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Investment in Unconsolidated Affiliates Summarized Income Statement of Equity Method Investment (Tables) | 6 Months Ended
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Jun. 30, 2014
Summarized Financial Information of Equity Method Investment [Line Items] |
Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block] |
| Three Months Ended | Six Months Ended
Income Statement | June 30, 2014 | June 30, 2013 | June 30, 2014 | June 30, 2013
| (In millions)
Operating revenues | $ | 826.7 |  | $ | 502.0 |  | $ | 1,828.3 |  | $ | 502.0 |
Cost of sales | 478.2 |  | 294.6 |  | 1,110.8 |  | 294.6 |
Operating income | 138.6 |  | 75.0 |  | 300.5 |  | 75.0 |
Net income attributable to Enable | 120.2 |  | 65.1 |  | 269.4 |  | 65.1 |

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- Definition Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block] + References No definition available. + Details
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