Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues and other income:
Revenues from contracts with customers	$ 1,249	$ 1,538	$ 3,830	$ 4,522
Net gain (loss) on commodity derivatives	47	(70)	(28)	(324)
Income from equity method investments	21	64	63	161
Net gain on disposal of assets	22	16	56	323
Other income	6	119	54	135
Total revenues and other income	1,345	1,667	3,975	4,817
Costs and expenses:
Production	163	215	543	637
Shipping, handling and other operating	138	152	462	408
Exploration	22	56	107	173
Depreciation, depletion and amortization	622	626	1,781	1,828
Impairments	0	8	24	50
Taxes other than income	81	86	232	215
General and administrative	82	101	263	306
Total costs and expenses	1,108	1,244	3,412	3,617
Income from operations	237	423	563	1,200
Net interest and other	(64)	(58)	(177)	(168)
Other net periodic benefit costs	2	(8)	9	(11)
Income before income taxes	175	357	395	1,021
Provision (benefit) for income taxes	10	103	(105)	315
Net income	$ 165	$ 254	$ 500	$ 706
Net income per share:
Basic	$ 0.21	$ 0.30	$ 0.62	$ 0.83
Per diluted share:
Diluted	$ 0.21	$ 0.30	$ 0.62	$ 0.83
Weighted average common shares outstanding:
Basic	802	848	813	852
Diluted	803	849	813	853