Other Assets - Components of Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Assets [Abstract]
Collateral deposits, net	$ 21,465	$ 18,134
Derivative instruments, net	4,777	7,934
Bank-owned life insurance	3,078	2,402
Investments in joint ventures and other unconsolidated entities	2,034	1,798
Accounts receivable	1,018	513
Receivable for securities settlement	311	218
Prepaid expenses	284	259
Deferred tax assets, net of valuation allowance	182	214
Income taxes receivable	154	396
Deposits with clearing organizations	127	197
Other	510	535
Total	$ 33,940	$ 32,600