Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,125	$ 2,020	$ 4,022	[1]	$ 5,215	[1]
Change in net unrealized gain (loss) on available for sale securities:
Net unrealized gain (loss) excluding transfers to held to maturity	(720)	(9,493)	446		(29,299)
Reclassification of net unrealized loss transferred to held to maturity	0	0	0		2,429
Other reclassifications included in other revenue	24	16	44		(1)
Change in net unrealized gain (loss) on held to maturity securities:
Reclassification of net unrealized loss transferred from available for sale	0	0	0		(2,429)
Amortization of amounts previously recorded upon transfer to held to maturity from available for sale	645	83	1,896		297
Other	0	0	(9)		0
Other comprehensive income (loss), before tax	(51)	(9,394)	2,377		(29,003)
Income tax effect	29	2,264	(508)		6,960
Other comprehensive income (loss), net of tax	(22)	(7,130)	1,869		(22,043)
Comprehensive Income (Loss)	$ 1,103	$ (5,110)	$ 5,891		$ (16,828)

[1] Certain prior period amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.