Earnings per Share - Schedule of EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Income (Numerator)
Net income	$ 323	$ 209	$ 677	$ 1,196	$ 1,229	$ 608	$ 1,209	$ 3,033
Less: dividends attributable to participating securities	(1)			(2)			(4)	(5)
Less: Cimarex redeemable preferred stock dividends	0			0			0	(1)
Net income available to common stockholders	$ 322			$ 1,194			$ 1,205	$ 3,027
Shares (Denominator)
Weighted-average shares - basic (in shares)	753			792			757	801
Dilution effect of stock awards at end of period (in shares)	5			5			5	4
Weighted-average shares - diluted (in shares)	758			797			762	805
Earnings per share
Basic (in dollars per share)	$ 0.43			$ 1.51			$ 1.59	$ 3.78
Diluted (in dollars per share)	$ 0.42			$ 1.50			$ 1.58	$ 3.77