CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2023		2,000,000	466,000,000
Beginning balance at Dec. 31, 2023	$ 24,342	$ 2,014	$ 6	$ 22,250	$ 9,816	$ (5,986)	$ (3,758)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared - common stock	(197)				(197)
Dividends declared - preferred stock	$ (30)				(30)
Treasury stock purchased (in shares)	(9,244,939)		(9,000,000)
Treasury stock purchased	$ (300)					(300)
Share repurchase excise tax	(4)					(4)
Share-based compensation plans (in shares)			1,000,000
Share-based compensation plans	15			15
Employee stock purchase plan	7			7
Total comprehensive income (loss):
Net income	334				334
Other comprehensive income (loss)	(406)						(406)
Total comprehensive income (loss)	(72)				334		(406)
Ending balance (in shares) at Mar. 31, 2024		2,000,000	458,000,000
Ending balance at Mar. 31, 2024	23,761	$ 2,014	$ 6	22,272	9,923	(6,290)	(4,164)
Beginning balance (in shares) at Dec. 31, 2024		2,000,000	441,000,000
Beginning balance at Dec. 31, 2024	24,254	$ 2,113	$ 7	22,364	10,412	(7,047)	(3,595)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared - common stock	(186)				(186)
Dividends declared - preferred stock	$ (33)				(33)
Treasury stock purchased (in shares)	(4,483,894)		(4,000,000)
Treasury stock purchased	$ (200)					(200)
Share repurchase excise tax	(2)					(2)
Share-based compensation plans (in shares)			1,000,000
Share-based compensation plans	(1)			(1)
Employee stock purchase plan	7			7
Total comprehensive income (loss):
Net income	373				373
Other comprehensive income (loss)	654						654
Total comprehensive income (loss)	1,027				373		654
Ending balance (in shares) at Mar. 31, 2025		2,000,000	438,000,000
Ending balance at Mar. 31, 2025	$ 24,866	$ 2,113	$ 7	$ 22,370	$ 10,566	$ (7,249)	$ (2,941)