Condensed Consolidated Statement of Changes in Equity (unaudited) - USD ($) $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment	[1]	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred stock dividends — Series B	Preferred stock dividends — Series C	Common stock and paid-in capital	Common stock and paid-in capital Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred stock	Preferred stock Cumulative Effect, Period of Adoption, Adjusted Balance	Retained earnings (accumulated deficit)	Retained earnings (accumulated deficit) Cumulative Effect, Period of Adoption, Adjustment	[1]	Retained earnings (accumulated deficit) Cumulative Effect, Period of Adoption, Adjusted Balance	Retained earnings (accumulated deficit) Preferred stock dividends — Series B	Retained earnings (accumulated deficit) Preferred stock dividends — Series C	Accumulated other comprehensive loss	Accumulated other comprehensive loss Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury stock	Treasury stock Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning 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		319										319
Preferred stock dividends						$ (16)	$ (12)									$ (16)	$ (12)
Share-based compensation		64						64
Other comprehensive (loss) income, net of tax		283																283
Common stock repurchases		(27)																		(27)
Common stock dividends		(92)										(92)
Ending balance at Mar. 31, 2023		13,378						21,880		2,324		(185)						(3,776)		(6,865)
Beginning balance at Dec. 31, 2022		12,859						21,816		2,324		(384)						(4,059)		(6,838)
Ending balance at Dec. 31, 2023		$ 13,766	$ (2)		$ 13,764			21,975	$ 21,975	2,324	$ 2,324	154	$ (2)		$ 152			(3,816)	$ (3,816)	(6,871)	$ (6,871)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	[1]	Accounting Standards Update 2023-02
Net income		$ 157										157
Preferred stock dividends						$ (16)	$ (12)									$ (16)	$ (12)
Share-based compensation		59						59
Other comprehensive (loss) income, net of tax		(173)																(173)
Common stock repurchases		(29)																		(29)
Common stock dividends		(93)										(93)
Ending balance at Mar. 31, 2024		$ 13,657						$ 22,034		$ 2,324		$ 188						$ (3,989)		$ (6,900)

[1] Refer to the section titled Recently Adopted Accounting Standards in Note 1 for additional information.