Noninterest Revenue and Noninterest Expense - Asset Management Fees (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Noninterest Income (Expense) [Abstract]
Investment management fees	$ 5,408	$ 4,603
All other asset management fees	107	97
Total asset management fees	$ 5,515	$ 4,700