Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues and other income:
Revenues from contracts with customers	$ 1,381	$ 1,447	$ 2,581	$ 2,984
Net gain (loss) on commodity derivatives	16	(152)	(75)	(254)
Income from equity method investments	31	60	42	97
Net gain (loss) on disposal of assets	(8)	50	34	307
Other income	13	12	48	16
Total revenues and other income	1,433	1,417	2,630	3,150
Costs and expenses:
Production	193	205	380	422
Shipping, handling and other operating	170	126	324	256
Exploration	26	65	85	117
Depreciation, depletion and amortization	605	612	1,159	1,202
Impairments	18	34	24	42
Taxes other than income	79	65	151	129
General and administrative	87	105	181	205
Total costs and expenses	1,178	1,212	2,304	2,373
Income from operations	255	205	326	777
Net interest and other	(64)	(65)	(113)	(110)
Other net periodic benefit costs	2	0	7	(3)
Income before income taxes	193	140	220	664
Provision (benefit) for income taxes	32	44	(115)	212
Net income	$ 161	$ 96	$ 335	$ 452
Net income per share:
Basic	$ 0.20	$ 0.11	$ 0.41	$ 0.53
Per diluted share:
Diluted	$ 0.20	$ 0.11	$ 0.41	$ 0.53
Weighted average common shares outstanding:
Basic	813	854	817	853
Diluted	814	855	817	854