fuel. The decommissioning process is expected to take many years. Decommissioning of San Onofre Unit 1 began in 1999 and major decommissioning work was completed in 2008, except for reactor vessel disposal and certain underground work that was deferred to allow for the construction of the San Onofre Independent Spent Fuel Storage Installation.Installation ("ISFSI"). The construction of the ISFSI has been completed and the transfer of spent nuclear fuel to the dry cask storage in the ISFSI has begun. The initial activity phase of radiological decommissioning of Units 2 and 3 began in June 2013 with SCE filing a certification of permanent cessation of power operations at San Onofre with the NRC. SCE is currently permitted to start major radiological decommissioning activities pursuant to NRC regulations, provided SCE obtains all necessary environmental permits for decommissioning. SCE has engaged a decommissioning general contractor to undertake a significant scope of decommissioning activities for Units 1, 2 and 3 at San Onofre.
During the second quarter of 2014,In December 2017, SCE updated its decommissioning cost estimate based on a site specific assessment.for San Onofre Units 2 and 3. The decommissioning cost estimate in 20142017 dollars is $4.4$3.4 billion (SCE share is $3.3$2.6 billion) and includes costs from June 7, 2013 through to the respective completion dates to decommission San Onofre Units 2 and 3 estimated to be in 2052.2051. The decommissioning cost estimate is subject to a number of uncertainties including the cost of disposal of nuclear waste, cost of removal of property, site remediation costs as well as a number of other assumptions and estimates, including when the federal government may remove spent fuel canisters from the San Onofre site, as to which there can be no assurance. The cost estimate is subject to change once the site specific study is final, and such changes may be material. In March 2018, SCE expects to file its 2018 NDCTP which will include the updated site specific study for San Onofre Units 2 and 3. For further information, see "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies—Nuclear Decommissioning and Asset

16




Retirement Obligations." The CPUC will conduct a reasonableness review for costs for each year. SCE's share of the decommissioning costs recorded during 20162017 were $168$236 million and are subject to reasonableness review by the CPUC.
SCE has nuclear decommissioning trust funds for San Onofre Units 2 and 3 of $2.8 billion as of December 31, 2016.2017. If the decommissioning cost estimate and assumptions regarding trust performance do not change significantly, SCE believes that future contributions to the trust funds will not be necessary.
SCE Dividends
SCE made $701$573 million and $758$701 million in dividend payments to its parent, Edison International, in 2017 and 2016, respectively. During the fourth quarter of 2017, SCE declared a dividend to Edison International of $212 million, which was paid on January 31, 2018.

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The CPUC regulates SCE's capital structure which limits the dividends it may pay Edison International. Under CPUC regulations, SCE may make distributions to Edison International as long as the common equity component of SCE's capital structure remains at or above 48% on a 13-month average basis, or otherwise satisfies the CPUC requirements. If the Revised San Onofre Settlement Agreement is approved by the CPUC, SCE may exclude the $448 million after-tax charge resulting from the implementation of the Revised San Onofre Settlement Agreement from its ratemaking capital structure. At December 31, 2017, without excluding the $448 million after-tax charge, SCE's 13-month average common equity component of total capitalization was 50.0% and 2015, respectively. the maximum additional dividend that SCE could pay to Edison International under this limitation was approximately $511 million, resulting in a restriction on net assets of approximately $14.2 billion. If the Revised San Onofre Settlement Agreement had been approved by the CPUC at December 31, 2017, the common equity component of SCE's capital structure would have been 50.1% on a 13-month average basis.
As a California corporation, SCE's ability to pay dividends is also governed by its obligations under the California General Corporation Law. California law requires that for a dividend to be declared: (a) retained earnings must equal or exceed the proposed dividend, or (b) immediately after the dividend is made, the value of the corporation's assets must exceed the value of its liabilities plus amounts required to be paid in order to liquidate stock senior to the shares receiving the dividend. Additionally, a California corporation may not declare a dividend if it is, or as a result of the dividend, would be, likely to be unable to meet its liabilities as they mature. On February 22, 2018, SCE declared a dividend to Edison International of $212 million. Prior to declaring the dividend, SCE's Board of Directors evaluated the information available, including information pertaining to the December 2017 Wildfires and Montecito Mudslides, and determined that the California law requirements for the declaration were met.
The timing and amount of future dividends are also dependent upon severalon a number of other factors including the level ofSCE's requirements to fund other obligations and capital expenditures, and its ability to access the capital markets, and generate operating cash flows and earnings. If SCE incurs significant costs for 2017 Wildfires-related damages and is unable to recover such costs through insurance or from customers or access capital markets on reasonable terms, SCE may be limited in its ability to pay future dividends to Edison International and its preferred and preference shareholders. See "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies—SCE Dividend Restrictions" for discussion of dividend restrictions.
Margin and Collateral Deposits
Certain derivative instruments, power procurement contracts and other contractual arrangements contain collateral requirements. Future collateral requirements may differ from the requirements at December 31, 2016,2017 due to the addition of incremental power and energy procurement contracts with collateral requirements, if any, and the impact of changes in wholesale power and natural gas prices on SCE's contractual obligations.
Some of the power procurement contracts contain provisions that require SCE to maintain an investment grade credit rating from the major credit rating agencies. If SCE's credit rating were to fall below investment grade, SCE may be required to pay the liability or post additional collateral.
The table below provides the amount of collateral posted by SCE to its counterparties as well as the potential collateral that would be required as of December 31, 2016.2017.
(in millions)    
Collateral posted as of December 31, 20161
 $91
Collateral posted as of December 31, 20171
 $102
Incremental collateral requirements for power procurement contracts resulting from a potential downgrade of SCE's credit rating to below investment grade 37
 35
Incremental collateral requirements for power procurement contracts resulting from adverse market price movement2
 3
 3
Posted and potential collateral requirements $131
 $140
1 
Net collateral provided to counterparties and other brokers consisted $93$101 million in letters of credit and surety bonds and $2$1 million of cash reflected in "Other current liabilities"which was offset against net derivative liabilities on the consolidated balance sheets.
2 
Incremental collateral requirements were based on potential changes in SCE's forward positions as of December 31, 20162017 due to adverse market price movements over the remaining lives of the existing power procurement contracts using a 95% confidence level.

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Regulatory Balancing Accounts
SCE's cash flows are affected by regulatory balancing accounts over-overcollections or under-collections. Over-undercollections. Overcollections and under-collectionsundercollections represent differences between cash collected in current rates for specified forecasted costs and the costs actually incurred. With some exceptions, SCE seeks to adjust rates on an annual basis or at other designated times to recover or refund the balances recorded in its balancing account. Under-accounts. Undercollections or over-collectionsovercollections in these balancing accounts impact cash flows and can change rapidly. Over-Undercollections- and under-collectionsovercollections accrue interest based on a three-month commercial paper rate published by the Federal Reserve.
As of December 31, 2016,2017, SCE had regulatory balancing account net overcollections of $1.7 billion, primarily consisting of overcollections related to the base rate revenue account and public purpose-related and energy efficiency program costs. Overcollections related to the base rate revenue account are expected to decrease as refunds are provided to customers during 2017.costs, BRRBA and TAMA. Overcollections related to public purpose-related programs are expected to decrease as costs are incurred to fund programs established by the CPUC. Overcollections related to BRRBA and TAMA are expected to decrease as refunds are provided to customers in January 2018. See "Notes to Consolidated Financial Statements—Note 10. Regulatory Assets and Liabilities" for further information.

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Edison International Parent and Other
In the next 12 months, Edison International expects to fund its obligations, capital expenditures and dividends through operating cash flows, tax benefits and capital market financings, as needed. Edison International also has availability under its credit facilities to fund cash requirements. In December 2017, Edison International declared an 11.5% increase to the annual dividend rate from $2.17 per share to $2.42 per share. On February 22, 2018, Edison International declared a dividend of $0.605 per share to be paid on April 30, 2018. Edison International Parent and Other's liquidity and its ability to pay operating expenses and pay dividends to common shareholders are dependent on dividends from SCE, realization of tax benefits, and access to the bank and capital markets.markets, and its ability to meet California law requirements for the declaration of dividends. For information on the California law requirements on the declaration of dividends, see "—SCE—SCE Dividends." Edison International intends to maintain its target payout ratio of 45% – 55% of SCE's core earnings, subject to the factors identified above. Edison International may also finance working capital requirements, payment of obligations, and capital investments, including capital contributions to subsidiaries, to fund new businesses,and common stock dividends with commercial papershort-term or other borrowings,financings, subject to availability in the bank and capital markets.
At December 31, 2016,2017, Edison International Parent had $712approximately $524 million of cash and cash equivalents and $111 million available of net borrowing capacity under its $1.25 billion multi-year revolving credit facility. In December 2017, Edison International Parent borrowed $500 million from its credit facility. The $500 million credit facility was repaid on January 26, 2018 from cash on hand. In addition, on January 26, 2018, Edison International Parent issued a $500 million term loan and the proceeds of the loan were used to pay down the commercial paper outstanding. At February 20, 2018, Edison International Parent had available liquidity of approximately $1.1 billion on its credit facility. The credit facility is available for borrowing needs until July 2022. For further details, see "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements."
The debt covenant in Edison International Parent's credit facility requires a consolidated debt to total capitalization ratio as defined in the credit agreement of less than or equal to 0.65 to 1. At December 31, 2016,2017, Edison International Parent's consolidated debt to total capitalization ratio was 0.470.51 to 1.
At December 31, 2016,2017, Edison International Parent was in compliance with all financial covenants that affect access to capital.
Net Operating Loss and Tax Credit Carryforwards
After giving effect to Tax Reform, Edison International has approximately $1,152 million$1.1 billion of tax effected net operating loss and tax credit carryforwards at December 31, 20162017 (excluding $176$77 million of unrecognized tax benefits and $242$199 million of Capistrano Wind net operating loss and tax credit carryforwards) which are available to offset future consolidated taxable income or tax liabilities (see "Notes to Consolidated Financial Statements—Note 77. Income Taxes" for further information onregarding taxes payable to Capistrano Wind). In December 2015,Tax Reform reduced the PATH Actvaluation of 2015 extended 50% bonus depreciation for qualifying property retroactive to January 1, 2015 and through 2017 and provided for 40% bonus depreciation in 2018 and 30% in 2019. As a result, realization of these tax benefits has been deferred (currently forecasted to be realized through 2021). The timing of realization of these tax benefits may be further delayed in the event of other changes in tax regulations and the value of the net operating loss carryforwards couldbut did not affect the amount of future taxable income that may be permanently reduced ifoffset. Tax Reform also will limit the utilization of NOLs arising after December 31, 2017 to 80% of taxable income with an indefinite carryforward and places limitations on the ability of regulated utilities to qualify for immediate expensing of certain capital expenditures. Tax Reform did not impact the valuation of tax reform decreasescredit carryforwards, which directly offset taxes due. As a result of the corporateforgoing, Edison International expects to realize its NOL and tax rate.credit carryforward position through 2025.

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Edison Energy Group Capital Expenditures

Forecasted capital expenditures for Edison Energy Group's commercial solar activities are estimated to be $114 million in 2017. Edison Energy Group expects to finance a majority of these expenditures through project debt and tax equity financings. For further information, see "Notes to Consolidated Financial Statements—Note 9. Investments."

Historical Cash Flows
SCE
(in millions)2016 2015 2014
Net cash provided by operating activities$3,523
 $4,624
 $3,660
Net cash (used in) provided by financing activities(219) (812) 181
Net cash used in investing activities(3,291) (3,824) (3,857)
Net increase (decrease) in cash and cash equivalents$13
 $(12) $(16)

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(in millions)2017 2016 2015
Net cash provided by operating activities$3,725
 $3,523
 $4,624
Net cash provided by (used in) financing activities243
 (219) (812)
Net cash used in investing activities(3,492) (3,291) (3,824)
Net increase (decrease) in cash and cash equivalents$476
 $13
 $(12)
Net Cash Provided by Operating Activities
The following table summarizes major categories of net cash provided by operating activities as provided in more detail in SCE's consolidated statements of cash flows for 2017, 2016 2015 and 2014.2015.
Years ended December 31, Change in cash flowsYears ended December 31, Change in cash flows
(in millions)201620152014 2016/20152015/2014201720162015 2017/20162016/2015
Net income$1,499
$1,111
$1,565
 
 $1,136
$1,499
$1,111
 
 
Non cash items1
2,108
2,231
2,381
  
Non-cash items1
3,046
2,108
2,231
  
Subtotal$3,607
$3,342
$3,946
 $265
$(604)$4,182
$3,607
$3,342
 $575
$265
Changes in cash flow resulting from working capital2
236
16
79
 220
(63)(120)236
16
 (356)220
Derivative assets and liabilities, net13
45
(40) (32)85
(28)13
45
 (41)(32)
Regulatory assets and liabilities, net(292)1,729
(358) (2,021)2,087
4
(292)1,729
 296
(2,021)
Other noncurrent assets and liabilities, net3
(41)(508)33
 467
(541)(313)(41)(508) (272)467
Net cash provided by operating activities$3,523
$4,624
$3,660
 $(1,101)$964
$3,725
$3,523
$4,624
 $202
$(1,101)
1 
Non cashNon-cash items include depreciation decommissioning and amortization, allowance for equity during construction, impairment and other charges, deferred income taxes and investment tax credits and other.
2 
Changes in working capital items include receivables, inventory, accounts payable, prepaid and accrued taxes, and other current assets and liabilities.
3 
Includes the nuclear decommissioning trusts.
Net cash provided by operating activities was impacted by the following:
Net income and noncashnon-cash items increased in 2017 by $575 million from 2016 and increased in 2016 by $265 million from 2015. The increase in 2017 was primarily due to an increase in revenue from the escalation mechanism set forth in the 2015 GRC decision and decreasedlower operation and maintenance expenses, partially offset by higher financing costs along with non-cash items. Non-cash items included changes in 2015 by $604deferred income taxes and investment tax credits of $304 million from 2014.in 2017 and $88 million in 2016. The increase in 2016 was primarily due to higher authorized revenue in 2016 from the escalation mechanism set forth in the 2015 GRC decision. The decrease in 2015 was primarily due to the implementation of the 2015 GRC decision. The factors that impacted these items are discussed under "Results of Operations—SCE—Earning Activities."
Net cash for working capital was $(120) million, $236 million and $16 million in 2017, 2016 and $79 million in 2016, 2015, and 2014, respectively. The net cash for 2017, 2016 and 2015 was primarily related to timing of disbursements ($45125 million, in 2016$45 million and $120 million in 2015)2017, 2016 and timing of receipts2015, respectively) and the decrease in receivables from customers ($230163 million, $220 million and $93 million in 2017, 2016 and 2015, respectively). Net cash for working capital also included an insurance premium payment of $121 million for additional wildfire coverage in December 2017 and changes in tax receivables and payables of $(234) million in 2017 and $(16) million in 2016 and $70 millionprimarily due to the utilization of net operating losses in 2015).2017. In addition, SCE had net tax payments of $78 million in 2016 and $144 million in 2015. The net cash in 2014 was primarily related to net tax refunds of $88 million due to net operating loss carrybacks to periods that SCE previously had taxable income.

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Net cash provided by regulatory assets and liabilities, including changes in over (under) collections of balancing accounts, was $4 million, $(292) million and $1.7 billion in 2017, 2016 and $(358) million in 2016, 2015, and 2014, respectively. SCE has a number of balancing accounts, which impact cash flows based on differences between timing of collection of amounts through rates and accrual expenditures. Cash flows were primarily impacted by the following:
2017
The 2015 GRC decision established the TAMA. As a result of this memorandum account, together with a balancing account for pole loading expenditures, 2015 – 2017 tax benefits or costs associated with certain events are tracked and adjusted annually through customer rates. Overcollections increased by $117 million during 2017 primarily due to higher tax repair deductions than forecasted in rates and $135 million of higher benefits recognized for tax accounting method changes, partially offset by a $226 million reclassification from TAMA to BRRBA to refund customers.
Higher cash due to $153 million of overcollections for the public purpose and energy efficiency programs. The increase in cash was due to lower spending than billed to customers and recovery of prior year undercollections.
Higher cash due to $136 million of overcollections related to FERC balancing accounts. The increase in cash was due to recovery of prior FERC undercollections and lower costs than previously forecasted.
Higher cash due to proceeds of approximately $34 million from the Department of Energy related to spent nuclear fuel. For further information on the spent nuclear fuel, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—Spent Nuclear Fuel."
The BRRBA tracks the differences between amounts authorized by the CPUC in the GRC proceedings and amounts billed to customers. BRRBA overcollections decreased by $226 million during 2017 primarily due to the refunds of 2015 TAMA overcollections, a revenue refund to customers of $133 million for 2012 – 2014 incremental tax benefits related to repair deductions, and 2015 overcollections resulting from the implementation of the 2015 GRC decision, which was authorized to be refunded to customers over a two year period, partially offset by a $226 million reclassification from TAMA to BRRBA to refund customers in January 2018 as discussed above.
Net undercollections for ERRA and the new system generation program were $267 million at December 31, 2017 compared to net overcollections of $26 million at December 31, 2016. Lower cash due to $293 million of net undercollections in 2017 primarily due to a refund of prior year overcollections and an increase in costs due to higher than forecasted power and gas prices experienced in 2017 and higher load requirements than forecasted in rates.
2016
Lower cash due to a decrease in ERRA overcollections for fuel and purchased power of $419 million in 2016 primarily due to the implementation of the 2016 ERRA rate decrease in January 2016, partially offset by lower than forecasted power and gas prices experienced in 2016.
The public purpose and energy efficiency programs track differences between amounts authorized by the CPUC and amounts incurred to fund programs established by the CPUC. Overcollections increased by $309 million in 2016 due to higher funding and lower spending for these programs.
SCE had a decrease in cash of approximately $182 million primarily due to a 2016 refund of 2015 overcollections resulting from the implementation of the 2015 GRC decision which was authorized to be refunded to customers over a two year period.

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2015
Higher cash due to a decrease in ERRA undercollections of $1.5 billion in 2015 primarily due to lower power and gas prices experienced in 2015, the 2015 application of 2013 and 2014 nuclear decommissioning costs refunds against ERRA undercollections and the NEIL settlement proceeds from insurance claims arising out of the failures of the San Onofre replacement steam generators. In January 2015, SCE reclassified the regulatory liability for generator settlements to ERRA to refund customers as required by the CPUC.
During 2015, BRRBA overcollections increased by $314 million primarily due to revenue previously collected from customers that was expected to be refunded as part of the 2015 GRC decision.
Overcollections for the public purpose and energy efficiency programs decreased by $191 million in 2015 primarily due to higher spending for these programs. The decrease was partially offset by an increase in funding of the new system generation program for 2015.

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The 2015 GRC Decision established a tax accounting memorandum account (referred to as "TAMA").the TAMA. As a result of this memorandum account, together with a balancing account for pole loading expenditures, any differences between the forecasted tax repair deductions and actual tax repair deductions will be adjusted through customer rates. At December 31, 2015, SCE had a regulatory liability of $248 million related to these accounts (impact of TAMA is offset in non-cash items above).
2014
During 2014, BRRBA overcollections decreased by $242 million primarily due to refunds to customers of approximately $150 million, related to the sale of Four Corners, an electric generating facility in which SCE held a 48% ownership interest, in December 2013.
Overcollections for the public purpose and energy efficiency programs decreased by $278 million in 2014, respectively, primarily due to higher spending for these programs. The decrease was partially offset by an increase in funding of the new system generation program for 2014.
During 2014, ERRA undercollections increased by $23 million primarily due to the amount and price of power and fuel being higher than forecasted. The increase was partially offset by a $540 million reclassification from regulatory liabilities to ERRA for collection of GRC revenue in excess of cost of service related to San Onofre consistent with its advice filing in November 2014.
Cash flows (used in) provided byused in other noncurrent assets and liabilities were $(41)primarily related to net earnings from nuclear decommissioning trust investments ($55 million, $(508)$45 million and $33$43 million in 2017, 2016 and 2015, and 2014, respectively. Major factors affecting cash flow related to noncurrent assets and liabilities were activities related torespectively), SCE's nuclear decommissioning trusts (principally related to the paymentpayments of decommissioning costs). Decommissioning costs of San Onofre were approximately($236 million, $168 million and $216 million in 2017, 2016 and 2015, respectively (such costs were recorded as a reductionrespectively) and changes in uncertain tax positions due to the utilization of SCE's asset retirement obligation)net operating losses ($(98) million and $104 million in 2017 and 2016, respectively).

20




See "Nuclear Decommissioning Activities" below for further discussion.
Net Cash Provided by (Used in) Provided by Financing Activities
The following table summarizes cash provided by financing activities for 2017, 2016 2015 and 2014.2015. Issuances of debt and preference stock are discussed in "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements—Long-Term Debt" and "—Note 12. Preferred and Preference Stock of Utility."
(in millions)2016 2015 20142017 2016 2015
Issuances of first and refunding mortgage bonds, net$
 $1,287
 $498
Issuances of pollution control bonds, net and other
 126
 
Issuances of first and refunding mortgage bonds, net of premium (discount) and issuance costs$1,011
 $
 $1,287
Issuance of term loan300
 
 
Remarketing and issuances of pollution control bonds, net of issuance costs134
 
 126
Long-term debt matured or repurchased(217) (761) (607)(882) (217) (761)
Short-term debt financing, net719
 (619) 490
Issuances of preference stock, net294
 319
 269
Issuances of preference stock, net of issuance costs462
 294
 319
Redemptions of preference stock(475) (125) (325)
Short-term debt borrowings, net of repayments and discount469
 719
 (619)
Payments of common stock dividends to Edison International(701) (758) (378)(573) (701) (758)
Redemptions of preference stock(125) (325) 
Payments of preferred and preference stock dividends(123) (116) (111)(124) (123) (116)
Other(66) 35
 20
(79) (66) 35
Net cash (used in) provided by financing activities$(219) $(812) $181
Net cash provided by (used in) financing activities$243
 $(219) $(812)
Net Cash Used in Investing Activities
Cash flows used in investing activities are primarily due to capital expenditures and funding of nuclear decommissioning trusts. Capital expenditures were $3.7 billion for 2017, $3.6 billion for 2016 and $4.2 billion for 2015, and $3.9 billion for 2014, primarily related to transmission distribution and generation investments. The decrease in capital expenditures during 2016 was primarily due to lower FERC capital spending. Net proceeds (purchases)SCE had a net redemption of nuclear decommissioning trust investments wereof $197 million, $179 million and $374 million in 2017, 2016 and $(44) million for 2016, 2015, and 2014, respectively. See "Nuclear Decommissioning Trusts"Activities" below for further discussion. The 2016 net proceeds from sale of nuclear decommissioning trust investments was used to fund decommissioning costs less net earnings during the period. The 2015 net proceeds from sale of nuclear decommissioning trust investments was used to fund 2013, 2014 and a portion of 2015 decommissioning costs less net earnings during the period. The 2014 net purchase of nuclear decommissioning trust investments was due to net earnings during the period. In addition, during the third quarter of2017 and 2016, SCE received proceeds of $26 million and $140 million, respectively, for a loanloans on the cash surrender value of life insurance policies. The proceeds were used for general corporate purposes.
Nuclear Decommissioning TrustsActivities
SCE's statement of cash flows includes nuclear decommissioning activities, of the Nuclear Decommissioning Trusts which are reflected in the following line items:
(in millions)2016 2015 20142017 2016 2015
Net cash (used in) provided by operating activities:
Nuclear decommissioning trusts
$(179) $(428) $39
Net cash flow from investing activities:
Proceeds from sale of investments
3,212
 3,506
 2,617
Net cash used in operating activities:
Net earnings from nuclear decommissioning trust investments
$55
 $45
 $43
SCE's decommissioning costs(236) (168) (216)
Net cash provided by investing activities:
Proceeds from sale of investments
5,239
 3,212
 3,506
Purchases of investments(3,033) (3,132) (2,661)(5,042) (3,033) (3,132)
Net cash impact$
 $(54) $(5)$16
 $56
 $201

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Net cash (used in) provided byused in operating activities of the nuclear decommissioning trusts relate to interest and dividends less administrative expenses, taxes, and SCE's decommissioning costs. See "Notes to Consolidated Financial Statements—Note 9. Investments" for further information. SuchInvesting activities represent the source (use)purchase and sale of the funds for investing activities. The net cash impact represents the contributions made by SCE toinvestments within the nuclear decommissioning trusts. During 2015, SCE made a contributiontrusts, including the reinvestment of $54 million to the non-qualifiedearnings from nuclear decommissioning trust related to tax benefits received and pursuant to a CPUC decision related to decommissioning costs for San Onofre Unit 1.investments.
In future periods, decommissioning costs of San Onofre will increase significantly. Beginning in March 2016, funds for decommissioning costs are requested from the nuclear decommissioning trusts one month in advance. Decommissioning disbursements are funded from sales of investments of the nuclear decommissioning trusts. See "Notes to Consolidated Financial Statements—Note 9. Investments" for further information. The net cash impact reflects timing of decommissioning payments ($236 million, $168 million and $216 million in 2017, 2016 and 2015, respectively) and reimbursements to SCE from the nuclear decommissioning trust ($252 million, $224 million and $471 million in 2017, 2016 and 2015, respectively). The 2016 net cash impact included reimbursements for 2016 and a portion of 2015, 2014, and 2013 decommissioning costs. The 2015 net cash impact included reimbursements for 2015, 2014, and 2013 decommissioning costs. In addition, during 2015, SCE made a contribution of $54 million to the non-qualified decommissioning trust related to tax benefits received and pursuant to a CPUC decision related to decommissioning costs for San Onofre Unit 1.

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Edison International Parent and Other
The table below sets forth condensed historical cash flow from operations for Edison International Parent and Other.
(in millions)2016 2015 20142017 2016 2015
Net cash used in operating activities$(267) $(115) $(412)$(138) $(267) $(115)
Net cash provided by financing activities314
 224
 464
764
 314
 224
Net cash used in investing activities(125) (68) (50)(107) (125) (68)
Net (decrease) increase in cash and cash equivalents$(78) $41
 $2
Net increase (decrease) in cash and cash equivalents$519
 $(78) $41
Net Cash Used in Operating Activities
Net cash used in operating activities decreased in 2017 by $129 million from 2016 and increased in 2016 by $152 million from 2015 and decreased in 2015 by $297 million from 2014 due to:
$214 million $204 million and $225$204 million of cash payments made to the Reorganization Trust in September 2016 Septemberand 2015, and April 2014, respectively, related to the EME Settlement Agreement. See "Notes to Consolidated Financial Statements—Note 15. Discontinued Operations—EME Chapter 11 Bankruptcy" for further information.
$143 million receipt of intercompany tax-allocation payments in 2015 and a $189 million deposit made with the IRS in 2014 related to open tax years 2003 through 2006.
$21 million outflow in June 2016 related to the buy-out of an earn-out provision with the former shareholders of a company acquired by Edison Energy in 2015. See "Results of Operations—Edison International Parent and Other—Loss from Continuing Operations" for further information.
$32143 million receipt of intercompany tax-allocation payments in 2015.
$138 million, $32 million and $54 million cash outflow from operating activities in 2017, 2016 compared to $54 million cash inflow inand 2015, and $2 million cash outflow in 2014,respectively, due to timing of payments and receipts relating to interest and operating costs. In addition, the cash outflow in 2017 included higher pension payments related to executive retirement plans.
Net Cash Provided by Financing Activities
Net cash provided by financing activities were as follows:
(in millions) 2016 2015 2014 2017 2016 2015
Dividends paid to Edison International common shareholders $(626) $(544) $(463) $(707) $(626) $(544)
Dividends received from SCE 701
 758
 378
 573
 701
 758
Payment for stock-based compensation (110) (119) (106)
Receipt from stock option exercises 59
 67
 66
Long-term debt issuance, net 397
 7
 (4)
Short-term debt financing, net (108) 47
 589
Payment for stock-based compensation, net of receipt from stock option exercises (140) (51) (52)
Long-term debt issuance, net of discount and issuance costs 788
 397
 7
Long-term debt repayment (403) (3) (1)
Short-term debt borrowings, net of repayments and discount 615
 (108) 47
Other 1
 8
 4
 38
 4
 9
Net cash provided by financing activities $314
 $224
 $464
 $764
 $314
 $224

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Net Cash Used in Investing Activities
Net cash used in investing activities relates to Edison Energy Group's capital expenditures primarily for commercial solar installations ($10188 million, in 2016,$101 million and $15 million in 2017, 2016 and 2015, and $49 million in 2014)respectively). In addition, the cash outflow in 2017 included $24 million of restricted cash related to funds held by SoCore Energy and its consolidated affiliates pursuant to project financing or purchase agreements. The cash outflow in 2015 was also due to the acquisitions of three companies for approximately $100 million to support Edison Energy Group's commercial and industrial services growth strategy. See "Notes to Consolidated Financial Statements—Note 9. Investments" for further information.

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Contractual Obligations and Contingencies
Contractual Obligations
Edison International Parent and Other and SCE's contractual obligations as of December 31, 2016,2017, for the years 20172018 through 20212022 and thereafter are estimated below.
(in millions)Total 
Less than
1 year
 1 to 3 years 3 to 5 years 
More than
5 years
Total 
Less than
1 year
 1 to 3 years 3 to 5 years 
More than
5 years
SCE:                  
Long-term debt maturities and interest1
$18,801
 $1,044
 $1,442
 $1,509
 $14,806
$20,060
 $967
 $1,103
 $1,844
 $16,146
Power purchase agreements:2
         39,877
 2,513
 5,127
 5,144
 27,093
Renewable energy contracts31,199
 1,516
 3,310
 3,562
 22,811
Qualifying facility contracts530
 187
 235
 55
 53
Other power purchase agreements4,039
 769
 1,120
 892
 1,258
Other operating lease obligations3
443
 52
 83
 50
 258
246
 48
 64
 35
 99
Purchase obligations:4
                  
Other contractual obligations1,211
 156
 244
 180
 631
704
 127
 141
 91
 345
Total SCE5,6,7
56,223
 3,724
 6,434
 6,248
 39,817
60,887
 3,655
 6,435
 7,114
 43,683
Edison International Parent and Other:                  
Long-term debt maturities and interest1
925
 426
 32
 28
 439
1,370
 35
 462
 459
 414
Total Edison International Parent and Other5
925
 426
 32
 28
 439
1,370
 35
 462
 459
 414
Total Edison International6,7
$57,148
 $4,150
 $6,466
 $6,276
 $40,256
$62,257
 $3,690
 $6,897
 $7,573
 $44,097
1 
For additional details, see "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements." Amount includes interest payments totaling $8.36$9.07 billion and $93$141 million over applicable period of the debt for SCE and Edison International Parent and Other, respectively.
2 
Certain power purchase agreements entered into with independent power producers are treated as operating or capital leases. For further discussion, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies."
3 
At December 31, 2016,2017, SCE's minimum other operating lease payments were primarily related to vehicles, office space and other equipment. For further discussion, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies."
4 
For additional details, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies." At December 31, 2016,2017, other commitments were primarily related to maintaining reliability and expanding SCE's transmission and distribution system and capacity reductionnuclear fuel supply contracts.
5 
At December 31, 2016,2017, Edison International Parent and Other and SCE had estimated contributions to the pension and PBOP plans. SCE estimated contributions are $106$62 million, $106$54 million, $115$47 million, $157$42 million and $160$39 million in 2017, 2018, 2019, 2020, 2021 and 2021,2022, respectively, which are excluded from the table above. Edison International Parent and Other estimated contributions are $51$16 million, $24 million, $18 million, $28 million, $26$21 million and $26$15 million for the same respective periods and are excluded from the table above. These amounts represent estimates that are based on assumptions that are subject to change. See "Notes to Consolidated Financial Statements—Note 8. Compensation and Benefit Plans" for further information.
6 
At December 31, 2016,2017, Edison International and SCE had a total net liability recorded for uncertain tax positions of $471$432 million and $371$331 million, respectively, which is excluded from the table. Edison International and SCE cannot make reliable estimates of the cash flows by period due to uncertainty surrounding the timing of resolving these open tax issues with the tax authorities.
7 
The contractual obligations table does not include derivative obligations and asset retirement obligations, which are discussed in "Notes to Consolidated Financial Statements—Note 6. Derivative Instruments," and "—Note 1. Summary of Significant Accounting Policies" and "—Note 9. Investments," respectively.

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Contingencies
SCE has contingencies related to San Onofre Related Matters, Long Beach Service Interruptions, Nuclear Insurance, Wildfire InsuranceDecember 2017 Wildfires, and Spent Nuclear Fuel, which are discussed in "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies."


Environmental Remediation
For a discussion of SCE's environmental remediation liabilities, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—Environmental Remediation."
Off-Balance Sheet Arrangements
SCE has variable interests in power purchase contracts with variable interest entities and a variable interest in unconsolidated Trust I, Trust II, Trust III, Trust IV, Trust V and Trust VVI that issued $475 million (aggregate liquidation preference) of 5.625%, $400 million (aggregate liquidation preference) of 5.10%, $275 million (aggregate liquidation preference) of 5.75%, $325 million (aggregate liquidation preference) of 5.375% and, $300 million (aggregate liquidation preference) of 5.45% and $475 million (aggregate liquidation preference) of 5.00%, trust securities, respectively, to the public, see "Notes to Consolidated Financial Statements—Note 3. Variable Interest Entities."
Environmental Developments
For a discussion of environmental developments, see "Business—Environmental Regulation of Edison International and Subsidiaries.Considerations."
MARKET RISK EXPOSURES
Edison International's and SCE's primary market risks include fluctuations in interest rates, commodity prices and volumes, and counterparty credit. Derivative instruments are used to manage market risks including market risks of SCE's customers. For a further discussion of market risk exposures, including commodity price risk, credit risk and interest rate risk, see "Notes to Consolidated Financial Statements—Note 6. Derivative Instruments" and "—Note 4. Fair Value Measurements."
Interest Rate Risk
Edison International and SCE are exposed to changes in interest rates primarily as a result of its financing, investing and borrowing activities used for liquidity purposes, and to fund business operations and capital investments. The nature and amount of Edison International and SCE's long-term and short-term debt can be expected to vary as a result of future business requirements, market conditions and other factors. Fluctuations in interest rates can affect earnings and cash flows. Changes in interest rates may impact SCE's authorized rate of return for the period beyond 2017, see "Business—SCE—Overview of Ratemaking Process" for further discussion. The following table summarizes the increase or decrease to the fair value of long-term debt including the current portion as of December 31, 2016,2017, if the market interest rates were changed while leaving all other assumptions the same:
(in millions)Carrying Value Fair Value 10% Increase 10% DecreaseCarrying Value Fair Value 10% Increase 10% Decrease
Edison International$11,156
 $12,368
 $11,892
 $12,876
$12,123
 $13,760
 $13,239
 $14,308
SCE10,333
 11,539
 11,070
 12,040
10,907
 12,547
 12,039
 13,082
Commodity Price Risk
SCE and its customers are exposed to the risk of a change in the market price of natural gas, electric power and transmission congestion. SCE's hedging program is designed to reduce exposure to variability in market prices related to SCE's purchases and sales of electric power and natural gas. SCE expects recovery of its related hedging costs through the ERRA balancing account or CPUC-approved procurement plans, and as a result, exposure to commodity price is not expected to impact earnings, but may impact timing of cash flows. As part of this program, SCE enters into energy options, swaps, forward arrangements, tolling arrangements, and congestion revenue rights ("CRRs"). The transactions are pre-approved by the CPUC or executed in compliance with CPUC-approved procurement plans.
Fair Value of Derivative Instruments
The fair value of derivative instruments is included in the consolidated balance sheets unless subject to an exception under the applicable accounting guidance. Realized gains and losses from derivative instruments are expected to be recovered from or refunded to customers through regulatory mechanisms and, accordingly, changes in SCE's fair value have no impact on earnings. SCE does not use hedge accounting for these transactions due to this regulatory accounting treatment. For further

28




discussion on fair value measurements and the fair value hierarchy, see "Notes to Consolidated Financial StatementsNote 4. Fair Value Measurements."

24




The fair value of outstanding derivative instruments used to mitigate exposure to commodity price risk was a net liability of $1.1 billion and $1.2 billion at December 31, 20162016. During the third quarter of 2017, SCE designated certain derivative contracts as normal purchase and 2015, respectively. normal sale contracts, which resulted in a reclassification of $914 million from derivative liabilities to other liabilities. These liabilities will be amortized over the remaining contract terms. The fair value of remaining derivative instruments at December 31, 2017 was a net asset of $109 million.
The following table summarizes the increase or decrease to the fair values of the net liability of derivative instruments included in the consolidated balance sheets as of December 31, 2016,2017, if the electricity prices or gas prices were changed while leaving all other assumptions constant:
(in millions)December 31, 2016
December 31, 2017
Increase in electricity prices by 10%$112
$11
Decrease in electricity prices by 10%(92)(11)
Increase in gas prices by 10%(36)10
Decrease in gas prices by 10%43
(5)
Credit Risk
For information related to credit risks, see "Notes to Consolidated Financial Statements—Note 6. Derivative Instruments."
Credit risk exposure from counterparties for power and gas trading activities is measured as the sum of net accounts receivable (accounts receivable less accounts payable) and the current fair value of net derivative assets (derivative assets less derivative liabilities) reflected on the consolidated balance sheets. SCE enters into master agreements which typically provide for a right of setoff. Accordingly, SCE's credit risk exposure from counterparties is based on a net exposure under these arrangements. SCE manages the credit risk on the portfolio for both rated and non-rated counterparties based on credit ratings using published ratings of counterparties and other publicly disclosed information, such as financial statements, regulatory filings, and press releases, to guide it in the process of setting credit levels, risk limits and contractual arrangements, including master netting agreements.
As of December 31, 2016,2017, the amount of balance sheet exposure as described above broken down by the credit ratings of SCE's counterparties, was as follows:
December 31, 2016December 31, 2017
(in millions)
Exposure2
 Collateral Net Exposure
Exposure2
 Collateral Net Exposure
S&P Credit Rating1
          
A or higher$74
 $(3) $71
$110
 $
 $110
1 
SCE assigns a credit rating based on the lower of a counterparty's S&P, Fitch or Moody's Investors Service rating. For ease of reference, the above table uses the S&P classifications to summarize risk, but reflects the lower of the three credit ratings.
2 
Exposure excludes amounts related to contracts classified as normal purchases and sales and non-derivative contractual commitments that are not recorded on the consolidated balance sheets, except for any related net accounts receivable.
CRITICAL ACCOUNTING ESTIMATES AND POLICIES
The accounting policies described below are considered critical to obtaining an understanding of Edison International and SCE's consolidated financial statements because their application requires the use of significant estimates and judgments by management in preparing the consolidated financial statements. Management estimates and judgments are inherently uncertain and may differ significantly from actual results achieved. Management considers an accounting estimate to be critical if the estimate requires significant assumptions and changes in the estimate or, the use of alternative estimates, could have a material impact on Edison International's results of operations or financial position. For more information on Edison International's accounting policies, see "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies."

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Rate Regulated Enterprises
Nature of Estimate Required.    SCE follows the accounting principles for rate-regulated enterprises which are required for entities whose rates are set by regulators at levels intended to recover the estimated costs of providing service, plus a return on net investment, or rate base. Regulators may also impose certain penalties or grant certain incentives. Due to timing and other differences in the collection of revenue, these principles allow a cost that would otherwise be charged as an expense by an unregulated entity to be capitalized as a regulatory asset if it is probable that such cost is recoverable through future rates; conversely the principles allow creation of a regulatory liability for amounts collected in rates to recover costs expected to be incurred in the future or amounts collected in excess of costs incurred and are refundable to customers.

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In November 2014, the CPUC approved the San Onofre OII Settlement Agreement, which resolved the CPUC's investigation regarding the steam generator replacement project at San Onofreaddition, SCE recognizes revenue and the related outages and subsequent shutdown of San Onofre. In a December 2016 joint ruling, the Assigned Commissioner and the Assigned ALJ expressed concerns about the extent to which the failure to timely report ex parte communications had impacted the settlement negotiations and directed SCE to meet and confer with the other parties in the OII to consider changing the terms of the San Onofre OII Settlement Agreement.
In November 2015, SCE received the 2015 GRC decision. As part of this decision, the CPUC adopted a rate base offset associated with forecasted tax repair deductions during 2012 – 2014. The 2015 rate base offset is $324 million and amortizes on a straight line basis over 27 years. As a result of the rate base offset included in the final decision, SCE recorded an after tax charge of $382 million during the fourth quarter of 2015 to write down the regulatory assets previously recordedfrom alternative revenue programs, which enables the utility to adjust future rates in response to past activities or completed events, if certain criteria are met, even for recoveryprograms that do not qualify for recognition of deferred income taxes related to 2012 – 2014 incremental tax repair deductions."traditional" regulatory assets and liabilities.
Key Assumptions and Approach Used.    SCE's management assesses at the end of each reporting period whether regulatory assets are probable of future recovery by considering factors such as the current regulatory environment, the issuance of rate orders on recovery of the specific or a similar incurred cost to SCE or other rate-regulated entities, and other factors that would indicate that the regulator will treat an incurred cost as allowable for ratemaking purposes. Using these factors, management has determined that existing regulatory assets and liabilities are probable of future recovery or settlement. This determination reflects the current regulatory climate and is subject to change in the future. SCE's judgment that the San Onofre Regulatory Asset recorded at December 31, 2016 is probable, though not certain, of recovery is based on SCE's knowledge of the facts and judgment in applying the relevant regulatory principles to the issue. Such judgment is subject to uncertainty, and regulatory principles and precedents are not necessarily binding and are capable of interpretation. SCE has recorded a regulatory asset to reflect the expected recoveries under the San Onofre OII Settlement Agreement. At
December 31, 2016, $857 million remains to be collected.
Effect if Different Assumptions Used.    Significant management judgment is required to evaluate the anticipated recovery of regulatory assets, the recognition of incentives and revenue subject to refund, as well as the anticipated cost of regulatory liabilities or penalties. If future recovery of costs ceases to be probable, all or part of the regulatory assets and liabilities would have to be written off against current period earnings. At December 31, 2016,2017, the consolidated balance sheets included regulatory assets of $7.8$5.6 billion and regulatory liabilities of $6.5$9.7 billion. If different judgments were reached on recovery of costs and timing of income recognition, SCE's earnings may vary from the amounts reported.
Application to Tax Reform
As discussed in "Management Overview—Tax Reform," in December 2017, Tax Reform was signed into law. This comprehensive reform of tax law reduces the federal corporate income tax rate from 35% to 21% and is generally effective beginning January 1, 2018. US GAAP requires deferred tax assets and liabilities to be measured at the enacted tax rate expected to apply when temporary differences are to be realized or settled. Thus, at the date of enactment, the deferred taxes were re-measured based upon the new tax rate. The re-measurement of SCE's deferred taxes was recorded against regulatory assets and liabilities when the pre-tax amounts giving rise to deferred tax assets and liabilities were funded by customers and were recorded to earnings when amounts were funded by shareholders.
The CPUC and FERC regulatory processes that will be utilized to return SCE's excess deferred taxes applicable to customers have not been determined. In the absence of regulatory guidance, judgment is required to estimate which deferred tax re-measurements will be refunded to customers and are subject to change based on the outcome of the regulatory processes.
At December 31, 2017, the implementation of Tax Reform at SCE resulted in a reduction of deferred tax liabilities and an increase in regulatory liabilities of approximately $5.0 billion. Changes in the allocation to customers of the deferred tax re-measurement will be reflected in the financial statements and adjusted prospectively as information becomes available through the regulatory process. Amounts to be refunded to customers are expected to generally be refunded over the life of the underlying asset or liability that gave rise to the deferred taxes.
Income Taxes
Nature of Estimates Required.    As part of the process of preparing its consolidated financial statements, Edison International and SCE are required to estimate income taxes for each jurisdiction in which they operate. This process involves estimating actual current period tax expense together with assessing temporary differences resulting from differing treatment of items, such as depreciation, for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within Edison International and SCE's consolidated balance sheets, including net operating loss and tax credit carryforwards that can be used to reduce liabilities in future periods.
Edison International and SCE take certain tax positions they believe are in accordance with the applicable tax laws. However, these tax positions are subject to interpretation by the IRS, state tax authorities and the courts. Edison International and SCE determine uncertain tax positions in accordance with the authoritative guidance.

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Key Assumptions and Approach Used.    Accounting for tax obligations requires management judgment. Edison International and SCE's management use judgment in determining whether the evidence indicates it is more likely than not, based solely on the technical merits, that a tax position will be sustained, and to determine the amount of tax benefits to be recognized. Judgment is also used in determining the likelihood a tax position will be settled and possible settlement outcomes. In assessing uncertain tax positions Edison International and SCE consider, among others, the following factors: the facts and circumstances of the position, regulations, rulings, and case law, opinions or views of legal counsel and other advisers, and the experience gained from similar tax positions. Edison International and SCE's management evaluates uncertain tax positions at the end of each reporting period and makes adjustments when warranted based on changes in fact or law.

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Effect if Different Assumptions Used.    Actual income taxes may differ from the estimated amounts which could have a significant impact on the liabilities, revenue and expenses recorded in the financial statements. Edison International and SCE continue to be under audit or subject to audit for multiple years in various jurisdictions. Significant judgment is required to determine the tax treatment of particular tax positions that involve interpretations of complex tax laws. Such liabilities are based on judgment and a final determination could take many years from the time the liability is recorded. Furthermore, settlement of tax positions included in open tax years may be resolved by compromises of tax positions based on current factors and business considerations that may result in material adjustments to income taxes previously estimated.
Nuclear Decommissioning – Asset Retirement Obligation
Key Assumptions and Approach Used.    The liability to decommission SCE's nuclear power facilities is based on decommissioning studies performedan updated cost estimate in 20132017 for Palo Verde, anda decommissioning study performed in 2014 for San Onofre UnitsUnit 1 and an updated cost estimate in 2017 for San Onofre 2 and 3. See "Liquidity and Capital Resources—SCE—Decommissioning of San Onofre" for further discussion of the plans for decommissioning of San Onofre. SCE estimates that it will spend approximately $6.3$7.2 billion undiscounted through 2079 to decommission its nuclear facilities. San Onofre Units 1, 2 and 3 decommissioning cost estimates are updated in each Nuclear Decommissioning Triennial Proceeding. Palo Verde decommissioning cost estimates are updated every three years by the operating agent, Arizona Public Services.
The current ARO estimates for San Onofre and Palo Verde are based on the assumptions from these decommissioning studies:studies and revised based on the latest cost estimates:
Decommissioning Costs. The estimated costs for labor, "material, equipment and other," and low-level radioactive waste costs are included in each of the NRC decommissioning stages; license termination, site restoration, and spent fuel storage. The ARO for decommissioning San Onofre Units 2 and 3 was updated in 2017 after onboarding the decommissioning general contractor.
Escalation Rates. Annual escalation rates are used to convert the decommissioning cost estimates in base year dollars to decommissioning cost estimates in future-year dollars. Escalation rates are primarily used for labor, material, equipment, and low level radioactive waste burial costs. SCE's current estimates are based upon SCE's decommissioning cost methodology used for ratemaking purposes. Average escalation rates range from 1.7%1.6% to 7.5% (depending on the cost element) annually.
Timing. Cost estimates for Palo Verde are based on an assumption that decommissioning will commence promptly after the current NRC operating licenses expire. The Palo Verde 1, 2, 3 operating licenses currently expire in 2045, 2046 and 2047 respectively. San Onofre Unit 1 started decommissioning in 1998 and Units 2 and 3 began in 2013. Cost estimates for San Onofre Units are currently based on completion of decommissioning activities by 2052.2051.
Spent Fuel Dry Storage Costs. Cost estimates are based on an assumption that the DOE will begin to take spent fuel from the nuclear industry in 2024,2028, and will remove the last spent fuel from the San Onofre and Palo Verde sites by 20512049 and 2075, respectively. Costs for spent fuel monitoring are included until 2051 and 2075,2078, respectively.
Changes in Decommissioning Technology, Regulation, and Economics. The current cost studies assume the use of current technologies under current regulations and at current cost levels.
Effect if Different Assumptions Used.   The ARO for decommissioning SCE's nuclear facilities was $2.5$2.6 billion as of December 31, 2016,2017, based on the decommissioning studies performed in 2013 for Palo Verde and in 2014 for San Onofre Units 1, 2 and 3.the subsequent cost estimate updates. Changes in the estimated costs, execution strategy or timing of decommissioning, or in the assumptions and judgments by management underlying these estimates, could cause material revisions to the estimated total cost to decommission these facilities which could have a material effect on the recorded liability. The AROSCE expects to file its 2018 NDTCP for decommissioning San Onofre Units 2 &and 3 is expectedin March 2018 which may result in a revision to be updated after onboarding the currently reflected decommissioning general contractor and the subsequent development of a new decommissioning cost estimate during 2017.liability.

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The following table illustrates the increase to the ARO liability if the cost escalation rate was adjusted while leaving all other assumptions constant:
(in millions)
Increase to ARO and
Regulatory Asset at
December 31, 2016
Increase to ARO and
Regulatory Asset at
December 31, 2017
Uniform increase in escalation rate of 1 percentage point$481
$616
The increase in the ARO liability driven by an increase in the escalation rate would result in a decrease in the regulatory liability for recoveries in excess of ARO liabilities.

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Pensions and Postretirement Benefits Other than Pensions ("PBOP(s)")
Nature of Estimate Required.    Authoritative accounting guidance requires companies to recognize the overfunded or underfunded status of defined benefit pension and other postretirement plans as assets and liabilities in the balance sheet; the assets and/or liabilities are normally offset through other comprehensive income (loss). In accordance with authoritative guidance for rate-regulated enterprises, regulatory assets and liabilities are recorded instead of charges and credits to other comprehensive income (loss) for its postretirement benefit plans that are recoverable in utility rates. Edison International and SCE have a fiscal year-end measurement date for all of its postretirement plans.
Key Assumptions of Approach Used.    Pension and other postretirement benefit obligations and the related effects on results of operations are calculated using actuarial models. Two critical assumptions, discount rate and expected return on assets, are important elements of plan expense, and the discount rate is important to liability measurement. Additionally, health care cost trend rates are critical assumptions for postretirement health care plans. These critical assumptions are evaluated at least annually. Other assumptions, which require management judgment, such as rate of compensation increases and rates of retirement and turnover, are evaluated periodically and updated to reflect actual experience.
As of December 31, 2016,2017, Edison International's and SCE's pension plans had a $4.3$4.2 billion and $3.8$3.7 billion benefit obligation, respectively, and total 20162017 expense for these plans was $101$92 million and $93$75 million, respectively. As of December 31, 2016,2017, the benefit obligation for both Edison International's and SCE's PBOP plans were $2.3 billion, and total 20162017 expense for Edison International's and SCE's plans was $20 million and $19 million, respectively.$5 million. Annual contributions made to most of SCE's pension plans are currently recovered through CPUC-approved regulatory mechanisms and are expected to be, at a minimum, equal to the related annual expense.
Pension expense is recorded for SCE based on the amount funded to the trusts, as calculated using an actuarial method required for ratemaking purposes, in which the impact of market volatility on plan assets is recognized in earnings on a more gradual basis. Any difference between pension expense calculated in accordance with ratemaking methods and pension expense calculated in accordance with authoritative accounting guidance for pension is accumulated as a regulatory asset or liability, and is expected, over time, to be recovered from or returned to customers. As of December 31, 2016,2017, this cumulative difference amounted to a regulatory asset of $95$123 million, meaning that the accounting method has recognized more in expense than the ratemaking method since implementation of authoritative guidance for employers' accounting for pensions in 1987.
Edison International and SCE used the following critical assumptions to determine expense for pension and other postretirement benefit for 2016:2017:
(in millions)
Pension
Plans
Postretirement
Benefits Other
than Pensions
Pension
Plans
Postretirement
Benefits Other
than Pensions
Discount rate1
4.18%4.55%3.94%4.29%
Expected long-term return on plan assets2
7.00%5.60%6.50%5.30%
Assumed health care cost trend rates3
*
7.50%*
7.00%
* 
Not applicable to pension plans.
1 
The discount rate enables Edison International and SCE to state expected future cash flows at a present value on the measurement date. Edison International and SCE select its discount rate by performing a yield curve analysis. This analysis determines the equivalent discount rate on projected cash flows, matching the timing and amount of expected benefit payments. The AON-Hewitt yield curve is considered in determining the discount rate.

