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Investment in Unconsolidated Affiliates (Tables) | 2 Months Ended
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Jun. 30, 2013
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | Related Party Transactions with Enable Midstream Partners
| Three Months Ended | Five Months Ended
| September 30, | September 30,
(In millions) | 2013 | 2013
Operating Revenues: |  |
Electricity to power electric compression assets | $ | 3.9 |  | $ | 5.2 |
Cost of Goods Sold: |  |
Natural gas transportation services | $ | 8.7 |  | $ | 14.5 |
Natural gas storage services | 3.1 |  | 5.4 |
Natural gas purchases (A) | 9.4 |  | 11.9 |
(A) | At September 30, 2013, there was $1.4 million of natural gas purchases recorded for these activities.

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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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