Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
REVENUES AND OTHER INCOME
Net sales	$ 17,809	$ 20,911	$ 17,824
Interest, dividends and other income	118	217	136
Gains (losses) on sale of assets, net	(1,666)	622	974
Total	16,261	21,750	18,934
COSTS AND OTHER DEDUCTIONS
Oil and gas operating expense	3,065	3,282	2,761
Transportation and gathering expense	1,600	635	152
Chemical and midstream cost of sales	2,408	2,791	2,833
Purchased commodities	1,395	1,679	822
Selling, general and administrative	864	893	585
Other operating and non-operating expense	884	1,421	1,028
Depreciation, depletion and amortization	8,097	6,140	3,977
Asset impairments and other charges	11,083	1,361	561
Taxes other than on income	622	840	439
Anadarko Acquisition-related costs	339	1,647	0
Exploration expense	132	247	110
Interest and debt expense, net	1,424	1,066	389
Total	31,913	22,002	13,657
Income (loss) before income taxes and other items	(15,652)	(252)	5,277
OTHER ITEMS
Gains (losses) on interest rate swaps and warrants, net	(423)	233	0
Income from equity investments	370	373	331
Total	(53)	606	331
Income (loss) from continuing operations before income taxes	(15,705)	354	5,608
Income tax benefit (expense)	2,172	(861)	(1,477)
Income (loss) from continuing operations	(13,533)	(507)	4,131
Loss from discontinued operations, net of tax	(1,298)	(15)	0
NET (LOSS) INCOME	(14,831)	(522)	4,131
Less: Net loss attributable to noncontrolling interest	0	(145)	0
Less: Preferred stock dividends	(844)	(318)	0
NET (LOSS) INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ (15,675)	$ (985)	$ 4,131
PER COMMON SHARE, BASIC
Income (loss) from continuing operations—basic (in dollars per share)	$ (15.65)	$ (1.20)	$ 5.40
Loss from discontinued operations—basic (in dollars per share)	(1.41)	(0.02)	0
Net income (loss) attributable to common stockholders—basic (in dollars per share)	(17.06)	(1.22)	5.40
PER COMMON SHARE, DILUTED
Income (loss) from continuing operations—diluted (in dollars per share)	(15.65)	(1.20)	5.39
Loss from discontinued operations—diluted (in dollars per share)	(1.41)	(0.02)	0
Net income (loss) attributable to common stockholders—diluted (in dollars per share)	$ (17.06)	$ (1.22)	$ 5.39