Document_And_Entity_Informatio
Document And Entity Information (USD $) | 12 Months Ended | ||
Dec. 31, 2014 | Jan. 30, 2015 | Jun. 30, 2014 | |
Document Information [Line Items] | |||
Entity Registrant Name | OKLAHOMA GAS & ELECTRIC CO | ||
Entity Central Index Key | 74145 | ||
Current Fiscal Year End Date | -19 | ||
Entity Filer Category | Non-accelerated Filer | ||
Document Type | 10-K | ||
Document Period End Date | 31-Dec-14 | ||
Document Fiscal Year Focus | 2014 | ||
Document Fiscal Period Focus | FY | ||
Amendment Flag | FALSE | ||
Entity Common Stock, Shares Outstanding | 40,378,745 | ||
Entity Well-known Seasoned Issuer | No | ||
Entity Voluntary Filers | No | ||
Entity Current Reporting Status | Yes | ||
Entity Public Float | $0 |
STATEMENTS_OF_INCOME
STATEMENTS OF INCOME (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
OPERATING REVENUES | $2,453.10 | $2,262.20 | $2,141.20 |
COST OF SALES | 1,106.60 | 965.9 | 879.1 |
OPERATING EXPENSES | |||
Other operation and maintenance | 453.2 | 438.8 | 446.3 |
Depreciation and amortization | 270.8 | 248.4 | 248.7 |
Taxes other than income | 84.5 | 83.8 | 77.7 |
Total operating expenses | 808.5 | 771 | 772.7 |
OPERATING INCOME | 538 | 525.3 | 489.4 |
OTHER INCOME (EXPENSE) | |||
Allowance for borrowed funds used during construction | 4.2 | 6.6 | 6.2 |
Other income | 4.8 | 8.1 | 8.2 |
Other expense | -1.9 | -4.6 | -4.3 |
Net other income | 7.1 | 10.1 | 10.1 |
INTEREST EXPENSE | |||
Interest on long-term debt | 139.7 | 130.6 | 124.2 |
Allowance for borrowed funds used during construction | -2.4 | -3.4 | -3.5 |
Interest on short-term debt and other interest charges | 4.2 | 2.1 | 3.9 |
Interest expense | 141.5 | 129.3 | 124.6 |
INCOME BEFORE TAXES | 403.6 | 406.1 | 374.9 |
INCOME TAX EXPENSE | 111.6 | 113.5 | 94.6 |
NET INCOME | $292 | $292.60 | $280.30 |
STATEMENTS_OF_COMPREHENSIVE_IN
STATEMENTS OF COMPREHENSIVE INCOME (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Net income | $292 | $292.60 | $280.30 |
Other comprehensive income (loss), net of tax | |||
Deferred commodity contracts hedging losses, net of tax of $0.0, $0.8 and $0.7, respectively | 0 | 1.3 | 1.2 |
Comprehensive income | $292 | $293.90 | $281.50 |
STATEMENTS_OF_COMPREHENSIVE_IN1
STATEMENTS OF COMPREHENSIVE INCOME Parenthetical (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Other comprehensive income (loss), net of tax | |||
Deferred commodity contracts hedging losses reclassified in net income | $0 | $0.80 | $0.70 |
STATEMENTS_OF_CASH_FLOWS
STATEMENTS OF CASH FLOWS (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
CASH FLOWS FROM OPERATING ACTIVITIES | |||
Net income | $292 | $292.60 | $280.30 |
Adjustments to reconcile net income to net cash provided from operating activities | |||
Depreciation and amortization | 270.8 | 248.4 | 248.7 |
Deferred Income Taxes and Tax Credits | 161.4 | 116.1 | 103.3 |
Allowance for equity funds used during construction | -4.2 | -6.6 | -6.2 |
Stock-based compensation expense | 2.9 | 2.3 | 2.6 |
Regulatory assets | -4.6 | -26.8 | -20.3 |
Regulatory liabilities | -4.4 | -32.5 | -14.8 |
Other assets | -1.2 | 10 | -4.5 |
Other liabilities | 14 | -6.2 | -28.7 |
Change in certain current assets and liabilities | |||
Accounts receivable, net | -9.4 | -17.9 | 20.9 |
Accrued unbilled revenues | 3.2 | -1.3 | 1.9 |
Fuel, materials and supplies inventories | 20.1 | -2.3 | 6.5 |
Fuel clause under recoveries | -42.1 | -26.2 | 1.8 |
Other current assets | -2.6 | 2.7 | -6.6 |
Accounts payable | -66.4 | 49.4 | 9.7 |
Accounts payable - affiliates | -1.5 | 1.1 | -0.6 |
Income taxes payable - parent | -50.2 | 2.9 | -7.1 |
Fuel clause over recoveries | -0.4 | -108.8 | 101.5 |
Other current liabilities | 1.1 | -5.4 | 8.4 |
Net Cash Provided from Operating Activities | 587.7 | 545.1 | 737.4 |
CASH FLOWS FROM INVESTING ACTIVITIES | |||
Capital expenditures (less allowance for equity funds used during construction) | -565.4 | -797.6 | -704.4 |
Proceeds from sale of assets | 0.7 | 0.8 | 0.6 |
Reimbursement of capital expenditures | 0 | 0 | 27.5 |
Net Cash Used in Investing Activities | -564.7 | -796.8 | -676.3 |
CASH FLOWS FROM FINANCING ACTIVITIES | |||
Proceeds from long-term debt | 489.6 | 247.4 | 0 |
Dividends paid on common stock | -140 | -120 | -75 |
Payment of long-term debt | -140.2 | -0.1 | -0.1 |
Changes in advances with parent | 232.4 | -124.4 | -14 |
Net Cash (Used in) Provided from Financing Activities | -23 | 251.7 | -61.1 |
NET CHANGE IN CASH AND CASH EQUIVALENTS | 0 | 0 | 0 |
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | 0 | 0 | 0 |
CASH AND CASH EQUIVALENTS AT END OF PERIOD | $0 | $0 | $0 |
BALANCE_SHEETS
BALANCE SHEETS (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
CURRENT ASSETS | ||
Accounts receivable, less reserve of $1.6 and $1.9, respectively | $188.80 | $179.40 |
Accrued unbilled revenues | 55.5 | 58.7 |
Advances to parent | 215.6 | 0 |
Fuel inventories | 58.5 | 74.4 |
Materials and supplies, at average cost | 77.9 | 79.4 |
Deferred income taxes | 170.8 | 189.2 |
Fuel clause under recoveries | 68.3 | 26.2 |
Other | 34.5 | 31.9 |
Total current assets | 869.9 | 639.2 |
OTHER PROPERTY AND INVESTMENTS | 2.9 | 2.6 |
PROPERTY, PLANT AND EQUIPMENT | ||
In service | 9,835.60 | 9,036.40 |
Construction work in progress | 111.6 | 462.8 |
Total property, plant and equipment | 9,947.20 | 9,499.20 |
Less accumulated depreciation | 3,005.70 | 2,864.60 |
Net property, plant and equipment | 6,941.50 | 6,634.60 |
DEFERRED CHARGES AND OTHER ASSETS | ||
Regulatory assets | 411.5 | 379.1 |
Other | 40.4 | 39.4 |
Total deferred charges and other assets | 451.9 | 418.5 |
TOTAL ASSETS | 8,266.20 | 7,694.90 |
CURRENT LIABILITIES | ||
Accounts payable - affiliates | 0.3 | 1.8 |
Accounts payable - other | 163 | 237.2 |
Advances from parent | 0 | 87.2 |
Customer deposits | 73.7 | 70.9 |
Accrued taxes | 38.8 | 38 |
Accrued interest | 42.9 | 42.8 |
Accrued compensation | 22.6 | 30 |
Other | 51.6 | 47.2 |
Total current liabilities | 392.9 | 555.1 |
LONG-TERM DEBT | 2,655.30 | 2,300.20 |
DEFERRED CREDITS AND OTHER LIABILITIES | ||
Accrued benefit obligations | 178.3 | 149 |
Deferred income taxes | 1,686.60 | 1,545.20 |
Regulatory liabilities | 263 | 234.2 |
Other | 85.9 | 81.9 |
Total deferred credits and other liabilities | 2,213.80 | 2,010.30 |
Total liabilities | 5,262 | 4,865.60 |
COMMITMENTS AND CONTINGENCIES (NOTE 12) | ||
STOCKHOLDER'S EQUITY | ||
Common stockholder's equity | 1,019.20 | 1,016.30 |
Retained earnings | 1,985 | 1,813 |
Total stockholder's equity | 3,004.20 | 2,829.30 |
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY | $8,266.20 | $7,694.90 |
BALANCE_SHEETS_Parenthetical
BALANCE SHEETS Parenthetical (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Accounts receivable reserve | $1.60 | $1.90 |
STATEMENTS_OF_CAPITALIZATION
STATEMENTS OF CAPITALIZATION (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Stockholder's Equity [Abstract] | ||
Common stock, par value $2.50 per share; authorized 100.0 shares; and outstanding 40.4 and 40.4 shares, respectively | $100.90 | $100.90 |
Premium on common stock | 918.3 | 915.4 |
Retained earnings | 1,985 | 1,813 |
Total stockholder's equity | 3,004.20 | 2,829.30 |
Total long-term debt | 2,655.30 | 2,300.20 |
Total capitalization | 5,659.50 | 5,129.50 |
OG&E [Member] | ||
Stockholder's Equity [Abstract] | ||
Unamortized discount | -10.3 | -5.5 |
OG&E [Member] | Series Due January 15, 2016 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 110 | 110 |
Debt, Weighted Average Interest Rate | 5.15% | |
OG&E [Member] | Series Due July 15, 2017 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 125 | 125 |
Debt, Weighted Average Interest Rate | 6.50% | |
OG&E [Member] | Series Due September 1, 2018 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 250 |
Debt, Weighted Average Interest Rate | 6.35% | |
OG&E [Member] | Series Due January 15, 2019 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 250 |
Debt, Weighted Average Interest Rate | 8.25% | |
OG&E [Member] | Series Due July 15, 2027 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 125 | 125 |
Debt, Weighted Average Interest Rate | 6.65% | |
OG&E [Member] | Series Due April 15, 2028 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 100 | 100 |
Debt, Weighted Average Interest Rate | 6.50% | |
OG&E [Member] | Series Due August 1, 2034 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 0 | 140 |
Debt, Weighted Average Interest Rate | 6.50% | |
OG&E [Member] | Series Due January 15, 2036 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 110 | 110 |
Debt, Weighted Average Interest Rate | 5.75% | |
OG&E [Member] | Series Due February 1, 2038 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 200 | 200 |
Debt, Weighted Average Interest Rate | 6.45% | |
OG&E [Member] | Series Due June 1, 2040 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 250 |
Debt, Weighted Average Interest Rate | 5.85% | |
OG&E [Member] | Senior Notes due May 15, 2041 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 250 |
Debt, Weighted Average Interest Rate | 5.25% | |
OG&E [Member] | Series due May 1, 2043 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 250 |
Debt, Weighted Average Interest Rate | 3.90% | |
OG&E [Member] | Series due March 15, 2044 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 0 |
Debt, Weighted Average Interest Rate | 4.55% | |
OG&E [Member] | Series due December 15, 2044 [Member] | Senior Notes [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 250 | 0 |
Debt, Weighted Average Interest Rate | 4.00% | |
OG&E [Member] | Due August 31, 2062 [Member] | Long-term Debt [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 10.2 | 10.3 |
Debt, Weighted Average Interest Rate | 3.70% | |
Debentures Subject to Mandatory Redemption [Member] | ||
Stockholder's Equity [Abstract] | ||
Total long-term debt | 135.4 | |
Debentures Subject to Mandatory Redemption [Member] | OG&E [Member] | Garfield Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 47 | 47 |
Debentures Subject to Mandatory Redemption [Member] | OG&E [Member] | Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | 32.4 | 32.4 |
Debentures Subject to Mandatory Redemption [Member] | OG&E [Member] | Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] | ||
Stockholder's Equity [Abstract] | ||
Long term debt, gross | $56 | $56 |
STATEMENTS_OF_CAPITALIZATION_P
STATEMENTS OF CAPITALIZATION (Parenthetical) (USD $) | 12 Months Ended | |
In Millions, except Per Share data, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 |
Common Stock, Par or Stated Value Per Share | 2.5 | $2.50 |
Common Stock, Shares Authorized | 100 | 100 |
Common Stock, Shares, Outstanding | 40.4 | 40.4 |
Garfield Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument, Maturity Date | 1-Jan-25 | |
Garfield Industrial Authority Bond, Due January 1, 2025 [Member] | Debentures Subject to Mandatory Redemption [Member] | ||
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum | 0.07% | |
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum | 0.20% | |
Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument, Maturity Date | 1-Jan-25 | |
Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] | Debentures Subject to Mandatory Redemption [Member] | ||
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum | 0.07% | |
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum | 0.18% | |
Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] | ||
Debt Instrument, Maturity Date | 1-Jun-27 | |
Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] | Debentures Subject to Mandatory Redemption [Member] | ||
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum | 0.04% | |
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum | 0.15% | |
Senior Notes [Member] | OG&E [Member] | Series Due January 15, 2016 [Member] | ||
Debt Instrument, Maturity Date | 15-Jan-16 | |
Senior Notes [Member] | OG&E [Member] | Series Due July 15, 2017 [Member] | ||
Debt Instrument, Maturity Date | 15-Jul-17 | |
Senior Notes [Member] | OG&E [Member] | Series Due September 1, 2018 [Member] | ||
Debt Instrument, Maturity Date | 1-Sep-18 | |
Senior Notes [Member] | OG&E [Member] | Series Due January 15, 2019 [Member] | ||
Debt Instrument, Maturity Date | 15-Jan-19 | |
Senior Notes [Member] | OG&E [Member] | Series Due July 15, 2027 [Member] | ||
Debt Instrument, Maturity Date | 15-Jul-27 | |
Senior Notes [Member] | OG&E [Member] | Series Due April 15, 2028 [Member] | ||
Debt Instrument, Maturity Date | 15-Apr-28 | |
Senior Notes [Member] | OG&E [Member] | Series Due August 1, 2034 [Member] | ||
Debt Instrument, Maturity Date | 1-Aug-34 | |
Senior Notes [Member] | OG&E [Member] | Series Due January 15, 2036 [Member] | ||
Debt Instrument, Maturity Date | 15-Jan-36 | |
Senior Notes [Member] | OG&E [Member] | Series Due February 1, 2038 [Member] | ||
Debt Instrument, Maturity Date | 1-Feb-38 | |
Senior Notes [Member] | OG&E [Member] | Series Due June 1, 2040 [Member] | ||
Debt Instrument, Maturity Date | 1-Jun-40 | |
Senior Notes [Member] | OG&E [Member] | Senior Notes due May 15, 2041 [Member] | ||
Debt Instrument, Maturity Date | 15-May-41 | |
Senior Notes [Member] | OG&E [Member] | Series due May 1, 2043 [Member] | ||
Debt Instrument, Maturity Date | 1-May-43 | |
Senior Notes [Member] | OG&E [Member] | Series due March 15, 2044 [Member] | ||
Debt Instrument, Maturity Date | 15-Mar-44 | |
Senior Notes [Member] | OG&E [Member] | Series due December 15, 2044 [Member] | ||
Debt Instrument, Maturity Date | 15-Dec-44 | |
Long-term Debt [Member] | OG&E [Member] | Due August 31, 2062 [Member] | ||
Debt Instrument, Maturity Date | 31-Aug-62 |
STATEMENTS_OF_CHANGES_IN_STOCK
STATEMENTS OF CHANGES IN STOCKHOLDER'S EQUITY (USD $) | Total | Common Stock | Premium on Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) |
In Millions, unless otherwise specified | |||||
Balance at Dec. 31, 2011 | $2,494 | $100.90 | $910.50 | $1,485.10 | ($2.50) |
Comprehensive income (loss) | |||||
Net income | 280.3 | 0 | 0 | 280.3 | 0 |
Other comprehensive income, net of tax | 1.2 | 0 | 0 | 0 | 1.2 |
Dividends declared on common stock | -75 | 0 | 0 | -75 | 0 |
Stock-based compensation | 2.6 | 0 | 2.6 | 0 | 0 |
Balance at Dec. 31, 2012 | 2,703.10 | 100.9 | 913.1 | 1,690.40 | -1.3 |
Comprehensive income (loss) | |||||
Net income | 292.6 | 0 | 0 | 292.6 | 0 |
Other comprehensive income, net of tax | 1.3 | 0 | 0 | 0 | 1.3 |
Dividends declared on common stock | -170 | 0 | 0 | -170 | 0 |
Stock-based compensation | 2.3 | 0 | 2.3 | 0 | 0 |
Balance at Dec. 31, 2013 | 2,829.30 | 100.9 | 915.4 | 1,813 | 0 |
Comprehensive income (loss) | |||||
Net income | 292 | 0 | 0 | 292 | 0 |
Dividends declared on common stock | -120 | 0 | 0 | -120 | 0 |
Stock-based compensation | 2.9 | 0 | 2.9 | 0 | 0 |
Balance at Dec. 31, 2014 | $3,004.20 | $100.90 | $918.30 | $1,985 | $0 |
Summary_of_Significant_Account
Summary of Significant Accounting Policies | 12 Months Ended | |||||||||||
Dec. 31, 2014 | ||||||||||||
Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||||||||||
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | Organization | |||||||||||
OG&E generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. Its operations are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory. OG&E is the largest electric utility in Oklahoma and its franchised service territory includes the Fort Smith, Arkansas area. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business. OG&E is a wholly-owned subsidiary of OGE Energy, an energy and energy services provider offering physical delivery and related services for both electricity and natural gas primarily in the south central United States. | ||||||||||||
Basis of Presentation | ||||||||||||
In the opinion of management, all adjustments necessary to fairly present the financial position of OG&E at December 31, 2014 and 2013 and the results of its operations and cash flows for the years ended December 31, 2014, 2013 and 2012, have been included and are of a normal recurring nature except as otherwise disclosed. | ||||||||||||
Accounting Records | ||||||||||||
The accounting records of OG&E are maintained in accordance with the Uniform System of Accounts prescribed by the FERC and adopted by the OCC and the APSC. Additionally, OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. | ||||||||||||
OG&E records certain incurred costs and obligations as regulatory assets or liabilities if it is probable, based on regulatory orders or other available evidence, that the cost or obligation will be included in amounts allowable for recovery or refund in future rates. | ||||||||||||
The following table is a summary of OG&E's regulatory assets and liabilities at: | ||||||||||||
December 31 (In millions) | 2014 | 2013 | ||||||||||
Regulatory Assets | ||||||||||||
Current | ||||||||||||
Fuel clause under recoveries | $ | 68.3 | $ | 26.2 | ||||||||
Oklahoma demand program rider under recovery (A) | 19.7 | 10.6 | ||||||||||
Crossroads wind farm rider under recovery (A) | — | 4.7 | ||||||||||
Other (A) | 9.1 | 7.3 | ||||||||||
Total Current Regulatory Assets | $ | 97.1 | $ | 48.8 | ||||||||
Non-Current | ||||||||||||
Benefit obligations regulatory asset | $ | 261.1 | $ | 227.4 | ||||||||
Income taxes recoverable from customers, net | 56.1 | 56.5 | ||||||||||
Smart Grid | 43.9 | 44.2 | ||||||||||
Deferred storm expenses | 17.5 | 21.6 | ||||||||||
Unamortized loss on reacquired debt | 16.1 | 11.8 | ||||||||||
Pension tracker | — | 1.4 | ||||||||||
Other | 16.8 | 16.2 | ||||||||||
Total Non-Current Regulatory Assets | $ | 411.5 | $ | 379.1 | ||||||||
Regulatory Liabilities | ||||||||||||
Current | ||||||||||||
Smart Grid rider over recovery (B) | $ | 12.5 | $ | 16.7 | ||||||||
Crossroads wind farm rider over recovery (B) | 10.3 | — | ||||||||||
Other (B) | 1.6 | 3.5 | ||||||||||
Total Current Regulatory Liabilities | $ | 24.4 | $ | 20.2 | ||||||||
Non-Current | ||||||||||||
Accrued removal obligations, net | $ | 248.1 | $ | 227.7 | ||||||||
Pension tracker | 14.9 | — | ||||||||||
Deferred pension credits | — | 6.5 | ||||||||||
Total Non-Current Regulatory Liabilities | $ | 263 | $ | 234.2 | ||||||||
(A) | Included in Other Current Assets on the Balance Sheets. | |||||||||||
(B) | Included in Other Current Liabilities on the Balance Sheets. | |||||||||||
Fuel clause under recoveries are generated from under recoveries from OG&E's customers when OG&E's cost of fuel exceeds the amount billed to its customers. Fuel clause over recoveries are generated from over recoveries from OG&E's customers when the amount billed to its customers exceeds OG&E's cost of fuel. OG&E's fuel recovery clauses are designed to smooth the impact of fuel price volatility on customers' bills. As a result, OG&E under recovers fuel costs in periods of rising fuel prices above the baseline charge for fuel and over recovers fuel costs when prices decline below the baseline charge for fuel. Provisions in the fuel clauses are intended to allow OG&E to amortize under and over recovery balances. | ||||||||||||
OG&E recovers program costs related to the Demand and Energy Efficiency Program. An extension of the demand program rider was approved in December 2012, which allows for the recovery of demand program costs, lost revenues associated with certain achieved energy, demand savings and performance based incentives and the recovery of costs associated with research and development investments through December 2015. | ||||||||||||
OG&E recovers a return on the capital expenditures along with operation and maintenance expense and depreciation expense related to the Crossroads wind farm through riders established by the OCC and APSC. OG&E began recovery in the fourth quarter of 2011 in Oklahoma and June of 2013 in Arkansas, and believes the rider will continue until new rates are implemented in OG&E's next general rate case in each jurisdiction. | ||||||||||||
The benefit obligations regulatory asset is comprised of expenses recorded which are probable of future recovery and that have not yet been recognized as components of net periodic benefit cost, including net loss and prior service cost. These expenses are recorded as a regulatory asset as OG&E had historically recovered and currently recovers pension and postretirement benefit plan expense in its electric rates. If, in the future, the regulatory bodies indicate a change in policy related to the recovery of pension and postretirement benefit plan expenses, this could cause the benefit obligations regulatory asset balance to be reclassified to Accumulated other comprehensive income. | ||||||||||||
The following table is a summary of the components of the benefit obligations regulatory asset at: | ||||||||||||
December 31 (In millions) | 2014 | 2013 | ||||||||||
Pension Plan and Restoration of Retirement Income Plan | ||||||||||||
Net loss | $ | 196.7 | $ | 178.4 | ||||||||
Prior service cost | 0.6 | 2.5 | ||||||||||
Postretirement Benefit Plans | ||||||||||||
Net loss | 83.6 | 79.9 | ||||||||||
Prior service cost | (19.8 | ) | (33.4 | ) | ||||||||
Total | $ | 261.1 | $ | 227.4 | ||||||||
The following amounts in the benefit obligations regulatory asset at December 31, 2014 are expected to be recognized as components of net periodic benefit cost in 2015: | ||||||||||||
(In millions) | ||||||||||||
Pension Plan and Restoration of Retirement Income Plan | ||||||||||||
Net loss | $ | 12.7 | ||||||||||
Prior service cost | 0.5 | |||||||||||
Postretirement Benefit Plans | ||||||||||||
Net loss | 11.8 | |||||||||||
Prior service cost | (13.7 | ) | ||||||||||
Total | $ | 11.3 | ||||||||||
Income taxes recoverable from customers, which represents income tax benefits previously used to reduce OG&E's revenues, are treated as regulatory assets and liabilities and are being amortized over the estimated remaining life of the assets to which they relate. These amounts are being recovered in rates as the temporary differences that generated the income tax benefit turn around. The income tax related regulatory assets and liabilities are netted in Income taxes recoverable from customers, net in the regulatory assets and liabilities table above. | ||||||||||||
OG&E recovers the cost of system-wide deployment of smart grid technology and implementing the smart grid pilot program, the incremental costs for web portal access, education and providing home energy reports. These amounts are currently being recovered through a rider which will remain in effect until the smart grid project costs are included in base rates in OG&E's next general rate case. Costs not included in the rider are the incremental costs for web portal access, education and home energy reports, which are capped at $6.9 million, and the stranded costs associated with OG&E's analog electric meters, which have been replaced by smart meters, which were accumulated during the smart grid deployment and have been included in the Smart Grid asset in the Regulatory Assets/Liabilities table above. These costs are expected to be recovered in base rates in OG&E's next general rate case. | ||||||||||||
OG&E defers annual Oklahoma storm-related operation and maintenance expenses in excess of $2.7 million and includes in expense any Oklahoma storm-related operation and maintenance expenses up to $2.7 million. OG&E will recover the amounts deferred each year, over a five-year period. | ||||||||||||
Unamortized loss on reacquired debt is comprised of unamortized debt issuance costs related to the early retirement of OG&E's long-term debt. These amounts are recorded in interest expenses and are being amortized over the term of the long-term debt which replaced the previous long-term debt. The unamortized loss on reacquired debt is not included in OG&E's rate base and does not otherwise earn a rate of return. | ||||||||||||
Accrued removal obligations represent asset retirement costs previously recovered from ratepayers for other than legal obligations. | ||||||||||||
OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate cases. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate case as a regulatory asset or regulatory liability. These amounts have been recorded in the Pension tracker in the regulatory assets and liabilities table above. | ||||||||||||
Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets, which could have significant financial effects. | ||||||||||||
Use of Estimates | ||||||||||||
In preparing the Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the Financial Statements and the reported amounts of revenues and expenses during the reporting period. Changes to these assumptions and estimates could have a material effect on OG&E's Financial Statements. However, OG&E believes it has taken reasonable positions where assumptions and estimates are used in order to minimize the negative financial impact to OG&E that could result if actual results vary from the assumptions and estimates. In management's opinion, the areas of OG&E where the most significant judgment is exercised includes the determination of Pension Plan assumptions, income taxes, contingency reserves, asset retirement obligations, and depreciable lives of property, plant and equipment, the existence of regulatory assets and liabilities and unbilled revenues. | ||||||||||||
Cash and Cash Equivalents | ||||||||||||
For purposes of the Financial Statements, OG&E considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. These investments are carried at cost, which approximates fair value. | ||||||||||||
Allowance for Uncollectible Accounts Receivable | ||||||||||||
Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is calculated by multiplying the last six months of electric revenue by the provision rate. The provision rate is based on a 12-month historical average of actual balances written off. To the extent the historical collection rates are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. The allowance for uncollectible accounts receivable was $1.6 million and $1.9 million at December 31, 2014 and 2013, respectively. | ||||||||||||
New business customers are required to provide a security deposit in the form of cash, bond or irrevocable letter of credit that is refunded when the account is closed. New residential customers, whose outside credit scores indicate an elevated risk, are required to provide a security deposit that is refunded based on customer protection rules defined by the OCC and the APSC. The payment behavior of all existing customers is continuously monitored and, if the payment behavior indicates sufficient risk within the meaning of the applicable utility regulation, customers will be required to provide a security deposit. | ||||||||||||
Fuel Inventories | ||||||||||||
Fuel inventories for the generation of electricity consist of coal, natural gas and oil. OG&E uses the weighted-average cost method of accounting for inventory that is physically added to or withdrawn from storage or stockpiles. The amount of fuel inventory was $66.7 million and $74.4 million at December 31, 2014 and 2013, respectively. Effective May 1, 2014, the gas storage services agreement with Enable was terminated. As a result of this contract termination, approximately 5.3 BCF of cushion gas owned by OG&E on the Enable system is being directed to OG&E's power plants over a five year period during peak time of June 1 to August 31 at a rate of 11,500 MMBtu/day for a total of 1.06 Bcf per year. Therefore, approximately $11.0 million of cushion gas was reclassified from Plant-in-Service to Deferred Charges and Other Assets and an additional $2.7 million was reclassified to current Fuel Inventories on the Balance Sheets. As of December 31, 2014, the balance of cushion gas in Other Assets is approximately $8.2 million. | ||||||||||||
Property, Plant and Equipment | ||||||||||||
All property, plant and equipment is recorded at cost. Newly constructed plant is added to plant balances at cost which includes contracted services, direct labor, materials, overhead, transportation costs and the allowance for funds used during construction. Replacements of units of property are capitalized as plant. For assets that belong to a common plant account, the replaced plant is removed from plant balances and the cost of such property is charged to Accumulated Depreciation. For assets that do not belong to a common plant account, the replaced plant is removed from plant balances with the related accumulated depreciation and the remaining balance net of any salvage proceeds is recorded as a loss in the Statements of Income as Other Expense. Repair and replacement of minor items of property are included in the Statements of Income as Other Operation and Maintenance Expense. | ||||||||||||
The table below presents OG&E's ownership interest in the jointly-owned McClain Plant and the jointly-owned Redbud Plant, and, as disclosed below, only OG&E's ownership interest is reflected in the property, plant and equipment and accumulated depreciation balances in these tables. The owners of the remaining interests in the McClain Plant and the Redbud Plant are responsible for providing their own financing of capital expenditures. Also, only OG&E's proportionate interests of any direct expenses of the McClain Plant and the Redbud Plant such as fuel, maintenance expense and other operating expenses are included in the applicable financial statement captions in the Statement of Income. | ||||||||||||
December 31, 2014 (In millions) | Percentage Ownership | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | ||||||||
McClain Plant (A) | 77 | % | $ | 207.7 | $ | 46.6 | $ | 161.1 | ||||
Redbud Plant (A)(B) | 51 | % | $ | 484.1 | $ | 81.8 | $ | 402.3 | ||||
(A) | Construction work in progress was $0.5 million and $0.4 million for the McClain and Redbud Plants, respectively. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million. | |||||||||||
December 31, 2013 (In millions) | Percentage Ownership | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | ||||||||
McClain Plant (A) | 77 | % | $ | 183.2 | $ | 62.8 | $ | 120.4 | ||||
Redbud Plant (A)(B) | 51 | % | $ | 498.9 | $ | 89.7 | $ | 409.2 | ||||
(A) | Construction work in progress was $0.1 million and $39.5 million for the McClain and Redbud Plants, respectively. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million. | |||||||||||
OG&E's property, plant and equipment and related accumulated depreciation are divided into the following major classes at: | ||||||||||||
December 31, 2014 (In millions) | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | |||||||||
Distribution assets | $ | 3,559.50 | $ | 1,086.70 | $ | 2,472.80 | ||||||
Electric generation assets (A) | 3,620.10 | 1,345.10 | 2,275.00 | |||||||||
Transmission assets (B) | 2,370.00 | 417.8 | 1,952.20 | |||||||||
Intangible plant | 67.6 | 31.1 | 36.5 | |||||||||
Other property and equipment | 330 | 125 | 205 | |||||||||
Total property, plant and equipment | $ | 9,947.20 | $ | 3,005.70 | $ | 6,941.50 | ||||||
(A) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $0.4 million. | |||||||||||
December 31, 2013 (In millions) | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | |||||||||
Distribution assets | $ | 3,403.80 | $ | 1,028.20 | $ | 2,375.60 | ||||||
Electric generation assets (A) | 3,551.00 | 1,306.10 | 2,244.90 | |||||||||
Transmission assets (B) | 2,163.70 | 385 | 1,778.70 | |||||||||
Intangible plant | 50.5 | 27.1 | 23.4 | |||||||||
Other property and equipment | 330.2 | 118.2 | 212 | |||||||||
Total property, plant and equipment | $ | 9,499.20 | $ | 2,864.60 | $ | 6,634.60 | ||||||
(A) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $0.3 million. | |||||||||||
The unamortized computer software costs were $33.6 million and $16.8 million at December 31, 2014 and 2013, respectively. In 2014, 2013 and 2012, amortization expense for computer software costs was $5.2 million, $4.0 million and $4.2 million, respectively. | ||||||||||||
Depreciation and Amortization | ||||||||||||
The provision for depreciation, which was 2.8 percent of the average depreciable utility plant for both 2014 and 2013, is provided on a straight-line method over the estimated service life of the utility assets. Depreciation is provided at the unit level for production plant and at the account or sub-account level for all other plant, and is based on the average life group method. In 2015, the provision for depreciation is projected to be 2.8 percent of the average depreciable utility plant. Amortization of intangible assets is computed using the straight-line method. Of the remaining amortizable intangible plant balance at December 31, 2014, 96.0 percent will be amortized over 9 years with 4.0 percent of the remaining amortizable intangible plant balance at December 31, 2014 being amortized over 26 years. Amortization of plant acquisition adjustments is provided on a straight-line basis over the estimated remaining service life of the acquired asset. Plant acquisition adjustments include $148.3 million for the Redbud Plant, which are being amortized over a 27-year life and $3.3 million for certain substation facilities in OG&E's service territory, which are being amortized over a 37 to 59-year period. | ||||||||||||
Asset Retirement Obligations | ||||||||||||
OG&E has previously recorded asset retirement obligations that are being amortized over their respective lives ranging from 4 to 74 years. | ||||||||||||
The following table summarizes changes to OG&E's asset retirement obligations during the years ended December 31, 2014 and 2013. | ||||||||||||
(In millions) | 2014 | 2013 | ||||||||||
Balance at January 1 | $ | 55.2 | $ | 53.6 | ||||||||
Liabilities settled | (0.8 | ) | — | |||||||||
Accretion expense | 2.5 | 2.3 | ||||||||||
Revisions in estimated cash flows | 1.7 | (0.7 | ) | |||||||||
Balance at December 31 | $ | 58.6 | $ | 55.2 | ||||||||
Allowance for Funds Used During Construction | ||||||||||||
Allowance for funds used during construction is calculated according to the FERC pronouncements for the imputed cost of equity and borrowed funds. Allowance for funds used during construction, a non-cash item, is reflected as an increase to net other income and a reduction to interest expense in the Statements of Income and as an increase to Construction Work in Progress in the Balance Sheets. Allowance for funds used during construction rates, compounded semi-annually, were 6.92 percent, 8.33 percent and 8.93 percent for the years ended December 31, 2014, 2013 and 2012, respectively. The decrease in the allowance for funds used during construction rates in 2014 was primarily due to two factors. First, an increase in the average daily balance of short-term debt resulted in less equity being required to finance construction projects, which caused the equity portion of allowance for funds using during construction to decrease. Second, that same increase in the average daily balance of short-term debt allowed the interest and fixed commercial paper fees to be lower per dollar of short term debt, resulting in a lower short term debt rate which caused the debt portion of allowance for funds used during construction to decrease. | ||||||||||||
Collection of Sales Tax | ||||||||||||
In the normal course of its operations, OG&E collects sales tax from its customers. OG&E records a current liability for sales taxes when it bills its customers and eliminates this liability when the taxes are remitted to the appropriate governmental authorities. OG&E excludes the sales tax collected from its operating revenues. | ||||||||||||
Revenue Recognition | ||||||||||||
General | ||||||||||||
OG&E reads its customers' meters and sends bills to its customers throughout each month. As a result, there is a significant amount of customers' electricity consumption that has not been billed at the end of each month. Unbilled revenue is presented in Accrued Unbilled Revenues on the Balance Sheets and in Operating Revenues on the Statements of Income based on estimates of usage and prices during the period. The estimates that management uses in this calculation could vary from the actual amounts to be paid by customers. | ||||||||||||
SPP Purchases and Sales | ||||||||||||
OG&E currently owns and operates transmission and generation facilities as part of a vertically integrated utility. OG&E is a member of the SPP regional transmission organization and has transferred operational authority, but not ownership, of OG&E's transmission facilities to the SPP. On March 1, 2014, the SPP implemented FERC approved regional day ahead and real-time markets for energy and operating services, as well as associated transmission congestion rights. Collectively the three markets operate together under the global name, SPP Integrated Marketplace. OG&E represents owned and contracted generation assets, and customer load in the SPP Integrated Marketplace for the sole benefit of its customers. OG&E has not participated in the SPP Integrated Marketplace for any speculative trading activities. OG&E records SPP Integrated Marketplace transactions as sales or purchases per FERC Order 668, which requires that purchases and sales be recorded on a net basis for each settlement period of the SPP Integrated Marketplace. These results are reported as Operating Revenues or Cost of Goods Sold in its Financial Statements. OG&E revenues, expenses, assets and liabilities may be adversely affected by changes in the organization, operating and regulation by the FERC or the SPP. | ||||||||||||
Fuel Adjustment Clauses | ||||||||||||
