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Investment in Unconsolidated Affiliate and Related Party Transactions (Tables) | 8 Months Ended
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Dec. 31, 2013
Investment in Unconsolidated Affiliate and Related Party Transaction [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | Related Party Transactions with Enable
| Eight Months Ended
(In millions) | December 31, 2013
Operating Revenues: |
Electricity to power electric compression assets | $ | 7.7 |
Cost of Sales: |
Natural gas transportation services | $ | 23.2 |
Natural gas storage services | 8.6 |
Natural gas purchases | 14.8 |
Summarized Balance Sheet Financial Information, Equity Method Investment [Table Text Block] | As Enable began operations on May 1, 2013, summarized unaudited financial information for 100 percent of Enable is presented below at December 31, 2013 and for the eight months ended December 31, 2013.
Balance Sheet | December 31, 2013
| (In millions)
Current assets | $ | 549 |
Non-current assets | 10,683 |
Current liabilities | 720 |
Non-current liabilities | 2,331 |
Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block] |
| Eight Months Ended
Income Statement | December 31, 2013
| (In millions)
Operating revenues | $ | 2,122.6 |
Cost of sales | 1,240.5 |
Operating income | 321.9 |
Net income | 288.6 |
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block] |
| Eight Months Ended
Reconciliation of Equity in Earnings of Unconsolidated Affiliates | December 31, 2013
| (In millions)
OGE's 28.5% share of Enable Net Income | $ | 82.1 |
Amortization of basis difference | 9.4 |
Elimination of Enogex Holdings fair value and other adjustments | 10.4 |
OGE's Equity in earnings of unconsolidated affiliates | $ | 101.9 |

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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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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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