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	944										944
Preferred stock dividends					$ (48)	$ (35)									$ (48)	$ (35)
Share-based compensation	120						120
Other comprehensive income (loss)	(706)																(706)
Common stock repurchases	(29)																		(29)
Common stock dividends	(280)										(280)
Ending balance at Sep. 30, 2023	12,825						21,936		2,324		197						(4,765)		(6,867)
Beginning balance at Jun. 30, 2023	13,532						21,915		2,324		23						(3,863)		(6,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	296										296
Preferred stock dividends					(16)	(11)									(16)	(11)
Share-based compensation	21						21
Other comprehensive income (loss)	(902)																(902)
Common stock dividends	(95)										(95)
Ending balance at Sep. 30, 2023	12,825						21,936		2,324		197						(4,765)		(6,867)
Beginning 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]
Net income	808										808
Preferred stock dividends					(48)	(35)									(48)	(35)
Share-based compensation	126						126
Other comprehensive income (loss)	423																423
Common stock repurchases	(31)																		(31)
Common stock dividends	(282)										(282)
Ending balance at Sep. 30, 2024	14,725						22,101		2,324		595						(3,393)		(6,902)
Beginning balance at Jun. 30, 2024	13,851						22,077		2,324		360						(4,009)		(6,901)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	357										357
Preferred stock dividends					$ (16)	$ (11)									$ (16)	$ (11)
Share-based compensation	24						24
Other comprehensive income (loss)	616																616
Common stock repurchases	(1)																		(1)
Common stock dividends	(95)										(95)
Ending balance at Sep. 30, 2024	$ 14,725						$ 22,101		$ 2,324		$ 595						$ (3,393)		$ (6,902)

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