The actual cost of fuel used in electric generation and certain purchased power costs are passed through to OG&E's customers through fuel adjustment clauses. The fuel adjustment clauses are subject to periodic review by the OCC, the APSC and the FERC. The OCC, the APSC and the FERC have authority to review the appropriateness of gas transportation charges or other fees OG&E pays to its affiliate, Enable. | ||||||||||||
Income Taxes | ||||||||||||
OG&E is a member of an affiliated group that files consolidated income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. Income taxes are generally allocated to each company in the affiliated group based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and are being amortized to income over the life of the related property. OG&E uses the asset and liability method of accounting for income taxes. Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carry forwards and net operating loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change. OG&E recognizes interest related to unrecognized tax benefits in interest expense and recognizes penalties in other expense. | ||||||||||||
Accrued Vacation | ||||||||||||
OG&E accrues vacation pay monthly by establishing a liability for vacation earned. Vacation may be taken as earned and is charged against the liability. At the end of each year, the liability represents the amount of vacation earned, but not taken. | ||||||||||||
Environmental Costs | ||||||||||||
Accruals for environmental costs are recognized when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are charged to expense or deferred as a regulatory asset based on expected recovery from customers in future rates, if they relate to the remediation of conditions caused by past operations or if they are not expected to mitigate or prevent contamination from future operations. Where environmental expenditures relate to facilities currently in use, such as pollution control equipment, the costs may be capitalized and depreciated over the future service periods. Estimated remediation costs are recorded at undiscounted amounts, independent of any insurance or rate recovery, based on prior experience, assessments and current technology. Accrued obligations are regularly adjusted as environmental assessments and estimates are revised, and remediation efforts proceed. For sites where OG&E has been designated as one of several potentially responsible parties, the amount accrued represents OG&E's estimated share of the cost. OG&E had $7.5 million and $6.2 million in accrued environmental liabilities at December 31, 2014 and 2013, respectively, which are included in the asset retirement obligations table. |
Accounting_Pronouncement
Accounting Pronouncement | 12 Months Ended |
Dec. 31, 2014 | |
Accounting Pronouncement [Abstract] | |
New Accounting Pronouncements and Changes in Accounting Principles [Text Block] | Accounting Pronouncement |
In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers" (ASC Topic 606). The new standard provides guidance for all revenue arising from contracts with customers and provides a model for the measurement and recognition of gains and losses arising from the sale of certain nonfinancial assets such as property and equipment, including real estate. The core principle of the revenue model is that an entity should recognize revenue at an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring goods or services to a customer. The principles of the standard will be applied in five steps: | |
1. Identify the contract(s) with a customer | |
2. Identify the performance obligations in the contract | |
3. Determine the transaction price | |
4. Allocate the transaction price to the performance obligations in the contract | |
5. Recognize revenue when (or as) the entity satisfies a performance obligation | |
The new guidance is effective for fiscal years beginning after December 15, 2016 and must be adopted using either a full retrospective approach for all periods presented or a modified retrospective approach. Early adoption is not permitted. OG&E is currently evaluating the potential impact the adoption will have on its financial statements. |
RelatedParty_Transactions_Note
Related-Party Transactions (Notes) | 12 Months Ended | |||||||||
Dec. 31, 2014 | ||||||||||
Related Party Transaction [Line Items] | ||||||||||
Related Party Transactions Disclosure [Text Block] | Related Party Transactions | |||||||||
OGE Energy charged operating costs to OG&E of $120.3 million, $120.1 million and $118.4 million in 2014, 2013 and 2012, respectively. OGE Energy charges operating costs to OG&E based on several factors. Operating costs directly related to OG&E are assigned as such. Operating costs incurred for the benefit of OG&E are allocated either as overhead based primarily on labor costs or using the "Distrigas" method. | ||||||||||
The following table summarizes related party transactions between OG&E and its affiliate, Enable, during 2014, 2013 and 2012. | ||||||||||
Year Ended December 31, | ||||||||||
(In millions) | 2014 | 2013 | 2012 | |||||||
Operating Revenues: | ||||||||||
Electricity to power electric compression assets | $ | 13.3 | $ | 10.2 | $ | 12.4 | ||||
Cost of Sales: | ||||||||||
Natural gas transportation services | $ | 34.9 | $ | 34.8 | $ | 34.8 | ||||
Natural gas storage services | 4.4 | 12.9 | 12.9 | |||||||
Natural gas purchases | 8.7 | 22.4 | 20.4 | |||||||
In 2014, 2013 and 2012, OG&E declared dividends to OGE Energy of $120.0 million, $170.0 million and $75.0 million, respectively. |
Fair_Value_Measurements
Fair Value Measurements | 12 Months Ended | ||||||||||||
Dec. 31, 2014 | |||||||||||||
Fair Value Disclosures [Abstract] | |||||||||||||
Fair Value Measurements | Fair Value Measurements | ||||||||||||
The classification of OG&E's fair value measurements requires judgment regarding the degree to which market data are observable or corroborated by observable market data. GAAP establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to quoted prices in active markets for identical unrestricted assets or liabilities (Level 1) and the lowest priority given to unobservable inputs (Level 3). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The three levels defined in the fair value hierarchy are as follows: | |||||||||||||
Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date. | |||||||||||||
Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. | |||||||||||||
Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). | |||||||||||||
OG&E had no financial instruments measured at fair value on a recurring basis at December 31, 2014 and December 31, 2013. | |||||||||||||
The following table summarizes the fair value and carrying amount of OG&E's financial instruments at December 31, 2014 and December 31, 2013. | |||||||||||||
2014 | 2013 | ||||||||||||
December 31 (In millions) | Carrying Amount | Fair | Carrying Amount | Fair | |||||||||
Value | Value | ||||||||||||
Long-Term Debt | |||||||||||||
Senior Notes | $ | 2,509.70 | $ | 2,957.70 | $ | 2,154.50 | $ | 2,405.00 | |||||
Industrial Authority Bonds | 135.4 | 135.4 | 135.4 | 135.4 | |||||||||
Tinker Debt | 10.2 | 10.3 | 10.3 | 9.1 | |||||||||
StockBased_Compensation
Stock-Based Compensation | 12 Months Ended | |||||||||||||||||
Dec. 31, 2014 | ||||||||||||||||||
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | ||||||||||||||||||
5 | Stock-Based Compensation | |||||||||||||||||
In 2013, OGE Energy adopted, and its shareowners approved, the 2013 Stock Incentive Plan. The 2013 Plan replaced the 2008 Plan and no further awards will be granted under the 2008 Plan. Under the 2013 Stock Incentive Plan, restricted stock, restricted stock units, stock options, stock appreciation rights and performance units may be granted to officers, directors and other key employees of OGE Energy and its subsidiaries. OGE Energy has authorized the issuance of up to 7,400,000 shares under the 2013 Stock Incentive Plan. | ||||||||||||||||||
The following table summarizes OG&E's pre-tax compensation expense and related income tax benefit for the years ended December 31, 2014, 2013 and 2012 related to performance units and restricted stock for OG&E employees. | ||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||
Performance units | ||||||||||||||||||
Total shareholder return | $ | 2 | $ | 1.7 | $ | 1.7 | ||||||||||||
Earnings per share | 0.8 | 0.5 | 0.9 | |||||||||||||||
Total performance units | 2.8 | 2.2 | 2.6 | |||||||||||||||
Restricted stock | 0.1 | 0.1 | 0.1 | |||||||||||||||
Net compensation expense | $ | 2.9 | $ | 2.3 | $ | 2.7 | ||||||||||||
Income tax benefit | $ | 1.1 | $ | 0.9 | $ | 1.2 | ||||||||||||
OGE Energy has issued new shares to satisfy stock option exercises, restricted stock grants and payouts of earned performance units. In 2014, 2013 and 2012, there were 100,640 shares, 139,706 shares and 205,838 shares, respectively, of new common stock issued to OG&E's employees pursuant to OGE Energy's stock incentive plans related to exercised stock options, restricted stock grants (net of forfeitures) and payouts of earned performance units. In 2014, there were 1,076 shares of restricted stock returned to OGE Energy to satisfy tax liabilities. | ||||||||||||||||||
Performance Units | ||||||||||||||||||
Under the Stock Incentive Plan, OGE Energy has issued performance units which represent the value of one share of OGE Energy's common stock. The performance units provide for accelerated vesting if there is a change in control (as defined in the Stock Incentive Plan). Each performance unit is subject to forfeiture if the recipient terminates employment with OGE Energy or a subsidiary prior to the end of the three-year award cycle for any reason other than death, disability or retirement. In the event of death, disability or retirement, a participant will receive a prorated payment based on such participant's number of full months of service during the award cycle, further adjusted based on the achievement of the performance goals during the award cycle. | ||||||||||||||||||
The performance units granted based on total shareholder return are contingently awarded and will be payable in shares of OGE Energy's common stock subject to the condition that the number of performance units, if any, earned by the employees upon the expiration of a three-year award cycle (i.e., three-year cliff vesting period) is dependent on OGE Energy's total shareholder return ranking relative to a peer group of companies. The performance units granted based on earnings per share are contingently awarded and will be payable in shares of OGE Energy's common stock based on OGE Energy's earnings per share growth over a three-year award cycle (i.e., three-year cliff vesting period) compared to a target set at the time of the grant by the Compensation Committee of OGE Energy's Board of Directors. All of these performance units are classified as equity in OGE Energy's Consolidated Balance Sheet. If there is no or only a partial payout for the performance units at the end of the award cycle, the unearned performance units are cancelled. Payout requires approval of the Compensation Committee of OGE Energy's Board of Directors. Payouts, if any, are all made in common stock and are considered made when the payout is approved by the Compensation Committee. | ||||||||||||||||||
Performance Units – Total Shareholder Return | ||||||||||||||||||
The fair value of the performance units based on total shareholder return was estimated on the grant date using a lattice-based valuation model that factors in information, including the expected dividend yield, expected price volatility, risk-free interest rate and the probable outcome of the market condition, over the expected life of the performance units. Compensation expense for the performance units is a fixed amount determined at the grant date fair value and is recognized over the three-year award cycle regardless of whether performance units are awarded at the end of the award cycle. Dividends were not accrued or paid for awards prior to February 2014, and were therefore not included in the fair value calculation. Beginning with the February 2014 performance unit awards, dividends are accrued on a quarterly basis pending achievement of payout criteria, and were therefore included in the fair value calculations. Expected price volatility is based on the historical volatility of OGE Energy's common stock for the past three years and was simulated using the Geometric Brownian Motion process. The risk-free interest rate for the performance unit grants is based on the three-year U.S. Treasury yield curve in effect at the time of the grant. The expected life of the units is based on the non-vested period since inception of the award cycle. There are no post-vesting restrictions related to OGE Energy's performance units based on total shareholder return. The number of performance units granted based on total shareholder return and the assumptions used to calculate the grant date fair value of the performance units based on total shareholder return are shown in the following table. | ||||||||||||||||||
2014 | 2013 | 2012 | ||||||||||||||||
Number of units granted to OG&E employees | 67,773 | 71,850 | 81,122 | |||||||||||||||
Fair value of units granted | $ | 34.73 | $ | 25.89 | $ | 25.91 | ||||||||||||
Expected dividend yield | 2.5 | % | 2.8 | % | 3 | % | ||||||||||||
Expected price volatility | 20 | % | 20 | % | 22 | % | ||||||||||||
Risk-free interest rate | 0.67 | % | 0.37 | % | 0.38 | % | ||||||||||||
Expected life of units (in years) | 2.88 | 2.84 | 2.87 | |||||||||||||||
Performance Units – Earnings Per Share | ||||||||||||||||||
The fair value of the performance units based on earnings per share is based on grant date fair value which is equivalent to the price of one share of OGE Energy's common stock on the date of grant. The fair value of performance units based on earnings per share varies as the number of performance units that will vest is based on the grant date fair value of the units and the probable outcome of the performance condition. OGE Energy reassesses at each reporting date whether achievement of the performance condition is probable and accrues compensation expense if and when achievement of the performance condition is probable. As a result, the compensation expense recognized for these performance units can vary from period to period. There are no post-vesting restrictions related to OGE Energy's performance units based on earnings per share. The number of performance units granted based on earnings per share and the grant date fair value are shown in the following table. | ||||||||||||||||||
2014 | 2013 | 2012 | ||||||||||||||||
Number of units granted to OG&E employees | 22,592 | 23,952 | 27,038 | |||||||||||||||
Fair value of units granted | $ | 34.74 | $ | 26.73 | $ | 23.82 | ||||||||||||
Restricted Stock | ||||||||||||||||||
Under the Stock Incentive Plan and beginning in 2008, OGE Energy issued restricted stock to certain existing non-officer employees as well as other executives upon hire to attract and retain individuals to be competitive in the marketplace. The restricted stock vests in one-third annual increments. Prior to vesting, each share of restricted stock is subject to forfeiture if the recipient ceases to render substantial services to OGE Energy or a subsidiary for any reason other than death, disability or retirement. These shares may not be sold, assigned, transferred or pledged and are subject to a risk of forfeiture. | ||||||||||||||||||
The fair value of the restricted stock was based on the closing market price of OGE Energy's common stock on the grant date. Compensation expense for the restricted stock is a fixed amount determined at the grant date fair value and is recognized as services are rendered by employees over a three-year vesting period. Also, OG&E treats its restricted stock as multiple separate awards by recording compensation expense separately for each tranche whereby a substantial portion of the expense is recognized in the earlier years in the requisite service period. Dividends are accrued and paid during the vesting period on all restricted stock awards prior to July 2014, and therefore included in the fair value calculation. For all awards after July 2014, dividends will only be paid on any restricted stock awards that vest, accordingly dividends are no longer included in the fair value calculations. The expected life of the restricted stock is based on the non-vested period since inception of the three-year award cycle. There are no post-vesting restrictions related to OGE Energy's restricted stock. The number of shares of restricted stock granted related to OG&E employees and the grant date fair value are shown in the following table. | ||||||||||||||||||
2014 | 2013 | 2012 | ||||||||||||||||
Shares of restricted stock granted to OG&E employees | 6,204 | 3,824 | 2,216 | |||||||||||||||
Fair value of restricted stock granted | $ | 35.66 | $ | 29.71 | $ | 26.93 | ||||||||||||
A summary of the activity for OGE Energy's performance units and restricted stock applicable to OG&E's employees at December 31, 2014 and changes in 2014 are shown in the following table. | ||||||||||||||||||
Performance Units | ||||||||||||||||||
Total Shareholder Return | Earnings Per Share | Restricted Stock | ||||||||||||||||
(dollars in millions) | Number | Aggregate Intrinsic Value | Number | Aggregate Intrinsic Value | Number | Aggregate Intrinsic Value | ||||||||||||
of Units | of Units | of Shares | ||||||||||||||||
Units/Shares Outstanding at 12/31/13 | 206,826 | 68,938 | 5,948 | |||||||||||||||
Granted | 67,773 | (A) | 22,592 | (A) | 6,204 | |||||||||||||
Converted | (68,750 | ) | (B) | $ | 3.7 | (22,914 | ) | (B) | $ | 1.6 | N/A | |||||||
Vested | N/A | N/A | (2,954 | ) | $ | 0.1 | ||||||||||||
Forfeited | (1,494 | ) | (496 | ) | — | |||||||||||||
Employee migration | 7,925 | (C) | 2,643 | (C) | — | |||||||||||||
Units/Shares Outstanding at 12/31/14 | 212,280 | $ | — | 70,763 | $ | 1.7 | 9,198 | $ | 0.3 | |||||||||
Units/Shares Fully Vested at 12/31/14 | 73,020 | $ | — | 24,339 | $ | 1 | ||||||||||||
(A) | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target. | |||||||||||||||||
(B) | These amounts represent performance units that vested at December 31, 2013 which were settled in February 2014. | |||||||||||||||||
(C) | Due to certain employees transferring between OG&E and its affiliates. | |||||||||||||||||
A summary of the activity for OGE Energy's non-vested performance units and restricted stock applicable to OG&E's employees at December 31, 2014 and changes in 2014 are shown in the following table. | ||||||||||||||||||
Performance Units | ||||||||||||||||||
Total Shareholder Return | Earnings Per Share | Restricted Stock | ||||||||||||||||
Number | Weighted-Average | Number | Weighted-Average | Number | Weighted-Average | |||||||||||||
of Units | Grant Date | of Units | Grant Date | of Shares | Grant Date | |||||||||||||
Fair Value | Fair Value | Fair Value | ||||||||||||||||
Units/Shares Non-Vested at 12/31/13 | 138,076 | $ | 25.9 | 46,024 | $ | 25.25 | 5,948 | $ | 27.91 | |||||||||
Granted | 67,773 | (A) | $ | 34.73 | 22,592 | (A) | $ | 34.74 | 6,204 | $ | 35.66 | |||||||
Vested | (73,020 | ) | $ | 25.91 | (24,339 | ) | $ | 23.82 | (2,954 | ) | $ | 26.65 | ||||||
Forfeited | (1,494 | ) | $ | 28.01 | (496 | ) | $ | 27.08 | — | $ | — | |||||||
Employee migration | 7,925 | (B) | $ | 27.2 | 2,643 | (B) | $ | 26.5 | — | $ | — | |||||||
Units/Shares Non-Vested at 12/31/14 | 139,260 | $ | 30.24 | 46,424 | $ | 30.67 | 9,198 | $ | 33.57 | |||||||||
Units/Shares Expected to Vest | 123,848 | (C) | 41,287 | (C) | 9,198 | |||||||||||||
(A) | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target. | |||||||||||||||||
(B) | Due to certain employees transferring between OG&E and its affiliates. | |||||||||||||||||
(C) | The intrinsic value of the performance units based on total shareholder return and earnings per share is $0.0 million and $1.5 million, respectively. | |||||||||||||||||
Fair Value of Vested Performance Units and Restricted Stock | ||||||||||||||||||
A summary of OG&E's fair value for its vested performance units and restricted stock is shown in the following table. | ||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||
Performance units | ||||||||||||||||||
Total shareholder return | $ | 1.9 | $ | 1.6 | $ | 1.4 | ||||||||||||
Earnings per share | 0.7 | 1 | 0.8 | |||||||||||||||
Restricted stock | 0.1 | 0.1 | 0.1 | |||||||||||||||
Unrecognized Compensation Cost | ||||||||||||||||||
A summary of OG&E's unrecognized compensation cost for its non-vested performance units and restricted stock and the weighted-average periods over which the compensation cost is expected to be recognized are shown in the following table. | ||||||||||||||||||
December 31, 2014 | Unrecognized Compensation Cost (in millions) | Weighted Average to be Recognized (in years) | ||||||||||||||||
Performance units | ||||||||||||||||||
Total shareholder return | $ | 2.3 | 1.7 | |||||||||||||||
Earnings per share | 0.7 | 1.83 | ||||||||||||||||
Total performance units | 3 | |||||||||||||||||
Restricted stock | 0.2 | 2.54 | ||||||||||||||||
Total | $ | 3.2 | ||||||||||||||||
Stock Options | ||||||||||||||||||
OGE Energy last issued stock options in 2004 and as of December 31, 2006, all stock options were fully vested and expensed. All stock options had a contractual life of 10 years. | ||||||||||||||||||
A summary of the activity for OG&E's exercised stock options in 2013 and 2012 are shown in the following table. | ||||||||||||||||||
Year ended December 31 (In millions) | 2013 | 2012 | ||||||||||||||||
Intrinsic value (A) | $ | 0.2 | $ | 0.2 | ||||||||||||||
(A) | The difference between the market value on the date of exercise and the option exercise price. |
Supplemental_Cash_Flow_Informa
Supplemental Cash Flow Information | 12 Months Ended | |||||||||
Dec. 31, 2014 | ||||||||||
Supplemental Cash Flow Information [Abstract] | ||||||||||
Cash Flow, Supplemental Disclosures [Text Block] | Supplemental Cash Flow Information | |||||||||
The following table discloses information about investing and financing activities that affected recognized assets and liabilities but which did not result in cash receipts or payments. Also disclosed in the table is cash paid for interest, net of interest capitalized, and cash paid for income taxes, net of income tax refunds. | ||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||
NON-CASH INVESTING AND FINANCING ACTIVITIES | ||||||||||
Installment payments for Tinker electric distribution system | $ | — | $ | — | $ | 10.6 | ||||
Power plant long-term service agreement | — | 9.7 | — | |||||||
SUPPLEMENTAL CASH FLOW INFORMATION | ||||||||||
Cash Paid During the Period for | ||||||||||
Interest (net of interest capitalized) (A) | $ | 143.6 | $ | 127.5 | $ | 122.1 | ||||
Income taxes (net of income tax refunds) | 0.2 | (5.5 | ) | (1.2 | ) | |||||
(A) | Net of interest capitalized of $2.4 million, $3.4 million and $3.5 million in 2014, 2013 and 2012, respectively. |
Income_Taxes
Income Taxes | 12 Months Ended | |||||||||
Dec. 31, 2014 | ||||||||||
Income Tax Disclosure [Abstract] | ||||||||||
Income Tax Disclosure Text Block | Income Taxes | |||||||||
The items comprising income tax expense are as follows: | ||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||
Provision (Benefit) for Current Income Taxes | ||||||||||
Federal | $ | (43.4 | ) | $ | (3.2 | ) | $ | (9.0 | ) | |
State | (6.3 | ) | 0.6 | 0.3 | ||||||
Total Provision (Benefit) for Current Income Taxes | (49.7 | ) | (2.6 | ) | (8.7 | ) | ||||
Provision for Deferred Income Taxes, net | ||||||||||
Federal | 146.8 | 106.4 | 111.4 | |||||||
State | 15.4 | 11.7 | (5.9 | ) | ||||||
Total Provision for Deferred Income Taxes, net | 162.2 | 118.1 | 105.5 | |||||||
Deferred Federal Investment Tax Credits, net | (0.9 | ) | (2.0 | ) | (2.2 | ) | ||||
Total Income Tax Expense | $ | 111.6 | $ | 113.5 | $ | 94.6 | ||||
OG&E is a member of an affiliated group that files consolidated income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. With few exceptions, OG&E is no longer subject to U.S. Federal tax examinations by tax authorities for years prior to 2011 or state and local tax examinations by tax authorities for years prior to 2010. Income taxes are generally allocated to each company in the affiliated group based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and are being amortized to income over the life of the related property. OG&E earns both Federal and Oklahoma state tax credits associated with production from its wind farms and earns Oklahoma state tax credits associated with its investments in electric generating facilities which further reduce OG&E's effective tax rate. | ||||||||||
The following schedule reconciles the statutory tax rates to the effective income tax rate: | ||||||||||
Year ended December 31 | 2014 | 2013 | 2012 | |||||||
Statutory Federal tax rate | 35 | % | 35 | % | 35 | % | ||||
Amortization of net unfunded deferred taxes | 0.8 | 0.8 | 1 | |||||||
Federal investment tax credits, net | (0.2 | ) | (0.5 | ) | (0.6 | ) | ||||
State income taxes, net of Federal income tax benefit | 0.8 | — | (0.7 | ) | ||||||
Federal renewable energy credit (A) | (9.4 | ) | (9.2 | ) | (9.4 | ) | ||||
Uncertain tax positions | 0.7 | 2 | — | |||||||
Other | — | (0.2 | ) | (0.1 | ) | |||||
Effective income tax rate | 27.7 | % | 27.9 | % | 25.2 | % | ||||
(A) | Represents credits associated with the production from OG&E's wind farms. | |||||||||
The deferred tax provisions are recognized as costs in the ratemaking process by the commissions having jurisdiction over the rates charged by OG&E. The components of Deferred Income Taxes at December 31, 2014 and 2013, respectively, were as follows: | ||||||||||
December 31 (In millions) | 2014 | 2013 | ||||||||
Current Deferred Income Tax Assets | ||||||||||
Net operating losses | $ | 153.2 | $ | 168.7 | ||||||
Accrued liabilities | 6 | 9 | ||||||||
Federal tax credits | 8.3 | 8 | ||||||||
Accrued vacation | 2.7 | 2.8 | ||||||||
Uncollectible accounts | 0.6 | 0.7 | ||||||||
Total Current Deferred Income Tax Assets | $ | 170.8 | $ | 189.2 | ||||||
Non-Current Deferred Income Tax Liabilities | ||||||||||
Accelerated depreciation and other property related differences | $ | 1,931.40 | $ | 1,747.00 | ||||||
OG&E pension plan | 77.2 | 84.7 | ||||||||
Regulatory asset | 24.7 | 26 | ||||||||
Income taxes refundable to customers, net | 21.7 | 21.9 | ||||||||
Bond redemption-unamortized costs | 5.3 | 3.6 | ||||||||
Total Non-Current Deferred Income Tax Liabilities | 2,060.30 | 1,883.20 | ||||||||
Non-Current Deferred Income Tax Assets | ||||||||||
Federal tax credits | (137.4 | ) | (101.9 | ) | ||||||
State tax credits | (91.6 | ) | (86.1 | ) | ||||||
Regulatory liabilities | (58.0 | ) | (61.3 | ) | ||||||
Postretirement medical and life insurance benefits | (40.6 | ) | (45.2 | ) | ||||||
Asset retirement obligations | (21.4 | ) | (20.8 | ) | ||||||
Net operating losses | (19.7 | ) | (17.6 | ) | ||||||
Deferred Federal investment tax credits | (0.4 | ) | (0.7 | ) | ||||||
Other | (4.6 | ) | (4.4 | ) | ||||||
Total Non-Current Deferred Income Tax Assets | (373.7 | ) | (338.0 | ) | ||||||
Non-Current Deferred Income Tax Liabilities, net | $ | 1,686.60 | $ | 1,545.20 | ||||||
As of December 31, 2014, OG&E has classified $10.5 million of unrecognized tax benefits as a reduction of deferred tax assets recorded. Management is currently unaware of any issues under review that could result in significant additional payments, accruals, or other material deviation from this amount. | ||||||||||
Following is a reconciliation of the OG&E’s total gross unrecognized tax benefits as of the years ended December 31, 2014, 2013, and 2012. | ||||||||||
(Millions) | 2014 | 2013 | 2012 | |||||||
Balance at January 1 | $ | 7.8 | $ | — | $ | — | ||||
Tax positions related to current year: | ||||||||||
Additions | 2.7 | 2.7 | — | |||||||
Tax positions related to prior years: | ||||||||||
Additions | — | 5.1 | — | |||||||
Balance at December 31 | $ | 10.5 | $ | 7.8 | $ | — | ||||
Where applicable, OG&E classifies income tax-related interest and penalties as interest expense and other operation and maintenance expense, respectively. During the year ended December 31, 2014, there were no income tax-related interest or penalties recorded with regard to uncertain tax positions. The total amount of unrecognized tax benefits that would impact the effective tax rate, if recognized, was $10.5 million as of December 31, 2014. | ||||||||||
As previously reported, in January 2013, OG&E determined that a portion of certain Oklahoma investment tax credits previously recognized but not yet utilized may not be available for utilization in future years. During 2014, OG&E recorded an additional reserve for this item of $4.2 million ($2.7 million after the federal tax benefit) related to the same Oklahoma investment tax credits generated in the current year but not yet utilized due to management's determination that it is more likely than not that it will be unable to utilize these credits. | ||||||||||
Other | ||||||||||
OG&E sustained Federal and state tax operating losses through 2013 caused primarily by bonus depreciation and other book verses tax temporary differences. As a result, OG&E had accrued Federal and state income tax benefits carrying into 2014. As OG&E can no longer carry these losses back to prior periods, these losses are being carried forward for utilization in future years. In addition to the operating losses, OG&E was unable to utilize the various tax credits that were generating during these years. These tax losses and credits are being carried as deferred tax assets and will be utilized in future periods. Under current law, OG&E anticipates future taxable income will be sufficient to utilize all of the losses and credits before they begin to expire, accordingly no valuation allowance is considered necessary. The following table summarizes these carry forwards: | ||||||||||
(In millions) | Carry Forward Amount | Deferred Tax Asset | Earliest Expiration Date | |||||||
Net operating losses | ||||||||||
State operating loss | $ | 729 | $ | 26.9 | 2030 | |||||
Federal operating loss | 417.4 | 146 | 2030 | |||||||
Federal tax credits | 145.7 | 145.7 | 2029 | |||||||
State tax credits | ||||||||||
Oklahoma investment tax credits | 104.7 | 68.1 | N/A | |||||||
Oklahoma capital investment board credits | 7.3 | 7.3 | N/A | |||||||
Oklahoma zero emission tax credits | 24.1 | 16.2 | 2020 | |||||||
OG&E projects full utilization of all Federal operating losses in 2015 as well as partial utilization of State operating loss carryforwards. Accordingly, a current deferred tax asset of $153.2 million has been reflected on the balance sheet. | ||||||||||
Prior to 2014, OG&E had a Federal tax operating loss primarily caused by the accelerated tax "bonus" depreciation provision contained within the Tax Relief, Unemployment Insurance Reauthorization and Job Creation Act of 2010 which allowed OG&E to record a current income tax deduction for 100 percent of the cost of certain property placed into service in 2011 and 50 percent for certain property placed into service in 2012. During 2013, OG&E began to utilize these net operating losses. | ||||||||||
On December 19, 2014, the Tax Increase Prevention Act of 2014 was signed into law. Among other things, the law included an extension of bonus depreciation for one year for property generally placed in service before January 1, 2015. The impact of the new law was reflected in OG&E's 2014 Financial Statements as an increase in Deferred Tax Liabilities with a corresponding increase in Deferred Tax Assets related to the net operating loss. With this extension of bonus depreciation OG&E's utilization of net operating losses will continue into 2015. |
Common_Stock_and_Cumulative_Pr
Common Stock and Cumulative Preferred Stock | 12 Months Ended |
Dec. 31, 2014 | |
Common Stock and Cumulative Preferred Stock [Abstract] | |
Common Stock and Cumulative Preferred Stock [Text Block] | Common Stock and Cumulative Preferred Stock |
There were no new shares of common stock issued in 2014, 2013 or 2012. |
LongTerm_Debt
Long-Term Debt | 12 Months Ended | ||||||
Dec. 31, 2014 | |||||||
Long-term Debt, Unclassified [Abstract] | |||||||
Long-Term Debt | Long-Term Debt | ||||||
A summary of OG&E's long-term debt is included in the Statements of Capitalization. At December 31, 2014, OG&E was in compliance with all of its debt agreements. | |||||||
Industrial Authority Bonds | |||||||
OG&E has tax-exempt pollution control bonds with optional redemption provisions that allow the holders to request repayment of the bonds on any business day. The bonds, which can be tendered at the option of the holder during the next 12 months, are as follows: | |||||||
SERIES | DATE DUE | AMOUNT | |||||
(In millions) | |||||||
0.07% | - | 0.20% | Garfield Industrial Authority, January 1, 2025 | $ | 47 | ||
0.07% | - | 0.18% | Muskogee Industrial Authority, January 1, 2025 | 32.4 | |||
0.04% | - | 0.15% | Muskogee Industrial Authority, June 1, 2027 | 56 | |||
Total (redeemable during next 12 months) | $ | 135.4 | |||||
All of these bonds are subject to an optional tender at the request of the holders, at 100 percent of the principal amount, together with accrued and unpaid interest to the date of purchase. The bond holders, on any business day, can request repayment of the bond by delivering an irrevocable notice to the tender agent stating the principal amount of the bond, payment instructions for the purchase price and the business day the bond is to be purchased. The repayment option may only be exercised by the holder of a bond for the principal amount. When a tender notice has been received by the trustee, a third party remarketing agent for the bonds will attempt to remarket any bonds tendered for purchase. This process occurs once per week. Since the original issuance of these series of bonds in 1995 and 1997, the remarketing agent has successfully remarketed all tendered bonds. If the remarketing agent is unable to remarket any such bonds, OG&E is obligated to repurchase such unremarketed bonds. As OG&E has both the intent and ability to refinance the bonds on a long-term basis and such ability is supported by an ability to consummate the refinancing, the bonds are classified as long-term debt in OG&E's Financial Statements. OG&E believes that it has sufficient liquidity to meet these obligations. | |||||||
Issuance of Long-Term Debt | |||||||
On March 25, 2014, OG&E completed the issuance of $250 million of 4.55 percent senior notes due March 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes. | |||||||
On December 11, 2014, OG&E completed the issuance of $250 million of 4.00 percent Senior Notes, Series due December 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay short-term debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes. | |||||||
Redemption of Long-Term Debt | |||||||
On August 1, 2014, OG&E redeemed all $140 million principal amount outstanding of its 6.50 percent senior notes due August 1, 2034 at 103.25 percent of their principal amount, plus accrued interest. The redemption premium of $4.6 million was deferred and will be amortized through March 2044 to match the expected regulatory treatment. | |||||||
Long-Term Debt Maturities | |||||||
Maturities of OG&E's long-term debt during the next five years consist of $0.2 million, $110.2 million, $125.1 million, $250.1 million and $250.1 million in years 2015, 2016, 2017, 2018 and 2019, respectively. | |||||||
OG&E has previously incurred costs related to debt refinancings. Unamortized loss on reacquired debt is classified as a Non-Current Regulatory Asset, unamortized debt expense is classified as Deferred Charges and Other Assets and the unamortized premium and discount on long-term debt is classified as Long-Term Debt, respectively, in the Balance Sheets and are being amortized over the life of the respective debt. |
ShortTerm_Debt_and_Credit_Faci
Short-Term Debt and Credit Facility | 12 Months Ended |
Dec. 31, 2014 | |
Short-term Debt [Abstract] | |
Short-Term Debt and Credit Facility | Short-Term Debt and Credit Facility |
At December 31, 2014, there were $215.6 million in advances to OGE Energy as compared to $87.2 million in outstanding advances from OGE Energy in 2013. OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $400 million of OGE Energy's revolving credit amount. Effective July 29, 2013, OG&E extended the termination date of this agreement to December 13, 2017. At December 31, 2014, there were no intercompany borrowings under this agreement. OG&E has a $400 million unsecured five-year revolving credit facility which is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility. At December 31, 2014, there was $2.0 million supporting letters of credit at a weighted-average interest rate of 0.95 percent. There were no outstanding borrowings under this revolving credit agreement and no outstanding commercial paper borrowings at December 31, 2014. | |
