Noninterest Revenue and Noninterest Expense - Asset Management Fees (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Noninterest Income (Expense) [Abstract]
Investment management fees	$ 3,390	$ 3,562
All other asset management fees	75	90
Total asset management fees	$ 3,465	$ 3,652