Earnings per Common Share - Schedule of EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Income (Numerator)
Net income	$ 1,196	$ 1,229	$ 608	$ 64	$ 30	$ 126	$ 3,033	$ 220
Less: dividends attributable to participating securities	(2)			0			(5)	0
Less: Cimarex redeemable preferred stock dividends	0			0			(1)	0
Net income available to common stockholders	$ 1,194			$ 64			$ 3,027	$ 220
Shares (Denominator)
Weighted-average shares - basic (in shares)	792			400			801	399
Dilution effect of stock awards at end of period (in shares)	5			3			4	3
Weighted-average shares - diluted (in shares)	797			403			805	402
Earnings per share
Basic (in dollars per share)	$ 1.51			$ 0.16			$ 3.78	$ 0.55
Diluted (in dollars per share)	$ 1.50			$ 0.16			$ 3.77	$ 0.55