In December 2011, OG&E entered into an unsecured five-year revolving credit agreement for $400.0 million. This credit facility contained an option, which could be exercised up to two times, to extend the term for an additional year. In the third quarter of 2013, OG&E utilized one of these one-year extensions, and received consent from all of the lenders, to extend the maturity of its credit agreement from December 13, 2016 to December 13, 2017. In the second quarter of 2014, OG&E utilized its second extension to extend the maturity of its credit facility from December 13, 2017 to December 13, 2018. As of December 31, 2014, the commitment of a single existing lender with respect to approximately $8.7 million of OG&E's credit facility, however, was not extended and, unless the non-extending lender is replaced in accordance with the terms of the credit facility, the commitment will expire December 13, 2017. | |
OGE Energy's and OG&E's ability to access the commercial paper market could be adversely impacted by a credit ratings downgrade or major market disruptions. Pricing grids associated with OGE Energy's and OG&E's credit facilities could cause annual fees and borrowing rates to increase if an adverse rating impact occurs. The impact of any future downgrade could include an increase in the costs of OGE Energy's and OG&E's short-term borrowings, but a reduction in OGE Energy's and OG&E's credit ratings would not result in any defaults or accelerations. Any future downgrade of OGE Energy or OG&E could also lead to higher long-term borrowing costs and, if below investment grade, would require OG&E to post collateral or letters of credit. | |
OG&E must obtain regulatory approval from the FERC in order to borrow on a short-term basis. OG&E has the necessary regulatory approvals to incur up to $800 million in short-term borrowings at any one time for a two-year period beginning January 1, 2015 and ending December 31, 2016. |
Retirement_Plans_and_Postretir
Retirement Plans and Postretirement Benefit Plans | 12 Months Ended | |||||||||||||||||||||||||||
Dec. 31, 2014 | ||||||||||||||||||||||||||||
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | ||||||||||||||||||||||||||||
Pension and Other Postretirement Benefits Disclosure [Text Block] | Retirement Plans and Postretirement Benefit Plans | |||||||||||||||||||||||||||
Pension Plan and Restoration of Retirement Income Plan | ||||||||||||||||||||||||||||
OG&E's employees participate in OGE Energy's Pension Plan and Restoration of Retirement Income Plan. | ||||||||||||||||||||||||||||
It is OGE Energy's policy to fund the Pension Plan on a current basis based on the net periodic pension expense as determined by OGE Energy's actuarial consultants. During 2013, OGE Energy made contributions to its Pension Plan of $35 million of which none was OG&E's portion. to help ensure that the Pension Plan maintains an adequate funded status. Such contributions are intended to provide not only for benefits attributed to service to date, but also for those expected to be earned in the future. During 2014, OGE Energy did not make any contributions to its Pension Plan. OGE Energy has not yet determined whether it will need to make any contributions to the Pension Plan in 2015. Any contribution to the Pension Plan during 2015 would be a discretionary contribution, anticipated to be in the form of cash, and is not required to satisfy the minimum regulatory funding requirement specified by the Employee Retirement Income Security Act of 1974, as amended. OGE Energy could be required to make additional contributions if the value of its pension trust and postretirement benefit plan trust assets are adversely impacted by a major market disruption in the future. | ||||||||||||||||||||||||||||
In accordance with ASC Topic 715, "Compensation - Retirement Benefits," a one-time settlement charge is required to be recorded by an organization when lump sum payments or other settlements that relieve the organization from the responsibility for the pension benefit obligation during a plan year exceed the service cost and interest cost components of the organization’s net periodic pension cost. During 2013, OG&E experienced an increase in both the number of employees electing to retire and the amount of lump sum payments to be paid to such employees upon retirement. As a result, and based in part on OG&E's historical experience regarding eligible employees who elect to retire in the last quarter of a particular year, OG&E recorded pension settlement charges of $17.6 million in the fourth quarter of 2013, of which $17.0 million related to OG&E’s Oklahoma jurisdiction and has been included in the pension tracker. The pension settlement charge did not require a cash outlay by OG&E and did not increase OG&E’s total pension expense over time, as the charges were an acceleration of costs that otherwise would be recognized as pension expense in future periods. | ||||||||||||||||||||||||||||
OGE Energy provides a Restoration of Retirement Income Plan to those participants in OGE Energy's Pension Plan whose benefits are subject to certain limitations of the Code. Participants in the Restoration of Retirement Income Plan receive the same benefits that they would have received under OGE Energy's Pension Plan in the absence of limitations imposed by the Federal tax laws. The Restoration of Retirement Income Plan is intended to be an unfunded plan. | ||||||||||||||||||||||||||||
Obligations and Funded Status | ||||||||||||||||||||||||||||
The following table presents the status of OG&E's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans for 2014 and 2013. These amounts have been recorded in Accrued Benefit Obligations with the offset recorded as a regulatory asset in OG&E's Balance Sheet as discussed in Note 1. The regulatory asset represents a net periodic benefit cost to be recognized in the Statements of Income in future periods. OG&E's portion of the benefit obligation for OGE Energy's Pension Plan and the Restoration of Retirement Income Plan represents the projected benefit obligation, while the benefit obligation for the postretirement benefit plans represents the accumulated postretirement benefit obligation. The accumulated postretirement benefit obligation for OG&E's Pension Plan and Restoration of Retirement Income Plan differs from the projected benefit obligation in that the former includes no assumption about future compensation levels. The accumulated postretirement benefit obligation for the Pension Plan and the Restoration of Retirement Income Plan at December 31, 2014 was $522.1 million and $2.6 million, respectively. The accumulated postretirement benefit obligation for the Pension Plan and the Restoration of Retirement Income Plan at December 31, 2013 was $483.0 million and $1.9 million, respectively. The details of the funded status of the Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans and the amounts included in the Balance Sheets are as follows: | ||||||||||||||||||||||||||||
Pension Plan | Restoration of Retirement | Postretirement | ||||||||||||||||||||||||||
Income Plan | Benefit Plans | |||||||||||||||||||||||||||
December 31 (In millions) | 2014 | 2013 | 2014 | 2013 | 2014 | 2013 | ||||||||||||||||||||||
Change in Benefit Obligation | ||||||||||||||||||||||||||||
Beginning obligations | $ | 503.6 | $ | 574.6 | $ | 2.1 | $ | 2.2 | $ | 202.4 | $ | 236.4 | ||||||||||||||||
Service cost | 9.1 | 11.6 | — | 0.1 | 2 | 2.9 | ||||||||||||||||||||||
Interest cost | 21.4 | 20.4 | 0.1 | 0.1 | 8.8 | 8.1 | ||||||||||||||||||||||
Participants' contributions | — | (49.9 | ) | — | — | 2.7 | 2.5 | |||||||||||||||||||||
Actuarial (gains) losses | 56.3 | (39.8 | ) | 0.6 | (0.2 | ) | 14 | (35.4 | ) | |||||||||||||||||||
Benefits paid | (46.9 | ) | (13.3 | ) | — | (0.1 | ) | (12.3 | ) | (12.1 | ) | |||||||||||||||||
Ending obligations | $ | 543.5 | $ | 503.6 | $ | 2.8 | $ | 2.1 | $ | 217.6 | $ | 202.4 | ||||||||||||||||
Change in Plans' Assets | ||||||||||||||||||||||||||||
Beginning fair value | $ | 516.5 | $ | 519 | $ | — | $ | — | $ | 56.7 | $ | 55.5 | ||||||||||||||||
Actual return on plans' assets | 62.9 | 60.7 | — | — | 1.7 | 3.4 | ||||||||||||||||||||||
Employer contributions | — | — | — | 0.1 | 5.4 | 7.4 | ||||||||||||||||||||||
Participants' contributions | — | (49.9 | ) | — | — | 2.7 | 2.5 | |||||||||||||||||||||
Benefits paid | (46.9 | ) | (13.3 | ) | — | (0.1 | ) | (12.3 | ) | (12.1 | ) | |||||||||||||||||
Ending fair value | $ | 532.5 | $ | 516.5 | $ | — | $ | — | $ | 54.2 | $ | 56.7 | ||||||||||||||||
Funded status at end of year | $ | (11.0 | ) | $ | 12.9 | $ | (2.8 | ) | $ | (2.1 | ) | $ | (163.4 | ) | $ | (145.7 | ) | |||||||||||
Net Periodic Benefit Cost | ||||||||||||||||||||||||||||
Pension Plan | Restoration of Retirement | Postretirement Benefit Plans | ||||||||||||||||||||||||||
Income Plan | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | |||||||||||||||||||
Service cost | $ | 9.1 | $ | 11.6 | $ | 10.9 | $ | — | $ | 0.1 | $ | 0.1 | $ | 2 | $ | 2.9 | $ | 2.7 | ||||||||||
Interest cost | 21.4 | 20.4 | 23.5 | 0.1 | 0.1 | 0.1 | 8.8 | 8.1 | 9.4 | |||||||||||||||||||
Expected return on plan assets | (35.8 | ) | (38.9 | ) | (38.2 | ) | — | — | — | (2.2 | ) | (2.4 | ) | (2.8 | ) | |||||||||||||
Amortization of transition obligation | — | — | — | — | — | — | — | — | 2.5 | |||||||||||||||||||
Amortization of net loss | 11.4 | 20.7 | 19.3 | 0.1 | — | 0.1 | 11 | 18.2 | 17.4 | |||||||||||||||||||
Amortization of unrecognized prior service cost (A) | 1.9 | 1.9 | 2.2 | 0.1 | 0.1 | 0.2 | (13.7 | ) | (13.7 | ) | (13.6 | ) | ||||||||||||||||
Settlement | — | 17.6 | — | — | — | 0.3 | — | — | — | |||||||||||||||||||
Net periodic benefit cost (B) | $ | 8 | $ | 33.3 | $ | 17.7 | $ | 0.3 | $ | 0.3 | $ | 0.8 | $ | 5.9 | $ | 13.1 | $ | 15.6 | ||||||||||
(A) | Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. | |||||||||||||||||||||||||||
(B) | In addition to the $14.2 million, $46.7 million and $34.1 million of net periodic benefit cost recognized in 2014, 2013 and 2012, respectively, OG&E recognized the following: | |||||||||||||||||||||||||||
• | an increase in pension expense in 2014, 2013 and 2012 of $11.2 million, $5.8 million and $8.3 million, respectively, to maintain the allowable amount to be recovered for pension expense in the Oklahoma jurisdiction, which are included in the Pension tracker regulatory asset or liability (see Note 1); | |||||||||||||||||||||||||||
• | an increase in postretirement medical expense in 2014, 2013 and 2012 of $5.2 million, $0.6 million and $0.8 million, respectively, to maintain the allowable amount to be recovered for postretirement medical expense in the Oklahoma jurisdiction which are included in the Pension tracker regulatory asset or liability (see Note 1); and | |||||||||||||||||||||||||||
• | a deferral of pension expense in 2013 of $17.0 million which includes a portion of OGE Energy's pension settlement charge, related to the pension settlement charge of $17.6 million which is included in the Pension tracker regulatory account (see Note 1). | |||||||||||||||||||||||||||
(In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||||||||
Capitalized portion of net periodic pension cost | $ | 2.6 | $ | 5 | $ | 6.1 | ||||||||||||||||||||||
Capitalized portion of net periodic postretirement benefit cost | 1.8 | 4 | 5.1 | |||||||||||||||||||||||||
Rate Assumptions | ||||||||||||||||||||||||||||
Pension Plan and | Postretirement | |||||||||||||||||||||||||||
Restoration of Retirement Income Plan | Benefit Plans | |||||||||||||||||||||||||||
Year ended December 31 | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | ||||||||||||||||||||||
Discount rate | 3.8 | % | 4.6 | % | 3.7 | % | 3.8 | % | 4.6 | % | 3.6 | % | ||||||||||||||||
Rate of return on plans' assets | 7.5 | % | 8 | % | 8 | % | 4 | % | 4 | % | 4 | % | ||||||||||||||||
Compensation increases | 4.2 | % | 4.2 | % | 4.2 | % | N/A | N/A | N/A | |||||||||||||||||||
Assumed health care cost trend: | ||||||||||||||||||||||||||||
Initial trend | N/A | N/A | N/A | 7.85 | % | 8.35 | % | 8.55 | % | |||||||||||||||||||
Ultimate trend rate | N/A | N/A | N/A | 4.48 | % | 4.48 | % | 4.48 | % | |||||||||||||||||||
Ultimate trend year | N/A | N/A | N/A | 2028 | 2028 | 2028 | ||||||||||||||||||||||
N/A - not applicable | ||||||||||||||||||||||||||||
The overall expected rate of return on plan assets assumption was 7.50 percent and 8.00 percent in 2014 and 2013 , respectively, in determining net periodic benefit cost due to recent returns on OGE Energy's long-term investment portfolio. The rate of return on plan assets assumption is the average long-term rate of earnings expected on the funds currently invested and to be invested for the purpose of providing benefits specified by the Pension Plan or postretirement benefit plans. This assumption is reexamined at least annually and updated as necessary. The rate of return on plan assets assumption reflects a combination of historical return analysis, forward-looking return expectations and the plans' current and expected asset allocation. | ||||||||||||||||||||||||||||
The assumed health care cost trend rates have a significant effect on the amounts reported for postretirement medical benefit plans. Future health care cost trend rates are assumed to be 7.85 percent in 2015 with the rates trending downward to 4.48 percent by 2028. A one-percentage point change in the assumed health care cost trend rate would have the following effects: | ||||||||||||||||||||||||||||
ONE-PERCENTAGE POINT INCREASE | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||||||||
Effect on aggregate of the service and interest cost components | $ | — | $ | — | $ | — | ||||||||||||||||||||||
Effect on accumulated postretirement benefit obligations | 0.1 | 0.1 | 0.1 | |||||||||||||||||||||||||
ONE-PERCENTAGE POINT DECREASE | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||||||||
Effect on aggregate of the service and interest cost components | $ | — | $ | — | $ | 0.1 | ||||||||||||||||||||||
Effect on accumulated postretirement benefit obligations | 0.5 | 0.4 | 0.7 | |||||||||||||||||||||||||
Plan Investments, Policies and Strategies | ||||||||||||||||||||||||||||
The Pension Plan assets are held in a trust which follows an investment policy and strategy designed to reduce the funded status volatility of the Plan by utilizing liability driven investing. The purpose of liability driven investing is to structure the asset portfolio to more closely resemble the pension liability and thereby more effectively hedge against changes in the liability. The investment policy follows a glide path approach that shifts a higher portfolio weighting to fixed income as the Plan's funded status increases. The table below sets forth the targeted fixed income and equity allocations at different funded status levels. | ||||||||||||||||||||||||||||
Projected Benefit Obligation Funded Status Thresholds | <90% | 95% | 100% | 105% | 110% | 115% | 120% | |||||||||||||||||||||
Fixed income | 50% | 58% | 65% | 73% | 80% | 85% | 90% | |||||||||||||||||||||
Equity | 50% | 42% | 35% | 27% | 20% | 15% | 10% | |||||||||||||||||||||
Total | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |||||||||||||||||||||
Within the portfolio's overall allocation to equities, the funds are allocated according to the guidelines in the table below. | ||||||||||||||||||||||||||||
Asset Class | Target Allocation | Minimum | Maximum | |||||||||||||||||||||||||
Domestic All-Cap/Large Cap Equity | 50% | 50% | 60% | |||||||||||||||||||||||||
Domestic Mid-Cap Equity | 15% | 5% | 25% | |||||||||||||||||||||||||
Domestic Small-Cap Equity | 15% | 5% | 25% | |||||||||||||||||||||||||
International Equity | 20% | 10% | 30% | |||||||||||||||||||||||||
OGE Energy has retained an investment consultant responsible for the general investment oversight, analysis, monitoring investment guideline compliance and providing quarterly reports to certain of OG&E's members and OGE Energy's Investment Committee. The various investment managers used by the trust operate within the general operating objectives as established in the investment policy and within the specific guidelines established for each investment manager's respective portfolio. | ||||||||||||||||||||||||||||
The portfolio is rebalanced at least on an annual basis to bring the asset allocations of various managers in line with the target asset allocation listed above. More frequent rebalancing may occur if there are dramatic price movements in the financial markets which may cause the trust's exposure to any asset class to exceed or fall below the established allowable guidelines. | ||||||||||||||||||||||||||||
To evaluate the progress of the portfolio, investment performance is reviewed quarterly. It is, however, expected that performance goals will be met over a full market cycle, normally defined as a three to five year period. Analysis of performance is within the context of the prevailing investment environment and the advisors' investment style. The goal of the trust is to provide a rate of return consistently from three percent to five percent over the rate of inflation (as measured by the national Consumer Price Index) on a fee adjusted basis over a typical market cycle of no less than three years and no more than five years. Each investment manager is expected to outperform its respective benchmark. Below is a list of each asset class utilized with appropriate comparative benchmark(s) each manager is evaluated against: | ||||||||||||||||||||||||||||
Asset Class | Comparative Benchmark(s) | |||||||||||||||||||||||||||
Core Fixed Income | Barclays Capital Aggregate Index | |||||||||||||||||||||||||||
Interest Rate Sensitive Fixed Income | Barclays Capital Aggregate Index | |||||||||||||||||||||||||||
Long Duration Fixed Income | Barclays Long Government/Credit | |||||||||||||||||||||||||||
Equity Index | Standard & Poor's 500 Index | |||||||||||||||||||||||||||
All-Cap Equity | Russell 3000 Index | |||||||||||||||||||||||||||
Russell 3000 Value Index | ||||||||||||||||||||||||||||
Mid-Cap Equity | Russell Midcap Index | |||||||||||||||||||||||||||
Russell Midcap Value Index | ||||||||||||||||||||||||||||
Small-Cap Equity | Russell 2000 Index | |||||||||||||||||||||||||||
Russell 2000 Value Index | ||||||||||||||||||||||||||||
International Equity | Morgan Stanley Capital Investment ACWI ex-US | |||||||||||||||||||||||||||
The fixed income managers are expected to use discretion over the asset mix of the trust assets in its efforts to maximize risk-adjusted performance. Exposure to any single issuer, other than the U.S. government, its agencies, or its instrumentalities (which have no limits) is limited to five percent of the fixed income portfolio as measured by market value. At least 75 percent of the invested assets must possess an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings. The portfolio may invest up to 10 percent of the portfolio's market value in convertible bonds as long as the securities purchased meet the quality guidelines. A portfolio may invest up to 25 percent of the portfolio's market value in private placement, including 144A securities with or without registration rights and allow for futures to be traded in the portfolio. The purchase of any of OGE Energy's equity, debt or other securities is prohibited. | ||||||||||||||||||||||||||||
The domestic value equity managers focus on stocks that the manager believes are undervalued in price and earn an average or less than average return on assets, and often pays out higher than average dividend payments. The domestic growth equity manager will invest primarily in growth companies which consistently experience above average growth in earnings and sales, earn a high return on assets, and reinvest cash flow into existing business. The domestic mid-cap equity portfolio manager focuses on companies with market capitalizations lower than the average company traded on the public exchanges with the following characteristics: price/earnings ratio at or near the Russell Midcap Index, small dividend yield, return on equity at or near the Russell Midcap Index and an earnings per share growth rate at or near the Russell Midcap Index. The domestic small-cap equity manager will purchase shares of companies with market capitalizations lower than the average company traded on the public exchanges with the following characteristics: price/earnings ratio at or near the Russell 2000, small dividend yield, return on equity at or near the Russell 2000 and an earnings per share growth rate at or near the Russell 2000. The international global equity manager invests primarily in non-dollar denominated equity securities. Investing internationally diversifies the overall trust across the global equity markets. The manager is required to operate under certain restrictions including: regional constraints, diversification requirements and percentage of U.S. securities. The Morgan Stanley Capital International All Country World ex-US Index is the benchmark for comparative performance purposes. The Morgan Stanley Capital International All Country World ex-US Index is a market value weighted index designed to measure the combined equity market performance of developed and emerging markets countries, excluding the United States. All of the equities which are purchased for the international portfolio are thoroughly researched. Only companies with a market capitalization in excess of $100 million are allowable. No more than five percent of the portfolio can be invested in any one stock at the time of purchase. All securities are freely traded on a recognized stock exchange and there are no over-the-counter derivatives. The following investment categories are excluded: options (other than traded currency options), commodities, futures (other than currency futures or currency hedging), short sales/margin purchases, private placements, unlisted securities and real estate (but not real estate shares). | ||||||||||||||||||||||||||||
For all domestic equity investment managers, no more than eight percent (five percent for mid-cap and small-cap equity managers) can be invested in any one stock at the time of purchase and no more than 16 percent (10 percent for mid-cap and small-cap equity managers) after accounting for price appreciation. Options or financial futures may not be purchased unless prior approval of OGE Energy's Investment Committee is received. The purchase of securities on margin is prohibited as is securities lending. Private placement or venture capital may not be purchased. All interest and dividend payments must be swept on a daily basis into a short-term money market fund for re-deployment. The purchase of any of OGE Energy's equity, debt or other securities is prohibited. The purchase of equity or debt issues of the portfolio manager's organization is also prohibited. The aggregate positions in any company may not exceed one percent of the fair market value of its outstanding stock. | ||||||||||||||||||||||||||||
Plan Investments | ||||||||||||||||||||||||||||
The following tables summarize OG&E's portion of OGE Energy's Pension Plan's investments that are measured at fair value on a recurring basis at December 31, 2014 and 2013. There were no Level 3 investments held by the Pension Plan at December 31, 2014 and 2013. | ||||||||||||||||||||||||||||
(In millions) | December 31, 2014 | Level 1 | Level 2 | |||||||||||||||||||||||||
Common stocks | ||||||||||||||||||||||||||||
U.S. common stocks | $ | 201.4 | $ | 201.4 | $ | — | ||||||||||||||||||||||
Foreign common stocks | 31.3 | 31.3 | — | |||||||||||||||||||||||||
U.S. Government obligations | ||||||||||||||||||||||||||||
U.S. treasury notes and bonds (A) | 203.2 | 203.2 | — | |||||||||||||||||||||||||
Mortgage-backed securities | 20.6 | — | 20.6 | |||||||||||||||||||||||||
Bonds, debentures and notes (B) | ||||||||||||||||||||||||||||
Corporate fixed income and other securities | 167.1 | — | 167.1 | |||||||||||||||||||||||||
Mortgage-backed securities | 19.3 | — | 19.3 | |||||||||||||||||||||||||
Commingled fund (C) | 25.1 | — | 25.1 | |||||||||||||||||||||||||
Common/collective trust (D) | 29.9 | — | 29.9 | |||||||||||||||||||||||||
Foreign government bonds | 7.2 | — | 7.2 | |||||||||||||||||||||||||
U.S. municipal bonds | 3.5 | — | 3.5 | |||||||||||||||||||||||||
Interest-bearing cash | 0.2 | 0.2 | — | |||||||||||||||||||||||||
Preferred stocks (foreign) | 1.2 | 1.2 | — | |||||||||||||||||||||||||
Forward contracts | ||||||||||||||||||||||||||||
Receivable (foreign currency) | 11.3 | — | 11.3 | |||||||||||||||||||||||||
Payable (foreign currency) | (15.6 | ) | — | (15.6 | ) | |||||||||||||||||||||||
Total Plan investments | $ | 705.7 | $ | 437.3 | $ | 268.4 | ||||||||||||||||||||||
Receivable from broker for securities sold | 3.2 | |||||||||||||||||||||||||||
Interest and dividends receivable | 3.9 | |||||||||||||||||||||||||||
Payable to broker for securities purchased | (33.0 | ) | ||||||||||||||||||||||||||
Plan investments attributable to affiliates | (147.3 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 532.5 | ||||||||||||||||||||||||||
(In millions) | December 31, 2013 | Level 1 | Level 2 | |||||||||||||||||||||||||
Common stocks | ||||||||||||||||||||||||||||
U.S. common stocks | $ | 236.8 | $ | 236.8 | $ | — | ||||||||||||||||||||||
Foreign common stocks | 39.3 | 39.3 | — | |||||||||||||||||||||||||
U.S. Government obligations | ||||||||||||||||||||||||||||
U.S. treasury notes and bonds (A) | 159.8 | 159.8 | — | |||||||||||||||||||||||||
Mortgage-backed securities | 50.3 | — | 50.3 | |||||||||||||||||||||||||
Bonds, debentures and notes (B) | ||||||||||||||||||||||||||||
Corporate fixed income and other securities | 110.6 | — | 110.6 | |||||||||||||||||||||||||
Mortgage-backed securities | 22.3 | — | 22.3 | |||||||||||||||||||||||||
Commingled fund (C) | 29.2 | — | 29.2 | |||||||||||||||||||||||||
Common/collective trust (D) | 26 | — | 26 | |||||||||||||||||||||||||
Foreign government bonds | 4 | — | 4 | |||||||||||||||||||||||||
U.S. municipal bonds | 2 | — | 2 | |||||||||||||||||||||||||
Interest-bearing cash | 0.1 | 0.1 | — | |||||||||||||||||||||||||
Forward contracts | ||||||||||||||||||||||||||||
Receivable (foreign currency) | 1.1 | — | 1.1 | |||||||||||||||||||||||||
Payable (foreign currency) | (1.1 | ) | — | (1.1 | ) | |||||||||||||||||||||||
Total Plan investments | $ | 680.4 | $ | 436 | $ | 244.4 | ||||||||||||||||||||||
Receivable from broker for securities sold | 11.5 | |||||||||||||||||||||||||||
Interest and dividends receivable | 3.2 | |||||||||||||||||||||||||||
Payable to broker for securities purchased | (40.2 | ) | ||||||||||||||||||||||||||
Plan investments attributable to affiliates | (138.4 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 516.5 | ||||||||||||||||||||||||||
(A) | This category represents U.S. treasury notes and bonds with a Moody's Investors Services rating of Aaa and Government Agency Bonds with a Moody's Investors Services rating of A1 or higher. | |||||||||||||||||||||||||||
(B) | This category primarily represents U.S. corporate bonds with an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings. | |||||||||||||||||||||||||||
(C) | This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets. | |||||||||||||||||||||||||||
(D) | This category represents units of participation in an investment pool which primarily invests in foreign or domestic bonds, debentures, mortgages, equipment or other trust certificates, notes, obligations issued or guaranteed by the U.S. Government or its agencies, bank certificates of deposit, bankers' acceptances and repurchase agreements, high grade commercial paper and other instruments with money market characteristics with a fixed or variable interest rate. There are no restrictions on redemptions in the common/collective trust. | |||||||||||||||||||||||||||
The three levels defined in the fair value hierarchy and examples of each are as follows: | ||||||||||||||||||||||||||||
Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible by the Pension Plan at the measurement date. Instruments classified as Level 1 include investments in common and preferred stocks, U.S. treasury notes and bonds, mutual funds and interest-bearing cash. | ||||||||||||||||||||||||||||
Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Instruments classified as Level 2 include corporate fixed income and other securities, mortgage-backed securities, other U.S. Government obligations, commingled fund, a common/collective trust, U.S. municipal bonds, foreign government bonds, a repurchase agreement, money market fund and forward contracts. | ||||||||||||||||||||||||||||
Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the Plan's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). | ||||||||||||||||||||||||||||
Postretirement Benefit Plans | ||||||||||||||||||||||||||||
In addition to providing pension benefits, OGE Energy provides certain medical and life insurance benefits for eligible retired members. Regular, full-time, active employees hired prior to February 1, 2000 whose age and years of credited service total or exceed 80 or have attained at least age 55 with 10 or more years of service at the time of retirement are entitled to postretirement medical benefits while employees hired on or after February 1, 2000 are not entitled to postretirement medical benefits. Eligible retirees must contribute such amount as OGE Energy specifies from time to time toward the cost of coverage for postretirement benefits. The benefits are subject to deductibles, co-payment provisions and other limitations. OG&E charges to expense the postretirement benefit costs and includes an annual amount as a component of the cost-of-service in future ratemaking proceedings. | ||||||||||||||||||||||||||||
OGE Energy's contribution to the medical costs for pre-65 aged eligible retirees are fixed at the 2011 level and OGE Energy covers future annual medical inflationary cost increases up to five percent. Increases in excess of five percent annually are covered by the pre-65 aged retiree in the form of premium increases. OGE Energy provides Medicare-eligible retirees and their Medicare-eligible spouses an annual fixed contribution to OGE Energy's sponsored health reimbursement arrangement. OGE Energy's Medicare-eligible retirees are able to purchase individual insurance policies supplemental to Medicare through a third-party administrator and use their health reimbursement arrangement funds for reimbursement of medical premiums and other eligible medical expenses. | ||||||||||||||||||||||||||||
Plan Investments | ||||||||||||||||||||||||||||
The following tables summarize OG&E's portion of OGE Energy's postretirement benefit plans investments that are measured at fair value on a recurring basis at December 31, 2014 and 2013. There were no Level 2 investments held by the postretirement benefit plans at December 31, 2014 and 2013. | ||||||||||||||||||||||||||||
(In millions) | December 31, 2014 | Level 1 | Level 3 | |||||||||||||||||||||||||
Group retiree medical insurance contract (A) | $ | 51 | $ | — | $ | 51 | ||||||||||||||||||||||
Mutual funds investment | ||||||||||||||||||||||||||||
U.S. equity investments | 8.5 | 8.5 | — | |||||||||||||||||||||||||
Money market funds investment | 0.1 | 0.1 | — | |||||||||||||||||||||||||
Total Plan investments | $ | 59.6 | $ | 8.6 | $ | 51 | ||||||||||||||||||||||
Plan investments attributable to affiliates | (5.4 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 54.2 | ||||||||||||||||||||||||||
(In millions) | December 31, 2013 | Level 1 | Level 3 | |||||||||||||||||||||||||
Group retiree medical insurance contract (A) | $ | 53.1 | $ | — | $ | 53.1 | ||||||||||||||||||||||
Mutual funds investment | ||||||||||||||||||||||||||||
U.S. equity investments | 7.9 | 7.9 | — | |||||||||||||||||||||||||
Money market funds investment | 0.4 | 0.4 | — | |||||||||||||||||||||||||
Total Plan investments | $ | 61.4 | $ | 8.3 | $ | 53.1 | ||||||||||||||||||||||
Plan investments attributable to affiliates | (4.7 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 56.7 | ||||||||||||||||||||||||||
(A) | This category represents a group retiree medical insurance contract which invests in a pool of common stocks, bonds and money market accounts, of which a significant portion is comprised of mortgage-backed securities. | |||||||||||||||||||||||||||
The postretirement benefit plans Level 3 investment includes an investment in a group retiree medical insurance contract. The unobservable input included in the valuation of the contract includes the approach for determining the allocation of the postretirement benefit plans pro-rata share of the total assets in the contract. | ||||||||||||||||||||||||||||
The following table summarizes the postretirement benefit plans investments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3). | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | |||||||||||||||||||||||||||
Group retiree medical insurance contract | ||||||||||||||||||||||||||||
Beginning balance | $ | 53.1 | ||||||||||||||||||||||||||
Net unrealized gains related to instruments held at the reporting date | 1.5 | |||||||||||||||||||||||||||
Interest income | 1 | |||||||||||||||||||||||||||
Dividend income | 0.6 | |||||||||||||||||||||||||||
Realized losses | (0.9 | ) | ||||||||||||||||||||||||||
Claims paid | (4.3 | ) | ||||||||||||||||||||||||||
Ending balance | $ | 51 | ||||||||||||||||||||||||||
Medicare Prescription Drug, Improvement and Modernization Act of 2003 | ||||||||||||||||||||||||||||
The Medicare Prescription Drug, Improvement and Modernization Act of 2003 expanded coverage for prescription drugs. The following table summarizes the gross benefit payments OG&E expects to pay related to its postretirement benefit plans, including prescription drug benefits. | ||||||||||||||||||||||||||||
Gross Projected | ||||||||||||||||||||||||||||
Postretirement | ||||||||||||||||||||||||||||
Benefit | ||||||||||||||||||||||||||||
(In millions) | Payments | |||||||||||||||||||||||||||
2015 | $ | 12.8 | ||||||||||||||||||||||||||
2016 | 13.1 | |||||||||||||||||||||||||||
2017 | 13.3 | |||||||||||||||||||||||||||
2018 | 13.5 | |||||||||||||||||||||||||||
2019 | 13.7 | |||||||||||||||||||||||||||
After 2019 | 67.6 | |||||||||||||||||||||||||||
The following table summarizes the benefit payments OG&E expects to pay related to its Pension Plan and Restoration of Retirement Income Plan. These expected benefits are based on the same assumptions used to measure OGE Energy's benefit obligation at the end of the year and include benefits attributable to estimated future employee service. | ||||||||||||||||||||||||||||
Projected Benefit Payments | ||||||||||||||||||||||||||||
(In millions) | ||||||||||||||||||||||||||||
2015 | $ | 69.5 | ||||||||||||||||||||||||||
2016 | 63.3 | |||||||||||||||||||||||||||
2017 | 56.7 | |||||||||||||||||||||||||||
2018 | 53.2 | |||||||||||||||||||||||||||
2019 | 49.5 | |||||||||||||||||||||||||||
After 2019 | 177.6 | |||||||||||||||||||||||||||
Post-Employment Benefit Plan | ||||||||||||||||||||||||||||
Disabled employees receiving benefits from OGE Energy's Group Long-Term Disability Plan are entitled to continue participating in OGE Energy's Medical Plan along with their dependents. The post-employment benefit obligation represents the actuarial present value of estimated future medical benefits that are attributed to employee service rendered prior to the date as of which such information is presented. The obligation also includes future medical benefits expected to be paid to current employees participating in OGE Energy's Group Long-Term Disability Plan and their dependents, as defined in OGE Energy's Medical Plan. | ||||||||||||||||||||||||||||
The post-employment benefit obligation is determined by an actuary on a basis similar to the accumulated postretirement benefit obligation. The estimated future medical benefits are projected to grow with expected future medical cost trend rates and are discounted for interest at the discount rate and for the probability that the participant will discontinue receiving benefits from OGE Energy's Group Long-Term Disability Plan due to death, recovery from disability, or eligibility for retiree medical benefits. OG&E's post-employment benefit obligation was $1.1 million and $1.4 million at December 31, 2014 and 2013, respectively. | ||||||||||||||||||||||||||||
401(k) Plan | ||||||||||||||||||||||||||||
OGE Energy provides a 401(k) Plan. Each regular full-time employee of OGE Energy or a participating affiliate is eligible to participate in the 401(k) Plan immediately. All other employees of OGE Energy or a participating affiliate are eligible to become participants in the 401(k) Plan after completing one year of service as defined in the 401(k) Plan. Participants may contribute each pay period any whole percentage between two percent and 19 percent of their compensation, as defined in the 401(k) Plan, for that pay period. Participants who have attained age 50 before the close of a year are allowed to make additional contributions referred to as "Catch-Up Contributions," subject to certain limitations of the Code. Participants may designate, at their discretion, all or any portion of their contributions as: (i) a before-tax contribution under Section 401(k) of the Code subject to the limitations thereof; or (ii) a contribution made on an after-tax basis. The 401(k) Plan also includes an eligible automatic contribution arrangement and provides for a qualified default investment alternative consistent with the U.S. Department of Labor regulations. Participants may elect, in accordance with the 401(k) Plan procedures, to have his or her future salary deferral rate to be automatically increased annually on a date and in an amount as specified by the participant in such election. For employees hired or rehired on or after December 1, 2009, OGE Energy contributes to the 401(k) Plan, on behalf of each participant, 200 percent of the participant's contributions up to five percent of compensation. | ||||||||||||||||||||||||||||
