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Summary of Significant Accounting Policies Equity Ownership (Details) | 8 Months Ended |
--- | --- | ---
Dec. 31, 2013 | May 01, 2013
CenterPoint [Member] |  |
Percentage Share of Management Rights |  | 50.00%
OGE Energy [Member] |  |
Percentage Share of Management Rights |  | 50.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | 28.50% |

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- Definition Percentage Share of Management Rights + References No definition available. + Details
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Namespace Prefix: | oge_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of units or percentage investment held by one or more members or limited partners of the LLC or LP. + References Reference 1: 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 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration