Earnings per Common Share - Schedule of EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Income (Numerator)
Net income	$ 1,229	$ 608	$ 30	$ 126	$ 1,837	$ 156
Less: dividends attributable to participating securities	(1)		0		(3)	0
Less: Cimarex redeemable preferred stock dividends	0		0		(1)	0
Net income available to common stockholders	$ 1,228		$ 30		$ 1,833	$ 156
Shares (Denominator)
Weighted-average shares - basic (in shares)	803		400		806	399
Dilution effect of stock awards at end of period (in shares)	5		3		3	3
Weighted-average shares - diluted (in shares)	808		403		809	402
Earnings per share
Basic (in dollars per share)	$ 1.53		$ 0.08		$ 2.28	$ 0.39
Diluted (in dollars per share)	$ 1.52		$ 0.08		$ 2.27	$ 0.39