No OGE Energy contributions are made with respect to a participant's Catch-Up Contributions, rollover contributions, or with respect to a participant's contributions based on overtime payments, pay-in-lieu of overtime for exempt personnel, special lump-sum recognition awards and lump-sum merit awards included in compensation for determining the amount of participant contributions. Once made, OGE Energy's contribution may be directed to any available investment option in the 401(k) Plan. OGE Energy match contributions vest over a three-year period. After two years of service, participants become 20 percent vested in their OGE Energy contribution account and become fully vested on completing three years of service. In addition, participants fully vest when they are eligible for normal or early retirement under the Pension Plan, in the event of their termination due to death or permanent disability or upon attainment of age 65 while employed by OGE Energy or its affiliates. OG&E contributed $8.2 million, $7.8 million and $7.6 million in 2014, 2013 and 2012, respectively, to the 401(k) Plan. | ||||||||||||||||||||||||||||
Deferred Compensation Plan | ||||||||||||||||||||||||||||
OGE Energy provides a nonqualified deferred compensation plan which is intended to be an unfunded plan. The plan's primary purpose is to provide a tax-deferred capital accumulation vehicle for a select group of management, highly compensated employees and non-employee members of the Board of Directors of OGE Energy and to supplement such employees' 401(k) Plan contributions as well as offering this plan to be competitive in the marketplace. | ||||||||||||||||||||||||||||
Eligible employees who enroll in the plan have the following deferral options: (i) eligible employees may elect to defer up to a maximum of 70 percent of base salary and 100 percent of annual bonus awards or (ii) eligible employees may elect a deferral percentage of base salary and bonus awards based on the deferral percentage elected for a year under the 401(k) Plan with such deferrals to start when maximum deferrals to the qualified 401(k) Plan have been made because of limitations in that plan. Eligible directors who enroll in the plan may elect to defer up to a maximum of 100 percent of directors' meeting fees and annual retainers. OGE Energy matches employee (but not non-employee director) deferrals to make up for any match lost in the 401(k) Plan because of deferrals to the deferred compensation plan, and to allow for a match that would have been made under the 401(k) Plan on that portion of either the first six percent of total compensation or the first five percent of total compensation, depending on prior participant elections, deferred that exceeds the limits allowed in the 401(k) Plan. Matching credits vest based on years of service, with full vesting after three years or, if earlier, on retirement, disability, death, a change in control of OGE Energy or termination of the plan. Deferrals, plus any OGE Energy match, are credited to a recordkeeping account in the participant's name. Earnings on the deferrals are indexed to the assumed investment funds selected by the participant. In 2014, those investment options included an OGE Energy Common Stock fund, whose value was determined based on the stock price of OGE Energy's Common Stock. | ||||||||||||||||||||||||||||
Supplemental Executive Retirement Plan | ||||||||||||||||||||||||||||
OGE Energy provides a supplemental executive retirement plan in order to attract and retain lateral hires or other executives designated by the Compensation Committee of OGE Energy's Board of Directors who may not otherwise qualify for a sufficient level of benefits under OGE Energy's Pension Plan and Restoration of Retirement Income Plan. The supplemental executive retirement plan is intended to be an unfunded plan and not subject to the benefit limitations of the Code. |
Commitments_and_Contingencies
Commitments and Contingencies | 12 Months Ended | |||||||||||||||||||||
Dec. 31, 2014 | ||||||||||||||||||||||
Commitments and Contingencies Disclosure [Abstract] | ||||||||||||||||||||||
Commitments and Contingencies | Commitments and Contingencies | |||||||||||||||||||||
Operating Lease Obligations | ||||||||||||||||||||||
OG&E has operating lease obligations expiring at various dates, primarily for railcar leases and wind farm land leases. Future minimum payments for noncancellable operating leases are as follows: | ||||||||||||||||||||||
Year ended December 31 (In millions) | 2015 | 2016 | 2017 | 2018 | 2019 | After 2019 | Total | |||||||||||||||
Operating lease obligations | ||||||||||||||||||||||
Railcars | $ | 4.5 | $ | 28.7 | $ | 1 | $ | — | $ | — | $ | — | $ | 34.2 | ||||||||
Wind farm land leases | 2.1 | 2.1 | 2.4 | 2.4 | 2.4 | 46.4 | 57.8 | |||||||||||||||
Total operating lease obligations | $ | 6.6 | $ | 30.8 | $ | 3.4 | $ | 2.4 | $ | 2.4 | $ | 46.4 | $ | 92 | ||||||||
Payments for operating lease obligations were $5.9 million, $5.7 million and $5.8 million for the years ended December 31, 2014, 2013 and 2012, respectively. | ||||||||||||||||||||||
Railcar Lease Agreement | ||||||||||||||||||||||
OG&E has a noncancellable operating lease with purchase options, covering 1,387 coal rotary gondola railcars to transport coal from Wyoming to OG&E's coal-fired generation units. Rental payments are charged to Fuel Expense and are recovered through OG&E's tariffs and fuel adjustment clauses. On December 15, 2010, OG&E renewed the lease agreement effective February 1, 2011. At the end of the new lease term, which is February 1, 2016, OG&E has the option to either purchase the railcars at a stipulated fair market value or renew the lease. If OG&E chooses not to purchase the railcars or renew the lease agreement and the actual fair value of the railcars is less than the stipulated fair market value, OG&E would be responsible for the difference in those values up to a maximum of $22.8 million. OG&E is also required to maintain all of the railcars it has under the operating lease and has entered into an agreement with a non-affiliated company to furnish this maintenance. | ||||||||||||||||||||||
On January 11, 2012, OG&E executed a five-year lease agreement for 135 railcars to replace railcars that have been taken out of service or destroyed. OG&E has a unilateral right to terminate this lease upon a 6-month notice effective April 2016. | ||||||||||||||||||||||
On October 14, 2014, OG&E signed a three-year lease effective beginning December 2014 for 131 railcars to replace railcars that have been taken out of service or destroyed. | ||||||||||||||||||||||
Wind Farm Land Lease Agreements | ||||||||||||||||||||||
OG&E has wind farm land operating leases for its Centennial, OU Spirit and Crossroads wind farms expiring at various dates. The Centennial lease has rent escalations which increase annually based on the Consumer Price Index. The OU Spirit and Crossroads leases have rent escalations which increase after five and 10 years. Although the leases are cancellable, OG&E is required to make annual lease payments as long as the wind turbines are located on the land. OG&E does not expect to terminate the leases until the wind turbines reach the end of their economic life. | ||||||||||||||||||||||
Other Purchase Obligations and Commitments | ||||||||||||||||||||||
OG&E's other future purchase obligations and commitments estimated for the next five years are as follows: | ||||||||||||||||||||||
(In millions) | 2015 | 2016 | 2017 | 2018 | 2019 | Total | ||||||||||||||||
Other purchase obligations and commitments | ||||||||||||||||||||||
Cogeneration capacity and fixed operation and maintenance payments | $ | 85.2 | $ | 83.3 | $ | 80.7 | $ | 77.8 | $ | 70.6 | $ | 397.6 | ||||||||||
Expected cogeneration energy payments | 74.4 | 78.5 | 81.2 | 89.7 | 85.1 | 408.9 | ||||||||||||||||
Minimum fuel purchase commitments | 389.3 | 246.6 | 43.6 | — | — | 679.5 | ||||||||||||||||
Expected wind purchase commitments | 58.4 | 59.3 | 60.3 | 59.1 | 58.4 | 295.5 | ||||||||||||||||
Long-term service agreement commitments | 2.5 | 2.6 | 2.7 | 19.4 | 27.5 | 54.7 | ||||||||||||||||
Environmental compliance plan expenditures | 66.5 | 138.1 | 117.6 | 50.1 | 3.9 | 376.2 | ||||||||||||||||
Total other purchase obligations and commitments | $ | 676.3 | $ | 608.4 | $ | 386.1 | $ | 296.1 | $ | 245.5 | $ | 2,212.40 | ||||||||||
Public Utility Regulatory Policy Act of 1978 | ||||||||||||||||||||||
At December 31, 2014, OG&E has QF contracts having terms of 15 to 32 years. These contracts were entered into pursuant to the Public Utility Regulatory Policy Act of 1978. Stated generally, the Public Utility Regulatory Policy Act of 1978 and the regulations thereunder promulgated by the FERC require OG&E to purchase power generated in a manufacturing process from a QF. The rate for such power to be paid by OG&E was approved by the OCC. The rate generally consists of two components: one is a rate for actual electricity purchased from the QF by OG&E; the other is a capacity charge, which OG&E must pay the QF for having the capacity available. However, if no electrical power is made available to OG&E for a period of time (generally three months), OG&E's obligation to pay the capacity charge is suspended. The total cost of cogeneration payments is recoverable in rates from customers. For the 320 MW AES-Shady Point, Inc. QF contract and the 120 MW Oklahoma Cogeneration, LLC QF contract, OG&E purchases 100 percent of the electricity generated by the QFs. | ||||||||||||||||||||||
For the years ended December 31, 2014, 2013 and 2012, OG&E made total payments to cogenerators of $129.4 million, $134.8 million and $135.1 million, respectively, of which $72.3 million, $74.4 million and $77.1 million, respectively, represented capacity payments. All payments for purchased power, including cogeneration, are included in the Statements of Income as Cost of Sales. | ||||||||||||||||||||||
Minimum Fuel Purchase Commitments | ||||||||||||||||||||||
OG&E purchased necessary fuel supplies of coal and natural gas for its generating units of $625.8 million, $680.8 million and $653.7 million for the years ended December 31, 2014, 2013 and 2012, respectively. OG&E has coal contracts for purchases through December 2016. As a participant in the SPP integrated marketplace, OG&E now purchases a relatively small percentage of its supply through term gas agreements. Alternatively, OG&E relies on a combination of call natural gas agreements, whereby OG&E has the right but not the obligation to purchase a defined quantity of natural gas, combined with day and intra-day purchases to meet the demands of the SPP market. | ||||||||||||||||||||||
Wind Purchase Commitments | ||||||||||||||||||||||
OG&E's current wind power portfolio includes the following, in addition to the 120 MW Centennial, 101 MW OU Spirit and 227.5 MW Crossroads wind farms owned by OG&E: (i) access to up to 50 MWs of electricity generated at a wind farm near Woodward, Oklahoma from a 15-year contract OG&E entered into with FPL Energy that expires in 2018, (ii) access to up to 152 MWs of electricity generated at a wind farm in Woodward County, Oklahoma from a 20-year contract OG&E entered into with CPV Keenan that expires in 2030, (iii) access to up to 130 MWs of electricity generated at a wind farm in Dewey County, Oklahoma from a 20-year contract OG&E entered into with Edison Mission Energy that expires in 2030 and (iv) access to up to 60 MWs of electricity generated at a wind farm near Blackwell, Oklahoma from a 20-year contract OG&E entered into with NextEra Energy that expires in 2032. | ||||||||||||||||||||||
The following table summarizes OG&E's wind power purchases for the years ended December 31, 2014, 2013 and 2012. | ||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||
CPV Keenan | $ | 28.1 | $ | 30.9 | $ | 25.1 | ||||||||||||||||
Edison Mission Energy | 21.3 | 20.6 | 20.2 | |||||||||||||||||||
FPL Energy | 3.6 | 3.3 | 3.4 | |||||||||||||||||||
NextEra Energy | 7.8 | 7.2 | 0.8 | |||||||||||||||||||
Total wind power purchased | $ | 60.8 | $ | 62 | $ | 49.5 | ||||||||||||||||
Long-Term Service Agreement Commitments | ||||||||||||||||||||||
OG&E has a long-term parts and service maintenance contract for the upkeep of the McClain Plant. The previous contract expired on January 1, 2015. The current contract, which was signed in May 2013, is expected to run for the earlier of 128,000 factored-fired hours or 3,600 factored-fired starts. Based on historical usage and current expectations for future usage, this contract is expected to run until 2030. The contract requires payments based on both a fixed and variable cost component, depending on how much the McClain Plant is used. | ||||||||||||||||||||||
OG&E has a long-term parts and service maintenance contract for the upkeep of the Redbud Plant. In March 2013, the contract was amended to extend the contract coverage for an additional 24,000 factored-fired hours resulting in a maximum of the earlier of 144,000 factored-fired hours or 4,500 factored-fired starts. Based on historical usage and current expectations for future usage, this contract is expected to run until 2031. The contract requires payments based on both a fixed and variable cost component, depending on how much the Redbud Plant is used. | ||||||||||||||||||||||
Enable Gas Transportation and Storage Agreement | ||||||||||||||||||||||
OG&E contracts with Enable for gas transportation and storage services. The stated term of this contract expired April 30, 2009, but remained in effect from year-to-year thereafter. On January 31, 2014, in anticipation of entering into a new, five-year contract, OG&E provided written notice of termination of the contract, effective April 30, 2014. On March 17, 2014, OG&E entered into a new five year firm no-notice load following gas transportation contract with Enable effective May 1, 2014. | ||||||||||||||||||||||
Environmental Laws and Regulations | ||||||||||||||||||||||
The activities of OG&E are subject to numerous, stringent and complex Federal, state and local laws and regulations governing environmental protection. These laws and regulations can change, restrict or otherwise impact OG&E's business activities in many ways including the handling or disposal of waste material, future construction activities to avoid or mitigate harm to threatened or endangered species and requiring the installation and operation of emissions pollution control equipment. Failure to comply with these laws and regulations could result in the assessment of administrative, civil and criminal penalties, the imposition of remedial requirements and the issuance of orders enjoining future operations. OG&E believes that its operations are in substantial compliance with current Federal, state and local environmental standards. | ||||||||||||||||||||||
Environmental regulation can increase the cost of planning, design, initial installation and operation of OG&E's facilities. Historically, OG&E's total expenditures for environmental control facilities and for remediation have not been significant in relation to its financial position or results of operations. OG&E believes, however, that it is reasonably likely that the trend in environmental legislation and regulations will continue towards more restrictive standards. Compliance with these standards is expected to increase the cost of conducting business. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market. | ||||||||||||||||||||||
OG&E is managing several significant uncertainties about the scope and timing for the acquisition, installation and operation of additional pollution control equipment and compliance costs for a variety of the EPA rules that are being challenged in court. OG&E is unable to predict the financial impact of these matters with certainty at this time. | ||||||||||||||||||||||
Federal Clean Air Act New Source Review Litigation | ||||||||||||||||||||||
As previously reported, in July 2008, OG&E received a request for information from the EPA regarding Federal Clean Air Act compliance at OG&E's Muskogee and Sooner generating plants. | ||||||||||||||||||||||
On July 8, 2013, the Department of Justice filed a complaint against OG&E in United States District Court for the Western District of Oklahoma alleging that OG&E did not follow the Federal Clean Air Act procedures for projecting emission increases attributable to eight projects that occurred between 2003 and 2006. This complaint seeks to have OG&E submit a new assessment of whether the projects were likely to result in a significant emissions increase. The Sierra Club intervened in this proceeding. On August 30, 2013, the Government filed a Motion for Summary Judgment and on September 6, 2013, OG&E filed a Motion to Dismiss the case. On January 15, 2015, U.S. District Judge Timothy DeGuisti dismissed the complaints filed by EPA and Sierra Club. The Court held that it lacked subject matter jurisdiction over Plaintiffs’ claims because Plaintiffs failed to present an actual “case or controversy” as required by Article III of the Constitution. The court also ruled in the alternative that, even if Plaintiffs had presented a case or controversy, it would have nonetheless “decline[d] to exercise jurisdiction.” EPA and the Sierra Club have until March 16, 2015 to file an appeal of the Court’s ruling. | ||||||||||||||||||||||
On August 12, 2013, the Sierra Club filed a separate complaint against OG&E in the United States District Court for the Eastern District of Oklahoma alleging that OG&E projects at Muskogee Unit 6 in 2008 were made without obtaining a prevention of significant deterioration permit and that the plant had exceeded emissions limits for opacity and particulate matter. The Sierra Club seeks a permanent injunction preventing OG&E from operating the Muskogee generating plant. On March 4, 2014, the Eastern District dismissed the prevention of significant deterioration permit claim based on the statute of limitations, but allowed the opacity and particulate matter claims to proceed. To obtain the right to appeal this decision, the Sierra Club subsequently withdrew a Notice of Intent to Sue for additional Clean Air Act violations and asked the Eastern District to dismiss its remaining claims with prejudice. On August 27, 2014, the Eastern District granted the Sierra Club's request. The Sierra Club has filed a Notice of Appeal with the 10th Circuit where oral argument is currently scheduled for March 18, 2015. | ||||||||||||||||||||||
At this time, OG&E continues to believe that it has acted in compliance with the Federal Clean Air Act, and OG&E expects to vigorously defend against the claims that have been asserted. If OG&E does not prevail in the remainder of the proceedings, the EPA and the Sierra Club could seek to require OG&E to install additional pollution control equipment, including scrubbers, baghouses and selective catalytic reduction systems with capital costs in excess of $1.1 billion and pay fines and significant penalties as a result of the allegations in the notice of violation. Section 113 of the Federal Clean Air Act (along with the Federal Civil Penalties Inflation Adjustment Act of 1996) provides for civil penalties as much as $37,500 per day for each violation. Due to the uncertain and preliminary nature of this litigation, OG&E cannot provide a range of reasonably possible loss in this case. | ||||||||||||||||||||||
Air Quality Control System | ||||||||||||||||||||||
On September 10, 2014, OG&E executed a contract for the design, engineering and fabrication of two circulating dry scrubber systems to be installed at Sooner Units 1 and 2. OG&E entered into an agreement on February 9, 2015, to install the scrubber systems. The scrubbers are part of OG&E’s Environmental Compliance Plan and scheduled to be completed by 2019. More detail regarding the Environmental Plan can be found under the “Pending Regulatory Matters” in Note 13. | ||||||||||||||||||||||
Other | ||||||||||||||||||||||
In the normal course of business, OG&E is confronted with issues or events that may result in a contingent liability. These generally relate to lawsuits or claims made by third parties, including governmental agencies. When appropriate, management consults with legal counsel and other appropriate experts to assess the claim. If, in management's opinion, OG&E has incurred a probable loss as set forth by GAAP, an estimate is made of the loss and the appropriate accounting entries are reflected in OG&E's Financial Statements. At the present time, based on currently available information, OG&E believes that any reasonably possible losses in excess of accrued amounts arising out of pending or threatened lawsuits or claims would not be quantitatively material to its financial statements and would not have a material adverse effect on OG&E's financial position, results of operations or cash flows. |
Rate_Matters_and_Regulation
Rate Matters and Regulation | 12 Months Ended |
Dec. 31, 2014 | |
Regulated Operations [Abstract] | |
Rate Matters and Regulation | Rate Matters and Regulation |
Regulation and Rates | |
OG&E's retail electric tariffs are regulated by the OCC in Oklahoma and by the APSC in Arkansas. The issuance of certain securities by OG&E is also regulated by the OCC and the APSC. OG&E's wholesale electric tariffs, transmission activities, short-term borrowing authorization and accounting practices are subject to the jurisdiction of the FERC. The Secretary of the U.S. Department of Energy has jurisdiction over some of OG&E's facilities and operations. In 2014, 84 percent of OG&E's electric revenue was subject to the jurisdiction of the OCC, eight percent to the APSC and eight percent to the FERC. | |
The OCC issued an order in 1996 authorizing OG&E to reorganize into a subsidiary of OGE Energy. The order required that, among other things, (i) OGE Energy permit the OCC access to the books and records of OGE Energy and its affiliates relating to transactions with OG&E, (ii) OGE Energy employ accounting and other procedures and controls to protect against subsidization of non-utility activities by OG&E's customers and (iii) OGE Energy refrain from pledging OG&E assets or income for affiliate transactions. In addition, the Energy Policy Act of 2005 enacted the Public Utility Holding Company Act of 2005, which in turn granted to the FERC access to the books and records of OGE Energy and its affiliates as the FERC deems relevant to costs incurred by OG&E or necessary or appropriate for the protection of utility customers with respect to the FERC jurisdictional rates. | |
Completed Regulatory Matters | |
Market-Based Rate Authority | |
On June 29, 2012, OG&E filed its triennial market power update with the FERC to retain its market-based rate authorization in the SPP's energy imbalance service market but to surrender its market-based rate authorization for any market-based rates sales outside of the SPP's energy imbalance service market. On May 2, 2013, the FERC issued an order accepting OG&E's June 2012 triennial market power update. | |
On December 30, 2013, OG&E submitted to the FERC a market-based rate change in status filing and a revised market-based rate tariff that would authorize OG&E to (i) sell electric energy and capacity at market-based rates without geographic restriction, and (ii) sell ancillary services in the SPP and Midcontinent Independent System Operator, Inc. markets. The primary goal of this filing was to implement the market-based rate authority OG&E needs to fully participate in SPP’s Integrated Marketplace. On February 28, 2014, FERC issued a letter order accepting OG&E’s market-based rate filing and tariff effective March 1, 2014. FERC found that OG&E passed the market power screens and satisfied requirements related to horizontal market power and vertical market power. | |
Section 206 Complaint | |
On November 26, 2013, Arkansas Electric Cooperative Corporation filed a complaint at the FERC against OG&E, arguing that the wholesale formula rate contract between OG&E and Arkansas Electric Cooperative Corporation (formerly between OG&E and Arkansas Valley Electric Cooperative) is unjust and unreasonable with respect to several items. OG&E and Arkansas Electric Cooperative Corporation agreed to terms of a settlement and filed the offer of settlement with the FERC on February 24, 2014. On April 17, 2014, the FERC accepted the settlement making it effective March 1, 2014. The reduction in revenue for 2014 was $0.9 million. | |
Fuel Adjustment Clause Review for Calendar Year 2012 | |
The OCC routinely reviews the costs recovered from customers through OG&E's fuel adjustment clause. On July 31, 2013, the OCC Staff filed an application to review OG&E's fuel adjustment clause for calendar year 2012, including the prudence of OG&E's electric generation, purchased power and fuel procurement costs. OG&E filed the necessary information and documents needed to satisfy the OCC's minimum filing requirement rules on October 9, 2013. On April 24, 2014, the OCC administrative law judge at the hearing, on the merits, recommended that the OCC find that OG&E's 2012 electric generation, purchased power and fuel procurement processes and costs were prudent. On June 10, 2014, the OCC issued an order approving OG&E’s practices, policies and judgment regarding its electric generation, purchased power, and fuel procurement processes and costs for the calendar year 2012. The order also found that the costs were prudent, reasonable, and mathematically correct. | |
Integrated Resource Plans | |
In June 2014, OG&E initiated the process to update its Integrated Resource Plans in Oklahoma and Arkansas at OG&E's discretion. The prior Integrated Resource Plan, submitted in 2012, assumed that the Oklahoma SIP would be followed to comply with Regional Haze requirements. Subsequent to holding technical conferences and public stakeholder meetings, OG&E submitted its revised Integrated Resource Plans, which included its environmental compliance plan described below, to the OCC on August 4, 2014 and to the APSC on September 8, 2014. | |
Pending Regulatory Matters | |
FERC Order No. 1000, Final Rule on Transmission Planning and Cost Allocation | |
On July 21, 2011, the FERC issued Order No. 1000, which revised the FERC's existing regulations governing the process for planning enhancements and expansions of the electric transmission grid in a particular region, along with the corresponding process for allocating the costs of such expansions. Order No. 1000 leaves to individual regions to determine whether a previously-approved project is subject to reevaluation and is therefore governed by the new rule. | |
Order No. 1000 requires, among other things, public utility transmission providers, such as the SPP, to participate in a process that produces a regional transmission plan satisfying certain standards, and requires that each such regional process consider transmission needs driven by public policy requirements (such as state or Federal policies favoring increased use of renewable energy resources). Order No. 1000 also directs public utility transmission providers to coordinate with neighboring transmission planning regions. In addition, Order No. 1000 establishes specific regional cost allocation principles and directs public utility transmission providers to participate in regional and interregional transmission planning processes that satisfy these principles. | |
On the issue of determining how entities are to be selected to develop and construct the specific transmission projects, Order No. 1000 directs public utility transmission providers to remove from the FERC-jurisdictional tariffs and agreements provisions that establish any Federal "right of first refusal" for the incumbent transmission owner (such as OG&E) regarding transmission facilities selected in a regional transmission planning process, subject to certain limitations. However, Order No. 1000 is not intended to affect the right of an incumbent transmission owner (such as OG&E) to build, own and recover costs for upgrades to its own transmission facilities, and Order No. 1000 does not alter an incumbent transmission owner's use and control of existing rights of way. Order No. 1000 also clarifies that incumbent transmission owners may rely on regional transmission facilities to meet their reliability needs or service obligations. The SPP's pre-Order No. 1000 tariff included a "right of first refusal" for incumbent transmission owners and this provision has played a role in OG&E being selected by the SPP to build previous transmission projects in Oklahoma. These changes to the "right of first refusal" apply only to "new transmission facilities," which are facilities subject to evaluation or reevaluation (under the applicable local or regional transmission planning process) after November 13, 2012. On May 29, 2013, the Governor signed House Bill 1932 into law which establishes a right of first refusal for Oklahoma incumbent transmission owners, including OG&E, to build new transmission projects with voltages under 300 kilovolts that interconnect to those incumbent owners' existing facilities. OG&E believes this law is consistent with the language of Order No. 1000. On August 15, 2014, the U.S. Court of Appeals for the D.C. Circuit issued an order denying all appeals of Order No. 1000. | |
The FERC has issued two orders on the SPP's Order No. 1000 compliance filings. In its most recent order, issued October 16, 2014, the FERC confirmed that “right of first refusal” language should be removed from the SPP tariff and Membership Agreement as applied to most transmission facilities, but that several types of facilities would remain subject to a right of first refusal. Projects that retained the right of first refusal included facilities that would operate below 100 kilovolts, facilities selected as part of the SPP’s Aggregate Study process, and short-term reliability projects. The FERC also approved SPP’s new competitive solicitation process for projects that are not subject to a right of first refusal. FERC found that SPP may consider state and local laws and regulations when deciding whether SPP will hold a competitive solicitation for a proposed project. On December 15, 2014, OG&E filed an appeal in the District of Columbia Circuit Court of Appeals of a portion of the October 2014 FERC order requiring removal of the right of first refusal language from the Membership Agreement. The court has not yet acted on OG&E's appeal. | |
OGE Energy cannot, at this time, determine the precise impact of Order No. 1000 on OG&E. OGE Energy has no reason to believe that the implementation of Order No. 1000 will impact OG&E's transmission projects currently under development and construction for which OG&E has received a notice to proceed from the SPP. | |
Energy Efficiency Program Filing | |
On February 14, 2014, OG&E filed an application with the APSC requesting approval of interim modifications to approved Energy Efficiency Programs, new tariff revisions and the waiver of certain provisions of the Commission’s Rules for Conservation and Energy Efficiency Programs. | |
Environmental Compliance Plan | |
On August 6, 2014, OG&E filed an application with the OCC for approval of its plan to comply with EPA’s MATS and Regional Haze FIP while serving the best long-term interests of customers in light of future environmental uncertainties. The application seeks approval of the environmental compliance plan and for a recovery mechanism for the associated costs. The environmental compliance plan includes installing dry scrubbers at Sooner Units 1 and 2 and the conversion of Muskogee Units 4 and 5 to natural gas. The application also asks the Commission to predetermine the prudence of replacing OG&E's soon-to-be retired Mustang steam turbines in late 2017 (approximately 460 MW) with 400 MW of new, efficient combustion turbines at the Mustang site in 2018 and 2019 and approval for a recovery mechanism for the associated costs. OG&E estimates the total capital cost associated with its environmental compliance plan included in this application to be approximately $1.1 billion. The OCC hearing on OG&E's application is scheduled to commence on March 3, 2015. Multiple parties advocating a variety of positions have intervened in the proceeding. OG&E expects a ruling from the OCC in the second quarter of 2015. At this time, OG&E cannot predict the outcome of the proceeding. OG&E plans to file applications in the first quarter of 2015 seeking related approvals from the APSC. | |
Fuel Adjustment Clause Review for Calendar Year 2013 | |
The OCC routinely reviews the costs recovered from customers through OG&E's fuel adjustment clause. On July 31, 2014, the OCC Staff filed an application to review OG&E's fuel adjustment clause for calendar year 2013, including the prudence of OG&E's electric generation, purchased power and fuel procurement costs. OG&E filed the necessary information and documents needed to satisfy the OCC's minimum filing requirement rules on September 29, 2014. A procedural schedule has not been established as of this date. OG&E expects an order in the second quarter of 2015. |
Quarterly_Financial_Data
Quarterly Financial Data | 12 Months Ended | ||||||||||||||||
Dec. 31, 2014 | |||||||||||||||||
Quarterly Financial Data [Abstract] | |||||||||||||||||
Quarterly Financial Information [Text Block] | Quarterly Financial Data (Unaudited) | ||||||||||||||||
Due to the seasonal fluctuations and other factors of OG&E's business, the operating results for interim periods are not necessarily indicative of the results that may be expected for the year. In OG&E's opinion, the following quarterly financial data includes all adjustments, consisting of normal recurring adjustments, necessary to fairly present such amounts. Summarized quarterly unaudited financial data is as follows: | |||||||||||||||||
Quarter ended (In millions) | 31-Mar | 30-Jun | 30-Sep | 31-Dec | Total | ||||||||||||
Operating revenues | 2014 | $ | 560.4 | $ | 611.8 | $ | 754.7 | $ | 526.2 | $ | 2,453.10 | ||||||
2013 | $ | 455.5 | $ | 574.6 | $ | 723.2 | $ | 508.9 | $ | 2,262.20 | |||||||
Operating income | 2014 | $ | 61.8 | $ | 142.2 | $ | 248.4 | $ | 85.6 | $ | 538 | ||||||
2013 | $ | 52.9 | $ | 138.1 | $ | 261 | $ | 73.3 | $ | 525.3 | |||||||
Net income | 2014 | $ | 20.7 | $ | 76.9 | $ | 157.3 | $ | 37.1 | $ | 292 | ||||||
2013 | $ | 13 | $ | 79 | $ | 171.5 | $ | 29.1 | $ | 292.6 | |||||||
Schedule_II
Schedule II | 12 Months Ended | ||||||||||||
Dec. 31, 2014 | |||||||||||||
Schedule II [Abstract] | |||||||||||||
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | OKLAHOMA GAS AND ELECTRIC COMPANY | ||||||||||||
SCHEDULE II - Valuation and Qualifying Accounts | |||||||||||||
Additions | |||||||||||||
Description | Balance at Beginning of Period | Charged to Costs and Expenses | Deductions (A) | Balance at End of Period | |||||||||
(In millions) | |||||||||||||
Balance at December 31, 2012 | |||||||||||||
Reserve for Uncollectible Accounts | $ | 3.7 | $ | 3.3 | $ | 4.4 | $ | 2.6 | |||||
Balance at December 31, 2013 | |||||||||||||
Reserve for Uncollectible Accounts | $ | 2.6 | $ | 2.5 | $ | 3.2 | $ | 1.9 | |||||
Balance at December 31, 2014 | |||||||||||||
Reserve for Uncollectible Accounts | $ | 1.9 | $ | 2.3 | $ | 2.6 | $ | 1.6 | |||||
(A) | Uncollectible accounts receivable written off, net of recoveries. |
Summary_of_Significant_Account1
Summary of Significant Accounting Policies (Policies) | 12 Months Ended | |||||||
Dec. 31, 2014 | ||||||||
Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||||||
Basis of Accounting, Policy [Policy Text Block] | Basis of Presentation | |||||||
In the opinion of management, all adjustments necessary to fairly present the financial position of OG&E at December 31, 2014 and 2013 and the results of its operations and cash flows for the years ended December 31, 2014, 2013 and 2012, have been included and are of a normal recurring nature except as otherwise disclosed. | ||||||||
Public Utilities, Policy [Policy Text Block] | Accounting Records | |||||||
The accounting records of OG&E are maintained in accordance with the Uniform System of Accounts prescribed by the FERC and adopted by the OCC and the APSC. Additionally, OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. | ||||||||
OG&E records certain incurred costs and obligations as regulatory assets or liabilities if it is probable, based on regulatory orders or other available evidence, that the cost or obligation will be included in amounts allowable for recovery or refund in future rates. | ||||||||
Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets, which could have significant financial effects. | ||||||||
Use of Estimates, Policy [Policy Text Block] | Use of Estimates | |||||||
In preparing the Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the Financial Statements and the reported amounts of revenues and expenses during the reporting period. Changes to these assumptions and estimates could have a material effect on OG&E's Financial Statements. However, OG&E believes it has taken reasonable positions where assumptions and estimates are used in order to minimize the negative financial impact to OG&E that could result if actual results vary from the assumptions and estimates. In management's opinion, the areas of OG&E where the most significant judgment is exercised includes the determination of Pension Plan assumptions, income taxes, contingency reserves, asset retirement obligations, and depreciable lives of property, plant and equipment, the existence of regulatory assets and liabilities and unbilled revenues. | ||||||||
