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v2.4.1.9

Summary of Significant Accounting Policies Equity Ownership (Details) (USD $) | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 7 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2014 | Dec. 31, 2014 | May 30, 2014 | Mar. 31, 2014 | Dec. 31, 2014 | Mar. 31, 2015
Threshold for Per Unit Incentive Distributions |  | $ 0.330625 oge_ThresholdforPerUnitIncentiveDistributions |  |  | 0.330625 oge_ThresholdforPerUnitIncentiveDistributions |
Incentive Distribution, Payments Made and Minimum Distribution Level |  | 50.00%oge_IncentiveDistributionPercentageLevel |  |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | 6.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest |  |  |  |  |
Enable Midstream Partners [Member] |  |  |  |  |  |
Partners' Capital Account, Units, Sold in Public Offering | 25,000,000 us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering / dei_LegalEntityAxis = oge_EnableMidstreamPartnersMember |  |  |  |  |
CenterPoint [Member] |  |  |  |  |  |
Percentage Share of Management Rights |  | 50.00%oge_PercentageShareOfManagementRights / dei_LegalEntityAxis = oge_CenterpointMember |  |  | 50.00%oge_PercentageShareOfManagementRights / dei_LegalEntityAxis = oge_CenterpointMember |
Percent of Subordinated Limited Partner Units |  | 61.40%oge_PercentofSubordinatedLimitedPartnerUnits / dei_LegalEntityAxis = oge_CenterpointMember |  |  | 61.40%oge_PercentofSubordinatedLimitedPartnerUnits / dei_LegalEntityAxis = oge_CenterpointMember |
Percent of Incentive Distribution Rights |  | 40.00%oge_PercentOfIncentiveDistributionRights / dei_LegalEntityAxis = oge_CenterpointMember |  |  | 40.00%oge_PercentOfIncentiveDistributionRights / dei_LegalEntityAxis = oge_CenterpointMember |
OGE Energy [Member] |  |  |  |  |  |
Percentage Share of Management Rights |  | 50.00%oge_PercentageShareOfManagementRights / dei_LegalEntityAxis = oge_OgeEnergyMember |  |  | 50.00%oge_PercentageShareOfManagementRights / dei_LegalEntityAxis = oge_OgeEnergyMember |
Percent of Incentive Distribution Rights |  | 60.00%oge_PercentOfIncentiveDistributionRights / dei_LegalEntityAxis = oge_OgeEnergyMember |  |  | 60.00%oge_PercentOfIncentiveDistributionRights / dei_LegalEntityAxis = oge_OgeEnergyMember |
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest |  |  | 26.70%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = oge_OgeEnergyMember | 28.50%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = oge_OgeEnergyMember | 26.30%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = oge_OgeEnergyMember |
OGE Holdings [Member] |  |  |  |  |  |
Common Units Held by Limited Partners of the LLC or LP. |  | 42,832,291 oge_CommonUnitsHeldbyLimitedPartnersoftheLLCorLP. / dei_LegalEntityAxis = oge_OgeHoldingsMember |  |  |  |
Subordinated Units Held by Limited Partners of the LLC or LP. |  | 68,150,514 oge_SubordinatedUnitsHeldbyLimitedPartnersoftheLLCorLP. / dei_LegalEntityAxis = oge_OgeHoldingsMember |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |
Distribution Made to Limited Partner, Distributions Declared, Per Unit |  |  |  |  |  | $ 0.30875 us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X
- Definition The number of common units held by one or more members or limited partners of the LLC or LP. + References No definition available. + Details
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- Definition Percentage scale of Incentive distribution payments that could be made to managing members or general partners, based on amounts in excess of distributions to Limited Liability Corporation or Limited Partnership members or limited partners. + References No definition available. + Details
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- Definition Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
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