Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues and other income:
Revenues from contracts with customers	$ 490	$ 1,381	$ 1,514	$ 2,581
Net gain (loss) on commodity derivatives	(70)	16	132	(75)
Income (loss) from equity method investments	(152)	31	(164)	42
Net gain (loss) on disposal of assets	(2)	(8)	7	34
Other income	6	13	13	48
Total revenues and other income	272	1,433	1,502	2,630
Costs and expenses:
Production	129	193	289	380
Shipping, handling and other operating	105	170	249	324
Exploration	26	26	54	85
Depreciation, depletion and amortization	597	605	1,241	1,159
Impairments	0	18	97	24
Taxes other than income	30	79	96	151
General and administrative	88	87	164	181
Total costs and expenses	975	1,178	2,190	2,304
Income (loss) from operations	(703)	255	(688)	326
Net interest and other	(69)	(64)	(133)	(113)
Other net periodic benefit credit	7	2	7	7
Income (loss) before income taxes	(765)	193	(814)	220
Provision (benefit) for income taxes	(15)	32	(18)	(115)
Net income (loss)	$ (750)	$ 161	$ (796)	$ 335
Net income (loss) per share:
Basic (in dollars per share)	$ (0.95)	$ 0.20	$ (1.00)	$ 0.41
Per diluted share:
Diluted (in dollars per share)	$ (0.95)	$ 0.20	$ (1.00)	$ 0.41
Weighted average common shares outstanding:
Basic (in shares)	790	813	793	817
Diluted (in shares)	790	814	793	817