Cash and Cash Equivalents, Policy [Policy Text Block] | Cash and Cash Equivalents | |||||||
For purposes of the Financial Statements, OG&E considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. These investments are carried at cost, which approximates fair value. | ||||||||
Allowance for Doubtful Accounts, Policy [Policy Text Block] | Allowance for Uncollectible Accounts Receivable | |||||||
Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is calculated by multiplying the last six months of electric revenue by the provision rate. The provision rate is based on a 12-month historical average of actual balances written off. To the extent the historical collection rates are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. The allowance for uncollectible accounts receivable was $1.6 million and $1.9 million at December 31, 2014 and 2013, respectively. | ||||||||
New business customers are required to provide a security deposit in the form of cash, bond or irrevocable letter of credit that is refunded when the account is closed. New residential customers, whose outside credit scores indicate an elevated risk, are required to provide a security deposit that is refunded based on customer protection rules defined by the OCC and the APSC. The payment behavior of all existing customers is continuously monitored and, if the payment behavior indicates sufficient risk within the meaning of the applicable utility regulation, customers will be required to provide a security deposit. | ||||||||
Inventory, Policy [Policy Text Block] | Fuel Inventories | |||||||
Fuel inventories for the generation of electricity consist of coal, natural gas and oil. OG&E uses the weighted-average cost method of accounting for inventory that is physically added to or withdrawn from storage or stockpiles. The amount of fuel inventory was $66.7 million and $74.4 million at December 31, 2014 and 2013, respectively. | ||||||||
Property, Plant and Equipment, Policy [Policy Text Block] | Property, Plant and Equipment | |||||||
All property, plant and equipment is recorded at cost. Newly constructed plant is added to plant balances at cost which includes contracted services, direct labor, materials, overhead, transportation costs and the allowance for funds used during construction. Replacements of units of property are capitalized as plant. For assets that belong to a common plant account, the replaced plant is removed from plant balances and the cost of such property is charged to Accumulated Depreciation. For assets that do not belong to a common plant account, the replaced plant is removed from plant balances with the related accumulated depreciation and the remaining balance net of any salvage proceeds is recorded as a loss in the Statements of Income as Other Expense. Repair and replacement of minor items of property are included in the Statements of Income as Other Operation and Maintenance Expense. | ||||||||
Depreciation and Amortization, Policy [Policy Text Block] | Depreciation and Amortization | |||||||
The provision for depreciation, which was 2.8 percent of the average depreciable utility plant for both 2014 and 2013, is provided on a straight-line method over the estimated service life of the utility assets. Depreciation is provided at the unit level for production plant and at the account or sub-account level for all other plant, and is based on the average life group method. In 2015, the provision for depreciation is projected to be 2.8 percent of the average depreciable utility plant. Amortization of intangible assets is computed using the straight-line method. Of the remaining amortizable intangible plant balance at December 31, 2014, 96.0 percent will be amortized over 9 years with 4.0 percent of the remaining amortizable intangible plant balance at December 31, 2014 being amortized over 26 years. Amortization of plant acquisition adjustments is provided on a straight-line basis over the estimated remaining service life of the acquired asset. Plant acquisition adjustments include $148.3 million for the Redbud Plant, which are being amortized over a 27-year life and $3.3 million for certain substation facilities in OG&E's service territory, which are being amortized over a 37 to 59-year | ||||||||
Asset Retirement Obligations, Policy [Policy Text Block] | Asset Retirement Obligations | |||||||
OG&E has previously recorded asset retirement obligations that are being amortized over their respective lives ranging from 4 to 74 years. | ||||||||
Allowance for Funds Used During Construction, Policy [Policy Text Block] | Allowance for Funds Used During Construction | |||||||
Allowance for funds used during construction is calculated according to the FERC pronouncements for the imputed cost of equity and borrowed funds. Allowance for funds used during construction, a non-cash item, is reflected as an increase to net other income and a reduction to interest expense in the Statements of Income and as an increase to Construction Work in Progress in the Balance Sheets. Allowance for funds used during construction rates, compounded semi-annually, were 6.92 percent, 8.33 percent and 8.93 percent for the years ended December 31, 2014, 2013 and 2012, respectively. The decrease in the allowance for funds used during construction rates in 2014 was primarily due to two factors. First, an increase in the average daily balance of short-term debt resulted in less equity being required to finance construction projects, which caused the equity portion of allowance for funds using during construction to decrease. Second, that same increase in the average daily balance of short-term debt allowed the interest and fixed commercial paper fees to be lower per dollar of short term debt, resulting in a lower short term debt rate which caused the debt portion of allowance for funds used during construction to decrease. | ||||||||
Collection of Sales Tax, Policy [Policy Text Block] | Collection of Sales Tax | |||||||
In the normal course of its operations, OG&E collects sales tax from its customers. OG&E records a current liability for sales taxes when it bills its customers and eliminates this liability when the taxes are remitted to the appropriate governmental authorities. OG&E excludes the sales tax collected from its operating revenues. | ||||||||
Revenue Recognition, Policy [Policy Text Block] | General | |||||||
OG&E reads its customers' meters and sends bills to its customers throughout each month. As a result, there is a significant amount of customers' electricity consumption that has not been billed at the end of each month. Unbilled revenue is presented in Accrued Unbilled Revenues on the Balance Sheets and in Operating Revenues on the Statements of Income based on estimates of usage and prices during the period. The estimates that management uses in this calculation could vary from the actual amounts to be paid by customers. | ||||||||
SPP Purchases and Sales | ||||||||
OG&E currently owns and operates transmission and generation facilities as part of a vertically integrated utility. OG&E is a member of the SPP regional transmission organization and has transferred operational authority, but not ownership, of OG&E's transmission facilities to the SPP. On March 1, 2014, the SPP implemented FERC approved regional day ahead and real-time markets for energy and operating services, as well as associated transmission congestion rights. Collectively the three markets operate together under the global name, SPP Integrated Marketplace. OG&E represents owned and contracted generation assets, and customer load in the SPP Integrated Marketplace for the sole benefit of its customers. OG&E has not participated in the SPP Integrated Marketplace for any speculative trading activities. OG&E records SPP Integrated Marketplace transactions as sales or purchases per FERC Order 668, which requires that purchases and sales be recorded on a net basis for each settlement period of the SPP Integrated Marketplace. These results are reported as Operating Revenues or Cost of Goods Sold in its Financial Statements. OG&E revenues, expenses, assets and liabilities may be adversely affected by changes in the organization, operating and regulation by the FERC or the SPP. | ||||||||
Fuel Adjustment Clauses, Policy [Policy Text Block] | Fuel Adjustment Clauses | |||||||
The actual cost of fuel used in electric generation and certain purchased power costs are passed through to OG&E's customers through fuel adjustment clauses. The fuel adjustment clauses are subject to periodic review by the OCC, the APSC and the FERC. The OCC, the APSC and the FERC have authority to review the appropriateness of gas transportation charges or other fees OG&E pays to its affiliate, Enable. | ||||||||
Income Taxes, Policy [Policy Text Block] | Income Taxes | |||||||
OG&E is a member of an affiliated group that files consolidated income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. Income taxes are generally allocated to each company in the affiliated group based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and are being amortized to income over the life of the related property. OG&E uses the asset and liability method of accounting for income taxes. Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carry forwards and net operating loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change. OG&E recognizes interest related to unrecognized tax benefits in interest expense and recognizes penalties in other expense. | ||||||||
Accrued Vacation, Policy [Policy Text Block] | Accrued Vacation | |||||||
OG&E accrues vacation pay monthly by establishing a liability for vacation earned. Vacation may be taken as earned and is charged against the liability. At the end of each year, the liability represents the amount of vacation earned, but not taken. | ||||||||
Environmental Costs, Policy [Policy Text Block] | Environmental Costs | |||||||
Accruals for environmental costs are recognized when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are charged to expense or deferred as a regulatory asset based on expected recovery from customers in future rates, if they relate to the remediation of conditions caused by past operations or if they are not expected to mitigate or prevent contamination from future operations. Where environmental expenditures relate to facilities currently in use, such as pollution control equipment, the costs may be capitalized and depreciated over the future service periods. Estimated remediation costs are recorded at undiscounted amounts, independent of any insurance or rate recovery, based on prior experience, assessments and current technology. Accrued obligations are regularly adjusted as environmental assessments and estimates are revised, and remediation efforts proceed. For sites where OG&E has been designated as one of several potentially responsible parties, the amount accrued represents OG&E's estimated share of the cost. OG&E had $7.5 million and $6.2 million in accrued environmental liabilities at December 31, 2014 and 2013, respectively, which are included in the asset retirement obligations table. | ||||||||
Related Party Transactions [Policy Text Block] | OGE Energy charges operating costs to OG&E based on several factors. Operating costs directly related to OG&E are assigned as such. Operating costs incurred for the benefit of OG&E are allocated either as overhead based primarily on labor costs or using the "Distrigas" method. | |||||||
Fair Value of Financial Instruments, Policy [Policy Text Block] | Fair Value Measurements | |||||||
The classification of OG&E's fair value measurements requires judgment regarding the degree to which market data are observable or corroborated by observable market data. GAAP establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to quoted prices in active markets for identical unrestricted assets or liabilities (Level 1) and the lowest priority given to unobservable inputs (Level 3). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The three levels defined in the fair value hierarchy are as follows: | ||||||||
Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date. | ||||||||
Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. | ||||||||
Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). | ||||||||
The carrying value of the financial instruments included in the Balance Sheets approximates fair value except for long-term debt which is valued at the carrying amount. The fair value of OG&E's long-term debt is based on quoted market prices and estimates of current rates available for similar issues with similar maturities and is classified as Level 2 in the fair value hierarchy. | ||||||||
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] | Restricted Stock | |||||||
Under the Stock Incentive Plan and beginning in 2008, OGE Energy issued restricted stock to certain existing non-officer employees as well as other executives upon hire to attract and retain individuals to be competitive in the marketplace. The restricted stock vests in one-third annual increments. Prior to vesting, each share of restricted stock is subject to forfeiture if the recipient ceases to render substantial services to OGE Energy or a subsidiary for any reason other than death, disability or retirement. These shares may not be sold, assigned, transferred or pledged and are subject to a risk of forfeiture. | ||||||||
The fair value of the restricted stock was based on the closing market price of OGE Energy's common stock on the grant date. Compensation expense for the restricted stock is a fixed amount determined at the grant date fair value and is recognized as services are rendered by employees over a three-year vesting period. Also, OG&E treats its restricted stock as multiple separate awards by recording compensation expense separately for each tranche whereby a substantial portion of the expense is recognized in the earlier years in the requisite service period. Dividends are accrued and paid during the vesting period on all restricted stock awards prior to July 2014, and therefore included in the fair value calculation. For all awards after July 2014, dividends will only be paid on any restricted stock awards that vest, accordingly dividends are no longer included in the fair value calculations. The expected life of the restricted stock is based on the non-vested period since inception of the three-year award cycle. There are no post-vesting restrictions related to OGE Energy's restricted stock. | ||||||||
Performance Units | ||||||||
Under the Stock Incentive Plan, OGE Energy has issued performance units which represent the value of one share of OGE Energy's common stock. The performance units provide for accelerated vesting if there is a change in control (as defined in the Stock Incentive Plan). Each performance unit is subject to forfeiture if the recipient terminates employment with OGE Energy or a subsidiary prior to the end of the three-year award cycle for any reason other than death, disability or retirement. In the event of death, disability or retirement, a participant will receive a prorated payment based on such participant's number of full months of service during the award cycle, further adjusted based on the achievement of the performance goals during the award cycle. | ||||||||
The performance units granted based on total shareholder return are contingently awarded and will be payable in shares of OGE Energy's common stock subject to the condition that the number of performance units, if any, earned by the employees upon the expiration of a three-year award cycle (i.e., three-year cliff vesting period) is dependent on OGE Energy's total shareholder return ranking relative to a peer group of companies. The performance units granted based on earnings per share are contingently awarded and will be payable in shares of OGE Energy's common stock based on OGE Energy's earnings per share growth over a three-year award cycle (i.e., three-year cliff vesting period) compared to a target set at the time of the grant by the Compensation Committee of OGE Energy's Board of Directors. All of these performance units are classified as equity in OGE Energy's Consolidated Balance Sheet. If there is no or only a partial payout for the performance units at the end of the award cycle, the unearned performance units are cancelled. Payout requires approval of the Compensation Committee of OGE Energy's Board of Directors. Payouts, if any, are all made in common stock and are considered made when the payout is approved by the Compensation Committee. | ||||||||
Stock Options | ||||||||
OGE Energy last issued stock options in 2004 and as of December 31, 2006, all stock options were fully vested and expensed. All stock options had a contractual life of 10 years. | ||||||||
Performance Units – Earnings Per Share | ||||||||
The fair value of the performance units based on earnings per share is based on grant date fair value which is equivalent to the price of one share of OGE Energy's common stock on the date of grant. The fair value of performance units based on earnings per share varies as the number of performance units that will vest is based on the grant date fair value of the units and the probable outcome of the performance condition. OGE Energy reassesses at each reporting date whether achievement of the performance condition is probable and accrues compensation expense if and when achievement of the performance condition is probable. As a result, the compensation expense recognized for these performance units can vary from period to period. There are no post-vesting restrictions related to OGE Energy's performance units based on earnings per share. | ||||||||
Performance Units – Total Shareholder Return | ||||||||
The fair value of the performance units based on total shareholder return was estimated on the grant date using a lattice-based valuation model that factors in information, including the expected dividend yield, expected price volatility, risk-free interest rate and the probable outcome of the market condition, over the expected life of the performance units. Compensation expense for the performance units is a fixed amount determined at the grant date fair value and is recognized over the three-year award cycle regardless of whether performance units are awarded at the end of the award cycle. Dividends were not accrued or paid for awards prior to February 2014, and were therefore not included in the fair value calculation. Beginning with the February 2014 performance unit awards, dividends are accrued on a quarterly basis pending achievement of payout criteria, and were therefore included in the fair value calculations. Expected price volatility is based on the historical volatility of OGE Energy's common stock for the past three years and was simulated using the Geometric Brownian Motion process. The risk-free interest rate for the performance unit grants is based on the three-year U.S. Treasury yield curve in effect at the time of the grant. The expected life of the units is based on the non-vested period since inception of the award cycle. There are no post-vesting restrictions related to OGE Energy's performance units based on total shareholder return. | ||||||||
Pension and Other Postretirement Plans, Policy [Policy Text Block] | OGE Energy provides a Restoration of Retirement Income Plan to those participants in OGE Energy's Pension Plan whose benefits are subject to certain limitations of the Code. Participants in the Restoration of Retirement Income Plan receive the same benefits that they would have received under OGE Energy's Pension Plan in the absence of limitations imposed by the Federal tax laws. The Restoration of Retirement Income Plan is intended to be an unfunded plan. | |||||||
The three levels defined in the fair value hierarchy and examples of each are as follows: | ||||||||
Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible by the Pension Plan at the measurement date. Instruments classified as Level 1 include investments in common and preferred stocks, U.S. treasury notes and bonds, mutual funds and interest-bearing cash. | ||||||||
Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Instruments classified as Level 2 include corporate fixed income and other securities, mortgage-backed securities, other U.S. Government obligations, commingled fund, a common/collective trust, U.S. municipal bonds, foreign government bonds, a repurchase agreement, money market fund and forward contracts. | ||||||||
Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the Plan's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). | ||||||||
Post-Employment Benefit Plan | ||||||||
Postretirement Benefit Plans | ||||||||
In addition to providing pension benefits, OGE Energy provides certain medical and life insurance benefits for eligible retired members. Regular, full-time, active employees hired prior to February 1, 2000 whose age and years of credited service total or exceed 80 or have attained at least age 55 with 10 or more years of service at the time of retirement are entitled to postretirement medical benefits while employees hired on or after February 1, 2000 are not entitled to postretirement medical benefits. Eligible retirees must contribute such amount as OGE Energy specifies from time to time toward the cost of coverage for postretirement benefits. The benefits are subject to deductibles, co-payment provisions and other limitations. OG&E charges to expense the postretirement benefit costs and includes an annual amount as a component of the cost-of-service in future ratemaking proceedings. | ||||||||
Pension Plan and Restoration of Retirement Income Plan | ||||||||
OG&E's employees participate in OGE Energy's Pension Plan and Restoration of Retirement Income Plan. | ||||||||
It is OGE Energy's policy to fund the Pension Plan on a current basis based on the net periodic pension expense as determined by OGE Energy's actuarial consultants. During 2013, OGE Energy made contributions to its Pension Plan of $35 million of which none was OG&E's portion. to help ensure that the Pension Plan maintains an adequate funded status. Such contributions are intended to provide not only for benefits attributed to service to date, but also for those expected to be earned in the future. During 2014, OGE Energy did not make any contributions to its Pension Plan. OGE Energy has not yet determined whether it will need to make any contributions to the Pension Plan in 2015. Any contribution to the Pension Plan during 2015 would be a discretionary contribution, anticipated to be in the form of cash, and is not required to satisfy the minimum regulatory funding requirement specified by the Employee Retirement Income Security Act of 1974, as amended. OGE Energy could be required to make additional contributions if the value of its pension trust and postretirement benefit plan trust assets are adversely impacted by a major market disruption in the future. | ||||||||
In accordance with ASC Topic 715, "Compensation - Retirement Benefits," a one-time settlement charge is required to be recorded by an organization when lump sum payments or other settlements that relieve the organization from the responsibility for the pension benefit obligation during a plan year exceed the service cost and interest cost components of the organization’s net periodic pension cost. During 2013, OG&E experienced an increase in both the number of employees electing to retire and the amount of lump sum payments to be paid to such employees upon retirement. As a result, and based in part on OG&E's historical experience regarding eligible employees who elect to retire in the last quarter of a particular year, OG&E recorded pension settlement charges of $17.6 million in the fourth quarter of 2013, of which $17.0 million related to OG&E’s Oklahoma jurisdiction and has been included in the pension tracker. The pension settlement charge did not require a cash outlay by OG&E and did not increase OG&E’s total pension expense over time, as the charges were an acceleration of costs that otherwise would be recognized as pension expense in future periods. | ||||||||
Plan Investments, Policies and Strategies, Policy [Policy Text Block] | Plan Investments, Policies and Strategies | |||||||
The Pension Plan assets are held in a trust which follows an investment policy and strategy designed to reduce the funded status volatility of the Plan by utilizing liability driven investing. The purpose of liability driven investing is to structure the asset portfolio to more closely resemble the pension liability and thereby more effectively hedge against changes in the liability. The investment policy follows a glide path approach that shifts a higher portfolio weighting to fixed income as the Plan's funded status increases. The table below sets forth the targeted fixed income and equity allocations at different funded status levels. | ||||||||
Projected Benefit Obligation Funded Status Thresholds | <90% | 95% | 100% | 105% | 110% | 115% | 120% | |
Fixed income | 50% | 58% | 65% | 73% | 80% | 85% | 90% | |
Equity | 50% | 42% | 35% | 27% | 20% | 15% | 10% | |
Total | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |
Within the portfolio's overall allocation to equities, the funds are allocated according to the guidelines in the table below. | ||||||||
Asset Class | Target Allocation | Minimum | Maximum | |||||
Domestic All-Cap/Large Cap Equity | 50% | 50% | 60% | |||||
Domestic Mid-Cap Equity | 15% | 5% | 25% | |||||
Domestic Small-Cap Equity | 15% | 5% | 25% | |||||
International Equity | 20% | 10% | 30% | |||||
OGE Energy has retained an investment consultant responsible for the general investment oversight, analysis, monitoring investment guideline compliance and providing quarterly reports to certain of OG&E's members and OGE Energy's Investment Committee. The various investment managers used by the trust operate within the general operating objectives as established in the investment policy and within the specific guidelines established for each investment manager's respective portfolio. | ||||||||
The portfolio is rebalanced at least on an annual basis to bring the asset allocations of various managers in line with the target asset allocation listed above. More frequent rebalancing may occur if there are dramatic price movements in the financial markets which may cause the trust's exposure to any asset class to exceed or fall below the established allowable guidelines. | ||||||||
To evaluate the progress of the portfolio, investment performance is reviewed quarterly. It is, however, expected that performance goals will be met over a full market cycle, normally defined as a three to five year period. Analysis of performance is within the context of the prevailing investment environment and the advisors' investment style. The goal of the trust is to provide a rate of return consistently from three percent to five percent over the rate of inflation (as measured by the national Consumer Price Index) on a fee adjusted basis over a typical market cycle of no less than three years and no more than five years. Each investment manager is expected to outperform its respective benchmark. Below is a list of each asset class utilized with appropriate comparative benchmark(s) each manager is evaluated against: | ||||||||
Asset Class | Comparative Benchmark(s) | |||||||
Core Fixed Income | Barclays Capital Aggregate Index | |||||||
Interest Rate Sensitive Fixed Income | Barclays Capital Aggregate Index | |||||||
Long Duration Fixed Income | Barclays Long Government/Credit | |||||||
Equity Index | Standard & Poor's 500 Index | |||||||
All-Cap Equity | Russell 3000 Index | |||||||
Russell 3000 Value Index | ||||||||
Mid-Cap Equity | Russell Midcap Index | |||||||
Russell Midcap Value Index | ||||||||
Small-Cap Equity | Russell 2000 Index | |||||||
Russell 2000 Value Index | ||||||||
International Equity | Morgan Stanley Capital Investment ACWI ex-US | |||||||
The fixed income managers are expected to use discretion over the asset mix of the trust assets in its efforts to maximize risk-adjusted performance. Exposure to any single issuer, other than the U.S. government, its agencies, or its instrumentalities (which have no limits) is limited to five percent of the fixed income portfolio as measured by market value. At least 75 percent of the invested assets must possess an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings. The portfolio may invest up to 10 percent of the portfolio's market value in convertible bonds as long as the securities purchased meet the quality guidelines. A portfolio may invest up to 25 percent of the portfolio's market value in private placement, including 144A securities with or without registration rights and allow for futures to be traded in the portfolio. The purchase of any of OGE Energy's equity, debt or other securities is prohibited. | ||||||||
The domestic value equity managers focus on stocks that the manager believes are undervalued in price and earn an average or less than average return on assets, and often pays out higher than average dividend payments. The domestic growth equity manager will invest primarily in growth companies which consistently experience above average growth in earnings and sales, earn a high return on assets, and reinvest cash flow into existing business. The domestic mid-cap equity portfolio manager focuses on companies with market capitalizations lower than the average company traded on the public exchanges with the following characteristics: price/earnings ratio at or near the Russell Midcap Index, small dividend yield, return on equity at or near the Russell Midcap Index and an earnings per share growth rate at or near the Russell Midcap Index. The domestic small-cap equity manager will purchase shares of companies with market capitalizations lower than the average company traded on the public exchanges with the following characteristics: price/earnings ratio at or near the Russell 2000, small dividend yield, return on equity at or near the Russell 2000 and an earnings per share growth rate at or near the Russell 2000. The international global equity manager invests primarily in non-dollar denominated equity securities. Investing internationally diversifies the overall trust across the global equity markets. The manager is required to operate under certain restrictions including: regional constraints, diversification requirements and percentage of U.S. securities. The Morgan Stanley Capital International All Country World ex-US Index is the benchmark for comparative performance purposes. The Morgan Stanley Capital International All Country World ex-US Index is a market value weighted index designed to measure the combined equity market performance of developed and emerging markets countries, excluding the United States. All of the equities which are purchased for the international portfolio are thoroughly researched. Only companies with a market capitalization in excess of $100 million are allowable. No more than five percent of the portfolio can be invested in any one stock at the time of purchase. All securities are freely traded on a recognized stock exchange and there are no over-the-counter derivatives. The following investment categories are excluded: options (other than traded currency options), commodities, futures (other than currency futures or currency hedging), short sales/margin purchases, private placements, unlisted securities and real estate (but not real estate shares). | ||||||||
For all domestic equity investment managers, no more than eight percent (five percent for mid-cap and small-cap equity managers) can be invested in any one stock at the time of purchase and no more than 16 percent (10 percent for mid-cap and small-cap equity managers) after accounting for price appreciation. Options or financial futures may not be purchased unless prior approval of OGE Energy's Investment Committee is received. The purchase of securities on margin is prohibited as is securities lending. Private placement or venture capital may not be purchased. All interest and dividend payments must be swept on a daily basis into a short-term money market fund for re-deployment. The purchase of any of OGE Energy's equity, debt or other securities is prohibited. The purchase of equity or debt issues of the portfolio manager's organization is also prohibited. The aggregate positions in any company may not exceed one percent of the fair market value of its outstanding stock. | ||||||||
Plan Investments | ||||||||
Postemployment Benefit Plans, Policy [Policy Text Block] | Post-Employment Benefit Plan | |||||||
Disabled employees receiving benefits from OGE Energy's Group Long-Term Disability Plan are entitled to continue participating in OGE Energy's Medical Plan along with their dependents. The post-employment benefit obligation represents the actuarial present value of estimated future medical benefits that are attributed to employee service rendered prior to the date as of which such information is presented. The obligation also includes future medical benefits expected to be paid to current employees participating in OGE Energy's Group Long-Term Disability Plan and their dependents, as defined in OGE Energy's Medical Plan. | ||||||||
The post-employment benefit obligation is determined by an actuary on a basis similar to the accumulated postretirement benefit obligation. The estimated future medical benefits are projected to grow with expected future medical cost trend rates and are discounted for interest at the discount rate and for the probability that the participant will discontinue receiving benefits from OGE Energy's Group Long-Term Disability Plan due to death, recovery from disability, or eligibility for retiree medical benefits. OG&E's post-employment benefit obligation was $1.1 million and $1.4 million at December 31, 2014 and 2013, respectively. | ||||||||
Pension and Other Postretirement Plans, Nonpension Benefits, Policy [Policy Text Block] | 401(k) Plan | |||||||
OGE Energy provides a 401(k) Plan. Each regular full-time employee of OGE Energy or a participating affiliate is eligible to participate in the 401(k) Plan immediately. All other employees of OGE Energy or a participating affiliate are eligible to become participants in the 401(k) Plan after completing one year of service as defined in the 401(k) Plan. Participants may contribute each pay period any whole percentage between two percent and 19 percent of their compensation, as defined in the 401(k) Plan, for that pay period. Participants who have attained age 50 before the close of a year are allowed to make additional contributions referred to as "Catch-Up Contributions," subject to certain limitations of the Code. Participants may designate, at their discretion, all or any portion of their contributions as: (i) a before-tax contribution under Section 401(k) of the Code subject to the limitations thereof; or (ii) a contribution made on an after-tax basis. The 401(k) Plan also includes an eligible automatic contribution arrangement and provides for a qualified default investment alternative consistent with the U.S. Department of Labor regulations. Participants may elect, in accordance with the 401(k) Plan procedures, to have his or her future salary deferral rate to be automatically increased annually on a date and in an amount as specified by the participant in such election. For employees hired or rehired on or after December 1, 2009, OGE Energy contributes to the 401(k) Plan, on behalf of each participant, 200 percent of the participant's contributions up to five percent of compensation. | ||||||||
No OGE Energy contributions are made with respect to a participant's Catch-Up Contributions, rollover contributions, or with respect to a participant's contributions based on overtime payments, pay-in-lieu of overtime for exempt personnel, special lump-sum recognition awards and lump-sum merit awards included in compensation for determining the amount of participant contributions. Once made, OGE Energy's contribution may be directed to any available investment option in the 401(k) Plan. OGE Energy match contributions vest over a three-year period. After two years of service, participants become 20 percent vested in their OGE Energy contribution account and become fully vested on completing three years of service. In addition, participants fully vest when they are eligible for normal or early retirement under the Pension Plan, in the event of their termination due to death or permanent disability or upon attainment of age 65 while employed by OGE Energy or its affiliates. OG&E contributed $8.2 million, $7.8 million and $7.6 million in 2014, 2013 and 2012, respectively, to the 401(k) Plan. | ||||||||
Deferred Compensation Plan | ||||||||
OGE Energy provides a nonqualified deferred compensation plan which is intended to be an unfunded plan. The plan's primary purpose is to provide a tax-deferred capital accumulation vehicle for a select group of management, highly compensated employees and non-employee members of the Board of Directors of OGE Energy and to supplement such employees' 401(k) Plan contributions as well as offering this plan to be competitive in the marketplace. | ||||||||
