Noninterest Revenue and Noninterest Expense - Asset Management Fees (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Noninterest Income (Expense) [Abstract]
Investment management fees	$ 4,381	$ 3,825	$ 12,650	$ 10,910
All other asset management fees	98	79	277	233
Total asset management fees	$ 4,479	$ 3,904	$ 12,927	$ 11,143