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CONSOLIDATED STATEMENTS OF CAPITALIZATION (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Schedule of Capitalization, Long-term Debt [Line Items] |  |
Common stock, par value $0.01 per share; authorized 450.0 shares; and outstanding 199.4 and 198.5 shares, respectively | $ 2.0 us-gaap_CommonStockValue | $ 2.0 us-gaap_CommonStockValue
Premium on common stock | 1,085.6 us-gaap_AdditionalPaidInCapitalCommonStock | 1,071.6 us-gaap_AdditionalPaidInCapitalCommonStock
Retained earnings | 2,198.2 us-gaap_RetainedEarningsAccumulatedDeficit | 1,991.7 us-gaap_RetainedEarningsAccumulatedDeficit
Accumulated other comprehensive loss, net of tax | (41.4)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | (28.2)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Total stockholders' equity | 3,244.4 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 3,037.1 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total long-term debt | 2,755.3 us-gaap_LongTermDebt | 2,400.1 us-gaap_LongTermDebt
Less long-term debt due within one year | 0 us-gaap_LongTermDebtCurrent | (100.0)us-gaap_LongTermDebtCurrent
Total long-term debt (excluding debt due within one year) | 2,755.3 us-gaap_LongTermDebtNoncurrent | 2,300.1 us-gaap_LongTermDebtNoncurrent
Total Capitalization (including long-term debt due within one year) | 5,999.7 us-gaap_CapitalizationLongtermDebtAndEquity | 5,437.2 us-gaap_CapitalizationLongtermDebtAndEquity
OGE Energy [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Debt Instrument, Unamortized Discount | 0 us-gaap_DebtInstrumentUnamortizedDiscount / dei_LegalEntityAxis = oge_OgeEnergyMember | (0.1)us-gaap_DebtInstrumentUnamortizedDiscount / dei_LegalEntityAxis = oge_OgeEnergyMember
Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Debt Instrument, Unamortized Discount | (10.3)us-gaap_DebtInstrumentUnamortizedDiscount / dei_LegalEntityAxis = oge_OgAndEMember | (5.5)us-gaap_DebtInstrumentUnamortizedDiscount / dei_LegalEntityAxis = oge_OgAndEMember
Senior Notes [Member] | Series Due November 15, 2014 [Member] | OGE Energy [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueNovember152014Member / dei_LegalEntityAxis = oge_OgeEnergyMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 100.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueNovember152014Member / dei_LegalEntityAxis = oge_OgeEnergyMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 5.00%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueNovember152014Member / dei_LegalEntityAxis = oge_OgeEnergyMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due November 24, 2017 [Member] | OGE Energy [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 100.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueNovember242017Member / dei_LegalEntityAxis = oge_OgeEnergyMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueNovember242017Member / dei_LegalEntityAxis = oge_OgeEnergyMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 0.78%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueNovember242017Member / dei_LegalEntityAxis = oge_OgeEnergyMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due January 15, 2016 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 110.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152016Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 110.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152016Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 5.15%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152016Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due July 15, 2017 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 125.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJuly152017Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 125.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJuly152017Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 6.50%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueJuly152017Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due September 1, 2018 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueSeptember12018Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueSeptember12018Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 6.35%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueSeptember12018Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due January 15, 2019 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152019Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152019Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 8.25%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152019Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due July 15, 2027 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 125.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJuly152027Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 125.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJuly152027Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 6.65%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueJuly152027Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due April 15, 2028 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 100.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueApril152028Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 100.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueApril152028Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 6.50%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueApril152028Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due August 1, 2034 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueAugust12034Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 140.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueAugust12034Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 6.50%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueAugust12034Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due January 15, 2036 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 110.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152036Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 110.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152036Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 5.75%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueJanuary152036Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due February 1, 2038 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 200.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueFebruary12038Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 200.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueFebruary12038Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 6.45%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueFebruary12038Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series Due June 1, 2040 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJune12040Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueJune12040Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 5.85%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueJune12040Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Senior Notes due May 15, 2041 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeniorNotesDueMay152041Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeniorNotesDueMay152041Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 5.25%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeniorNotesDueMay152041Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series due May 1, 2043 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueMay12043Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesDueMay12043Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 3.90%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesDueMay12043Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series due March 15, 2044 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesdueMarch152044Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesdueMarch152044Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 4.55%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesdueMarch152044Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Senior Notes [Member] | Series due December 15, 2044 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 250.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesdueDecember152044Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_SeriesdueDecember152044Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt, Weighted Average Interest Rate | 4.00%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_SeriesdueDecember152044Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Long-term Debt [Member] | Due August 31, 2062 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 10.2 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_DueAugust312062Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LongTermDebtMember | 10.3 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_DueAugust312062Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LongTermDebtMember
Debt, Weighted Average Interest Rate | 3.70%us-gaap_DebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = oge_DueAugust312062Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LongTermDebtMember |
Debentures Subject to Mandatory Redemption [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Total long-term debt | 135.4 us-gaap_LongTermDebt / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember |
Debentures Subject to Mandatory Redemption [Member] | Garfield Industrial Authority Bond [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 47.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_GarfieldIndustrialAuthorityBondMember / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember | 47.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_GarfieldIndustrialAuthorityBondMember / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember
Debentures Subject to Mandatory Redemption [Member] | Muskogee Industrial Authority Bond Due 2025 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | 32.4 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_MuskogeeIndustrialAuthorityBondDue2025Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember | 32.4 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_MuskogeeIndustrialAuthorityBondDue2025Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember
Debentures Subject to Mandatory Redemption [Member] | Muskogee Industrial Authority Bond Due 2027 [Member] | Og and E [Member] |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |
Long-term Debt, Gross | $ 56.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_MuskogeeIndustrialAuthorityBondDue2027Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember | $ 56.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = oge_MuskogeeIndustrialAuthorityBondDue2027Member / dei_LegalEntityAxis = oge_OgAndEMember / us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis = us-gaap_DebenturesSubjectToMandatoryRedemptionMember

X
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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