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2 
To determine the expected long-term rate of return on pension plan assets, current and expected asset allocations are considered, as well as historical and expected returns on plan assets. A portion of PBOP trusts asset returns are subject to taxation, so the 5.6%5.3% rate of return on plan assets above is determined on an after-tax basis. Actual time-weighted, annualized returns on the pension plan assets were 8.5%15.1%, 9.7% and 5.8%6.4% for the one-year, five-year and ten-year periods ended December 31, 2016,2017, respectively. Actual time-weighted, annualized returns on the PBOP plan assets were 7.0%14.1%, 9.5% and 5.0%5.7% over these same periods. Accounting principles provide that differences between expected and actual returns are recognized over the average future service of employees.
3 
The health care cost trend rate gradually declines to 5.0% for 2022 and beyond.

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As of December 31, 2016,2017, Edison International and SCE had unrecognized pension costs of $666$347 million and $598$292 million, and unrecognized PBOP costsgains of $140$22 million and $136$26 million, respectively. The unrecognized pension costs and PBOP costsgains primarily consisted of the cumulative impact of the reduced discount rates on the respective benefit obligations and the cumulative difference between the expected and actual rate of return on plan assets. Of these deferred costs $479(gains), $271 million of SCE's pension costs and $33$(26) million of SCE's PBOP costsgains are recorded as regulatory assets and isregulatory liabilities, respectively, and are expected to be recovered (refunded) over the average expected future service of employees.
Edison International's and SCE's pension and PBOP plans are subject to limits established for federal tax deductibility. SCE funds its pension and PBOP plans in accordance with amounts allowed by the CPUC. Executive pension plans have no plan assets.
Effect if Different Assumptions Used.    Changes in the estimated costs or timing of pension and other postretirement benefit obligations, or the assumptions and judgments used by management underlying these estimates, could have a material effect on the recorded expenses and liabilities.
The following table summarizes the increase or (decrease) to projected benefit obligation for pension and the accumulated benefit obligation for PBOP if the discount rate were changed while leaving all other assumptions constant:
Edison International SCEEdison International SCE
(in millions)Increase in discount rate by 1% Decrease in discount rate by 1% Increase in discount rate by 1% Decrease in discount rate by 1%Increase in discount rate by 1% Decrease in discount rate by 1% Increase in discount rate by 1% Decrease in discount rate by 1%
Change to projected benefit obligation for pension$(422) $513
 $(365) $444
$(381) $463
 $(342) $417
Change to accumulated benefit obligation for PBOP(319) 372
 (318) 370
(328) 382
 (327) 380
A one percentage point increase in the expected rate of return on pension plan assets would decrease Edison International's and SCE's current year expense by $31$33 million and $29$31 million, respectively, and a one percentage point increase in the expected rate of return on PBOP plan assets would decrease both Edison International's and SCE's current year expense by $20$21 million.
The following table summarizes the increase or (decrease) to accumulated benefit obligation and annual aggregate service and interest costs for PBOP if the health care cost trend rate was changed while leaving all other assumptions constant:
Edison International SCEEdison International SCE
(in millions)Increase in health care cost trend rate by 1% Decrease in health care cost trend rate by 1% Increase in health care cost trend rate by 1% Decrease in health care cost trend rate by 1%Increase in health care cost trend rate by 1% Decrease in health care cost trend rate by 1% Increase in health care cost trend rate by 1% Decrease in health care cost trend rate by 1%
Change to accumulated benefit obligation for PBOP$244
 $(200) $243
 $(199)$247
 $(203) $246
 $(202)
Change to annual aggregate service and interest costs11
 (9) 11
 (9)9
 (8) 9
 (8)
Accounting for Contingencies
Nature of Estimates Required.    Edison International and SCE record loss contingencies when management determines that the outcome of future events is probable of occurring and when the amount of the loss can be reasonably estimated. Gain contingencies are recognized in the financial statements when they are realized.
Key Assumptions and Approach Used.    The determination of a reserve for a loss contingency is based on management judgment and estimates with respect to the likely outcome of the matter, including the analysis of different scenarios.

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Liabilities are recorded or adjusted when events or circumstances cause these judgments or estimates to change. In assessing whether a loss is a reasonable possibility, Edison International and SCE may consider the following factors, among others: the nature of the litigation, claim or assessment, available information, opinions or views of legal counsel and other advisors, and the experience gained from similar cases. Edison International and SCE provide disclosures for material contingencies when there is a reasonable possibility that a loss or an additional loss may be incurred.
Effect if Different Assumptions Used.    Actual amounts realized upon settlement of contingencies may be different than amounts recorded and disclosed and could have a significant impact on the liabilities, revenue and expenses recorded on the consolidated financial statements. For a discussion of contingencies, guarantees and indemnities, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies."

Application to Southern California Wildfires
29As discussed in "Management Overview," in December 2017, several wind-driven wildfires (the "December 2017 Wildfires") impacted portions of SCE's service territory and caused substantial damage to both residential and business properties and service outages for SCE customers. The causes of the December 2017 Wildfires are being investigated by Cal Fire and other fire agencies. SCE believes the investigations include the possible role of SCE's facilities.

Any potential liability of SCE for December 2017 Wildfire-related damages will depend on a number of factors, including whether SCE is determined to have substantially caused, or contributed to, the damages and whether parties seeking recovery of damages will be required to show negligence in addition to causation.
Management judgment was required to assess whether a loss contingency was probable and reasonably estimable. Given the preliminary stages of the investigations and the uncertainty as to the causes of the December 2017 Wildfires, and the extent and magnitude of potential damages, Edison International and SCE determined that it is possible, but not probable a loss had occurred as of December 31, 2017. Over the course of the various investigations, new facts may emerge as to the cause of the December 2017 Wildfires and the extent and magnitude of potential damages. If new facts are learned that cause management to conclude a loss is probable and reasonably estimable, Edison International and SCE would record an accrued liability at that time.



NEW ACCOUNTING GUIDANCE
New accounting guidance is discussed in "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies—New Accounting Guidance."
RISK FACTORS
RISKS RELATING TO EDISON INTERNATIONAL
Edison International's liquidity and ability to pay dividends depends on SCE's ability to pay dividends and tax allocation payments to Edison International, monetization of tax benefits retained by EME, ability to borrow funds, and access to capital markets.
Edison International is a holding company and, as such, it has no operations of its own. Edison International's ability to meet its financial obligations, make investments, and to pay dividends on its common stock is primarily dependent on the earnings and cash flows of SCE and its ability to make upstream distributions. Prior to paying dividends to Edison International, SCE has financial and regulatory obligations that must be satisfied, including, among others, debt service and preferred and preference stock dividends. In addition, CPUC holding company rules require that SCE's dividend policy be established by SCE's Board of Directors on the same basis as if SCE were a stand-alone utility company, and that the capital requirements of SCE, as deemed to be necessary to meet SCE's electricity service obligations, shall receive first priority from the Boards of Directors of both Edison International and SCE. Further, SCE and Edison International cannot pay dividends if California law requirements for the declaration of dividends are not met. For information on the California law requirements on the declaration of dividends, see "Liquidity and Capital Resources—SCE—SCE Dividends." SCE may also owe tax-allocation payments to Edison International under applicable tax-allocation agreements. Access to capital markets may be impacted by economic conditions that have an adverse effect on Edison International's liquidity. See "Risks Relating to Southern California Edison Company" below for further discussion.
The Edison International consolidated tax group retains significant net operating loss and tax credit carryforwards.  Realization of such tax benefits may be delayed or permanently reduced by future tax legislation that extends bonus depreciation or reduces the current corporate tax rate.
Edison International's business activities are concentrated in one industry and in one region.
Edison International business activities are concentrated in the electricity industry. Its principal subsidiary, SCE, serves customers only in southern and central California. Although Edison International, through Edison Energy Group, is developing competitive businesses that are diversified geographically, these businesses are not material. As a result, Edison

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International's future performance may be affected by events and economic factors unique to California or by regional regulation or legislation.
Edison International is developing businesses held by Edison Energy Group that may not be successful.
Edison International, through Edison Energy Group, is developing businessespursuing an energy services and managed portfolio solutions business focused on large C&I customers by providing unbiased expertise to capitalize on changes in the electricity industry. Edison International intendshelp define energy requirements and implement solutions to invest in companies to develop the capabilities of the Edison Energy Group entities but there can bebetter manage energy costs and risks. There is no assurance that these entitiesactivities will lead to growth or be profitable. 
Edison International is also exploring the sale of SoCore Energy, its solar business. There is no assurance that this will lead to a sale of the business, that a loss on sale will not result or that if a sale is not completed, that future solar activities will be profitable.
RISKS RELATING TO SOUTHERN CALIFORNIA EDISON COMPANY
Regulatory Risks
SCE is subject to extensive regulation and the risk of adverse regulatory decisions and changes in applicable regulations or legislation.
SCE operates in a highly regulated environment. SCE's business is subject to extensive federal, state and local energy, environmental and other laws and regulations. Among other things, the CPUC regulates SCE's retail rates and capital structure, and the FERC regulates SCE's wholesale rates. The NRC regulates the decommissioning of San Onofre. The construction, planning, and siting of SCE's power plants and transmission lines in California are also subject to regulation by the CPUC and other local, state and federal agencies.
SCE must periodically apply for licenses and permits from these various regulatory authorities and abide by their respective orders. Should SCE be unsuccessful in obtaining necessary licenses or permits or should these regulatory authorities initiate any investigations or enforcement actions or impose penalties or disallowances on SCE, SCE's business could be materially affected. The process of obtaining licenses and permits from regulatory authorities may be delayed or defeated by opponents and such delay or defeat could have a material effect on SCE's business.

30




In September 2016, the California Governor signed into law several CPUC reform bills that establish rules governing, among other subjects, communications between the CPUC officials, staff and the regulated utilities. Changes to the rules and processes around ex parte communications could result in delayed decisions, increased investigations, enforcement actions and penalties. In addition, the CPUC or other parties may initiate investigations of past communications between public utilities, including SCE, and CPUC officials and staff that could result in reopening completed proceedings for reconsideration.
In addition, existing regulations may be revised or reinterpreted and new laws and regulations may be adopted or become applicable to SCE, or its facilities or operations, in a manner that may have a detrimental effect on SCE's business or result in significant additional costs. In addition, regulations adopted via the public initiative or legislative process may apply to SCE, or its facilities or operations, in a manner that may have a detrimental effect on SCE's business or result in significant additional costs.
SCE's financial results depend upon its ability to recover its costs and to earn a reasonable rate of return on capital investments in a timely manner from its customers through regulated rates.
SCE's ongoing financial results depend on its ability to recover its costs from its customers, including the costs of electricity purchased for its customers, through the rates it charges its customers as approved by the CPUC and FERC. SCE's financial results also depend on its ability to earn a reasonable return on capital, including long-term debt and equity. SCE's ability to recover its costs and earn a reasonable rate of return can be affected by many factors, including the time lag between when costs are incurred and when those costs are recovered in customers' rates and differences between the forecast or authorized costs embedded in rates (which are set on a prospective basis) and the amount of actual costs incurred. The CPUC or the FERC may not allow SCE to recover costs on the basis that such costs were not reasonably or prudently incurred or for other reasons. Further, SCE may be required to incur expenses before the relevant regulatory agency approves the recovery of such costs. For example, to the recovery of the Tehachapi transmission project costs are subjectextent SCE is required to FERC approval and the public need for the project is reviewed by the CPUC. SCE filed a petition for modification with the CPUC in January 2017 to update the cost estimate for all elements of segments 4-11 to $2.7 billion (2016 dollars) from $2.0 billion (2016 dollars) of CPUC-approved cost findings. For further information, see "Liquidity and Capital Resources—SCE—Capital Investment Plan—Tehachapi" in the MD&A.
Changes in laws and regulations or changes in the political and regulatory environment also may have an adverse effect on the SCE's ability to timely recover its costs and earn its authorized rate of return. In addition,pay uninsured wildfire-related damages, SCE may be requiredforced to incurdo so before it is clear that such costs will be recoverable from customers. In addition, while SCE supports California’s environmental goals, it may be prevented from fully executing on its strategy to comply with new state lawssupport such goals by regulatory delay or to implement new state policies before SCE is assuredlack of cost recovery.
approval of cost-recovery for the costs of such strategic actions from the relevant regulatory agencies. In addition, SCE's capital investment plan, increasing procurement of renewable power and energy storage, increasing environmental regulations, leveling demand, and the cumulative impact of other public policy requirements, collectively place continuing upward pressure on customer rates. If SCE is unable to obtain a sufficient rate increase or modify its rate design to recover its costs (including an adequate return on capital) in rates in a timely manner, its financial condition and results of operations could be materially affected. For further information on SCE's rate requests, see "Management Overview—Regulatory Proceedings—2018 General Rate Case" and "—"Liquidity and Capital Resources—SCE—Regulatory Proceedings—FERC Formula Rates"Rate" in the MD&A.
SCE is subject to extensive regulation and the risk of adverse regulatory decisions and changes in applicable regulations or legislation.
SCE operates in a highly regulated environment. SCE's business is subject to extensive federal, state and local energy, environmental and other laws and regulations. Among other things, the CPUC regulates SCE's retail rates and capital structure, and the FERC regulates SCE's wholesale rates. The NRC regulates the decommissioning of San Onofre in addition to the local and state agencies that require permits. The construction, planning, and siting of SCE's power plants and transmission lines in California are also subject to regulation by the CPUC and other local, state and federal agencies.
SCE must periodically apply for licenses and permits from these various regulatory authorities and abide by their respective orders. Should SCE be unsuccessful in obtaining necessary licenses or permits or should these regulatory authorities initiate any investigations or enforcement actions or impose penalties or disallowances on SCE, SCE may be prevented from executing its strategy and its business could be materially affected. The process of obtaining licenses and permits from regulatory authorities may be delayed or defeated by opponents and such delay or defeat could have a material effect on SCE's business.
Rules, restrictions and processes around ex parte communications could result in delayed decisions, increased investigations, enforcement actions and penalties. In addition, the CPUC or other parties may initiate investigations of past communications between public utilities, including SCE, and CPUC officials and staff that could result in reopening completed proceedings for reconsideration.
In addition, existing regulations may be revised or reinterpreted and new laws and regulations may be adopted or become applicable to SCE, or its facilities or operations, in a manner that may have a detrimental effect on SCE's business or result in

35




significant additional costs. In addition, regulations adopted via the public initiative or legislative process may apply to SCE, or its facilities or operations, in a manner that may have a detrimental effect on SCE's business or result in significant additional costs.
SCE's energy procurement activities are subject to regulatory and market risks that could materially affect its financial condition and liquidity.
SCE obtains energy, capacity, environmental credits and ancillary services needed to serve its customers from its own generating plants and through contracts with energy producers and sellers. California law and CPUC decisions allow SCE to recover, through the rates it is allowed to charge its customers, reasonable procurement costs incurred in compliance with an approved procurement plan. Nonetheless, SCE's cash flows remain subject to volatility primarily resulting from changes in commodity prices. For instance, natural gas prices have increased due to the closure of the SoCalGas underground gas storage facility in Aliso Canyon, California. Additionally, significant and prolonged gas use restrictions may adversely impact the reliability of the electric grid if critical generation resources are limited in their operations. For further information, see "Business—SCE—Purchased Power and Fuel Supply." SCE is also subject to the risks of unfavorable or untimely CPUC decisions about the compliance with SCE's procurement plan and the reasonableness of certain procurement-related costs.
SCE may not be able to hedge its risk for commodities on economic terms or fully recover the costs of hedges through the rates it is allowed to charge its customers, which could materially affect SCE's liquidity and results of operations, see "Market Risk Exposures" in the MD&A.

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Financing Risks
As a capital intensive company, SCE relies on access to the capital markets. If SCE were unable to access the capital markets or the cost of financing were to substantially increase, its liquidity and operations could be materially affected.
SCE regularly accesses the capital markets to finance its activities and is expected to do so by its regulators as part of its obligation to serve as a regulated utility. SCE's needs for capital for its ongoing infrastructure investment program are substantial. SCE's ability to obtain financing, as well as its ability to refinance debt and make scheduled payments of principal, interest and preferred stock dividends, are dependent on numerous factors, including SCE's levels of indebtedness, maintenance of acceptable credit ratings, financial performance, liquidity and cash flow, and other market conditions. SCE's inability to obtain additional capital from time to time could have a material effect on SCE's liquidity and operations.
Competitive and Market Risks
The electricity industry is undergoing change, including increased competition, technological advancements, and political and regulatory developments
California utilities are experiencing increasing deployment by customers and third parties of DERs, such as solar generation, energy storage, energy efficiency and demand response technologies. This growth will require modernization of the electric distribution grid to, among other things, accommodate two-way flows of electricity and increase the grid's capacity to interconnect DERs. To this end, the CPUC is conducting proceedings to: evaluate changes to the planning and operation of the electric distribution grid in order to prepare for higher penetration of DERs; consider future grid modernization and grid reinforcement investments; evaluate if traditional grid investments can be deferred by DERs, and if feasible, what, if any, compensation to utilities would be appropriate; and clarify the role of the electric distribution grid operator. The outcome of these proceedings is unknown. These changes could materially affect SCE's business model and its financial condition and results of operations. For more information, see "Management Overview—Capital Program—Distribution Grid Development" in the MD&A.
Customer-owned generation and community choice aggregators each reduce the amount of electricity customers purchase from utilities and have the effect of increasing utility rates unless customer rates are designed to allocate the costs of the distribution grid across all customers that benefit from its use. For example, customers in California that generate their own power do not currently pay all transmission and distribution charges and non-bypassable charges, subject to limitations, which result in increased utility rates for those customers who do not own their generation. Such increases influence the public discussion regarding changes in the electric utility business model.
In addition, the FERC has opened transmission development to competition from independent developers, allowing such developers to compete with incumbent utilities for the construction and operation of transmission facilities. For more information, see "Business—SCE—Competition."
Operating Risks
SCE's financial condition and results of operations could be materially affected if it is unable to successfully manage the risks inherent in operating and maintaining its facilities.
SCE's infrastructure is aging and could pose a risk to system reliability. In order to mitigate this risk,Damage claims against SCE is engaged in a significant and ongoing infrastructure investment program. This substantial investment program elevates operational risks and the need for superior execution in SCE's activities. SCE's financial condition and results of operations could be materially affected if it is unable to successfully manage these risks as well as the risks inherent in operating and maintaining its facilities, the operation of which can be hazardous. SCE's inherent operating risks include such matters as the risks of human performance, workforce capabilities, public opposition to infrastructure projects, delays, environmental mitigation costs, difficulty in estimating costs or in recovering costs that are above original estimates, system limitations and degradation, and interruptions in necessary supplies.

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Weather-related incidents and other natural disasters couldwildfire-related losses may materially affect SCE'sSCE’s financial condition and results of operations.
Weather-related incidentsProlonged drought conditions and shifting weather patterns in California resulting from climate change as well as increased tree mortality rates have increased the duration of the wildfire season and the risk of severe wildfire events. Severe wildfires and increased urban development in high fire risk areas in California have given rise to large damage claims against California utilities for fire-related losses alleged to be the result of utility practices and/or the failure of electric and other natural disasters, including storms, wildfires and earthquakes, can disruptutility equipment. Certain California courts have previously found utilities to be strictly liable for property damage, regardless of fault, by applying the generation and transmissiontheory of inverse condemnation when a utility's facilities were determined to be a substantial cause of a wildfire that caused the property damage. The rationale stated by these courts for applying this theory to investor-owned utilities is that property losses resulting from a public improvement, such as the distribution of electricity, can be spread across the larger community that benefited from such improvement. However, in December 2017, the CPUC issued a decision denying the investor-owned utility's request to include in its rates uninsured wildfire-related costs arising from several 2007 fires, finding that the investor-owned utility did not prudently manage and can seriously damageoperate its facilities prior to or at the infrastructure necessaryoutset of the 2007 wildfires. An inability to deliver power to SCE's customers. These events can lead to lost revenues and increased expenses, including higher maintenance and repair costs. They can also result in regulatory penalties and disallowances, particularly if SCE encounters difficulties in restoring power to its customers on a timely basis. These occurrencesrecover uninsured wildfire-related costs could materially affect SCE's business, financial condition and results of operations,operations. For example, if SCE is found liable for damages related to the December 2017 Wildfires, and SCE is unable to, or believes that it will be unable to, recover those damages, SCE may not have sufficient cash or equity to pay dividends to Edison International or may be prohibited from declaring such dividends because it does not meet California law requirements for the inability to restore power to SCE's customers could also materially damagedeclaration of dividends. For information on the business reputationCalifornia law requirements on the declaration of dividends, see "Liquidity and Capital Resources—SCE—SCE and Edison International.Dividends" in the MD&A. See "Management Overview—Southern California Wildfires" in the MD&A.
The generation, transmission and distribution of electricity are dangerous and involve inherent risks of damage to private property and injury to employees and the general public.
Electricity is dangerous for employees and the general public should they come in contact with electrical current or equipment, including through downed power lines or if equipment malfunctions. Injuries and property damage caused by such events can subject SCE to liability that, despite the existence ofSCE's insurance coverage canfor wildfires arising from its ordinary operations may not be significant.sufficient.
Edison International has experienced increased costs and difficulties in obtaining insurance coverage for wildfires that could arise from SCE's ordinary operations. Edison International, SCE or its contractors may experience coverage reductions and/or increased wildfire insurance costs in future years. No assurance can be given that future losses will not exceed the limits of SCE's or its contractors' insurance coverage. The CPUC has increased its focus on public safety with an emphasis on heightened compliance with constructionSCE may not be able to recover uninsured losses and operating standards andincreases in the potential for penalties being imposed on utilities. Additionally, the CPUC has delegated to its staff the authority to issue citations to electric utilities,cost of insurance in customer rates. Losses which can impose fines of up to $50,000 per violation per day, pursuant to the CPUC's jurisdiction for violations of safety rules foundare not fully insured or cannot be recovered in statutes, regulations, and the CPUC's General Orders. Such penalties and liabilitiescustomer rates could be significant and materially affect Edison International's and SCE's liquidityfinancial condition and results of operations. For more information on wildfire insurance risk, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—Southern California Wildfires."
There are inherent risks associated with owning and decommissioning nuclear power generating facilities and obtaining cost reimbursement, including, among other things, costs exceeding estimates, execution risks, potential harmful effects on the environment and human health and the dangerhazards of storage, handling and disposal of radioactive materials. Existing insurance and ratemaking arrangements may not protect SCE fully against losses from a nuclear incident.

36




SCE expects to fund decommissioning costs with assets that are currently held in nuclear decommissioning trusts. SCE believes that the nuclear decommissioning trusts' assets will be sufficient to pay the estimated costs of decommissioning without further contributions but the costs ultimately incurred could exceed the current estimates. The costs of decommissioning San Onofre are subject to reasonableness reviews by the CPUC. These costs may not be recoverable through regulatory processes or otherwise unless SCE can establish that the costs were reasonably incurred. In addition, SCE faces inherent execution risks including such matters as the risks of human performance, workforce capabilities, public opposition, permitting delays, and governmental approvals.
Despite the fact that San Onofre is being decommissioned, the presence of spent nuclear fuel still poses a potential risk of a nuclear incident. Federal law limits public liability claims from a nuclear incident to the amount of available financial protection, which is currently approximately $13.4 billion. SCE and other owners of San Onofre and Palo Verde have purchased the maximum private primary insurance available of $450 million per site. If nuclear incident liability claims were to exceed $450 million, the remaining amount would be made up from contributions of approximately $13.0 billion made by all of the nuclear facility owners in the U.S., up to an aggregate total of $13.4 billion. There is no assurance that the CPUC would allow SCE to recover the required contribution made in the case of one or more nuclear incident claims that exceeded $450 million. If this public liability limit of $13.4 billion is insufficient, federal law contemplates that additional funds may be appropriated by Congress. There can be no assurance of SCE's ability to recover uninsured costs in the event the additional federal appropriations are insufficient. For more information on nuclear insurance risk, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—Nuclear Insurance."
Climate change exacerbated weather-related incidents and other natural disasters could materially affect SCE's insurance coverage forfinancial condition and results of operations.
Weather-related incidents and other natural disasters, including storms, wildfires, arising from its ordinary operationsmudslides and earthquakes, can disrupt the generation and transmission of electricity, and can seriously damage the infrastructure necessary to deliver power to SCE's customers. Climate change has caused, and exacerbated, extreme weather events and wildfires in southern California. These events can lead to lost revenue and increased expense, including higher maintenance and repair costs, which SCE may not be sufficient.
Edison International has experienced increased costsable to recover from its customers. They can also result in regulatory penalties and disallowances, particularly if SCE encounters difficulties in obtainingrestoring power to its customers on a timely basis or if fire-related losses are found to be the result of utility practices and/or the failure of electric and other utility equipment. These occurrences could materially affect SCE's business, financial condition and results of operations, and the inability to restore power to SCE's customers could also materially damage the business reputation of SCE and Edison International.
The generation, transmission and distribution of electricity are dangerous and involve inherent risks of damage to private property and injury to employees and the general public.
Electricity is dangerous for employees and the general public should they come in contact with electrical current or equipment, including through downed power lines or if equipment malfunctions. Injuries and property damage caused by such events can subject SCE to liability that, despite the existence of insurance coverage, for wildfires that could arise from SCE's ordinary operations. Edison International, SCE or its contractors may experience coverage reductions and/or increased wildfire insurance costs in future years.can be significant. No assurance can be given that future losses will not exceed the limits of SCE's or its contractors' insurance coverage. Uninsured lossesThe CPUC has increased its focus on public safety with an emphasis on heightened compliance with construction and increasesoperating standards and the potential for penalties being imposed on utilities. Additionally, the CPUC has delegated to its staff the authority to issue citations to electric utilities, which can impose fines of up to $50,000 per violation per day, pursuant to the CPUC's jurisdiction for violations of safety rules found in statutes, regulations, and the CPUC's General Orders. Such penalties and liabilities could be significant and materially affect SCE's liquidity and results of operations.
SCE's financial condition and results of operations could be materially affected if it is unable to successfully manage the risks inherent in operating and maintaining its facilities.
SCE's infrastructure is aging and could pose a risk to system reliability. In order to mitigate this risk, SCE is engaged in a significant and ongoing infrastructure investment program. This substantial investment program elevates operational risks and the need for superior execution in SCE's activities. SCE's financial condition and results of operations could be materially affected if it is unable to successfully manage these risks as well as the risks inherent in operating and maintaining its facilities, the operation of which can be hazardous. SCE's inherent operating risks include such matters as the risks of human performance, workforce capabilities, public opposition to infrastructure projects, delays, environmental mitigation costs, difficulty in estimating costs or in recovering costs that are above original estimates, system limitations and degradation, and interruptions in necessary supplies.

37




Financing Risks
As a capital intensive company, SCE relies on access to the capital markets. If SCE were unable to access the capital markets or the cost of insurance may notfinancing were to substantially increase, its liquidity and operations could be recoverable in customer rates. A loss whichmaterially affected.
SCE regularly accesses the capital markets to finance its activities and is not fully insured or cannot be recovered in customer ratesexpected to do so by its regulators as part of its obligation to serve as a regulated utility. SCE's needs for capital for its ongoing infrastructure investment program are substantial. SCE's ability to obtain financing, as well as its ability to refinance debt and make scheduled payments of principal, interest and preferred stock dividends, are dependent on numerous factors, including SCE's levels of indebtedness, maintenance of acceptable credit ratings, financial performance, liquidity and cash flow, and other market conditions. In addition, the actions of other California investor-owned utilities and the CPUC can affect market conditions and therefore, SCE's ability to obtain financing. SCE's inability to obtain additional capital from time to time could have a material effect on SCE's liquidity and operations.
Competitive and Market Risks
SCE's inability to effectively and timely respond to the changes that the electricity industry is undergoing, as a result of increased competition, technological advances, and changes to the regulatory environment, could materially affect Edison International'simpact SCE’s business model, financial condition and results of operations.
California utilities are experiencing increasing deployment by customers and third parties of DERs, such as solar generation, energy storage, energy efficiency and demand response technologies. California’s environmental policy objectives are accelerating the pace and scope of industry change. This change will require modernization of the electric distribution grid to, among other things, accommodate two-way flows of electricity and increase the grid's capacity to interconnect DERs. In addition, enabling California’s clean energy economy goals will require sustained investments in grid modernization, renewable integration projects, energy efficiency programs, energy storage options and electric vehicle infrastructures. To this end, the CPUC is conducting proceedings to: evaluate changes to the planning and operation of the electric distribution grid in order to prepare for higher penetration of DERs; consider future grid modernization and grid reinforcement investments; evaluate if traditional grid investments can be deferred by DERs, and if feasible, what, if any, compensation to utilities would be appropriate; and clarify the role of the electric distribution grid operator. The outcome of the CPUC's proceedings may impact SCE's business model, its ability to execute on its strategy, and ultimately its financial condition and results of operations. For more information, on wildfire insurance risk, see "Notes"Management Overview—Capital Program—Distribution Grid Development" in the MD&A.
Customer-owned generation and CCAs each reduce the amount of electricity that customers purchase from utilities and have the effect of increasing utility rates unless customer rates are designed to Consolidated Financial Statements—Note 11. Commitmentsallocate the costs of the distribution grid across all customers that benefit from its use. For example, customers in California who generate their own power do not currently pay all transmission and Contingencies—Contingencies—Wildfire Insurance.distribution charges and non-bypassable charges, subject to limitations, which result in increased utility rates for those customers who do not own their generation. If regulations aren't changed such that customers pay their share of transmission and distribution charges and non-bypassable charges or the demand for electricity reduces so significantly that SCE is no longer effectively able to recover such charges from its customers, SCE's business, financial condition and results of operations will be materially impacted.
In addition, the FERC has opened transmission development to competition from independent developers, allowing such developers to compete with incumbent utilities for the construction and operation of transmission facilities. For more information, see "Business—SCE—Competition."

33




Cybersecurity and Physical Security Risks
SCE's systems and network infrastructure may be vulnerable to physical and cyber attacks, intrusions or other catastrophic events that could result in their failure or reduced functionality.
Regulators, such as the NERC, and U.S. Government Departments, including the Departments of Defense, Homeland Security and Energy, have noted that threat sources continue to seek to exploit potential vulnerabilities in the U.S. national electric grid and other energy infrastructures and that such attacks and disruptions, both physical and cyber, are becoming increasingly sophisticated and dynamic. As SCE moves from an analog to a digital electric grid, new cyber security risks may arise. An example of such new risks is the installation of "smart" meters in SCE's service territory. This technology may represent a new route for attacks on SCE's information systems. Additional risks may also arise as a result of proposed grid modernization efforts. SCE's operations require the continuous availability of critical information technology systems and network infrastructure. SCE's systems have been, and will likely continue to be, subjected to computer attacks of malicious codes, unauthorized access attempts, and other illicit activities, but to date, SCE has not experienced a material cyber security cybersecurity

38




breach. Although SCE actively monitors developments in this area and is involved in various industry groups and government initiatives, no security measures can completely shield such systems and infrastructure from vulnerabilities to cyber attacks, intrusions or other catastrophic events that could result in their failure or reduced functionality. If SCE's information technology systemsand operational technology systems' security measures were to be breached or a critical system failure were to occur without timely recovery, SCE could be unable to fulfill critical business functions such as delivery of electricity to customers and/or sensitive confidential personal and other data could be compromised, which could result in violations of applicable privacy and other laws, financial loss to SCE or to its customers, loss of confidence in SCE's security measures, customer dissatisfaction, and significant litigation exposure, all of which could materially affect SCE's financial condition and results of operations and materially damage the business reputation of Edison International and SCE.
Environmental Risks
SCE is subject to extensive environmental regulations that may involve significant and increasing costs and materially affect SCE.
SCE is subject to extensive environmental regulations and permitting requirements that involve significant and increasing costs and substantial uncertainty. SCE devotes significant resources to environmental monitoring, pollution control equipment, mitigation projects, and emission allowances to comply with existing and anticipated environmental regulatory requirements. Environmental regulations and permitting requirements also affect the cost and timing of transmission and distribution projects. At the state level, the current trend is toward more stringent standards, stricter regulation, higher reductions of GHG emissions, and more expansive application of environmental regulations. The adoption of laws and regulations to implement greenhouse gas controls could materially affect operations of power plants, which could in turn impact electricity markets and SCE's customer rates. SCE may also be exposed to risks arising from past, current or future contamination at its former or existing facilities or with respect to offsite waste disposal sites that have been used in its operations. Current and future California laws and regulations also increase the required amount of energy that must be procured from renewable resources. See "Business—Environmental Regulation of Edison International and Subsidiaries" for further discussion of environmental regulations under which SCE operates.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Information responding to this section is included in the MD&A under the heading "Market Risk Exposures."
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA


3439




Report of Independent Registered Public Accounting Firm


To the Board of Directors and
Shareholders of Edison International

Opinions on the Financial Statements and Internal Control over Financial Reporting
In our opinion,We have audited the accompanying consolidated balance sheets of Edison International and its subsidiaries as of December 31, 2017 and December 31, 2016, and the related consolidated statements of income, comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2017, including the related notes and financial statement schedules listed in the index appearing under Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of December 31, 2017, 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 consolidated financial statements referred to above present fairly, in all material respects, the financial position of Edison International and its subsidiaries atthe Company as of December 31, 20162017 and 2015,2016, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 20162017 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedules listed in the index appearing under Item 15(a)(2)present fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016,2017, based on criteria established in Internal Control Control—Integrated Framework Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). COSO.
Basis for Opinions
The Company's management is responsible for these consolidated financial statements, and financial statement schedules, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Report on Internal Control overOver Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on thesethe Company’s consolidated financial statements on the financial statement schedules, and on the Company's internal control over financial reporting based on our integrated 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 Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated 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 supportingregarding the amounts and disclosures in the consolidated financial statements, assessingstatements. Our audits also included evaluating the accounting principles used and significant estimates made by management, andas well as evaluating the overall presentation of the consolidated financial statement presentation.statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

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'scompany’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) 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 (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company'scompany’s assets that could have a material effect on the financial statements.

40




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/ PricewaterhouseCoopers LLP

Los Angeles, California
February 21, 201722, 2018

We have served as the Company's auditor since 2002.





3541




Report of Independent Registered Public Accounting Firm


To the Board of Directors and
Shareholders of Southern California Edison Company

In our opinion,Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Southern California Edison and its subsidiaries as of December 31, 2017 and 2016, and the related consolidated statements of income, comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2017, including the related notes and financial statement schedule listed in the index appearing under Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of Southern California Edisonthe Company and its subsidiaries as of December 31, 20162017 and 2015,2016, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 20162017 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the index appearing under Item 15(a)(2) presents fairly, in all material respects, the information set forth therein when read in conjunction with the related
Basis for Opinion
These consolidated financial statements. These financial statements and financial statement schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on thesethe Company's consolidated financial statements and financial statement schedule 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 of these consolidated financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement. Anmisstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit includesof 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 consolidated 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 supportingregarding the amounts and disclosures in the consolidated financial statements, assessingstatements. Our audits also included evaluating the accounting principles used and significant estimates made by management, andas well as evaluating the overall presentation of the consolidated financial statement presentation.statements. We believe that our audits provide a reasonable basis for our opinion.




/s/ PricewaterhouseCoopers LLP

Los Angeles, California
February 21, 201722, 2018























We have served as the Company's auditor since 2002.








3642





















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3743




CONSOLIDATED STATMENTS
Consolidated Statements of IncomeEdison International 


  
 Years ended December 31,
(in millions, except per-share amounts)2017 2016 2015
Total operating revenue$12,320
 $11,869
 $11,524
Purchased power and fuel4,873
 4,527
 4,266
Operation and maintenance2,807
 2,868
 2,990
Depreciation and amortization2,041
 2,007
 1,919
Property and other taxes377
 354
 336
Impairment and other charges738
 21
 5
Other operating income(9) 
 
Total operating expenses10,827
 9,777
 9,516
Operating income1,493
 2,092
 2,008
Interest and other income146
 123
 174
Interest expense(639) (581) (555)
Other expenses(51) (44) (59)
Income from continuing operations before income taxes949
 1,590
 1,568
Income tax expense281
 177
 486
Income from continuing operations668
 1,413
 1,082
Income from discontinued operations, net of tax
 12
 35
Net income668
 1,425
 1,117
Preferred and preference stock dividend requirements of utility124
 123
 113
Other noncontrolling interests(21) (9) (16)
Net income attributable to Edison International common shareholders$565
 $1,311
 $1,020
Amounts attributable to Edison International common shareholders:     
Income from continuing operations, net of tax$565
 $1,299
 $985
Income from discontinued operations, net of tax
 12
 35
Net income attributable to Edison International common shareholders$565
 $1,311
 $1,020
Basic earnings per common share attributable to Edison International common shareholders:     
Weighted-average shares of common stock outstanding326
 326
 326
Continuing operations$1.73
 $3.99
 $3.02
Discontinued operations
 0.03
 0.11
Total$1.73
 $4.02
 $3.13
Diluted earnings per common share attributable to Edison International common shareholders:     
Weighted-average shares of common stock outstanding, including effect of dilutive securities328
 330
 329
Continuing operations$1.72
 $3.94
 $2.99
Discontinued operations
 0.03
 0.11
Total$1.72
 $3.97
 $3.10
Dividends declared per common share$2.2325
 $1.9825
 $1.7325

44




Consolidated Statements of IncomeEdison International 


  
 Years ended December 31,
(in millions, except per-share amounts)2016 2015 2014
Total operating revenue$11,869
 $11,524
 $13,413
Purchased power and fuel4,527
 4,266
 5,593
Operation and maintenance2,868
 2,990
 3,149
Depreciation, decommissioning and amortization2,007
 1,919
 1,720
Property and other taxes354
 336
 322
Impairment and other charges21
 5
 157
Total operating expenses9,777
 9,516
 10,941
Operating income2,092
 2,008
 2,472
Interest and other income123
 174
 147
Interest expense(581) (555) (560)
Other expenses(44) (59) (80)
Income from continuing operations before income taxes1,590
 1,568
 1,979
Income tax expense177
 486
 443
Income from continuing operations1,413
 1,082
 1,536
Income from discontinued operations, net of tax12
 35
 185
Net income1,425
 1,117
 1,721
Preferred and preference stock dividend requirements of utility123
 113
 112
Other noncontrolling interests(9) (16) (3)
Net income attributable to Edison International common shareholders$1,311
 $1,020
 $1,612
Amounts attributable to Edison International common shareholders:     
Income from continuing operations, net of tax$1,299
 $985
 $1,427
Income from discontinued operations, net of tax12
 35
 185
Net income attributable to Edison International common shareholders$1,311
 $1,020
 $1,612
Basic earnings per common share attributable to Edison International common shareholders:     
Weighted-average shares of common stock outstanding326
 326
 326
Continuing operations$3.99
 $3.02
 $4.38
Discontinued operations0.03
 0.11
 0.57
Total$4.02
 $3.13
 $4.95
Diluted earnings per common share attributable to Edison International common shareholders:     
Weighted-average shares of common stock outstanding, including effect of dilutive securities330
 329
 329
Continuing operations$3.94
 $2.99
 $4.33
Discontinued operations0.03
 0.11
 0.56
Total$3.97
 $3.10
 $4.89
Dividends declared per common share$1.9825
 $1.7325
 $1.4825


Consolidated Statements of Comprehensive Income Edison International  Edison International 
        
 Years ended December 31, Years ended December 31,
(in millions) 2016 2015 2014 2017 2016 2015
Net income $1,425
 $1,117
 $1,721
 $668
 $1,425
 $1,117
Other comprehensive income (loss), net of tax:      
Other comprehensive income, net of tax:      
Pension and postretirement benefits other than pensions:            
Net gain (loss) arising during the period plus amortization included in net income 2
 1
 (47)
Net gain or loss arising during the period plus amortization included in net income 10
 2
 1
Prior service cost arising during the period plus amortization included in net income 
 1
 
 
 
 1
Other 1
 
 2
 
 1
 
Other comprehensive income (loss), net of tax 3
 2
 (45)
Other comprehensive income, net of tax 10
 3
 2
Comprehensive income 1,428
 1,119
 1,676
 678
 1,428
 1,119
Less: Comprehensive income attributable to noncontrolling interests 114
 97
 109
 103
 114
 97
Comprehensive income attributable to Edison International $1,314
 $1,022
 $1,567
 $575
 $1,314
 $1,022





Consolidated Balance Sheets Edison International  Edison International 
        
 December 31, December 31,
(in millions) 2016 2015 2017 2016
ASSETS        
Cash and cash equivalents $96
 $161
 $1,091
 $96
Receivables, less allowances of $62 for uncollectible accounts at both dates 714
 771
Receivables, less allowances of $54 million and $62 for uncollectible accounts at respective dates 717
 714
Accrued unbilled revenue 370
 565
 212
 370
Inventory 239
 267
 242
 239
Income tax receivables 224
 1
Prepaid expenses 233
 103
Derivative assets 73
 79
 105
 73
Regulatory assets 350
 560
 703
 350
Other current assets 281
 251
 202
 177
Total current assets 2,123
 2,654
 3,729
 2,123
Nuclear decommissioning trusts 4,242
 4,331
 4,440
 4,242
Other investments 83
 203
 73
 83
Total investments 4,325
 4,534
 4,513
 4,325
Utility property, plant and equipment, less accumulated depreciation and amortization of $9,000 and $8,548 at respective dates 36,806
 34,945
Nonutility property, plant and equipment, less accumulated depreciation of $99 and $85 at respective dates 194
 140
Utility property, plant and equipment, less accumulated depreciation and amortization of $9,355 and $9,000 at respective dates 38,708
 36,806
Nonutility property, plant and equipment, less accumulated depreciation of $114 and $99 at respective dates 342
 194
Total property, plant and equipment 37,000
 35,085
 39,050
 37,000
Derivative assets 1
 84
Regulatory assets 7,455
 7,512
 4,914
 7,455
Other long-term assets 415
 360
 374
 416
Total long-term assets 7,871
 7,956
 5,288
 7,871
        
        
        
        
        
        
        
        
    
Total assets $51,319
 $50,229
 $52,580
 $51,319



Consolidated Balance Sheets Edison International  Edison International 
        
 December 31, December 31,
(in millions, except share amounts) 2016 2015 2017 2016
LIABILITIES AND EQUITY        
Short-term debt $1,307
 $695
 $2,393
 $1,307
Current portion of long-term debt 981
 295
 481
 981
Accounts payable 1,342
 1,310
 1,503
 1,342
Accrued taxes 50
 72
 23
 50
Customer deposits 269
 242
 281
 269
Derivative liabilities 216
 218
 1
 216
Regulatory liabilities 756
 1,128
 1,121
 756
Other current liabilities 991
 967
 1,265
 991
Total current liabilities 5,912
 4,927
 7,068
 5,912
Long-term debt 10,175
 10,883
 11,642
 10,175
Deferred income taxes and credits 8,327
 7,480
 4,567
 8,327
Derivative liabilities 941
 1,100
 
 941
Pensions and benefits 1,354
 1,759
 943
 1,354
Asset retirement obligations 2,590
 2,764
 2,908
 2,590
Regulatory liabilities 5,726
 5,676
 8,614
 5,726
Other deferred credits and other long-term liabilities 2,102
 2,246
 2,953
 2,102
Total deferred credits and other liabilities 21,040
 21,025
 19,985
 21,040
Total liabilities 37,127
 36,835
 38,695
 37,127
Commitments and contingencies (Note 11) 
 
 
 
Redeemable noncontrolling interest 5
 6
 19
 5
Common stock, no par value (800,000,000 shares authorized; 325,811,206 shares issued and outstanding at respective dates) 2,505
 2,484
 2,526
 2,505
Accumulated other comprehensive loss (53) (56) (43) (53)
Retained earnings 9,544
 8,940
 9,188
 9,544
Total Edison International's common shareholders' equity 11,996
 11,368
 11,671
 11,996
Noncontrolling interests preferred and preference stock of utility
 2,191
 2,020
 2,193
 2,191
Other noncontrolling interests 2
 
Total equity 14,187
 13,388
 13,866
 14,187
        
        
Total liabilities and equity $51,319
 $50,229
 $52,580
 $51,319



Consolidated Statements of Cash Flows Edison International  Edison International 
    
 Years ended December 31, Years ended December 31,
(in millions) 2016 2015 2014 2017 2016 2015
Cash flows from operating activities:            
Net income $1,425
 $1,117
 $1,721
 $668
 $1,425
 $1,117
Less: Income from discontinued operations 12
 35
 185
 
 12
 35
Income from continuing operations 1,413
 1,082
 1,536
 668
 1,413
 1,082
Adjustments to reconcile to net cash provided by operating activities:            
Depreciation, decommissioning and amortization 2,098
 2,005
 1,815
Depreciation and amortization 2,115
 2,098
 2,005
Allowance for equity during construction (74) (87) (65) (87) (74) (87)
Impairment and other charges 
 5
 157
 738
 
 5
Deferred income taxes and investment tax credits 190
 449
 522
 498
 190
 449
Other 20
 (28) 20
 22
 20
 (28)
Nuclear decommissioning trusts (179) (428) 39
 (197) (179) (428)
EME settlement payments, net of insurance proceeds (209) (176) (225) 
 (209) (176)
Changes in operating assets and liabilities:            
Receivables 52
 49
 64
 7
 52
 49
Inventory 8
 14
 (25) (12) 8
 14
Accounts payable 35
 8
 14
 50
 35
 8
Prepaid and accrued taxes (6) (28) (100)
Tax receivables and payables (250) (6) (28)
Other current assets and liabilities 211
 (24) (103) 34
 211
 (24)
Derivative assets and liabilities, net 13
 45
 (40) (28) 13
 45
Regulatory assets and liabilities, net (292) 1,729
 (358) 4
 (292) 1,729
Other noncurrent assets and liabilities (24) (106) (3) 25
 (24) (106)
Net cash provided by operating activities 3,256
 4,509
 3,248
 3,587
 3,256
 4,509
Cash flows from financing activities:            
Long-term debt issued or remarketed, net of discount and issuance costs of $7, $17, and $6 at respective periods 397
 1,420
 494
Long-term debt issued or remarketed, net of premium, discount and issuance costs of $2, $7, and $17 for respective years 2,233
 397
 1,420
Long-term debt matured or repurchased (220) (762) (607) (1,285) (220) (762)
Preference stock issued, net 294
 319
 269
 462
 294
 319
Preference stock redeemed (125) (325) 
 (475) (125) (325)
Short-term debt financing, net 611
 (572) 1,079
 1,084
 611
 (572)
Dividends to noncontrolling interests (123) (116) (111)
Payments for stock-based compensation (393) (237) (197)
Receipts from stock option exercises 215
 135
 128
Dividends and distribution to noncontrolling interests (125) (123) (116)
Dividends paid (626) (544) (463) (707) (626) (544)
Other (113) (8) (16) (2) (11) 61
Net cash provided by (used in) financing activities 95
 (588) 645
 1,007
 95
 (588)
Cash flows from investing activities:            
Capital expenditures (3,734) (4,225) (3,906) (3,828) (3,734) (4,225)
Proceeds from sale of nuclear decommissioning trust investments 3,212
 3,506
 2,617
 5,239
 3,212
 3,506
Purchases of nuclear decommissioning trust investments (3,033) (3,132) (2,661) (5,042) (3,033) (3,132)
Life insurance policy loans proceeds 140
 
 
 26
 140
 
Other (1) (41) 43
 6
 (1) (41)
Net cash used in investing activities (3,416) (3,892) (3,907) (3,599) (3,416) (3,892)
Net (decrease) increase in cash and cash equivalents (65) 29
 (14)
Net increase (decrease) in cash and cash equivalents 995
 (65) 29
Cash and cash equivalents at beginning of year 161
 132
 146
 96
 161
 132
Cash and cash equivalents at end of year $96
 $161
 $132
 $1,091
 $96
 $161


Consolidated Statements of Changes in EquityConsolidated Statements of Changes in Equity     Edison International Consolidated Statements of Changes in Equity       Edison International 
            
Equity Attributable to Common Shareholders Noncontrolling Interests  Equity Attributable to Common Shareholders Noncontrolling Interests  
(in millions)Common
Stock
 Accumulated
Other
Comprehensive
Loss
 Retained
Earnings
 Subtotal Preferred
and
Preference
Stock
 Total
Equity
Common
Stock
 Accumulated
Other
Comprehensive
Loss
 Retained
Earnings
 Subtotal Other Preferred
and
Preference
Stock
 Total
Equity
Balance at December 31, 2013$2,403
 $(13) $7,548
 $9,938
 $1,753
 $11,691
Balance at December 31, 2014$2,445
 $(58) $8,573
 $10,960
 $
 $2,022
 $12,982
Net income
 
 1,612
 1,612
 112
 1,724

 
 1,020
 1,020
 
 113
 1,133
Other comprehensive loss
 (45) 
 (45) 
 (45)
 2
 
 2
 
 
 2
Common stock dividends declared ($1.4825 per share)
 
 (483) (483) 
 (483)
Dividends and distributions to noncontrolling interests and other
 
 
 
 (112) (112)
Stock-based compensation and other15
 
 (104) (89) 
 (89)
Noncash stock-based compensation and other27
 
 
 27
 
 27
Issuance of preference stock
 
 
 
 269
 269
Balance at December 31, 2014$2,445
 $(58) $8,573
 $10,960
 $2,022
 $12,982
Net income
 
 1,020
 1,020
 113
 1,133
Other comprehensive income
 2
 
 2
 
 2
Common stock dividends declared ($1.7325 per share)
 
 (564) (564) 
 (564)
 
 (564) (564) 
 
 (564)
Dividends and distributions to noncontrolling interests and other
 
 
 
 (113) (113)
 
 
 
 
 (113) (113)
Stock-based compensation and other15
 
 (85) (70) 
 (70)15
 
 (85) (70) 
 
 (70)
Noncash stock-based compensation and other24
 
 
 24
 
 24
24
 
 
 24
 
 
 24
Issuance of preference stock
 
 
 
 319
 319

 
 
 
 
 319
 319
Redemption of preference stock
 
 (4) (4) (321) (325)
 
 (4) (4) 
 (321) (325)
Balance at December 31, 2015$2,484
 $(56) $8,940
 $11,368
  $2,020
 $13,388
$2,484
 $(56) $8,940
 $11,368
 $
 $2,020
 $13,388
Net income
 
 1,311
 1,311
  123
 1,434

 
 1,311
 1,311
 
 123
 1,434
Other comprehensive income
 3
 
 3
 
 3

 3
 
 3
 
 
 3
Common stock dividends declared ($1.9825 per share)
 
 (646) (646) 
 (646)
 
 (646) (646) 
 
 (646)
Dividends and distributions to noncontrolling interests and other
 
 
 
 (123) (123)
 
 
 
 
 (123) (123)
Stock-based compensation and other(1) 
 (59) (60) 
 (60)(1) 
 (59) (60) 
 
 (60)
Noncash stock-based compensation and other22
 
 
 22
 
 22
22
 
 
 22
 
 
 22
Issuance of preference stock
 
 
 
 294
 294

 
 
 
 
 294
 294
Redemption of preference stock
 
 (2) (2)  (123) (125)
 
 (2) (2) 
 (123) (125)
Balance at December 31, 2016$2,505
 $(53) $9,544
 $11,996
 $2,191
 $14,187
$2,505
 $(53) $9,544
 $11,996
 $
 $2,191
 $14,187
Net income
 
 565
 565
 (18) 124
 671
Other comprehensive income
 10
 
 10
 
 
 10
Contribution from tax equity investor







20
 

20
Common stock dividends declared ($2.2325 per share)
 
 (727) (727) 
 
 (727)
Dividends and distributions to noncontrolling interests and other
 
 
 
 
 (124) (124)
Stock-based compensation and other
 
 (179) (179) 
 
 (179)
Noncash stock-based compensation and other21
 
 
 21
 
 
 21
Issuance of preference stock
 
 
 
