Noninterest Revenue and Noninterest Expense - Commissions and Other Fees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Noninterest Income (Expense) [Abstract]
Brokerage commissions and fees	$ 3,119	$ 2,820	$ 2,831
Administration fees	2,526	2,310	2,348
All other commissions and fees	1,885	1,706	1,402
Total commissions and other fees	$ 7,530	$ 6,836	$ 6,581