Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 1,362	$ 1,603
Change in net unrealized gain (loss) on available for sale securities:
Net unrealized gain (loss)	139	1,849
Other reclassifications included in other revenue	10	9
Change in net unrealized gain (loss) on held to maturity securities:
Amortization of amounts previously recorded upon transfer to held to maturity from available for sale	564	609
Other	(8)	(8)
Other comprehensive income (loss), before tax	705	2,459
Income tax effect	(150)	(528)
Other comprehensive income (loss), net of tax	555	1,931
Comprehensive Income (Loss)	$ 1,917	$ 3,534