Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES AND OTHER INCOME
Net sales	$ 20,393	$ 17,824	$ 12,508
Interest, dividends and other income	217	136	99
Gains on sale of equity investments and other assets, net	622	974	667
Total	21,232	18,934	13,274
COSTS AND OTHER DEDUCTIONS
Oil and gas operating expense	3,246	2,761	2,427
Transportation expense	621	152	175
Chemical and midstream cost of sales	2,791	2,833	2,938
Purchased commodities	1,679	822	54
Selling, general and administrative	882	585	546
Other operating and non-operating expense	1,425	1,028	878
Depreciation, depletion and amortization	5,981	3,977	4,002
Asset impairments and other charges	1,361	561	545
Taxes other than on income	707	439	311
Anadarko acquisition-related costs	1,647	0	0
Exploration expense	246	110	82
Interest and debt expense, net	1,066	389	345
Total	21,652	13,657	12,303
Income (loss) before income taxes and other items	(420)	5,277	971
OTHER ITEMS
Gains on interest rate swaps and warrants, net	233	0	0
Income from equity investments	373	331	357
Total	606	331	357
Income from continuing operations before income taxes	186	5,608	1,328
Income tax expense	(693)	(1,477)	(17)
Income (loss) from continuing operations	(507)	4,131	1,311
Loss from discontinued operations, net of tax	(15)	0	0
NET INCOME (LOSS)	(522)	4,131	1,311
Less: Net income attributable to noncontrolling interest	(145)	0	0
Less: Preferred stock dividends	(318)	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ (985)	$ 4,131	$ 1,311
PER COMMON SHARE, BASIC
Income (loss) from continuing operations—basic (in dollars per share)	$ (1.20)	$ 5.40	$ 1.71
(Loss) from discontinued operations—basic (in dollars per share)	(0.02)	0	0
Net income (loss) attributable to common stockholders—basic (in dollars per share)	(1.22)	5.40	1.71
PER COMMON SHARE, DILUTED
Income (loss) from continuing operations—diluted (in dollars per share)	(1.20)	5.39	1.70
(Loss) from discontinued operations—diluted (in dollars per share)	(0.02)	0	0
Net income (loss) attributable to common stockholders—diluted (in dollars per share)	(1.22)	5.39	1.70
DIVIDENDS PER COMMON SHARE (in dollars per share)	$ 3.14	$ 3.10	$ 3.06