Other Assets - Components of Other Assets (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other Assets [Abstract]
Collateral deposits, net	$ 23,065	$ 21,465
Derivative instruments, net	5,813	4,777
Bank-owned life insurance	3,098	3,078
Investments in joint ventures and other unconsolidated entities	2,191	2,034
Accounts receivable	1,240	1,018
Prepaid expenses	385	284
Receivable for securities settlement	345	311
Deferred tax assets, net of valuation allowance	221	182
Income taxes receivable	161	154
Deposits with clearing organizations	133	127
Other	431	473
Total	$ 37,083	$ 33,903