Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES AND OTHER INCOME
Net sales	$ 10,090	$ 12,480	$ 19,312
Interest, dividends and other income	106	118	130
Gain on sale of equity investments and other assets	202	101	2,505
TOTAL REVENUES AND OTHER INCOME	10,398	12,699	21,947
COSTS AND OTHER DEDUCTIONS
Cost of sales (excludes depreciation, depletion, and amortization of $4,266 in 2016, $4,540 in 2015, and $4,257 in 2014)	5,189	5,804	6,803
Selling, general and administrative and other operating expenses	1,330	1,270	1,503
Depreciation, depletion and amortization	4,268	4,544	4,261
Asset impairments and related items	825	10,239	7,379
Taxes other than on income	277	343	550
Exploration expense	62	36	150
Interest and debt expense, net	292	147	77
TOTAL COSTS AND OTHER DEDUCTIONS	12,243	22,383	20,723
INCOME (LOSS) BEFORE INCOME TAXES AND OTHER ITEMS	(1,845)	(9,684)	1,224
(Provision for) benefit from domestic and foreign income taxes	662	1,330	(1,685)
Income from equity investments	181	208	331
INCOME (LOSS) FROM CONTINUING OPERATIONS	(1,002)	(8,146)	(130)
Income from discontinued operations	428	317	760
NET INCOME (LOSS)	(574)	(7,829)	630
Less: Net income attributable to noncontrolling interest			(14)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ (574)	$ (7,829)	$ 616
BASIC EARNINGS (LOSS) PER COMMON SHARE (attributable to common stock)
Income (loss)from continuing operations (in dollars per share)	$ (1.31)	$ (10.64)	$ (0.18)
Discontinued operations, net (in dollars per share)	0.56	0.41	0.97
BASIC EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	(0.75)	(10.23)	0.79
DILUTED EARNINGS (LOSS) PER COMMON SHARE (attributable to common stock)
Income (loss) from continuing operations (in dollars per share)	(1.31)	(10.64)	(0.18)
Discontinued operations, net (in dollars per share)	0.56	0.41	0.97
DILUTED EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	(0.75)	(10.23)	0.79
DIVIDENDS PER COMMON SHARE (in dollars per share)	$ 3.02	$ 2.97	$ 2.88