Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Preferred stock dividends — Series B	Preferred stock dividends — Series C	Common stock and paid-in capital	Preferred stock	Preferred stock Preferred stock dividends — Series B	Preferred stock Preferred stock dividends — Series C	Retained earnings (accumulated deficit)	Retained earnings (accumulated deficit) Preferred stock dividends — Series B	Retained earnings (accumulated deficit) Preferred stock dividends — Series C	Accumulated other comprehensive income (loss)	Treasury stock
Beginning balance at Dec. 31, 2020	$ 14,703			$ 21,544	$ 0			$ (4,278)			$ 631	$ (3,194)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,060							3,060
Net proceeds from issuance		$ 1,335	$ 989			$ 1,335	$ 989
Preferred stock dividends		(36)	(21)						$ (36)	$ (21)
Share-based compensation	127			127
Other comprehensive income (loss)	(789)										(789)
Common stock repurchases	(1,994)											(1,994)
Common stock dividends	(324)							(324)
Ending balance at Dec. 31, 2021	17,050			21,671	2,324			(1,599)			(158)	(5,188)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,714							1,714
Preferred stock dividends		(63)	(47)						(63)	(47)
Share-based compensation	145			145
Other comprehensive income (loss)	(3,901)										(3,901)
Common stock repurchases	(1,650)											(1,650)
Common stock dividends	(389)							(389)
Ending balance at Dec. 31, 2022	12,859			21,816	2,324			(384)			(4,059)	(6,838)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,020							1,020
Preferred stock dividends		$ (63)	$ (47)						$ (63)	$ (47)
Share-based compensation	159			159
Other comprehensive income (loss)	243										243
Common stock repurchases	(33)											(33)
Common stock dividends	(372)							(372)
Ending balance at Dec. 31, 2023	$ 13,766			$ 21,975	$ 2,324			$ 154			$ (3,816)	$ (6,871)