Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues and other income:
Sales and other operating revenues, including related party	$ 714	$ 1,280
Marketing revenues	58	204
Income from equity method investments	14	36
Net gain (loss) on disposal of assets	(60)	1
Other income	4	11
Total revenues and other income	730	1,532
Costs and expenses:
Production	328	444
Marketing, including purchases from related parties	58	205
Other operating	109	107
Exploration	24	90
Depreciation, depletion and amortization	609	821
Impairments	1	0
Taxes other than income	48	67
General and administrative	151	171
Total costs and expenses	1,328	1,905
Income (loss) from operations	(598)	(373)
Net interest and other	(85)	(47)
Income (loss) before income taxes	(683)	(420)
Provision (benefit) for income taxes	(276)	(144)
Income (loss) from operations	(407)	(276)
Net income (loss)	$ (407)	$ (276)
Basic:
Net income (loss), per basic share	$ (0.56)	$ (0.41)
Diluted:
Net income (loss), per diluted share	(0.56)	(0.41)
Dividends paid, per share	$ 0.05	$ 0.21
Weighted average common shares outstanding, basic	730	675
Weighted average common shares outstanding, diluted	730	675