Eligible employees who enroll in the plan have the following deferral options: (i) eligible employees may elect to defer up to a maximum of 70 percent of base salary and 100 percent of annual bonus awards or (ii) eligible employees may elect a deferral percentage of base salary and bonus awards based on the deferral percentage elected for a year under the 401(k) Plan with such deferrals to start when maximum deferrals to the qualified 401(k) Plan have been made because of limitations in that plan. Eligible directors who enroll in the plan may elect to defer up to a maximum of 100 percent of directors' meeting fees and annual retainers. OGE Energy matches employee (but not non-employee director) deferrals to make up for any match lost in the 401(k) Plan because of deferrals to the deferred compensation plan, and to allow for a match that would have been made under the 401(k) Plan on that portion of either the first six percent of total compensation or the first five percent of total compensation, depending on prior participant elections, deferred that exceeds the limits allowed in the 401(k) Plan. Matching credits vest based on years of service, with full vesting after three years or, if earlier, on retirement, disability, death, a change in control of OGE Energy or termination of the plan. Deferrals, plus any OGE Energy match, are credited to a recordkeeping account in the participant's name. Earnings on the deferrals are indexed to the assumed investment funds selected by the participant. In 2014, those investment options included an OGE Energy Common Stock fund, whose value was determined based on the stock price of OGE Energy's Common Stock. | ||||||||
Supplemental Executive Retirement Plan | ||||||||
OGE Energy provides a supplemental executive retirement plan in order to attract and retain lateral hires or other executives designated by the Compensation Committee of OGE Energy's Board of Directors who may not otherwise qualify for a sufficient level of benefits under OGE Energy's Pension Plan and Restoration of Retirement Income Plan. The supplemental executive retirement plan is intended to be an unfunded plan and not subject to the benefit limitations of the Code. |
Summary_of_Significant_Account2
Summary of Significant Accounting Policies (Tables) | 12 Months Ended | |||||||||||
Dec. 31, 2014 | ||||||||||||
Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||||||||||
Schedule of Regulatory Assets and Liabilities [Table Text Block] | The following table is a summary of OG&E's regulatory assets and liabilities at: | |||||||||||
December 31 (In millions) | 2014 | 2013 | ||||||||||
Regulatory Assets | ||||||||||||
Current | ||||||||||||
Fuel clause under recoveries | $ | 68.3 | $ | 26.2 | ||||||||
Oklahoma demand program rider under recovery (A) | 19.7 | 10.6 | ||||||||||
Crossroads wind farm rider under recovery (A) | — | 4.7 | ||||||||||
Other (A) | 9.1 | 7.3 | ||||||||||
Total Current Regulatory Assets | $ | 97.1 | $ | 48.8 | ||||||||
Non-Current | ||||||||||||
Benefit obligations regulatory asset | $ | 261.1 | $ | 227.4 | ||||||||
Income taxes recoverable from customers, net | 56.1 | 56.5 | ||||||||||
Smart Grid | 43.9 | 44.2 | ||||||||||
Deferred storm expenses | 17.5 | 21.6 | ||||||||||
Unamortized loss on reacquired debt | 16.1 | 11.8 | ||||||||||
Pension tracker | — | 1.4 | ||||||||||
Other | 16.8 | 16.2 | ||||||||||
Total Non-Current Regulatory Assets | $ | 411.5 | $ | 379.1 | ||||||||
Regulatory Liabilities | ||||||||||||
Current | ||||||||||||
Smart Grid rider over recovery (B) | $ | 12.5 | $ | 16.7 | ||||||||
Crossroads wind farm rider over recovery (B) | 10.3 | — | ||||||||||
Other (B) | 1.6 | 3.5 | ||||||||||
Total Current Regulatory Liabilities | $ | 24.4 | $ | 20.2 | ||||||||
Non-Current | ||||||||||||
Accrued removal obligations, net | $ | 248.1 | $ | 227.7 | ||||||||
Pension tracker | 14.9 | — | ||||||||||
Deferred pension credits | — | 6.5 | ||||||||||
Total Non-Current Regulatory Liabilities | $ | 263 | $ | 234.2 | ||||||||
(A) | Included in Other Current Assets on the Balance Sheets. | |||||||||||
(B) | Included in Other Current Liabilities on the Balance Sheets. | |||||||||||
Components of Benefit Obligation Regulatory Asset [Table Text Block] | The following table is a summary of the components of the benefit obligations regulatory asset at: | |||||||||||
December 31 (In millions) | 2014 | 2013 | ||||||||||
Pension Plan and Restoration of Retirement Income Plan | ||||||||||||
Net loss | $ | 196.7 | $ | 178.4 | ||||||||
Prior service cost | 0.6 | 2.5 | ||||||||||
Postretirement Benefit Plans | ||||||||||||
Net loss | 83.6 | 79.9 | ||||||||||
Prior service cost | (19.8 | ) | (33.4 | ) | ||||||||
Total | $ | 261.1 | $ | 227.4 | ||||||||
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] | The following amounts in the benefit obligations regulatory asset at December 31, 2014 are expected to be recognized as components of net periodic benefit cost in 2015: | |||||||||||
(In millions) | ||||||||||||
Pension Plan and Restoration of Retirement Income Plan | ||||||||||||
Net loss | $ | 12.7 | ||||||||||
Prior service cost | 0.5 | |||||||||||
Postretirement Benefit Plans | ||||||||||||
Net loss | 11.8 | |||||||||||
Prior service cost | (13.7 | ) | ||||||||||
Total | $ | 11.3 | ||||||||||
Schedule of Jointly Owned Utility Plants [Table Text Block] | The table below presents OG&E's ownership interest in the jointly-owned McClain Plant and the jointly-owned Redbud Plant, and, as disclosed below, only OG&E's ownership interest is reflected in the property, plant and equipment and accumulated depreciation balances in these tables. The owners of the remaining interests in the McClain Plant and the Redbud Plant are responsible for providing their own financing of capital expenditures. Also, only OG&E's proportionate interests of any direct expenses of the McClain Plant and the Redbud Plant such as fuel, maintenance expense and other operating expenses are included in the applicable financial statement captions in the Statement of Income. | |||||||||||
December 31, 2014 (In millions) | Percentage Ownership | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | ||||||||
McClain Plant (A) | 77 | % | $ | 207.7 | $ | 46.6 | $ | 161.1 | ||||
Redbud Plant (A)(B) | 51 | % | $ | 484.1 | $ | 81.8 | $ | 402.3 | ||||
(A) | Construction work in progress was $0.5 million and $0.4 million for the McClain and Redbud Plants, respectively. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million. | |||||||||||
December 31, 2013 (In millions) | Percentage Ownership | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | ||||||||
McClain Plant (A) | 77 | % | $ | 183.2 | $ | 62.8 | $ | 120.4 | ||||
Redbud Plant (A)(B) | 51 | % | $ | 498.9 | $ | 89.7 | $ | 409.2 | ||||
(A) | Construction work in progress was $0.1 million and $39.5 million for the McClain and Redbud Plants, respectively. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million. | |||||||||||
Property, Plant and Equipment [Table Text Block] | OG&E's property, plant and equipment and related accumulated depreciation are divided into the following major classes at: | |||||||||||
December 31, 2014 (In millions) | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | |||||||||
Distribution assets | $ | 3,559.50 | $ | 1,086.70 | $ | 2,472.80 | ||||||
Electric generation assets (A) | 3,620.10 | 1,345.10 | 2,275.00 | |||||||||
Transmission assets (B) | 2,370.00 | 417.8 | 1,952.20 | |||||||||
Intangible plant | 67.6 | 31.1 | 36.5 | |||||||||
Other property and equipment | 330 | 125 | 205 | |||||||||
Total property, plant and equipment | $ | 9,947.20 | $ | 3,005.70 | $ | 6,941.50 | ||||||
(A) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $0.4 million. | |||||||||||
December 31, 2013 (In millions) | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment | |||||||||
Distribution assets | $ | 3,403.80 | $ | 1,028.20 | $ | 2,375.60 | ||||||
Electric generation assets (A) | 3,551.00 | 1,306.10 | 2,244.90 | |||||||||
Transmission assets (B) | 2,163.70 | 385 | 1,778.70 | |||||||||
Intangible plant | 50.5 | 27.1 | 23.4 | |||||||||
Other property and equipment | 330.2 | 118.2 | 212 | |||||||||
Total property, plant and equipment | $ | 9,499.20 | $ | 2,864.60 | $ | 6,634.60 | ||||||
(A) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million. | |||||||||||
(B) | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $0.3 million. | |||||||||||
Schedule of Change in Asset Retirement Obligation [Table Text Block] | The following table summarizes changes to OG&E's asset retirement obligations during the years ended December 31, 2014 and 2013. | |||||||||||
(In millions) | 2014 | 2013 | ||||||||||
Balance at January 1 | $ | 55.2 | $ | 53.6 | ||||||||
Liabilities settled | (0.8 | ) | — | |||||||||
Accretion expense | 2.5 | 2.3 | ||||||||||
Revisions in estimated cash flows | 1.7 | (0.7 | ) | |||||||||
Balance at December 31 | $ | 58.6 | $ | 55.2 | ||||||||
RelatedParty_Transactions_Tabl
Related-Party Transactions (Tables) | 12 Months Ended | |||||||||
Dec. 31, 2014 | ||||||||||
Related Party Transaction [Line Items] | ||||||||||
Schedule of Related Party Transactions [Table Text Block] | The following table summarizes related party transactions between OG&E and its affiliate, Enable, during 2014, 2013 and 2012. | |||||||||
Year Ended December 31, | ||||||||||
(In millions) | 2014 | 2013 | 2012 | |||||||
Operating Revenues: | ||||||||||
Electricity to power electric compression assets | $ | 13.3 | $ | 10.2 | $ | 12.4 | ||||
Cost of Sales: | ||||||||||
Natural gas transportation services | $ | 34.9 | $ | 34.8 | $ | 34.8 | ||||
Natural gas storage services | 4.4 | 12.9 | 12.9 | |||||||
Natural gas purchases | 8.7 | 22.4 | 20.4 | |||||||
Fair_Value_Measurements_Tables
Fair Value Measurements (Tables) | 12 Months Ended | ||||||||||||
Dec. 31, 2014 | |||||||||||||
Fair Value Disclosures [Abstract] | |||||||||||||
Fair Value, by Balance Sheet Grouping [Table Text Block] | The following table summarizes the fair value and carrying amount of OG&E's financial instruments at December 31, 2014 and December 31, 2013. | ||||||||||||
2014 | 2013 | ||||||||||||
December 31 (In millions) | Carrying Amount | Fair | Carrying Amount | Fair | |||||||||
Value | Value | ||||||||||||
Long-Term Debt | |||||||||||||
Senior Notes | $ | 2,509.70 | $ | 2,957.70 | $ | 2,154.50 | $ | 2,405.00 | |||||
Industrial Authority Bonds | 135.4 | 135.4 | 135.4 | 135.4 | |||||||||
Tinker Debt | 10.2 | 10.3 | 10.3 | 9.1 | |||||||||
StockBased_Compensation_Tables
Stock-Based Compensation (Tables) | 12 Months Ended | |||||||||||||||||
Dec. 31, 2014 | ||||||||||||||||||
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] | The following table summarizes OG&E's pre-tax compensation expense and related income tax benefit for the years ended December 31, 2014, 2013 and 2012 related to performance units and restricted stock for OG&E employees. | |||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||
Performance units | ||||||||||||||||||
Total shareholder return | $ | 2 | $ | 1.7 | $ | 1.7 | ||||||||||||
Earnings per share | 0.8 | 0.5 | 0.9 | |||||||||||||||
Total performance units | 2.8 | 2.2 | 2.6 | |||||||||||||||
Restricted stock | 0.1 | 0.1 | 0.1 | |||||||||||||||
Net compensation expense | $ | 2.9 | $ | 2.3 | $ | 2.7 | ||||||||||||
Income tax benefit | $ | 1.1 | $ | 0.9 | $ | 1.2 | ||||||||||||
Performance Units Total Shareholder Return Valuation Assumptions [Table Text Block] | The number of performance units granted based on total shareholder return and the assumptions used to calculate the grant date fair value of the performance units based on total shareholder return are shown in the following table. | |||||||||||||||||
2014 | 2013 | 2012 | ||||||||||||||||
Number of units granted to OG&E employees | 67,773 | 71,850 | 81,122 | |||||||||||||||
Fair value of units granted | $ | 34.73 | $ | 25.89 | $ | 25.91 | ||||||||||||
Expected dividend yield | 2.5 | % | 2.8 | % | 3 | % | ||||||||||||
Expected price volatility | 20 | % | 20 | % | 22 | % | ||||||||||||
Risk-free interest rate | 0.67 | % | 0.37 | % | 0.38 | % | ||||||||||||
Expected life of units (in years) | 2.88 | 2.84 | 2.87 | |||||||||||||||
Performance Units Earnings Per Share Valuation Assumptions [Table Text Block] | The number of performance units granted based on earnings per share and the grant date fair value are shown in the following table. | |||||||||||||||||
2014 | 2013 | 2012 | ||||||||||||||||
Number of units granted to OG&E employees | 22,592 | 23,952 | 27,038 | |||||||||||||||
Fair value of units granted | $ | 34.74 | $ | 26.73 | $ | 23.82 | ||||||||||||
Restricted Stock Valuation Assumptions [Table Text Block] | The number of shares of restricted stock granted related to OG&E employees and the grant date fair value are shown in the following table. | |||||||||||||||||
2014 | 2013 | 2012 | ||||||||||||||||
Shares of restricted stock granted to OG&E employees | 6,204 | 3,824 | 2,216 | |||||||||||||||
Fair value of restricted stock granted | $ | 35.66 | $ | 29.71 | $ | 26.93 | ||||||||||||
Schedule of Share-based Compensation, Activity [Table Text Block] | A summary of the activity for OGE Energy's performance units and restricted stock applicable to OG&E's employees at December 31, 2014 and changes in 2014 are shown in the following table. | |||||||||||||||||
Performance Units | ||||||||||||||||||
Total Shareholder Return | Earnings Per Share | Restricted Stock | ||||||||||||||||
(dollars in millions) | Number | Aggregate Intrinsic Value | Number | Aggregate Intrinsic Value | Number | Aggregate Intrinsic Value | ||||||||||||
of Units | of Units | of Shares | ||||||||||||||||
Units/Shares Outstanding at 12/31/13 | 206,826 | 68,938 | 5,948 | |||||||||||||||
Granted | 67,773 | (A) | 22,592 | (A) | 6,204 | |||||||||||||
Converted | (68,750 | ) | (B) | $ | 3.7 | (22,914 | ) | (B) | $ | 1.6 | N/A | |||||||
Vested | N/A | N/A | (2,954 | ) | $ | 0.1 | ||||||||||||
Forfeited | (1,494 | ) | (496 | ) | — | |||||||||||||
Employee migration | 7,925 | (C) | 2,643 | (C) | — | |||||||||||||
Units/Shares Outstanding at 12/31/14 | 212,280 | $ | — | 70,763 | $ | 1.7 | 9,198 | $ | 0.3 | |||||||||
Units/Shares Fully Vested at 12/31/14 | 73,020 | $ | — | 24,339 | $ | 1 | ||||||||||||
(A) | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target. | |||||||||||||||||
(B) | These amounts represent performance units that vested at December 31, 2013 which were settled in February 2014. | |||||||||||||||||
(C) | Due to certain employees transferring between OG&E and its affiliates. | |||||||||||||||||
Schedule of Nonvested Share Activity [Table Text Block] | A summary of the activity for OGE Energy's non-vested performance units and restricted stock applicable to OG&E's employees at December 31, 2014 and changes in 2014 are shown in the following table. | |||||||||||||||||
Performance Units | ||||||||||||||||||
Total Shareholder Return | Earnings Per Share | Restricted Stock | ||||||||||||||||
Number | Weighted-Average | Number | Weighted-Average | Number | Weighted-Average | |||||||||||||
of Units | Grant Date | of Units | Grant Date | of Shares | Grant Date | |||||||||||||
Fair Value | Fair Value | Fair Value | ||||||||||||||||
Units/Shares Non-Vested at 12/31/13 | 138,076 | $ | 25.9 | 46,024 | $ | 25.25 | 5,948 | $ | 27.91 | |||||||||
Granted | 67,773 | (A) | $ | 34.73 | 22,592 | (A) | $ | 34.74 | 6,204 | $ | 35.66 | |||||||
Vested | (73,020 | ) | $ | 25.91 | (24,339 | ) | $ | 23.82 | (2,954 | ) | $ | 26.65 | ||||||
Forfeited | (1,494 | ) | $ | 28.01 | (496 | ) | $ | 27.08 | — | $ | — | |||||||
Employee migration | 7,925 | (B) | $ | 27.2 | 2,643 | (B) | $ | 26.5 | — | $ | — | |||||||
Units/Shares Non-Vested at 12/31/14 | 139,260 | $ | 30.24 | 46,424 | $ | 30.67 | 9,198 | $ | 33.57 | |||||||||
Units/Shares Expected to Vest | 123,848 | (C) | 41,287 | (C) | 9,198 | |||||||||||||
(A) | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target. | |||||||||||||||||
(B) | Due to certain employees transferring between OG&E and its affiliates. | |||||||||||||||||
(C) | The intrinsic value of the performance units based on total shareholder return and earnings per share is $0.0 million and $1.5 million, respectively. | |||||||||||||||||
Fair Value of Vested Performance Units and Restricted Stock [Table Text Block] | A summary of OG&E's fair value for its vested performance units and restricted stock is shown in the following table. | |||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||
Performance units | ||||||||||||||||||
Total shareholder return | $ | 1.9 | $ | 1.6 | $ | 1.4 | ||||||||||||
Earnings per share | 0.7 | 1 | 0.8 | |||||||||||||||
Restricted stock | 0.1 | 0.1 | 0.1 | |||||||||||||||
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] | A summary of OG&E's unrecognized compensation cost for its non-vested performance units and restricted stock and the weighted-average periods over which the compensation cost is expected to be recognized are shown in the following table. | |||||||||||||||||
December 31, 2014 | Unrecognized Compensation Cost (in millions) | Weighted Average to be Recognized (in years) | ||||||||||||||||
Performance units | ||||||||||||||||||
Total shareholder return | $ | 2.3 | 1.7 | |||||||||||||||
Earnings per share | 0.7 | 1.83 | ||||||||||||||||
Total performance units | 3 | |||||||||||||||||
Restricted stock | 0.2 | 2.54 | ||||||||||||||||
Total | $ | 3.2 | ||||||||||||||||
Exercised Stock Options [Table Text Block] | A summary of the activity for OG&E's exercised stock options in 2013 and 2012 are shown in the following table. | |||||||||||||||||
Year ended December 31 (In millions) | 2013 | 2012 | ||||||||||||||||
Intrinsic value (A) | $ | 0.2 | $ | 0.2 | ||||||||||||||
(A) | The difference between the market value on the date of exercise and the option exercise price. |
Supplemental_Cash_Flow_Informa1
Supplemental Cash Flow Information (Tables) | 12 Months Ended | |||||||||
Dec. 31, 2014 | ||||||||||
Supplemental Cash Flow Information [Abstract] | ||||||||||
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] | The following table discloses information about investing and financing activities that affected recognized assets and liabilities but which did not result in cash receipts or payments. Also disclosed in the table is cash paid for interest, net of interest capitalized, and cash paid for income taxes, net of income tax refunds. | |||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||
NON-CASH INVESTING AND FINANCING ACTIVITIES | ||||||||||
Installment payments for Tinker electric distribution system | $ | — | $ | — | $ | 10.6 | ||||
Power plant long-term service agreement | — | 9.7 | — | |||||||
SUPPLEMENTAL CASH FLOW INFORMATION | ||||||||||
Cash Paid During the Period for | ||||||||||
Interest (net of interest capitalized) (A) | $ | 143.6 | $ | 127.5 | $ | 122.1 | ||||
Income taxes (net of income tax refunds) | 0.2 | (5.5 | ) | (1.2 | ) | |||||
(A) | Net of interest capitalized of $2.4 million, $3.4 million and $3.5 million in 2014, 2013 and 2012, respectively. |
Income_Taxes_Tables
Income Taxes (Tables) | 12 Months Ended | |||||||||
Dec. 31, 2014 | ||||||||||
Income Tax Disclosure [Abstract] | ||||||||||
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] | The items comprising income tax expense are as follows: | |||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||
Provision (Benefit) for Current Income Taxes | ||||||||||
Federal | $ | (43.4 | ) | $ | (3.2 | ) | $ | (9.0 | ) | |
State | (6.3 | ) | 0.6 | 0.3 | ||||||
Total Provision (Benefit) for Current Income Taxes | (49.7 | ) | (2.6 | ) | (8.7 | ) | ||||
Provision for Deferred Income Taxes, net | ||||||||||
Federal | 146.8 | 106.4 | 111.4 | |||||||
State | 15.4 | 11.7 | (5.9 | ) | ||||||
Total Provision for Deferred Income Taxes, net | 162.2 | 118.1 | 105.5 | |||||||
Deferred Federal Investment Tax Credits, net | (0.9 | ) | (2.0 | ) | (2.2 | ) | ||||
Total Income Tax Expense | $ | 111.6 | $ | 113.5 | $ | 94.6 | ||||
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | The following schedule reconciles the statutory tax rates to the effective income tax rate: | |||||||||
Year ended December 31 | 2014 | 2013 | 2012 | |||||||
Statutory Federal tax rate | 35 | % | 35 | % | 35 | % | ||||
Amortization of net unfunded deferred taxes | 0.8 | 0.8 | 1 | |||||||
Federal investment tax credits, net | (0.2 | ) | (0.5 | ) | (0.6 | ) | ||||
State income taxes, net of Federal income tax benefit | 0.8 | — | (0.7 | ) | ||||||
Federal renewable energy credit (A) | (9.4 | ) | (9.2 | ) | (9.4 | ) | ||||
Uncertain tax positions | 0.7 | 2 | — | |||||||
Other | — | (0.2 | ) | (0.1 | ) | |||||
Effective income tax rate | 27.7 | % | 27.9 | % | 25.2 | % | ||||
(A) | Represents credits associated with the production from OG&E's wind farms. | |||||||||
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | The deferred tax provisions are recognized as costs in the ratemaking process by the commissions having jurisdiction over the rates charged by OG&E. The components of Deferred Income Taxes at December 31, 2014 and 2013, respectively, were as follows: | |||||||||
December 31 (In millions) | 2014 | 2013 | ||||||||
Current Deferred Income Tax Assets | ||||||||||
Net operating losses | $ | 153.2 | $ | 168.7 | ||||||
Accrued liabilities | 6 | 9 | ||||||||
Federal tax credits | 8.3 | 8 | ||||||||
Accrued vacation | 2.7 | 2.8 | ||||||||
Uncollectible accounts | 0.6 | 0.7 | ||||||||
Total Current Deferred Income Tax Assets | $ | 170.8 | $ | 189.2 | ||||||
Non-Current Deferred Income Tax Liabilities | ||||||||||
Accelerated depreciation and other property related differences | $ | 1,931.40 | $ | 1,747.00 | ||||||
OG&E pension plan | 77.2 | 84.7 | ||||||||
Regulatory asset | 24.7 | 26 | ||||||||
Income taxes refundable to customers, net | 21.7 | 21.9 | ||||||||
Bond redemption-unamortized costs | 5.3 | 3.6 | ||||||||
Total Non-Current Deferred Income Tax Liabilities | 2,060.30 | 1,883.20 | ||||||||
Non-Current Deferred Income Tax Assets | ||||||||||
Federal tax credits | (137.4 | ) | (101.9 | ) | ||||||
State tax credits | (91.6 | ) | (86.1 | ) | ||||||
Regulatory liabilities | (58.0 | ) | (61.3 | ) | ||||||
Postretirement medical and life insurance benefits | (40.6 | ) | (45.2 | ) | ||||||
Asset retirement obligations | (21.4 | ) | (20.8 | ) | ||||||
Net operating losses | (19.7 | ) | (17.6 | ) | ||||||
Deferred Federal investment tax credits | (0.4 | ) | (0.7 | ) | ||||||
Other | (4.6 | ) | (4.4 | ) | ||||||
Total Non-Current Deferred Income Tax Assets | (373.7 | ) | (338.0 | ) | ||||||
Non-Current Deferred Income Tax Liabilities, net | $ | 1,686.60 | $ | 1,545.20 | ||||||
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | Following is a reconciliation of the OG&E’s total gross unrecognized tax benefits as of the years ended December 31, 2014, 2013, and 2012. | |||||||||
(Millions) | 2014 | 2013 | 2012 | |||||||
Balance at January 1 | $ | 7.8 | $ | — | $ | — | ||||
Tax positions related to current year: | ||||||||||
Additions | 2.7 | 2.7 | — | |||||||
Tax positions related to prior years: | ||||||||||
Additions | — | 5.1 | — | |||||||
Balance at December 31 | $ | 10.5 | $ | 7.8 | $ | — | ||||
Summary of Tax Credit Carryforwards [Table Text Block] | The following table summarizes these carry forwards: | |||||||||
(In millions) | Carry Forward Amount | Deferred Tax Asset | Earliest Expiration Date | |||||||
Net operating losses | ||||||||||
State operating loss | $ | 729 | $ | 26.9 | 2030 | |||||
Federal operating loss | 417.4 | 146 | 2030 | |||||||
Federal tax credits | 145.7 | 145.7 | 2029 | |||||||
State tax credits | ||||||||||
Oklahoma investment tax credits | 104.7 | 68.1 | N/A | |||||||
Oklahoma capital investment board credits | 7.3 | 7.3 | N/A | |||||||
Oklahoma zero emission tax credits | 24.1 | 16.2 | 2020 | |||||||
LongTerm_Debt_Tables
Long-Term Debt (Tables) | 12 Months Ended | ||||||
Dec. 31, 2014 | |||||||
Long-term Debt, Unclassified [Abstract] | |||||||
Schedule of Long-term Debt Instruments [Table Text Block] | OG&E has tax-exempt pollution control bonds with optional redemption provisions that allow the holders to request repayment of the bonds on any business day. The bonds, which can be tendered at the option of the holder during the next 12 months, are as follows: | ||||||
SERIES | DATE DUE | AMOUNT | |||||
(In millions) | |||||||
0.07% | - | 0.20% | Garfield Industrial Authority, January 1, 2025 | $ | 47 | ||
0.07% | - | 0.18% | Muskogee Industrial Authority, January 1, 2025 | 32.4 | |||
0.04% | - | 0.15% | Muskogee Industrial Authority, June 1, 2027 | 56 | |||
Total (redeemable during next 12 months) | $ | 135.4 | |||||
Retirement_Plans_and_Postretir1
Retirement Plans and Postretirement Benefit Plans (Tables) | 12 Months Ended | |||||||||||||||||||||||||||
Dec. 31, 2014 | ||||||||||||||||||||||||||||
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | ||||||||||||||||||||||||||||
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] | The following table presents the status of OG&E's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans for 2014 and 2013. These amounts have been recorded in Accrued Benefit Obligations with the offset recorded as a regulatory asset in OG&E's Balance Sheet as discussed in Note 1. The regulatory asset represents a net periodic benefit cost to be recognized in the Statements of Income in future periods. OG&E's portion of the benefit obligation for OGE Energy's Pension Plan and the Restoration of Retirement Income Plan represents the projected benefit obligation, while the benefit obligation for the postretirement benefit plans represents the accumulated postretirement benefit obligation. The accumulated postretirement benefit obligation for OG&E's Pension Plan and Restoration of Retirement Income Plan differs from the projected benefit obligation in that the former includes no assumption about future compensation levels. The accumulated postretirement benefit obligation for the Pension Plan and the Restoration of Retirement Income Plan at December 31, 2014 was $522.1 million and $2.6 million, respectively. The accumulated postretirement benefit obligation for the Pension Plan and the Restoration of Retirement Income Plan at December 31, 2013 was $483.0 million and $1.9 million, respectively. The details of the funded status of the Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans and the amounts included in the Balance Sheets are as follows: | |||||||||||||||||||||||||||
Pension Plan | Restoration of Retirement | Postretirement | ||||||||||||||||||||||||||
Income Plan | Benefit Plans | |||||||||||||||||||||||||||
December 31 (In millions) | 2014 | 2013 | 2014 | 2013 | 2014 | 2013 | ||||||||||||||||||||||
Change in Benefit Obligation | ||||||||||||||||||||||||||||
Beginning obligations | $ | 503.6 | $ | 574.6 | $ | 2.1 | $ | 2.2 | $ | 202.4 | $ | 236.4 | ||||||||||||||||
Service cost | 9.1 | 11.6 | — | 0.1 | 2 | 2.9 | ||||||||||||||||||||||
Interest cost | 21.4 | 20.4 | 0.1 | 0.1 | 8.8 | 8.1 | ||||||||||||||||||||||
Participants' contributions | — | (49.9 | ) | — | — | 2.7 | 2.5 | |||||||||||||||||||||
Actuarial (gains) losses | 56.3 | (39.8 | ) | 0.6 | (0.2 | ) | 14 | (35.4 | ) | |||||||||||||||||||
Benefits paid | (46.9 | ) | (13.3 | ) | — | (0.1 | ) | (12.3 | ) | (12.1 | ) | |||||||||||||||||
Ending obligations | $ | 543.5 | $ | 503.6 | $ | 2.8 | $ | 2.1 | $ | 217.6 | $ | 202.4 | ||||||||||||||||
Change in Plans' Assets | ||||||||||||||||||||||||||||
Beginning fair value | $ | 516.5 | $ | 519 | $ | — | $ | — | $ | 56.7 | $ | 55.5 | ||||||||||||||||
Actual return on plans' assets | 62.9 | 60.7 | — | — | 1.7 | 3.4 | ||||||||||||||||||||||
Employer contributions | — | — | — | 0.1 | 5.4 | 7.4 | ||||||||||||||||||||||
Participants' contributions | — | (49.9 | ) | — | — | 2.7 | 2.5 | |||||||||||||||||||||
Benefits paid | (46.9 | ) | (13.3 | ) | — | (0.1 | ) | (12.3 | ) | (12.1 | ) | |||||||||||||||||
Ending fair value | $ | 532.5 | $ | 516.5 | $ | — | $ | — | $ | 54.2 | $ | 56.7 | ||||||||||||||||
Funded status at end of year | $ | (11.0 | ) | $ | 12.9 | $ | (2.8 | ) | $ | (2.1 | ) | $ | (163.4 | ) | $ | (145.7 | ) | |||||||||||
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | ||||||||||||||||||||||||||||
Pension Plan | Restoration of Retirement | Postretirement Benefit Plans | ||||||||||||||||||||||||||
Income Plan | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | |||||||||||||||||||
Service cost | $ | 9.1 | $ | 11.6 | $ | 10.9 | $ | — | $ | 0.1 | $ | 0.1 | $ | 2 | $ | 2.9 | $ | 2.7 | ||||||||||
Interest cost | 21.4 | 20.4 | 23.5 | 0.1 | 0.1 | 0.1 | 8.8 | 8.1 | 9.4 | |||||||||||||||||||
Expected return on plan assets | (35.8 | ) | (38.9 | ) | (38.2 | ) | — | — | — | (2.2 | ) | (2.4 | ) | (2.8 | ) | |||||||||||||
Amortization of transition obligation | — | — | — | — | — | — | — | — | 2.5 | |||||||||||||||||||
Amortization of net loss | 11.4 | 20.7 | 19.3 | 0.1 | — | 0.1 | 11 | 18.2 | 17.4 | |||||||||||||||||||
Amortization of unrecognized prior service cost (A) | 1.9 | 1.9 | 2.2 | 0.1 | 0.1 | 0.2 | (13.7 | ) | (13.7 | ) | (13.6 | ) | ||||||||||||||||
Settlement | — | 17.6 | — | — | — | 0.3 | — | — | — | |||||||||||||||||||
Net periodic benefit cost (B) | $ | 8 | $ | 33.3 | $ | 17.7 | $ | 0.3 | $ | 0.3 | $ | 0.8 | $ | 5.9 | $ | 13.1 | $ | 15.6 | ||||||||||
(A) | Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. | |||||||||||||||||||||||||||
(B) | In addition to the $14.2 million, $46.7 million and $34.1 million of net periodic benefit cost recognized in 2014, 2013 and 2012, respectively, OG&E recognized the following: | |||||||||||||||||||||||||||
• | an increase in pension expense in 2014, 2013 and 2012 of $11.2 million, $5.8 million and $8.3 million, respectively, to maintain the allowable amount to be recovered for pension expense in the Oklahoma jurisdiction, which are included in the Pension tracker regulatory asset or liability (see Note 1); | |||||||||||||||||||||||||||
• | an increase in postretirement medical expense in 2014, 2013 and 2012 of $5.2 million, $0.6 million and $0.8 million, respectively, to maintain the allowable amount to be recovered for postretirement medical expense in the Oklahoma jurisdiction which are included in the Pension tracker regulatory asset or liability (see Note 1); and | |||||||||||||||||||||||||||
• | a deferral of pension expense in 2013 of $17.0 million which includes a portion of OGE Energy's pension settlement charge, related to the pension settlement charge of $17.6 million which is included in the Pension tracker regulatory account (see Note 1). | |||||||||||||||||||||||||||
Schedule of Capitalized Pension and Postretirement Cost [Table Text Block] | ||||||||||||||||||||||||||||
(In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||||||||
Capitalized portion of net periodic pension cost | $ | 2.6 | $ | 5 | $ | 6.1 | ||||||||||||||||||||||
Capitalized portion of net periodic postretirement benefit cost | 1.8 | 4 | 5.1 | |||||||||||||||||||||||||
Schedule of Assumptions Used [Table Text Block] | Rate Assumptions | |||||||||||||||||||||||||||
Pension Plan and | Postretirement | |||||||||||||||||||||||||||
Restoration of Retirement Income Plan | Benefit Plans | |||||||||||||||||||||||||||
Year ended December 31 | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | ||||||||||||||||||||||
Discount rate | 3.8 | % | 4.6 | % | 3.7 | % | 3.8 | % | 4.6 | % | 3.6 | % | ||||||||||||||||
Rate of return on plans' assets | 7.5 | % | 8 | % | 8 | % | 4 | % | 4 | % | 4 | % | ||||||||||||||||
Compensation increases | 4.2 | % | 4.2 | % | 4.2 | % | N/A | N/A | N/A | |||||||||||||||||||
Assumed health care cost trend: | ||||||||||||||||||||||||||||
Initial trend | N/A | N/A | N/A | 7.85 | % | 8.35 | % | 8.55 | % | |||||||||||||||||||
Ultimate trend rate | N/A | N/A | N/A | 4.48 | % | 4.48 | % | 4.48 | % | |||||||||||||||||||
Ultimate trend year | N/A | N/A | N/A | 2028 | 2028 | 2028 | ||||||||||||||||||||||
N/A - not applicable | ||||||||||||||||||||||||||||
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] | A one-percentage point change in the assumed health care cost trend rate would have the following effects: | |||||||||||||||||||||||||||
ONE-PERCENTAGE POINT INCREASE | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||||||||
Effect on aggregate of the service and interest cost components | $ | — | $ | — | $ | — | ||||||||||||||||||||||
Effect on accumulated postretirement benefit obligations | 0.1 | 0.1 | 0.1 | |||||||||||||||||||||||||
ONE-PERCENTAGE POINT DECREASE | ||||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||||||||
Effect on aggregate of the service and interest cost components | $ | — | $ | — | $ | 0.1 | ||||||||||||||||||||||
Effect on accumulated postretirement benefit obligations | 0.5 | 0.4 | 0.7 | |||||||||||||||||||||||||
Projected Benefit Obligation Funded Status Thresholds [Table Text Block] | The Pension Plan assets are held in a trust which follows an investment policy and strategy designed to reduce the funded status volatility of the Plan by utilizing liability driven investing. The purpose of liability driven investing is to structure the asset portfolio to more closely resemble the pension liability and thereby more effectively hedge against changes in the liability. The investment policy follows a glide path approach that shifts a higher portfolio weighting to fixed income as the Plan's funded status increases. The table below sets forth the targeted fixed income and equity allocations at different funded status levels. | |||||||||||||||||||||||||||
Projected Benefit Obligation Funded Status Thresholds | <90% | 95% | 100% | 105% | 110% | 115% | 120% | |||||||||||||||||||||
Fixed income | 50% | 58% | 65% | 73% | 80% | 85% | 90% | |||||||||||||||||||||
Equity | 50% | 42% | 35% | 27% | 20% | 15% | 10% | |||||||||||||||||||||
Total | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |||||||||||||||||||||
Pension Plan Equity Asset Allocation Table [Table Text Block] | Within the portfolio's overall allocation to equities, the funds are allocated according to the guidelines in the table below. | |||||||||||||||||||||||||||
Asset Class | Target Allocation | Minimum | Maximum | |||||||||||||||||||||||||
Domestic All-Cap/Large Cap Equity | 50% | 50% | 60% | |||||||||||||||||||||||||
Domestic Mid-Cap Equity | 15% | 5% | 25% | |||||||||||||||||||||||||
Domestic Small-Cap Equity | 15% | 5% | 25% | |||||||||||||||||||||||||
International Equity | 20% | 10% | 30% | |||||||||||||||||||||||||
Schedule of Allocation of Plan Assets [Table Text Block] | The following tables summarize OG&E's portion of OGE Energy's postretirement benefit plans investments that are measured at fair value on a recurring basis at December 31, 2014 and 2013. There were no Level 2 investments held by the postretirement benefit plans at December 31, 2014 and 2013. | |||||||||||||||||||||||||||
(In millions) | December 31, 2014 | Level 1 | Level 3 | |||||||||||||||||||||||||
Group retiree medical insurance contract (A) | $ | 51 | $ | — | $ | 51 | ||||||||||||||||||||||
Mutual funds investment | ||||||||||||||||||||||||||||
U.S. equity investments | 8.5 | 8.5 | — | |||||||||||||||||||||||||
Money market funds investment | 0.1 | 0.1 | — | |||||||||||||||||||||||||
Total Plan investments | $ | 59.6 | $ | 8.6 | $ | 51 | ||||||||||||||||||||||
Plan investments attributable to affiliates | (5.4 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 54.2 | ||||||||||||||||||||||||||
(In millions) | December 31, 2013 | Level 1 | Level 3 | |||||||||||||||||||||||||
Group retiree medical insurance contract (A) | $ | 53.1 | $ | — | $ | 53.1 | ||||||||||||||||||||||
Mutual funds investment | ||||||||||||||||||||||||||||
U.S. equity investments | 7.9 | 7.9 | — | |||||||||||||||||||||||||
Money market funds investment | 0.4 | 0.4 | — | |||||||||||||||||||||||||
Total Plan investments | $ | 61.4 | $ | 8.3 | $ | 53.1 | ||||||||||||||||||||||
Plan investments attributable to affiliates | (4.7 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 56.7 | ||||||||||||||||||||||||||
(A) | This category represents a group retiree medical insurance contract which invests in a pool of common stocks, bonds and money market accounts, of which a significant portion is comprised of mortgage-backed securities. | |||||||||||||||||||||||||||
The following tables summarize OG&E's portion of OGE Energy's Pension Plan's investments that are measured at fair value on a recurring basis at December 31, 2014 and 2013. There were no Level 3 investments held by the Pension Plan at December 31, 2014 and 2013. | ||||||||||||||||||||||||||||
(In millions) | December 31, 2014 | Level 1 | Level 2 | |||||||||||||||||||||||||
Common stocks | ||||||||||||||||||||||||||||
U.S. common stocks | $ | 201.4 | $ | 201.4 | $ | — | ||||||||||||||||||||||
Foreign common stocks | 31.3 | 31.3 | — | |||||||||||||||||||||||||
U.S. Government obligations | ||||||||||||||||||||||||||||
U.S. treasury notes and bonds (A) | 203.2 | 203.2 | — | |||||||||||||||||||||||||
Mortgage-backed securities | 20.6 | — | 20.6 | |||||||||||||||||||||||||
Bonds, debentures and notes (B) | ||||||||||||||||||||||||||||
Corporate fixed income and other securities | 167.1 | — | 167.1 | |||||||||||||||||||||||||
Mortgage-backed securities | 19.3 | — | 19.3 | |||||||||||||||||||||||||
Commingled fund (C) | 25.1 | — | 25.1 | |||||||||||||||||||||||||
Common/collective trust (D) | 29.9 | — | 29.9 | |||||||||||||||||||||||||
