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Investment in Unconsolidated Affiliates Summarized Balance Sheet Information of Equity Method Investment (Tables) | Mar. 31, 2014
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Summarized Financial Information of Equity Method Investment [Line Items] |
Summarized Balance Sheet Financial Information, Equity Method Investment [Table Text Block] | Summarized unaudited financial information for 100 percent of Enable is presented below at March 31, 2014 and for the three months ended March 31, 2014.
Balance Sheet | March 31, 2014
| (In millions)
Current assets | $ | 500.6 |
Non-current assets | 10,757.6 |
Current liabilities | 1,038.9 |
Non-current liabilities | 2,002.0 |

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