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Stockholders' Equity - Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Before Tax
Net unrealized gains (losses) on securities available for sale	$ (1,036)	$ 1,183	$ (10,516)
Net unrealized gains (losses) on hedging relationships	(303)	906	(3,032)
Foreign currency translation adjustments	32	6	98
Other	9	8	(24)
Other comprehensive income (loss)	(1,298)	2,103	(13,474)
Provision (Benefit)
Net unrealized gains (losses) on securities available for sale	(261)	276	(2,543)
Net unrealized gains (losses) on hedging relationships	(76)	217	(732)
Foreign currency translation adjustments	55	(40)	97
Other	2	2	(6)
Other comprehensive income (loss)	(280)	455	(3,184)
After Tax
Net unrealized gains (losses) on securities available for sale	(775)	907	(7,973)
Net unrealized gains (losses) on hedging relationships	(227)	689	(2,300)
Foreign currency translation adjustments	(23)	46	1
Other	7	6	(18)
Other comprehensive income (loss), net of tax	$ (1,018)	$ 1,648	$ (10,290)

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