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Stockholders' Equity - Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Before Tax
Net unrealized gains (losses) on securities available for sale	$ 1,416	$ (1,115)
Net unrealized gains (losses) on hedging relationships	886	(542)
Foreign currency translation adjustments	(5)	3
Other	0	1
Other comprehensive income (loss)	2,297	(1,653)
Provision (Benefit)
Net unrealized gains (losses) on securities available for sale	345	(271)
Net unrealized gains (losses) on hedging relationships	216	(132)
Foreign currency translation adjustments	(21)	16
Other	0	0
Other comprehensive income (loss)	540	(387)
After Tax
Net unrealized gains (losses) on securities available for sale	1,071	(844)
Net unrealized gains (losses) on hedging relationships	670	(410)
Foreign currency translation adjustments	16	(13)
Other	0	1
Other comprehensive income (loss), net of tax	$ 1,757	$ (1,266)

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