 
 462
 462
Redemption of preference stock
 
 (15) (15) 
 (460) (475)
Balance at December 31, 2017$2,526
 $(43) $9,188
 $11,671
 $2
 $2,193
 $13,866



















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4450




Consolidated Statements of IncomeSouthern California Edison Company

 Years ended December 31, Years ended December 31,
(in millions) 2016 2015 2014 2017 2016 2015
Operating revenue $11,830
 $11,485
 $13,380
 $12,254
 $11,830
 $11,485
Purchased power and fuel 4,527
 4,266
 5,593
 4,873
 4,527
 4,266
Operation and maintenance 2,737
 2,890
 3,057
 2,671
 2,737
 2,890
Depreciation, decommissioning and amortization 1,998
 1,915
 1,720
Depreciation and amortization 2,032
 1,998
 1,915
Property and other taxes 351
 334
 318
 372
 351
 334
Impairment and other charges 
 
 163
 716
 
 
Other operating income (8) 
 
Total operating expenses 9,613
 9,405
 10,851
 10,656
 9,613
 9,405
Operating income 2,217
 2,080
 2,529
 1,598
 2,217
 2,080
Interest and other income 123
 123
 122
 145
 123
 123
Interest expense (541) (526) (533) (589) (541) (526)
Other expenses (44) (59) (79) (48) (44) (59)
Income before income taxes 1,755
 1,618
 2,039
 1,106
 1,755
 1,618
Income tax expense 256
 507
 474
 (30) 256
 507
Net income 1,499
 1,111
 1,565
 1,136
 1,499
 1,111
Less: Preferred and preference stock dividend requirements 123
 113
 112
 124
 123
 113
Net income available for common stock $1,376
 $998
 $1,453
 $1,012
 $1,376
 $998

Consolidated Statements of Comprehensive Income
    
 Years ended December 31, Years ended December 31,
(in millions) 2016 2015 2014 2017 2016 2015
Net income $1,499
 $1,111
 $1,565
 $1,136
 $1,499
 $1,111
Other comprehensive income (loss), net of tax:      
Other comprehensive income, net of tax:      
Pension and postretirement benefits other than pensions:            
Net gain (loss) arising during period plus amortization included in net income 1
 5
 (19)
Net loss arising during period plus amortization included in net income 1
 1
 5
Prior service cost arising during the period plus amortization included in net income 
 1
 
 
 
 1
Other 1
 
 2
 
 1
 
Other comprehensive income (loss), net of tax 2
 6
 (17)
Other comprehensive income, net of tax 1
 2
 6
Comprehensive income $1,501
 $1,117
 $1,548
 $1,137
 $1,501
 $1,117




Consolidated Balance SheetsSouthern California Edison Company

 December 31, December 31,
(in millions) 2016 2015 2017 2016
ASSETS        
Cash and cash equivalents $39
 $26
 $515
 $39
Receivables, less allowances of $61 and $62 for uncollectible accounts at respective dates 699
 724
Receivables, less allowances of $53 and $61 for uncollectible accounts at respective dates 693
 699
Accrued unbilled revenue 369
 564
 212
 369
Inventory 239
 256
 242
 239
Income tax receivables 229
 16
Prepaid expenses 228
 98
Derivative assets 73
 79
 105
 73
Regulatory assets 350
 560
 703
 350
Other current assets 262
 234
 160
 148
Total current assets 2,031
 2,443
 3,087
 2,031
Nuclear decommissioning trusts 4,242
 4,331
 4,440
 4,242
Other investments 50
 168
 52
 50
Total investments 4,292
 4,499
 4,492
 4,292
Utility property, plant and equipment, less accumulated depreciation of $9,000 and $8,548 at respective dates 36,806
 34,945
Nonutility property, plant and equipment, less accumulated depreciation of $89 and $81 at respective dates 75
 73
Utility property, plant and equipment, less accumulated depreciation and amortization of $9,355 and $9,000 at respective dates 38,708
 36,806
Nonutility property, plant and equipment, less accumulated depreciation of $97 and $89 at respective dates 77
 75
Total property, plant and equipment 36,881
 35,018
 38,785
 36,881
Derivative assets 1
 84
Regulatory assets 7,455
 7,512
 4,914
 7,455
Other long-term assets 231
 239
 237
 232
Total long-term assets 7,687
 7,835
 5,151
 7,687
        
        
        
        
        
        
        
Total assets $50,891
 $49,795
 $51,515
 $50,891


Consolidated Balance SheetsSouthern California Edison Company

 December 31, December 31,
(in millions, except share amounts) 2016 2015 2017 2016
LIABILITIES AND EQUITY        
Short-term debt $769
 $49
 $1,238
 $769
Current portion of long-term debt 579
 79
 479
 579
Accounts payable 1,344
 1,299
 1,519
 1,344
Accrued taxes 45
 46
 24
 45
Customer deposits 269
 242
 281
 269
Derivative liabilities 216
 218
 1
 216
Regulatory liabilities 756
 1,128
 1,121
 756
Other current liabilities 729
 760
 1,224
 729
Total current liabilities 4,707
 3,821
 5,887
 4,707
Long-term debt 9,754
 10,460
 10,428
 9,754
Deferred income taxes and credits 9,886
 9,073
 5,890
 9,886
Derivative liabilities 941
 1,100
 
 941
Pensions and benefits 896
 1,284
 483
 896
Asset retirement obligations 2,586
 2,762
 2,892
 2,586
Regulatory liabilities 5,726
 5,676
 8,614
 5,726
Other deferred credits and other long-term liabilities 1,912
 1,947
 2,649
 1,912
Total deferred credits and other liabilities 21,947
 21,842
 20,528
 21,947
Total liabilities 36,408
 36,123
 36,843
 36,408
Commitments and contingencies (Note 11) 

 

 

 

Common stock, no par value (560,000,000 shares authorized; 434,888,104 shares issued and outstanding at each date) 2,168
 2,168
 2,168
 2,168
Additional paid-in capital 657
 652
 671
 657
Accumulated other comprehensive loss (20) (22) (19) (20)
Retained earnings 9,433
 8,804
 9,607
 9,433
Total common shareholder's equity 12,238
 11,602
 12,427
 12,238
Preferred and preference stock 2,245
 2,070
 2,245
 2,245
Total equity 14,483
 13,672
 14,672
 14,483
Total liabilities and equity $50,891
 $49,795
 $51,515
 $50,891



Consolidated Statements of Cash Flows Southern California Edison Company  Southern California Edison Company 
    

Years ended December 31,
Years ended December 31,
(in millions)
2016
2015
2014
2017
2016
2015
Cash flows from operating activities:
 
 
 
 
 
 
Net income
$1,499

$1,111

$1,565

$1,136

$1,499

$1,111
Adjustments to reconcile to net cash provided by operating activities:
 
 
 
 
 
 
Depreciation, decommissioning and amortization
2,085

1,996

1,810
Depreciation and amortization
2,101

2,085

1,996
Allowance for equity during construction
(74)
(87)
(65)
(87)
(74)
(87)
Impairment and other charges




163

716




Deferred income taxes and investment tax credits
88

308

462

304

88

308
Other
9

14

11

12

9

14
Nuclear decommissioning trusts (179) (428) 39
 (197) (179) (428)
Changes in operating assets and liabilities:
 
 
 
 
 
 
Receivables
25

25

64

6

25

25
Inventory
(3)
19

(19)
(11)
(3)
19
Accounts payable
45

30

12

50

45

30
Prepaid and accrued taxes
(16)
(16)
129
Tax receivables and payables
(234)
(16)
(16)
Other current assets and liabilities
185

(42)
(107)
69

185

(42)
Derivative assets and liabilities, net
13

45

(40)
(28)
13

45
Regulatory assets and liabilities, net
(292)
1,729

(358)
4

(292)
1,729
Other noncurrent assets and liabilities
138

(80)
(6)
(116)
138

(80)
Net cash provided by operating activities
3,523

4,624

3,660

3,725

3,523

4,624
Cash flows from financing activities:
 
 
 
 
 
 
Long-term debt issued or remarketed, net of discount and issuance costs of $17 and $2 for the years ended 2015 and 2014


1,413

498
Long-term debt issued or remarketed, net of premium, discount and issuance costs of $10 and $(17) for the years ended 2017 and 2015, respectively
1,445



1,413
Long-term debt matured or repurchased
(217)
(761)
(607)
(882)
(217)
(761)
Preferred stock issued, net
294

319

269
Preference stock issued, net
462

294

319
Preference stock redeemed
(125)
(325)


(475)
(125)
(325)
Short-term debt financing, net
719

(619)
490

469

719

(619)
Payments for stock-based compensation (86) (127) (78)
Receipts from stock option exercises 48
 76
 68
Dividends paid
(824)
(874)
(489)
(697)
(824)
(874)
Other (66) 35
 20
 (41) (15) 45
Net cash (used in) provided by financing activities
(219)
(812)
181
Net cash provided by (used in) financing activities
243

(219)
(812)
Cash flows from investing activities:
 
 
 
 
 
 
Capital expenditures
(3,633)
(4,210)
(3,857)
(3,740)
(3,633)
(4,210)
Proceeds from sale of nuclear decommissioning trust investments
3,212

3,506

2,617

5,239

3,212

3,506
Purchases of nuclear decommissioning trust investments
(3,033)
(3,132)
(2,661)
(5,042)
(3,033)
(3,132)
Life insurance policy loans proceeds
140





26

140


Other
23

12

44

25

23

12
Net cash used in investing activities
(3,291)
(3,824)
(3,857)
(3,492)
(3,291)
(3,824)
Net increase (decrease) in cash and cash equivalents
13

(12)
(16)
476

13

(12)
Cash and cash equivalents, beginning of year
26

38

54

39

26

38
Cash and cash equivalents, end of year
$39

$26

$38

$515

$39

$26



Consolidated Statements of Changes in EquitySouthern California Edison Company
Equity Attributable to Edison International    Equity Attributable to Edison International    
(in millions)Common
Stock
 Additional
Paid-in
Capital
 Accumulated
Other
Comprehensive
Loss
 Retained
Earnings
 Preferred
and
Preference
Stock
 Total
Equity
Common
Stock
 Additional
Paid-in
Capital
 Accumulated
Other
Comprehensive
Loss
 Retained
Earnings
 Preferred
and
Preference
Stock
 Total
Equity
Balance at December 31, 2013$2,168
 $592
 $(11) $7,594
 $1,795
 $12,138
Balance at December 31, 2014$2,168
 $618
 $(28) $8,454
 $2,070
 $13,282
Net income
 
 
 1,565
 
 1,565

 
 
 1,111
 
 1,111
Other comprehensive loss
 
 (17) 
 
 (17)
 
 6
 
 
 6
Dividends declared on common stock
 
 
 (525) 
 (525)
Dividends declared on preferred and preference stock
 
 
 (112) 
 (112)
Stock-based compensation
 20
 
 (64) 
 (44)
Noncash stock-based compensation
 12
 
 (4) 
 8
Issuance of preference stock
 (6) 
 
 275
 269
Balance at December 31, 2014$2,168
 $618
 $(28) $8,454
 $2,070
 $13,282
Net income
 
 
 1,111
 
 1,111
Other comprehensive income
 
 6
 
 
 6
Dividends declared on common stock
 
 
 (611) 
 (611)
 
 
 (611) 
 (611)
Dividends declared on preferred and preference stock
 
 
 (113) 
 (113)
 
 
 (113) 
 (113)
Stock-based compensation
 23
 
 (33) 
 (10)
 23
 
 (33) 
 (10)
Noncash stock-based compensation
 13
 
 
 
 13

 13
 
 
 
 13
Issuance of preference stock
 (6) 
 
 325
 319

 (6) 
 
 325
 319
Redemption of preference stock
 4
 
 (4) (325) (325)
 4
 
 (4) (325) (325)
Balance at December 31, 2015$2,168
 $652
 $(22) $8,804
 $2,070
 $13,672
$2,168
 $652
 $(22) $8,804
 $2,070
 $13,672
Net income
 
 
 1,499
 
 1,499

 
 
 1,499
 
 1,499
Other comprehensive income
 
 2
 
 
 2

 
 2
 
 
 2
Dividends declared on common stock
 
 
 (701) 
 (701)
 
 
 (701) 
 (701)
Dividends declared on preferred and preference stock
 
 
 (123) 
 (123)
 
 
 (123) 
 (123)
Stock-based compensation
 
 
 (44) 
 (44)
 
 ���
 (44) 
 (44)
Noncash stock-based compensation
 9
 
 
 
 9

 9
 
 
 
 9
Issuance of preference stock
 (6) 
 
 300
 294

 (6) 
 
 300
 294
Redemption of preference stock
 2
 
 (2) (125) (125)
 2
 
 (2) (125) (125)
Balance at December 31, 2016$2,168
 $657
 $(20) $9,433
 $2,245
 $14,483
$2,168
 $657
 $(20) $9,433
 $2,245
 $14,483
Net income
 
 
 1,136
 
 1,136
Other comprehensive income
 
 1
 
 
 1
Dividends declared on common stock
 
 
 (785) 
 (785)
Dividends declared on preferred and preference stock
 
 
 (124) 
 (124)
Stock-based compensation
 
 
 (38) 
 (38)
Noncash stock-based compensation
 12
 
 
 
 12
Issuance of preference stock
 (13) 
 
 475
 462
Redemption of preference stock
 15
 
 (15) (475) (475)
Balance at December 31, 2017$2,168
 $671
 $(19) $9,607
 $2,245
 $14,672





NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Note 1.    Summary of Significant Accounting Policies
Organization and Basis of Presentation
Edison International is the parent holding company of Southern California Edison Company ("SCE") and Edison Energy Group, Inc. ("Edison Energy Group"). SCE is an investor-owned public utility primarily engaged in the business of supplying and delivering electricity to an approximately 50,000 square mile area of southern California. Edison International is also the parent company of Edison Energy Group is a holding company for subsidiaries, including Edison Energy, LLC ("Edison Energy") and SoCore Energy LLC ("SoCore Energy"), engaged in pursuing competitive business opportunities across energy services, managed portfolio solutions, and distributed solar solutions for commercial and industrial customers. Such business activities are currently not material to report as a separate business segment. These combined notes to the consolidated financial statements apply to both Edison International and SCE unless otherwise described. Edison International's consolidated financial statements include the accounts of Edison International, SCE and other wholly owned and controlled subsidiaries. References to Edison International refer to the consolidated group of Edison International and its subsidiaries. References to Edison International Parent and Other refer to Edison International Parent and its nonutilitycompetitive subsidiaries. SCE's consolidated financial statements include the accounts of SCE and its wholly owned and controlled subsidiaries. All intercompany transactions have been eliminated from the consolidated financial statements.
Edison International's and SCE's accounting policies conform to accounting principles generally accepted in the United States of America, including the accounting principles for rate-regulated enterprises, which reflect the ratemaking policies of the California Public Utility Commission ("CPUC") and the Federal Energy Regulatory Commission ("FERC"). SCE applies authoritative guidance for rate-regulated enterprises to the portion of its operations in which regulators set rates at levels intended to recover the estimated costs of providing service, plus a return on net investments in assets, or rate base. Regulators may also impose certain penalties or grant certain incentives. Due to timing and other differences in the collection of electric utility revenue, these principles require an incurred cost that would otherwise be charged to expense by a
non-regulated entity to be capitalized as a regulatory asset if it is probable that the cost is recoverable through future rates; and conversely the principles require recording of a regulatory liability for amounts collected in rates to recover costs expected to be incurred in the future or amounts collected in excess of costs incurred and refundable to customers. In addition, SCE recognizes revenue and regulatory assets from alternative revenue programs, which enables the utility to adjust future rates in response to past activities or completed events, if certain criteria are met, even for programs that do not qualify for recognition of "traditional" regulatory assets and liabilities. SCE assesses, at the end of each reporting period, whether regulatory assets are probable of future recovery. See Note 10 for composition of regulatory assets and liabilities.
The preparation of financial statements in conformity with United States generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reported period. Actual results could differ from those estimates.
Cash Equivalents
Cash equivalents includes investments in money market funds. Generally, the carrying value of cash equivalents equals the fair value, as these investments have original maturities of three months or less. The cash equivalents were as follows:
Edison International SCEEdison International SCE
December 31,December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Money market funds$41
 $37
 $18
 $8
$1,024
 $41
 $483
 $18
Cash is temporarily invested until required for check clearing. Checks issued, but not yet paid by the financial institution, are reclassified from cash to accounts payable at the end of each reporting period as follows:
Edison International SCEEdison International SCE
December 31,December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Book balances reclassified to accounts payable$138
 $162
 $136
 $158
$64
 $138
 $63
 $136

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Restricted Cash
Edison International's restricted cash at December 31, 2017 and 2016 were $41 million and $18 million, respectively. Restricted cash primarily relates to funds held by SoCore Energy and its consolidated affiliates pursuant to project financing or purchase agreements; most of which are expected to lapse by the end of 2018.
Allowance for Uncollectible Accounts
Allowances for uncollectible accounts are provided based upon a variety of factors, including historical amounts written-off, current economic conditions and assessment of customer collectability.
Inventory
SCE's inventory is primarily composed of materials, supplies and spare parts, and generally stated at average cost.
Emission Allowances
SCE is allocated greenhouse gas ("GHG") allowances annually which it is then required to sell into quarterly auctions. GHG proceeds from the auctions are recorded as a regulatory liability to be refunded to customers. SCE purchases GHG allowances in quarterly auctions or from counterparties to satisfy its GHG emission compliance obligations and recovers such costs of GHG allowances from customers. GHG allowances held for use are classified as "Other current assets" on the consolidated balance sheets and are stated, similar to an inventory method, at the lower of weighted-average cost or market. SCE had GHG allowances of $113$127 million and $79$113 million at December 31, 20162017 and 2015,2016, respectively. GHG emission obligations were $95$129 million and $86$95 million at December 31, 20162017 and 2015,2016, respectively, and are classified as "Other current liabilities" on the consolidated balance sheets.
Property, Plant and Equipment
SCE plant additions, including replacements and betterments, are capitalized. Direct material and labor and indirect costs such as construction overhead, administrative and general costs, pension and benefits, and property taxes are capitalized as part of plant additions. The CPUC authorizes a capitalization rate for each of the indirect costs which are allocated to each project based on either labor or total costs.
Estimated useful lives (authorized by the CPUC) and weighted-average useful lives of SCE's property, plant and equipment, are as follows:
 Estimated Useful Lives
Weighted-Average
Useful Lives
Generation plant10 years to 5755 years3837 years
Distribution plant20 years to 60 years43 years
Transmission plant40 years to 65 years5352 years
General plant and other5 years to 60 years22 years
Depreciation of utility property, plant and equipment is computed on a straight-line, remaining-life basis. Depreciation expense was $1.61 billion, $1.52 billion and $1.42 billion for 2017, 2016 and $1.33 billion for 2016, 2015, and 2014, respectively. Depreciation expense stated as a percent of average original cost of depreciable utility plant was, on a composite basis, 3.8%, 3.8% and 3.9% for 2017, 2016 and 4.0% for 2016, 2015, and 2014, respectively. Replaced orThe original costs of retired property costs areis charged to accumulated depreciation.
Nuclear fuel for the Palo Verde Nuclear Power PlantGenerating Station ("Palo Verde") is recorded as utility plant (nuclear fuel in the fabrication and installation phase is recorded as construction in progress) in accordance with CPUC ratemaking procedures. NuclearPalo Verde nuclear fuel is amortized using the units of production method.
AFUDCAllowance for funds used during construction ("AFUDC") represents the estimated cost of debt and equity funds that finance utility-plant construction and is capitalized during certain plant construction. AFUDC is recovered in rates through depreciation expense over the useful life of the related asset. AFUDC equity represents a method to compensate SCE for the estimated cost of equity used to finance utility plant additions and is recorded as part of construction in progress. AFUDC equity was $87 million, $74 million and $87 million in 2017, 2016 and $65 million in 2016, 2015, and 2014, respectively, and is reflected in "Interest and other income." AFUDC debt was $28 million, $23 million and $31 million in 2017, 2016 and $25 million in 2016, 2015, and 2014, respectively and is reflected as a reduction of "Interest expense."

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Major Maintenance
Major maintenance costs for SCE's power plant facilities and equipment are expensed as incurred.
Impairment of Long-Lived Assets
Impairments of long-lived assets are evaluated based on a review of estimated future cash flows expected to be generated whenever events or changes in circumstances indicate that the carrying amount of such investments or assets may not be

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recoverable. If the carrying amount of a long-lived asset exceeds expected future cash flows, undiscounted and without interest charges, an impairment loss is recognized in the amount of the excess of fair value over the carrying amount. Fair value is determined via market, cost and income based valuation techniques, as appropriate. SCE's impaired assets are recorded as a regulatory asset if it is deemed probable that such amounts will be recovered from customers.
In 2014, the CPUC approved the San Onofre OII Settlement Agreement that SCE had entered into with a number of intervening parties. The San Onofre OII Settlement Agreement had resolved the CPUC's investigation regarding the Steam Generator Replacement Project at San Onofre and the related outages and subsequent shutdown of San Onofre. In 2014, SCE had recorded a pre-tax impairment charge of approximately $163 million (approximately $72 million after-tax). Including amounts previously recorded as an impairment charge in 2013, the total impact of the San Onofre OII Settlement Agreement was a pre-tax charge of $738 million (approximately $437 million after-tax).
In a December 2016 joint ruling, the Assigned Commissioner and the Assigned ALJ directed SCE to meet and confer with the other parties in the OII to consider changing the terms of the San Onofre OII Settlement Agreement. See Note 11 for further information.
Goodwill
Edison International assesses goodwill through annual goodwill impairment tests, at the reporting unit level as of October 1st of each year. The fair value of the Edison Energy and SoCore Energy reporting units exceeded their carrying values at the date of the annual impairment analysis. As of December 31, 2016, goodwill is comprised of $78 million at the Edison Energy reporting unit and $22 million at the SoCore Energy reporting unit. Edison International will update these tests between annual tests if events occur or circumstances change such that it is more likely than not that the fair value of a reporting unit is below its carrying value. During 2017, Edison International completed a strategic review of Edison Energy Group's competitive businesses. Edison International has concluded that it will evaluate strategic options, including potential sale opportunities, for SoCore Energy. In connection with the strategic review of the Edison Energy Group's competitive businesses, Edison International evaluated the recoverability of goodwill and recorded an impairment of SoCore Energy's goodwill totaling $16.5 million ($10 million after-tax) in the second quarter of 2017.
The fair value of the Edison Energy and SoCore Energy reporting units exceeded their carrying values at the date of the impairment analysis. As of December 31, 2017 and 2016, goodwill is comprised of $78 million at each year end at the Edison Energy reporting unit and $5 million and $22 million, respectively, at the SoCore Energy reporting unit.
Nuclear Decommissioning and Asset Retirement Obligations
The fair value of a liability for an asset retirement obligation ("ARO") is recorded in the period in which it is incurred, including a liability for the fair value of a conditional ARO, if the fair value can be reasonably estimated even though uncertainty exists about the timing and/or method of settlement. When an ARO liability is initially recorded, SCE capitalizes the cost by increasing the carrying amount of the related long-lived asset. For each subsequent period, the liability is increased for accretion expense and the capitalized cost is depreciated over the useful life of the related asset.
AROs related to decommissioning of SCE's nuclear power facilities are based on site-specific studies conducted as part of each Nuclear Decommissioning Cost Triennial Proceeding ("NDCTP") conducted before the CPUC. Revisions of an ARO are established for updated site-specific decommissioning cost estimates.
SCE adjusts its nuclear decommissioning obligation into a nuclear-related ARO regulatory asset and also records an ARO regulatory liability as a result of timing differences between the recognition of costs and the recovery of costs through the ratemaking process. For further discussion,information, see Notes 9 and 10.
SCE has not recorded an asset retirement obligation for assets that are expected to operate indefinitely or where SCE cannot estimate a settlement date (or range of potential settlement dates). As such, ARO liabilities are not recorded for certain retirement activities, including certain hydroelectric facilities.
The following table summarizes the changes in SCE's ARO liability, including San Onofre Nuclear Generating Station ("San Onofre") and Palo Verde:
December 31,December 31,
(in millions)2016 20152017 2016
Beginning balance$2,762
 $2,819
$2,586
 $2,762
Accretion1
157
 173
166
 157
Revisions(165) (14)376
 (165)
Liabilities settled(168) (216)(236) (168)
Ending balance$2,586
 $2,762
$2,892
 $2,586
1 
An ARO represents the present value of a future obligation. Accretion is an increase in the liability to account for the time value of money resulting from discounting.

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The recorded liability to decommission SCE's nuclear power facilities (included in the table above) is $2.5$2.6 billion as of December 31, 2016.2017. In 2016, SCE updated the recorded liability for Palo Verde and San Onofre Unit 1 based on the 2013 decommissioning study performed for Palo Verde and the 2014 study for San Onofre Unit 1. TheIn 2017, SCE further revised the recorded liability for Palo Verde and San Onofre UnitUnits 2 and 3 is based on a 2014 decommissioningupdated cost estimates, including changes related to onboarding the general contractor. The final site specific study which followed the decision to permanently retire San Onofre. The 2015 NDTCP filing is expected to be updated for San Onofre Units 2 and 3 after onboardingis expected to be filed in March 2018 as part of the decommissioning general contractor and2018 NDCTP which may result in additional changes to the subsequent development of a new decommissioning cost estimate during 2017.ARO estimate.
Decommissioning costs, which are recovered through customer rates over the term of each nuclear facility's operating license, are recorded as a component of depreciation expense, with a corresponding credit to the ARO regulatory liability. Amortization of the ARO asset (included within the unamortized nuclear investment) and accretion of the ARO liability are deferred as increases to the ARO regulatory liability account, resulting in no impact on earnings.
SCE has collected in rates amounts for the future costs of removaldecommissioning of its nuclear assets, and has placed those amounts in independent trusts. The cost of removal amounts,Amounts collected in rates in excess of amounts collected for assets not legally required to be removed,the ARO liability are classified as regulatory liabilities.
Changes in the estimated costs, timing of decommissioning or the assumptions underlying these estimates could cause material revisions to the estimated total cost to decommission. SCE currently estimates that it will spend approximately $6.3$7.2 billion through 2079 to decommission its nuclear facilities. This estimate is based on SCE's decommissioning cost methodology used for ratemaking purposes, escalated at rates ranging from 1.7%1.6% to 7.5% (depending on the cost element) annually. These costs are expected to be funded from independent decommissioning trusts. SCE estimates annual after-tax earnings on the decommissioning funds of 2.4% to 4.1%3.8%. Future decommissioning costs related to SCE's nuclear assets are expected to be funded from independent decommissioning trusts. If the assumed return on trust assets is not earned or costs escalate at higher rates, SCE expects that additional funds needed for decommissioning will be recoverable through future rates. See Note 9 for further information.
Due to regulatory recovery of SCE's nuclear decommissioning expense, prudently incurred costs for nuclear decommissioning activities do not affect SCE's earnings. SCE's nuclear decommissioning costs are subject to CPUC review through the triennial regulatory proceeding. SCE's nuclear decommissioning trust investments primarily consist of fixed income and equity investments that are classified as available-for-sale. Due to regulatory mechanisms, earnings and realized gains and losses (including other-than-temporary impairments) have no impact on electric utility revenue.earnings. Unrealized gains and losses on decommissioning trust funds increase or decrease the trust assets and the related regulatory asset or liability and have no impact on electric utility revenue or decommissioning expense. SCE reviews each security for other-than-temporary impairment on the last day of each month. If the fair value on the last day of two consecutive months is less than the cost for that security, SCE recognizes a loss for the other-than-temporary impairment. If the fair value is greater or less than the costcarrying value for that security at the time of sale, SCE recognizes a related realized gain or loss, respectively.
Deferred Financing Costs
Debt premium, discount and issuance expenses incurred in connection with obtaining financing are deferred and amortized on a straight-line basis. Under CPUC ratemaking procedures, SCE's debt reacquisition expenses are amortized over the remaining life of the reacquired debt or, if refinanced, the life of the new debt. SCE had unamortized losses on reacquired debt of $184$168 million and $201$184 million at December 31, 20162017 and 2015,2016, respectively, reflected as long-term "Regulatory assets" in the consolidated balance sheets. Edison International and SCE had unamortized debt issuance costs related to issuances under the credit facilities of $15 million and $7 million at December 31, 2017, respectively, and $10 million and $7 million at December 31, 2016, respectively, and $11 million and $7 million at December 31, 2015, respectively, reflected in "Other long-term assets" on the consolidated balance sheets. In addition, Edison International and SCE had debt issuance costs related to issuances of long-term debt of $88 million and $77 million at December 31, 2017, respectively, and $81 million and $71 million at December 31, 2016, respectively, and $81 million and $77 million at December 31, 2015, respectively, reflected as a reduction of "Long-term debt" on the consolidated balance sheets.
Amortization of deferred financing costs charged to interest expense is as follows:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Amortization of deferred financing costs charged to interest expense$31
 $33
 $36
 $27
 $28
 $32
$30
 $31
 $33
 $27
 $27
 $28

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Revenue Recognition
Revenue is recognized when electricity is delivered and includes amounts for services rendered but unbilled at the end of each reporting period andas reflected in "Operating revenue" on the consolidated statements of income. Rates charged to customers are based on CPUC- and FERC-authorized revenue requirements. CPUC rates are implemented subsequent to final approval.
CPUC rates decouple authorized revenue from the volume of electricity sales. Differences between amounts collected and authorized levels are either collected from or refunded to customers, and therefore, SCE earns revenue equal to amounts authorized. FERC rates also decouple revenue from volume of electricity sales. In November 2013, the FERC approved a formula rate effective January 1, 2012 to determine SCE's FERC transmission revenue requirement, including its construction work in progress ("CWIP") revenue requirement. Under operation of the formula rate, transmission revenue will be updated to actual cost of service annually. Differences between amounts collected and determined under the formula rate are either collected from or refunded to customers, and therefore, SCE earns revenue based on estimates of recorded rate base costs under the FERC formula rate.
SCE bills certain sales and use taxes levied by state or local governments to its customers. Included in these sales and use taxes are franchise fees, which SCE pays to various municipalities (based on contracts with these municipalities) in order to operate within the limits of the municipality. SCE bills these franchise fees to its customers based on a CPUC-authorized rate. These franchise fees, which are required to be paid regardless of SCE's ability to collect from the customer, are accounted for on a gross basis and reflected in electric utility revenue and other operation and maintenance expense. SCE's franchise fees billed to customers and recorded as revenue were $133 million, $111 million and $138 million in 2017, 2016 and $134 million in 2016, 2015, and 2014, respectively. When SCE acts as an agent, the taxes are accounted for on a net basis. Amounts billed to and collected from customers for these taxes are remitted to the taxing authorities and are not recognized as electric utility revenue.
Power Purchase Agreements
SCE enters into power purchase agreements in the normal course of business. A power purchase agreement may be considered a variable interest in a variable interest entity. Under this classification, the power purchase agreement is evaluated to determine ifentity ("VIE"). If SCE is the primary beneficiary in the variable interest entity, in which case, such entity would be consolidated.VIE, SCE should consolidate the VIE. None of SCE's power purchase agreements resulted in consolidation of a variable interest entityVIE at December 31, 20162017 and 2015.2016. See Note 3 for further discussion of power purchase agreements that are considered variable interests.
A power purchase agreement may also contain a lease for accounting purposes. This generally occurs when a power purchase agreement (signed or modified after June 30, 2003) designates a specific power plant in which the buyer purchases substantially all of the output and does not otherwise meet a fixed price per unit of output exception. SCE has a number of power purchase agreements that contain leases. SCE's recognition of lease expense conforms to the ratemaking treatment for SCE's recovery of the cost of electricity and is recorded in purchased power."Purchased power and fuel" on the consolidated statements of income. See Note 11 for further discussion of SCE's power purchase agreements, including agreements that are classified as operating and capital leases for accounting purposes.
A power purchase agreement that does not contain a lease may be classified as a derivative subjectwhich is recorded at fair value on the consolidated balance sheets. These power purchase agreements may be eligible for an election to designate as a normal purchase and sale, exception, in which case the power purchase agreement is classified as an executory contract and accounted for on an accrual basis. SCE purchases power under certain contracts that are not eligible for the normal purchase and sale exception and are recordedbasis as a derivative on the consolidated balance sheets at fair value. Most of SCE's qualifying facilities ("QFs") contracts are not required to be recorded on the consolidated balance sheets because they either do not meet the definition of a derivative or meet the normal purchase and sale exception.an executory contract. See Note 6 for further information on derivative instruments.
Power purchase agreements that do not meet the above classifications are accounted for on an accrual basis.
Derivative Instruments
SCE records derivative instruments on its consolidated balance sheets as either assets or liabilities measured at fair value unless otherwise exempted from derivative treatment as normal purchases or sales. The normal purchases and sales exception requires, among other things, physical delivery in quantities expected to be used or sold over a reasonable period in the normal course of business. During the third quarter of 2017, SCE designated certain derivative contracts as normal purchase and normal sale contracts, which resulted in a reclassification of $914 million from derivative liabilities to other liabilities. These liabilities will be amortized over the remaining contract terms.
Realized gains and losses from SCE's derivative instruments are expected to be recovered from or refunded to customers through regulatory mechanisms and, therefore, SCE's fair value changes have no impact on purchased-power expense or earnings. SCE does not use hedge accounting for derivative transactions due to regulatory accounting treatment.

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Where SCE's derivative instruments are subject to a master netting agreement and certain criteria are met, SCE presents its derivative assets and liabilities on a net basis on its consolidated balance sheets. In addition, derivative positions are offset

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against margin and cash collateral deposits. The results of derivative activities are recorded as part of cash flows from operating activities on the consolidated statements of cash flows. See Note 6 for further information on derivative instruments.
Leases
SCE enters into power purchase agreements that may contain leases, as discussed under "Power Purchase Agreements" above. SCE has also enteredenters into a number of agreements to lease property and equipment in the normal course of business. Minimum lease payments under SCE's operating leases are levelized (total minimum lease payments divided by the number of years of the lease)for property and recorded as rent expense over the terms of the leases. Lease payments in excess of the minimum are recorded as rent expense in the year incurred.
Capital leases are reported as long-term obligations on the consolidated balance sheets in "Other deferred credits and other long-term liabilities." As a rate-regulated enterprise, SCE's capital lease amortization expense and interest expenseequipment are reflected in "Purchased power"Operation and fuel"maintenance" on the consolidated statements of income.
Stock-Based Compensation
Stock options, performance shares, deferred stock units and restricted stock units have been granted under Edison International's long-term incentive compensation programs. Generally, Edison International does not issue new common stock for settlement of equity awards.awards, which are recorded as part of retained earnings. Rather, a third party is used to purchase shares from the market and deliver such shares for the settlement of option exercises, performance shares, deferred stock units and restricted stock units. Performance shares awarded in 2014 that are earned are settled half in cash and half in common stock, while theThe performance shares awarded in 2016 and 2015 that are earned are settled solely in cash. Deferred stock units and restricted stock units are settled in common stock; however, Edison International will substitute cash awards to the extent necessary to pay tax withholding or any government levies.
Stock-based compensation expense is recognized on a straight-line basis over the requisite service period.period and is based on the number of awards that are expected to vest. Edison International and SCE estimate the number of awards that are expected to vest rather than account for forfeitures when they occur. For awards granted to retirement-eligible participants, stock compensation expenses are recognized on a prorated basis over the initial year oryear. For awards granted to participants who become eligible for retirement during the requisite service period, stock compensation expenses are recognized over the period between the date of grant and the date the participant first becomes eligible for retirement. Under new accounting guidance adopted in 2016, share-based payments may create a permanent difference between the amount of compensation expense recognized for book and tax purposes. The tax impact of this permanent difference is recognized in earnings in the period it is created. Effective January 1, 2016, the excess tax benefits are classified as an operating activity along with other income tax cash flows on the statement of cash flows.
SCE Dividend Restrictions
The CPUC regulates SCE's capital structure which limits the dividends it may pay Edison International. Under CPUC regulations, SCE may make distributions to Edison International as long as the common equity component of SCE's capital structure remains at or above 48% on a 13-month weighted average basis. basis, or otherwise satisfies the CPUC requirements.
If the Revised San Onofre Settlement Agreement is approved by the CPUC, SCE may exclude the $448 million after-tax charge resulting from the implementation of the Revised San Onofre Settlement Agreement from its ratemaking capital structure. See Note 11 for discussion of the Revised San Onofre Settlement Agreement.
At December 31, 2016,2017, without excluding the $448 million after-tax charge, SCE's 13-month weighted-averageaverage common equity component of total capitalization was 50.4%50.0% and the maximum additional dividend that SCE could pay to Edison International under this limitation was approximately $585$511 million, resulting in a restriction on net assets of approximately $13.9$14.2 billion. If the Revised San Onofre Settlement Agreement had been approved by the CPUC at December 31, 2017, the common equity component of SCE's capital structure would have been 50.1% on a 13-month average basis.


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Earnings Per Share
Edison International computes earnings per common share ("EPS") using the two-class method, which is an earnings allocation formula that determines EPS for each class of common stock and participating security. Edison International's participating securities are stock-based compensation awards payable in common shares, including performance shares and restricted stock units, which earn dividend equivalents on an equal basis with common shares once the awards are vested. Performance shares awarded prior to 2015 that are earned are settled half in common shares and half in cash, while the performance shares awarded on or after 2015 that are earned are settled solely in cash. For further information, see Note 8. EPS attributable to Edison International common shareholders was computed as follows:
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014
(in millions, except per-share amounts)2017 2016 2015
Basic earnings per share – continuing operations:          
Income from continuing operations attributable to common shareholders$1,299
 $985
 $1,427
$565
 $1,299
 $985
Participating securities dividends
 (1) (1)
 
 (1)
Income from continuing operations available to common shareholders$1,299
 $984
 $1,426
$565
 $1,299
 $984
Weighted average common shares outstanding326
 326
 326
326
 326
 326
Basic earnings per share – continuing operations$3.99
 $3.02
 $4.38
$1.73
 $3.99
 $3.02
Diluted earnings per share – continuing operations:          
Income from continuing operations attributable to common shareholders$1,299
 $985
 $1,427
$565
 $1,299
 $985
Participating securities dividends
 (1) (1)
 
 (1)
Income from continuing operations available to common shareholders$1,299
 $984
 $1,426
$565
 $1,299
 $984
Income impact of assumed conversions1
 1
 1

 1
 1
Income from continuing operations available to common shareholders and assumed conversions$1,300
 $985
 $1,427
$565
 $1,300
 $985
Weighted average common shares outstanding326
 326
 326
326
 326
 326
Incremental shares from assumed conversions4
 3
 3
2
 4
 3
Adjusted weighted average shares – diluted330
 329
 329
328
 330
 329
Diluted earnings per share – continuing operations$3.94
 $2.99
 $4.33
$1.72
 $3.94
 $2.99
In addition to the participating securities discussed above, Edison International also may award stock options which are payable in common shares and are included in the diluted earnings per share calculation. Stock option awards to purchase 1,334,451, 167,795 2,046,045 and 125,3452,046,045 shares of common stock for the years ended December 31, 2017, 2016 2015 and 2014,2015, respectively, were outstanding, but were not included in the computation of diluted earnings per share because the effect would have been antidilutive.
Income Taxes
Edison International and SCE estimate their income taxes for each jurisdiction in which they operate. This involves estimating current period tax expense along with assessing temporary differences resulting from differing treatment of items (such as depreciation) for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included in the consolidated balance sheets. In December 2017, the Tax Cuts and Jobs Act ("Tax Reform") was signed into law. This comprehensive reform of tax law reduces the federal corporate income tax rate from 35% to 21% which resulted in the re-measurement of deferred taxes using the new tax rate. See Note 7 for further information.
Income tax expense includes the current tax liability from operations and the change in deferred income taxes during the year. Investment tax credits are deferred and amortized to income tax expense over the lives of the properties or the term of the power purchase agreement of the respective project.
Interest income, interest expense and penalties associated with income taxes are reflected in "Income tax expense" on the consolidated statements of income.
Edison International's eligible subsidiaries are included in Edison International's consolidated federal income tax and combined state tax returns. Edison International has tax-allocation and payment agreements with certain of its subsidiaries.

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Pursuant to an income tax-allocation agreement approved by the CPUC, SCE's tax liability is computed as if it filed its federal and state income tax returns on a separate return basis.

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Redeemable Noncontrolling Interest
Redeemable noncontrollingNoncontrolling interest represents the portion of equity ownership in an entity that is not attributable to the equity holders of Edison International and whichInternational. Noncontrolling interests held by third parties that have rights to put their ownership back to a subsidiary of Edison International.International are classified outside shareholders' equity as redeemable noncontrolling interest. Noncontrolling interest is initially recorded at fair value and is subsequently adjusted for income allocated to the noncontrolling interest and any distributions paid to the noncontrolling interest.
Certain solar projects for commercial customers are organized as limited liability companies and have noncontrolling equity investors (referred to as tax equity investors) which are entitled to allocations of earnings, tax attributes and cash flows in accordance with contractual agreements that vary over time. These entities are consolidated for financial reporting purposes but isare not subject to income taxes as the taxable income (loss) and investment tax credits are allocated to the respective owners. The total consolidated assets and liabilities of these entities were $299 million and $41 million, respectively, at December 31, 2017 and $74 million and $23 million, respectively, at December 31, 2016 and were $82 million and $32 million, respectively, at December 31, 2015.2016. Income (loss) of these entities areis allocated to the noncontrolling interest based on the hypothetical liquidation at book value ("HLBV") accounting method. The HLBV accounting method is an approach that calculates the change in the claims of each member on the net assets of the investment at the beginning and end of each period. Each member’smember's claim is equal to the amount each party would receive or pay if the net assets of the investment were to liquidate at book value. Under the contract provisions, the tax equity investors' claim on net assets decreases rapidly in early years due to allocation of tax benefits resulting in additional non-operating income allocated to Edison International ($921 million, $9 million and $16 million in 2017, 2016 and 2015, respectively).
New Accounting Guidance
Accounting Guidance Adopted
In April 2015, the FASB issued an accounting standards update that requires debt issuance costs to be presented in the balance sheet as a direct reduction from the carrying amount of the related debt liability, consistent with debt discounts. Previously, accounting guidance required these costs to be presented as a deferred charge asset. Edison International and SCE adopted this guidance in the first quarter of 2016. At December 31, 2016, the amount of debt issuance costs that are reflected as a reduction of "Long-term debt" was $71 million for SCE and $81 million for Edison International. At December 31, 2015, the amount of debt issuance costs that have been reclassified from "Other long-term assets" to a reduction of "Long-term debt" was $77 million for SCE and $81 million for Edison International.
In April 2015, the FASB issued an accounting standards update on fees paid by a customer for software licenses. This new standard provides guidance about whether a cloud computing arrangement includes a software license which may be capitalized in certain circumstances. If a cloud computing arrangement does not include a software license, then the arrangement should be accounted for as a service contract. Edison International and SCE adopted this guidance prospectively, effective January 1, 2016. The adoption of this standard did not have a material impact on Edison International's and SCE's consolidated financial statements.
In May 2015, the FASB issued an accounting standards update which removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using net asset value per share or its equivalent as a practical expedient. Edison International and SCE adopted in the fourth quarter of 2016. Certain prior year amounts have been retrospectively adjusted.
In March 2016, the FASB issued an accounting standards update to simplify the accounting for share-based payments. Under this new guidance, the tax effects related to share based payments are recorded through the income statement. Previously, tax benefits in excess of compensation cost ("windfalls") were recorded in equity, and tax deficiencies ("shortfalls") were recorded in equity to the extent of previous windfalls, and then to the income statement. In addition, as part of this new guidance an entity recognizes excess tax benefits regardless of whether the benefit reduces taxes payable in the current period, subject to normal valuation allowance considerations. Edison International and SCE adopted this guidance in the fourth quarter of 2016 using the modified retrospective approach, effective January 1, 2016. As a result, all excess tax benefits resulting from 2016 stock option exercises were reflected in the income statement. Income tax expense for Edison International and SCE was reduced by approximately $28 million and $13 million, respectively, for the year ended December 31, 2016. In addition, Edison International and SCE recorded an increase to beginning retained earnings for pre-2016 stock option exercises that had not been previously recorded in equity ($42 million and $6 million for Edison International and SCE, respectively). On a prospective basis, the excess tax benefits are classified as an operating activity along with other income tax cash flows on the statement of cash flows. Accruals of compensation costs are based on the number of awards that are expected to vest. Edison International and SCE made an accounting policy election to continue to estimate the number of awards that are expected to vest rather than account for forfeitures when they occur.


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Accounting Guidance Not Yet Adopted
In May 2014, the FASB issued an accounting standards update on revenue recognition including enhanced disclosures and further amended the standard in 2016.2016 and 2017. Under the new standard, revenue from contracts with customers is recognized when (or as) a good or service is transferred to the customer and the customer obtains control of the good or service. This standardFor the year ended December 31, 2017, approximately 95% of total operating revenue arises from SCE's tariff offerings that provide electricity to customers. For such arrangements, revenue from contracts with customers will be adopted on January 1, 2018.equivalent to the electricity supplied and billed in that period (including estimated billings). As such, there will not be a change in the timing or pattern of revenue recognition for such sales. Edison International and SCE have completedimplemented process changes necessary to comply with this standard's enhanced disclosure requirements. SCE will disaggregate customer contract revenue between revenue from earnings activities and revenue from cost-recovery activities. Some revenue arrangements, such as alternative revenue programs which include balancing account overcollections and undercollections, are excluded from the preliminary phases of their assessmentscope of the impact onnew standard and, therefore, will be accounted for and presented separately from revenue recognized from contracts with customers in the consolidated financial statements and do not believe the adoption of this standard will have a material impact on the results of operations.disclosures. Edison International and SCE anticipate adoptingwill adopt the standard by using the modified retrospective application which means thatmethod. Edison International and SCE wouldwill recognize thean immaterial cumulative effect of initially applying the revenue standard as an adjustment to the opening balance of retained earnings inon January 1, 2018.
In January 2016, the FASB issued an accounting standards update that amends the guidance on the classification and measurement of financial instruments. The amendments require equity investments (excluding those accounted for under the equity method or those that result in consolidation) to be measured at fair value, with changes in fair value recognized inthrough net income. It also amends certain disclosure requirements associated with the fair value of financial instruments. In addition, the new guidance requires financial assets and financial liabilities to be presented separately in the notes to the financial statements, grouped by measurement category and form of financial asset.assets. Edison International and SCE will adopt this guidance effective January 1, 2018. TheSCE's nuclear decommissioning trust investments contain equity investments that are classified as available-for-sale. Due to regulatory mechanisms, the change in fair value of these investments has no impact on net income and, therefore, the adoption of this standard iswill not expected to have a material impact on Edison International's and SCE's consolidated financial statements.
In February 2016, the FASB issued an accounting standards update related to lease accounting, including enhanced disclosures.effective January 1, 2019. Under the new standard, a lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified assets for a period of time in exchange for consideration. Lessees will need to recognize leases on the balance sheet as a right-of-use asset and a related lease liability, and classify the leases as either operating or finance. The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment,adjustments, such as for initial direct costs. OperatingEdison International operating leases will result in straight-line expense while finance leases will result in a

63




higher initial expense pattern due to the interest component. SCE, as a regulated entity, is permitted to continue to have straight-linerecognize expense for finance leases, assumingusing the timing that conforms to the regulatory rate recovery is based upon current payments.treatment. Lessees can elect to exclude from the balance sheet short-term contracts of one year or less. This guidance is effectiveThe standard requires retrospective application to previously issued financial statements for 2018 and 2017. Although permitted, Edison and SCE will not elect to adopt this standard prior to January 1, 2019. EarlyThe standard will provide entities with an optional transition method to apply the new requirements in the period of adoption is permitted, butwithout retrospective application to previous periods. Edison International and SCE do not expectare evaluating whether to elect early adoption.this optional transition method. The adoption of this standard is expected towill increase right-of-use assets and lease liabilities in Edison International's and SCE's consolidated balance sheets. Edison International and SCE are currently implementing a new lease accounting system and are evaluating the impact this standard will have on the results of operationsconsolidated balance sheets and statements of cash flows.lease disclosures.
In June 2016, theThe FASB issued an accounting standards update related to amend the guidance on the impairment of financial instruments.instruments, effective January 1, 2020. The new guidance addsprovides an impairment model, known as the current expected credit loss model, which is based on expected credit losses rather than incurred losses. This guidance applies to most debt instruments, trade receivables, lease receivables, financial guarantee contracts, and loan commitments. This guidance is effective on January 1, 2020. Edison International and SCE are currently evaluating the impact of this new guidance.
In August and November 2016, theThe FASB issued two accounting standards updates related to amend the guidance onstatement of cash flows. One standards update clarifies the presentation and classification of certain cash receipts and cash payments in the statement of cash flows and the other requires restricted cash to reduce diversitybe presented with cash and cash equivalents in practice. This guidance addresses eight specific cash flow classification issues, including debt prepayment or extinguishment costs, proceeds from the settlement of corporate-owned life insurance, distributions received from equity method investments and restricted cash. This standard also clarifies the application of the predominance principle where cash receipts and payments have aspects of more than one classstatement of cash flows. The new standard isThese standards are effective on January 1, 2018.2018 and require retrospective application. Restricted cash as of December 31, 2017 was $41 million at Edison International and SCEwas less than $1 million at SCE. Currently, the changes in restricted cash balances are currently evaluating this new guidance.reflected as operating or investing activities dependent on the nature of the activities.
In January 2017, the FASB issued an accounting standards update to simplify the accounting for goodwill impairment. This accounting standards update changes the procedural steps in applying the goodwill impairment test. A goodwill impairment will now be the amount by which a reporting unit’sunit's carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. Edison International will apply this guidance to the goodwill impairment test beginning in 2020.

In March 2017, the FASB issued an accounting standards update which amends the current requirements related to the presentation of the components of net periodic benefit cost for an entity's defined benefit pension and other postretirement plans. The adoption of this standard is not expected to have a material impact on Edison International's and SCE's financial position or results of operations, but will result in the separate presentation of service costs as an operating expense and non-service costs within other income and expense and limit the capitalization of benefit costs to the service cost component. For the year ended December 31, 2017, service costs totaled $169 million for Edison International and $164 million for SCE and the non-service component of net periodic benefit cost was income of $72 million for Edison International and $84 million for SCE. The new standards update is effective on January 1, 2018 and is required to be adopted retrospectively with respect to the income statement presentation requirement and prospectively for the capitalization requirement.
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Note 2.    Property, Plant and Equipment
SCE's property, plant and equipment included in the consolidated balance sheets is composed of the following:
December 31,December 31,
(in millions)2016 20152017 2016
Distribution$22,332
 $20,871
$23,633
 $22,332
Transmission12,549
 11,592
13,127
 12,549
Generation3,376
 3,138
3,468
 3,376
General plant and other4,633
 4,543
4,534
 4,633
Accumulated depreciation(9,000) (8,548)(9,355) (9,000)
33,890
 31,596
35,407
 33,890
Construction work in progress2,790
 3,218
3,175
 2,790
Nuclear fuel, at amortized cost126
 131
126
 126
Total utility property, plant and equipment$36,806
 $34,945
$38,708
 $36,806

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Capitalized Software Costs
SCE capitalizes costs incurred during the application development stage of internal use software projects to property, plant, and equipment. SCE amortizes capitalized software costs ratably over the expected lives of the software, primarily ranging from 5 to 1510 years and commencing upon operational use. Capitalized software costs, included in general plant and other above, were $1.41.1 billion and $1.4 billion at both December 31, 2017 and 2016, and 2015respectively, and accumulated amortization was $0.80.6 billion and $0.90.8 billion, at December 31, 20162017 and 2015,2016, respectively. Amortization expense for capitalized software was $249233 million, $268249 million and $271268 million in 2017, 2016, 2015 and 2014,2015, respectively. At December 31, 2016,2017, amortization expense is estimated to be approximately $243$176 million, annually$127 million, $92 million, $62 million and $26 million for 20172018 through 2021.2022, respectively.
Jointly Owned Utility Projects
SCE owns undivided interests in several generating assets for which each participant provides its own financing. SCE's proportionate share of these assets is reflected in the consolidated balance sheets and included in the above table. SCE's proportionate share of expenses for each project is reflected in the consolidated statements of income. A portion of the investments in Palo Verde generating stations is included in regulatory assets on the consolidated balance sheets. For further information, see Note 10.
The following is SCE's investment in each asset as of December 31, 2016:2017:
(in millions)Plant in ServiceConstruction Work in Progress
Accumulated
Depreciation
Nuclear Fuel
(at amortized cost)
Net Book Value
Ownership
Interest
Plant in ServiceConstruction Work in Progress
Accumulated
Depreciation
Nuclear Fuel
(at amortized cost)
Net Book Value
Ownership
Interest
Transmission systems:    
Eldorado$235
$10
$21
$
$224
59%$237
$14
$24
$
$227
59%
Pacific Intertie192
21
80

133
50%192
41
78

155
50%
Generating station:    
Palo Verde (nuclear)1,959
62
1,547
126
600
16%2,001
52
1,557
126
622
16%
Total$2,386
$93
$1,648
$126
$957
 $2,430
$107
$1,659
$126
$1,004
 
In addition, SCE has ownership interests in jointly owned power poles with other companies.

