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Investment in Unconsolidated Affiliates (Tables) | 3 Months Ended
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Mar. 31, 2014
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | Related Party Transactions with Enable
| Three Months Ended
| March 31,
(In millions) | 2014
Operating Revenues: |
Electricity to power electric compression assets | $ | 2.9 |
Cost of Sales: |
Natural gas transportation services | $ | 8.7 |
Natural gas storage services | 3.3 |
Natural gas purchases | 5.0 |

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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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