Foreign government bonds | 7.2 | — | 7.2 | |||||||||||||||||||||||||
U.S. municipal bonds | 3.5 | — | 3.5 | |||||||||||||||||||||||||
Interest-bearing cash | 0.2 | 0.2 | — | |||||||||||||||||||||||||
Preferred stocks (foreign) | 1.2 | 1.2 | — | |||||||||||||||||||||||||
Forward contracts | ||||||||||||||||||||||||||||
Receivable (foreign currency) | 11.3 | — | 11.3 | |||||||||||||||||||||||||
Payable (foreign currency) | (15.6 | ) | — | (15.6 | ) | |||||||||||||||||||||||
Total Plan investments | $ | 705.7 | $ | 437.3 | $ | 268.4 | ||||||||||||||||||||||
Receivable from broker for securities sold | 3.2 | |||||||||||||||||||||||||||
Interest and dividends receivable | 3.9 | |||||||||||||||||||||||||||
Payable to broker for securities purchased | (33.0 | ) | ||||||||||||||||||||||||||
Plan investments attributable to affiliates | (147.3 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 532.5 | ||||||||||||||||||||||||||
(In millions) | December 31, 2013 | Level 1 | Level 2 | |||||||||||||||||||||||||
Common stocks | ||||||||||||||||||||||||||||
U.S. common stocks | $ | 236.8 | $ | 236.8 | $ | — | ||||||||||||||||||||||
Foreign common stocks | 39.3 | 39.3 | — | |||||||||||||||||||||||||
U.S. Government obligations | ||||||||||||||||||||||||||||
U.S. treasury notes and bonds (A) | 159.8 | 159.8 | — | |||||||||||||||||||||||||
Mortgage-backed securities | 50.3 | — | 50.3 | |||||||||||||||||||||||||
Bonds, debentures and notes (B) | ||||||||||||||||||||||||||||
Corporate fixed income and other securities | 110.6 | — | 110.6 | |||||||||||||||||||||||||
Mortgage-backed securities | 22.3 | — | 22.3 | |||||||||||||||||||||||||
Commingled fund (C) | 29.2 | — | 29.2 | |||||||||||||||||||||||||
Common/collective trust (D) | 26 | — | 26 | |||||||||||||||||||||||||
Foreign government bonds | 4 | — | 4 | |||||||||||||||||||||||||
U.S. municipal bonds | 2 | — | 2 | |||||||||||||||||||||||||
Interest-bearing cash | 0.1 | 0.1 | — | |||||||||||||||||||||||||
Forward contracts | ||||||||||||||||||||||||||||
Receivable (foreign currency) | 1.1 | — | 1.1 | |||||||||||||||||||||||||
Payable (foreign currency) | (1.1 | ) | — | (1.1 | ) | |||||||||||||||||||||||
Total Plan investments | $ | 680.4 | $ | 436 | $ | 244.4 | ||||||||||||||||||||||
Receivable from broker for securities sold | 11.5 | |||||||||||||||||||||||||||
Interest and dividends receivable | 3.2 | |||||||||||||||||||||||||||
Payable to broker for securities purchased | (40.2 | ) | ||||||||||||||||||||||||||
Plan investments attributable to affiliates | (138.4 | ) | ||||||||||||||||||||||||||
Total Plan assets | $ | 516.5 | ||||||||||||||||||||||||||
(A) | This category represents U.S. treasury notes and bonds with a Moody's Investors Services rating of Aaa and Government Agency Bonds with a Moody's Investors Services rating of A1 or higher. | |||||||||||||||||||||||||||
(B) | This category primarily represents U.S. corporate bonds with an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings. | |||||||||||||||||||||||||||
(C) | This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets. | |||||||||||||||||||||||||||
(D) | This category represents units of participation in an investment pool which primarily invests in foreign or domestic bonds, debentures, mortgages, equipment or other trust certificates, notes, obligations issued or guaranteed by the U.S. Government or its agencies, bank certificates of deposit, bankers' acceptances and repurchase agreements, high grade commercial paper and other instruments with money market characteristics with a fixed or variable interest rate. There are no restrictions on redemptions in the common/collective trust. | |||||||||||||||||||||||||||
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] | The following table summarizes the postretirement benefit plans investments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3). | |||||||||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | |||||||||||||||||||||||||||
Group retiree medical insurance contract | ||||||||||||||||||||||||||||
Beginning balance | $ | 53.1 | ||||||||||||||||||||||||||
Net unrealized gains related to instruments held at the reporting date | 1.5 | |||||||||||||||||||||||||||
Interest income | 1 | |||||||||||||||||||||||||||
Dividend income | 0.6 | |||||||||||||||||||||||||||
Realized losses | (0.9 | ) | ||||||||||||||||||||||||||
Claims paid | (4.3 | ) | ||||||||||||||||||||||||||
Ending balance | $ | 51 | ||||||||||||||||||||||||||
Schedule of Expected Benefit Payments [Table Text Block] | The Medicare Prescription Drug, Improvement and Modernization Act of 2003 expanded coverage for prescription drugs. The following table summarizes the gross benefit payments OG&E expects to pay related to its postretirement benefit plans, including prescription drug benefits. | |||||||||||||||||||||||||||
Gross Projected | ||||||||||||||||||||||||||||
Postretirement | ||||||||||||||||||||||||||||
Benefit | ||||||||||||||||||||||||||||
(In millions) | Payments | |||||||||||||||||||||||||||
2015 | $ | 12.8 | ||||||||||||||||||||||||||
2016 | 13.1 | |||||||||||||||||||||||||||
2017 | 13.3 | |||||||||||||||||||||||||||
2018 | 13.5 | |||||||||||||||||||||||||||
2019 | 13.7 | |||||||||||||||||||||||||||
After 2019 | 67.6 | |||||||||||||||||||||||||||
The following table summarizes the benefit payments OG&E expects to pay related to its Pension Plan and Restoration of Retirement Income Plan. These expected benefits are based on the same assumptions used to measure OGE Energy's benefit obligation at the end of the year and include benefits attributable to estimated future employee service. | ||||||||||||||||||||||||||||
Projected Benefit Payments | ||||||||||||||||||||||||||||
(In millions) | ||||||||||||||||||||||||||||
2015 | $ | 69.5 | ||||||||||||||||||||||||||
2016 | 63.3 | |||||||||||||||||||||||||||
2017 | 56.7 | |||||||||||||||||||||||||||
2018 | 53.2 | |||||||||||||||||||||||||||
2019 | 49.5 | |||||||||||||||||||||||||||
After 2019 | 177.6 | |||||||||||||||||||||||||||
Commitments_and_Contingencies_
Commitments and Contingencies (Tables) | 12 Months Ended | |||||||||||||||||||||
Dec. 31, 2014 | ||||||||||||||||||||||
Commitments and Contingencies Disclosure [Abstract] | ||||||||||||||||||||||
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] | Operating Lease Obligations | |||||||||||||||||||||
OG&E has operating lease obligations expiring at various dates, primarily for railcar leases and wind farm land leases. Future minimum payments for noncancellable operating leases are as follows: | ||||||||||||||||||||||
Year ended December 31 (In millions) | 2015 | 2016 | 2017 | 2018 | 2019 | After 2019 | Total | |||||||||||||||
Operating lease obligations | ||||||||||||||||||||||
Railcars | $ | 4.5 | $ | 28.7 | $ | 1 | $ | — | $ | — | $ | — | $ | 34.2 | ||||||||
Wind farm land leases | 2.1 | 2.1 | 2.4 | 2.4 | 2.4 | 46.4 | 57.8 | |||||||||||||||
Total operating lease obligations | $ | 6.6 | $ | 30.8 | $ | 3.4 | $ | 2.4 | $ | 2.4 | $ | 46.4 | $ | 92 | ||||||||
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] | Other Purchase Obligations and Commitments | |||||||||||||||||||||
OG&E's other future purchase obligations and commitments estimated for the next five years are as follows: | ||||||||||||||||||||||
(In millions) | 2015 | 2016 | 2017 | 2018 | 2019 | Total | ||||||||||||||||
Other purchase obligations and commitments | ||||||||||||||||||||||
Cogeneration capacity and fixed operation and maintenance payments | $ | 85.2 | $ | 83.3 | $ | 80.7 | $ | 77.8 | $ | 70.6 | $ | 397.6 | ||||||||||
Expected cogeneration energy payments | 74.4 | 78.5 | 81.2 | 89.7 | 85.1 | 408.9 | ||||||||||||||||
Minimum fuel purchase commitments | 389.3 | 246.6 | 43.6 | — | — | 679.5 | ||||||||||||||||
Expected wind purchase commitments | 58.4 | 59.3 | 60.3 | 59.1 | 58.4 | 295.5 | ||||||||||||||||
Long-term service agreement commitments | 2.5 | 2.6 | 2.7 | 19.4 | 27.5 | 54.7 | ||||||||||||||||
Environmental compliance plan expenditures | 66.5 | 138.1 | 117.6 | 50.1 | 3.9 | 376.2 | ||||||||||||||||
Total other purchase obligations and commitments | $ | 676.3 | $ | 608.4 | $ | 386.1 | $ | 296.1 | $ | 245.5 | $ | 2,212.40 | ||||||||||
Schedule of Wind Power Purchases [Table Text Block] | The following table summarizes OG&E's wind power purchases for the years ended December 31, 2014, 2013 and 2012. | |||||||||||||||||||||
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | |||||||||||||||||||
CPV Keenan | $ | 28.1 | $ | 30.9 | $ | 25.1 | ||||||||||||||||
Edison Mission Energy | 21.3 | 20.6 | 20.2 | |||||||||||||||||||
FPL Energy | 3.6 | 3.3 | 3.4 | |||||||||||||||||||
NextEra Energy | 7.8 | 7.2 | 0.8 | |||||||||||||||||||
Total wind power purchased | $ | 60.8 | $ | 62 | $ | 49.5 | ||||||||||||||||
Quarterly_Financial_Data_Table
Quarterly Financial Data (Tables) | 12 Months Ended | ||||||||||||||||
Dec. 31, 2014 | |||||||||||||||||
Quarterly Financial Data [Abstract] | |||||||||||||||||
Schedule of Quarterly Financial Information [Table Text Block] | Due to the seasonal fluctuations and other factors of OG&E's business, the operating results for interim periods are not necessarily indicative of the results that may be expected for the year. In OG&E's opinion, the following quarterly financial data includes all adjustments, consisting of normal recurring adjustments, necessary to fairly present such amounts. Summarized quarterly unaudited financial data is as follows: | ||||||||||||||||
Quarter ended (In millions) | 31-Mar | 30-Jun | 30-Sep | 31-Dec | Total | ||||||||||||
Operating revenues | 2014 | $ | 560.4 | $ | 611.8 | $ | 754.7 | $ | 526.2 | $ | 2,453.10 | ||||||
2013 | $ | 455.5 | $ | 574.6 | $ | 723.2 | $ | 508.9 | $ | 2,262.20 | |||||||
Operating income | 2014 | $ | 61.8 | $ | 142.2 | $ | 248.4 | $ | 85.6 | $ | 538 | ||||||
2013 | $ | 52.9 | $ | 138.1 | $ | 261 | $ | 73.3 | $ | 525.3 | |||||||
Net income | 2014 | $ | 20.7 | $ | 76.9 | $ | 157.3 | $ | 37.1 | $ | 292 | ||||||
2013 | $ | 13 | $ | 79 | $ | 171.5 | $ | 29.1 | $ | 292.6 | |||||||
Schedule_II_Tables
Schedule II (Tables) | 12 Months Ended | ||||||||||||
Dec. 31, 2014 | |||||||||||||
Valuation and Qualifying Accounts Disclosure [Line Items] | |||||||||||||
Schedule II Valuation and Qualifying Accounts [Table Text Block] | SCHEDULE II - Valuation and Qualifying Accounts | ||||||||||||
Additions | |||||||||||||
Description | Balance at Beginning of Period | Charged to Costs and Expenses | Deductions (A) | Balance at End of Period | |||||||||
(In millions) | |||||||||||||
Balance at December 31, 2012 | |||||||||||||
Reserve for Uncollectible Accounts | $ | 3.7 | $ | 3.3 | $ | 4.4 | $ | 2.6 | |||||
Balance at December 31, 2013 | |||||||||||||
Reserve for Uncollectible Accounts | $ | 2.6 | $ | 2.5 | $ | 3.2 | $ | 1.9 | |||||
Balance at December 31, 2014 | |||||||||||||
Reserve for Uncollectible Accounts | $ | 1.9 | $ | 2.3 | $ | 2.6 | $ | 1.6 | |||||
(A) | Uncollectible accounts receivable written off, net of recoveries. |
Summary_of_Significant_Account3
Summary of Significant Accounting Policies Regulated Operations (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | ||
In Millions, unless otherwise specified | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Fuel clause under recoveries | $68.30 | $26.20 | ||
Regulatory Assets, Current | 97.1 | 48.8 | ||
Regulatory Assets, Noncurrent | 411.5 | 379.1 | ||
Regulatory Liability, Current | 24.4 | 20.2 | ||
Regulatory Liability, Noncurrent | 263 | 234.2 | ||
Smart Grid rider over recovery [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Liability, Current | 12.5 | [1] | 16.7 | [1] |
Crossroads Wind Farm Rider Over Recovery [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Liability, Current | 10.3 | [1] | 0 | [1] |
Other Regulatory Liabilities [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Liability, Current | 1.6 | [1] | 3.5 | [1] |
Accrued removal obligations [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Liability, Noncurrent | 248.1 | 227.7 | ||
Pension tracker [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Liability, Noncurrent | 14.9 | 0 | ||
Deferred Pension Credits [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Liability, Noncurrent | 0 | 6.5 | ||
Oklahoma demand program rider under recovery [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Current | 19.7 | [2] | 10.6 | [2] |
Crossroads wind farm rider under recovery [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Current | 0 | [2] | 4.7 | [2] |
Other Regulatory Assets [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Current | 9.1 | [2] | 7.3 | [2] |
Regulatory Assets, Noncurrent | 16.8 | 16.2 | ||
Benefit Obligations [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Noncurrent | 261.1 | 227.4 | ||
Income taxes recoverable from customers, net [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Noncurrent | 56.1 | 56.5 | ||
Smart Grid [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Noncurrent | 43.9 | 44.2 | ||
Deferred storm expenses [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Noncurrent | 17.5 | 21.6 | ||
Unamortized loss on reacquired debt [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Noncurrent | 16.1 | 11.8 | ||
Pension tracker [Member] | ||||
Schedule of Regulatory Assets and Liabilities [Line Items] | ||||
Regulatory Assets, Noncurrent | $0 | $1.40 | ||
[1] | Included in Other Current Liabilities on the Balance Sheets. | |||
[2] | Included in Other Current Assets on the Balance Sheets. |
Summary_of_Significant_Account4
Summary of Significant Accounting Policies Accounting Records (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Components of Benefit Obligation Regulatory Asset | $261.10 | $227.40 |
Deferred Storm and Property Reserve Deficiency, Current | 2.7 | |
Smart Grid Project [Member] | ||
Smart Grid Costs to be Recovered | 6.9 | |
Regulatory Asset [Member] | ||
Components of Net Periodic Benefit Costs to be Recognized in Next Fiscal Year | 11.3 | |
Pension Plans [Member] | Defined Benefit Plans Income Loss [Member] | ||
Components of Benefit Obligation Regulatory Asset | 196.7 | 178.4 |
Components of Net Periodic Benefit Costs to be Recognized in Next Fiscal Year | 12.7 | |
Pension Plans [Member] | Prior Service Cost [Member] | ||
Components of Benefit Obligation Regulatory Asset | 0.6 | 2.5 |
Components of Net Periodic Benefit Costs to be Recognized in Next Fiscal Year | 0.5 | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Defined Benefit Plans Income Loss [Member] | ||
Components of Benefit Obligation Regulatory Asset | 83.6 | 79.9 |
Components of Net Periodic Benefit Costs to be Recognized in Next Fiscal Year | 11.8 | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Prior Service Cost [Member] | ||
Components of Benefit Obligation Regulatory Asset | -19.8 | -33.4 |
Components of Net Periodic Benefit Costs to be Recognized in Next Fiscal Year | ($13.70) |
Summary_of_Significant_Account5
Summary of Significant Accounting Policies Allowance for Uncollectible Accounts Receviable (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Accounts receivable reserve | $1.60 | $1.90 |
Summary_of_Significant_Account6
Summary of Significant Accounting Policies Fuel Inventories (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Fuel inventories | $58.50 | $74.40 |
Other Liabilities, Noncurrent | 85.9 | 81.9 |
Public Utilities, Inventory, Fuel [Member] | ||
Fuel inventories | 66.7 | 74.4 |
Other Liabilities, Noncurrent | 11 | |
Other Assets | 8.2 | |
Enable Gas Transportation and Storage Agreement [Member] | Public Utilities, Inventory, Fuel [Member] | ||
Fuel inventories | $2.70 |
Summary_of_Significant_Account7
Summary of Significant Accounting Policies Property, Plant and Equipment (Details) (USD $) | 12 Months Ended | ||||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | ||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | $9,947.20 | $9,499.20 | |||
Accumulated Depreciation | 3,005.70 | 2,864.60 | |||
Property, Plant and Equipment, Net | 6,941.50 | 6,634.60 | |||
OG&E [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | 9,947.20 | 9,499.20 | |||
Accumulated Depreciation | 3,005.70 | 2,864.60 | |||
Property, Plant and Equipment, Net | 6,941.50 | 6,634.60 | |||
Capitalized Computer Software, Gross | 33.6 | 16.8 | |||
Capitalized Computer Software, Amortization | 5.2 | 4 | 4.2 | ||
Electric Transmission and Distribution Equipment [Member] | OG&E [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | 3,559.50 | 3,403.80 | |||
Accumulated Depreciation | 1,086.70 | 1,028.20 | |||
Property, Plant and Equipment, Net | 2,472.80 | 2,375.60 | |||
Electric Generation Equipment [Member] | OG&E [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | 3,620.10 | [1] | 3,551 | [2] | |
Accumulated Depreciation | 1,345.10 | [1] | 1,306.10 | [2] | |
Property, Plant and Equipment, Net | 2,275 | [1] | 2,244.90 | [2] | |
Amount of Acquisition Adjustments | 148.3 | 148.3 | |||
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation | 34.3 | 28.8 | |||
Electric Transmission [Member] | OG&E [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | 2,370 | [3] | 2,163.70 | [4] | |
Accumulated Depreciation | 417.8 | [3] | 385 | [4] | |
Property, Plant and Equipment, Net | 1,952.20 | [3] | 1,778.70 | [4] | |
Amount of Acquisition Adjustments | 3.3 | 3.3 | |||
Amount of Acquistion Adjustments Related Accumulated Amortization | 0.4 | 0.3 | |||
Finite-Lived Intangible Assets, Major Class Name [Domain] | OG&E [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | 67.6 | 50.5 | |||
Accumulated Depreciation | 31.1 | 27.1 | |||
Property, Plant and Equipment, Net | 36.5 | 23.4 | |||
Property, Plant and Equipment, Other Types [Member] | OG&E [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Property, Plant and Equipment, Gross | 330 | 330.2 | |||
Accumulated Depreciation | 125 | 118.2 | |||
Property, Plant and Equipment, Net | 205 | 212 | |||
McClain Plant [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Jointly Owned Utility Plant, Proportionate Ownership Share | 77.00% | [5] | 77.00% | [6] | |
Property, Plant and Equipment, Gross | 207.7 | [5] | 183.2 | [6] | |
Accumulated Depreciation | 46.6 | [5] | 62.8 | [6] | |
Property, Plant and Equipment, Net | 161.1 | [5] | 120.4 | [6] | |
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress | 0.5 | 0.1 | |||
Redbud Plant [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Jointly Owned Utility Plant, Proportionate Ownership Share | 51.00% | [5],[7] | 51.00% | [6],[8] | |
Property, Plant and Equipment, Gross | 484.1 | [5],[7] | 498.9 | [6],[8] | |
Accumulated Depreciation | 81.8 | [5],[7] | 89.7 | [6],[8] | |
Property, Plant and Equipment, Net | 402.3 | [5],[7] | 409.2 | [6],[8] | |
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress | 0.4 | 39.5 | |||
Amount of Acquisition Adjustments | 148.3 | 148.3 | |||
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation | $34.30 | $28.80 | |||
[1] | This amount includes a plant acquisition adjustment ofB $148.3 million and accumulated amortization ofB $34.3 million. | ||||
[2] | This amount includes a plant acquisition adjustment ofB $148.3 million and accumulated amortization ofB $28.8 million | ||||
[3] | This amount includes a plant acquisition adjustment ofB $3.3 million and accumulated amortization ofB $0.4 million | ||||
[4] | This amount includes a plant acquisition adjustment ofB $3.3 million and accumulated amortization ofB $0.3 million. | ||||
[5] | Construction work in progress was $0.5 million and $0.4 million for the McClain and Redbud Plants, respectively. | ||||
[6] | Construction work in progress was $0.1 million and $39.5 million for the McClain and Redbud Plants, respectively. | ||||
[7] | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million. | ||||
[8] | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million. |
Summary_of_Significant_Account8
Summary of Significant Accounting Policies Depreciation and Amortization (Details) (USD $) | 12 Months Ended | |
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 |
Provision for Depreciation Rate | 2.80% | 2.80% |
Projected Provision for Depreciation in Next Fiscal Year | 2.80% | |
Percent Of Intangible Plant Balance Amortizable | 96.00% | |
Percent of Intangible Plant Balance Amortizable Thereafter | 4.00% | |
Current Fiscal Year End Date | -19 | |
Transmission Equipment [Member] | OG&E [Member] | ||
Amount of Acquisition Adjustments | 3.3 | |
Redbud Plant [Member] | ||
Amount of Acquisition Adjustments | 148.3 | 148.3 |
Summary_of_Significant_Account9
Summary of Significant Accounting Policies Asset Retirement Obligations (Details) (USD $) | 12 Months Ended | |
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||
Balance at January 1 | $55.20 | $53.60 |
Liabilities settled | -0.8 | 0 |
Accretion expense | 2.5 | 2.3 |
Revisions in estimated cash flows | 1.7 | -0.7 |
Balance at December 31 | $58.60 | $55.20 |
Recovered_Sheet1
Summary of Significant Accounting Policies Allowance for Funds Used During Construction (Details) | 12 Months Ended | ||
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | |
Public Utilities, Allowance for Funds Used During Construction, Rate | 6.92% | 8.33% | 8.93% |
Recovered_Sheet2
Summary of Significant Accounting Policies Environmental Costs (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Site Contingency [Line Items] | ||
Accrued Environmental Loss Contingencies, Noncurrent | $7.50 | $6.20 |
RelatedParty_Transactions_Deta
Related-Party Transactions (Details) (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Related Party Transaction [Line Items] | |||
Dividends, Common Stock | $120 | $170 | $75 |
Operating Costs Charged [Member] | Og and E [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 120.3 | 120.1 | 118.4 |
Og and E [Member] | Enable Midstream Partners [Member] | |||
Related Party Transaction [Line Items] | |||
Revenue from Related Parties | 13.3 | 10.2 | |
Og and E [Member] | Enogex [Member] | |||
Related Party Transaction [Line Items] | |||
Revenue from Related Parties | 12.4 | ||
Og and E [Member] | Natural Gas Transportation [Member] | Enable Midstream Partners [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Purchases from Related Party | 34.9 | 34.8 | |
Og and E [Member] | Natural Gas Transportation [Member] | Enogex [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Purchases from Related Party | 34.8 | ||
Og and E [Member] | Natural Gas Storage [Member] | Enable Midstream Partners [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Purchases from Related Party | 4.4 | 12.9 | |
Og and E [Member] | Natural Gas Storage [Member] | Enogex [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Purchases from Related Party | 12.9 | ||
Og and E [Member] | Natural Gas Purchases [Member] | Enable Midstream Partners [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Purchases from Related Party | 8.7 | 22.4 | |
Og and E [Member] | Natural Gas Purchases [Member] | Enogex [Member] | |||
Related Party Transaction [Line Items] | |||
Related Party Transaction, Purchases from Related Party | 20.4 | ||
Retained Earnings [Member] | |||
Related Party Transaction [Line Items] | |||
Dividends, Common Stock | $120 | $170 | $75 |
Fair_Value_Measurements_Recurr
Fair Value Measurements Recurring (Details) (Fair Value, Measurements, Recurring [Member], USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Fair Value, Measurements, Recurring [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Derivative Assets (Liabilities), at Fair Value, Net | $0 | $0 |
Fair_Value_Measurements_Detail
Fair Value Measurements (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
In Millions, unless otherwise specified | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Long-term Debt, Carrying Amount | $2,655.30 | $2,300.20 |
OG&E Senior Notes [Member] | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Long-term Debt, Carrying Amount | 2,509.70 | 2,154.50 |
Long-term Debt, Fair Value | 2,957.70 | 2,405 |
OG&E Industrial Authority Bonds [Member] | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Long-term Debt, Carrying Amount | 135.4 | 135.4 |
Long-term Debt, Fair Value | 135.4 | 135.4 |
OG&E Tinker Debt [Member] | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Long-term Debt, Carrying Amount | 10.2 | 10.3 |
Long-term Debt, Fair Value | $10.30 | $9.10 |
StockBased_Compensation_Detail
Stock-Based Compensation (Details) (USD $) | 12 Months Ended | |||||
In Millions, except Share data, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Number of Shares Authorized | 7,400,000 | |||||
Tax Benefit from Compensation Expense | $1.10 | $0.90 | $1.20 | |||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | ||||||
Minimum payout range | 0.00% | |||||
Maximum payout range | 200.00% | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | ||||||
Total Compensation Cost Not yet Recognized | 3.2 | |||||
Options, Exercises in Period, Total Intrinsic Value | 0.2 | [1] | 0.2 | [1] | ||
Total Shareholder Return [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $34.73 | $25.89 | $25.91 | |||
Expected Dividend Rate | 2.50% | 2.80% | 3.00% | |||
Expected Volatility Rate | 20.00% | 20.00% | 22.00% | |||
Risk Free Interest Rate | 0.67% | 0.37% | 0.38% | |||
Expected Term | 2 years 10 months 17 days | 2 years 10 months 2 days | 2 years 10 months 13 days | |||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | 212,280 | 206,826 | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 67,773 | [2] | 71,850 | 81,122 | ||
Equity Instruments Other than Options, Converted in Period | -68,750 | [3] | ||||
Equity Instruments Other than Options, Vested in Period | -73,020 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | -1,494 | |||||
Equity Other Than Options, Employee Migration | 7,925 | [4] | ||||
Awards Other than Options, Fully Vested, Outstanding | 73,020 | |||||
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value | 3.7 | [3] | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding | 0 | |||||
Equity Instruments Other than Options, Fully Vested, Aggregrate Intrinsic Value | 0 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | ||||||
Equity Instruments Other than Options, Nonvested, Beginning Balance | 138,076 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 67,773 | [2] | 71,850 | 81,122 | ||
Equity Instruments Other than Options, Vested in Period | -73,020 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | -1,494 | |||||
Equity Other Than Options, Employee Migration | 7,925 | [4] | ||||
Equity Instruments Other than Options, Nonvested, Ending Balance | 139,260 | 138,076 | ||||
Awards Other than Options, Vested and Expected to Vest | 123,848 | [5] | ||||
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $30.24 | $25.90 | ||||
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $34.73 | $25.89 | $25.91 | |||
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $25.91 | |||||
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $28.01 | |||||
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value | $27.20 | |||||
Equity Instruments Other than Options, Expected to Vest, Intrinsic Value | 0 | |||||
Fair Value of Vested Performance Units and Restricted Stock | 1.9 | 1.6 | 1.4 | |||
Total Compensation Cost Not yet Recognized | 2.3 | |||||
Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 8 months 12 days | |||||
Performance Units Related to Earnings Per Share [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $34.74 | $26.73 | $23.82 | |||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | 70,763 | 68,938 | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 22,592 | [2] | 23,952 | 27,038 | ||
Equity Instruments Other than Options, Converted in Period | -22,914 | [3] | ||||
Equity Instruments Other than Options, Vested in Period | -24,339 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | -496 | |||||
Equity Other Than Options, Employee Migration | 2,643 | [4] | ||||
Awards Other than Options, Fully Vested, Outstanding | 24,339 | |||||
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value | 1.6 | [3] | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding | 1.7 | |||||
Equity Instruments Other than Options, Fully Vested, Aggregrate Intrinsic Value | 1 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | ||||||
Equity Instruments Other than Options, Nonvested, Beginning Balance | 46,024 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 22,592 | [2] | 23,952 | 27,038 | ||
Equity Instruments Other than Options, Vested in Period | -24,339 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | -496 | |||||
Equity Other Than Options, Employee Migration | 2,643 | [4] | ||||
Equity Instruments Other than Options, Nonvested, Ending Balance | 46,424 | 46,024 | ||||
Awards Other than Options, Vested and Expected to Vest | 41,287 | [5] | ||||
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $30.67 | $25.25 | ||||
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $34.74 | $26.73 | $23.82 | |||
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $23.82 | |||||
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $27.08 | |||||
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value | $26.50 | |||||
Equity Instruments Other than Options, Expected to Vest, Intrinsic Value | 1.5 | |||||
Fair Value of Vested Performance Units and Restricted Stock | 0.7 | 1 | 0.8 | |||
Total Compensation Cost Not yet Recognized | 0.7 | |||||
Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 9 months 29 days | |||||
Performance Shares [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Compensation expense | 2.8 | 2.2 | 2.6 | |||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | ||||||
Total Compensation Cost Not yet Recognized | 3 | |||||
Restricted Stock [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Compensation expense | 0.1 | 0.1 | 0.1 | |||
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $35.66 | |||||
Options, Grants in Period, Weighted Average Grant Date Fair Value | $35.66 | $29.71 | $26.93 | |||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | 9,198 | 5,948 | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 6,204 | 3,824 | 2,216 | |||
Equity Instruments Other than Options, Vested in Period | -2,954 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | 0 | |||||
Equity Other Than Options, Employee Migration | 0 | [4] | ||||
Equity Instruments Other than Options, Vested in Period, Aggregate Intrinsic Value | 0.1 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding | 0.3 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | ||||||
Equity Instruments Other than Options, Nonvested, Beginning Balance | 5,948 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 6,204 | 3,824 | 2,216 | |||
Equity Instruments Other than Options, Vested in Period | -2,954 | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | 0 | |||||
Equity Other Than Options, Employee Migration | 0 | [4] | ||||
Equity Instruments Other than Options, Nonvested, Ending Balance | 9,198 | 5,948 | ||||
Awards Other than Options, Vested and Expected to Vest | 9,198 | |||||
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $33.57 | $27.91 | ||||
Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $35.66 | |||||
Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $26.65 | |||||
Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $0 | |||||
Equity Other Than Options, Employee Migration, Weighted Average Grant Date Fair Value | $0 | |||||
Fair Value of Vested Performance Units and Restricted Stock | 0.1 | 0.1 | 0.1 | |||
Total Compensation Cost Not yet Recognized | 0.2 | |||||
Total Compensation Cost Not yet Recognized, Period for Recognition | 2 years 6 months 15 days | |||||
Stock Compensation Plan [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Compensation expense | 2.9 | 2.3 | 2.7 | |||
Performance Units Related to Earnings Per Share [Member] | Performance Shares [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Compensation expense | 0.8 | 0.5 | 0.9 | |||
Total Shareholder Return [Member] | Performance Shares [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Compensation expense | $2 | $1.70 | $1.70 | |||
Common Stock | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures | 100,640 | 139,706 | 205,838 | |||
Restricted Stock [Member] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Shares Paid for Tax Withholding | 1,076 | |||||
[1] | The difference between the market value on the date of exercise and the option exercise price. | |||||
[2] | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target. | |||||
[3] | These amounts represent performance units that vested at DecemberB 31, 2013 which were settled in February 2014. | |||||
[4] | Due to certain employees transferring between OG&E and its affiliates. | |||||
[5] | The intrinsic value of the performance units based on total shareholder return and earnings per share is $0.0 million and $1.5 million, respectively. |
Supplemental_Cash_Flow_Informa2
Supplemental Cash Flow Information (Details) (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
NON-CASH INVESTING AND FINANCING ACTIVITIES | |||
Installment payments for Tinker electric distribution system | $0 | $0 | $10.60 |
Power plant long-term service agreement | 0 | 9.7 | 0 |
SUPPLEMENTAL CASH FLOW INFORMATION | |||
Interest (net of interest capitalized) | 143.6 | 127.5 | 122.1 |
Income taxes (net of income tax refunds) | 0.2 | -5.5 | -1.2 |
Interest costs capitalized | $2.40 | $3.40 | $3.50 |
Income_Taxes_Details
Income Taxes (Details) (USD $) | 12 Months Ended | ||||||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | |||
Current Federal Tax Expense (Benefit) | ($43.40) | ($3.20) | ($9) | ||||
Current State and Local Tax Expense (Benefit) | -6.3 | 0.6 | 0.3 | ||||
Current Income Tax Expense (Benefit) | -49.7 | -2.6 | -8.7 | ||||
Deferred Federal Income Tax Expense (Benefit) | 146.8 | 106.4 | 111.4 | ||||
Deferred State and Local Income Tax Expense (Benefit) | 15.4 | 11.7 | -5.9 | ||||
Deferred Income Tax Expense (Benefit) | 162.2 | 118.1 | 105.5 | ||||
Investment Tax Credit | -0.9 | -2 | -2.2 | ||||
Income Tax Expense (Benefit) | 111.6 | 113.5 | 94.6 | ||||
Statutory Federal tax rate | 35.00% | 35.00% | 35.00% | ||||
Amortization of net unfunded deferred taxes | 0.80% | 0.80% | 1.00% | ||||
Federal investment tax credits, net | -0.20% | -0.50% | -0.60% | ||||
State income taxes, net of Federal income tax benefit | 0.80% | 0.00% | -0.70% | ||||
Federal renewable energy credit | -9.40% | [1] | -9.20% | [1] | -9.40% | [1] | |
Uncertain tax positions | 0.70% | 2.00% | 0.00% | ||||
Other | 0.00% | -0.20% | -0.10% | ||||
Effective income tax rate | 27.70% | 27.90% | 25.20% | ||||
Net operating losses | 153.2 | 168.7 | |||||
Accrued liabilities | 6 | 9 | |||||
Federal tax credits | 8.3 | 8 | |||||
Accrued vacation | 2.7 | 2.8 | |||||
Uncollectible accounts | 0.6 | 0.7 | |||||
Total Current Deferred Income Tax Assets | 170.8 | 189.2 | |||||
Accelerated depreciation and other property related differences | 1,931.40 | 1,747 | |||||
OG&E pension plan | 77.2 | 84.7 | |||||
Regulatory asset | 24.7 | 26 | |||||
Income taxes refundable to customers, net | 21.7 | 21.9 | |||||
Bond redemption-unamortized costs | 5.3 | 3.6 | |||||
Total Non-Current Deferred Income Tax Liabilities | 2,060.30 | 1,883.20 | |||||
Federal tax credits | -137.4 | -101.9 | |||||
State tax credits | -91.6 | -86.1 | |||||
Regulatory liabilities | -58 | -61.3 | |||||
Postretirement medical and life insurance benefits | -40.6 | -45.2 | |||||
Asset retirement obligations | -21.4 | -20.8 | |||||
Net operating losses | -19.7 | -17.6 | |||||
Deferred Federal investment tax credits | -0.4 | -0.7 | |||||
Other | -4.6 | -4.4 | |||||
Total Non-Current Deferred Income Tax Assets | -373.7 | -338 | |||||
Non-Current Deferred Income Tax Liabilities, net | 1,686.60 | 1,545.20 | |||||
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 10.5 | ||||||
Unrecognized Tax Benefits | 10.5 | 7.8 | 0 | 0 | |||
Current year additions | 2.7 | 2.7 | 0 | ||||
Prior year additions | 0 | 5.1 | 0 | ||||
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 0 | ||||||
Unrecognized Tax Benefits, Period Increase (Decrease) | 2.7 | ||||||
State operating loss [Member] | |||||||
Tax Credit Carryforward, Amount | 729 | ||||||
Tax Credit Carryforward, Deferred Tax Asset | 26.9 | ||||||
Tax Credit Carryforward, Expiration Date | 31-Dec-30 | ||||||
Federal operating loss [Member] | |||||||
Tax Credit Carryforward, Amount | 417.4 | ||||||
Tax Credit Carryforward, Deferred Tax Asset | 146 | ||||||
Tax Credit Carryforward, Expiration Date | 31-Dec-30 | ||||||
Federal tax credits [Member] | |||||||
Tax Credit Carryforward, Amount | 145.7 | ||||||
Tax Credit Carryforward, Deferred Tax Asset | 145.7 | ||||||
Tax Credit Carryforward, Expiration Date | 31-Dec-29 | ||||||
Oklahoma investment tax credits [Member] | |||||||
Tax Credit Carryforward, Amount | 104.7 | ||||||
Tax Credit Carryforward, Deferred Tax Asset | 68.1 | ||||||
Oklahoma capital investment board credits [Member] | |||||||
Tax Credit Carryforward, Amount | 7.3 | ||||||
Tax Credit Carryforward, Deferred Tax Asset | 7.3 | ||||||
Oklahoma zero emission tax credits [Member] | |||||||
Tax Credit Carryforward, Amount | 24.1 | ||||||
Tax Credit Carryforward, Deferred Tax Asset | 16.2 | ||||||
Tax Credit Carryforward, Expiration Date | 31-Dec-20 | ||||||
State and Local Jurisdiction [Member] | |||||||
Unrecognized Tax Benefits, Period Increase (Decrease) | $4.20 | ||||||
[1] | Represents credits associated with the production from OG&E's wind farms. |
