Noninterest Revenue and Noninterest Expense - Other income (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
Jan. 31, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Noninterest Income (Expense) [Abstract]
Operating lease income		$ 990	$ 706	$ 2,720	$ 2,067
Gain on Visa shares		0	0	0	7,990
First Republic-related gains	$ 588	$ 0		628
First Republic-related gains			$ 0	$ 0	$ 103
Payment related to business acquisition	$ 609

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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