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Investment in Unconsolidated Affiliates Reconciliation of Equity in Earnings of Unconsolidated Affiliates (Tables) | 5 Months Ended
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Sep. 30, 2013
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Line Items] |
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block] |
| Three Months Ended | Five Months Ended
Reconciliation of Equity in Earnings of Unconsolidated Affiliates | September 30, 2013 | September 30, 2013
| (In millions)
OGE's 28.5% share of Enable Net Income | $ | 35.1 |  | $ | 53.6 |
Amortization of basis difference | 5.9 |  | 5.9 |
Elimination of Enogex Holdings fair value adjustments | 5.0 |  | 5.0 |
OGE's Equity in earnings of unconsolidated affiliates | $ | 46.0 |  | $ | 64.5 |

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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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