Income/(Loss) Per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Basic income/(loss) per share:
Net income/(loss)	$ 738	$ 511	$ 308	$ (1,335)	$ 1,249	$ (1,027)
Less: Cumulative dividends attributable to Series A Preferred Stock	17		17		34	21
Net Income/(Loss) Available to Common Stockholders, basic	$ 721		$ 291		$ 1,215	$ (1,048)
Weighted average number of common shares outstanding — basic (in shares)	208,000		231,000		209,000	230,000
Income/(loss) per weighted average common share — basic (in usd per share)	$ 3.47		$ 1.26		$ 5.81	$ (4.56)
Diluted income/(loss) per share:
Net income/(loss)	$ 738	$ 511	$ 308	$ (1,335)	$ 1,249	$ (1,027)
Less: Cumulative dividends attributable to Series A Preferred Stock	17		17		34	21
Net Income/(Loss) Available to Common Stockholders, diluted	$ 721		$ 291		$ 1,215	$ (1,048)
Weighted average number of common shares outstanding — basic (in shares)	208,000		231,000		209,000	230,000
Incremental shares attributable to the issuance of equity compensation (treasury stock method) (in shares)	3,000		1,000		2,000	0
Incremental shares attributable to the potential share settlements of the Convertible Senior Notes (if converted method) (in shares)	3,000		0		3,000	0
Weighted average number of common shares outstanding — diluted (in shares)	214,000		232,000		214,000	230,000
Income/(loss) per weighted average common share — diluted (in usd per share)	$ 3.37		$ 1.25		$ 5.68	$ (4.56)