Deposits - Noninterest and Interest-bearing (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
U.S. offices
Noninterest-bearing (included $77,571 and $75,393 at fair value)	$ 657,651	$ 643,748
Interest-bearing (included $563 and $573 at fair value)	1,311,857	1,303,100
Total deposits in U.S. offices	1,969,508	1,946,848
Non-U.S. offices
Noninterest-bearing (included $1,991 and $1,737 at fair value)	24,109	23,097
Interest-bearing (included $453 and $681 at fair value)	434,792	430,743
Total deposits in non-U.S. offices	458,901	453,840
Total deposits	2,428,409	2,400,688
Fair value
U.S. offices
Noninterest-bearing (included $77,571 and $75,393 at fair value)	77,571	75,393
Interest-bearing, fair value	563	573
Non-U.S. offices
Noninterest-bearing (included $1,991 and $1,737 at fair value)	1,991	1,737
Interest-bearing, fair value	$ 453	$ 681