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Investment in Unconsolidated Affiliates Reconciliation of Equity in Earnings of Unconsolidated Affiliates (Tables) | 6 Months Ended
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Jun. 30, 2015
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Line Items] |
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block] | The following table reconciles OGE Energy's equity in earnings of its unconsolidated affiliates for the three and six months ended June 30, 2015 and 2014.
| Three Months Ended | Six Months Ended
| June 30, | June 30,
Reconciliation of Equity in Earnings of Unconsolidated Affiliates | 2015 | 2014 | 2015 | 2014
(In millions) |  |
OGE's share of Enable Net Income | $ | 20.6 |  | $ | 32.2 |  | $ | 44.4 |  | $ | 74.7 |
Amortization of basis difference | 3.6 |  | 3.4 |  | 7.1 |  | 7.0 |
Elimination of Enogex Holdings fair value and other adjustments | 4.0 |  | 3.7 |  | 8.4 |  | 5.5 |
OGE's Equity in earnings of unconsolidated affiliates | $ | 28.2 |  | $ | 39.3 |  | $ | 59.9 |  | $ | 87.2 |

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- Definition [Line Items] for Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table] + References No definition available. + Details
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- Definition [Table Text Block] for Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table] + References No definition available. + Details
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