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SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Changes in the Standardized Measure) (Details) (USD $) In Millions, unless otherwise specified | 7 Months Ended
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Dec. 31, 2013
Supplemental Oil and Gas Information [Abstract] |
Reserves acquired in the acquisitions of PXP and MMR | $ 14,467
Sales, net of production expenses | (2,296)
Net changes in sales and transfer prices, net of production expenses | (459)
Extensions, discoveries and improved recoveries | 752
Changes in estimated future development costs | (1,190)
Previously estimated development costs incurred during the year | 578
Sales of reserves in-place | (12)
Other purchases of reserves in-place | 0
Revisions of quantity estimates | 102
Accretion of discount | 701
Net change in income taxes | (3,226)
Balance at December 31, 2013 | $ 9,417

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