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Segment Information - Table (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | $ 2,753 | $ 1,953 |
Intersegment Revenues | 0 | 0 |
Revenues | 2,753 | 1,953 |
Income (Loss) Before Income Taxes | 142 | (1,068) |
TOTAL ASSETS | 11,699 |  | $ 13,028
Scenario, Previously Reported [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (Loss) Before Income Taxes |  | (921) |
Intersegment Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | (1,120) | (783) |
Intersegment Revenues | 1,120 | 783 |
Revenues | 0 | 0 |
Income (Loss) Before Income Taxes | (29) | (57) |
TOTAL ASSETS | (397) |  | (398)
Intersegment Eliminations [Member] | Scenario, Previously Reported [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (Loss) Before Income Taxes |  | (57) |
Exploration And Production [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,469 | 993 |
Exploration And Production [Member] | Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 1,469 | 993 |
Intersegment Revenues | 0 | 0 |
Income (Loss) Before Income Taxes | 567 | (1,042) |
TOTAL ASSETS | 10,147 |  | 11,249
Exploration And Production [Member] | Operating Segments [Member] | Scenario, Previously Reported [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (Loss) Before Income Taxes |  | (895) |
Marketing, Gathering And Compression [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,284 | 960 |
Marketing, Gathering And Compression [Member] | Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 2,404 | 1,743 |
Intersegment Revenues | (1,120) | (783) |
Income (Loss) Before Income Taxes | (386) | 40 |
TOTAL ASSETS | 918 |  | 1,118
Marketing, Gathering And Compression [Member] | Operating Segments [Member] | Scenario, Previously Reported [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (Loss) Before Income Taxes |  | 40 |
Other Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 |
Other Segments [Member] | Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Revenues | 0 | 0 |
Intersegment Revenues | 0 | 0 |
Income (Loss) Before Income Taxes | (10) | (9) |
TOTAL ASSETS | $ 1,031 |  | $ 1,059
Other Segments [Member] | Operating Segments [Member] | Scenario, Previously Reported [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (Loss) Before Income Taxes |  | $ (9) |

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