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Investment in Unconsolidated Affiliate and Related Party Transactions Summarized Income Statement of Equity Method Investment (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract] |  |
Operating revenues | $ 3,367.0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue | $ 2,123.0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
Cost of sales | 1,914.0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales | 1,241.0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales
Operating income | 586.0 oge_EquityMethodInvestmentSummarizedFinancialInformationOperatingIncome | 322.0 oge_EquityMethodInvestmentSummarizedFinancialInformationOperatingIncome
Net income attributable to Enable | $ 530.0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss | $ 289.0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

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- Definition Equity Method Investment, Summarized Financial Information, Operating Income + References No definition available. + Details
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- Details
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- Definition The amount of the cost of sales reported by an equity method investment of the entity. + References No definition available. + Details
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- Definition The amount of net income (loss) reported by an equity method investment of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(g)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph bb -Article 1 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph g -Subparagraph 1, 2 -Article 4 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph w -Article 1 + Details
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- Definition The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity. + References No definition available. + Details
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