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Note 3.    Variable Interest Entities
A VIE is defined as a legal entity that meets one of two conditions: (1) the equity owners do not have sufficient equity at risk, or (2) the holders of the equity investment at risk, as a group, lack any of the following three characteristics: decision-making rights, the obligation to absorb losses, or the right to receive the expected residual returns of the entity. The primary beneficiary is identified as the variable interest holder that has both the power to direct the activities of the VIE that most significantly impact the entity's economic performance and the obligation to absorb losses or the right to receive benefits from the entity that could potentially be significant to the VIE. The primary beneficiary is required to consolidate the VIE. A subsidiary of Edison International is the primary beneficiary of entities that own rooftop solar projects (for further information, see Note 1—Redeemable Noncontrolling Interests). Commercial and operating activities are generally the factors that most significantly impact the economic performance of such VIEs. Commercial and operating activities include site and equipment selection, construction, operation and maintenance, fuel procurement, dispatch and compliance with regulatory and contractual requirements.
Variable Interest in VIEs that are not Consolidated
Power Purchase ContractsAgreements
SCE has power purchase agreements ("PPAs") that are classified as variable interests in VIEs, including tolling agreements through which SCE provides the natural gas to fuel the plants and contracts with QFsqualifying facilities ("QFs") that contain variable pricing provisions based on the price of natural gas. SCE has concluded that it is not the primary beneficiary of these VIEs since it does not control the commercial and operating activities of these entities. Since payments for capacity are the primary source of income, the most significant economic activity for these VIEs is the operation and maintenance of the power plants.
As of the balance sheet date, the carrying amount of assets and liabilities in SCE's consolidated balance sheet that relate to its involvement with VIEs result from amounts due under the PPAs or the fair value of those derivative contracts.PPAs. Under these contracts, SCE recovers the costs incurred

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through demonstration of compliance with its CPUC-approvedCalifornia Public Utilities Commission ("CPUC")-approved long-term power procurement plans. SCE has no residual interest in the entities and has not provided or guaranteed any debt or equity support, liquidity arrangements, performance guarantees or other commitments associated with these contracts other than the purchase commitments described in Note 11. As a result, there is no significant potential exposure to loss to SCE from its variable interest in these VIEs. The aggregate contracted capacity dedicated to SCE from these VIE projects was 4,353 MW4,898 megawatts ("MW") and 4,0624,353 MW at December 31, 20162017 and 2015,2016, respectively, and the amounts that SCE paid to these projects were $788$767 million and $640$788 million for the years ended December 31, 20162017 and 2015,2016, respectively. These amounts are recoverable in customer rates, subject to reasonableness review.
Unconsolidated Trusts of SCE
SCE Trust I, Trust II, Trust III, Trust IV, Trust V and Trust VVI were formed in 2012, 2013, 2014, 2015, 2016 and 20162017, respectively, for the exclusive purpose of issuing the 5.625%, 5.10%, 5.75%, 5.375%, 5.45% and 5.45%5.00% trust preference securities, respectively ("trust securities"). The trusts are VIEs. SCE has concluded that it is not the primary beneficiary of these VIEs as it does not have the obligation to absorb the expected losses or the right to receive the expected residual returns of the trusts. SCE Trust I, Trust II, Trust III, Trust IV, Trust V and Trust VVI issued to the public trust securities in the face amounts of $475 million, $400 million, $275 million, $325 million, $300 million, and $300$475 million (cumulative, liquidation amounts of $25 per share), respectively, and $10,000 of common stock each to SCE. The trusts invested the proceeds of these trust securities in Series F, Series G, Series H, Series J, Series K and Series KL Preference Stock issued by SCE in the principal amounts of $475 million, $400 million, $275 million, $325 million, $300 million, and $300$475 million (cumulative, $2,500 per share liquidation values), respectively, which have substantially the same payment terms as the respective trust securities.
The Series F, Series G, Series H, Series J, Series K, and Series KL Preference Stock and the corresponding trust securities do not have a maturity date. Upon any redemption of any shares of the Series F, Series G, Series H, Series J, Series K or Series KL Preference Stock, a corresponding dollar amount of trust securities will be redeemed by the applicable trust (see Note 12 for further information). The applicable trust will make distributions at the same rate and on the same dates on the applicable series of trust securities if and when the SCE board of directors declares and makes dividend payments on the related Preference Stock. The applicable trust will use any dividends it receives on the related Preference Stock to make its corresponding distributions on the applicable series of trust securities. If SCE does not make a dividend payment to any of these trusts, SCE would be prohibited from paying dividends on its common stock. SCE has fully and unconditionally guaranteed the payment of the trust securities and trust distributions, if and when SCE pays dividends on the related Preference Stock.

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TheIn July 2017, SCE Trust I redeemed $475 million of trust securities from the public and $10,000 of common stock from SCE. As a result in September 2017, SCE Trust I was terminated. The Trust II, Trust III, Trust IV, and Trust IVV balance sheets as of December 31, 20162017 and 20152016, consisted of investments of $475 million, $400 million, $275 million, $325 million, and $325$300 million in the Series F, Series G, Series H, Series J, and Series JK Preference Stock, respectively, $475 million, $400 million, $275 million, $325 million, and $325$300 million of trust securities, respectively, and $10,000 each of common stock. The Trust VVI balance sheet as of December 31, 20162017 consisted of investments of $300$475 million in the Series KL Preference Stock, $300$475 million of trust securities, and $10,000 of common stock.
The following table provides a summary of the trusts' income statements:

Years ended December 31,Years ended December 31,
(in millions)Trust I Trust II Trust III Trust IV Trust VTrust I Trust II Trust III Trust IV Trust V Trust VI
2017           
Dividend income$14
 $20
 $16
 $17
 $16
 $12
Dividend distributions14
 20
 16
 17
 16
 12
2016                    
Dividend income$27
 $20
 $16
 $17
 $13
$27
 $20
 $16
 $17
 $13
 *
Dividend distributions27
 20
 16
 17
 13
27
 20
 16
 17
 13
 *
2015                    
Dividend income$27
 $20
 $16
 $6
 *
$27
 $20
 $16
 $6
 *
 *
Dividend distributions27
 20
 16
 6
 *
27
 20
 16
 6
 *
 *
2014         
Dividend income$27
 $20
 $13
 *
 *
Dividend distributions27
 20
 13
 *
 *
* Not applicable

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Note 4.    Fair Value Measurements
Recurring Fair Value Measurements
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 (referred to as an "exit price"). Fair value of an asset or liability considers assumptions that market participants would use in pricing the asset or liability, including assumptions about nonperformance risk. As of December 31, 20162017 and 2015,2016, nonperformance risk was not material for Edison International and SCE.
Assets and liabilities are categorized into a three-level fair value hierarchy based on valuation inputs used to determine fair value.
Level 1 – The fair value of Edison International's and SCE's Level 1 assets and liabilities is determined using unadjusted quoted prices in active markets that are available at the measurement date for identical assets and liabilities. This level includes exchange-traded equity securities, U.S. treasury securities, mutual funds and money market funds.
Level 2 – Edison International's and SCE's Level 2 assets and liabilities include fixed income securities, primarily consisting of U.S. government and agency bonds, municipal bonds and corporate bonds, and over-the-counter derivatives. The fair value of fixed income securities is determined using a market approach by obtaining quoted prices for similar assets and liabilities in active markets and inputs that are observable, either directly or indirectly, for substantially the full term of the instrument.
The fair value of SCE's over-the-counter derivative contracts is determined using an income approach. SCE uses standard pricing models to determine the net present value of estimated future cash flows. Inputs to the pricing models include forward published or posted clearing prices from exchanges (New York Mercantile Exchange and Intercontinental Exchange) for similar instruments and discount rates. A primary price source that best represents trade activity for each market is used to develop observable forward market prices in determining the fair value of these positions. Broker quotes, prices from exchanges or comparison to executed trades are used to validate and corroborate the primary price source. These price quotations reflect mid-market prices (average of bid and ask) and are obtained from sources believed to provide the most liquid market for the commodity.
Level 3 – The fair value of SCE's Level 3 assets and liabilities is determined using the income approach through various models and techniques that require significant unobservable inputs. This level includes tolling arrangements and derivative contracts that trade infrequently such as congestion revenue rights ("CRRs"). Edison International Parent and Other does not have any Level 3 assets and liabilities.

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Assumptions are made in order to value derivative contracts in which observable inputs are not available. Changes in fair value are based on changes to forward market prices, including extrapolation of short-term observable inputs into forecasted prices for illiquid forward periods. In circumstances where fair value cannot be verified with observable market transactions, it is possible that a different valuation model could produce a materially different estimate of fair value. Modeling methodologies, inputs and techniques are reviewed and assessed as markets continue to develop and more pricing information becomes available and the fair value is adjusted when it is concluded that a change in inputs or techniques would result in a new valuation that better reflects the fair value of those derivative contracts. See Note 6 for a discussion of fair value of derivative instruments.

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SCE
The following table sets forth assets and liabilities of SCE that were accounted for at fair value by level within the fair value hierarchy:
December 31, 2016December 31, 2017
(in millions)Level 1 Level 2 Level 3 
Netting
and
Collateral1
 TotalLevel 1 Level 2 Level 3 
Netting
and
Collateral1
 Total
Assets at fair value                  
Derivative contracts$
 $6
 $68
 $
 $74
$
 $9
 $102
 $(1) $110
Other33
 
 
 
 33
Money market funds and other495
 
 
 
 495
Nuclear decommissioning trusts:                  
Stocks2
1,547
 
 
 
 1,547
1,596
 
 
 
 1,596
Fixed Income3
865
 1,751
 
 
 2,616
1,065
 1,665
 
 
 2,730
Short-term investments, primarily cash equivalents36
 170
 
 
 206
101
 72
 
 
 173
Subtotal of nuclear decommissioning trusts4
2,448
 1,921
 
 
 4,369
2,762
 1,737
 
 
 4,499
Total assets2,481
 1,927
 68
 
 4,476
3,257
 1,746
 102
 (1) 5,104
Liabilities at fair value                  
Derivative contracts
 
 1,157
 
 1,157

 2
 1
 (2) 1
Total liabilities
 
 1,157
 
 1,157

 2
 1
 (2) 1
Net assets (liabilities)$2,481
 $1,927
 $(1,089) $
 $3,319
Net assets$3,257
 $1,744
 $101
 $1
 $5,103
 December 31, 2015
(in millions)Level 1 Level 2 Level 3 
Netting
and
Collateral1
 Total
Assets at fair value         
Derivative contracts$
 $
 $163
 $
 $163
Other28
 
 
 
 28
Nuclear decommissioning trusts: 
  
  
  
  
Stocks2
1,460
 
 
 
 1,460
Fixed Income3
947
 1,776
 
 
 2,723
Short-term investments, primarily cash equivalents91
 81
 
 
 172
Subtotal of nuclear decommissioning trusts4
2,498
 1,857
 
 
 4,355
Total assets2,526
 1,857
 163
 
 4,546
Liabilities at fair value         
Derivative contracts
 22
 1,311
 (15) 1,318
Total liabilities
 22
 1,311
 (15) 1,318
Net assets (liabilities)$2,526
 $1,835
 $(1,148) $15
 $3,228

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 December 31, 2016
(in millions)Level 1 Level 2 Level 3 
Netting
and
Collateral1
 Total
Assets at fair value         
Derivative contracts$
 $6
 $68
 $
 $74
Other33
 
 
 
 33
Nuclear decommissioning trusts: 
  
  
  
  
Stocks2
1,547
 
 
 
 1,547
Fixed Income3
865
 1,751
 
 
 2,616
Short-term investments, primarily cash equivalents36
 170
 
 
 206
Subtotal of nuclear decommissioning trusts4
2,448
 1,921
 
 
 4,369
Total assets2,481
 1,927
 68
 
 4,476
Liabilities at fair value         
Derivative contracts
 
 1,157
 
 1,157
Total liabilities
 
 1,157
 
 1,157
Net assets (liabilities)$2,481
 $1,927
 $(1,089) $
 $3,319
1 
Represents the netting of assets and liabilities under master netting agreements and cash collateral across the levels of the fair value hierarchy. Netting among positions classified within the same level is included in that level.
2 
Approximately 69% and 70% of SCE's equity investments were located in the United States at both December 31, 20162017 and 2015.2016, respectively.
3 
Includes corporate bonds, which were diversified and included collateralized mortgage obligations and other asset backed securities of $79$102 million and $111$79 million at December 31, 20162017 and 2015,2016, respectively.
4 
Excludes net payables of $127$59 million and $24$127 million at December 31, 20162017 and 2015,2016, which consist of interest and dividend receivables as well as receivables and payables related to SCE's pending securities sales and purchases.

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Edison International Parent and Other
Edison International Parent and Other assets measured at fair value consisted of money market funds of $541 million and $23 million and $29 millionat December 31, 20162017 and 2015,2016, respectively, classified as Level 1.
SCE Fair Value of Level 3
The following table sets forth a summary of changes in SCE's fair value of Level 3 net derivative assets and liabilities:
 December 31, December 31,
(in millions) 2016 2015 2017 2016
Fair value of net liabilities at beginning of period $(1,148) $(902) $(1,089) $(1,148)
Total realized/unrealized gains (losses):    
Total realized/unrealized gains:    
Included in regulatory assets and liabilities1
 59
 (246) 133
 59
Fair value of net liabilities at end of period $(1,089) $(1,148)
Contract amendment2
 143
 
Normal purchase and normal sale designation3
 914
 
Fair value of net assets (liabilities) at end of period $101
 $(1,089)
Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period $(70) $(311) $100
 $(70)
1 
Due to regulatory mechanisms, SCE's realized and unrealized gains and losses are recorded as regulatory assets and liabilities.
2 Represents a tolling contract that was amended during the second quarter of 2017, which is no longer accounted for as a derivative as of December 31, 2017.
3
During the third quarter of 2017, SCE designated certain derivative contracts as normal purchase and normal sale contracts, which resulted in a reclassification of $914 million from derivative liabilities to other liabilities. These liabilities will be amortized over the remaining contract terms.
Edison International and SCE recognize the fair value for transfers in and transfers out of each level at the end of each reporting period. There were no significantmaterial transfers between any levels during 20162017 and 2015.2016.
Valuation Techniques Used to Determine Fair Value
The process of determining fair value is the responsibility of SCE's risk management department, which reports to SCE's chief financial officer. This department obtains observable and unobservable inputs through broker quotes, exchanges and internal valuation techniques that use both standard and proprietary models to determine fair value. Each reporting period, the risk and finance departments collaborate to determine the appropriate fair value methodologies and classifications for each derivative. Inputs are validated for reasonableness by comparison against prior prices, other broker quotes and volatility fluctuation thresholds. Inputs used and valuations are reviewed period-over-period and compared with market conditions to determine reasonableness.

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The following table sets forth SCE's valuation techniques and significant unobservable inputs used to determine fair value for significant Level 3 assets and liabilities:
Fair Value (in millions) SignificantRangeFair Value (in millions) Significant 
Assets LiabilitiesValuation Technique(s)Unobservable Input(Weighted Average)Assets LiabilitiesValuation Technique(s)Unobservable Input
Range

Congestion revenue rightsCongestion revenue rights Congestion revenue rights 
December 31, 2017$102
 $
Market simulation model and auction pricesLoad forecast5,002 MW - 22,970 MW
    
Power prices1
$(15.00) - $120.00
    
Gas prices2
$2.46 - $4.37
    CAISO CRR auction clearing prices$(9.41) - $8.66
December 31, 2016$67
 $
Market simulation model and auction pricesLoad forecast3,708 MW - 22,840 MW67
 
Market simulation model and auction pricesLoad forecast3,708 MW - 22,840 MW
    
Power prices1
$3.65 - $99.58    
Power prices1
$3.65 - $99.58
    
Gas prices2
$2.51 - $4.87    
Gas prices2
$2.51 - $4.87
December 31, 2015152
 
Market simulation model and auction pricesLoad forecast6,289 MW - 24,349 MW
    
Power prices1
$0 - $110.44
    
Gas prices2
$1.98 - $5.72
Tolling    
Tolling3
    
December 31, 2016
 1,154
Option modelVolatility of gas prices15% - 48% (20%)
 1,154
Option modelVolatility of gas prices15% - 48%
    Volatility of power prices29% - 71% (40%)    Volatility of power prices29% - 71%
    Power prices$23.40 - $51.24 ($34.70)    Power prices$23.40 - $51.24
December 31, 201510
 1,297
Option modelVolatility of gas prices15% - 58% (20%)
    Volatility of power prices26% - 38% (30%)
    Power prices$24.15 - $46.93 ($34.80)
1    Prices are in dollars per megawatt-hour.
2    Prices are in dollars per million British thermal units.
3 During the third quarter of 2017, SCE designated certain derivative contracts as normal purchase and normal sale contracts, which resulted in a reclassification of $914 million from derivative liabilities to other liabilities. These liabilities will be amortized over the remaining contract terms.
Level 3 Fair Value Sensitivity
Congestion Revenue Rights
For CRRs, where SCE is the buyer, generally increases (decreases) in forecasted load in isolation would result in increases (decreases) to the fair value. In general, an increase (decrease) in electricity and gas prices at illiquid locations tends to result in increases (decreases) to fair value; however, changes in electricity and gas prices in opposite directions may have varying results on fair value.
Tolling Arrangements
The fair values of SCE's tolling arrangements contain intrinsic value and time value. Intrinsic value is the difference between the market price and strike price of the underlying commodity. Time value is made up of several components, including volatility, time to expiration, and interest rates. The option model for tolling arrangements reflects plant specific information such as operating and start-up costs.
For tolling arrangements where SCE is the buyer, increases in volatility of the underlying commodity prices would result in increases to fair value as it represents greater price movement risk. As power and gas prices increase, the fair value of tolling arrangements tends to increase. The valuation of tolling arrangements is also impacted by the correlation between gas and power prices. As the correlation increases, the fair value of tolling arrangements tends to decline.
Nuclear Decommissioning Trusts
SCE's nuclear decommissioning trust investments include equity securities, U.S. treasury securities and other fixed income securities. Equity and treasury securities are classified as Level 1 as fair value is determined by observable market prices in active or highly liquid and transparent markets. The remaining fixed income securities are classified as Level 2. The fair value of these financial instruments is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes, issuer spreads, bids, offers and relevant credit information. There are no securities classified as Level 3 in the nuclear decommissioning trusts.
SCE's investment policies and CPUC requirements place limitations on the types and investment grade ratings of the securities that may be held by the nuclear decommissioning trust funds. These policies restrict the trust funds from holding alternative investments and limit the trust funds' exposures to investments in highly illiquid markets. With respect to equity and fixed income securities, the trustee obtains prices from third-party pricing services which SCE is able to independently

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corroborate as described below. The trustee monitors prices supplied by pricing services, including reviewing prices against defined parameters' tolerances and performs research and resolves variances beyond the set parameters. SCE corroborates the fair values of securities by comparison to other market-based price sources obtained by SCE's investment managers. Differences outside established thresholds are followed-up with the trustee and resolved. For each reporting period, SCE reviews the trustee determined fair value hierarchy and overrides the trustee level classification when appropriate.

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Fair Value of Debt Recorded at Carrying Value
The carrying value and fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) are as follows:
December 31, 2016 December 31, 2015December 31, 2017 December 31, 2016
(in millions)
Carrying
Value1
 
Fair
Value
 
Carrying
Value1
 
Fair
Value
Carrying
Value1
 
Fair
Value
 
Carrying
Value1
 
Fair
Value
Edison International$11,156
 $12,368
 $11,178
 $12,252
$12,123
 $13,760
 $11,156
 $12,368
SCE10,333
 11,539
 10,539
 11,592
10,907
 12,547
 10,333
 11,539
1  
Carrying value is net of debt issuance costs.
The fair value of Edison International's and SCE's short-term and long-term debt is classified as Level 2 and is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes of new issue prices and relevant credit information.
The carrying value of Edison International's and SCE's trade receivables and payables, other investments, and short-term debt approximates fair value.
Note 5.    Debt and Credit Agreements
Long-Term Debt
The following table summarizes long-term debt (rates and terms are as of December 31, 2016)2017) of Edison International and SCE:
December 31,December 31,
(in millions)2016 20152017 2016
Edison International Parent and Other:      
Debentures and notes:      
2017 – 2023 (2.95% to 3.75%)$800
 $614
2020 – 2023 (2.125% to 2.95%)$1,200
 $800
Other long-term debt32
 31
29
 32
Current portion of long-term debt(402) (216)(2) (402)
Unamortized debt discount and issuance costs, net(9) (6)(13) (9)
Total Edison International Parent and Other421
 423
1,214
 421
SCE:      
First and refunding mortgage bonds:      
2017 – 2045 (1.125% to 6.05%)9,357
 9,436
2018 – 2047 (1.845% to 6.05%)9,779
 9,357
Pollution-control bonds:      
2028 – 2035 (1.375% to 5.0%)1
774
 909
909
 774
Debentures and notes:      
2029 – 2053 (5.06% to 6.65%)307
 307
307
 307
Current portion of long-term debt(579) (79)(479) (579)
Unamortized debt discount and issuance costs, net(105) (113)(88) (105)
Total SCE9,754
 10,460
10,428
 9,754
Total Edison International$10,175
 $10,883
$11,642
 $10,175
1 
Excludes outstanding bonds that have not been retired and may be remarketed to investors in the future. These bonds have variable rates and are due in 2031 at December 31, 2017 and 2031 and 2033 at December 31, 2016 and 2031 at December 31, 2015.2016.

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Edison International and SCE long-term debt maturities over the next five years are the following:
(in millions)Edison International SCEEdison International SCE
2017$981
 $579
2018482
 479
$481
 $479
201982
 79
81
 79
202080
 79
481
 79
2021580
 579
580
 579
2022777
 364
Project Financings
As of December 31, 20162017 and 2015,2016, indirect subsidiaries of Edison Energy Group owning solar projects had approximately $31 million (includes short-term debt of $16 million) and $22 million and $25 million outstanding under a 7-year term financing due inproject debt financings with maturity dates to 2022 at awith weighted average interest raterates of 3.50%4.50% and 3.11%4.86%. In addition,Remaining borrowings available under these agreements are approximately $67 million.
Under two of the tax equity financings, tax equity investors in theserelated solar projects receive 99% of taxable profits and losses and tax credits of the projects as determined for federal income tax purposes for a six-year6-year period following the completion of the portfolio of projects and receive a priority return of 2% of their investment per year. After the six-year6-year period, the tax equity investor receivesinvestors receive 5% of the taxable profits and losses and cash flow. A subsidiary of Edison Energy Group has a call option for a nine-month9-month period following five5 years after completion of the portfolio of projects to purchase the tax equity investors interest and theeach tax equity investor has the right to put its ownership interest to such subsidiary in the event that the call option is not exercised. Remaining tax equity financings under these agreements are approximately $21 million.
Under a third tax equity financing completed in 2017, the tax equity investor in the related solar projects will receive an initial allocation of 99% of taxable losses and tax credits, followed by 67% of taxable income and losses after the initial period and 28.4% of cash flows until certain conditions are met, including attaining a specified rate of return. A subsidiary of Edison Energy Group has the option after certain conditions are met to purchase the tax equity investor's interest at the higher of fair value or the after-tax amount necessary to achieve a specified 20-year rate of return. Remaining tax equity financings under these agreements are approximately $38 million.
An indirect subsidiary of Edison Energy Group also entered into a non-recourse debt financing to support equity contributions in certain solar projects through June 30, 2017.projects. The maturity date of the borrowings under this agreement is December 31, 2036. As of December 31, 20162017 and 2015,2016, there was $10 million and $6 million outstanding under this agreement at a weighted average interest rate of 9%.
Liens and Security Interests
Almost all of SCE's properties are subject to a trust indenture lien. SCE has pledged first and refunding mortgage bonds as collateral for borrowed funds obtained from pollution-control bonds issued by government agencies. SCE has a debt covenant that requires a debt to total capitalization ratio be met. At December 31, 2016,2017, SCE was in compliance with this debt covenant.covenant and all other financial covenants that affect access to capital.
All of the properties subject to the Edison Energy Group project financings discussed above are subject to a lien.
Credit Agreements and Short-Term Debt
The following table summarizes the status of the credit facilities at December 31, 2016:2017:
(in millions)Edison International Parent SCEEdison International Parent SCE
Commitment$1,250
 $2,750
$1,250
 $2,750
Outstanding borrowings(538) (769)(1,139) (1,238)
Outstanding letters of credit
 (91)
 (99)
Amount available$712
 $1,890
$111
 $1,413

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SCE and Edison International Parent have multi-year revolving credit facilities of $2.75 billion and $1.25 billion, respectively, with both maturing in July 2021.2022. SCE's credit facility is generally used to support commercial paper borrowings and letters of credit issued for procurement-related collateral requirements, balancing account undercollections and for general corporate purposes, including working capital requirements to support operations and capital expenditures. Edison International Parent's credit facility is used to support commercial paper borrowings and for general corporate purposes.
At December 31, 2016,2017, commercial paper supported by SCE's credit facility, net of discount, was $769$738 million at a weighted-average interest rate of 0.9%1.75%. In December 2017, SCE borrowed $500 million from the credit facility which had an interest rate of 2.46% on December 31, 2017. In January 2018, SCE repaid its $500 million borrowings with cash on hand.
At December 31, 2016,2017, letters of credit issued under SCE's credit facility aggregated $91$99 million and are scheduled to expire in twelve months or less. At December 31, 2015,2016, the outstanding commercial paper, net of discount, was $49$769 million at a weighted-average interest rate of 0.51%0.9%.

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At December 31, 2016,2017, Edison International Parent's outstanding commercial paper, net of discount, was $639 million at a weighted-average interest rate of 1.70%. This commercial paper was supported by the $1.25 billion multi-year revolving credit facility. In December 2017, Edison International borrowed $500 million from the credit facility which had an interest rate of 2.56% on December 31, 2017. In January 2018, Edison International repaid its $500 million borrowings with cash on hand. At December 31, 2016, the outstanding commercial paper, net of discount, was $538 million at a weighted-average interest rate of 0.97%. This commercial paper was supported by the $1.25 billion multi-year revolving credit facility. At December 31, 2015, the outstanding commercial paper, net of discount, was $646 million at a weighted-average interest rate of 0.78%.
Debt Financing Subsequent to December 31, 20162017
In January 2017, SCE2018, Edison International Parent borrowed $300$500 million under a Term Loan Agreement due in January 2019, with a variable interest rate initially set at 1.483%, due in July 2018.based on the London Interbank Offered Rate plus 60 basis points. The proceeds were used for general corporate purposes.
In January 2017, SCE reissued $135 million of 2.625% pollution-control bonds with a mandatory purchase date in December 2023. These bonds mature in November 2033. The proceeds were used for general corporate purposes.to repay Edison International Parent's commercial paper borrowings discussed above.
Note 6.    Derivative Instruments
Derivative financial instruments are used to manage exposure to commodity price risk. These risks are managed in part by entering into forward commodity transactions, including options, swaps and futures. To mitigate credit risk from counterparties in the event of nonperformance, master netting agreements are used whenever possible and counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction.
Commodity Price Risk
Commodity price risk represents the potential impact that can be caused by a change in the market value of a particular commodity. SCE's electricity price exposure arises from energy purchased from and sold to wholesale markets as a result of differences between SCE's load requirements and the amount of energy delivered from its generating facilities and power purchase agreements.PPAs. SCE's natural gas price exposure arises from natural gas purchased for the Mountainview power plant and peaker plants, QF contracts where pricing is based on a monthly natural gas index and power purchase agreementsPPAs in which SCE has agreed to provide the natural gas needed for generation, referred to as tolling arrangements.
Credit and Default Risk
Credit and default risk represent the potential impact that can be caused if a counterparty were to default on its contractual obligations and SCE would be exposed to spot markets for buying replacement power or selling excess power. In addition, SCE would be exposed to the risk of non-payment of accounts receivable, primarily related to the sales of excess power and realized gains on derivative instruments.
Certain power contracts contain master netting agreements or similar agreements, which generally allow counterparties subject to the agreement to setoffoffset amounts when certain criteria are met, such as in the event of default. The objective of netting is to reduce credit exposure. Additionally, to reduce SCE's risk exposures counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction.
Certain power contracts contain a provision that requires SCE to maintain an investment grade rating from each of the major credit rating agencies, referred to as a credit-risk-related contingent feature. If SCE's credit rating were to fall below investment grade, SCE may be required to post additional collateral to cover derivative liabilities and the related outstanding payables. The net fair value of all derivative liabilities with these credit-risk-related contingent features was $12$1 million and $38$12 million as of December 31, 20162017 and 2015,2016, respectively, for which SCE has posted collateral of less than $1 million and $12 million collateral and no collateral to its counterparties at the respective dates for its derivative liabilities and related outstanding payables.

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If the credit-risk-related contingent features underlying these agreements were triggered on December 31, 2016,2017, SCE would be required to post $4$20 million of additional collateral of which $4$19 million is related to outstanding payables that are net of collateral already posted.

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Fair Value of Derivative Instruments
SCE presents its derivative assets and liabilities on a net basis on its consolidated balance sheets when subject to master netting agreements or similar agreements. Derivative positions are offset against margin and cash collateral deposits. In addition, SCE has provided collateral in the form of letters of credit. Collateral requirements can vary depending upon the level of unsecured credit extended by counterparties, changes in market prices relative to contractual commitments and other factors. See Note 4 for a discussion of fair value of derivative instruments. The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:
 December 31, 2016   December 31, 2017  
 Derivative Assets Derivative Liabilities Net Liability Derivative Assets Derivative Liabilities Net Asset
(in millions) Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal  Short-Term Long-Term Subtotal Short-Term Long-Term 
Subtotal2
 
Commodity derivative contractsCommodity derivative contracts            Commodity derivative contracts            
Gross amounts recognized $74
 $1
 $75
 $217
 $941
 $1,158
 $1,083
 $106
 $5
 $111
 $3
 $
 $3
 $108
Gross amounts offset in consolidated balance sheets (1) 
 (1) (1) 
 (1) 
Gross amounts offset in the consolidated balance sheets (1) 
 (1) (1) 
 (1) 
Cash collateral posted1
 
 
 
 
 
 
 
 
 
 
 (1) 
 (1) 1
Net amounts presented in the consolidated balance sheets $73
 $1
 $74
 $216
 $941
 $1,157
 $1,083
 $105
 $5
 $110
 $1
 $
 $1
 $109
 December 31, 2015   December 31, 2016  
 Derivative Assets Derivative Liabilities Net Liability Derivative Assets Derivative Liabilities Net Liability
(in millions) Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal  Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal 
Commodity derivative contractsCommodity derivative contracts            Commodity derivative contracts            
Gross amounts recognized $81
 $84
 $165
 $235
 $1,100
 $1,335
 $1,170
 $74
 $1
 $75
 $217
 $941
 $1,158
 $1,083
Gross amounts offset in consolidated balance sheets (2) 
 (2) (2) 
 (2) 
Gross amounts offset in the consolidated balance sheets (1) 
 (1) (1) 
 (1) 
Cash collateral posted1
 
 
 
 (15) 
 (15) (15) 
 
 
 
 
 
 
Net amounts presented in the consolidated balance sheets $79
 $84
 $163
 $218
 $1,100
 $1,318
 $1,155
 $73
 $1
 $74
 $216
 $941
 $1,157
 $1,083
1 
In addition, at At December 31, 2016,, SCE had received $2 million of cash collateral that is not offset against derivative assets and is reflected in "Other current liabilities" on the consolidated balance sheets. At December 31, 2015, SCE had posted $31 million of cash collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.
2 During the third quarter of 2017, SCE designated certain derivative contracts as normal purchase and normal sale contracts, which resulted in a reclassification of $914 million from derivative liabilities to other liabilities. These liabilities will be amortized over the remaining contract terms.
Income Statement Impact of Derivative Instruments
SCE recognizes realized gains and losses on derivative instruments as purchased power expense and expects that such gains or losses will be part of the purchasepurchased power costs recovered from customers. As a result, realized gains and losses do not affect earnings, but may temporarily affect cash flows. Due to expected future recovery from customers, unrealized gains and losses are recorded as regulatory assets and liabilities and therefore also do not affect earnings. The remaining effects of derivative activities and related regulatory offsets are recordedreported in cash flows from operating activities in the consolidated statements of cash flows.

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The following table summarizes the components of SCE's economic hedging activity:
  Years ended December 31,
(in millions) 2016 2015 2014
Realized losses $(59) $(148) $(57)
Unrealized gains (losses) 84
 (182) (147)

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  Years ended December 31,
(in millions) 2017 2016 2015
Realized losses $(14) $(59) $(148)
Unrealized gains (losses) 106
 84
 (182)
Notional Volumes of Derivative Instruments
The following table summarizes the notional volumes of derivatives used for SCE hedging activities:
 Economic Hedges Economic Hedges
Unit ofDecember 31,Unit ofDecember 31,
CommodityMeasure2016 2015Measure2017 2016
Electricity options, swaps and forwardsGWh1,816
 6,221GWh475
 1,816
Natural gas options, swaps and forwardsBcf36
 32Bcf143
 36
Congestion revenue rightsGWh93,319
 109,740GWh78,765
 93,319
Tolling arrangementsGWh61,093
 70,663GWh
 61,093
Note 7.    Income Taxes
Current and Deferred Taxes
Edison International's sources of income (loss) before income taxes are:
 Years ended December 31, Years ended December 31,
(in millions) 2016 2015 2014 2017 2016 2015
Income from continuing operations before income taxes $1,590
 $1,568
 $1,979
 $949
 $1,590
 $1,568
Income (loss) from discontinued operations before income taxes 1
 15
 (525)
Income from discontinued operations before income taxes 
 1
 15
Income before income tax $1,591
 $1,583
 $1,454
 $949
 $1,591
 $1,583
The components of income tax expense (benefit) by location of taxing jurisdiction are:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Current:                      
Federal$(46) $18
 $(99) $75
 $72
 $(89)$(221) $(46) $18
 $(253) $75
 $72
State33
 19
 20
 93
 127
 101
4
 33
 19
 (81) 93
 127
(13) 37
 (79) 168
 199
 12
(217) (13) 37
 (334) 168
 199
Deferred:                      
Federal176
 340
 454
 112
 298
 476
570
 176
 340
 265
 112
 298
State14
 109
 68
 (24) 10
 (14)(72) 14
 109
 39
 (24) 10
190
 449
 522
 88
 308
 462
498
 190
 449
 304
 88
 308
Total continuing operations177
 486
 443
 256
 507
 474
281
 177
 486
 (30) 256
 507
Discontinued operations1
(11) (21) (710) 
 
 
Discontinued operations
 (11) (21) 
 
 
Total$166
 $465
 $(267) $256
 $507
 $474
$281
 $166
 $465
 $(30) $256
 $507
1


See Note 15 for a discussion of discontinued operations related to EME.

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The components of net accumulated deferred income tax liability are:
Edison International SCEEdison International SCE
December 31,December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Deferred tax assets:              
Property and software related$549
 $675
 $548
 $675
$358
 $549
 $357
 $548
Nuclear decommissioning trust assets in excess of nuclear ARO liability348
 360
 348
 360
404
 348
 404
 348
Loss and credit carryforwards1,418
 1,388
 
 
Regulatory balancing accounts15
 21
 15
 21
Pension and PBOPs300
 337
 93
 154
Loss and credit carryforwards1
1,346
 1,418
 150
 
Regulatory asset2
812
 15
 812
 15
Pension and postretirement benefits other than pensions214
 300
 86
 93
Other419
 499
 408
 411
277
 419
 236
 408
Sub-total3,049
 3,280
 1,412
 1,621
3,411
 3,049
 2,045
 1,412
Less valuation allowance24
 32
 
 
28
 24
 
 
Total3,025
 3,248
 1,412
 1,621
3,383
 3,025
 2,045
 1,412
Deferred tax liabilities:              
Property-related10,330
 9,606
 10,330
 9,600
6,970
 10,330
 6,962
 10,330
Capitalized software costs237
 207
 237
 207
160
 237
 160
 237
Regulatory balancing accounts134
 202
 134
 202
Regulatory liability158
 134
 158
 134
Nuclear decommissioning trust assets348
 360
 348
 360
404
 348
 404
 348
PBOPs13
 71
 13
 71
Postretirement benefits other than pensions36
 13
 36
 13
Other202
 189
 148
 161
140
 202
 133
 148
Total11,264
 10,635
 11,210
 10,601
7,868
 11,264
 7,853
 11,210
Accumulated deferred income tax liability, net1
$8,239
 $7,387
 $9,798
 $8,980
Accumulated deferred income tax liability, net3
$4,485
 $8,239
 $5,808
 $9,798
1  
As of December 31, 2017, Edison International has recorded a valuation allowance of $28 million for non-California state net operating loss carryforwards estimated to expire unused. In addition, as of December 31, 2017, deferred tax assets for net operating loss and tax credit carryforwards are reduced by unrecognized tax benefits of $77 million and $75 million for Edison International and SCE, respectively.
2 Includes an $809 million deferred tax asset, related to certain regulatory liabilities established as part of Tax Reform discussed below.
3
Included in deferred income taxes and credits.credits on the consolidated balance sheets.
On December 22, 2017, Tax Reform was signed into law. This comprehensive reform of tax law reduces the federal corporate income tax rate from 35% to 21% and is generally effective beginning January 1, 2018. US GAAP requires deferred tax assets and liabilities to be measured at the enacted tax rate expected to apply when temporary differences are to be realized or settled. At the date of enactment, Edison International and SCE's deferred taxes were re-measured based upon the new tax rate. Accumulated deferred income tax liabilities, net, were reduced by $4.5 billion and $5.0 billion at Edison International and SCE, respectively. Edison International recorded income tax expense of $466 million at December 31, 2017, primarily related to the re-measurement of the federal net operating loss carryforwards (see below for more information). SCE's re-measurement of deferred taxes was recorded against regulatory assets and liabilities when the pre-tax amounts giving rise to the deferred taxes were created through ratemaking activities. SCE also had shareholder-funded pre-tax amounts that gave rise to the deferred tax assets resulting in income tax expense of $33 million.
For property acquired and placed in service by regulated utilities after September 27, 2017, Tax Reform repeals 50% bonus depreciation. As a result, SCE is required to evaluate the contractual terms of its fourth quarter 2017 capital additions to determine whether they still qualify for the prior tax law's 50% bonus depreciation, as compared to no bonus depreciation pursuant to Tax Reform. As of December 31, 2017, SCE has not completed this analysis, but recorded a reasonable estimate of the effects of these changes. SCE expects to complete this analysis during 2018.

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Net Operating Loss and Tax Credit Carryforwards
The amounts of net operating loss and tax credit carryforwards (after-tax) are as follows:
Edison International SCEEdison International SCE
December 31, 2016December 31, 2017
(in millions)Loss Carryforwards Credit Carryforwards Loss Carryforwards Credit CarryforwardsLoss Carryforwards Credit Carryforwards Loss Carryforwards Credit Carryforwards
Expire between 2017 to 2035$1,095
 $430
 $20
 $25
Expire between 2018 to 2036$901
 $451
 $162
 $25
No expiration date
 69
 
 37

 71
 
 38
Total1
$1,095
 $499
 $20
 $62
$901
 $522
 $162
 $63
1
Deferred tax assets for net operating loss and tax credit carryforwards are reduced by unrecognized tax benefits of $176 million and $82 million for Edison International and SCE, respectively.
Edison International has recordedAs a valuation allowanceresult of $24 million for state net operating loss carryforwards estimated to expire unused. In 2016, Edison International determined that $8 million of the assets subject to a valuation allowance, had no expectation of recovery and were written off.
At December 31, 2015,Tax Reform, Edison International and SCE had $42 million and $6 million, respectively, ofSCE's federal net operating losslosses were re-measured at 21%. The reduction in the federal corporate income tax rate does not change the gross dollar value of taxable income that may be offset by NOLs, however that taxable income will only be taxable at 21% in future periods, thus reducing the value of NOLs utilized after 2017. Tax Reform did not impact the valuation of tax credit carryforwards, related to the tax benefit on employee stock plans that would be recorded to additional paid-in capital when realized. In March 2016, the FASB issued an accounting standards update to simplify the accounting for share-based payments. As part of this new guidance adopted in 2016, Edison International and SCE recorded an increase to beginning retained earnings for these amounts. Refer to Note 1 for further information.which directly offset taxes due.
Edison International consolidates for federal income tax purposes, but not for financial accounting purposes, a group of wind projects referred to as Capistrano Wind. TheAs a result of Tax Reform, the amount of net operating loss and tax credit carryforwards recognized as part of deferred income taxes includes $242was re-measured ($199 million and $210$242 million related to Capistrano Wind at December 31, 2017 and 2016, and 2015,

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respectively.respectively). Under a tax allocation agreement, Edison International has recorded thea corresponding liability, which was also re-measured, as part of other long-term liabilities related to its obligation to make payments to Capistrano Wind of these tax benefits when realized.
Effective Tax Rate
The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Income from continuing operations before income taxes$1,590
 $1,568
 $1,979
 $1,755
 $1,618
 $2,039
$949
 $1,590
 $1,568
 $1,106
 $1,755
 $1,618
Provision for income tax at federal statutory rate of 35%556
 549
 693
 614
 566
 714
332
 556
 549
 387
 614
 566
Increase in income tax from: 
  
  
  
  
   
  
  
  
  
  
Items presented with related state income tax, net: 
  
  
  
  
   
  
  
  
  
  
Regulatory asset write-off1

 382
 
 
 382
 

 
 382
 
 
 382
State tax, net of federal benefit29
 5
 56
 43
 34
 55
2
 29
 5
 8
 43
 34
Property-related2
(362) (341) (252) (362) (341) (252)(439) (362) (341) (439) (362) (341)
Change related to uncertain tax positions(4) (67) 5
 (8) (94) 12
(18) (4) (67) (13) (8) (94)
San Onofre OII settlement
 
 (23) 
 
 (23)
Share-based compensation3
(28) 
 
 (13) 
 
Revised San Onofre Settlement Agreement3
25
 
 
 25
 
 
Share-based compensation4
(55) (28) 
 (11) (13) 
Deferred tax re-measurement5
466
 
 
 33
 
 
Other(14) (42) (36) (18) (40) (32)(32) (14) (42) (20) (18) (40)
Total income tax expense from continuing operations$177
 $486
 $443
 $256
 $507
 $474
Total income tax expense (income)from continuing operations$281
 $177
 $486
 $(30) $256
 $507
Effective tax rate11.1% 31.0% 22.4% 14.6% 31.3% 23.2%29.6% 11.1% 31.0% (2.7)% 14.6% 31.3%
1 Includes federal and state.
2 
Includes incremental repair benefits. See discussion of repair deductions below. In addition, during 2017, SCE recorded $80 million ($135 million pre-tax) of tax benefits related to tax accounting method changes resulting from the filing of SCE's 2016 tax returns.

77




3Includes the write-off of an unrecovered tax regulatory asset related to the Revised San Onofre Settlement Agreement. See Note 11 for further information.
34 
Includes state taxes of $(11) million and $(2) million for Edison International and SCE, respectively, for the year ended December 31, 2017.Includes state taxes of $(4) million and $(1) million for Edison International and SCE, respectively.respectively, for the year ended December 31, 2016. Refer to Note 1 for further information.
5
In 2017, Edison International and SCE recorded a charge to earnings related to the re-measurement of deferred taxes resulting from Tax Reform. See further discussion above.
The CPUC requires flow-through ratemaking treatment for the current tax benefit arising from certain property-related and other temporary differences which reverse over time. Flow-through items reduce current authorized revenue requirements in SCE's rate cases and result in a regulatory asset for recovery of deferred income taxes in future periods. The difference between the authorized amounts as determined in SCE's rate cases, adjusted for balancing and memorandum account activities, and the recorded flow-through items also result in increases or decreases in regulatory assets with a corresponding impact on the effective tax rate to the extent that recorded deferred amounts are expected to be recovered in future rates. For further information, see Note 10.
Repair Deductions
Edison International made voluntary elections in 2009 and 2011 to change its tax accounting method for certain tax repair costs incurred on SCE's transmission, distribution and generation assets. Incremental repair deductions represent amounts recognized for regulatory accounting purposes in excess of amounts included in the authorized revenue requirements through the GRCgeneral rate case ("GRC") proceedings. Incremental repair deductions for the years 2012 – 2014 resulted in additional income tax benefits of $133 million in 2014.
As part of the final decision in SCE's 2015 GRC, the CPUC adopted a rate base offset associated with thesethe incremental tax repair deductions during 2012 – 2014. The 2015 rate base offset is $324 million and amortizes on a straight line basis over 27 years. As a result of the rate base offset included in the final decision, SCE recorded an after tax charge of $382 million in 2015 to write down the net regulatory asset for recovery of deferred income taxes related to 2012 – 2014 incremental tax repair deductions which is reflected in "Income tax expense" on the consolidated statements of income. The amount of tax repair deductions the CPUC used to establish the rate base offset was based on SCE's forecast of 2012 – 2014 tax repair deductions from the Notice of Intent filed in the 2015 GRC. The amount of tax repair deductions included in the Notice of Intent was less than the actual tax repair deductions SCE reported on its 2012 through 2014 income tax returns. In April 2016,

71




the CPUC granted SCE's request to reduce SCE's BRRBAbase revenue requirement balancing account ("BRRBA") by $234 million in future periods subject to the timing and final outcome of audits that may be conducted by tax authorities. The refunds will resultresulted in flowing incremental tax benefits for 2012 – 2014 to customers. SCE refunded $133 million ($79 million after-tax) during the second quarter of 2016. SCE did not record a gain or loss from this reduction. Regulatory assets recorded from flow through tax benefits are recovered through SCE's general rate caseGRC proceedings.
Accounting for Uncertainty in Income Taxes
Authoritative guidance related to accounting for uncertainty in income taxes requires an enterprise to recognize, in its financial statements, the best estimate of the impact of a tax position by determining if the weight of the available evidence indicates it is more likely than not, based solely on the technical merits, that the position will be sustained upon examination. The guidance requires the disclosure of all unrecognized tax benefits, which includes both the reserves recorded for tax positions on filed tax returns and the unrecognized portion of affirmative claims.

78




Unrecognized Tax Benefits
The following table provides a reconciliation of unrecognized tax benefits for continuing and discontinued operations:
Edison International SCEEdison International SCE
December 31,December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Balance at January 1,$529
 $576
 $815
 $353
 $441
 $532
$471
 $529
 $576
 $371
 $353
 $441
Tax positions taken during the current year:                      
Increases36
 54
 65
 36
 48
 57
51
 36
 54
 51
 36
 48
Tax positions taken during a prior year:                      
Increases2
 66
 1
 
 23
 

 2
 66
 
 
 23
Decreases1
(96) (165) (143) (18) (159) (93)(7) (96) (165) (13) (18) (159)
Decreases for settlements during the period2

 (2) (162) 
 
 (55)(83) 
 (2) (78) 
 
Balance at December 31,$471
 $529
 $576
 $371
 $353
 $441
$432
 $471
 $529
 $331
 $371
 $353
1
Decreases in prior year tax positions for 2016 relate to state tax receivables on various claims. Due to the tax risks associated with these claims, the tax benefits were fully reserved at the time the asset was recorded. During 2016, the Company has determined that it will not recognize these assets so the tax benefit and related tax reserve were written off. Decreases in tax positions for 2015 relate primarily to re-measurement of uncertain tax positions in connection with receipt of the IRSInternal Revenue Service ("IRS") Revenue Agent Report in June 2015. See discussions in Tax Disputes below.
2
In the fourthfirst quarter of 2014,2017, Edison International has settled all open tax positions with the IRS for taxable years 20032007 through 2006.2012.
As of December 31, 20162017 and 2015,2016, if recognized, $347$308 million and $440$347 million, respectively, of the unrecognized tax benefits would impact Edison International's effective tax rate; and $243$167 million and $256$243 million, respectively, of the unrecognized tax benefits would impact SCE's effective tax rate.
Tax Disputes
Tax Years 2007 – 2012
In the first quarter of 2017, Edison International has reached a tentative settlement agreementresolved all open tax positions with the IRS for taxable years 2007 through 2012. Edison International has previously made cash deposits to cover the 2007 2012estimated tax years. The final agreement, when approved, is not expected to haveand interest liability from this audit cycle and expects a material impact on the financial statements.
During 2015, the Company received the IRS Revenue Agent Report for the 2010 2012 tax years. Edison International's and SCE's tax reserves were re-measured at that time and $94$7 million and $100 million, respectively,refund of income tax benefits were recorded in the comparable quarter for the prior year.this deposited amount.
Tax years that remain open for examination by the IRS and the California Franchise Tax Board are 2014 – 2016 and 2010 – 2016 respectively. Edison International has settled all open tax position with the IRS for taxable years prior to 2013.
Tax years 1994 – 2006 are currently in settlement negotiations with the California Franchise Tax Board. While we expect to resolve these tax years within the next twelve months, the impacts cannot be reasonably estimated until further progress has been made. Tax years 2007 – 2015 and 2003 – 2015, respectively.2009 are currently under protest with the California Franchise Tax Board.

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Accrued Interest and Penalties
The total amount of accrued interest and penalties related to income tax liabilities for continuing and discontinued operations are:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Accrued interest and penalties$128
 $122
 $41
 $40
$115
 $128
 $41
 $41
The net after-tax interest and penalties recognized in income tax expense for continuing and discontinued operations are:
Edison International SCEEdison International SCE
December 31,December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Net after-tax interest and penalties tax benefit$6
 $9
 $41
 $2
 $14
 $16
Net after-tax interest and penalties tax expense (benefit)$6
 $6
 $(9) $4
 $2
 $(14)
Note 8.    Compensation and Benefit Plans
Employee Savings Plan
The 401(k) defined contribution savings plan is designed to supplement employees' retirement income. The following employer contributions were made for continuing operations:
Edison International SCEEdison International SCE
(in millions)Years ended December 31,Years ended December 31,
2017$70
 $69
2016$69
 $68
69
 68
201573
 72
73
 72
201471
 70
Pension Plans and Postretirement Benefits Other Than Pensions
Pension Plans
Noncontributory defined benefit pension plans (some with cash balance features) cover most employees meeting minimum service requirements. SCE recognizes pension expense for its nonexecutive plan as calculated by the actuarial method used for ratemaking. The expected contributions (all by the employer) for Edison International and SCE are approximately $136$66 million and $85$50 million, respectively, for the year ending December 31, 2017.2018. Annual contributions made by SCE to most of SCE's pension plans are anticipated to be recovered through CPUC-approved regulatory mechanisms.
The funded position of Edison International's pension is sensitive to changes in market conditions. Changes in overall interest rate levels significantly affect the company's liabilities, while assets held in the various trusts established to fund Edison International's pension are affected by movements in the equity and bond markets. Due to SCE's regulatory recovery treatment, a regulatory asset has been recorded equal to the unfunded status (See Note 10).

7380




Information on pension plan assets and benefit obligations for continuing and discontinued operations is shown below.
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Change in projected benefit obligation              
Projected benefit obligation at beginning of year$4,374
 $4,517
 $3,878
 $3,999
$4,284
 $4,374
 $3,791
 $3,878
Service cost139
 142
 132
 133
137
 139
 129
 132
Interest cost171
 170
 150
 150
164
 171
 144
 150
Actuarial gain(125) (149) (140) (143)(46) (125) (74) (140)
Benefits paid(275) (305) (229) (261)(360) (275) (288) (229)
Other
 (1) 
 
Projected benefit obligation at end of year$4,284
 $4,374
 $3,791
 $3,878
$4,179
 $4,284
 $3,702
 $3,791
Change in plan assets              
Fair value of plan assets at beginning of year$3,298
 $3,454
 $3,080
 $3,217
$3,388
 $3,298
 $3,172
 $3,080
Actual return on plan assets262
 30
 239
 27
483
 262
 442
 239
Employer contributions103
 119
 82
 97
105
 103
 64
 82
Benefits paid(275) (305) (229) (261)(360) (275) (288) (229)
Fair value of plan assets at end of year$3,388
 $3,298
 $3,172
 $3,080
$3,616
 $3,388
 $3,390
 $3,172
Funded status at end of year$(896) $(1,076) $(619) $(798)$(563) $(896) $(312) $(619)
Amounts recognized in the consolidated balance sheets consist of 1:
              
Long-term assets$2
 $
 $
 $
$7
 $2
 $
 $
Current liabilities(50) (27) (4) (4)(17) (50) (4) (4)
Long-term liabilities(848) (1,049) (615) (794)(553) (848) (308) (615)
$(896) $(1,076) $(619) $(798)$(563) $(896) $(312) $(619)
Amounts recognized in accumulated other comprehensive loss consist of:              
Prior service cost$(1) $
 $
 $
$(1) $(1) $
 $
Net loss1
93
 96
 24
 27
77
 93
 21
 24
$92
 $96
 $24
 $27
$76
 $92
 $21
 $24
Amounts recognized as a regulatory asset$574
 $675
 $574
 $675
$271
 $574
 $271
 $574
Total not yet recognized as expense$666
 $771
 $598
 $702
$347
 $666
 $292
 $598
Accumulated benefit obligation at end of year$4,138
 $4,200
 $3,683
 $3,744
$4,022
 $4,138
 $3,585
 $3,683
Pension plans with an accumulated benefit obligation in excess of plan assets:              
Projected benefit obligation$4,284
 $4,374
 $3,791
 $3,878
$4,179
 $4,284
 $3,702
 $3,791
Accumulated benefit obligation4,138
 4,200
 3,683
 3,744
4,022
 4,138
 3,585
 3,683
Fair value of plan assets3,388
 3,298
 3,172
 3,080
3,616
 3,388
 3,390
 3,172
Weighted-average assumptions used to determine obligations at end of year:              
Discount rate3.94% 4.18% 3.94% 4.18%3.46% 3.94% 3.46% 3.94%
Rate of compensation increase4.00% 4.00% 4.00% 4.00%4.10% 4.00% 4.10% 4.00%
1 
The SCE liability excludes a long-term payable due to Edison International Parent of $124$114 million and $123$124 million at December 31, 20162017 and 2015,2016, respectively, related to certain SCE postretirement benefit obligations transferred to Edison International Parent. SCE's accumulated other comprehensive loss of $24$21 million and $27$24 million at December 31, 20162017 and 2015,2016, respectively, excludes net loss of $20$19 million and $18$20 million related to these benefits.

7481




PensionNet periodic pension expense components for continuing operations are:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Service cost$139
 $142
 $133
 $136
 $139
 $128
$138
 $139
 $142
 $133
 $136
 $139
Interest cost172
 170
 181
 156
 155
 164
164
 172
 170
 149
 156
 155
Expected return on plan assets(220) (233) (229) (205) (217) (213)(212) (220) (233) (199) (205) (217)
Settlement costs1

 
 45
 
 
 42
6
 
 
 
 
 
Curtailment gain
 
 (4) 
 
 
Amortization of prior service cost4
 5
 5
 4
 5
 5
3
 4
 5
 3
 4
 5
Amortization of net loss2
27
 40
 12
 23
 35
 7
21
 27
 40
 17
 23
 35
Expense under accounting standards122
 124
 143
 114
 117
 133
120
 122
 124
 103
 114
 117
Regulatory adjustment (deferred)(21) (6) 8
 (21) (6) 8
(28) (21) (6) (28) (21) (6)
Total expense recognized$101
 $118
 $151
 $93
 $111
 $141
$92
 $101
 $118
 $75
 $93
 $111
1 
Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified forUnder GAAP, a settlement is recorded when lump-sum payments exceed estimated annual service and interest costs. Lump sum payments made in 2017 to Edison International executives retiring in 2016 from the Executive Retirement Plan exceeded the estimated service and interest costs, resulting in a partial settlement of that plan. A settlement loss of approximately $6.4 million ($3.8 million after-tax) was zero for the both the years ended December 31, 2016 and 2015 and $3 millionrecorded at Edison International for the year ended December 31, 2014.2017.
2 
Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $10 million, $10 million and $6$14 million respectively, for the yearyears ended December 31, 2016.2017, 2016 and 2015, respectively. The amount reclassified for Edison International and SCE was $14$6 million, $6 million and $8 million, respectively, for the yearyears ended December 31, 2015. The amount reclassified for Edison International2017, 2016 and SCE was $9 million and $4 million, respectively, for the year ended December 31, 2014.2015, respectively.
Under GAAP, a settlement is recorded when lump-sum payments exceed estimated annual service and interest costs. Lump-sum payments to employees retiring in 2014 from the SCE Retirement Plan (primarily due to workforce reductions described below) exceeded the estimated service and interest costs for that year. A settlement requires re-measurement of both the plan pension obligations and plan assets as of the date of the settlement. Re-measurement assumption changes result in actuarial gains and losses which are combined with previous unrecognized gains and losses. After re-measurement, GAAP requires an acceleration of a portion of unrecognized net losses attributable to such lump-sum payments as additional pension expense as reflected in the above table. The additional pension expense related to SCE did not impact net income as such amounts are probable of recovery through future rates.
Other changes in pension plan assets and benefit obligations recognized in other comprehensive loss for continuing operations:
 Edison International SCE
 Years ended December 31,
(in millions)2016 2015 2014 2016 2015 2014
Net loss (gain)$6
 $7
 $85
 $4
 $(9) $37
Amortization of net loss and other(10) (15) (13) (6) (9) (4)
Total recognized in other comprehensive loss$(4) $(8) $72
 $(2) $(18) $33
Total recognized in expense and other comprehensive loss$97
 $110
 $223
 $91
 $93
 $174

75




 Edison International SCE
 Years ended December 31,
(in millions)2017 2016 2015 2017 2016 2015
Net loss (gain)$
 $6
 $7
 $3
 $4
 $(9)
Settlement charges(6) 
 
 
 
 
Amortization of net loss(10) (10) (15) (6) (6) (9)
Total recognized in other comprehensive loss$(16) $(4) $(8) $(3) $(2) $(18)
Total recognized in expense and other comprehensive loss$76
 $97
 $110
 $72
 $91
 $93
In accordance with authoritative guidance on rate-regulated enterprises, SCE records regulatory assets and liabilities instead of charges and credits to other comprehensive income (loss) for the portion of SCE's postretirement benefit plans that are recoverable in utility rates.
The estimated pension amounts that will be amortized to expense in 20172018 for continuing operations are as follows:
(in millions)Edison International SCEEdison International SCE
Unrecognized net loss to be amortized1
$19
 $15
$8
 $6
Unrecognized prior service cost to be amortized3
 3
3
 3
1 
The amount of net loss expected to be reclassified from other comprehensive loss for Edison International's continuing operations and SCE is $10$8 million and $6 million, respectively.

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Edison International and SCE used the following weighted-average assumptions to determine pension expense for continuing operations:
Years ended December 31,Years ended December 31,
2016 2015 20142017 2016 2015
Discount rate4.18% 3.85% 4.50%3.94% 4.18% 3.85%
Rate of compensation increase4.00% 4.00% 4.00%4.00% 4.00% 4.00%
Expected long-term return on plan assets7.00% 7.00% 7.00%6.50% 7.00% 7.00%
The following benefit payments, which reflect expected future service, are expected to be paid:
Edison International SCEEdison International SCE
(in millions)Years ended December 31,Years ended December 31,
2017$346
 $271
2018332
 298
$338
 $304
2019344
 300
343
 303
2020341
 304
327
 293
2021341
 304
324
 287
2022 2026
1,566
 1,396
2022309
 281
2023 2027
1,453
 1,299
Postretirement Benefits Other Than Pensions ("PBOP(s)")
Most employeesEmployees hired prior to December 31, 2017 who are retiring at or after age 55 with at least 10 years of service may be eligible for postretirement medical, dental, vision and life insurancevision benefits. Eligibility for a company contribution toward the cost of these benefits in retirement depends on a number of factors, including the employee's years of service, age, hire date, and retirement date. Under the terms of the Edison International Health and Welfare Benefit Plan ("PBOP Plan"), each participating employer (Edison International or its participating subsidiaries) is responsible for the costs and expenses of all PBOP Plan benefits with respect to its employees and former employees. A participating employer may terminate the PBOP Plan benefits with respect to its employees and former employees, as may SCE (as PBOP Plan sponsor), and, accordingly, the participants' PBOP Plan benefits are not vested benefits.
The expected contributions (substantially all of which are expected to be made by SCE) for PBOP benefits are $21$12 million for the year ended December 31, 2017.2018. Annual contributions related to SCE employees made to SCE plans are anticipated to be recovered through CPUC-approved regulatory mechanisms and are expected to be, at a minimum, equal to the total annual expense for these plans.
SCE has established three voluntary employee beneficiary associations trusts ("VEBA Trusts") that can only be used to pay for retiree health care benefits of SCE. Once funded into the VEBA Trusts, neither SCE nor Edison International can subsequently terminate benefits and recover remaining amounts in the VEBA Trusts. Participants of the PBOP Plan do not have a beneficial interest in the VEBA Trusts. The VEBA Trust assets are sensitive to changes in market conditions. Changes in overall interest rate levels significantly affect the company's liabilities, while assets held in the various trusts established to

76




fund Edison International's other postretirement benefits are affected by movements in the equity and bond markets. Due to SCE's regulatory recovery treatment, the unfunded status is offset by a regulatory asset.

83




Information on PBOP Plan assets and benefit obligations is shown below:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Change in benefit obligation              
Benefit obligation at beginning of year$2,350
 $2,784
 $2,341
 $2,775
$2,276
 $2,350
 $2,266
 $2,341
Service cost35
 46
 34
 46
31
 35
 31
 34
Interest cost97
 102
 97
 102
86
 97
 85
 97
Special termination benefits2
 (2) 2
 (2)1
 2
 1
 2
Plan Amendments(6) 
 (6) 

 (6) 
 (6)
Actuarial gain(110) (500) (110) (500)
Actuarial loss (gain)24
 (110) 23
 (110)
Plan participants' contributions19
 20
 19
 20
24
 19
 24
 19
Benefits paid(111) (100) (111) (100)(105) (111) (105) (111)
Benefit obligation at end of year$2,276
 $2,350
 $2,266
 $2,341
$2,337
 $2,276
 $2,325
 $2,266
Change in plan assets              
Fair value of plan assets at beginning of year$2,036
 $2,086
 $2,036
 $2,086
$2,102
 $2,036
 $2,102
 $2,036
Actual return on assets137
 6
 137
 6
297
 137
 297
 137
Employer contributions21
 24
 21
 24
12
 21
 12
 21
Plan participants' contributions19
 20
 19
 20
24
 19
 24
 19
Benefits paid(111) (100) (111) (100)(105) (111) (105) (111)
Fair value of plan assets at end of year$2,102
 $2,036
 $2,102
 $2,036
$2,330
 $2,102
 $2,330
 $2,102
Funded status at end of year$(174) $(314) $(164) $(305)$(7) $(174) $5
 $(164)
Amounts recognized in the consolidated balance sheets consist of:              
Long-term assets$6
 $
 $17
 $
Current liabilities$(14) $(15) $(13) $(15)(13) (14) (12) (13)
Long-term liabilities(160) (299) (151) (290)
 (160) 
 (151)
$(174) $(314) $(164) $(305)$(7) $(174) $5
 $(164)
Amounts recognized in accumulated other comprehensive loss consist of:              
Net loss$4
 $4
 $
 $
$4
 $4
 $
 $
Amounts recognized as a regulatory asset$136
 $174
 $136
 $174
Total not yet recognized as expense$140
 $178
 $136
 $174
Amounts recognized as a regulatory (liability) asset(26) 136
 (26) 136
Total not yet recognized as (income) expense$(22) $140
 $(26) $136
Weighted-average assumptions used to determine obligations at end of year:              
Discount rate4.29% 4.55% 4.29% 4.55%3.70% 4.29% 3.70% 4.29%
Assumed health care cost trend rates:              
Rate assumed for following year7.00% 7.50% 7.00% 7.50%6.75% 7.00% 6.75% 7.00%
Ultimate rate5.00% 5.00% 5.00% 5.00%5.00% 5.00% 5.00% 5.00%
Year ultimate rate reached2022
 2022
 2022
 2022
2029
 2022
 2029
 2022
During 2016 and 2015, the PBOP plan had actuarial gains of $110 million and $500 million, respectively. The 2016 actuarial gain is primarily related to $165 million in experience gain, offsetting by $95 million loss from a decrease in the discount rate (from 4.55% as of December 31, 2015 to 4.29% as of December 31, 2016), and the adoption of new mortality tables, as discussed below. The 2015 actuarial gain is primarily related to $300 million in experience gains, $140 million of income from an increase in the discount rate (from 4.16% at December 31, 2014 to 4.55% as of December 31, 2015) due to higher interest rates, and the adoption of new mortality tables, as discussed below.

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In 2016 and 2015, Edison International and SCE adopted new mortality tables that the Society of Actuaries released in October each year that reflect changes in life expectancy. At December 31, 2016 and 2015, this adoption resulted in a change in Edison International's PBOP plans' accumulated postretirement benefit obligation of $(40) million and $(62) million, respectively, including $(40) million and $(61) million, respectively, for SCE.
Net periodic PBOP expense components for continuing operations are:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Service cost$35
 $46
 $40
 $34
 $46
 $40
$31
 $35
 $46
 $31
 $34
 $46
Interest cost97
 102
 117
 97
 102
 117
86
 97
 102
 85
 97
 102
Expected return on plan assets(112) (116) (108) (112) (116) (108)(110) (112) (116) (110) (112) (116)
Special termination benefits1
2
 1
 3
 2
 1
 3
1
 2
 1
 1
 2
 1
Amortization of prior service credit(2) (12) (36) (2) (12) (35)(3) (2) (12) (2) (2) (12)
Amortization of net loss
 3
 6
 
 2
 5

 
 3
 
 
 2
Total expense$20
 $24
 $22
 $19
 $23
 $22
$5
 $20
 $24
 $5
 $19
 $23
1 
Due to the reduction in workforce, SCE has incurred costs for extended retiree health care coverage.
In accordance with authoritative guidance on rate-regulated enterprises, SCE records regulatory assets and liabilities instead of charges and credits to other comprehensive income (loss) for the portion of SCE's postretirement benefit plans that are recoverable in utility rates. The estimated PBOP amounts that will be amortized to expense in 20172018 for continuing operations are as follows:
    Edison International SCE
Unrecognized prior service credit to be amortized$(2) $(2)
(in millions)Edison International SCE
Unrecognized prior service credit to be amortized$(1) $(1)
Edison International and SCE used the following weighted-average assumptions to determine PBOP expense for continuing operations:
Years ended December 31,Years ended December 31,
2016 2015 20142017 2016 2015
Discount rate4.55% 4.16% 5.00%4.29% 4.55% 4.16%
Expected long-term return on plan assets5.60% 5.50% 5.50%5.30% 5.60% 5.50%
Assumed health care cost trend rates:          
Current year7.50% 7.75% 7.75%7.00% 7.50% 7.75%
Ultimate rate5.00% 5.00% 5.00%5.00% 5.00% 5.00%
Year ultimate rate reached2022
 2021
 2020
2022
 2022
 2021
A one-percentage-point change in assumed health care cost trend rate would have the following effects on continuing operations:
Edison International SCEEdison International SCE
(in millions)One-Percentage-Point Increase One-Percentage-Point Decrease One-Percentage-Point Increase One-Percentage-Point DecreaseOne-Percentage-Point Increase One-Percentage-Point Decrease One-Percentage-Point Increase One-Percentage-Point Decrease
Effect on accumulated benefit obligation as of December 31, 2016$244
 $(200) $243
 $(199)
Effect on accumulated benefit obligation as of December 31, 2017$247
 $(203) $246
 $(202)
Effect on annual aggregate service and interest costs11
 (9) 11
 (9)9
 (8) 9
 (8)

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The following benefit payments are expected to be paid:
Edison International SCEEdison International SCE
(in millions)Years ended December 31,Years ended December 31,
2017$98
 $98
2018102
 102
$93
 $93
2019105
 105
96
 96
2020109
 109
100
 100
2021113
 112
103
 103
2022 – 2026612
 609
2022107
 106
2023 – 2027582
 580
Plan Assets
Description of Pension and Postretirement Benefits Other than Pensions Investment Strategies
The investment of plan assets is overseen by a fiduciary investment committee. Plan assets are invested using a combination of asset classes, and may have active and passive investment strategies within asset classes. Target allocations for 20162017 pension plan assets were 29% for U.S. equities, 17% for non-U.S. equities, 35% for fixed income, 15% for opportunistic and/or alternative investments and 4% for other investments. Target allocations for 20162017 PBOP plan assets (except for Represented VEBA which is 85% for fixed income, 10%5% for opportunistic/private equities, and 5%10% global equities) are 41%58% for U.S.global equities, 17% for non-U.S. equities, 34%29% for fixed income, 7%and 13% for opportunistic and/or alternative investments, and 1% for other investments. Edison International employs multiple investment management firms. Investment managers within each asset class cover a range of investment styles and approaches. Risk is managed through diversification among multiple asset classes, managers, styles and securities. Plan asset classes and individual manager performances are measured against targets. Edison International also monitors the stability of its investment managers' organizations.
Allowable investment types include:
United States Equities: Common and preferred stocks of large, medium, and small companies which are predominantly United States-based.
Non-United States Equities: Equity securities issued by companies domiciled outside the United States and in depository receipts which represent ownership of securities of non-United States companies.
Fixed Income: Fixed income securities issued or guaranteed by the United States government, non-United States governments, government agencies and instrumentalities including municipal bonds, mortgage backed securities and corporate debt obligations. A portion of the fixed income positions may be held in debt securities that are below investment grade.
Opportunistic, Alternative and Other Investments:
Opportunistic: Investments in short to intermediate term market opportunities. Investments may have fixed income and/or equity characteristics and may be either liquid or illiquid.
Alternative: Limited partnerships that invest in non-publicly traded entities.
Other: Investments diversified among multiple asset classes such as global equity, fixed income currency and commodities markets. Investments are made in liquid instruments within and across markets. The investment returns are expected to approximate the plans' expected investment returns.
Asset class portfolio weights are permitted to range within plus or minus 3%. Where approved by the fiduciary investment committee, futures contracts are used for portfolio rebalancing and to reallocate portfolio cash positions. Where authorized, a few of the plans' investment managers employ limited use of derivatives, including futures contracts, options, options on futures and interest rate swaps in place of direct investment in securities to gain efficient exposure to markets. Derivatives are not used to leverage the plans or any portfolios.

7986




Determination of the Expected Long-Term Rate of Return on Assets
The overall expected long-term rate of return on assets assumption is based on the long-term target asset allocation for plan assets and capital markets return forecasts for asset classes employed. A portion of the PBOP trust asset returns are subject to taxation, so the expected long-term rate of return for these assets is determined on an after-tax basis.
Capital Markets Return Forecasts
SCE's capital markets return forecast methodologies primarily use a combination of historical market data, current market conditions, proprietary forecasting expertise, complex models to develop asset class return forecasts and a building block approach. The forecasts are developed using variables such as real risk-free interest, inflation, and asset class specific risk premiums. For equities, the risk premium is based on an assumed average equity risk premium of 5% over cash. The forecasted return on private equity and opportunistic investments are estimated at a 2% premium above public equity, reflecting a premium for higher volatility and lower liquidity. For fixed income, the risk premium is based off of a comprehensive modeling of credit spreads.
Fair Value of Plan Assets
The PBOP Plan and the Southern California Edison Company Retirement Plan Trust (Master Trust) assets include investments in equity securities, U.S. treasury securities, other fixed-income securities, common/collective funds, mutual funds, other investment entities, foreign exchange and interest rate contracts, and partnership/joint ventures. Equity securities, U.S. treasury securities, mutual and money market funds are classified as Level 1 as fair value is determined by observable, unadjusted quoted market prices in active or highly liquid and transparent markets. The fair value of the underlying investments in equity mutual funds are based on stock-exchange prices. The fair value of the underlying investments in fixed-income mutual funds and other fixed income securities including municipal bonds are based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes, issuer spreads, bids, offers and relevant credit information. Foreign exchange and interest rate contracts are classified as Level 2 because the values are based on observable prices but are not traded on an exchange. Futures contracts trade on an exchange and therefore are classified as Level 1. Common/collective funds and partnerships are measured at fair value using the net asset value per share ("NAV") and have not been classified in the fair value hierarchy. Other investment entities are valued similarly to common/collective funds and are therefore classified as NAV. The Level 1 registered investment companies are either mutual or money market funds. The remaining funds in this category are readily redeemable and classified as NAV and are discussed further at Note 8 to the pension plan master trust investments table below.
Edison International reviews the process/procedures of both the pricing services and the trustee to gain an understanding of the inputs/assumptions and valuation techniques used to price each asset type/class. The trustee and Edison International's validation procedures for pension and PBOP equity and fixed income securities are the same as the nuclear decommissioning trusts. For further discussion, see Note 4. The values of Level 1 mutual and money market funds are publicly quoted. The trustees obtain the values of common/collective and other investment funds from the fund managers. The values of partnerships are based on partnership valuation statements updated for cash flows. SCE's investment managers corroborate the trustee fair values.

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Pension Plan
The following table sets forth the Master Trust investments for Edison International and SCE that were accounted for at fair value as of December 31, 20162017 by asset class and level within the fair value hierarchy:
(in millions)Level 1 Level 2 Level 3 
NAV1
 TotalLevel 1 Level 2 Level 3 
NAV1
 Total
U.S. government and agency securities2
$217
 $309
 $
 $
 $526
$184
 $507
 $
 $
 $691
Corporate stocks3
720
 15
 
 
 735
718
 11
 
 
 729
Corporate bonds4

 725
 
 
 725

 676
 
 
 676
Common/collective funds5

 
 
 692
 692

 
 
 705
 705
Partnerships/joint ventures6

 
 
 333
 333

 
 
 396
 396
Other investment entities7

 
 
 253
 253

 
 
 262
 262
Registered investment companies8
124
 
 
 6
 130
140
 
 
 
 140
Interest-bearing cash42
 
 
 
 42
9
 
 
 
 9
Other
 112
 
 
 112

 106
 
 
 106
Total$1,103
 $1,161
 $
 $1,284
 $3,548
$1,051
 $1,300
 $
 $1,363
 $3,714
Receivables and payables, net 
  
    
 (160) 
  
    
 (98)
Net plan assets available for benefits 
  
    
 $3,388
 
  
    
 $3,616
SCE's share of net plan assets        $3,172
        $3,390
The following table sets forth the Master Trust investments that were accounted for at fair value as of December 31, 20152016 by asset class and level within the fair value hierarchy:
(in millions)Level 1 Level 2 Level 3 
NAV1
 TotalLevel 1 Level 2 Level 3 
NAV1
 Total
U.S. government and agency securities2
$127
 $298
 $
 $
 $425
$217
 $309
 $
 $
 $526
Corporate stocks3
720
 16
 
 
 736
720
 15
 
 
 735
Corporate bonds4

 755
 
 
 755

 725
 
 
 725
Common/collective funds5

 
 
 640
 640

 
 
 692
 692
Partnerships/joint ventures6

 
 
 325
 325

 
 
 333
 333
Other investment entities7

 
 
 263
 263

 
 
 253
 253
Registered investment companies8
117
 
 
 4
 121
124
 
 
 6
 130
Interest-bearing cash6
 
 
 
 6
42
 
 
 
 42
Other1
 96
 
 
 97

 112
 
 
 112
Total$971
 $1,165
 $
 $1,232
 $3,368
$1,103
 $1,161
 $
 $1,284
 $3,548
Receivables and payables, net 
  
    
 (70) 
  
    
 (160)
Net plan assets available for benefits 
  
    
 $3,298
 
  
    
 $3,388
SCE's share of net plan assets        $3,080
        $3,172
1 
These investments are measured at fair value using the net asset value per share practical expedient and have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the net plan assets available for benefits.
2 
Level 1 U.S. government and agency securities are U.S. treasury bonds and notes. Level 2 primarily relates to the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation.
3 
Corporate stocks are diversified. At December 31, 20162017 and 2015,2016, respectively, performance for actively managed separate accounts is primarily benchmarked against the Russell Indexes (62%(54%) and (59%(62%) and Morgan Stanley Capital International (MSCI) index (38%(46%) and (41%(38%).
4 
Corporate bonds are diversified. At December 31, 20162017 and 2015,2016, respectively, this category includes $76$65 million and $123$76 million for collateralized mortgage obligations and other asset backed securities of which $27$18 million and $25$27 million are below investment grade.

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5 
At December 31, 20162017 and 2015,2016, respectively, the common/collective assets were invested in equity index funds that seek to track performance of the Standard and Poor's (S&P 500)500 Index (45%(41% and 46%45%) and Russell 1000 indexes (15% and 14%). At both December 31, 2017 and 2016, and 2015, 15% and 16% of the assets in this category are in index funds which seek to track performance in the MSCI All Country World Index exUSexUS. At December 31, 2017 and MSCI Europe, Australasia and Far East (EAFE) Index, respectively. A2016, a non-index U.S. equity fund representing 23%25% and 22%23% of this category for 20162017 and 2015,2016, respectively, is actively managed.
6 
At both December 31, 2017 and 2016, and 2015, respectively, 55% and 51% are invested in private equity funds with investment strategies that include branded consumer products, clean technology and California geographic focus companies,companies. At December 31, 2017 and 2016, respectively, 23% and 22% and 20% are invested in publicly traded fixed income securities, 18% 20%and 14%18% are invested in a broad range of financial assets in all global markets and 4%2% and 15%4% of the remaining partnerships are invested in asset backed securities, including distressed mortgages and commercial and residential loans and debt and equity of banks.
7 
Other investment entities were primarily invested in (1) emerging market equity securities, (2) a hedge fund that invests through liquid instruments in a global diversified portfolio of equity, fixed income, interest rate, foreign currency and commodities markets, and (3) domestic mortgage backed securities.
8 
Level 1 of registered investment companies primarily consisted of a global equity mutual fund which seeks to outperform the MSCI World Total Return Index. The funds classified as NAV primarily consisted of a fixed income securities fund.
At December 31, 20162017 and 2015,2016, respectively, approximately 69%67% and 63%69% of the publicly traded equity investments, including equities in the common/collective funds, were located in the United States.
Postretirement Benefits Other than Pensions
The following table sets forth the VEBA Trust assets for Edison International and SCE that were accounted for at fair value as of December 31, 20162017 by asset class and level within the fair value hierarchy:
(in millions)Level 1 Level 2 Level 3 
NAV1
 TotalLevel 1 Level 2 Level 3 
NAV1
 Total
U.S. government and agency securities2
$222
 $59
 $
 $
 $281
$398
 $33
 $
 $
 $431
Corporate stocks3
230
 
 
 
 230
254
 
 
 
 254
Corporate notes and bonds4

 877
 
 
 877

 845
 
 
 845
Common/collective funds5

 
 
 462
 462

 
 
 569
 569
Partnerships6

 
 
 79
 79

 
 
 82
 82
Registered investment companies7
48
 
 
 1
 49
37
 
 
 
 37
Interest bearing cash48
 
 
 
 48
42
 
 
 
 42
Other8
4
 103
 
 
 107
5
 84
 
 
 89
Total$552
 $1,039
 $
 $542
 $2,133
$736
 $962
 $
 $651
 $2,349
Receivables and payables, net 
  
    
 (31) 
  
    
 (19)
Combined net plan assets available for benefits 
  
    
 $2,102
 
  
    
 $2,330

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The following table sets forth the VEBA Trust assets for SCE that were accounted for at fair value as of December 31, 20152016 by asset class and level within the fair value hierarchy:
(in millions)Level 1 Level 2 Level 3 
NAV1
 TotalLevel 1 Level 2 Level 3 
NAV1
 Total
U.S. government and agency securities2
$200
 $42
 $
 $
 $242
$222
 $59
 $
 $
 $281
Corporate stocks3
222
 
 
 
 222
230
 
 
 
 230
Corporate notes and bonds4

 867
 
 
 867

 877
 
 
 877
Common/collective funds5

 
 
 424
 424

 
 
 462
 462
Partnerships6

 
 
 93
 93

 
 
 79
 79
Registered investment companies7
60
 
 
 3
 63
48
 
 
 1
 49
Interest bearing cash31
 
 
 
 31
48
 
 
 
 48
Other8
5
 113
 
 
 118
4
 103
 
 
 107
Total$518
 $1,022
 $
 $520
 $2,060
$552
 $1,039
 $
 $542
 $2,133
Receivables and payables, net 
  
    
 (24) 
  
    
 (31)
Combined net plan assets available for benefits 
  
    
 $2,036
 
  
    
 $2,102
1 
These investments are measured at fair value using the net asset value per share practical expedient and have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the net plan assets available for benefits.
2 
Level 1 U.S. government and agency securities are U.S. treasury bonds and notes. Level 2 primarily relates to the Federal Home Loan Mortgage Corporation and the Federal National Mortgage Association.
3 
Corporate stock performance for actively managed separate accounts is primarily benchmarked against the Russell Indexes (47%(64% and 47%) and the MSCI All Country World Index (53%(36% and 53%) for both2017 and 2016, and 2015.respectively.
4 
Corporate notes and bonds are diversified and include approximately $47$36 million and $27$47 million for commercial collateralized mortgage obligations and other asset backed securities at December 31, 20162017 and 2015,2016, respectively.
5 
At December 31, 2017 and 2016, respectively, 75% and 2015, respectively, 39% and 38% of the common/collective assets are invested in a large cap index fund which seeks to track performance of the Russell 1000 index. 39% and 41% of the remaining assets in this category are in index funds which seek to track performance in the MSCI All Country World Index Investable Market Index and MSCI Europe, Australasia and Far East (EAFE) Index. 17% and 18% and 17%are invested in a non-index U.S. equity fund which is actively managed. The remaining assets in this category are primarily invested in emerging market fund at December 31, 2017 and a large cap index fund which seeks to track performance of the Russell 1000 index at December 31, 2016.
6 
At December 31, 2017 and 2016, respectively, 56% and 2015, respectively, 59% and 56% of the partnerships are invested in private equity and venture capital funds. Investment strategies for these funds include branded consumer products, clean and information technology and healthcare. 31%33% and 21%31% are invested in a broad range of financial assets in all global markets. 9% and 23% of the remaining partnerships category for both years is invested in asset backed securities including distressed mortgages, distressed companies and commercial and residential loans and debt and equity of banks.
7 
At December 31, 2017, registered investment companies were primarily invested in (1) a money market fund, (2) exchange rate trade funds which seek to track performance of MSCI Emerging Market Index, Russell 2000 Index, and international small cap equities. At December 31, 2016, Level 1 registered investment companies consist of a money market fund.
8 
Other includes $76$60 million and $97$76 million of municipal securities at December 31, 20162017 and 2015,2016, respectively.
At December 31, 20162017 and 2015,2016, respectively, approximately 63%61% and 71%63% of the publicly traded equity investments, including equities in the common/collective funds, were located in the United States.
Stock-Based Compensation
Edison International maintains a shareholder approvedshareholder-approved incentive plan (the 2007 Performance Incentive Plan) that includes stock-based compensation. The maximum number of shares of Edison International's common stock authorized to be issued or transferred pursuant to awards under the 2007 Performance Incentive Plan, as amended, is 66 million shares, plus the number of any shares awardedsubject to awards issued under Edison International's prior plans that areand outstanding as of April 26, 2007, which expire, cancel or terminate without being exercised or shares being issued ("carry-over shares").issued. As of December 31, 2016,2017, Edison International had approximately 3230 million shares remaining available for new award grants under its stock-based compensation plans.

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The following table summarizes total expense and tax benefits (expense) associated with stock based compensation:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Stock-based compensation expense1:
                      
Stock options$14
 $14
 $16
 $7
 $8
 $8
$14
 $14
 $14
 $8
 $7
 $8
Performance shares13
 7
 16
 6
 4
 8
2
 13
 7
 2
 6
 4
Restricted stock units6
 7
 7
 3
 4
 4
6
 6
 7
 3
 3
 4
Other1
 1
 1
 
 
 
1
 1
 1
 
 
 
Total stock-based compensation expense$34
 $29
 $40
 $16
 $16
 $20
$23
 $34
 $29
 $13
 $16
 $16
Income tax benefits related to stock compensation expense$41
 $12
 $16
 $20
 $7
 $8
Income tax benefits related to stock compensation expense2
$72
 $41
 $12
 $15
 $20
 $7
Excess tax benefits2

 15
 15
 
 23
 20

 
 15
 
 
 23
1 
Reflected in "Operation and maintenance" on Edison International's and SCE's consolidated statements of income.
2 
Reflected in "Settlements of stock-based compensation, net" in the financing section of Edison International's and SCE's consolidated statements of cash flows, "Common stock" in Edison International's consolidated balance sheets and "Additional paid-in capital" in SCE's consolidated balance sheets. Edison International and SCE adopted theUnder new accounting guidance adopted in 2016, share-based payments may create a permanent difference between the amount of compensation expense recognized for shared-based payments, see Notebook and tax purposes. Beginning January 1, for further information.2016, the excess tax impact of this permanent difference is recognized in earnings in the period it is created.
Stock Options
Under various plans,the 2007 Performance Incentive Plan, Edison International has granted stock options at exercise prices equal to the closing price at the grant date. Prior to 2007, average of the high and low price was used. Edison International may grant stock options and other awards related to, or with a value derived from, its common stock to directors and certain employees. Options generally expire 10 years after the grant date and vest over a period of four years of continuous service, with expense recognized evenly over the requisite service period, except for awards granted to retirement-eligible participants, as discussed in "Stock-Based Compensation" in Note 1. Additionally, Edison International will substitute cash awards to the extent necessary to pay tax withholding or any government levies.
The fair value for each option granted was determined as of the grant date using the Black-Scholes option-pricing model. The Black-Scholes option-pricing model requires various assumptions noted in the following table:
Years ended December 31,Years ended December 31,
2016 2015 20142017 2016 2015
Expected terms (in years)5.9 5.9 6.05.7 5.9 5.9
Risk-free interest rate1.2% – 2.2% 1.6% – 2.1% 1.8% – 2.1%2.1% - 2.3% 1.2% – 2.2% 1.6% – 2.1%
Expected dividend yield2.5% – 3.0% 2.6% – 3.2% 2.4% – 2.7%2.7% - 3.8% 2.5% – 3.0% 2.6% – 3.2%
Weighted-average expected dividend yield2.9% 2.6% 2.7%2.7% 2.9% 2.6%
Expected volatility17.2% – 17.5% 16.4% – 17.0% 17.8% – 19.1%17.8% - 20.9% 17.2% – 17.5% 16.4% – 17.0%
Weighted-average volatility17.4% 16.5% 18.9%17.9% 17.4% 16.5%
The expected term represents the period of time for which the options are expected to be outstanding and is primarily based on historical exercise and post-vesting cancellation experience and stock price history. The risk-free interest rate for periods within the contractual life of the option is based on a zero coupon U.S. Treasury STRIPS (separate trading of registered interest and principal of securities) whose maturity equals the option's expected term on the measurement date. Expected volatility is based on the historical volatility of Edison International's common stock for the length of the option's expected term for 2016.2017. The volatility period used was 7168 months, 71 months and 7271 months at December 31, 2017, 2016 2015 and 2014,2015, respectively.

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The following is a summary of the status of Edison International's stock options:
  Weighted-Average    Weighted-Average  
Stock options 
Exercise
Price
 
Remaining
Contractual
Term (Years)
 
Aggregate
Intrinsic Value
(in millions)
Stock options 
Exercise
Price
 
Remaining
Contractual
Term (Years)
 
Aggregate
Intrinsic Value
(in millions)
Edison International:          
Outstanding at December 31, 201512,866,597
 $45.93
    
Outstanding at December 31, 201611,544,501
 $50.26
    
Granted2,120,009
 67.41
    
1,359,599
 79.23
    
Expired
 
    

 
    
Forfeited(274,166) 64.02
    
(163,449) 69.76
    
Exercised(3,167,939) 42.93
    
(4,918,086) 43.77
    
Outstanding at December 31, 20177,822,565
 58.98
 6.37  
Vested and expected to vest at December 31, 20177,740,798
 58.81
 6.35 $62
Exercisable at December 31, 20174,241,658
 $50.48
 5.09 $58
SCE:     
Outstanding at December 31, 201611,544,501
 50.26
 6.02  
4,727,416
 $51.81
    
Vested and expected to vest at December 31, 201611,437,110
 50.12
 5.99 $250
Exercisable at December 31, 20167,685,341
 $43.99
 4.93 $215
SCE:     
Outstanding at December 31, 20155,840,057
 $47.77
    
Granted959,478
 67.36
    
699,538
 79.12
    
Expired
 
    

 
    
Forfeited(120,842) 61.96
    
(77,165) 66.27
    
Exercised(1,705,053) 44.59
    
(987,161) 48.63
    
Transfers, net(246,224) 59.29
  83,074
 46.47
  
Outstanding at December 31, 20164,727,416
 51.81
 6.24  
Vested and expected to vest at December 31, 20164,667,784
 51.63
 6.21 $95
Exercisable at December 31, 20162,782,770
 $44.04
 4.84 $78
Outstanding at December 31, 20174,445,702
 56.46
 5.99  
Vested and expected to vest at December 31, 20174,402,254
 56.28
 5.96 $45
Exercisable at December 31, 20172,555,160
 $46.94
 4.52 $43
At December 31, 2016,2017, total unrecognized compensation cost related to stock options and the weighted-average period the cost is expected to be recognized are as follows:
(in millions)Edison International SCEEdison International SCE
Unrecognized compensation cost, net of expected forfeitures$13
 $8
$13
 $7
Weighted-average period (in years)2.3
 2.3
2.4
 2.3

8592




Supplemental Data on Stock Options
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions, except per award amounts)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Stock options:                      
Weighted average grant date fair value per option granted$7.38
 $7.54
 $7.26
 $7.50
 $7.53
 $7.34
$10.65
 $7.38
 $7.54
 $10.63
 $7.50
 $7.53
Fair value of options vested11
 20
 17
 5
 11
 9
11
 11
 20
 5
 5
 11
Cash used to purchase shares to settle options220
 170
 300
 118
 69
 181
293
 220
 170
 77
 118
 69
Cash from participants to exercise stock options136
 113
 205
 77
 45
 125
167
 136
 113
 48
 77
 45
Value of options exercised84
 57
 95
 41
 24
 56
126
 84
 57
 29
 41
 24
Tax benefits from options exercised34
 23
 39
 17
 10
 23
51
 34
 23
 12
 17
 10
Performance Shares
A target number of contingent performance shares were awarded to executives in March 2017, 2016 2015 and 20142015 and vest at December 31, 2019, 2018 2017 and 2016,2017, respectively. The vesting of the grants is dependent upon market and financial performance and service conditions as defined in the grants for each of the years. The number of performance shares earned from each year's grants could range from zero to twice the target number (plus additional units credited as dividend equivalents). Performance shares awarded in 2014 that are earned are settled half in cash and half in common stock, while performance shares awarded in 2016 and 2015 that are earned are settled solely in cash. The portion of performance shares that can be settled in cash, isand are classified as a share-based liability award. The fair value of these shares is remeasuredre-measured at each reporting period, and the related compensation expense is adjusted. The portion of performance shares payable in common stock is classified as a share-based equity award. Compensation expense related to these shares is based on the grant-date fair value, which for each share is determined as the closing price of Edison International common stock on the grant date. However, with respect to the portion of the performance shares payable in common stock that is subject to the financial performance condition defined in the grants, the number of performance shares expected to be earned is subject to revision and updated at each reporting period, with a related adjustment to compensation expense. Performance shares expense is recognized ratably over the requisite service period based on the fair values determined (subject to the adjustments discussed above), except for awards granted to retirement-eligible participants.
The fair value of market condition performance shares is determined using a Monte Carlo simulation valuation model.

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model for the total shareholder return. The fair value of the financial performance condition is determined using Edison International's earnings per share compared to pre-established targets.
The following is a summary of the status of Edison International's nonvested performance shares:
Equity Awards Liability Awards
Shares 
Weighted-Average
Grant Date
Fair Value
 Shares 
Weighted-Average
Fair Value
Shares 
Weighted-Average
Fair Value
Edison International:          
Nonvested at December 31, 201557,779
 $61.18
 165,629
 $68.44
Nonvested at December 31, 2016207,497
 $84.30
Granted
 
 111,754
  
81,874
  
Forfeited(1,258) 60.83
 (13,502)  (53,002)  
Vested1
(56,521) 61.18
 (56,384)  
(57,247)  
Nonvested at December 31, 2017179,122
 63.85
SCE:   
Nonvested at December 31, 2016
 
 207,497
 84.30
96,667
 $84.25
SCE:       
Nonvested at December 31, 201532,463
 $62.01
 90,393
 $68.64
Granted
 
 50,599
  
42,569
  
Forfeited(1,012) 49.73
 (5,751)  (25,061)  
Vested1
(29,080) 50.75
 (28,963)  
(26,427)  
Affiliate transfers, net(2,371) 72.10
 (9,611)  974
  
Nonvested at December 31, 2016
 
 96,667
 84.25
Nonvested at December 31, 201788,722
 64.01
1 
Relates to performance shares that will be paid in 20172018 as performance targets were met at December 31, 2016.2017.

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Restricted Stock Units
Restricted stock units were awarded to Edison International's and SCE's executives in March 2017, 2016 2015 and 20142015 and vest and become payable on January 2, 2020, 2019 January 2,and 2018, and January 3, 2017, respectively. Each restricted stock unit awarded includes a dividend equivalent feature and is a contractual right to receive one share of Edison International common stock, if vesting requirements are satisfied. The vesting of Edison International's restricted stock units is dependent upon continuous service through the end of the vesting period, except for awards granted to retirement-eligible participants.
The following is a summary of the status of Edison International's nonvested restricted stock units:
Edison International SCEEdison International SCE
Restricted
Stock Units
 
Weighted-Average
Grant Date
Fair Value
 
Restricted
Stock Units
 
Weighted-Average
Grant Date
Fair Value
Restricted
Stock Units
 
Weighted-Average
Grant Date
Fair Value
 
Restricted
Stock Units
 
Weighted-Average
Grant Date
Fair Value
Nonvested at December 31, 2015248,143
 $57.89
 134,375
 $58.13
Nonvested at December 31, 2016345,395
 $61.05
 160,788
 $60.80
Granted123,266
 67.42
 55,800
 67.37
91,528
 79.23
 47,100
 79.12
Forfeited(16,435) 63.73
 (7,580) 61.45
(7,311) 71.16
 (3,903) 67.65
Vested(9,579) 52.01
 (8,032) 56.53
(126,561) 51.08
 (64,266) 53.64
Affiliate transfers, net
 
 (13,775) 62.09

 
 1,699
 60.35
Nonvested at December 31, 2016345,395
 61.05
 160,788
 60.80
Nonvested at December 31, 2017303,051
 69.52
 141,418
 69.96
The fair value for each restricted stock unit awarded is determined as the closing price of Edison International common stock on the grant date.

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Workforce Reductions
SCE continues to focus on productivity improvements to mitigate rate pressure from its capital program, optimize its cost structure and improve operational efficiency. During the year ended December 31, 2016, SCE increased the estimated impact for approved workforce reductions.

The following table provides a summary of changes in the accrued severance liability associated with these reductions:

(in millions)  
Balance at January 1, 2016 $22
Additions 21
Payments (40)
Balance at December 31, 2016 $3
Severance costs are included in "Operation and maintenance" on the consolidated income statements.
Note 9.    Investments
Nuclear Decommissioning Trusts
Future decommissioning costs related to SCE's nuclear assets are expected to be funded from independent decommissioning trusts.
The following table sets forth amortized cost and fair value of the trust investments (see Note 4 for a discussion of fair value of the trust investments):
Longest
Maturity Date
 Amortized Cost Fair Value
Longest
Maturity Date
 Amortized Cost Fair Value
 December 31, December 31,
(in millions) 2016 2015 2016 2015 2017 2016 2017 2016
Stocks $319
 $304
 $1,547
 $1,460
 $236
 $319
 $1,596
 $1,547
Municipal bonds2054 659
 691
 766
 840
2054 643
 659
 768
 766
U.S. government and agency securities2055 1,131
 1,070
 1,191
 1,128
2067 1,235
 1,131
 1,319
 1,191
Corporate bonds2057 600
 708
 659
 755
2057 579
 600
 643
 659
Short-term investments and receivables/payables1
One-year 75
 144
 79
 148
One-year 110
 75
 114
 79
Total  $2,784
 $2,917
 $4,242
 $4,331
  $2,803
 $2,784
 $4,440
 $4,242
1
Short-term investments include $114$29 million and $81$114 million of repurchase agreements payable by financial institutions which earn interest, are fully secured by U.S. Treasury securities and mature by January 2, 2018 and January 4, 2017 and January 5, 2016 as of December 31, 2017 and 2016, and 2015, respectively.
Trust fund earnings (based on specific identification) increase the trust fund balance and the ARO regulatory liability. Unrealized holding gains, net of losses, were $1.5$1.6 billion and $1.4$1.5 billion at December 31, 20162017 and 2015, respectively.2016, respectively, and other-than-temporary impairments of $143 million and $170 million at the respective periods.

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The following table sets forth a summary of changes in the fair value of the trust:
 Years ended December 31,
(in millions)2016 2015 2014
Balance at beginning of period$4,331
 $4,799
 $4,494
Gross realized gains92
 326
 197
Gross realized losses(19) (26) (5)
Unrealized gains (losses)44
 (364) 75
Other-than-temporary impairments(36) (29) (14)
Interest, dividends and other116
 115
 118
Contributions
 54
 5
Income taxes(58) (64) (62)
Decommissioning disbursements(224) (471) (4)
Administrative expenses and other(4) (9) (5)
Balance at end of period$4,242
 $4,331
 $4,799
Trust assets are used to pay income taxes as the Trust files separate income taxes returns from SCE.taxes. Deferred tax liabilities related to net unrealized gains at December 31, 20162017 were $348$404 million. Accordingly, the fair value of Trusttrust assets available to pay future decommissioning costs, net of deferred income taxes, totaled $3.9$4.0 billion at December 31, 2017.
Gross realized gains were $244 million, $92 million and $326 million for the years ended December 31, 2017, 2016. and 2015, respectively. Gross realized losses were $23 million, $19 million and $26 million for the years ended December 31, 2017,

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2016 and 2015, respectively. Due to regulatory mechanisms, changes in assets of the trusts from income or loss items have no impact on operating revenue or earnings.

Beginning in 2016, funds for decommissioning costs are requested from the nuclear decommissioning trusts one month in advance. Decommissioning disbursements are funded from sales of investments of the nuclear decommissioning trusts.
Acquisitions
On December 31, 2015, Edison Energy acquired three businesses for an aggregate purchase price of approximately $100 million, of which $90 million was allocated to goodwill and identifiable intangibles. Under the terms of the acquisition of one of the agreements, the sellers were entitled to additional consideration (earn-out) in the event that certain financial thresholds were achieved. During the second quarter of 2016, Edison Energy entered into an agreement to buy-out this earn-out provision and recorded an after-tax charge of $13 million. The buy-out was completed, together with modification to employment contracts, in order to align long-term incentive compensation.
During 2016 and 2017, a subsidiary of SoCore Energy agreed to acquireacquired 100% equity interests in six solar garden development projects (42 MWdc) in Minnesota as part of thefrom SunEdison bankruptcy proceedings, subject to certain conditions. The maximum purchase price is $41.9 million if all projects achieve the required conditions.for $19.4 million. SoCore Energy would also reimbursereimbursed SunEdison up to $8.7$2.6 million of project-specific interconnection costs. Not all of the projects are expected to achieve the closing conditions. Through February 1, 2017, SoCore Energy acquired four of these development projects (28 MWdc) for $10.5 million.
Note 10.    Regulatory Assets and Liabilities
Included in SCE's regulatory assets and liabilities are regulatory balancing accounts. CPUC authorized balancing account mechanisms require SCE to refund or recover any differences between forecasted and actual costs. The CPUC has authorized balancing accounts for specified costs or programs such as fuel, purchased-power, demand-side management programs, nuclear decommissioning and public purpose programs. Certain of these balancing accounts include a return on rate base of 7.90% in 20162017 and 2015.2016. The CPUC also authorizes the use of a balancing account to recover from or refund to customers differences in revenue resulting from actual and forecasted electricity sales. The CPUC has also established a tax accounting memorandum account ("TAMA") to track tax benefits or costs associated with certain events to be adjusted annually in rates, including tax accounting method changes, changes in tax laws and regulations impacting depreciation or tax repair deductions, forecasted and actual differences in tax repair deductions.
Amounts included in regulatory assets and liabilities are generally recorded with corresponding offsets to the applicable income statement accounts.

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Regulatory Assets
SCE's regulatory assets included on the consolidated balance sheets are:
December 31,December 31,
(in millions)2016 20152017 2016
Current:      
Regulatory balancing accounts$135
 $382
$484
 $135
Energy derivatives150
 159
Unamortized investments, net49
 
Power contracts and energy derivatives203
 150
Unamortized investments, net of accumulated amortization5
 49
Other16
 19
11
 16
Total current350
 560
703
 350
Long-term:      
Deferred income taxes, net4,478
 3,757
Deferred income taxes, net of liabilities3,143
 4,478
Pensions and other postretirement benefits710
 849
271
 710
Energy derivatives947
 1,027
Unamortized investments, net80
 182
Power contracts and energy derivatives799
 947
Unamortized investments, net of accumulated amortization123
 80
San Onofre857
 1,043
72
 857
Unamortized loss on reacquired debt184
 201
168
 184
Regulatory balancing accounts66
 36
143
 66
Environmental remediation126
 129
144
 126
Other7
 288
51
 7
Total long-term7,455
 7,512
4,914
 7,455
Total regulatory assets$7,805

$8,072
$5,617

$7,805

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SCE's regulatory assets related to power contracts and energy derivatives are primarily an offset to unrealized losses on derivatives. The regulatory asset changes based on fluctuations inliabilities for the fair market valuepower contracts will be amortized over the remaining contract terms, approximately 3 to 6 years and will not earn a rate of the contracts, in which the original contracts expire in 10 to 45 years.return.
SCE's current and long-term unamortized investments include legacy meters retired as part of the Edison SmartConnect® program.program and beyond the meters. SCE's unamortized investments related to legacy meters are expected to bewere fully recovered byin 2017 and earned a rate of return of 6.46% in 20162017 and 2015.2016.
SCE's regulatory assets related to deferred income taxes represent tax benefits passed through to customers. The CPUC requires SCE to flow through certain deferred income tax benefits to customers by reducing electricity rates, thereby deferring recovery of such amounts to future periods. Based on current regulatory ratemaking and income tax laws, SCE expects to recover its regulatory assets related to deferred income taxes over the life of the assets that give rise to the accumulated deferred income taxes, approximately from 1 to 60 years. As a result of Tax Reform, SCE re-measured its deferred tax assets and liabilities as of December 31, 2017. For further information, see Note 7.
SCE's regulatory assets related to pensions and other post-retirement plans represent the unfunded net loss and prior service costs of the plans (see "Pension Plans and Postretirement Benefits Other than Pensions" discussion in Note 8). This amount is being recovered through rates charged to customers.
SCE'sSCE has long-term unamortized investments long-termwhich primarily include nuclear assets related to Palo Verde. Nuclear assets related to Palo Verde are expected to be recovered by 2047 and earned a return of 7.90% in 20162017 and 2015.2016.
In accordance with the Revised San Onofre OII Settlement Agreement, SCE is authorized to recover in rates itswrote down the San Onofre regulatory asset, generally overasset. SCE has requested to apply $72 million of the U.S. Department of Energy ("DOE") proceeds, currently reflected as a ten-year period commencing February 1, 2012. Underregulatory liability in the DOE litigation memorandum account, against the remaining San Onofre OII Settlement Agreement (see Note 11), SCE was allowed to earn a rate of return of 2.62% in 2016 and 2015 and is authorized to continue to earn this rate as adjusted during the amortization period thereafter with changes in SCE's authorized return on debt and preferred equity. SCE's regulatory assets related to San Onofre nuclear fuel will earn a return equal to commercial paper rate that the CPUC uses to calculate interest on balancing accounts. In a December 2016 joint ruling, the Assigned Commissioner and the Assigned ALJ directed SCE to meet and confer with the other parties in the OII to consider changing the terms of the San Onofre OII Settlement Agreement.asset. See Note 11 for further information.

