Deposits - Time Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Time deposits in denominations of $100,000 or more
U.S. offices	$ 64,519	$ 56,983
Non-U.S. offices	48,091	43,719
Total	112,610	$ 100,702
Maturities of interest bearing time deposits
2016	126,037
2017	3,085
2018	2,211
2019	1,611
2020	1,732
After 5 years	6,336
Total	141,012
U.S.
Maturities of interest bearing time deposits
2016	78,246
2017	2,940
2018	2,172
2019	1,564
2020	1,615
After 5 years	6,336
Total	92,873
Non-U.S.
Maturities of interest bearing time deposits
2016	47,791
2017	145
2018	39
2019	47
2020	117
After 5 years	0
Total	$ 48,139