Noninterest Revenue and Noninterest Expense - Commissions and Other Fees (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Noninterest Income (Expense) [Abstract]
Brokerage commissions and fees	$ 917	$ 785	$ 2,765	$ 2,336
Administration fees	713	660	2,037	1,874
All other commissions and fees	574	491	1,629	1,455
Total commissions and other fees	$ 2,204	$ 1,936	$ 6,431	$ 5,665