Deposits - Noninterest and Interest-bearing (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
U.S. offices
Noninterest-bearing (included $47,974 and $75,393 at fair value)	$ 611,334	$ 643,748
Interest-bearing (included $747 and $573 at fair value)	1,326,489	1,303,100
Total deposits in U.S. offices	1,937,823	1,946,848
Non-U.S. offices
Noninterest-bearing (included $2,272 and $1,737 at fair value)	31,607	23,097
Interest-bearing (included $291 and $681 at fair value)	461,342	430,743
Total deposits in non-U.S. offices	492,949	453,840
Total deposits	2,430,772	2,400,688
Fair value
U.S. offices
Noninterest-bearing (included $47,974 and $75,393 at fair value)	47,974	75,393
Interest-bearing, fair value	747	573
Non-U.S. offices
Noninterest-bearing (included $2,272 and $1,737 at fair value)	2,272	1,737
Interest-bearing, fair value	$ 291	$ 681