Parent Company (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Non-interest revenues
Total non-interest revenues	$ 42,967	$ 34,630	$ 28,102
Interest income	12,658	9,033	10,083
Interest expense	2,763	1,283	2,098
Total revenues net of interest expense	52,862	42,380	36,087
Expenses
Salaries and employee benefits	7,252	6,240	5,718
Other	6,481	4,817	5,325
Total expenses	41,095	33,110	27,061
Income tax provision (benefit)	2,071	2,629	1,161
Net income	7,514	8,060	3,135
Net unrealized pension and other postretirement benefits, net of tax	52	155	(150)
Comprehensive income	7,249	8,010	2,977
Parent Company
Non-interest revenues
Processed revenue	388	343	480
Total non-interest revenues	388	343	480
Interest income	614	96	228
Interest expense	857	482	630
Total revenues net of interest expense	145	(43)	78
Expenses
Salaries and employee benefits	408	359	333
Other	372	346	562
Total expenses	780	705	895
Pretax income	(635)	(748)	(817)
Income tax provision (benefit)	(244)	(248)	(236)
Net loss before equity in net income of subsidiaries and affiliates	(391)	(500)	(581)
Equity in net income of subsidiaries and affiliates	7,905	8,560	3,716
Net income	7,514	8,060	3,135
Net unrealized pension and other postretirement benefits, net of tax	10	151	(91)
Other comprehensive income (loss)	(275)	(201)	(67)
Comprehensive income	$ 7,249	$ 8,010	$ 2,977