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SCE's net regulatory asset related to its unamortized loss on reacquired debt will be recovered over the original amortization period of the reacquired debt over periods ranging from 10 to 35 years.years or the amortization period of life of the new issue if the debt is refunded or refinanced.
SCE's regulatory assets related to environmental remediation represents a portion of the costs incurred at certain sites that SCE is allowed to recover through customer rates. See "Environmental Remediation" discussed in Note 11.
Regulatory Liabilities
SCE's regulatory liabilities included on the consolidated balance sheets are:
December 31,December 31,
(in millions)2016 20152017 2016
Current:      
Regulatory balancing accounts$736
 $1,106
$1,009
 $736
Energy derivatives74
 
Other20
 22
38
 20
Total current756
 1,128
1,121
 756
Long-term:      
Costs of removal2,847
 2,781
2,741
 2,847
Re-measurement of deferred taxes2,892
 
Recoveries in excess of ARO liabilities1,639
 1,502
1,575
 1,639
Regulatory balancing accounts1,180
 1,314
1,316
 1,180
Other postretirement benefits26
 
Other60
 79
64
 60
Total long-term5,726
 5,676
8,614
 5,726
Total regulatory liabilities$6,482
 $6,804
$9,735
 $6,482

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SCE's regulatory liabilities related to costs of removal represent differences between asset removal costs recorded and amounts collected in rates for those costs.
As a result of Tax Reform, SCE's deferred tax assets and liabilities were re-measured at December 31, 2017 resulting in an increase in regulatory liabilities which is subject to change based on the outcome of the regulatory process. The regulatory liabilities are generally expected to be refunded to customers over the lives of the assets and liabilities that gave rise to the deferred taxes. For further information, see Note 7.
SCE's regulatory liabilities related to recoveries in excess of ARO liabilities represents the cumulative differences between ARO expenses and amounts collected in rates primarily for the decommissioning of the SCE's nuclear generation facilities. Decommissioning costs recovered through rates are primarily placed in nuclear decommissioning trusts. This regulatory liability also represents the deferral of realized and unrealized gains and losses on the nuclear decommissioning trust investments. See Note 9.9 for further discussion.
Net Regulatory Balancing Accounts
Balancing account over and under collections represent differences between cash collected in current rates for specified forecasted costs and such costs that are actually incurred. Undercollections are recorded as regulatory balancing account assets. Overcollections are recorded as regulatory balancing account liabilities. With some exceptions, SCE seeks to adjust rates on an annual basis or at other designated times to recover or refund the balances recorded in its balancing accounts. Regulatory balancing accounts that SCE does not expect to collect or refund in the next 12 months are reflected in the long-term section of the consolidated balance sheets. Regulatory balancing accounts do not have the right of offset and are presented gross in the consolidated balance sheets. Under and over collections accrue interest based on a three-month commercial paper rate published by the Federal Reserve.

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The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities:
December 31,December 31,
(in millions)2016 20152017 2016
Asset (liability)      
Energy resource recovery account$(20) $(439)$464
 $(20)
New system generation balancing account(6) (171)(197) (6)
Public purpose programs and energy efficiency programs(992) (683)(1,145) (992)
Base revenue requirement balancing account(426) (319)(200) (426)
Tax accounting memorandum account and pole loading(142) (248)
DOE litigation memorandum account1
(122) 
Tax accounting memorandum account and pole loading balancing account(259) (142)
DOE litigation memorandum account(156) (122)
Greenhouse gas auction revenue31
 (75)(22) 31
FERC balancing accounts(69) 74
(205) (69)
Other31
 (141)22
 31
Liability$(1,715) $(2,002)$(1,698) $(1,715)
1 Represents proceeds from the Department of Energy ("DOE") resulting from its failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. Damages recovered are subject to CPUC review as to how these amounts would be distributed among customers, shareholders, or to offset fuel decommissioning or storage costs. See Note 11 for further discussion.
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Note 11.    Commitments and Contingencies
Third-Party Power Purchase Agreements
SCE entered into various agreements to purchase power, electric capacity and other energy products. At December 31, 2017, the undiscounted future expected payments for the SCE power purchase agreements (primarily related to renewable energy contracts), which were approved by the CPUC and met other critical contract provisions (including completion of major milestones for construction), to purchase power and electric capacity, including:
Renewable Energy Contracts – California law requires retail sellers of electricity to comply with a RPS by delivering renewable energy, primarily through power purchase contracts. Renewable energy contracts generally contain escalation clauses requiring increases in payments. As of December 31, 2016, SCE had 119 renewable energy contracts.
QF Power Purchase Agreements – Under the Public Utility Regulatory Policies Act of 1978 ("PURPA"), electric utilities are required, with exceptions, to purchase energy and capacity from independent power producers that are qualifying co-generation facilities and qualifying small power production facilities or QFs. As of December 31, 2016, SCE had 55 QF contracts.
Other Power Purchase Agreements – SCE has entered into 30 other power purchase agreements, including combined heat and power contracts, tolling arrangements and resource adequacy contracts.
At December 31, 2016, the undiscounted future minimum expected payments for the SCE power purchase agreements that have been approved by the CPUC and have completed major milestones for construction were as follows:
(in millions)
Renewable
Energy
Contracts
 
QF Power
Purchase
Agreements
 
Other Purchase
Agreements
Total
2017$1,516
 $187
 $769
20181,606
 148
 604
$2,513
20191,704
 87
 516
2,513
20201,776
 39
 472
2,614
20211,786
 16
 420
2,582
20222,562
Thereafter22,811
 53
 1,258
27,093
Total future commitments$31,199
 $530
 $4,039
$39,877
The table above includes contractual obligations for power procurement contracts that met the critical contract provisions as of December 31, 2016 in which the term is over a year when it was executed. Additionally, SCE has signed contracts (including capacity reduction contracts with customers) that have not met the critical contract provisions that would increase contractual obligations by $53$29 million in 2017, $2352018, $109 million in

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2018, 2019, $231 million in 2020, $312 million in 2019, $5542021, $301 million in 2020, $630 million in 20212022 and $9.1$3.8 billion thereafter, if all principalcritical contract provisions are completed.
Costs incurred for power purchase agreements were $3.6 billion in 2017, $3.3 billion in 2016 and $3.2 billion in 2015, and $3.8 billion in 2014, which include costs associated with contracts with terms of less than one year.
Many of theCertain power purchase agreements that SCE entered into with independent power producers are accounted for as leases. The following table shows the future minimum lease payments due under the contracts that are treated as operating and capital leases (these amounts are also included in the table above). Due to the inherent uncertainty associated with the reliability of the fuel source, expected purchases from most renewable energy contracts do not meet the definition of a minimum lease payment and have been excluded from the operating and capital lease table below but remain in the table above. The future minimum lease payments for capital leases are discounted to their present value in the table below using SCE's incremental borrowing rate at the inception of the leases. The amount of this discount is shown in the table below as the amount representing interest.
(in millions)
Operating
Leases
 
Capital
Leases
Operating
Leases
 
Capital
Leases
2017$341
 $1
2018237
 1
$335
 $2
2019161
 1
262
 2
2020146
 2
234
 2
2021142
 2
198
 3
2022174
 3
Thereafter1,355
 9
1,222
 21
Total future commitments$2,382
 $16
$2,425
 $33
Amount representing executory costs 
 (7) 
 (15)
Amount representing interest 
 (2) 
 (8)
Net commitments 
 $7
 
 $10
Operating lease expense for power purchase agreements was $2.3 billion in 2017, and $1.9 billion in 2016 and $1.7
$1.7 billion in both 2015 and
2014 (including contingent rents of $1.8 billion in 2017, $1.4 billion in 2016 and $1.1 billion in 2015 and $944 million in 2014)2015). Contingent rents for capital leases were $99 million in 2017, $109 million in 2016 and less than $1 million in both 2015 and 2014.2015. The timing of SCE's recognition of the lease expense conforms to ratemaking treatment for SCE's recovery of the cost of electricity and is included in purchased power.

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Other Lease Commitments
The following summarizes the estimated minimum future commitments for SCE's non-cancelable other operating leases (excluding SCE's power purchase agreements discussed above):
(in millions)
Operating
Leases –
Other
2017$52
201846
201937
202028
202122
Thereafter258
Total future commitments$443
Operating lease expense for other leases (primarily related to vehicles, office space and other equipment):
(in millions)Total
2018$48
201937
202027
202120
202215
Thereafter99
Total future commitments$246
Operating lease expense for other leases were $68$59 million in 2017, 2016$68 million, in 2016 and $80 million in 2015 and $96 million in 2014.2015. Certain leases on office facilities contain escalation clauses requiring annual increases in rent. The rentals payable under these leases may increase by a fixed amount each year, a percentage over base year, or the customerconsumer price index.

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Other Commitments
The following summarizes the estimated minimum future commitments for SCE's other commitments:
(in millions)2017 2018 2019 2020 2021 Thereafter Total2018 2019 2020 2021 2022 Thereafter Total
Other contractual obligations$156
 $141
 $103
 $98
 $82
 $631
 $1,211
$127
 $72
 $69
 $45
 $46
 $345
 $704
Costs incurred for other commitments were $141$75 million in 2017, 2016$141 million, in 2016 and $182 million in 2015 and $90 million in 2014.2015. SCE has fuel supply contracts for Palo Verde which require payment only if the fuel is made available for purchase. SCE also has commitments related to maintaining reliability and expanding SCE's transmission and distribution system.
The table above excludes other contractual obligations that have not met the critical contract provisions. As of December 31, 2016, SCE has signed capacity reduction contracts that have not met critical contract provisions and are, therefore, not included in the table above. These contracts would increase the contractual obligations by $3 million in 2017, $24 million in 2018, $94 million in 2019, $93 million in 2020, $71 million in 2021, and $478 million thereafter, if all principal provisions are completed.
The table above does not include asset retirement obligations, which are discussed in Note 1.
Indemnities
Edison International and SCE have various financial and performance guarantees and indemnity agreements which are issued in the normal course of business.
Edison International and SCE have provided indemnifications through contracts entered into in the normal course of business. These are primarily indemnifications against adverse litigation outcomes in connection with underwriting agreements, and indemnities for specified environmental liabilities and income taxes with respect to assets sold. Edison International's and SCE's obligations under these agreements may or may not be limited in terms of time and/or amount, and in some instances Edison International and SCE may have recourse against third parties. Edison International and SCE have not recorded a liability related to these indemnities. The overall maximum amount of the obligations under these indemnifications cannot be reasonably estimated.
SCE has indemnified the City of Redlands, California in connection with Mountainview'sthe Mountainview power plant's California Energy Commission permit for cleanup or associated actions related to groundwater contaminated by perchlorate due to the disposal of filter cake at the City's solid waste landfill. The obligations under this agreement are not limited to a specific time period or subject to a maximum liability. SCE has not recorded a liability related to this indemnity.
Contingencies
In addition to the matters disclosed in these Notes, Edison International and SCE are involved in other legal, tax and regulatory proceedings before various courts and governmental agencies regarding matters arising in the ordinary course of business. Edison International and SCE believe the outcome of these other proceedings will not, individually or in the aggregate, materially affect its financial position, results of operations and cash flows.
Southern California Wildfires
In December 2017, several wind-driven wildfires (the "December 2017 Wildfires") impacted portions of SCE's service territory and caused substantial damage to both residential and business properties and service outages for SCE customers.

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The largest of these fires, known as the Thomas Fire, originated in Ventura County and burned acreage located in both Ventura and Santa Barbara Counties. According to the most recent California Department of Forestry and Fire Protection ("Cal Fire") incident information reports, the Thomas Fire burned over 280,000 acres, destroyed an estimated 1,063 structures, damaged an estimated 280 structures and resulted in two fatalities. During 2017, SCE incurred approximately $35 million of capital expenditures related to restoration of service resulting from the December 2017 Wildfires.
The causes of the December 2017 Wildfires are being investigated by Cal Fire and other fire agencies. SCE believes the investigations include the possible role of SCE's facilities. SCE expects that one or more of the fire agencies will ultimately issue reports concerning the origins and causes of the December 2017 Wildfires but cannot predict when these reports will be released or if any findings will be issued before the investigations are completed.
Any potential liability of SCE for December 2017 Wildfire-related damages will depend on a number of factors, including whether SCE is determined to have substantially caused, or contributed to, the damages and whether parties seeking recovery of damages will be required to show negligence in addition to causation. Certain California courts have previously found utilities to be strictly liable for property damage, regardless of fault, by applying the theory of inverse condemnation when a utility's facilities were determined to be a substantial cause of a wildfire that caused the property damage. The rationale stated by these courts for applying this theory to investor-owned utilities is that property losses resulting from a public improvement, such as the distribution of electricity, can be spread across the larger community that benefited from such improvement. However, in December 2017, the CPUC issued a decision denying the investor-owned utility's request to include in its rates uninsured wildfire-related costs arising from several 2007 fires, finding that the investor-owned utility did not prudently manage and operate its facilities prior to or at the outset of the 2007 wildfires.
In addition to liability for property damages, when inverse condemnation is found to be applicable to a utility, the utility may be held liable, without regard to fault, for associated interest and attorney's fees (collectively, "Property Losses"). If inverse condemnation is held to be inapplicable to SCE in connection with the December 2017 Wildfires, SCE could still be held liable for Property Losses if those losses were found to have been proximately caused by SCE’s negligence. If SCE was found negligent, SCE also could be held liable for fire suppression costs, business interruption losses, evacuation costs, medical expenses and personal injury/wrongful death claims. These potential liabilities, in the aggregate, could be substantial. Additionally, SCE could potentially be subject to fines for alleged violations of CPUC rules and laws in connection with the December 2017 Wildfires.
SCE is aware of multiple lawsuits filed related to the December 2017 Wildfires naming SCE as a defendant. One of these lawsuits also named Edison International as a defendant. At least four of these lawsuits were filed as purported class actions. The lawsuits, which have been filed in the superior courts of Ventura, Santa Barbara and Los Angeles Counties allege, among other things, negligence, inverse condemnation, trespass, private nuisance, and violations of the public utility and health and safety codes. SCE expects to be the subject of additional lawsuits related to the December 2017 Wildfires. The litigation could take a number of years to be resolved because of the complexity of the matters and the time needed to complete the ongoing investigations.
Given the preliminary stages of the investigations and the uncertainty as to the causes of the December 2017 Wildfires, and the extent and magnitude of potential damages, Edison International and SCE are currently unable to reasonably estimate whether SCE will incur material losses and, if so, the range of possible losses that could be incurred.
SCE has approximately $1 billion of wildfire-specific insurance coverage, subject to a self-insured retention of $10 million per occurrence, for wildfire-related claims for the period ending on May 31, 2018. SCE also has approximately $300 million of additional insurance coverage for wildfire-related occurrences for the period from December 31, 2017 to December 31, 2018 which may be used in addition to the $1 billion in wildfire insurance for wildfire events occurring on or after December 31, 2017 and on or before May 31, 2018, and would be available for new wildfire events, if any, occurring after May 31, 2018 and on or before December 30, 2018. Various coverage limitations within the policies that make up SCE's wildfire insurance coverage could result in material self-insured costs in the event of multiple wildfire occurrences during a policy period. SCE also has other general liability insurance coverage of approximately $450 million but it is uncertain whether these other policies would apply to liabilities alleged to be related to wildfires. Should responsibility for damages be attributed to SCE for a significant portion of the losses related to the December 2017 Wildfires, SCE's insurance may not be sufficient to cover all such damages. SCE or its vegetation management contractors may experience coverage reductions and/or increased insurance costs in future years. No assurance can be given that future losses will not exceed the limits of insurance coverage.
In addition, SCE may not be authorized to recover its uninsured damages through customer rates if, for example, the CPUC finds that the damages were incurred because SCE was not a prudent manager of its facilities. The CPUC's Safety and Enforcement Division ("SED") is conducting an investigation to assess the compliance of SCE’s facilities with applicable rules and regulations in areas impacted by the December 2017 Wildfires.

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Edison International and SCE are pursuing legislative, regulatory and legal solutions to the application of a strict liability standard to wildfire-related damages without the ability to recover resulting costs from customers. Edison International and SCE cannot predict whether or when a solution mitigating the significant risk faced by a California investor-owned utility related to wildfires will be achieved.
Montecito Mudslides
In January 2018, torrential rains in Santa Barbara County produced mudslides and flooding in Montecito and surrounding areas (the "Montecito Mudslides"). According to Santa Barbara County, the Montecito Mudslides destroyed an estimated 135 structures, damaged an estimated 324 structures, and resulted in at least 21 fatalities, with two additional fatalities presumed.
Six of the lawsuits mentioned above allege that SCE has responsibility for the Thomas Fire and that the Thomas Fire proximately caused the Montecito Mudslides, resulting in the plaintiffs' claimed damages. SCE expects that additional lawsuits related to the Montecito Mudslides will be filed.
As noted above, the cause of the Thomas Fire has not been determined. In the event that SCE is determined to have liability for damages caused by the Thomas Fire, SCE cannot predict whether the courts will conclude that the Montecito Mudslides were caused by the Thomas Fire or that SCE is responsible or liable for damages caused by the Montecito Mudslides. As a result, Edison International and SCE are currently unable to reasonably estimate whether SCE will incur material losses and, if so, the range of possible losses that could be incurred. If it is determined that the Montecito Mudslides were caused by the Thomas Fire and that SCE is responsible or liable for damages caused by the Montecito Mudslides, then SCE's insurance coverage for such losses may be limited to its wildfire insurance. Additionally, if SCE is determined to be liable for a significant portion of costs associated with the Montecito Mudslides, SCE's insurance may not be sufficient to cover all such damages and SCE may be unable to recover any uninsured losses.
If it is ultimately determined that SCE is legally responsible for losses caused by the Montecito Mudslides, SCE could be held liable for resulting Property Losses if inverse condemnation is found applicable. If SCE is determined to have been negligent, in addition to Property Losses, SCE could be liable for business interruption losses, evacuation costs, clean-up costs, medical expenses and personal injury/wrongful death claims associated with the Montecito Mudslides. These liabilities, in the aggregate, could be substantial. SCE cannot predict whether it will be subjected to regulatory fines related to the Montecito Mudslides.
Permanent Retirement of San Onofre Related Matters
Replacement steam generators were installed at San Onofre in 2010 and 2011. On January 31, 2012, a leak suddenly occurred in one of the heat transfer tubes in San Onofre's Unit 3 steam generators. The Unit was safely taken off-line and subsequent inspections revealed excessive tube wear. Unit 2 was off-line for a planned outage when areas of unexpected tube wear were also discovered. On June 6, 2013, SCE decided to permanently retire Units 2 and 3.
San Onofre CPUC Proceedings
In November 2014, the CPUC approved the San Onofre OII Settlement Agreement by and among The Utility Reform Network ("TURN"), the CPUC's Office of Ratepayers Advocates ("ORA"), San Diego Gas & Electric ("SDG&E"), the Coalition of California Utility Employees, and Friends of the Earth (the "Prior San Onofre Settlement Agreement"), which, at the time, resolved the CPUC's investigation regarding the steam generator replacement project at San Onofre and the related outages and subsequent shutdown of San Onofre. Subsequently, the San Onofre OIIOrder Instituting Investigation ("OII") proceeding record was reopened by a joint ruling of the Assigned Commissioner and the Assigned ALJadministrative law judge ("ALJ") to consider whether, in light of the Company not reporting certain ex parte communications on a timely basis, the Prior San Onofre OII Settlement Agreement remained reasonable, consistent with the law and in the public interest, which is the standard the CPUC applies in reviewing settlements submitted for approval. In comments filed with
Entry into Revised Settlement and Utility Shareholder Agreements
On January 30, 2018, SCE, SDG&E, The Alliance for Nuclear Responsibility, The California Large Energy Consumers Association, California State University, Citizens Oversight dba Coalition to Decommission San Onofre, the CPUC in July 2016, SCE asserted thatCoalition of California Utility Employees, the Direct Access Customer Coalition, Ruth Henricks, ORA, TURN, and Women's Energy Matters (the "OII Parties") entered into a Revised San Onofre Settlement Agreement continues to meet this standard and therefore should not be disturbed. A number of the parties to the OII, however, have requested that the CPUC either modifyin the San Onofre OII proceeding (the "Revised San Onofre Settlement Agreement"). If approved by the CPUC, the Revised San Onofre Settlement Agreement or vacate its previous approvalwill resolve all issues under consideration in the San Onofre OII and will modify the Prior San Onofre Settlement Agreement. If approved by the CPUC, the Revised San Onofre Settlement Agreement will also result in the dismissal of a federal lawsuit currently pending in the settlement and reinstate9th Circuit Court of Appeals challenging the OII for further proceedings.CPUC's authority to permit rate recovery of San Onofre

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Incosts. The Revised San Onofre Settlement Agreement was the result of multiple mediation sessions in 2017 and January 2018 and was signed on January 30, 2018 following a December 2016 joint ruling, the Assigned Commissioner and the Assigned ALJ expressed concerns about the extent to which the failure to timely report ex parte communications had impacted the settlement negotiations and directed SCE to meet and confer with the other partiesconference in the OII, to consider changingas required under CPUC rules.
Implementation of the terms of the Revised San Onofre Settlement Agreement is subject to the approval of the CPUC, as to which there is no assurance. The OII Parties have agreed to exercise their best efforts to obtain CPUC approval, but there can be no certainty of when or what the CPUC will actually decide.
On February 6, 2018, the San Onofre OII Assigned Commissioner and Assigned ALJ issued a joint ruling advising the parties, among other things, that (i) the CPUC will need additional information and that the parties should be prepared to submit joint testimony in support of the Revised San Onofre Settlement Agreement on March 26, 2018; (ii) there will be public participation hearings and at least one additional status conference; and (iii) another ruling will be issued with further direction.
Disallowances, Refunds and Recoveries
If the Revised San Onofre Settlement Agreement is approved by the CPUC, SCE and SDG&E (the "Utilities") will cease rate recovery of San Onofre costs as of the date their combined remaining San Onofre regulatory assets equal $775 million (the "Cessation Date"). SCE has previously requested the CPUC to authorize SCE to reduce the San Onofre regulatory asset by applying $72 million of proceeds received from litigation with the DOE related to DOE's failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. If that request is approved by the CPUC, the Cessation Date is estimated to be December 19, 2017. If that request is not approved by the CPUC, the Cessation Date is estimated to be April 21, 2018. The Utilities will refund to customers San Onofre-related amounts recovered in rates after the Cessation Date. SCE will retain amounts collected under the Prior San Onofre Settlement Agreement before the Cessation Date. SCE also will retain $47 million of proceeds received in 2017 from arbitration with Mitsubishi Heavy Industries ("MHI") over MHI's delivery of faulty steam generators. In the Revised San Onofre Settlement Agreement, SCE retains the right to sell its stock of nuclear fuel and not share such proceeds with customers, as was provided in the Prior San Onofre Settlement Agreement. SCE intends to sell its nuclear fuel inventory as market conditions warrant. Sales of nuclear fuel may be significant.
Under the Prior San Onofre Settlement Agreement, the Utilities agreed to fund $25 million for a Research, Development and Demonstration program that is intended to develop technologies and methodologies to reduce greenhouse gas emissions ("GHG Reduction Program"). The ruling set out a schedule requiring that at least two meet and confer sessions be held inUtilities' funding obligation is reduced to $12.5 million under the first quarter of 2017 and requiring the parties to submit a joint status report toRevised San Onofre Settlement Agreement.
If approved by the CPUC, by April 28, 2017 ifthe Revised San Onofre Settlement Agreement will also provide certain exclusions from the determination of SCE's ratemaking capital structure. Notwithstanding that SCE will no modifications have been agreedlonger recover its San Onofre regulatory asset, the debt borrowed to by some or allfinance the regulatory asset will continue to be excluded from SCE's ratemaking capital structure. Additionally, SCE may exclude the after-tax charge resulting from the implementation of the partiesRevised San Onofre Settlement Agreement from its ratemaking capital structure.
Accounting and Financial Impacts
Under the Prior San Onofre Settlement Agreement, GAAP required that previously incurred costs related to San Onofre Units 2 & 3 be reflected as a result of the meet and confer process. SCE has recorded a regulatory asset to reflect the expected recoveriesextent that management concluded the costs were probable of recovery through future rates. GAAP also requires that amounts collected that are probable of refund to customers be recorded as regulatory liabilities. In the fourth quarter of 2017, regulatory assets and liabilities were adjusted based on the probable approval of the Revised San Onofre Settlement Agreement.

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In connection with the Revised San Onofre Settlement Agreement, and in exchange for the release of certain San Onofre-related claims, the Utilities entered into an agreement ("Utility Shareholder Agreement") in which SCE has agreed to pay SDG&E the amounts SDG&E would have received in rates under the Prior San Onofre OIISettlement Agreement but will not receive upon implementation of the Revised San Onofre Settlement Agreement. AtAs of December 31, 2016, $85719, 2017, SDG&E's regulatory asset was approximately $151 million. In the fourth quarter of 2017, SCE recorded an accrued liability of $143 million remains to be collected.for the estimated present value of this obligation. The following table summarizes the financial impact of the Revised San Onofre Settlement Agreement and the Utility Shareholder Agreement:
(in millions)


San Onofre base regulatory asset$696
DOE litigation regulatory liability(72)
MHI Arbitration regulatory liability(47)
GHG Reduction Program(10)
Other6
Present value of Utility Shareholder Agreement143
Total pre-tax charge$716
Total after-tax charge$448
Additional Challenges related to the Settlement of San Onofre CPUC Proceedings
A federal lawsuit challenging the CPUC's authority to permit rate recovery of San Onofre costs and an application to the CPUC for rehearing of its decision approving the San Onofre OII Settlement Agreement were filed in November and December 2014, respectively. In April 2015, the federal lawsuit was dismissed with prejudice and the plaintiffs in that case appealed the dismissal to the Ninth Circuit in May 2015. TheIn light of the San Onofre OII meet-and-confer sessions, the Ninth Circuit cancelled the oral argumenthearing that had been scheduled for February 9, 2017 and ordered the parties to notify the Ninth Circuit of the status of the San Onofre OII by May 1, 2017 and periodically thereafter. In October 2017, the Ninth Circuit scheduled a hearing for February 13, 2018 and directed the parties to file a status report on January 30, 2018. As part of the Revised San Onofre Settlement Agreement, the plaintiffs agreed to dismiss this case with prejudice.
In July 2015, a purported securities class action lawsuit was filed in federal court against Edison International, its then Chief Executive Officer and its then Chief Financial Officer. The complaint was later amended to include SCE's former President as a defendant. The lawsuit alleges that the defendants violated the securities laws by failing to disclose that Edison International had ex parte contacts with CPUC decision-makers regarding the San Onofre OII that were either unreported or more extensive than initially reported. The initial complaint purports to be filed on behalf of a class of persons who acquired Edison International common stock between March 21, 2014 and June 24, 2015.2015 (the "Class Period"). In September 2016, the Courtfederal court granted defendants' motion to dismiss the complaint, with an opportunity for plaintiff to amend the complaint. Plaintiff filed an amended complaint, which the federal court dismissed again with an opportunity for the plaintiff to amend the complaint. Plaintiff filed a third amended complaint and defendants again moved to dismiss the complaint in October 2016.
Also in July 2015, a federal shareholder derivative lawsuit was filed against members of the Edison International Board of Directors for breach of fiduciary duty and other claims. The federal derivative lawsuit is based on similar allegations to the federal class action securities lawsuit and seeks monetary damages, including punitive damages, and various corporate governance reforms. An additional federal shareholder derivative lawsuit making essentially the same allegations was filed in August 2015 and was subsequently consolidated with the July 2015 federal derivative lawsuit. In September 2016, the Courtfederal court granted defendants' motion to dismiss the consolidated complaint, with an opportunity for plaintiff to amend the complaint. Plaintiff did not file an amended complaint by the required date. Plaintiffs' deadline to appeal the federal court's order granting defendants' motion to dismiss lapsed in March 2017 and no appeal was filed.
In October 2015, a shareholder derivative lawsuit was filed in California state court against members of the Edison International Board of Directors for breach of fiduciary duty and other claims, making similar allegations to those in the federal derivative lawsuits discussed above. The California state court action is currently on hold inIn light of the pendingruling in the parallel federal suitsderivative lawsuit discussed above.above, plaintiff requested that the court voluntarily dismiss the state court action. The action was dismissed in April 2017.
In November 2015, a purported securities class action lawsuit was filed in federal court against Edison International, its then Chief Executive Officer and its Treasurer by an Edison International employee, alleging claims under the Employee Retirement Income Security Act ("ERISA").Act. The complaint purports to be filed on behalf of a class of Edison International employees who were participants in the Edison 401(k) Savings Plan and invested in the Edison International Stock Fund between March 27, 2014 and June 24, 2015. The complaint alleges that defendants breached their fiduciary duties because they knew

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or should have known that investment in the Edison International Stock Fund was imprudent because the price of Edison International common stock was artificially inflated due to Edison International's alleged failure to disclose certain ex parte communications with CPUC decision-makers related to the San Onofre OII. In July 2016, the federal court granted the defendants' motion to dismiss the lawsuit with an opportunity for the plaintiff to amend her complaint. Plaintiff filed an amended complaint in July 2016, that dismissed Edison International as a named defendant and the remaining defendants filed a motion to dismiss in August 2016. Defendants'These defendants' motion was heard by the court in November 20162016. In June 2017, the federal court again granted defendants' motion to dismiss the lawsuit with an opportunity for the plaintiff to amend her complaint. Plaintiff filed an amended complaint in early July 2017. Defendants have filed motion to dismiss the amended complaint, which was heard by the court in October 2017, and are awaiting a decision is pending.ruling.
Edison International and SCE cannot predict the outcome of these proceedings.
MHI Claims
SCE is also pursuing claims against Mitsubishi Heavy Industries, Ltd. and a related company ("MHI"), which designed and supplied the replacement steam generators. MHI warranted the replacement steam generators for an initial period of 20 years from acceptance and is contractually obligated to repair or replace defective items with dispatch and to pay specified damages for certain repairs. MHI's stated liability under the purchase agreement is limited to $138 million and excludes consequential damages, defined to include "the cost of replacement power;" however, limitations in the contract are subject to applicable exceptions both in the contract and under law. SCE has advised MHI that it believes one or more of such exceptions apply and

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that MHI's liability is not limited to $138 million. MHI has advised SCE that it disagrees. In October 2013, SCE sent MHI a formal request for binding arbitration under the auspices of the International Chamber of Commerce in accordance with the purchase contract seeking damages for all losses. In the request for arbitration, SCE alleges contract and tort claims and seeks at least $4 billion in damages on behalf of itself and its customers and in its capacity as Operating Agent for San Onofre. MHI has denied any liability and has asserted counterclaims for $41 million, for which SCE has denied any liability. Each of the other San Onofre owners sued MHI, alleging claims arising from MHI's supplying the faulty steam generators. These litigation claims have been stayed pending the arbitration. The other co-owners (San Diego Gas & Electric and Riverside) have been added as additional claimants in the arbitration. The arbitration is being conducted pursuant to a confidentiality order issued by the arbitration panel. Hearings concluded on April 29, 2016. A decision is expected to be issued in the first quarter of 2017.
SCE, on behalf of itself and the other San Onofre co-owners, has submitted seven invoices to MHI totaling $149 million for steam generator repair costs incurred through April 30, 2013. MHI paid the first invoice of $45 million, while reserving its right to challenge it and subsequently rejected a portion of the first invoice and has not paid further invoices, claiming further documentation is required, which SCE disputes. SCE recorded its share of the invoice paid (approximately $35 million) as a reduction of repair and inspection costs in 2012.
Under the San Onofre OII Settlement Agreement, recoveries from MHI (including amounts paid by MHI under the first invoice), if any, will first be applied to reimburse costs incurred in pursuing such recoveries, including litigation costs. To the extent SCE's share of recoveries from MHI exceed such costs, they will be allocated 50% to customers and 50% to SCE.
The first $282 million of SCE's customers' portion of such recoveries from MHI will be distributed to customers via a credit to a sub-account of SCE's BRRBA, reducing revenue requirements from customers. Amounts in excess of the first $282 million distributable to SCE customers will reduce SCE's regulatory asset represented by the unamortized balance of investment in San Onofre base plant, reducing the revenue requirement needed to amortize such investment. The amortization period, however, will be unaffected. Any additional amounts received after the regulatory asset is recovered will be applied to the BRRBA.
The San Onofre OII Settlement Agreement provides the utilities with the discretion to resolve the MHI dispute without CPUC approval, but the utilities are obligated to use their best efforts to inform the CPUC of any settlement or other resolution of these disputes to the extent this is possible without compromising any aspect of the resolution. SCE and SDG&E have also agreed to allow the CPUC to review the documentation of any final resolution of the MHI dispute and the litigation costs incurred in pursuing claims against MHI to ensure they are not exorbitant in relation to the recovery obtained. There is no assurance that there will be any recovery from MHI or that, if there is a recovery, it will equal or exceed the litigation costs incurred to pursue the recovery.
Long Beach Service Interruptions
In July 2015, SCE's customers who are served via the network portion of SCE's electric system in Long Beach, California experienced service interruptions due to multiple underground vault fires and underground cable failures. No personal injuries were reported in connection with these events. SCE expects to incur penalties as a result of these events. Although resolution will be subject to settlement discussions with SED and CPUC review and approval, SCE has recorded a liability for the estimated loss.
Environmental Remediation
SCE records its environmental remediation liabilities when site assessments and/or remedial actions are probable and a range of reasonably likely cleanup costs can be estimated. SCE reviews its sites and measures the liability quarterly, by assessing a range of reasonably likely costs for each identified site using currently available information, including existing technology, presently enacted laws and regulations, experience gained at similar sites, and the probable level of involvement and financial condition of other potentially responsible parties. These estimates include costs for site investigations, remediation, operation and maintenance, monitoring and site closure. Unless there is a single probable amount, SCE records the lower end of this reasonably likely range of costs (reflected in "Other long-term liabilities") at undiscounted amounts as timing of cash flows is uncertain.
At December 31, 2016,2017, SCE's recorded estimated minimum liability to remediate its 1920 identified material sites (sites with a liability balance as of December 31, 2016,2017, in which the upper end of the range of the costs is at least $1 million) was $128$146 million, including $77$93 million related to San Onofre. In addition to these sites, SCE also has 1816 immaterial sites with a liability balance at December 31, 20162017 for which the total minimum recorded liability was $3$4 million. Of the $131$150 million total environmental remediation liability for SCE, $126$144 million has been recorded as a regulatory asset. SCE expects to recover $46$49 million through an incentive mechanism that allows SCE to recover 90% of its environmental remediation costs at certain sites (SCE may request to include additional sites) and $80$95 million through a mechanism that allows SCE to recover 100% of the costs incurred at certain sites through customer rates. SCE's identified sites include several sites for which there is

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a lack of currently available information, including the nature and magnitude of contamination, and the extent, if any, that SCE may be held responsible for contributing to any costs incurred for remediating these sites. Thus, no reasonable estimate of cleanup costs can be made for these sites.
The ultimate costs to clean up SCE's identified sites may vary from its recorded liability due to numerous uncertainties inherent in the estimation process, such as: the extent and nature of contamination; the scarcity of reliable data for identified sites; the varying costs of alternative cleanup methods; developments resulting from investigatory studies; the possibility of identifying additional sites; and the time periods over which site remediation is expected to occur. SCE believes that, due to these uncertainties, it is reasonably possible that cleanup costs at the identified material sites and immaterial sites could exceed its recorded liability by up to $168$129 million and $8 million, respectively. The upper limit of this range of costs was estimated using assumptions least favorable to SCE among a range of reasonably possible outcomes.
SCE expects to clean up and mitigate its identified sites over a period of up to 30 years. Remediation costs for each of the next four4 years are expected to range from $8$5 million to $20$21 million. Costs incurred for years ended December 31, 2017, 2016 and 2015 and 2014 were $9 million, $4 million $5 million and $4$5 million, respectively.
Based upon the CPUC's regulatory treatment of environmental remediation costs incurred at SCE, SCE believes that costs ultimately recorded will not materially affect its results of operations, financial position or cash flows. There can be no assurance, however, that future developments, including additional information about existing sites or the identification of new sites, will not require material revisions to estimates.
Nuclear Insurance
Federal law limits public offsite liability claims for bodily injury and property damage from a nuclear incident to the amount of available financial protection, which is currently approximately $13.4 billion. As of January 1, 2017, SCE and other owners of San Onofre and Palo Verde have purchased the maximum private primary insurance available ($450 million) through a Facility Form issued by American Nuclear Insurers ("ANI"). The balance is covered by a loss sharing program among nuclear reactor licensees. If a nuclear incident at any licensed reactor in the United States results in claims and/or costs which exceed the primary insurance at that plant site, all nuclear reactor licensees could be required to contribute their share of the liability in the form of a deferred premium.

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The ANI Facility Form coverage includes broad liability protection for bodily injury or offsite property damage caused by the nuclear energy hazard at San Onofre, or while in transit to or from San Onofre. The Facility Form, however, includes several exclusions. First, it excludes onsite property damage to the nuclear facility itself and onsite cleanup costs, but as discussed below SCE maintains separate NEILNuclear Electric Insurance Limited ("NEIL") property damage coverage for such events. Second, tort claims of onsite workers are excluded, but SCE also maintains an ANI Master Worker Form policy that provides coverage for non-licensee workers. This program provides a shared industry aggregate limit of $450 million. Industry losses covered by this program could reduce limits available to SCE. Third, offsite environmental costs arising out of government orders or directives, including those issued under the Comprehensive Environmental Response, Compensation and Liability Act, also known as CERCLA, are excluded, with minor exceptions from clearly identifiable accidents.
Based on its ownership interests, SCE could be required to pay a maximum of approximately $255 million per nuclear incident. However, it would have to pay no more than approximately $38 million per incident in any one year. If the public liability limit above is insufficient, federal law contemplates that additional funds may be appropriated by Congress. This could include an additional assessment on all licensed reactor operators as a measure for raising further federal revenue.
NEIL, a mutual insurance company owned by entities with nuclear facilities, issues nuclear property damage and accidental outage insurance policies. The amount of nuclear property insurance purchased for San Onofre and Palo Verde exceeds the minimum federal requirement of $1.06 billion. These policies include coverage for decontamination liability. Property damage insurance also covers damages caused by acts of terrorism up to specified limits. Additional outage insurance covers part of replacement power expenses during an accident-related nuclear unit outage. The accidental outage insurance at San Onofre has been canceled as a result of the permanent retirement, but that insurance continues to be in effect at Palo Verde.
If losses at any nuclear facility covered by the arrangement were to exceed the accumulated funds for these insurance programs, SCE could be assessed retrospective premium adjustments of up to approximately $52 million per year. Insurance premiums are charged to operating expense.

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Wildfire Insurance
Severe wildfires in California have given rise to large damage claims against California utilities for fire-related losses alleged to be the result of the failure of electric and other utility equipment. Invoking a California Court of Appeal decision, plaintiffs pursuing these claims have relied on the doctrine of inverse condemnation, which can impose strict liability (including liability for a claimant's attorneys' fees) for property damage. Drought conditions in California have also increased the duration of the wildfire season and the risk of severe wildfire events. SCE has approximately $1 billion of insurance coverage for wildfire liabilities for the period ending on May 31, 2017. SCE has a self-insured retention of $10 million per wildfire occurrence. SCE or its contractors may experience coverage reductions and/or increased insurance costs in future years. No assurance can be given that future losses will not exceed the limits of SCE's or its contractors' insurance coverage.
Spent Nuclear Fuel
Under federal law, the 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 has not met its contractual obligation to accept spent nuclear fuel. Extended delays by the DOE have led to the construction of costly alternatives and associated siting and environmental issues. Currently, both San Onofre and Palo Verde have interim storage for spent nuclear fuel on site sufficient for their current license period.
In June 2010, the United States Court of Federal Claims issued a decision granting SCE and the San Onofre co-owners damages of approximately $142 million (SCE share $112 million) to recover costs incurred through December 31, 2005 for the DOE's failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. SCE received payment from the federal government in the amount of the damage award. In April 2016, SCE, as operating agent, settled a lawsuit on behalf of the San Onofre owners against the DOE for $162 million, including reimbursement for legal costs (SCE share $124 million) to compensate for damages caused by the DOE's failure to meet its obligation to begin accepting spent nuclear fuel for the period from January 1, 2006 to December 31, 2013. The settlement also provides for a claim submission/audit process for expenses incurred from 2014 – 2016, where SCE will submit a claim for damages caused by the DOE failure to accept spent nuclear fuel each year, followed by a government audit and payment of the claim. This process will make additional legal action to recover damages incurred in 2014 – 2016 unnecessary. The first such claim covering damages for 2014 – 2015 was filed on September 30, 2016 for approximately $56 million. In February 2017, the DOE reviewed the
2014 – 2015 claim submission and reduced the original request to approximately $43 million (SCE share was approximately $34 million) primarily due to DOE allocation limits. SCE has 30 days to review and acceptaccepted the DOE's determination.determination, and the government paid the 2014 – 2015 claim under the terms of the settlement. In October 2017, SCE will make thefiled a claim submissioncovering damages for 2016 damages in the third quarter of 2017.for approximately $59 million. All damages recovered by SCE are subject to CPUC review as to how these amounts would be distributed among customers, shareholders, or to offset fuel decommissioning or storage costs.
Note 12.    Preferred and Preference Stock of Utility
SCE's authorized shares are: $100 cumulative preferred – 12 million shares, $25 cumulative preferred – 24 million shares and preference with no par value – 50 million shares. SCE's outstanding shares are not subject to mandatory redemption. There are no dividends in arrears for the preferred or preference shares. Shares of SCE's preferred stock have liquidation and dividend preferences over shares of SCE's common stock and preference stock. All cumulative preferred shares are redeemable. When preferred shares are redeemed, the premiums paid, if any, are charged to common equity. No preferred shares were issued or redeemed in the years ended December 31, 2017, 2016, 2015 and 2014.2015. There is no sinking fund requirement for redemptions or repurchases of preferred shares.

105




Shares of SCE's preference stock rank junior to all of the preferred stock and senior to all common stock. Shares of SCE's preference stock are not convertible into shares of any other class or series of SCE's capital stock or any other security. There is no sinking fund requirement for redemptions or repurchases of preference shares.

98




Preferred stock and preference stock is:
Shares
Outstanding
 Redemption
Price
 December 31,Shares
Outstanding
 Redemption
Price
 December 31,
(in millions, except shares and per-share amounts) 2016 2015 2017 2016
Cumulative preferred stock              
$25 par value:              
4.08% Series650,000
 $25.50
 $16
 $16
650,000
 $25.50
 $16
 $16
4.24% Series1,200,000
 25.80
 30
 30
1,200,000
 25.80
 30
 30
4.32% Series1,653,429
 28.75
 41
 41
1,653,429
 28.75
 41
 41
4.78% Series1,296,769
 25.80
 33
 33
1,296,769
 25.80
 33
 33
Preference stock              
No par value:              
6.50% Series D (cumulative)1,250,000
 100.00
 
 125
6.25% Series E (cumulative)350,000
 1,000.00
 350
 350
350,000
 1,000.00
 350
 350
5.625% Series F (cumulative)190,004
 2,500.00
 475
 475
190,004
 2,500.00
 
 475
5.10% Series G (cumulative)160,004
 2,500.00
 400
 400
160,004
 2,500.00
 400
 400
5.75% Series H (cumulative)110,004
 2,500.00
 275
 275
110,004
 2,500.00
 275
 275
5.375% Series J (cumulative)130,004
 2,500.00
 325
 325
130,004
 2,500.00
 325
 325
5.45% Series K (cumulative)120,004
 2,500.00
 300
 
120,004
 2,500.00
 300
 300
5.00% Series L (cumulative)190,004
 2,500.00
 475
 
SCE's preferred and preference stock    2,245
 2,070
    2,245
 2,245
Less issuance costs    (54) (50)    (52) (54)
Edison International's preferred and preference stock of utility 
  
 $2,191
 $2,020
 
  
 $2,193
 $2,191
Shares of Series E preference stock issued in 2012 may be redeemed at par, in whole or in part, on or after February 1, 2022. Shares of Series F, G, H, J, K and KL preference stock, issued in 2012, 2013, 2014, 2015, 2016 and 2016,2017, respectively, may be redeemed at par, in whole, but not in part, at any time prior to June 15, 2017, March 15, 2018, March 15, 2024, September 15, 2025, and March 15, 2026 and June 26, 2022, respectively, if certain changes in tax or investment company laws occur.law or interpretation (or applicable rating agency equity credit criteria for Series L only) occur and certain other conditions are satisfied. On or after June 15, 2017, March 15, 2018, March 15, 2024, September 15, 2025, and March 15, 2026 and June 26, 2022, SCE may redeem the Series F, G, H, J, K and KL shares, respectively, at par, in whole or in part. For shares of Series H, J and K preference stock, distributions will accrue and be payable at a floating rate from and including March 15, 2024, September 15, 2025 and March 15, 2026, respectively. Shares of Series F, G, H, J, K and KL preference stock were issued to SCE Trust I, SCE Trust II, SCE Trust III, SCE Trust IV, SCE Trust V and SCE Trust V,VI, respectively, special purpose entities formed to issue trust securities as discussed in Note 3. The proceeds from the sale of the shares of Series KL were used to redeem $125$475 million of the Company's Series DF preference stock and for general corporate purposes.stock. Preference shares are not subject to mandatory redemption.
At December 31, 2016,2017, declared and unpaid dividends related to SCE's preferred and preference stock were $12 million.

106




Note 13.    Accumulated Other Comprehensive Loss
The changes in accumulated other comprehensive loss, net of tax, consist of:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2016 20152017 2016 2017 2016
Beginning balance$(56) $(58) $(22) $(28)$(53) $(56) $(20) $(22)
Pension and PBOP – net gain (loss):              
Other comprehensive (loss) income before reclassifications(4) (8) (2) 1
Other comprehensive income (loss) before reclassifications3
 (4) (2) (2)
Reclassified from accumulated other comprehensive loss1
6
 10
 3
 5
7
 6
 3
 3
Other1
 
 1
 

 1
 
 1
Change3

2
 2
 6
10

3
 1
 2
Ending balance$(53) $(56) $(20) $(22)$(43) $(53) $(19) $(20)
1 
These items are included in the computation of net periodic pension and PBOP expense.expenses. See Note 8 for additional information.

99




Note 14.    Interest and Other Income and Other Expenses
Interest and other income and other expenses are as follows:
 Years ended December 31, Years ended December 31,
(in millions) 2016 2015 2014 2017 2016 2015
SCE interest and other income:            
Equity allowance for funds used during construction $74
 $87
 $65
 $87
 $74
 $87
Increase in cash surrender value of life insurance policies and life insurance benefits 39
 26
 36
 42
 39
 26
Interest income 3
 4
 5
 7
 3
 4
Other 7
 6
 16
 9
 7
 6
Total SCE interest and other income 123
 123
 122
 145
 123
 123
Other income of Edison International Parent and Other1
 
 51
 25
 1
 
 51
Total Edison International interest and other income $123
 $174
 $147
 $146
 $123
 $174
SCE other expenses:            
Civic, political and related activities and donations $(32) $(35) $(35) $(34) $(32) $(35)
Other (12) (24) (44) (14) (12) (24)
Total SCE other expenses (44) (59) (79) (48) (44) (59)
Other expense of Edison International Parent and Other 
 
 (1)
Other expenses of Edison International Parent and Other (3) 
 
Total Edison International other expenses $(44) $(59) $(80) $(51) $(44) $(59)
1 Reflects Edison Capital's income related to the sale of affordable housing projects for the year ended December 31, 2015.

Note 15.    Discontinued Operations
EME Chapter 11 Bankruptcy
In December 2012, EME and certain of its wholly-owned subsidiaries filed voluntary petitions for relief under Chapter 11 of the U.S. Bankruptcy Code in the U.S. Bankruptcy Court for the Northern District of Illinois, Eastern Division. The Amended Plan of Reorganization, including the EME Settlement Agreement, was completed on April 1, 2014 with the sale of substantially all of EME's assets to NRG Energy, Inc. and the transactions called for in the EME Settlement Agreement, including an initial cash payment to the Reorganization Trust of $225 million in April 2014.
In August 2014, Edison International entered into an amendment of the EME Settlement Agreement that finalized the remaining matters related to the EME Settlement including setting the amount of the two installment payments. Edison International made an installment payment of $204 million in September 2015 and made the remaining $214 million payment in September 2016.
Income from discontinued operations, net of tax, was $12 million (pre-tax income of $1 million), $35 million (pre-tax income of $15 million) and $185 million (pre-tax loss of $525 million) for the years ended December 31, 2016, 2015 and 2014, respectively. The 2016 and 2015 income was primarily related to the resolution of tax issues related to EME. The 2015 income also included insurance recoveries. Results from discontinued operations in 2014 consisted of a pre-tax loss of $525 million primarily related to liabilities assumed in connection with the EME Settlement Agreement, including the payments to the Reorganization Trust discussed above, and income tax benefits of $710 million related to the EME net operating loss and other credit carryforwards.

100107




Note 16.15.    Supplemental Cash Flows Information
Supplemental cash flows information for continuing operations is:
Edison International SCEEdison International SCE
Years ended December 31,Years ended December 31,
(in millions)2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Cash payments (receipts) for interest and taxes:           
Cash payments for interest and taxes:           
Interest, net of amounts capitalized$504
 $512
 $504
 $475
 $478
 $487
$548
 $504
 $512
 $509
 $475
 $478
Tax payments (refunds), net18
 1
 32
 78
 144
 (88)
Tax payments, net of refunds1
 18
 1
 2
 78
 144
Non-cash financing and investing activities:                      
Dividends declared but not paid:                      
Common stock$177
 $156
 $136
 $
 $
 $147
$197
 $177
 $156
 $212
 $
 $
Preferred and preference stock12
 14
 18
 12
 14
 18
12
 12
 14
 12
 12
 14
Details of debt exchange:                      
Pollution-control bonds redeemed (2.875%)
 (203) 
 
 (203) 

 
 (203) 
 
 (203)
Pollution-control bonds issued (1.875%)
 203
 
 
 203
 

 
 203
 
 
 203
Notes issued under EME Settlement Agreement$
 $
 $418
 $
 $
 $
SCE's accrued capital expenditures at December 31, 2017, 2016, 2015 and 20142015 were $540$652 million, $543540 million, and $837543 million, respectively. Accrued capital expenditures will be included as an investing activity in the consolidated statements of cash flow in the period paid.
During 2015, SCE amended a power contract classified as a capital lease, which resulted in a reduction in the lease obligation and asset by $147 million.
Note 17.16.    Related-Party Transactions
Edison International and SCE provide and receive various services to and from its subsidiaries and affiliates. Services provided to Edison International by SCE are priced at fully loaded cost (i.e., direct cost of good or service and allocation of overhead cost). Specified administrative services such as payroll, employee benefit programs, all performed by Edison International or SCE employees, are shared among all affiliates of Edison International. Costs are allocated based on one of the following formulas: percentage of time worked, equity in investment and advances, number of employees, or multi-factor (operating revenues,revenue, operating expenses, total assets and number of employees). Edison International allocates various corporate administrative and general costs to SCE and other subsidiaries using established allocation factors.


