Asset Acquisitions, Dispositions and Other (Detail 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Sales and other operating revenues and income from discontinued operations related to California Resources Company
Income from discontinued operations	$ (4)	$ 273	$ (7)	$ 528
California Resources Corporation | Spin-off California Resources Corp
Sales and other operating revenues and income from discontinued operations related to California Resources Company
Sales and other operating revenue from discontinued operations		1,141		2,261
Income from discontinued operations before-tax		422		812
Income tax expense		(148)		(286)
Income from discontinued operations		$ 274		$ 526