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Derivative Instruments and Hedging Activities, Income Statement Presentation Related to Derivative Instruments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Income | $ 0.0 | $ 0.0 |
Enogex [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Income |  |  | $ (5.1)
Enogex [Member] | Natural Gas [Member] | Fixed Swaps/Futures [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Income |  |  | 1.0
Enogex [Member] | Sales [Member] | Natural Gas [Member] | Physical [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Income |  |  | (6.1)
Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Other Comprehensive Income |  |  | (0.2)
Amount Reclassifed from Accumulated Other Comprehensive Income (Loss) into Income |  |  | 5.0
Amount Recognized in Income |  |  | 0.0
Cash Flow Hedging [Member] | Enogex [Member] | Natural Gas [Member] | Fixed Swaps/Futures [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Other Comprehensive Income |  |  | (0.2)
Amount Reclassifed from Accumulated Other Comprehensive Income (Loss) into Income |  |  | 5.2
Amount Recognized in Income |  |  | 0.0
Cash Flow Hedging [Member] | OGE Energy Corp. [Member] | Interest Rate Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount Recognized in Other Comprehensive Income |  |  | 0.0
Amount Reclassifed from Accumulated Other Comprehensive Income (Loss) into Income |  |  | (0.2)
Amount Recognized in Income |  |  | $ 0.0

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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