101108




Note 18.17.    Quarterly Financial Data (Unaudited)
Edison International's quarterly financial data is as follows:
 2016
(in millions, except per-share amounts)Total Fourth Third Second First
Operating revenue$11,869
 $2,884
 $3,767
 $2,777
 $2,440
Operating income2,092
 566
 695
 381
 448
Income from continuing operations1
1,413
 347
 451
 310
 305
Income (loss) from discontinued operations, net12
 13
 
 (2) 1
Net income attributable to common shareholders1
1,311
 329
 421
 280
 281
Basic earnings (loss) per share1:
         
  Continuing operations$3.99
 $0.97
 $1.29
 $0.87
 $0.86
  Discontinued operations0.03
 0.04
 
 (0.01) 
Total$4.02
 $1.01
 $1.29
 $0.86
 $0.86
Diluted earnings (loss) per share1:
         
  Continuing operations$3.94
 $0.96
 $1.27
 $0.86
 $0.85
  Discontinued operations0.03
 0.04
 
 (0.01) 
Total$3.97
 $1.00
 $1.27
 $0.85
 $0.85
Dividends declared per share1.9825
 0.5425
 0.4800
 0.4800
 0.4800
Common stock prices:         
High$78.72
 $73.81
 $78.72
 $77.71
 $72.34
Low57.97
 67.44
 71.31
 67.71
 57.97
Close71.99
 71.99
 72.25
 77.67
 71.89
1
Edison International adopted an accounting standard related to share-based payments during the fourth quarter of 2016, effective January 1, 2016. See Note 1 for further information. The table above reflects the adoption of this standard on January 1, 2016. Net income from continuing operations, as previously reported, was $449 million for the third quarter of 2016, $306 million for the second quarter of 2016 and $295 million for the first quarter of 2016. Net income attributable to common shareholders, as previously reported, was $419 million for the third quarter of 2016, $276 million for the second quarter of 2016 and $271 million for the first quarter of 2016. Basic EPS for continuing operations, as previously reported, was $1.29 for the third quarter of 2016, $0.86 for the second quarter of 2016 and $0.83 for the first quarter of 2016. Diluted EPS for continuing operations, as previously reported, was $1.27 for the third quarter of 2016, $0.85 for the second quarter of 2016 and $0.82 for the first quarter of 2016.

102




20152017
(in millions, except per-share amounts)Total Fourth Third Second FirstTotal Fourth Third Second First
Operating revenue$11,524
 $2,341
 $3,763
 $2,908
 $2,512
$12,320
 $3,220
 $3,672
 $2,965
 $2,463
Operating income2,008
 340
 608
 524
 538
Income (loss) from continuing operations1
1,082
 (47) 405
 406
 318
Operating income (loss)1,493
 (16) 561
 469
 479
Income (loss) from continuing operations1,2
668
 (534) 501
 309
 392
Income (loss) from discontinued operations, net35
 (8) 43
 
 

 
 
 
 
Net income (loss) attributable to common shareholders1,020
 (79) 421
 379
 299
565
 (545) 470
 278
 362
Basic earnings (loss) per share:                  
Continuing operations$3.02
 $(0.22) $1.16
 $1.16
 $0.92
$1.73
 $(1.67) $1.44
 $0.85
 $1.11
Discontinued operations0.11
 (0.02) 0.13
 
 

 
 
 
 
Total$3.13
 $(0.24) $1.29
 $1.16
 $0.92
$1.73
 $(1.67) $1.44
 $0.85
 $1.11
Diluted earnings (loss) per share:                  
Continuing operations$2.99
 $(0.22) $1.15
 $1.15
 $0.91
$1.72
 $(1.66) $1.43
 $0.85
 $1.10
Discontinued operations0.11
 (0.02) 0.13
 
 

 
 
 
 
Total$3.10
 $(0.24) $1.28
 $1.15
 $0.91
$1.72
 $(1.66) $1.43
 $0.85
 $1.10
Dividends declared per share1.7325
 0.4800
 0.4175
 0.4175
 0.4175
2.2325
 0.6050
 0.5425
 0.5425
 0.5425
Common stock prices:                  
High$69.59
 $66.29
 $63.18
 $64.55
 $69.59
$83.38
 $83.38
 $81.58
 $82.82
 $81.33
Low55.18
 57.51
 55.52
 55.18
 61.02
62.67
 62.67
 76.38
 77.21
 70.57
Close59.21
 59.21
 63.07
 55.58
 62.47
63.24
 63.24
 77.17
 78.19
 79.61
1  
In the fourth quarter of 2015,2017, Edison International Parent and Other recorded a charge of $433 million related to the re-measurement of deferred taxes as a result of Tax Reform.
2
In the 2015 GRC Decision,fourth quarter of 2017, SCE recorded a $382impairment and other charges of $716 million write-down of regulatory assets previously recorded for recovery of deferred income taxes from 2012 – 2014 incremental tax repair deductions.($448 million after-tax) related to the Revised San Onofre Settlement Agreement.
 2016
(in millions, except per-share amounts)Total Fourth Third Second First
Operating revenue$11,869
 $2,884
 $3,767
 $2,777
 $2,440
Operating income2,092
 566
 695
 381
 448
Income from continuing operations1,413
 347
 451
 310
 305
Income (loss) from discontinued operations, net12
 13
 
 (2) 1
Net income attributable to common shareholders1,311
 329
 421
 280
 281
Basic earnings (loss) per share:         
  Continuing operations$3.99
 $0.97
 $1.29
 $0.87
 $0.86
  Discontinued operations0.03
 0.04
 
 (0.01) 
Total$4.02
 $1.01
 $1.29
 $0.86
 $0.86
Diluted earnings (loss) per share:         
  Continuing operations$3.94
 $0.96
 $1.27
 $0.86
 $0.85
  Discontinued operations0.03
 0.04
 
 (0.01) 
Total$3.97
 $1.00
 $1.27
 $0.85
 $0.85
Dividends declared per share1.9825
 0.5425
 0.4800
 0.4800
 0.4800
Common stock prices:         
High$78.72
 $73.81
 $78.72
 $77.71
 $72.34
Low57.97
 67.44
 71.31
 67.71
 57.97
Close71.99
 71.99
 72.25
 77.67
 71.89

109




SCE's quarterly financial data is as follows:
20162017
(in millions)Total Fourth Third Second FirstTotal Fourth Third Second First
Operating revenue$11,830
 $2,874
 $3,752
 $2,768
 $2,435
$12,254
 $3,193
 $3,652
 $2,953
 $2,456
Operating income2,217
 594
 721
 429
 472
Net income1
1,499
 359
 466
 349
 325
Net income available for common stock1
1,376
 328
 435
 318
 295
Operating income (loss)1,598
 (4) 578
 517
 507
Net income (loss)1
1,136
 (79) 497
 338
 380
Net income (loss) available for common stock1,012
 (109) 465
 307
 349
Common dividends declared701
 191
 170
 170
 170
785
 212
 191
 191
 191
1  
SCE adopted an accounting standard related to share-based payments during the fourth quarter of 2016, effective January 1, 2016. See Note 1 for further information. The table above reflects the adoption of this standard on January 1, 2016. Net income, as previously reported, was $466 million for the third quarter of 2016, $346 million for the second quarter of 2016 and $317 million for the first quarter of 2016. Net income available for common stock, as previously reported, was $435 million for the third quarter of 2016, $315 million for the second quarter of 2016 and $287 million for the first quarter of 2016.
 2015
(in millions)Total Fourth Third Second First
Operating revenue$11,485
 $2,319
 $3,757
 $2,901
 $2,508
Operating income2,080
 366
 626
 536
 550
Net income1
1,111
 (51) 417
 412
 333
Net income available for common stock998
 (80) 389
 384
 305
Common dividends declared611
 170
 147
 147
 147
1
In the fourth quarter of 2015, as result of the 2015 GRC Decision,2017, SCE recorded a $382impairment and other charges of $716 million write-down of regulatory assets previously recorded for recovery of deferred income taxes from 2012 – 2014 incremental tax repair deductions.($448 million after-tax) related to the Revised San Onofre Settlement Agreement.
 2016
(in millions)Total Fourth Third Second First
Operating revenue$11,830
 $2,874
 $3,752
 $2,768
 $2,435
Operating income2,217
 594
 721
 429
 472
Net income1,499
 359
 466
 349
 325
Net income available for common stock1,376
 328
 435
 318
 295
Common dividends declared701
 191
 170
 170
 170
Due to the seasonal nature of Edison International and SCE's business, a significant amount of revenue and earnings are recorded in the third quarter of each year. As a result of rounding, the total of the four quarters does not always equal the amount for the year.

103110




SELECTED FINANCIAL DATA
Selected Financial Data: 20122013 – 20162017
(in millions, except per-share amounts)2016 2015 2014 2013 20122017 2016 2015 2014 2013
Edison International                  
Operating revenue$11,869
 $11,524
 $13,413
 $12,581
 $11,862
$12,320
 $11,869
 $11,524
 $13,413
 $12,581
Operating expenses9,777
 9,516
 10,941
 10,866
 9,577
10,827
 9,777
 9,516
 10,941
 10,866
Income from continuing operations1,413
 1,082
 1,536
 979
 1,594
668
 1,413
 1,082
 1,536
 979
Income (loss) from discontinued operations, net of tax12
 35
 185
 36
 (1,686)
Net income (loss)1,425
 1,117
 1,721
 1,015
 (92)
Net income (loss) attributable to common shareholders1,311
 1,020
 1,612
 915
 (183)
Weighted-average shares of common stock outstanding (in millions)326
 326
 326
 326
 326
Income from discontinued operations, net of tax
 12
 35
 185
 36
Net income668
 1,425
 1,117
 1,721
 1,015
Net income attributable to common shareholders565
 1,311
 1,020
 1,612
 915
Weighted-average shares of common stock outstanding326
 326
 326
 326
 326
Basic earnings (loss) per share:                  
Continuing operations$3.99
 $3.02
 $4.38
 $2.70
 $4.61
$1.73
 $3.99
 $3.02
 $4.38
 $2.70
Discontinued operations0.03
 0.11
 0.57
 0.11
 (5.17)
 0.03
 0.11
 0.57
 0.11
Total$4.02
 $3.13
 $4.95
 $2.81
 $(0.56)$1.73
 $4.02
 $3.13
 $4.95
 $2.81
Diluted earnings (loss) per share:         
Diluted earnings per share:         
Continuing operations$3.94
 $2.99
 $4.33
 $2.67
 $4.55
$1.72
 $3.94
 $2.99
 $4.33
 $2.67
Discontinued operations0.03
 0.11
 0.56
 0.11
 (5.11)
 0.03
 0.11
 0.56
 0.11
Total$3.97
 $3.10
 $4.89
 $2.78
 $(0.56)$1.72
 $3.97
 $3.10
 $4.89
 $2.78
Dividends declared per share1.9825
 1.7325
 1.4825
 1.3675
 1.3125
2.2325
 1.9825
 1.7325
 1.4825
 1.3675
Total assets1, 2
$51,319
 $50,229
 $49,734
 $46,225
 $44,394
$52,580
 $51,319
 $50,229
 $49,734
 $46,225
Long-term debt excluding current portion10,175
 10,883
 10,234
 9,825
 9,231
11,642
 10,175
 10,883
 10,234
 9,825
Capital lease obligations excluding current portion6
 7
 196
 203
 210
10
 6
 7
 196
 203
Preferred and preference stock of utility2,191
 2,020
 2,022
 1,753
 1,759
2,193
 2,191
 2,020
 2,022
 1,753
Common shareholders' equity11,996
 11,368
 10,960
 9,938
 9,432
11,671
 11,996
 11,368
 10,960
 9,938
Southern California Edison Company                  
Operating revenue$11,830
 $11,485
 $13,380
 $12,562
 $11,851
$12,254
 $11,830
 $11,485
 $13,380
 $12,562
Operating expenses9,613
 9,405
 10,851
 10,811
 9,572
10,656
 9,613
 9,405
 10,851
 10,811
Net income1,499
 1,111
 1,565
 1,000
 1,660
1,136
 1,499
 1,111
 1,565
 1,000
Net income available for common stock1,376
 998
 1,453
 900
 1,569
1,012
 1,376
 998
 1,453
 900
Total assets2
$50,891
 $49,795
 $49,456
 $45,786
 $44,034
$51,515
 $50,891
 $49,795
 $49,456
 $45,786
Long-term debt excluding current portion9,754
 10,460
 9,624
 9,422
 8,828
10,428
 9,754
 10,460
 9,624
 9,422
Capital lease obligations excluding current portion6
 7
 196
 203
 210
10
 6
 7
 196
 203
Preferred and preference stock2,245
 2,070
 2,070
 1,795
 1,795
2,245
 2,245
 2,070
 2,070
 1,795
Common shareholder's equity12,238
 11,602
 11,212
 10,343
 9,948
12,427
 12,238
 11,602
 11,212
 10,343
Capital structure3:
     
  
  
     
  
  
Common shareholder's equity50.5% 48.1% 49.0% 48.0% 48.4%49.5% 50.5% 48.1% 49.0% 48.0%
Preferred and preference stock9.3% 8.6% 9.0% 8.3% 8.7%9.0% 9.3% 8.6% 9.0% 8.3%
Long-term debt40.2% 43.3% 42.0% 43.7% 42.9%41.5% 40.2% 43.3% 42.0% 43.7%
1
Total assets includes assets from continuing and discontinued operations.
2
Effective December 31, 2015, Edison International and SCE adopted an accounting standard, retrospectively, that requires all deferred income tax assets and liabilities be presented as noncurrent in the consolidated balance sheet.
3 This capital structure is based on the financial statements as reported under generally accepted accounting principles and does not factor in the adjustments required to calculate CPUC ratemaking capital structure.

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The selected financial data was derived from Edison International's and SCE's audited financial statements and is qualified in its entirety by the more detailed information and financial statements, including notes to these financial statements, included in this annual report. References to Edison International refer to the consolidated group of Edison International and its subsidiaries.
CONTROLS AND PROCEDURES
Disclosure Controls and Procedures
Based on an evaluation of Edison International's and SCE's disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), as of December 31, 2016,2017, Edison International's and SCE's respective principal executive officers and principal financial officers have concluded that such controls and procedures are effective to ensure that information required to be disclosed by Edison International and SCE in reports that the companies file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC rules and forms. In addition, Edison International's and SCE's respective principal executive officers and principal financial officers have concluded that such controls and procedures were effective in ensuring that information required to be disclosed by Edison International and SCE in the reports that Edison International and SCE file or submit under the Exchange Act is accumulated and communicated to Edison International's and SCE's management, including Edison International's and SCE's respective principal executive officers and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.
Management's Report on Internal Control Over Financial Reporting
Edison International's and SCE's respective management are responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f), for Edison International and its subsidiaries and SCE, respectively. Under the supervision and with the participation of their respective principal executive officer and principal financial officer, Edison International's and SCE's management conducted an evaluation of the effectiveness of their respective internal controls over financial reporting based on the framework set forth in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on their evaluations under the COSO framework, Edison International's and SCE's respective management concluded that Edison International's and SCE's respective internal controls over financial reporting were effective as of December 31, 2016.2017. Edison International's internal control over financial reporting as of December 31, 20162017 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report on the financial statements included in this report, which is incorporated herein by this reference. This annual report does not include an attestation report of SCE's independent registered public accounting firm regarding internal control over financial reporting. Management's report for SCE is not subject to attestation by the independent registered public accounting firm.
Changes in Internal Control Over Financial Reporting
There were no changes in Edison International's or SCE's internal control over financial reporting during the fourth quarter of 20162017 that have materially affected, or are reasonably likely to materially affect, Edison International's or SCE's internal control over financial reporting.
Jointly Owned Utility Plant
Edison International's and SCE's respective scope of evaluation of internal control over financial reporting includes their Jointly Owned Utility Projects.
OTHER INFORMATION
None.
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
None.

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BUSINESS
CORPORATE STRUCTURE, INDUSTRY AND OTHER INFORMATION
Edison International was incorporated in 1987 as the parent holding company of SCE, a California public utility. Edison International also owns and holds interests in subsidiaries through the Edison Energy Group that are engaged in competitive businesses.
The principal executive offices of Edison International and SCE are located at 2244 Walnut Grove Avenue, P.O. Box 976, Rosemead, California 91770, and the telephone numbers are (626) 302-2222 for Edison International and (626) 302-1212 for SCE.
This is a combined Annual Report on Form 10-K for Edison International and SCE. Edison International and SCE make available at www.edisoninvestor.com: Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, Proxy Statements and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act, as soon as reasonably practicable after Edison International and SCE electronically file such material with, or furnishes it to, the SEC. Such reports are also available on the SEC's internet website at www.sec.gov. The information contained on, or connected to, the Edison investor website is not incorporated by reference into this report.
Subsidiaries of Edison International
SCE – Public Utility
SCE is an investor-owned public utility primarily engaged in the business of supplying and delivering electricity through SCE's electrical infrastructure to an approximately 50,000 square-mile area of southern California. SCE serves approximately 5 million customers in its service area. SCE's total number of customers by class were as follows:
(in thousands) 2017 2016 2015
Residential 4,448 
4,417

 
4,393

Commercial 
569

 
565

 561
Industrial 
10

 
10

 
11

Public authorities 46 
46

 
46

Agricultural and other 22 23 22
Total 5,095 644 5,033
In 2016,2017, SCE's total operating revenue of $11.8$12.3 billion was derived as follows: 42.0%42.9% commercial customers, 39.6% residential customers, 3.9%4.3% industrial customers, 4.9%4.8% public authorities, 2.2%1.7% agricultural and other, and 7.4%6.7% other operating revenue.
CPUC and FERC rates decouple authorized revenue from the volume of electricity sales and the price of energy procured so that SCE has the opportunity to receive revenue equal to amounts authorized by the relevant regulatory agencies. As a result, the volume of electricity sold to customers does not have a direct impact on SCE's financial results. See "SCE—Overview of Ratemaking Process—CPUC" and "—FERC" for further information.
Edison Energy Group – Energy Service Provider
Edison Energy Group is a holding company for subsidiaries engaged in pursuing competitive business opportunities across energy and managed portfolio services and distributed solar solutions to commercial and industrial customers. Energy services are provided through its subsidiary, Edison Energy, LLC, to help commercial and industrial customers improve managing of their energy costs and risks in dealing with increasingly complex tariff and technology choices. Solar energy solutions are provided through Edison Energy Group's subsidiary SoCore Energy and take the form of behind the meter sales of power under power purchase agreements or the sale of distributed generation systems directly to the customer (build/transfer contracts). SoCore Energy has also developed ground mounted solar projects selling power to rural cooperatives or to subscribers in community solar programs. As
During the third quarter of December 31, 2016, SoCore2017, Edison International completed a strategic review of Edison Energy had constructed and achieved commercial operations for 94 MW of rooftop solar systems in 21 states.Group's competitive businesses. The competitive businesses are undertaken through Edison Energy Group throughand include energy services provided by Edison Energy and distributed solar solutions provided by SoCore Energy. Edison International decided to evaluate strategic options, including potential sale of SoCore Energy, and has begun to consolidate management across Edison Energy

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Group. Edison Energy will continue to pursue a proof of concept of its subsidiaryexisting energy services and managed portfolio solutions practice for large energy users in the United States. Under the proof of concept, Edison Transmission, LLC, is oneEnergy will seek to achieve a breakeven earnings run rate and 5% target customer penetration by the end of 2019. For more information on the eight foundersaccounting status of Grid AssuranceTM, a limited liability company developing grid resiliency offerings for domestic utilities.SoCore Energy, see "Results of Operations—Edison International Parent and Other" in the MD&A.
To date, investments in Edison Energy Group are below 1% of the total consolidated assets and operating revenue, therefore, not material to be reported as a business segment.
Regulation of Edison International as a Holding Company
As a public utility holding company, Edison International is subject to the Public Utility Holding Company Act. The Public Utility Holding Company Act primarily obligates Edison International and its utility subsidiaries to provide access to their books and records to the FERC and the CPUC for ratemaking purposes.
Edison International is not a public utility and its capital structure is not regulated by the CPUC. The 1988 CPUC decision authorizing SCE to reorganize into a holding company structure, however, imposed certain obligations on Edison International and its affiliates. These obligations include a requirement that SCE's dividend policy shall continue to be established by SCE's Board of Directors as though SCE were a stand-alone utility company, and that the capital requirements of SCE, as deemed to be necessary to meet SCE's electricity service obligations, shall receive first priority from the Boards of Directors of Edison International and SCE. The CPUC has also promulgated Affiliate Transaction Rules, which, among other requirements, prohibit holding companies from (1) being used as a conduit to provide non-public information to a utility's affiliateaffiliates and (2) causing or abetting a utility's violation of the rules, including providing preferential treatment to its affiliates.

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Employees and Labor Relations
At December 31, 2016,2017, Edison International and its consolidated subsidiaries had an aggregate of 12,39012,521 full-time employees, 11,94712,234 of which were full-time employees at SCE.
Approximately 3,9003,975 of SCE's full-time employees are covered by collective bargaining agreements with the International Brotherhood of Electrical Workers ("IBEW"). The IBEW collective bargaining agreements expire on December 31, 2019.
Insurance
Edison International maintains a property and casualty insurance program for itself and its subsidiaries and excess liability insurance covering liabilities to third parties for bodily injury or property damage resulting from operations. These policies are subject to specific retentions, sub-limits and deductibles, which are comparable to those carried by other utility companies of similar size. SCE also has separate insurance programs for nuclear property and liability, workers compensation, and solar rooftop construction.construction and wildfires. For further information on nuclear and wildfire insurance, see "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies."
SCE
Regulation
CPUC
The CPUC has the authority to regulate, among other things, retail rates, energy purchases on behalf of retail customers, SCE capital structure, rate of return, issuance of securities, disposition of utility assets and facilities, oversight of nuclear decommissioning funding and costs, and aspects of the transmission system planning, site identification and construction, including safety and environmental mitigation.
FERC
The FERC has the authority to regulate wholesale rates as well as other matters, including unbundled transmission service pricing, rate of return, accounting practices, and licensing of hydroelectric projects. The FERC also has jurisdiction over a portion of the retail rates and associated rate design.
CAISO
Major transmission projects required for reliability and accessing renewable resources are recommended by the California Independent System Operator ("CAISO")CAISO through a regular transmission planning process that highlights the need for and key issues associated with each project. Much of SCE’sSCE's current transmission investment program is for transmission projects that facilitate access to renewable


energy resources in desert and mountain regions east and north of its load center to meet the 33% renewable mandate by 2020. The CAISO will similarly be initiating long-term transmission planning to meet the 2030 mandate for SCE to deliver 50% of its energy from qualifying renewable resources.
NERC
The FERC assigned administrative responsibility to the NERC to establish and enforce reliability standards and critical infrastructure protection standards, which protect the bulk power system against potential disruptions from cyber and physical security breaches. The critical infrastructure protection standards focus on controlling access to critical physical and cyber security assets, including supervisory control and data acquisition systems for the electric grid. Compliance with these standards is mandatory. The maximum penalty that may be levied for violating a NERC reliability or critical infrastructure protection standard is $1 million per violation, per day.
SCE has a formal cyber security program that covers SCE's information technology systems as well as customer data. Program staff is engaged with industry groups as well as public-private initiatives to reduce risk and to strengthen the security and reliability of SCE's systems and infrastructure. The program is also engaged in the protection of SCE's customer information.
Nuclear Power Plant Regulation
The NRC has jurisdiction with respect to the safety of San Onofre and Palo Verde Nuclear Generating Stations. The NRC regulates commercial nuclear power plants through licensing, oversight and inspection, performance assessment, and enforcement of its requirements. In June 2013, SCE decided to permanently retire and decommission San Onofre. For further information, see "Liquidity and Capital Resources—SCE—Decommissioning of San Onofre" in the MD&A.


Other Regulatory Agencies
The construction, planning and project site identification of SCE's transmission lines and substation facilities require the compliance with various laws and approval of many governmental agencies and compliance with various laws in addition to the CPUC and FERC. These include various state regulatory agencies depending on the project location; the CAISO, and other environmental, land management and resource agencies such as the Bureau of Land Management, the U.S. Forest Service, the California Department of Fish and Game, and the California Coastal Commission; and regional water quality control boards. In addition, to the extent that SCE transmission line projects pass through lands owned or controlled by Native American tribes, consent and approval from the affected tribes and the Bureau of Indian Affairs are also necessary for the project to proceed.
Overview of Ratemaking Process
CPUC
Revenue authorized by the CPUC through triennial GRC proceedings is intended to provide SCE a reasonable opportunity to recover its costs and earn a return on its net investments in generation and distribution assets and general plant (also referred to as "rate base") on a forecast basis. The CPUC sets an annual revenue requirement for the base year which is made up of the operation and maintenance costs, depreciation, taxes and a return consistent with the authorized cost of capital (discussed below). In the GRC proceedings, the CPUC also generally approves the level of capital spending on a forecast basis. Following the base year, the revenue requirements for the remaining two years are set by a methodology established in the GRC proceeding, which generally, among other items, includes annual allowances for escalation in operation and maintenance costs and additional changes in capital-related investments. The CPUC is conducting a triennial safety model assessment proceeding ("S-MAP") to evaluate the utility models used to prioritize safety risks, examine the utilities' assessment of their key risks and their proposed mitigation programs, and develop requirements for annual reporting of risk spending and mitigation results. The risk assessment approach developed in the S-MAP will be incorporated into SCE's triennial GRC through a Risk Assessment and Mitigation Phase (RAMP), which will be initiated by November 15 in the year preceding each GRC application filing date. SCE's first RAMP will be filed in November 2018 for its 2021 GRC. The purpose of the RAMP is to provide information about the utility's assessment of its key safety risks and its proposed programs and spending for mitigating those risks. The information developed during the RAMP will inform the utility's recommended projects and funding requests in the subsequent phase of the GRC.
SCE's 2015 GRC authorized revenue requirements for 2016 and 2017 arewere $5.391 billion, and $5.663 billion, respectively. In September 2016, SCE filed its 2018 GRC Application, which covers 2018 – 2020. For further discussion of the 2018 GRC, see "Management Overview—Regulatory Proceedings—2018 General Rate Case" in the MD&A.
The CPUC regulates SCE's cost of capital, including its capital structure and authorized rates of return. SCE's authorized capital structure is 43% long-term debt, 9% preferred equity and 48% common equity. SCE's currently2017 authorized cost of capital consists

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consisted of: cost of long-term debt of 5.49%, cost of preferred equity of 5.79% and return on common equity of 10.45%. In FebruaryJuly 2017, the CPUC approved the agreement among SCE, and the other Investor-Owned Utilities, agreed withand ORA and TURN to postpone the filing of new cost of capital applications from April 2017 to April 2019, reset the respective Investor-Owned Utilities' authorized costs of long-term debt and preferred stock, and reduce the Investor-Owned Utilities respective return on common equity, subject to CPUC approval.effective January 1, 2018. For more information,further discussion of the Cost of Capital, see "Management Overview—"Liquidity and Capital Resources—SCE—Regulatory Proceedings—Cost of Capital" in the MD&A.
SCE's authorized return on investment is established by multiplying an authorized rate of return, determined in separate cost of capital proceedings, by SCE's authorized CPUC rate base.
CPUC rates decouple authorized revenue from the volume of electricity sales and the price of energy procured so that SCE receives revenue equal to amounts authorized. Differences between amounts collected and authorized levels are either collected from or refunded to customers, and, therefore, such differences do not impact operating revenue. Accordingly, SCE is neither benefited nor burdened by the volumetric or price risk related to retail electricity sales.
Cost recoveryCost-recovery balancing accounts (also referred to as cost-recovery mechanisms) are used to track and recover SCE's decoupled costs of fuel and purchased-power, as well as certain operation and maintenance expenses, including energy efficiency and demand-side management program costs. SCE earns no return on these activities and although differences between forecasted and actual costs do not impact earnings, such differences do impact cash flows and can change rapidly. SCE has other capital-related balancing accounts on which it earns a return, such as the pole loading balancing account.
SCE's balancing account for fuel and power procurement-related costs is referred to as the ERRA. SCE sets rates based on an annual forecast of the costs that it expects to incur during the subsequent year. In addition, the CPUC has established a "trigger" mechanism for the ERRA. The trigger mechanisms allows for an expeditious rate change if the balancing account

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over- overcollection or under-collectionundercollection exceeds 5% of SCE's prior year generation rate revenue. For 2017,2018, the trigger amount is approximately $229$246 million. At December 31, 2016,2017, SCE's overcollectionundercollection in the ERRA was approximately $20$464 million, which is being refunded tocollected from customers in rates beginning on January 1, 2017.2018.
The majority of procurement-related costs eligible for recovery through cost-recovery rates are pre-approved by the CPUC through specific decisions and a procurement plan with predefined standards that establish the eligibility for cost recovery.cost-recovery. If such costs are subsequently found to be non-compliant with this procurement plan, then this could negatively impact SCE's earnings and cash flows. In addition, the CPUC retrospectively reviews outages associated with utility-owned generation and SCE's power procurement contract administration activities through the annual ERRA review proceeding. IfA CPUC finding that SCE is found to bewas unreasonable or imprudent with respect to its utility-owned generation outages and contract administration activities, then this could negatively impact SCE's earnings and cash flows.
FERC
Transmission capital and operating costs that are prudently incurred, including a return on its net investment in transmission assets (also referred to as "rate base"), are recovered through revenuesrevenue authorized by the FERC. Since 2012, SCE has used a formula rate to determine SCE's FERC transmission revenue requirement, including its construction work in progress ("CWIP") revenue requirement. Under operation of the formula rate, transmission revenue will be updated to actual cost of service annually. The transmission revenue requirement and rates are updated each December, to reflect a forecast of costs for the upcoming rate period, as well as a true up of the transmission revenue to actual costs incurred by SCE in the prior calendar year on its formula rate. TheIn 2017, the FERC weighted average ROE, including project and other incentives, iswas comparable to the CPUC ROE of 10.45% and can vary based on the mix of project costs that have different incentives. For further information on the current FERC formula rates, related transmission revenue requirements and rate changes, see "Management Overview—"Liquidity and Capital Resources—SCE—Regulatory Proceedings—FERC Formula Rates"Rate" in the MD&A.
Retail Rates Structure and Residential Rate Design
To develop retail rates, the authorized revenue requirements are allocated among all customer classes (residential, commercial, industrial, agricultural and street lighting) on a functional basis (i.e., generation, distribution, transmission, etc.). Specific rate components are designed to recover the authorized revenue allocated to each customer class.
SCE has a two-tier residential rate structure with a separate Super User Electric (SUE) surchargeHigh Usage Charge (HUC) for customers consuming more than 400% of average usage. The first tier is priced at below-average cost.cost and is intended to cover the customer's basic electricity needs. The second tier is priced at a higher rate per kilowatt hour, and the surcharge rate is set at more than twice the rate of Tier 1. During 2014 – 2015, the CPUC approved changes to the prior rate structure including a reduction over time to the number of tiers, increases to Tier 1 and 2 rates, permitted reductions over time to the number of tiers, and set a multi-tier road map to smaller rate differentials between the tiers. By 2019, the price differential between the first and second tiers will be 25%, with the separate SUE surcharge.HUC. The CPUC has also

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ordered a transition beginning in 2019 from tiered to time-of-use (TOU) rates for most residential customers unless they opt to stay on the tiered rate structure. The CPUC also permitsstructure, and SCE is seeking authority to begin its transition in 2020. To recover a larger portion of itsthe fixed costs of serving no- or low-usage residential customers, throughSCE assesses a minimum charge of $10 per month minimum bill ($5 for low-income customers) rather than through energy, and will seek higher residential fixed charges that vary with usage.to be implemented one year after the transition to TOU rates. For information on residential rates for customers with renewable generation systems, see "—Competition" below.
Energy Efficiency Incentive Mechanism
Prior to September 2013, the mechanism used an incentive calculation that is based on actual energy efficiency expenditures. In September 2013, the CPUC adopted an energy efficiency incentive mechanism called the Energy Savings and Performance Incentive Mechanism ("ESPI"). The ESPI applies starting with the 2013 – 2014 energy efficiency program cycle and continue for subsequent cycles, until further notice. The ESPI is comprised of performance/savings rewards and management fees based on actual energy efficiency expenditures and does not contain any provisions for penalties. The proposed ESPI schedule anticipates payments of the incentive rewards occurring between one and two years after the relevant program year. For further information on the energy efficiency awards, see "Management Overview—"Liquidity and Capital Resources—SCE—Regulatory Proceedings—Energy Efficiency Incentive Mechanism" in the MD&A.
Purchased Power and Fuel Supply
SCE obtains the power, energy, and local grid support needed to serve its customers primarily from purchases from external parties. Less thanApproximately 20% of the needed power is provided by SCE's own generating facilities.

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Natural Gas Supply
SCE requires natural gas to meet contractual obligations for power tolling agreements (power contracts in which SCE has agreed to provide or pay for the natural gas used to generate electricity). SCE also requires natural gas to fuel its Mountainview and peaker plants, which are generation units that are designed to operate in response to changes in demand for power.wholesale market signals related to power prices and reliability needs. The physical natural gas purchased by SCE is sourced in competitive interstate markets. SoCalGas provides the in-state pipeline transportation service to the gas-fueled generation stations that SCE controls. In 2015 – 2016, SoCalGas experienced a significant natural gas fuel leak at its Aliso Canyon underground gas storage facilityfacility. As a result, there are limitations on the use and capability of the facility has not been returned to service.facility. To date, SCE has found that increased gas-use restrictions increased the cost of electricity for customers but did not impact grid reliability. There is no certainty that these restrictions will not impact grid reliability in the future. However, the price increase would not affect SCE's earnings because decoupled costs of fuel and purchased-power are recovered from customers through balancing accounts. For more information on cost-recovery mechanisms, see "—Overview of Ratemaking Process" above. SCE is actively monitoring legislative and regulatory processes that are addressing pipeline and electric grid operations impacted by the Aliso Canyon leak, including thean OII issued by the CPUC in February 2017 to consider the feasibility of minimizing or eliminating the use of the Aliso Canyon facility. SCE has also made additional procurement efforts to alleviate the impact of the partial closure of Aliso Canyon, including acceleration of existing contracts for new capacity, energy storage procurement from third-parties, contracting for design, build, and transfer of utility-owned storage, additional demand response procurement, and additional energy efficiency procurement.
CAISO Wholesale Energy Market
The CAISO operates a wholesale energy market primarily in California through which competing electricity generators offer their electricity output to market participants, including electricity retailers. The CAISO schedules power in hourly increments with hourly prices through a day-ahead market in California and schedules power in fifteen-minute and five-minute increments with fifteen-minute and five-minute prices through two real-time markets that cover California and portions of six neighboring states through the Energy Imbalance Market. Both markets optimize energy procurement, ancillary service procurement, unit commitment and congestion management. SCE participates in the day-ahead and real-time markets for the sale of its own generation and generation under contract purchases for its load requirements.
Competition
SCE faces retail competition in the sale of electricity to the extent that federal and California laws permit other entities to provide electricity and related services to customers within SCE's service area. While California law provides only limited opportunities for customers in SCE's service area to choose to purchase power directly from an energy service provider other than SCE, a limited, phased-in expansion of customer choice (direct access) for nonresidential customers was permitted beginning in 2009. SCE also faces competition from community choice aggregators ("CCAs").governmental entities formed by cities, counties, and certain other public agencies to generate and/or purchase electricity for their local residents and businesses, known as CCAs. As of year-end 2016,2017, SCE had only one CCAthree CCAs in its service territory (City(Apple Valley, City of Lancaster)Lancaster, and Pico Rivera) that represent less than 2% of SCE's total service load but there are several more cities and counties that are exploring the possibility of becoming CCAs in SCE's service territory. Competition between SCE and other electricity providers is conducted mainly on

117




the basis of price. In September 2017, the CPUC issued a Scoping Memo for its rulemaking to review, revise, and consider alternatives to the Power Charge Indifference Adjustment ("PCIA"), which is a charge that is applied to departing load customers (including CCA formation) and is intended to maintain bundled service customer indifference to legacy authorized procurement costs. The Scoping Memo adopts an overall goal of implementing the existing California statutory requirements regarding customer indifference for the proceeding. The CPUC has adopted a schedule with an expected resolution by the third quarter of 2018. In addition, in December 2017, the CPUC's Energy Division issued a draft resolution to address cost shifting to bundled services customers associated with utilities' short-term resource adequacy purchases for CCAs in their launch or expansion year. The Draft Resolution, if adopted, would require new and expanding CCAs to submit Implementation Plans by January 1 in order to serve customers in the following year. If approved, the Draft Resolution would also require new and expanding CCAs to participate in the Commission's year-ahead resource adequacy program prior to beginning service.
SCE also faces increased usage of customer-ownedCustomer-owned power generation and storage alternatives, such as roof-top solar facilities and battery systems, becoming available to itsare increasingly used by SCE's customers as a result of technological developments, federal and state subsidies, and declining costs of such alternatives.
California legislation passed in 1995 encouraged private residential and commercial investment in renewable energy resources by requiring SCE to offer a net energy metering ("NEM")NEM billing option to customers who install eligible power generation systems to supply all or part of their energy needs. NEM customers are interconnected to SCE's grid and credited for the net difference between the electricity SCE supplied to them through the grid and the electricity the customer exported to SCE over a twelve month period. SCE is required to credit the NEM customer for most of the power they sell back to SCE at the retail rate. Through the credit they receive, NEM customers effectively avoid paying certain grid-related costs. NEM customers are also exempted from non-bypassable, standby and departing load charges and interconnection fees.
In January 2016, the CPUC issued a decision implementing AB 327, a rate reform bill enacted in 2013 that instructed the CPUC to develop new standard rates for customers with renewable generation systems. The changes that the CPUC decision made to the existing NEM tariff do not significantly impact the NEM subsidy. Specifically, the decision requires customers that take service on SCE’sSCE's NEM tariff after June 2017 to continue to be compensated at the retail rate, minus certain non-bypassable charges. NEM customers will also continue to be exempted from standby and departing load charges, but will be required to pay a $75 interconnection fee and to select a Time-of-Use ("TOU") retail rate. The CPUC will consider making additional adjustments to the NEM tariff when it adopts default TOU rates in 2019.

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The effect of these types of competition on SCE generally is to reduce the amount of electricity purchased by customers. However customers, except for NEM customers,Customers who use alternative electricity providers typically continue to utilize and pay for SCE's transmission and distribution services, however, NEM customers utilize, but do not pay the full cost for, those services. While changes in volume or rates generally do not impact SCE, increased retail electricity sales have the effect of increasing utility rates because the costs of the distribution grid are not currently borne by all customers that benefit from its use. See "Risk Factors—Risks Relating to Southern California Edison Company—Competitive and Market Risks."
In the area of transmission infrastructure, SCE has experienced increased competition from independent transmission providers under the FERC's transmission planning requirements rules, effective in 2011, that removed the incumbent public utility transmission owners' federally-based right of first refusal to construct certain new transmission facilities and mandated regional and interregional transmission planning. Regional entities, such as independent system operators, have processes for regional and interregional transmission planning and the competitive solicitation and selection of developers (including incumbent utilities) to build and own certain types of new transmission projects. In 2014, the FERC approved the CAISO's process for regional planning and competitive solicitations and the CAISO's interregional planning process. The CAISO has held competitive solicitations pursuant to these rules and independent service providers were selected. 

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Properties
SCE supplies electricity to its customers through extensive transmission and distribution networks. Its transmission facilities, which include sub-transmission facilities and are located primarily in California but also in Nevada and Arizona, deliver power from generating sources to the distribution network and consist of lines ranging from 33 kV to 500 kV and substations. SCE's distribution system, which takes power from substations to customers, includes over 53,000 line miles of overhead lines, 38,000 line miles of underground lines and approximately 800 substations, all of which are located in California. SCE owns the generating facilities listed in the following table:
Generating Facility 
Location
(in CA, unless
otherwise noted)
 Fuel Type Operator 
SCE's
Ownership
Interest (%)
Net Physical
Capacity
(in MW)
 
SCE's Capacity
pro rata share
(in MW)
Hydroelectric Plants (33) Various Hydroelectric SCE 100%1,153
  1,153
 
Pebbly Beach Generating Station (including battery storage) Catalina Island Diesel/Liquid Petroleum Gas SCE 100%11
1 11
1
Mountainview Units 3 and 4 Redlands Natural Gas SCE 100%1,050
  1,050
 
Peaker Plants (3) Various Natural Gas SCE 100%147
  147
 
Enhanced Peaker Plants (2)
   (gas turbine and battery storage)
 Various Natural gas SCE 100%98
2 98
2
Palo Verde Nuclear Generating Station Phoenix, AZ Nuclear APS 15.8%3,739
  591
 
Solar PV Plants (25) Various Photovoltaic SCE 100%91
  91
 
Fuel Cells (2) Various Natural Gas SCE 100%2
  2
 
Mira Loma Energy Storage Mira Loma Electricity SCE 100%20
  20
 
Energy Storage Projects (4) Various Electricity SCE 100%12.4
  12.4
 
Total        
6,323.4
  3,175.4
 
1 
Pebbly Beach Generating Station consists of 11 MW of diesel generators and liquid petroleum gas micro-turbines supported by 1 MW of battery storage capacity.
2 
Enhanced peaker plants consist of 98 MW of gas turbine supported by 20 MW of battery storage capacity.
Certain of SCE's substations, and portions of its transmission, distribution and communication systems are located on lands owned by the federal, state or local governments under licenses, permits, easements or leases, or on public streets or highways pursuant to franchises. Certain of the documents evidencing such rights obligate SCE, under specified circumstances and at its expense, to relocate such transmission, distribution, and communication facilities located on lands owned or controlled by federal, state, or local governments.
The majority of SCE's hydroelectric plants and related reservoirs are located in whole or in part on U.S.-owned lands and are subject to FERC licenses. Slightly over half of these plants have FERC licenses that expire at various times between 2021 and 2046. FERC licenses impose numerous restrictions and obligations on SCE, including the right of the United States to acquire projects upon payment of specified compensation. When existing licenses expire, the FERC has the authority to issue new licenses to third parties that have filed competing license applications, but only if their license application is superior to SCE's

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and then only upon payment of specified compensation to SCE. New licenses issued to SCE are expected to contain more restrictions and obligations than the expired licenses because laws enacted since the existing licenses were issued require the FERC to give environmental objectives greater consideration in the licensing process. In addition, SCE expects additional opposition to new licenses by environmental stakeholder groups. Substantially all of SCE's properties are subject to the lien of a trust indenture securing first and refunding mortgage bonds. See "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements."
Seasonality
Due to warm weather during the summer months and SCE's rate design, operating revenue during the third quarter of each year is generally higher than the other quarters.

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ENVIRONMENTAL REGULATION OF EDISON INTERNATIONAL AND SUBSIDIARIES
Edison International's subsidiaries are subject to regulation by federal, state, and local authorities in the United States relating to energy and the environment. These regulations impose restrictions on the operation of existing facilities, as well as the cost of mitigating the environmental impacts of past operations. For more information on environmental risks, see "Risk Factors—Risks Relating to Southern California Edison Company—Environmental Risks."
Edison International and SCE continue to monitor legislative and regulatory developments and to evaluate possible strategies to meet the various environmental mandates. Additional information about environmental matters affecting Edison International and its subsidiaries, is included in "Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Contingencies—Environmental Remediation."CONSIDERATIONS
Greenhouse Gas Regulation
There have beenEdison International recognizes that its industry and the global economy are in the midst of a numberprofound transformation toward a low-carbon future as a response to climate change. SCE plans to be a key enabler of federal and state legislative and regulatory initiatives to reduce GHG emissions. Any climate change regulation or other legal obligation that would require substantial reductions in GHG emissions or that would impose additional costs or charges for the emission of GHGs could significantly increase the cost of generating electricity from fossil fuels, as well as the cost of purchased power. However the same regulations could potentially present opportunities to improve SCE's systems to enable the grid's role in the adoption of new energy technologies. These regulations could also contribute to the introduction of new types of electric loads as a resulttechnologies that benefit customers of the replacementelectric grid. See "Management Overview—Electricity Industry Trends" in the MD&A.
Approximately 20% of fossil fuel usepower delivered to SCE's customers comes from utility-owned generation. In 2017, the sources of utility-owned generation were 6% natural gas, 6 % nuclear, 7% large hydroelectric, 1% small hydroelectric, and less than 1% solar generation. Approximately 30% of power that SCE delivered to customers in other sectors of the economy by electrification in order to achieve statewide GHG emission reductions.2017 came from renewable sources.
Federal Legislative/Regulatory DevelopmentsRegulation
In August 2015, the US EPA issued final rules governing GHG emission standards for existing fossil-fuel power plants. Known as the Clean Power Plan, the rules establishestablished state-specific goals and guidelines for the reduction of GHG emissions from existing sources, including heat rate efficiency improvements at coal plants, displacement of coal-fired electric generation with increased utilization of natural gas combined cycle unit generation, and expanding deployment of renewable resources. The Clean Power Plan requires states to impose standards of performance limits for existing fossil fuel-fired electric generating units, or equivalent statewide intensity-based or mass-based CO2 binding goals or limits. States were required either to submit state plans to the US EPA by the Fall of 2016 identifying how they will comply with the rules, or to submit interim plans, along with a request for a two-year extension. Final plans for all states are due by the Fall of 2018. SCE is participating in the stakeholder efforts to develop the California state plan. Both the timing and the substance of the Clean Power Plan are subject to ongoing judicial challenges and in Februarysources. In 2016, the US Supreme Court blocked the implementation of the Clean Power Plan pending the completion of the judicial challenges. This action has delayedThe US EPA also issued an Advanced Notice of Proposed Rulemaking indicating that the imposition of the deadlines for the state plans discussed above. Comments made by the new federal administration indicate that further delay, or evenagency intends to issue a full rescissionreplacement of the Clean Power Plan. SCE does not expect the impact of either the original Clean Power Plan, is likely.  SCE cannot predict the ultimate dispositionor its replacement, to be material because it does not own or purchase power from coal-fired generating facilities and a significant portion of the challengespower it delivers to this regulation and therefore, cannot determine any potential compliance costs or market risks associated with its possible implementation.customers comes from renewable resources.
Since 2010, the US EPA's Final Mandatory GHG Reporting Rule has required all sources within specified categories, including electric generation facilities, to monitor emissions, and to submit annual reports to the US EPA by March 31 of each year. SCE's 2016 GHG emissions from utility-owned generation are estimated to be approximately 2.0 million metric tons.California Regulation
Regional Initiatives and State Legislation
Regional initiatives and state legislation also require reductions of GHG emissions and to the extent those requirements are more stringent than federal requirements, utilities and generators will likely be required to satisfy the regional and state requirements in addition to the federal standards.

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SCE's operations inIn 2006, California are subject to several laws governing GHG emissions. The firstadopted a law the California Global Warming Solutions Act of 2006 (also referred to as AB 32), establishesthat established a comprehensive program to reduce GHG emissions. AB 32The law required the California Air Resources Board ("CARB") to develop regulations that would reduce California's GHG emissions to 1990 levels by 2020. TheIn 2012, the CARB regulations became effective in 2012 and established a California cap-and-trade program.program and in July 2017, California law extended California’s market-based GHG reduction regulatory framework, which includes the Cap-and-Trade and Low Carbon Fuel Standard programs, to 2030. In the California cap-and-trade program, all covered GHG emitters, including SCE, are subject to a "cap" on their emissions designed to encourage entities to reduce emissions from their operations. Covered entities must remit a compliance instrument for each ton of carbon dioxide equivalent gas emitted and can do so buying state-issued emission allowances at auction or purchasing them in the secondary allowance market. GHG emitters can also meet up to 8% of their AB 32 cap-and-trade obligations by participating in verified offset programs, such as reforestation, that have recognized effects on reducing atmospheric GHGs.
Subsequently, SB 1368 requiredAdditionally, the CPUC and the California Energy Commission to adoptadopted GHG emission performance standards that apply to California investor-owned and publicly owned utilities' long-term arrangements for the purchase of electricity. The standards that have been adopted prohibit these entities, including SCE, from entering into long-term financial commitments with generators, such as coal plants, that emit more than 1,100 pounds of CO2 per megawatt-hour, which is the performance of a combined-cycle natural gas turbine generator.
In 2011, California enacted a law to requirealso requires California retail sellers of electricity to deliver 33% of their customers' electricity requirements from renewable resources, as defined in the statute. The CPUC set delivery quantity requirements applicable to SCE that incrementally increase to 33% over several periods between January 2011 and December 2020. In October 2015, California enacted SB 350, which increasesa law that increased the amount of electricity from renewable resources that California retail sellers must deliver after 2020 to 40% of retail sales by December 2024, 45% of retail sales by December 2027, and 50% of retail sales by December 2030.
SCE's delivery of eligible renewable resourcesenergy to customers was approximately 21% of its total energy portfolio for the compliance period 2011 2013, which met SCE's goal for that period. SCE expects to meetalso met its compliance goal offor the compliance period 2014 – 2016 by supplying its customer load with approximately 23% as weighted foreligible renewable energy. SCE estimates its 2017 eligible renewable energy deliveries to be approximately 32% of its total energy portfolio. SCE anticipates that it will comply with the 2014  2016 compliance period.requirements through 2030.
Most recently, in 2016, California has also enacted SB 32, whicha law that requires the reduction of GHG emissions across the entire Californiastate economy to 40% below 1990 levels by 2030. California also supports climate action to meet the December 2015 Paris Agreement. Edison International expects this newest law will likely expand the focus of reductions from the generation of electricity to other large sources of GHG emissions such as the transportationsupports these California environmental initiatives and industrial sectors. Edison International believes that this change in focus will likely lead to increased electrification of thesethe transportation and industrial sectors. AB 197, also enacted in 2016 as aA companion bill to SB 32,the emission reduction law prioritized direct emission reductions, established joint-legislative oversight committee on climate change, and highlighted the increasing California legislative focus on disadvantaged community impacts of air pollution and climate change. See "Management Overview—Electricity Industry Trends" in the MD&A.

120




Since 2010, SCE has reported its annual emissions from utility-owned generation each year to the US EPA by March 31 of the following year. SCE's 2017 GHG emissions from utility-owned generation are estimated to be approximately 1.6 million metric tons.
Environmental Risks
For more information on risks related to climate change, environmental regulation, and SCE's business strategy, see "Risk Factors—Risks Relating to Southern California Edison Company—Operating Risks."
UNRESOLVED STAFF COMMENTS
None.
PROPERTIES
As a holding company, Edison International does not directly own any significant properties other than the stock of its subsidiaries. The principal properties of SCE are described above under "Business—Southern California Edison Company—SCE—Properties."
LEGAL PROCEEDINGS
None.December 2017 Wildfires Litigation
The December 2017 Wildfires impacted portions of SCE's service territory and caused substantial damage to both residential and business properties and service outages for SCE customers. The largest of these fires, known as the Thomas Fire, originated in Ventura County and burned acreage located in both Ventura and Santa Barbara Counties. According to the most recent California Department of Forestry and Fire Protection ("Cal Fire") incident information report, the Thomas Fire burned over 280,000 acres, destroyed an estimated 1,063 structures, damaged an estimated 280 structures and resulted in two fatalities.
As of February 20, 2018, SCE was aware of at least 17 lawsuits against it related to December 2017 Wildfires. One of these lawsuits also mentions Edison International as a defendant. At least four of these lawsuits were filed as purported class actions. The lawsuits, which have been filed in the superior courts of Ventura, Santa Barbara and Los Angeles Counties allege, among other things, negligence, inverse condemnation, trespass, private nuisance, and violations of the public utility and health and safety codes.
Montecito Mudslides Litigation
In January 2018, torrential rains in Santa Barbara County produced mudslides in Montecito and surrounding areas. According to Santa Barbara County, the Montecito Mudslides destroyed an estimated 135 structures, damaged an estimated 324 structures, and resulted in at least 21 fatalities, with two additional fatalities presumed.
Six of the 17 lawsuits mentioned under "December 2017 Wildfires Litigation" above allege that SCE has responsibility for the Thomas Fire and that the Thomas Fire proximately caused the Montecito Mudslides, resulting in the plaintiffs’ claimed damages.


