Deposits - Noninterest and Interest-bearing (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
U.S. offices
Noninterest-bearing	$ 400,831	$ 392,721
Interest-bearing (included $12,245 and $10,916 at fair value)	737,949	663,004
Total deposits in U.S. offices	1,138,780	1,055,725
Non-U.S. offices
Noninterest-bearing	14,764	14,489
Interest-bearing (included $1,667 and $1,600 at fair value)	221,635	209,501
Total deposits in non-U.S. offices	236,399	223,990
Total deposits	1,375,179	1,279,715
Fair value
U.S. offices
Interest-bearing, fair value	12,245	10,916
Non-U.S. offices
Interest-bearing, fair value	$ 1,667	$ 1,600