Common_Stock_and_Cumulative_Pr1
Common Stock and Cumulative Preferred Stock (Details) | 12 Months Ended | ||
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | |
Stock Issued During Period, Shares, New Issues | 0 | 0 | 0 |
LongTerm_Debt_Details
Long-Term Debt (Details) (USD $) | 12 Months Ended | |
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 |
Debt Instrument [Line Items] | ||
Total long-term debt | $2,655.30 | $2,300.20 |
Percent of Principal Amount Subject to Optional Tender | 100.00% | |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | 0.2 | |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 110.2 | |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 125.1 | |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 250.1 | |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 250.1 | |
Garfield Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument [Line Items] | ||
Date Due | 1-Jan-25 | |
Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument [Line Items] | ||
Date Due | 1-Jan-25 | |
Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] | ||
Debt Instrument [Line Items] | ||
Date Due | 1-Jun-27 | |
Redeemable during the next 12 months [Member] | ||
Debt Instrument [Line Items] | ||
Total long-term debt | 135.4 | |
Redeemable during the next 12 months [Member] | Garfield Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument [Line Items] | ||
Series Minimum | 0.07% | |
Series Maximum | 0.20% | |
Redeemable during the next 12 months [Member] | Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument [Line Items] | ||
Series Minimum | 0.07% | |
Series Maximum | 0.18% | |
Redeemable during the next 12 months [Member] | Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] | ||
Debt Instrument [Line Items] | ||
Series Minimum | 0.04% | |
Series Maximum | 0.15% | |
OG&E [Member] | Redeemable during the next 12 months [Member] | Garfield Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument [Line Items] | ||
Long term debt, gross | 47 | 47 |
OG&E [Member] | Redeemable during the next 12 months [Member] | Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] | ||
Debt Instrument [Line Items] | ||
Long term debt, gross | 32.4 | 32.4 |
OG&E [Member] | Redeemable during the next 12 months [Member] | Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] | ||
Debt Instrument [Line Items] | ||
Long term debt, gross | 56 | 56 |
Senior Notes [Member] | OG&E [Member] | Series due March 15, 2044 [Member] | ||
Debt Instrument [Line Items] | ||
Long term debt, gross | 250 | 0 |
Debt Instrument, Interest Rate, Stated Percentage | 4.55% | |
Date Due | 15-Mar-44 | |
Senior Notes [Member] | OG&E [Member] | Series due December 15, 2044 [Member] | ||
Debt Instrument [Line Items] | ||
Long term debt, gross | 250 | 0 |
Debt Instrument, Interest Rate, Stated Percentage | 4.00% | |
Date Due | 15-Dec-44 | |
Senior Notes [Member] | OG&E [Member] | Series Due August 1, 2034 [Member] | ||
Debt Instrument [Line Items] | ||
Long term debt, gross | 0 | 140 |
Debt Instrument, Interest Rate, Stated Percentage | 6.50% | |
Date Due | 1-Aug-34 | |
Debt Instrument, Repurchased Face Amount | 140 | |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 103.25% | |
Redemption Premium | $4.60 |
ShortTerm_Debt_and_Credit_Faci1
Short-Term Debt and Credit Facility Short-Term Debt and Credit Facility (Details) (USD $) | 12 Months Ended | |
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 |
Line of Credit Facility [Line Items] | ||
Advances to parent | $215.60 | $0 |
Advances from parent | 0 | 87.2 |
OG&E [Member] | ||
Line of Credit Facility [Line Items] | ||
Intercomany Borrowings, Maximum Borrowing Capacity | 400 | |
Intercompany Borrowing Agreement, Expiration Date | 13-Dec-17 | |
Outstanding Intercompany Borrowings | 0 | |
Line of Credit Facility, Maximum Borrowing Capacity | 400 | |
Letters of Credit Outstanding, Amount | 2 | |
Short-term Debt, Weighted Average Interest Rate | 0.95% | |
Line of Credit Facility, Amount Outstanding | 0 | |
Commercial Paper | 0 | |
Short Term Borrowing Capacity That Has Regulatory Approval | 800 | |
Period For Which Regulatory Approval Has Been Given to Acquire Short Term Debt | 2 years | |
December 13, 2017 [Member] | OG&E [Member] | ||
Line of Credit Facility [Line Items] | ||
Line of Credit Facility, Maximum Borrowing Capacity | $8.70 |
Retirement_Plans_and_Postretir2
Retirement Plans and Postretirement Benefit Plans (Details) (USD $) | 12 Months Ended | |||||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | |||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Beginning | $61.40 | |||||
Employer contributions | 0 | 35 | ||||
Fair Value of Plan Assets, Ending | 59.6 | 61.4 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Net Periodic Benefit Cost | 14.2 | 46.7 | 34.1 | |||
Effect of One Percentage Point Increase on Service and Interest Cost Components | 0 | 0 | 0 | |||
Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation | 0.1 | 0.1 | 0.1 | |||
Effect of One Percentage Point Decrease on Service and Interest Cost Components | 0 | 0 | 0.1 | |||
Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation | 0.5 | 0.4 | 0.7 | |||
Fair Value of Plan Assets | 59.6 | 61.4 | ||||
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months | 69.5 | |||||
Defined Benefit Plan, Expected Future Benefit Payments, Year Two | 63.3 | |||||
Defined Benefit Plan, Expected Future Benefit Payments, Year Three | 56.7 | |||||
Defined Benefit Plan, Expected Future Benefit Payments, Year Four | 53.2 | |||||
Defined Benefit Plan, Expected Future Benefit Payments, Year Five | 49.5 | |||||
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | 177.6 | |||||
Defined Contribution Plan, Cost Recognized | 8.2 | 7.8 | 7.6 | |||
Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 8.6 | 8.3 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 8.6 | 8.3 | ||||
Fair Value, Inputs, Level 3 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 51 | 53.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 51 | 53.1 | ||||
Total Plan investments [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 705.7 | 680.4 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 705.7 | 680.4 | ||||
Total Plan investments [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 437.3 | 436 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 437.3 | 436 | ||||
Total Plan investments [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 268.4 | 244.4 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 268.4 | 244.4 | ||||
Restoration of Retirement Income Plan [Member] | ||||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||
Settlements | 0 | 0 | 0.3 | |||
Accumulated Benefit Obligation | 2.6 | 1.9 | ||||
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] | ||||||
Benefit Obligation, Beginning | 2.1 | 2.2 | ||||
Service cost | 0 | 0.1 | 0.1 | |||
Interest cost | 0.1 | 0.1 | 0.1 | |||
Participants' contributions | 0 | 0 | ||||
Actuarial gains (losses) | 0.6 | -0.2 | ||||
Benefits paid | 0 | -0.1 | ||||
Benefit Obligation, Ending | 2.8 | 2.1 | 2.2 | |||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Beginning | 0 | 0 | ||||
Actual return on plans' assets | 0 | 0 | ||||
Employer contributions | 0 | 0.1 | ||||
Participants' contributions | 0 | 0 | ||||
Benefits paid | 0 | -0.1 | ||||
Fair Value of Plan Assets, Ending | 0 | 0 | 0 | |||
Funded Status of Plan | -2.8 | -2.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Service cost | 0 | 0.1 | 0.1 | |||
Interest cost | 0.1 | 0.1 | 0.1 | |||
Expected return on plan assets | 0 | 0 | 0 | |||
Amortization of transition obligation | 0 | 0 | 0 | |||
Amortization of net loss | 0.1 | 0 | 0.1 | |||
Amortization of unrecognized prior service cost | 0.1 | [1] | 0.1 | [1] | 0.2 | [1] |
Settlement | 0 | 0 | -0.3 | |||
Net Periodic Benefit Cost | 0.3 | [2] | 0.3 | [2] | 0.8 | [2] |
Fair Value of Plan Assets | 0 | 0 | 0 | |||
Pension Plans [Member] | ||||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||
Settlements | 0 | 17.6 | 0 | |||
Accumulated Benefit Obligation | 522.1 | 483 | ||||
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] | ||||||
Benefit Obligation, Beginning | 503.6 | 574.6 | ||||
Service cost | 9.1 | 11.6 | 10.9 | |||
Interest cost | 21.4 | 20.4 | 23.5 | |||
Participants' contributions | 0 | -49.9 | ||||
Actuarial gains (losses) | 56.3 | -39.8 | ||||
Benefits paid | -46.9 | -13.3 | ||||
Benefit Obligation, Ending | 543.5 | 503.6 | 574.6 | |||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Beginning | 516.5 | 519 | ||||
Actual return on plans' assets | 62.9 | 60.7 | ||||
Employer contributions | 0 | 0 | ||||
Participants' contributions | 0 | -49.9 | ||||
Benefits paid | -46.9 | -13.3 | ||||
Fair Value of Plan Assets, Ending | 532.5 | 516.5 | 519 | |||
Funded Status of Plan | -11 | 12.9 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Service cost | 9.1 | 11.6 | 10.9 | |||
Interest cost | 21.4 | 20.4 | 23.5 | |||
Expected return on plan assets | -35.8 | -38.9 | -38.2 | |||
Amortization of transition obligation | 0 | 0 | 0 | |||
Amortization of net loss | 11.4 | 20.7 | 19.3 | |||
Amortization of unrecognized prior service cost | 1.9 | [1] | 1.9 | [1] | 2.2 | [1] |
Settlement | 0 | -17.6 | 0 | |||
Net Periodic Benefit Cost | 8 | [2] | 33.3 | [2] | 17.7 | [2] |
Capitalized Portion of Net Periodic Benefit Cost | 2.6 | 5 | 6.1 | |||
Assumptions Used Calculating Benefit Obligation, Discount Rate | 3.80% | 4.60% | 3.70% | |||
Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets | 7.50% | 8.00% | 8.00% | |||
Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase | 4.20% | 4.20% | 4.20% | |||
Fair Value of Plan Assets | 532.5 | 516.5 | 519 | |||
Pension Plans [Member] | OKLAHOMA | ||||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||
Settlements | 17 | |||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Settlement | -17 | |||||
Additional Pension Expense to Meet State Requirements | 11.2 | 5.8 | 8.3 | |||
Pension Plans [Member] | Fair Value, Inputs, Level 3 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | U.S. common stocks [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 201.4 | 236.8 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 201.4 | 236.8 | ||||
Pension Plans [Member] | U.S. common stocks [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 201.4 | 236.8 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 201.4 | 236.8 | ||||
Pension Plans [Member] | U.S. common stocks [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | Foreign common stocks [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 31.3 | 39.3 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 31.3 | 39.3 | ||||
Pension Plans [Member] | Foreign common stocks [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 31.3 | 39.3 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 31.3 | 39.3 | ||||
Pension Plans [Member] | Foreign common stocks [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | U.S. treasury notes and bonds [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 203.2 | [3] | 159.8 | [3] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 203.2 | [3] | 159.8 | [3] | ||
Pension Plans [Member] | U.S. treasury notes and bonds [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 203.2 | [3] | 159.8 | [3] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 203.2 | [3] | 159.8 | [3] | ||
Pension Plans [Member] | U.S. treasury notes and bonds [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | [3] | 0 | [3] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | [3] | 0 | [3] | ||
Pension Plans [Member] | Mortgage-backed Securities [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 20.6 | 50.3 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 20.6 | 50.3 | ||||
Pension Plans [Member] | Mortgage-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | Mortgage-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 20.6 | 50.3 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 20.6 | 50.3 | ||||
Pension Plans [Member] | Corporate fixed income and other securities [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 167.1 | [4] | 110.6 | [4] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 167.1 | [4] | 110.6 | [4] | ||
Pension Plans [Member] | Corporate fixed income and other securities [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | [4] | 0 | [4] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | [4] | 0 | [4] | ||
Pension Plans [Member] | Corporate fixed income and other securities [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 167.1 | [4] | 110.6 | [4] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 167.1 | [4] | 110.6 | [4] | ||
Pension Plans [Member] | Mortgage-backed securities [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 19.3 | [4] | 22.3 | [4] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 19.3 | [4] | 22.3 | [4] | ||
Pension Plans [Member] | Mortgage-backed securities [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | [4] | 0 | [4] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | [4] | 0 | [4] | ||
Pension Plans [Member] | Mortgage-backed securities [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 19.3 | [4] | 22.3 | [4] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 19.3 | [4] | 22.3 | [4] | ||
Pension Plans [Member] | Commingled fund [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 25.1 | [5] | 29.2 | [5] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 25.1 | [5] | 29.2 | [5] | ||
Pension Plans [Member] | Commingled fund [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | [5] | 0 | [5] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | [5] | 0 | [5] | ||
Pension Plans [Member] | Commingled fund [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 25.1 | [5] | 29.2 | [5] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 25.1 | [5] | 29.2 | [5] | ||
Pension Plans [Member] | Common/collective trust [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 29.9 | [6] | 26 | [6] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 29.9 | [6] | 26 | [6] | ||
Pension Plans [Member] | Common/collective trust [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | [6] | 0 | [6] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | [6] | 0 | [6] | ||
Pension Plans [Member] | Common/collective trust [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 29.9 | [6] | 26 | [6] | ||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 29.9 | [6] | 26 | [6] | ||
Pension Plans [Member] | Foreign government bonds [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 7.2 | 4 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 7.2 | 4 | ||||
Pension Plans [Member] | Foreign government bonds [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | Foreign government bonds [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 7.2 | 4 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 7.2 | 4 | ||||
Pension Plans [Member] | U.S. municipal bonds [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 3.5 | 2 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 3.5 | 2 | ||||
Pension Plans [Member] | U.S. municipal bonds [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | U.S. municipal bonds [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 3.5 | 2 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 3.5 | 2 | ||||
Pension Plans [Member] | Interest-bearing cash [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0.2 | 0.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0.2 | 0.1 | ||||
Pension Plans [Member] | Interest-bearing cash [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0.2 | 0.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0.2 | 0.1 | ||||
Pension Plans [Member] | Interest-bearing cash [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | Preferred Stock [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 1.2 | |||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 1.2 | |||||
Pension Plans [Member] | Preferred Stock [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 1.2 | |||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 1.2 | |||||
Pension Plans [Member] | Preferred Stock [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | |||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | |||||
Pension Plans [Member] | Receivable (foreign currency) [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 11.3 | 1.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 11.3 | 1.1 | ||||
Pension Plans [Member] | Receivable (foreign currency) [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | Receivable (foreign currency) [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 11.3 | 1.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 11.3 | 1.1 | ||||
Pension Plans [Member] | Payable (foreign currency) [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | -15.6 | -1.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | -15.6 | -1.1 | ||||
Pension Plans [Member] | Payable (foreign currency) [Member] | Fair Value, Inputs, Level 1 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Pension Plans [Member] | Payable (foreign currency) [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | -15.6 | -1.1 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | -15.6 | -1.1 | ||||
Pension Plans [Member] | Receivable from broker for securities sold [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 3.2 | 11.5 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 3.2 | 11.5 | ||||
Pension Plans [Member] | Interest and dividends receivable [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 3.9 | 3.2 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 3.9 | 3.2 | ||||
Pension Plans [Member] | Payable to broker for securities purchased [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | -33 | -40.2 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | -33 | -40.2 | ||||
Pension Plans [Member] | Plan investments attributable to affiliates [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | -147.3 | -138.4 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | -147.3 | -138.4 | ||||
Pension Plans [Member] | Total Plan assets [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 532.5 | 516.5 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 532.5 | 516.5 | ||||
Other Postretirement Benefit Plans, Defined Benefit [Member] | ||||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||
Settlements | 0 | 0 | 0 | |||
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] | ||||||
Benefit Obligation, Beginning | 202.4 | 236.4 | ||||
Service cost | 2 | 2.9 | 2.7 | |||
Interest cost | 8.8 | 8.1 | 9.4 | |||
Participants' contributions | 2.7 | 2.5 | ||||
Actuarial gains (losses) | 14 | -35.4 | ||||
Benefits paid | -12.3 | -12.1 | ||||
Benefit Obligation, Ending | 217.6 | 202.4 | 236.4 | |||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Beginning | 56.7 | 55.5 | ||||
Actual return on plans' assets | 1.7 | 3.4 | ||||
Employer contributions | 5.4 | 7.4 | ||||
Participants' contributions | 2.7 | 2.5 | ||||
Benefits paid | -12.3 | -12.1 | ||||
Fair Value of Plan Assets, Ending | 54.2 | 56.7 | 55.5 | |||
Funded Status of Plan | -163.4 | -145.7 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Service cost | 2 | 2.9 | 2.7 | |||
Interest cost | 8.8 | 8.1 | 9.4 | |||
Expected return on plan assets | -2.2 | -2.4 | -2.8 | |||
Amortization of transition obligation | 0 | 0 | 2.5 | |||
Amortization of net loss | 11 | 18.2 | 17.4 | |||
Amortization of unrecognized prior service cost | -13.7 | [1] | -13.7 | [1] | -13.6 | [1] |
Settlement | 0 | 0 | 0 | |||
Net Periodic Benefit Cost | 5.9 | [2] | 13.1 | [2] | 15.6 | [2] |
Capitalized Portion of Net Periodic Benefit Cost | 1.8 | 4 | 5.1 | |||
Assumptions Used Calculating Benefit Obligation, Discount Rate | 3.80% | 4.60% | 3.60% | |||
Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets | 4.00% | 4.00% | 4.00% | |||
Health Care Cost Trend Rate Assumed for Next Fiscal Year | 7.85% | 8.35% | 8.55% | |||
Ultimate Health Care Cost Trend Rate | 4.48% | 4.48% | 4.48% | |||
Year that Rate Reaches Ultimate Trend Rate | 2028 | 2028 | 2028 | |||
Fair Value of Plan Assets | 54.2 | 56.7 | 55.5 | |||
Other Postretirement Benefit Plans, Defined Benefit [Member] | OKLAHOMA | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Additional Postretirement Medical Expense to Meet State Requirements | 5.2 | 0.6 | 0.8 | |||
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | ||||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 0 | 0 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | 0 | 0 | ||||
Less Than 90% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 50.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 50.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
95% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 58.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 42.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
100% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 65.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 35.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
105% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 73.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 27.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
110% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 80.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 20.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
115% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 85.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 15.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
120% [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Projected Benefit Obligation Funded Status Thresholds Fixed Income | 90.00% | |||||
Projected Benefit Obligation Funded Status Thresholds Equity | 10.00% | |||||
Projected Benefit Obligation Funded Status Thresholds | 100.00% | |||||
Domestic All-Cap/Large Cap Equity [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Target Plan Asset Allocations | 50.00% | |||||
Target Plan Asset Allocations Range Minimum | 50.00% | |||||
Target Plan Asset Allocations Range Maximum | 60.00% | |||||
Domestic Mid-Cap Equity [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Target Plan Asset Allocations | 15.00% | |||||
Target Plan Asset Allocations Range Minimum | 5.00% | |||||
Target Plan Asset Allocations Range Maximum | 25.00% | |||||
Domestic Small-Cap Equity [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Target Plan Asset Allocations | 15.00% | |||||
Target Plan Asset Allocations Range Minimum | 5.00% | |||||
Target Plan Asset Allocations Range Maximum | 25.00% | |||||
International Equity [Member] | ||||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Target Plan Asset Allocations | 20.00% | |||||
Target Plan Asset Allocations Range Minimum | 10.00% | |||||
Target Plan Asset Allocations Range Maximum | 30.00% | |||||
OG&E [Member] | ||||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||
Pension Contributions | 0 | |||||
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] | ||||||
Fair Value of Plan Assets, Ending | 54.2 | 56.7 | ||||
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] | ||||||
Fair Value of Plan Assets | $54.20 | $56.70 | ||||
[1] | Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment. | |||||
[2] | In addition to the $14.2 million, $46.7 million and $34.1 million of net periodic benefit cost recognized in 2014, 2013 and 2012, respectively, OG&E recognized the following:B b"an increase in pension expense in 2014, 2013 and 2012 of $11.2 million, $5.8 million and $8.3 million, respectively, to maintain the allowable amount to be recovered for pension expense in the Oklahoma jurisdiction, which are included in the Pension tracker regulatory asset or liability (see Note 1);b"an increase in postretirement medical expense in 2014, 2013 and 2012 of $5.2 million, $0.6 million and $0.8 million, respectively, to maintain the allowable amount to be recovered for postretirement medical expense in the Oklahoma jurisdiction which are included in the Pension tracker regulatory asset or liability (see Note 1); andb"a deferral of pension expense in 2013 of $17.0 million which includes a portion of OGE Energy's pension settlement charge, related to the pension settlement charge of $17.6 million which is included in the Pension tracker regulatory account (see Note 1). | |||||
[3] | This category represents U.S. treasury notes and bonds with a Moody's Investors Services rating of Aaa and Government Agency Bonds with a Moody's Investors Services rating of A1 or higher. | |||||
[4] | This category primarily represents U.S. corporate bonds with an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings. | |||||
[5] | This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets. | |||||
[6] | This category represents units of participation in an investment pool which primarily invests in foreign or domestic bonds, debentures, mortgages, equipment or other trust certificates, notes, obligations issued or guaranteed by the U.S. Government or its agencies, bank certificates of deposit, bankers' acceptances and repurchase agreements, high grade commercial paper and other instruments with money market characteristics with a fixed or variable interest rate. There are no restrictions on redemptions in the common/collective trust. |
Retirement_Plans_and_Postretir3
Retirement Plans and Postretirement Benefit Plans Postretirement Benefit Plans (Details) (USD $) | 12 Months Ended | ||||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | ||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | $59.60 | $61.40 | |||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||
Level 3 Asset Value, Beginning of Period | 53.1 | ||||
Unrealized Gains | 1.5 | ||||
Interest Income | 1 | ||||
Dividend Income | 0.6 | ||||
Realized Gains | -0.9 | ||||
Claims Paid | -4.3 | ||||
Level 3 Asset Value, End of Period | 51 | ||||
Postretirement Plan, Expected Future Benefit Payments in Year One | 12.8 | ||||
Postretirement Plan, Expected Future Benefit Payments in Year Two | 13.1 | ||||
Postretirement Plan, Expected Future Benefit Payments in Year Three | 13.3 | ||||
Postretirement Plan, Expected Future Benefit Payments in Year Four | 13.5 | ||||
Postretirement Plan, Expected Future Benefit Payments in Year Five | 13.7 | ||||
Postretirement Plan, Expected Future Benefit Payments Thereafter | 67.6 | ||||
Postemployment Benefits Liability | 1.1 | 1.4 | |||
Fair Value, Inputs, Level 1 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 8.6 | 8.3 | |||
Fair Value, Inputs, Level 3 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 51 | 53.1 | |||
Group Retiree Medical Insurance Contract [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 51 | [1] | 53.1 | [1] | |
Plan investments attributable to affiliates | -5.4 | -4.7 | |||
Group Retiree Medical Insurance Contract [Member] | Fair Value, Inputs, Level 1 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 0 | [1] | 0 | [1] | |
Group Retiree Medical Insurance Contract [Member] | Fair Value, Inputs, Level 3 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 51 | [1] | 53.1 | [1] | |
U.S. Equity Mutual Funds Investment [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 8.5 | 7.9 | |||
U.S. Equity Mutual Funds Investment [Member] | Fair Value, Inputs, Level 1 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 8.5 | 7.9 | |||
U.S. Equity Mutual Funds Investment [Member] | Fair Value, Inputs, Level 3 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 0 | 0 | |||
Money Market Funds [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 0.1 | 0.4 | |||
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 0.1 | 0.4 | |||
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 0 | 0 | |||
Other Postretirement Benefit Plans, Defined Benefit [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Benefit Obligation | 217.6 | 202.4 | 236.4 | ||
Fair Value of Plan Assets | 54.2 | 56.7 | 55.5 | ||
Funded Status of Plan | -163.4 | -145.7 | |||
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year | 7.85% | 8.35% | 8.55% | ||
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | 0 | 0 | |||
OG&E [Member] | |||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||
Fair Value of Plan Assets | $54.20 | $56.70 | |||
[1] | This category represents a group retiree medical insurance contract which invests in a pool of common stocks, bonds and money market accounts, of which a significant portion is comprised of mortgage-backed securities. |
Commitments_and_Contingencies_1
Commitments and Contingencies Commitments and Contingencies (Details) (USD $) | 12 Months Ended | ||
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | |
Loss Contingencies [Line Items] | |||
Operating Leases, Future Minimum Payments Due, Next Twelve Months | $6,600,000 | ||
Operating Leases, Future Minimum Payments, Due in Two Years | 30,800,000 | ||
Operating Leases, Future Minimum Payments, Due in Three Years | 3,400,000 | ||
Operating Leases, Future Minimum Payments, Due in Four Years | 2,400,000 | ||
Operating Leases, Future Minimum Payments, Due in Five Years | 2,400,000 | ||
Operating Leases, Future Minimum Payments, Due Thereafter | 46,400,000 | ||
Operating Leases, Future Minimum Payments Due | 92,000,000 | ||
Operating Leases, Rent Expense, Net | 5,900,000 | 5,700,000 | 5,800,000 |
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 676,300,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 608,400,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 386,100,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 296,100,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 245,500,000 | ||
Unrecorded Unconditional Purchase Obligation | 2,212,400,000 | ||
Utilities Operating Expense, Purchased Power under Long-term Contracts | 60,800,000 | 62,000,000 | 49,500,000 |
OG&E Railcar Lease Agreement [Member] | |||
Loss Contingencies [Line Items] | |||
Loss Contingency, Range of Possible Loss, Maximum | 22,800,000 | ||
OG&E cogeneration capacity and fixed operation and maintenance payments [Member] | |||
Loss Contingencies [Line Items] | |||
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 85,200,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 83,300,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 80,700,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 77,800,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 70,600,000 | ||
Unrecorded Unconditional Purchase Obligation | 397,600,000 | ||
OG&E expected cogeneration energy payments [Member] | |||
Loss Contingencies [Line Items] | |||
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 74,400,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 78,500,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 81,200,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 89,700,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 85,100,000 | ||
Unrecorded Unconditional Purchase Obligation | 408,900,000 | ||
OG&E minimum fuel purchase commitments [Member] | |||
Loss Contingencies [Line Items] | |||
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 389,300,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 246,600,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 43,600,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 0 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 0 | ||
Unrecorded Unconditional Purchase Obligation | 679,500,000 | ||
Long-term Purchase Commitment, Amount | 625,800,000 | 680,800,000 | 653,700,000 |
OG&E expected wind purchase commitments [Member] | |||
Loss Contingencies [Line Items] | |||
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 58,400,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 59,300,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 60,300,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 59,100,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 58,400,000 | ||
Unrecorded Unconditional Purchase Obligation | 295,500,000 | ||
OG&E long-term service agreement commitments [Member] | |||
Loss Contingencies [Line Items] | |||
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 2,500,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 2,600,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 2,700,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 19,400,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 27,500,000 | ||
Unrecorded Unconditional Purchase Obligation | 54,700,000 | ||
Environmental Compliance Plan [Member] | |||
Loss Contingencies [Line Items] | |||
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months | 66,500,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 138,100,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 117,600,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 50,100,000 | ||
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 3,900,000 | ||
Unrecorded Unconditional Purchase Obligation | 376,200,000 | ||
Public Utility Regulatory Policy Act of 1978 [Member] | |||
Loss Contingencies [Line Items] | |||
Percentage of output purchased | 100.00% | ||
OG&E total cogeneration payments [Member] | |||
Loss Contingencies [Line Items] | |||
Long-term Purchase Commitment, Amount | 129,400,000 | 134,800,000 | 135,100,000 |
OG&E capacity payments [Member] | |||
Loss Contingencies [Line Items] | |||
Long-term Purchase Commitment, Amount | 72,300,000 | 74,400,000 | 77,100,000 |
CPV Keenan [Member] | |||
Loss Contingencies [Line Items] | |||
Utilities Operating Expense, Purchased Power under Long-term Contracts | 28,100,000 | 30,900,000 | 25,100,000 |
Edison Mission Energy [Member] | |||
Loss Contingencies [Line Items] | |||
Utilities Operating Expense, Purchased Power under Long-term Contracts | 21,300,000 | 20,600,000 | 20,200,000 |
FPL Energy [Member] | |||
Loss Contingencies [Line Items] | |||
Utilities Operating Expense, Purchased Power under Long-term Contracts | 3,600,000 | 3,300,000 | 3,400,000 |
NextEra Energy [Member] | |||
Loss Contingencies [Line Items] | |||
Utilities Operating Expense, Purchased Power under Long-term Contracts | 7,800,000 | 7,200,000 | 800,000 |
OG&E long-term service agreement commitments [Member] | McClain Plant [Member] | |||
Loss Contingencies [Line Items] | |||
Factored-Fired Hours | 128,000 | ||
Factored-Fired Starts | 3,600 | ||
OG&E long-term service agreement commitments [Member] | Redbud Plant [Member] | |||
Loss Contingencies [Line Items] | |||
Factored-Fired Hours | 144,000 | ||
Additional Factored-Fired Hours | 24,000 | ||
Factored-Fired Starts | 4,500 | ||
OG&E Railcar Lease Agreement [Member] | |||
Loss Contingencies [Line Items] | |||
Operating Leases, Future Minimum Payments Due, Next Twelve Months | 4,500,000 | ||
Operating Leases, Future Minimum Payments, Due in Two Years | 28,700,000 | ||
Operating Leases, Future Minimum Payments, Due in Three Years | 1,000,000 | ||
Operating Leases, Future Minimum Payments, Due in Four Years | 0 | ||
Operating Leases, Future Minimum Payments, Due in Five Years | 0 | ||
Operating Leases, Future Minimum Payments, Due Thereafter | 0 | ||
Operating Leases, Future Minimum Payments Due | 34,200,000 | ||
OG&E Wind Farm Land Lease Agreements [Member] | |||
Loss Contingencies [Line Items] | |||
Operating Leases, Future Minimum Payments Due, Next Twelve Months | 2,100,000 | ||
Operating Leases, Future Minimum Payments, Due in Two Years | 2,100,000 | ||
Operating Leases, Future Minimum Payments, Due in Three Years | 2,400,000 | ||
Operating Leases, Future Minimum Payments, Due in Four Years | 2,400,000 | ||
Operating Leases, Future Minimum Payments, Due in Five Years | 2,400,000 | ||
Operating Leases, Future Minimum Payments, Due Thereafter | 46,400,000 | ||
Operating Leases, Future Minimum Payments Due | 57,800,000 | ||
New Source Review [Member] | |||
Loss Contingencies [Line Items] | |||
Estimated Environmental Capital Costs | 1,100,000,000 | ||
Potential Penalty Under the Federal Clean Air Act | $37,500 |
Rate_Matters_and_Regulation_De
Rate Matters and Regulation (Details) (USD $) | 12 Months Ended |
In Millions, unless otherwise specified | Dec. 31, 2014 |
Oklahoma Corporation Commission [Member] | |
OG&E's Jurisdictional Revenues | 84.00% |
Arkansas Public Service Commission [Member] | |
OG&E's Jurisdictional Revenues | 8.00% |
Federal Energy Regulatory Commission [Member] | |
OG&E's Jurisdictional Revenues | 8.00% |
Section 206 Complaint [Member] | |
Reduction of Revenue | 0.9 |
Regional Haze [Member] | |
Estimated Environmental Capital Costs | 1,100 |
Quarterly_Financial_Data_Detai
Quarterly Financial Data (Details) (USD $) | 3 Months Ended | 12 Months Ended | |||||||||
In Millions, unless otherwise specified | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Operating revenues | $526.20 | $754.70 | $611.80 | $560.40 | $508.90 | $723.20 | $574.60 | $455.50 | $2,453.10 | $2,262.20 | $2,141.20 |
Operating income | 85.6 | 248.4 | 142.2 | 61.8 | 73.3 | 261 | 138.1 | 52.9 | 538 | 525.3 | 489.4 |
Net income | $37.10 | $157.30 | $76.90 | $20.70 | $29.10 | $171.50 | $79 | $13 | $292 | $292.60 | $280.30 |
Schedule_II_Details
Schedule II (Details) (USD $) | 12 Months Ended | ||
In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Valuation and Qualifying Accounts Disclosure [Line Items] | |||
Valuation Allowances and Reserves, Beginning Balance | $1.90 | $2.60 | $3.70 |
Valuation Allowances and Reserves, Charged to Cost and Expense | 2.3 | 2.5 | 3.3 |
Valuation Allowances and Reserves, Deductions | 2.6 | 3.2 | 4.4 |
Valuation Allowances and Reserves, Ending Balance | $1.60 | $1.90 | $2.60 |