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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, 2014
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Line Items] |
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block] |
| Three Months Ended | Six Months Ended
Reconciliation of Equity in Earnings of Unconsolidated Affiliates | June 30, 2014 | June 30, 2013 | June 30, 2014 | June 30, 2013
(In millions) |  |
OGE's share of Enable Net Income | $ | 32.2 |  | $ | 18.5 |  | $ | 74.7 |  | $ | 18.5 |
Amortization of basis difference | 3.4 |  | — |  | 7.0 |  | — |
Elimination of Enogex Holdings fair value and other adjustments | 3.7 |  | — |  | 5.5 |  | — |
OGE's Equity in earnings of unconsolidated affiliates | $ | 39.3 |  | $ | 18.5 |  | $ | 87.2 |  | $ | 18.5 |

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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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