SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Changes in the Standardized Measure) (Details) (USD $) In Millions, unless otherwise specified	7 Months Ended
	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