Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues	$ 3,877	$ 3,382	$ 10,453	$ 11,091
Cost of sales:
Production and delivery	2,509	2,595	7,957	7,862
Depreciation, depletion and amortization	643	823	1,937	2,522
Impairment of oil and gas properties	239	3,652	4,317	9,442
Metals inventory adjustments	20	91	27	154
Total cost of sales	3,411	7,161	14,238	19,980
Selling, general and administrative expenses	110	122	408	421
Mining exploration and research expenses	13	26	46	83
Environmental obligations and shutdown (credits) costs	(3)	37	18	61
Net gain on sales of assets	(13)	0	(762)	(39)
Total costs and expenses	3,518	7,346	13,948	20,506
Operating income (loss)	359	(3,964)	(3,495)	(9,415)
Interest expense, net	(187)	(157)	(574)	(438)
Net gain on early extinguishment of debt	15	0	51	0
Other (expense) income, net	(10)	(41)	54	2
Income (loss) before income taxes and equity in affiliated companies' net earnings (losses)	177	(4,162)	(3,964)	(9,851)
Benefit from (provision for) income taxes	114	349	(79)	1,762
Equity in affiliated companies’ net earnings (losses)	1	(2)	9	(1)
Net income (loss) from continuing operations	292	(3,815)	(4,034)	(8,090)
Net (loss) income from discontinued operations	(6)	25	(191)	95
Net income (loss)	286	(3,790)	(4,225)	(7,995)
Net income attributable to noncontrolling interests:
Continuing operations	(37)	(13)	(146)	(61)
Discontinued operations	(22)	(16)	(44)	(68)
Preferred dividends attributable to redeemable noncontrolling interest	(10)	(11)	(31)	(31)
Net income (loss) attributable to common stockholders	$ 217	$ (3,830)	$ (4,446)	$ (8,155)
Basic and diluted net income (loss) per share attributable to common stockholders:
Continuing operations	$ 0.18	$ (3.59)	$ (3.27)	$ (7.80)
Discontinued operations	(0.02)	0.01	(0.18)	0.03
Basic and diluted net income (loss) per share attributable to common stockholders:	$ 0.16	$ (3.58)	$ (3.45)	$ (7.77)
Basic	1,346	1,071	1,289	1,050
Diluted	1,351	1,071	1,289	1,050
Dividends declared per share of common stock	$ 0	$ 0.05	$ 0	$ 0.2605