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EXECUTIVE OFFICERS OF EDISON INTERNATIONAL
Executive Officer Age at
December 31, 2016February 22, 2018
 Company Position
Pedro J. Pizarro 5152 President and Chief Executive Officer
Maria Rigatti 5354 Executive Vice President and Chief Financial Officer
Adam S. Umanoff 5758 Executive Vice President and General Counsel
Janet T. Clayton 62 Senior Vice President, Corporate Communications
J. Andrew Murphy 5557 Senior Vice President, Strategic Planning
Gaddi H. Vasquez 6163 Senior Vice President, Government Affairs
Jacqueline Trapp 4950 Vice President, Human Resources
Kevin M. Payne 5657 Chief Executive Officer, SCE
Ronald O. Nichols 6364 President, SCE
Ronald L. Litzinger57President, Edison Energy Group, Inc.
As set forth in Article IV of Edison International's and the relevant subsidiary's Bylaws, the elected officers of Edison International and its subsidiaries are chosen annually by, and serve at the pleasure of, Edison International and the relevant subsidiary's Board of Directors and hold their respective offices until their resignation, removal, other disqualification from service, or until their respective successors are elected. All of the officers of Edison International and its subsidiaries have been actively engaged in the business of Edison International and its subsidiaries for more than five years, except for Mssrs.Messrs. Umanoff, Nichols, and Murphy, and have served in their present positions for the periods stated below. Additionally, those officers who have had other or additional principal positions in the past five years had the following business experience during that period:
Executive Officers Company Position Effective Dates
Pedro J. Pizarro

 
Chief Executive Officer, Edison International
President, Edison International
President, SCE
President, EME1
 
September 2016 to present
June 2016 to present
October 2014 to June 2016
January 2011 to March 2014
Maria Rigatti 
Executive Vice President, Chief Financial Officer
Senior Vice President and Chief Financial Officer, SCE
President, Edison Mission Reorganization Trust (EME Reorg Trust)2
Senior Vice President, Chief Financial Officer, EME1
 
September 2016 to present
July 2014 to September 2016 April 2014 to June 2014
March 2011 to March 2014
Adam S. Umanoff 
Executive Vice President and General Counsel
Edison International
Partner, Akin Gump Strauss Hauer & Feld3

 

January 2015 to present
May 2011 to December 2014

Janet T. Clayton 
Senior Vice President, Corporate Communications,
Edison International
Senior Vice President, Corporate Communications, SCE

 

April 2011 to present
April 2013 to present

J. Andrew Murphy 
Senior Vice President, Strategic Planning, Edison International
Senior Managing Director, Macquarie Infrastructure and Real Assets4
Executive Vice President, Strategy and M&A, NRG Energy, Inc.5

 
September 2015 to present
January 2012 to August 2015
August 2011 to November 2012

Gaddi H. Vasquez 
Senior Vice President, Government Affairs, Edison International and SCE
Senior Vice President, Public Affairs, SCE
 

May 2013 to present
July 2009 to May 2013
Jacqueline Trapp 
Vice President, Human Resources, Edison International and SCE
Director, Executive Talent and Rewards, Edison International
Director, Executive Development, Edison International

 
June 2016 to present
July 2012 to June 2016
June 2010 to July 2012
Kevin M. Payne 
Chief Executive Officer, SCE
Senior Vice President, Customer Service, SCE
Vice President, Engineering and Technical Services, SCE
 
June 2016 to present
March 2014 to June 2016
September 2011 to February 2014
Ronald O. Nichols 
President, SCE
Senior Vice President, Regulatory Affairs, SCE
General Manager/Chief Executive Officer, Los Angeles Department of Water and Power65



 
June 2016 to present
April 2014 to June 2016
January 2011 to February 2014

Ronald L. Litzinger
President, Edison Energy Group, Inc.
Executive Vice President, Edison International
President, SCE

March 2016 to present
October 2014 to March 2016
January 2011 to September 2014



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1 
EME is a wholly-owned subsidiary of Edison International and an affiliate of SCE. EME filed for bankruptcy on December 17, 2012.
2 
EME Reorg Trust was an entity formed as part of the EME bankruptcy to hold creditors' interests after the sale of EME's assets to NRG and is not a parent, affiliate or subsidiary of SCE.
3 
Akin Gump Strauss Hauer & Feld is a global law firm and is not a parent, affiliate or subsidiary of Edison International.

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4 
Macquarie Infrastructure and Real Assets is a global infrastructure management company and is not a parent, affiliate or subsidiary of Edison International.
5 
NRG Energy, Inc. is an integrated energy company and is not a parent, affiliate or subsidiary of Edison International.
6
Los Angeles Department of Water and Power is a municipal water and power utility company and is not a parent, affiliate or subsidiary of Edison International.
EXECUTIVE OFFICERS OF SOUTHERN CALIFORNIA EDISON COMPANY
Executive Officer 
Age at
December 31, 2016February 22, 2018
 Company Position
Kevin M. Payne 5657 Chief Executive Officer
Ronald O. Nichols 6364 President
William M. Petmecky III 4748 Senior Vice President and Chief Financial Officer
Russell C. Swartz 6566 Senior Vice President and General Counsel
Peter T. Dietrich1
Philip R. Herrington
 5255 Senior Vice President, Transmission and Distribution
Stuart R. Hemphill 5354 Senior Vice President, Customer and Operational Services
Caroline Choi 4849 Senior Vice President, Regulatory Affairs
1
Mr. Dietrich left SCE effective January 21, 2017.
As set forth in Article IV of SCE's Bylaws, the elected officers of SCE are chosen annually by, and serve at the pleasure of, SCE's Board of Directors and hold their respective offices until their resignation, removal, other disqualification from service, or until their respective successors are elected. All of the above officers have been actively engaged in the business of SCE, its parent company Edison International, and/or one of SCE's subsidiaries or other affiliates for more than five years, except for Ronald O.Messrs. Nichols and Herrington, and have served in their present positions for the periods stated below. Additionally, those officers who have had other or additional principal positions in the past five years had the following business experience during that period:
Executive Officer Company Position Effective Dates
Kevin M. Payne 
Chief Executive Officer, SCE
Senior Vice President, Customer Service, SCE
Vice President, Engineering and Technical Services, SCE
 
June 2016 to present
March 2014 to June 2016
September 2011 to March 2014
Ronald O. Nichols

 
President, SCE
Senior Vice President, Regulatory Affairs, SCE
General Manager/Chief Executive Officer, Los Angeles Department of Water and Power1
 
June 2016 to present
 April 2014 to June 2016
January 2011 to February 2014

William M. Petmecky III 
Senior Vice President and Chief Financial Officer, SCE
Vice President and Treasurer, SCE
Vice President and Treasurer, EME2
 
September 2016 to present
September 2014 to September 2016
September 2011 to March 2014
Russell C. Swartz Senior Vice President and General Counsel, SCE February 2011 to present
Peter T. DietrichPhilip R. Herrington 
Senior Vice President, Transmission and Distribution, SCE
Chief Nuclear Officer,Vice President, Power Production, SCE
Senior Vice President, SCEUS Competitive Generation/Market Business Lead, The AES Corporation President and Chief Executive Officer, Dayton Power and Light
 
DecemberSeptember 2017 to present
August 2015 to September 2017
July 2013 to January 2017July 2015
December 2010March 2012 to December 2013
November 2010 to December 2013March 2014
Stuart R. Hemphill 
Senior Vice President, Customer and Operational Services, SCE
Senior Vice President, Power Supply and Operational Services, SCE
Senior Vice President, Power Supply, SCE
 
June 2016 to present
July 2014 to June 2016
January 2011 to July 2014
Caroline Choi 
Senior Vice President, Regulatory Affairs, SCE
Vice President Integrated Planning and Environmental Affairs, SCE

 
June 2016 to present
January 2012 to June 2016
1 
Los Angeles Department of Water and Power is a municipal water and power utility company and is not a parent, affiliate or subsidiary of SCE.
2 
EME is a wholly-owned subsidiary of Edison International and an affiliate of SCE. EME filed for bankruptcy on December 17, 2012.

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DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
Information concerning executive officers of Edison International is set forth above under "Executive Officers of Edison International." Information concerning executive officers of SCE is set forth above under "Executive Officers of Southern California Edison Company." Other information responding to this section will appear in Edison International's and SCE's definitiveJoint Proxy Statement under the headings "Item 1: Election of Directors," and is incorporated herein by this reference.
The Edison International Employee Code of Conduct is applicable to all officers and employees of Edison International and its subsidiaries. The Code is available on Edison International's Internet website at www.edisoninvestor.com at "Corporate Governance." Any amendments or waivers of Code provisions for the Company's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, will be posted on Edison International's Internet website at www.edisoninvestor.com.
EXECUTIVE COMPENSATION
Information responding to this section will appear in the Joint Proxy Statement under the headings "Compensation Discussion and Analysis," "Compensation Committee Interlocks and Insider Participation," "Executive Compensation" "Director Compensation" and "Compensation Committee Report," and is incorporated herein by this reference.
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
Information responding to this section will appear in the Joint Proxy Statement under the heading "Our Stock Ownership," and is incorporated herein by this reference.
Equity Compensation Plans
All of Edison International's equity compensation plans that were in effect as of December 31, 20162017 have been approved by security holders. The following table sets forth, for each of Edison International's equity compensation plans, the number of shares of Edison International Common Stock subject to outstanding options, warrants and rights to acquire such stock, the weighted-average exercise price of those outstanding options, warrants and rights, and the number of shares remaining available for future award grants as of December 31, 2016.2017.
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)
Number of securities remaining for future issuance under equity compensation plans (excluding securities reflected in column
(a)(c)
 
Equity compensation plans approved by security holders
12,112,9058,305,488 1
  $50.2658.98
31,986,89930,388,425 2
  
1 
This amount includes 11,544,5017,822,565 shares covered by outstanding stock options, 364,921322,281 shares covered by outstanding restricted stock unit awards, and 203,483160,642 shares covered by outstanding deferred stock unit awards, with the outstanding shares covered by outstanding restricted stock unit and deferred stock unit awards including the crediting of dividend equivalents through December 31, 2016.2017. The weighted-average exercise price of awards outstanding under equity compensation plans approved by security holders reflected in column (b) above is calculated based on the outstanding stock options under these plans as the other forms of awards outstanding have no exercise price. Awards payable solely in cash are not reflected in this table.
2 
This amount is the aggregate number of shares available for new awards under the Edison International 2007 Performance Incentive Plan as of December 31, 2016,2017, and includes shares that have become available from the Edison International Equity Compensation Plan and the Edison International 2000 Equity Plan (together, the "Prior Plans"). However, no additional awards may be granted under the Prior Plans. The maximum number of shares of Edison International Common Stock that may be issued or transferred pursuant to awards under the Edison International 2007 Performance Incentive Plan is 66,000,000 shares, plus the number of any shares subject to awards issued under the Prior Plans and outstanding as of April 26, 2007 that expire, cancel or terminate without being exercised or shares being issued. Shares available under the Edison International 2007 Performance Incentive Plan may generally, subject to certain limits set forth in the plan, be used for any type of award authorized under that plan, including stock options, restricted stock, performance shares, restricted or deferred units, and stock bonuses.
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE
Information responding to this section will appear in the Joint Proxy Statement under the headings "Certain Relationships and Related Transactions," and "Our Corporate Governance—Is SCE subject to the same corporate governance stock exchange rules as EIX?", "—How does the Board determine which directors are independent?", "—Which directors has the Board

124




determined are independent to serve on the Board?" and "Where can I find the Company's corporate governance documents?" and is incorporated herein by this reference.

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PRINCIPAL ACCOUNTANT FEES AND SERVICES
Information responding to this section will appear in the Joint Proxy Statement under the heading "Independent Auditor Fees," and is incorporated herein by this reference.
MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.
Edison International
Edison International Common Stock is traded on the New York Stock Exchange under the symbol "EIX."
Market information responding to this section is included in "Notes to Consolidated Financial Statements—Note 18.17. Quarterly Financial Data (Unaudited)." There are restrictions on the ability of Edison International's subsidiaries to transfer funds to Edison International that materially limit the ability of Edison International to pay cash dividends. Such restrictions are discussed in the MD&A under the heading "Liquidity and Capital Resources—Edison International Parent and Other,SCE—SCE Dividends," and in "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies—SCE Dividend Restrictions." The number of common stockholders of record of Edison International was 35,37532,278 on February 17, 2017.20, 2018. In addition, Edison International cannot pay dividends if it does not meet California law requirements on retained earnings and solvency.
Southern California Edison Company
As a result of the formation of a holding company described under the heading "Business" above, all of the issued and outstanding common stock of SCE is owned by Edison International and there is no market for such stock. Information with respect to frequency and amount of cash dividends is included in "Notes to the Consolidated Financial Statements—Note 17. Quarterly Financial Data (Unaudited)." There are restrictions on SCE's ability to pay dividends to Edison International. Such restrictions are discussed in the MD&A under the heading "Liquidity and Capital Resources—SCE—SCE Dividends," and in "Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies—SCE Dividend Restrictions."
Purchases of Equity Securities by Edison International and Affiliated Purchasers
The following table contains information about all purchases of Edison International Common Stock made by or on behalf of Edison International in the fourth quarter of 2016.2017.
Period
(a) Total
Number of Shares
(or Units)
Purchased1
 
(b) Average
Price Paid per Share (or Unit)1
 
(c) Total
Number of Shares
(or Units)
Purchased
as Part of
Publicly
Announced
Plans or
Programs
 
(d) Maximum
Number (or
Approximate
Dollar Value)
of Shares
(or Units) that May
Yet Be Purchased
Under the Plans or
Programs
October 1, 2016 to October 31, 2016536,660
  $71.70
   
November 1, 2016 to November 30, 2016323,807
  70.36
   
December 1, 2016 to December 31, 2016335,279
  71.43
   
Total1,195,746
  $71.26
   
Period
(a) Total
Number of Shares
(or Units)
Purchased1
 
(b) Average
Price Paid per Share (or Unit)1
 
(c) Total
Number of Shares
(or Units)
Purchased
as Part of
Publicly
Announced
Plans or
Programs
 
(d) Maximum
Number (or
Approximate
Dollar Value)
of Shares
(or Units) that May
Yet Be Purchased
Under the Plans or
Programs
October 1, 2017 to October 31, 201747,999
  $78.25
   
November 1, 2017 to November 30, 2017410,890
  81.45
   
December 1, 2017 to December 31, 2017668,154
  69.63
   
Total1,127,043
  $74.31
   
1 
The shares were purchased by agents acting on Edison International's behalf for delivery to plan participants to fulfill requirements in connection with Edison International's: (i) 401(k) Savings Plan; (ii) Dividend Reinvestment and Direct Stock Purchase Plan; and (iii) long-term incentive compensation plans. The shares were purchased in open-market transactions pursuant to plan terms or participant elections. The shares were never registered in Edison International's name and none of the shares purchased were retired as a result of the transactions.
Purchases of Equity Securities by Southern California Edison and Affiliated Purchasers
Information with respect to frequency and amount of cash dividends is included in "Notes to the Consolidated Financial Statements—Note 18. Quarterly Financial Data (Unaudited)." As a result of the formation of a holding company described under the heading "Business" above, all of the issued and outstanding common stock of SCE is owned by Edison International and there is no market for such stock.
Information on securities authorized for issuance under equity compensation plans, is not applicable because SCE has no compensation plans under which equity securities of SCE are authorized for issuance.

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Comparison of Five-Year Cumulative Total Return
        
 2011
 2012
 2013
 2014
 2015
 2016
 2012
 2013
 2014
 2015
 2016
 2017
Edison International $100
 $112
 $119
 $172
 $160
 $200
 $100
 $105
 $153
 $142
 $178
 $161
S & P 500 Index 100
 116
 154
 175
 177
 198
 100
 132
 150
 153
 171
 208
Philadelphia Utility Index 100
 99
 110
 142
 133
 157
 100
 111
 143
 134
 157
 178
Note: Assumes $100 invested on December 31, 20112012 in stock or index including reinvestment of dividends. Performance of the Philadelphia Utility Index is regularly reviewed by management and the Board of Directors in understanding Edison International's relative performance and is used in conjunction with elements of Edison International's compensation program.
EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
(a)(1) Financial Statements
See Consolidated Financial Statements listed in the Table of Contents of this report.
(a)(2) Report of Independent Registered Public Accounting Firm and Schedules Supplementing Financial Statements
Edison International
The following documents may be found in this report at the indicated page numbers under the headings "Financial Statements and Supplementary Data" and "Exhibits and Financial Statement Schedules" in the Table of Contents of this report.
ReportsReport of Independent Registered Public Accounting Firm - Edison International
Schedule I for SCE and Schedules III through V, inclusive, for both Edison International are omitted as not required or not applicable.
Southern California Edison Company
The following documents may be found in this report at the indicated page numbers under the headings "Financial Statements and Supplementary Data" and "Exhibits and Financial Statement Schedules" in the Table of Contents of this report.
Report of Independent Registered Public Accounting Firm - SCE
Schedules I and III through V, inclusive, for SCE are omitted as not required or not applicable.
(a)(3) Exhibits
See "Exhibit Index" in this report.
126




EXHIBIT INDEX
Exhibit
Number
Description
Edison International
3.1
3.2
Southern California Edison Company
3.3
3.4
Edison International
4.1
Southern California Edison Company
4.2
4.3
Edison International and Southern California Edison Company
10.1**
10.2**
10.3**
10.3.1**
10.3.2**
10.4**
10.5**
10.6**
10.6.1**
10.7**
10.7.1**
10.8**
10.9**

127




Exhibit
Number
Description
10.10**
10.10.1**
10.10.2**
10.10.3**
10.10.4**
10.10.5**
10.10.6**
��
10.10.7**
10.10.8**
10.10.9**

10.10.10**
10.11**
10.12**
10.12.1**
10.13**
10.14**
10.15**
10.16
10.16.1
10.16.2
10.16.3

128




Exhibit
Number
Description
10.16.4
10.16.5
10.17**
10.18**
10.19**
10.19.1**
10.2
10.21
10.22
10.23
10.24
21
23.1
23.2
24.1
24.2
31.1
31.2
32.1
32.2
101.1Financial statements from the annual report on Form 10-K of Edison International for the year ended December 31, 2017, filed on February 22, 2018, formatted in XBRL: (i) the Consolidated Statements of Income; (ii) the Consolidated Statements of Comprehensive Income; (iii) the Consolidated Balance Sheets; (iv) the Consolidated Statements of Cash Flows; (v) Consolidated Statements of Changes in Equity and (vi) the Notes to Consolidated Financial Statements

129




Exhibit
Number
Description
101.2Financial statements from the annual report on Form 10-K of Southern California Edison Company for the year ended December 31, 2017, filed on February 22, 2018, formatted in XBRL: (i) the Consolidated Statements of Income; (ii) the Consolidated Statements of Comprehensive Income; (iii) the Consolidated Balance Sheets; (iv) the Consolidated Statements of Cash Flows; (v) Consolidated Statements of Changes in Equity and (vi) the Notes to Consolidated Financial Statements

*Incorporated by reference pursuant to Rule 12b-32.
**Indicates a management contract or compensatory plan or arrangement, as required by Item 15(a)(3).
Edison International and SCE will furnish a copy of any exhibit listed in the accompanying Exhibit Index upon written request and upon payment to Edison International or SCE of their reasonable expenses of furnishing such exhibit, which shall be limited to photocopying charges and, if mailed to the requesting party, the cost of first-class postage.

118130




SCHEDULES SUPPLEMENTING FINANCIAL STATEMENTS


EDISON INTERNATIONAL
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
CONDENSED BALANCE SHEETS
December 31,December 31,
(in millions)2016 20152017 2016
Assets:      
Cash and cash equivalents$6
 $7
$524
 $6
Other current assets261
 259
340
 261
Total current assets267
 266
864
 267
Investments in subsidiaries13,459
 12,696
13,659
 13,459
Deferred income taxes646
 626
500
 646
Other long-term assets108
 110
91
 108
Total assets$14,480
 $13,698
$15,114
 $14,480
Liabilities and equity:      
Short-term debt$539
 $646
$1,139
 $539
Current portion of long-term debt400
 214

 400
Other current liabilities484
 368
467
 484
Total current liabilities1,423
 1,228
1,606
 1,423
Long-term debt397
 398
1,193
 397
Other long-term liabilities664
 704
644
 664
Total equity11,996
 11,368
11,671
 11,996
Total liabilities and equity$14,480
 $13,698
$15,114
 $14,480

119131




EDISON INTERNATIONAL
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
CONDENSED STATEMENTS OF INCOME
For the Years Ended December 31, 2017, 2016, 2015 and 20142015
(in millions)2016 2015 20142017 2016 2015
Interest income from affiliates$6
 $3
 $3
$
 $6
 $3
Operating expenses and interest expense86
 78
 94
92
 86
 78
Loss before equity in earnings of subsidiaries(80) (75) (91)(92) (80) (75)
Equity in earnings of subsidiaries1,337
 1,025
 1,482
739
 1,337
 1,025
Income before income taxes1,257
 950
 1,391
647
 1,257
 950
Income tax benefit(42) (35) (36)
Income tax expense (benefit)82
 (42) (35)
Income from continuing operations1,299
 985
 1,427
565
 1,299
 985
Income from discontinued operations, net of tax12
 35
 185

 12
 35
Net income$1,311
 $1,020
 $1,612
$565
 $1,311
 $1,020

CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2017, 2016, 2015 and 20142015
(in millions)2016 2015 20142017 2016 2015
Net income$1,311
 $1,020
 $1,612
$565
 $1,311
 $1,020
Other comprehensive income (loss), net of tax3
 2
 (45)
Other comprehensive income, net of tax10
 3
 2
Comprehensive income$1,314
 $1,022
 $1,567
$575
 $1,314
 $1,022


120132




EDISON INTERNATIONAL
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
CONDENSED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2017, 2016, 2015 and 20142015
(in millions)2016 2015 20142017 2016 2015
Net cash provided by (used in) operating activities$493
 $641
 $(73)
Net cash provided by operating activities$462
 $493
 $641
Cash flows from financing activities:          
Long-term debt issued400
 
 
798
 400
 
Long-term debt issuance costs(3) 
 
(5) (3) 
Long-term debt matured(400) 
 
Payable due to affiliates34
 54
 66
8
 34
 54
Short-term debt financing, net(108) 26
 584
600
 (108) 26
Settlements of stock-based compensation, net(44) (42) (24)
Payments for stock-based compensation(260) (95) (114)
Receipts for stock-based compensation144
 51
 72
Dividends paid(626) (544) (463)(707) (626) (544)
Net cash (used in) provided by financing activities(347) (506) 163
Net cash provided by (used in) financing activities178
 (347) (506)
Capital contributions to affiliate(147) (30) (35)(122) (147) (30)
Loans to affiliate
 (106) (60)
 
 (106)
Net cash used in investing activities:(147) (136) (95)(122) (147) (136)
Net decrease in cash and cash equivalents(1) (1) (5)
Net increase (decrease) in cash and cash equivalents518
 (1) (1)
Cash and cash equivalents, beginning of year7
 8
 13
6
 7
 8
Cash and cash equivalents, end of year$6
 $7
 $8
$524
 $6
 $7
Note 1. Basis of Presentation
The accompanying condensed financial statements of Edison International Parent should be read in conjunction with the consolidated financial statements and notes thereto of Edison International and subsidiaries ("Registrant") included in this Form 10-K. Edison International's Parent significant accounting policies are consistent with those of the Registrant, SCE and other wholly owned and controlled subsidiaries.
Dividends Received
Edison International Parent received cash dividends from SCE of $701$573 million,$701 million and $758 million in 2017, 2016 and $3782015, respectively. During the fourth quarter of 2017, SCE declared a dividend to Edison International of $212 million, in 2016, 2015 and 2014, respectively. which was paid on January 31, 2018.
Dividend Restrictions
The CPUC regulates SCE's capital structure which limits the dividends it may pay Edison International. Under CPUC regulations, SCE may make distributions to Edison International as long as the common equity component of SCE's capital structure remains at or above the 48% on a 13-month weighted13-month average basis.basis, or otherwise satisfies the CPUC requirements.
If the Revised San Onofre Settlement Agreement is approved by the CPUC, SCE may exclude the $448 million after-tax charge resulting from the implementation of the Revised San Onofre Settlement Agreement from its ratemaking capital structure. At December 31, 2016,2017, without excluding the $448 million after-tax charge, SCE's 13-month weighted-average13-month average common equity component of total capitalization was 50.4%50.0% and the maximum additional dividend that SCE could pay to Edison International under this limitation was approximately $585511 million, resulting in a restriction on SCE's net assets of approximately $13.914.2 billion. If the Revised San Onofre Settlement Agreement had been approved by the CPUC at December 31, 2017, the common equity component of SCE's capital structure would have been 50.1% on a 13-month average basis.


133




Note 2. Debt and Credit Agreements
Long-Term Debt
During the first quarter of 2016,2017, Edison International Parent issued $400 million of 2.95%2.125% senior notes due in 2023.2020. The proceeds from these bonds were used to repay commercial paper borrowings and for general corporate purposes. In August 2017, Edison International issued $400 million of 2.40% senior notes due in 2022. In addition, at December 31, 2017 and 2016, and 2015,respectively, Edison International Parent had $400 million of 2.95% senior notes due in 2023 and $400 million of 3.75% senior notes, outstanding of $400 million, which matureswere paid in 2017.

121




September 2017 with the proceeds from the August 2017 issuance as discussed above.
Credit Agreements and Short-Term Debt
The following table summarizes the status of the credit facility at December 31, 2017:
(in millions) 
Commitment$1,250
Outstanding borrowings(1,139)
Amount available$111
During the thirdsecond quarter of 2016,2017, Edison International Parent amended the credit facility to extend the maturity date for the $1.25 billion credit facility to July 2021.2022. At December 31, 2017, the outstanding commercial paper, net of discount, was $639 million at a weighted-average interest rate of 1.70%. This commercial paper was supported by the $1.25 billion multi-year revolving credit facility. In December 2017, Edison International Parent borrowed $500 million from the credit facility which had an interest rate of 2.56% on December 31, 2017. In January 2018, Edison International repaid its $500 million borrowings with cash on hand. At December 31, 2016, the outstanding commercial paper, net of discount, was $538 million at a weighted-average interest rate of 0.97%. This short-term debt was supported by
In January 2018, Edison International Parent borrowed $500 million under a Term Loan Agreement due in January 2019, with a variable interest rate based on the $1.25 billion multi-year revolving credit facility. At December 31, 2015, the outstandingLondon Interbank Offered Rate plus 60 basis points. The proceeds were used to repay Edison International Parent's commercial paper was $646 million at a weighted-average interest rate of 0.78%.
The following table summarizes the status of the credit facility at December 31, 2016:
(in millions) 
Commitment$1,250
Outstanding borrowings(538)
Amount available$712
borrowings discussed above.
The debt covenant in Edison International's credit facility requires a consolidated debt to total capitalization ratio of less than or equal to 0.65 to 1. At December 31, 2016,2017, Edison International's consolidated debt to total capitalization ratio was 0.470.51 to 1.
Note 3. Related-Party Transactions
Edison International's Parent expense from services provided by SCE was $3 million annually in 2017, 2016 2015 and 2014.2015. Edison International's Parent interest expense from loans due to affiliates was $5 million in 2017, $3 million in 2016 and $6 million in 2015 and $1 million in 2014.2015. Edison International Parent had current related-party receivables of $262$256 million and $252$262 million and current related-party payables of $221$235 million and $149$221 million at December 31, 2017 and 2016, and 2015, respectively. During 2017, a related-party note receivable of $184 million was converted into a capital contribution. Edison International Parent had long-term related-party receivables of $103$81 million and $105$103 million at December 31, 20162017 and 2015,2016, respectively, and long-term related-party payables of $243$200 million and $213$243 million at December 31, 20162017 and 2015,2016, respectively.
Note 4. Contingencies
For a discussion of material contingencies see "Notes to Consolidated Financial Statements—Note 7. Income Taxes,"Taxes" and "—Note 11. Commitments and Contingencies."


122
134




EDISON INTERNATIONAL
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS
  Additions      Additions    
(in millions)
Balance at
Beginning of
Period
 
Charged to
Costs and
Expenses
 
Charged to
Other
Accounts
 Deductions 
Balance at
End of
Period
Balance at
Beginning of
Period
 
Charged to
Costs and
Expenses
 
Charged to
Other
Accounts
 Deductions 
Balance at
End of
Period
For the Year ended December 31, 2017         
Allowance for uncollectible accounts         
Customers$41.2
 $12.9
 $
 $17.5
 $36.6
All others20.6
 13.5
 
 16.8
 17.3
Total allowance for uncollectible amounts$61.8
 $26.4
 $
 $34.3
a 
$53.9
Tax valuation allowance$24.0
 $
 $4.0
c 
$
 $28.0

         
For the Year ended December 31, 2016                  
Allowance for uncollectible accounts                  
Customers$46.2
 $17.7
 $
 $22.7
 $41.2
$46.2
 $17.7
 $
 $22.7
 $41.2
All others15.5
 15.9
 
 10.8
 20.6
15.5
 15.9
 
 10.8
 20.6
Total allowance for uncollectible amounts$61.7
 $33.6
 $
 $33.5
a 
$61.8
$61.7
 $33.6
 $
 $33.5
a 
$61.8
Tax valuation allowance$32.0
 $
 $
 $8.0
d 
$24.0
$32.0
 $
 $
 $8.0
b 
$24.0

                  
For the Year ended December 31, 2015                  
Allowance for uncollectible accounts                  
Customers$48.9
 $23.9
 $
 $26.6
 $46.2
$48.9
 $23.9
 $
 $26.6
 $46.2
All others23.3
 18.0
 
 25.8
 15.5
23.3
 18.0
 
 25.8
 15.5
Total allowance for uncollectible amounts$72.2
 $41.9
 $
 $52.4
a 
$61.7
$72.2
 $41.9
 $
 $52.4
a 
$61.7
Tax valuation allowance$29.0
 $3.0
 $
 $
 $32.0
$29.0
 $3.0
 $
 $
 $32.0

         
For the Year ended December 31, 2014         
Allowance for uncollectible accounts         
Customers$52.2
 $24.1
 $
 $27.4
 $48.9
All others17.8
 19.7
 
 14.2
 23.3
Total allowance for uncollectible amounts$70.0
 $43.8
 $
 $41.6
a 
$72.2
Tax valuation allowance$1,380.0
b 
$
 $
 $1,351.0
c 
$29.0
a 
Accounts written off, net.
b
Edison International recorded deferred tax assets of $2.2 billion related to net operating losses and tax carryforwards that pertain to Edison International's consolidated or combined federal and state tax returns, including approximately $1.6 billion related to EME. Edison International continues to consolidate EME for federal and certain combined state tax returns. EME's Plan of Reorganization, filed in December 2013 ("December Plan of Reorganization"), provides for the transfer of EIX's ownership interest to the creditors, which would result in a tax deconsolidation of EME. Under federal and state tax regulations, the tax deconsolidation of EME would reduce the amounts of net operating loss and tax credits carryforwards that Edison International would be eligible to use in future periods. As a result of the EME's December Plan of Reorganization, which would result in a tax deconsolidation of EME, Edison International has recorded a $1.380 billion valuation allowance based on the estimated amount of such benefits as calculated under the applicable federal and state tax regulations as of December 31, 2013. The deferred income tax benefits recognized by Edison International less the valuation allowance for amounts that would no longer be available upon tax deconsolidation of EME was approximately $220 million.
c
On April 1, 2014, under the Amended Plan of Reorganization, EME emerged from bankruptcy free of liabilities but remained an indirect wholly-owned subsidiary of Edison International, which will continue to be consolidated with Edison International for income tax purposes. Edison International anticipates realization of the federal and California tax benefits before they expire. Therefore, the valuation allowance on federal and California tax benefits that Edison International recorded in 2013 was released in 2014. The remaining valuation allowance is related to non California state tax benefits.
d 
In 2016, Edison International determined that $8 million of the assets subject to a valuation allowance had no expectation of recovery and were written off.
c
As a result of Tax Reform, Edison International recorded an additional valuation allowance of $4 million for non-California state net operating loss carryforwards estimated to expire unused.


123135




SOUTHERN CALIFORNIA EDISON COMPANY
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS
  Additions      Additions    
(in millions)
Balance at
Beginning of
Period
 
Charged to
Costs and
Expenses
 
Charged to
Other
Accounts
 Deductions 
Balance at
End of
Period
Balance at
Beginning of
Period
 
Charged to
Costs and
Expenses
 
Charged to
Other
Accounts
 Deductions 
Balance at
End of
Period
For the Year ended December 31, 2017         
For the Year ended         
Customers$40.5
 $12.9
 $
 $17.4
 $36.0
All others20.6
 13.5
 
 16.8
 17.3
Total allowance for uncollectible accounts$61.1
 $26.4
 $
 $34.2
a 
$53.3
         
For the Year ended December 31, 2016                  
For the Year ended         
Allowance for uncollectible accounts         
Customers$46.2
 $17.0
 $
 $22.7
 $40.5
$46.2
 $17.0
 $
 $22.7
 $40.5
All others15.5
 15.9
 
 10.8
 20.6
15.5
 15.9
 
 10.8
 20.6
Total allowance for uncollectible accounts$61.7
 $32.9
 $
 $33.5
a 
$61.1
$61.7
 $32.9
 $
 $33.5
a 
$61.1
                  
For the Year ended December 31, 2015                  
Allowance for uncollectible accounts                  
Customers$48.9
 $23.9
 $
 $26.6
 $46.2
$48.9
 $23.9
 $
 $26.6
 $46.2
All others18.7
 18.0
 
 21.2
 15.5
18.7
 18.0
 
 21.2
 15.5
Total allowance for uncollectible accounts$67.6
 $41.9
 $
 $47.8
a 
$61.7
$67.6
 $41.9
 $
 $47.8
a 
$61.7
         
For the Year ended December 31, 2014         
Allowance for uncollectible accounts         
Customers$52.2
 $24.1
 $
 $27.4
 $48.9
All others13.3
 19.6
 
 14.2
 18.7
Total allowance for uncollectible accounts$65.5
 $43.7
 $
 $41.6
a 
$67.6
a 
Accounts written off, net.


124136




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.
 EDISON INTERNATIONAL  SOUTHERN CALIFORNIA EDISON COMPANY
     
By:/s/ Aaron D. Moss By:/s/ Connie J. EricksonAaron D. Moss
     
 
Aaron D. Moss
Vice President and Controller
(Duly Authorized Officer and
Principal Accounting Officer)
  
Connie J. EricksonAaron D. Moss
Vice President and Controller
(Duly Authorized Officer and
Principal Accounting Officer)
     
Date:February 21, 201722, 2018 Date:February 21, 201722, 2018

125137




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 registrants and in the capacities and on the date indicated.
Signature Title
   
A. Principal Executive Officers  
   
Pedro J. Pizarro* 
President,
Chief Executive Officer and Director
(Edison International)
   
Kevin Payne* Chief Executive Officer and SCE Director (Southern California Edison Company)
   
B. Principal Financial Officers  
   
Maria Rigatti* 
Executive Vice President and Chief Financial Officer
(Edison International)
   
William M. Petmecky III* 
Senior Vice President and Chief Financial Officer
(Southern California Edison Company)
   
C. Principal Accounting Officers  
   
Aaron D. Moss 
Vice President and Controller
(Edison International)
   
Connie J. Erickson
Aaron D. Moss

 
Vice President and Controller
(Southern California Edison Company)
   
D. Directors (Edison International and Southern California Edison Company, unless otherwise noted)  
   
Jagjeet S. Bindra*Michael C. Camuñez* Director
   
Vanessa C.L. Chang* Director
   
Louis Hernandez, Jr.* Director
James T. Morris* Director
Pedro J. Pizarro* Director
   
Kevin Payne (SCE only)* Director
   
RichardTimothy T. Schlosberg, III*O’Toole* Director
   
Linda G. Stuntz* Director
   
William P. Sullivan* Chair of the Edison International Board and Director
   
Ellen O. Tauscher* Director
   
Peter J. Taylor* Director
   
Brett White* Director
    
    
*By:/s/ Aaron D. Moss*By:/s/ Connie J. EricksonAaron D. Moss
    
 
Aaron D. Moss
Vice President and Controller
(Attorney-in-fact for EIX Directors and Officers)
 
Connie J. EricksonAaron D. Moss
Vice President and Controller
(Attorney-in-fact for SCE Directors and Officers)
    
Date:February 21, 201722, 2018Date:February 21, 201722, 2018

126138




EXHIBIT INDEX
Exhibit
Number
Description
Edison International
3.1Certificate of Restated Articles of Incorporation of Edison International, effective December 19, 2006 (File No. 1-9936, filed as Exhibit 3.1 to Edison International's Form 10-K for the year ended December 31, 2006)*
3.2Bylaws of Edison International, as amended October 27, 2016 (File No. 1-9936, filed as Exhibit 3.1 to Edison International's Form 10-Q dated November 1, 2016 and filed November 1, 2016)*
Southern California Edison Company
3.3Restated Articles of Incorporation of Southern California Edison Company, effective March 2, 2006, together with all Certificates of Determination of Preference Stock issued since March 2, 2006 (File No. 1-2313 filed as Exhibit 3.1 to Southern California Edison Company's Form 10-Q for the quarter ended March 31, 2016)*
3.4Bylaws of Southern California Edison Company, as amended October 27, 2016 (File No. 1-2313, filed as Exhibit 3.2 to Southern California Edison Company's Form 10-Q dated November 1, 2016 and filed November 1, 2016)*
Edison International
4.1Senior Indenture, dated September 10, 2010 (File No. 1-9936, filed as Exhibit 4.1 to Edison International's Form 10-Q for the quarter ended September 30, 2010)*
��
Southern California Edison Company
4.2Southern California Edison Company First Mortgage Bond Trust Indenture, dated as of October 1, 1923 (File No. 1-2313, filed as Exhibit 4.2 to Southern California Edison Company's Form 10-K for the year ended December 31, 2010)*
4.3Southern California Edison Company Indenture, dated as of January 15, 1993 (File No. 1-2313, Form 8-K dated January 28, 1993)*
Edison International
10.1**Edison International Director Deferred Compensation Plan as amended effective June 19, 2014 (File No. 1-9936, filed as Exhibit 10.3 for the quarter ended June 30, 2014)*
10.2**Edison International 2008 Director Deferred Compensation Plan, as amended and restated effective June 19, 2014 (File No. 1-9936, filed as Exhibit No. 10.2 for the quarter ended June 30, 2014)*
10.3**Director Grantor Trust Agreement, dated August 1995 (File No. 1-9936, filed as Exhibit 10.10 to Edison International's Form 10-K for the year ended December 31, 1995)*
10.3.1**Director Grantor Trust Agreement Amendment 2002-1, effective May 14, 2002 (File No. 1-9936, filed as Exhibit 10.4 to Edison International's Form 10-Q for the quarter ended June 30, 2002)*
10.3.2**Executive and Director Grantor Trust Agreements Amendment 2008-1 (File No. 1-9936, filed as Exhibit No. 10.6.2 to Edison International's Form 10-K for the year ended December 31, 2008)*
10.4**Edison International Executive Deferred Compensation Plan, as amended and restated effective June 19, 2014 (File No. 1-9936, filed as Exhibit 10.4 for the quarter ended June 30, 2014)*
10.5**Edison International 2008 Executive Deferred Compensation Plan, as amended and restated effective December 9, 2015* (File No. 1-9936, filed as Exhibit No. 10.5 to Edison International's Form 10-K for the year ended December 31, 2015)*
10.6**Executive Grantor Trust Agreement, dated August 1995 (File No. 1-9936, filed as Exhibit 10.12 to Edison International's Form 10-K for the year ended December 31, 1995)*
10.6.1**Executive Grantor Trust Agreement Amendment 2002-1, effective May 14, 2002 (File No. 1-9936, filed as Exhibit 10.3 to Edison International's Form 10-Q for the quarter ended June 30, 2002)*
10.7**Southern California Edison Company Executive Supplemental Benefit Program, as amended effective August 24, 2016 (File No. 1-9936, filed as Exhibit No. 10.3 for the quarter ended September 30, 2016)*
10.8**Southern California Edison Company Executive Retirement Plan, as amended effective June 19, 2014 (File No. 1-9936, filed as Exhibit 10.7 for the quarter ended June 30, 2014)*
10.8.1**Edison International 2008 Executive Retirement Plan, as amended and restated effective August 24, 2016 (File No. 1-9936, filed as Exhibit No. 10.1 to Edison International's Form 10-Q for the quarter ended September 30, 2016)*

127




Exhibit
Number
Description
10.9**Edison International Executive Incentive Compensation Plan, as amended and restated effective August 24, 2016 (File No. 1-9936, filed as Exhibit No. 10.2 to Edison International's Form 10-Q for the quarter ended September 30, 2016)*
10.10**Edison International 2008 Executive Disability Plan, as amended and restated effective January 1, 2016 (File No. 1-9936, filed as Exhibit No. 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2016)*
10.11**Edison International 2008 Executive Survivor Benefit Plan, as amended and restated effective June 19, 2014 (File No. 1-9936, filed as Exhibit No. 10.10 to Edison International's Form 10-Q for the quarter ended June 30, 2014)*
10.11.1**Termination of Edison International 2008 Executive Survivor Benefit Plan, adopted on December 9, 2015* (File No. 1-9936, filed as Exhibit No. 10.11.1 to Edison International's Form 10-K for the year ended December 31, 2015)*
10.12**Retirement Plan for Directors, as amended and restated effective December 31, 2008 (File No. 1-9936 filed as Exhibit No. 10.17 to Edison International's Form 10-K for the year ended December 31, 2008)*
10.13**Equity Compensation Plan as restated effective January 1, 1998 (File No. 1-9936, filed as Exhibit 10.1 to Edison International's Form 10-Q for the quarter ended June 30, 1998)*
10.13.1**Equity Compensation Plan Amendment No. 1, effective May 18, 2000 (File No. 1-9936, filed as Exhibit 10.4 to Edison International's Form 10-Q for the quarter ended June 30, 2000)*
10.13.2**Amendment of Equity Compensation Plans, adopted October 25, 2006 (File No. 1-9936, filed as Exhibit 10.52 to Edison International's Form 10-K for the year ended December 31, 2006)*
10.14**2000 Equity Plan, effective May 18, 2000 (File No. 1-9936, filed as Exhibit 10.1 to Edison International's Form 10-Q for the quarter ended June 30, 2000)*
10.15**Edison International 2007 Performance Incentive Plan as amended and restated effective May 2, 2016 (File No. 1-9936, filed as Exhibit 10.1 to the Edison International Form 10-Q for the quarter ended June 30, 2016)*
10.15.1**Edison International 2008 Long-Term Incentives Terms and Conditions (File No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2008)*
10.15.2**Edison International 2009 Long-Term Incentives Terms and Conditions (File No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2009)*
10.15.3**Edison International 2010 Long-Term Incentives Terms and Conditions (File No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2010)*
10.15.4**Edison International 2011 Long-Term Incentives Terms and Conditions (File No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2011)*
10.15.5**Edison International 2012 Long-Term Incentives Terms and Conditions (File No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2012)*
10.15.6**Edison International 2013 Long-Term Incentives Terms and Conditions (File No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2013)*
10.15.7**Edison International 2014 Long-Term Incentives Terms and Conditions (File, No. 1-9936, filed as Exhibit 10.3 to Edison International's Form 10-Q for the quarter ended March 31, 2014)*
10.15.8**Edison International 2015 Long-Term Incentives Terms and Conditions (File, No. 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2015)*
10.15.9**
Edison International 2016 Long-Term Incentives Terms and Conditions (File, No. 1-9936, filed as Exhibit 10.4 to Edison International's Form 10-Q for the quarter ended March 31, 2016)*

10.16**Terms and conditions for 2006 long-term compensation awards under the Equity Compensation Plan and 2000 Equity Plan (File No. 1-9936, filed as Exhibit 10.29 to Edison International's Form 10-K for the year ended December 31, 2005)*
10.16.1**Terms and conditions for 2007 long-term compensation awards under the Equity Compensation Plan and the 2007 Performance Incentive Plan (File No. 1-9936, filed as Exhibit 10.1 to Edison International's Form 10-Q for the quarter ended March 31, 2007)*
10.17**Director Nonqualified Stock Option Terms and Conditions under the 2007 Performance Incentive Plan (File 1-9936, filed as Exhibit 10.2 to Edison International's Form 10-Q for the quarter ended March 31, 2007)*

128




Exhibit
Number
Description
10.18**Edison International and Edison Mission Energy Affiliate Option Exchange Offer Summary of Deferred Compensation Alternatives, dated July 3, 2000 (File No. 1-13434, filed as Exhibit 10.94 to the Edison Mission Energy's Form 10-K for the year ended December 31, 2001)*
10.18.1**Edison International and Edison Mission Energy Affiliate Option Exchange Offer Circular, dated July 3, 2000 (File No. 1-13434, filed as Exhibit 10.93 to the Edison Mission Energy's Form 10-K for the year ended December 31, 2001)*
10.19**Edison International 2008 Executive Severance Plan, as amended and restated effective August 24, 2016 (File No. 1-9936, filed as Exhibit 10.5 for the quarter ended September 30, 2016)*
10.20**Edison International and Southern California Edison Company Director Compensation Schedule, as adopted August 25, 2016 (File No. 1-9936, filed as Exhibit 10.4 to Edison International's Form 10-Q for the quarter ended September 30, 2016)*
10.21**Edison International Director Matching Gifts Program, as adopted June 24, 2010 (File No. 1-9936, filed as Exhibit 10.1 to Edison International's Form 10-Q for the quarter ended June 30, 2010*
10.22**Edison International Director Nonqualified Stock Options 2005 Terms and Conditions (File No. 1-9936, filed as Exhibit 99.3 to Edison International's Form��8-K dated May 19, 2005, and filed on May 25, 2005)*
10.23Amended and Restated Agreement for the Allocation of Income Tax Liabilities and Benefits among Edison International, Southern California Edison Company and The Mission Group dated September 10, 1996 (File No. 1-9936, filed as Exhibit 10.3 to Edison International's Form 10-Q for the quarter ended September 30, 2002)*
10.23.1Amended and Restated Tax-Allocation Agreement among The Mission Group and its first-tier subsidiaries dated September 10, 1996 (File No. 1-9936, filed as Exhibit 10.3.1 to Edison International's Form 10-Q for the quarter ended September 30, 2002)*
10.23.2Amended and Restated Tax-Allocation Agreement between Edison Capital and Edison Funding Company (formerly Mission First Financial and Mission Funding Company) dated May 1, 1995 (File No. 1-9936, filed as Exhibit 10.3.2 to Edison International's Form 10-Q for the quarter ended September 30, 2002)*
10.23.3Amended and Restated Tax-Allocation Agreement between Mission Energy Holding Company and Edison Mission Energy dated February 13, 2012 (File No. 333-68630, filed as Exhibit 10.11 to Edison Mission Energy's Form 10-K for the year ended December 31, 2011)*
10.23.4Modification No. 1 to the Amended and Restated Tax-Allocation Agreement between Mission Energy Holding Company and Edison Mission Energy dated February 13, 2012 (File No. 333-68630, filed as Exhibit 10.1 to Edison Mission Energy's Form 8-K dated November 15, 2012 and filed November 21, 2012)*
10.23.5Amended and Restated Administrative Agreement Re Tax Allocation Payments, dated February 13, 2012, among Edison International and subsidiary parties. (File No. 333-68630, filed as Exhibit 10.12 to Edison Mission Energy's Form 10-K for the year ended December 31, 2011)*
10.24**Form of Indemnity Agreement between Edison International and its Directors and any officer, employee or other agent designated by the Board of Directors (File No. 1-9936, filed as Exhibit 10.5 to Edison International's Form 10-Q for the period ended June 30, 2005, and filed on August 9, 2005)*
10.25**Edison International 2016 Executive Annual Incentive Program (File No. 1-9936, filed as Exhibit 10.3 to Edison International's Form 10-Q for the quarter ended March 31, 2016)*
10.26**Section 409A and Other Conforming Amendments to Terms and Conditions (File No. 1-9936, filed as Exhibit No. 10.37 to Edison International's Form 10-K for the year ended December 31, 2008)*
10.26.1**Section 409A Amendments to Director Terms and Conditions (File No. 1-9936, filed as Exhibit No. 10.37.1 to Edison International's Form 10-K for the year ended December 31, 2008)*
10.27Amended and Restated Credit Agreement, dated as of July 14, 2015 among Edison International and the Lenders named therein (File 1-9936, filed as Exhibit 10.1 to Edison International's Form 8-K dated July 14, 2015 and filed July 17, 2015)*
10.28Amended and Restated Credit Agreement, dated as of July 14, 2015, among Southern California Edison Company and the Lenders named therein (File 1-2313, filed as Exhibit 10.2 to Southern California Edison Company's Form 8-K dated July 14, 2015 and filed July 17, 2015)*
10.29Term Loan Credit Agreement, dated as of January 13, 2017, among Southern California Edison Company, the several banks and other financial institutions from time to time parties thereto, and Wells Fargo Bank, N.A., as administrative agent for the lenders (File 1-2313, filed as Exhibit 10.1 to Southern California Edison Company's Form 8-K dated January 13, 2017 and filed January 13, 2017)*

129




Exhibit
Number
Description
10.30Amended and Restated Settlement Agreement between Southern California Edison Company, San Diego Gas & Electric Company, the Office of Ratepayer Advocates, The Utility Reform Network, Friends of the Earth, and the Coalition of California Utility Employees, dated September 23, 2014 (File No. 1-9936, filed as Exhibit 10.1 to Edison International's Form 10-Q for the quarter ended September 30, 2014)*
21Subsidiaries of the Registrants
23.1Consent of Independent Registered Public Accounting Firm (Edison International)
23.2Consent of Independent Registered Public Accounting Firm (Southern California Edison Company)
24.1Powers of Attorney of Edison International and Southern California Edison Company
24.2Certified copies of Resolutions of Boards of Edison International and Southern California Edison Company Directors Authorizing Execution of SEC Reports
31.1Certifications of the Chief Executive Officer and Chief Financial Officer of Edison International pursuant to Section 302 of the Sarbanes-Oxley Act
31.2Certifications of the Chief Executive Officer and Chief Financial Officer of Southern California Edison Company pursuant to Section 302 of the Sarbanes-Oxley Act
32.1Certifications of the Chief Executive Officer and the Chief Financial Officer of Edison International required by Section 906 of the Sarbanes-Oxley Act
32.2Certifications of the Chief Executive Officer and the Chief Financial Officer of Southern California Edison Company required by Section 906 of the Sarbanes-Oxley Act
101.1Financial statements from the annual report on Form 10-K of Edison International for the year ended December 31, 2016, filed on February 21, 2017, formatted in XBRL: (i) the Consolidated Statements of Income; (ii) the Consolidated Statements of Comprehensive Income; (iii) the Consolidated Balance Sheets; (iv) the Consolidated Statements of Cash Flows; (v) Consolidated Statements of Changes in Equity and (vi) the Notes to Consolidated Financial Statements
101.2Financial statements from the annual report on Form 10-K of Southern California Edison Company for the year ended December 31, 2016, filed on February 21, 2017, formatted in XBRL: (i) the Consolidated Statements of Income; (ii) the Consolidated Statements of Comprehensive Income; (iii) the Consolidated Balance Sheets; (iv) the Consolidated Statements of Cash Flows; (v) Consolidated Statements of Changes in Equity and (vi) the Notes to Consolidated Financial Statements

*Incorporated by reference pursuant to Rule 12b-32.
**Indicates a management contract or compensatory plan or arrangement, as required by Item 15(a)(3).

130