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Investment in Unconsolidated Affiliates Reconciliation of Equity in Earnings of Unconsolidated Affiliates (Tables) | 3 Months Ended
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Mar. 31, 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 months ended March 31, 2015 and 2014.
| Three Months Ended
| March 31,
Reconciliation of Equity in Earnings of Unconsolidated Affiliates | 2015 | 2014
(In millions) |
OGE's share of Enable Net Income | $ | 23.8 |  | $ | 42.5 |
Amortization of basis difference | 3.5 |  | 3.6 |
Elimination of Enogex Holdings fair value and other adjustments | 4.4 |  | 1.8 |
OGE's Equity in earnings of unconsolidated affiliates | $ | 31.7 |  | $ | 47.9 |

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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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