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Investment in Unconsolidated Affiliates Summarized Income Statement of Equity Method Investment (Tables) | 9 Months Ended
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Sep. 30, 2015
Summarized Financial Information of Equity Method Investment [Line Items] |
Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block] |
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
Income Statement | 2015 | 2014 | 2015 | 2014
| (In millions)
Operating revenues | $ | 646 |  | $ | 803 |  | $ | 1,852 |  | $ | 2,632 |
Cost of sales | 287 |  | 439 |  | 856 |  | 1,550 |
Operating income | (975 | ) | 152 |  | (778 | ) | 452 |
Net income | (985 | ) | 139 |  | (817 | ) | 408 |

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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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