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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		$ 0.330625oge_ThresholdforPerUnitIncentiveDistributions			0.330625oge_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	25,000,000us-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.		42,832,291oge_CommonUnitsHeldbyLimitedPartnersoftheLLCorLP. / dei_LegalEntityAxis = oge_OgeHoldingsMember
Subordinated Units Held by Limited Partners of the LLC or LP.		68,150,514oge_SubordinatedUnitsHeldbyLimitedPartnersoftheLLCorLP. / dei_LegalEntityAxis = oge_OgeHoldingsMember
Subsequent Event [Member]
Distribution Made to Limited Partner, Distributions Declared, Per Unit						$ 0.30875us-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.

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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

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+ References

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Percent of Subordinated Limited Partner Units

+ References

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- Definition

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+ References

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- Definition

Per unit level at which incentive distributions will be declared and paid to the general partner.

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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

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-Topic 272

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-Topic 272

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-Section 50

-Paragraph 1

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

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-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 16

-Subparagraph a, b

-Article 6

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