Earnings per Common Share - Schedule of EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income (Numerator)
Net income	$ 677	$ 608
Less: dividends attributable to participating securities	(2)	(2)
Less: Cimarex redeemable preferred stock dividends	0	(1)
Net income available to common stockholders	$ 675	$ 605
Shares (Denominator)
Weighted-average shares - basic (in shares)	764	810
Dilution effect of stock awards at end of period (in shares)	4	4
Weighted-average shares - diluted (in shares)	768	814
Earnings per share:
Basic (in dollars per share)	$ 0.88	$ 0.75
Diluted (in dollars per share)	$ 0.88	$ 0.74