Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Other Assets [Abstract]
Receivable - securities lending	$ 21,204	$ 20,121
Derivative instruments, net	7,321	4,777
Bank-owned life insurance	3,158	3,078
Investments in joint ventures and other unconsolidated entities	2,363	2,034
Collateral, net	2,236	1,344
Accounts receivable	886	1,018
Prepaid expenses	333	284
Deferred tax assets, net of valuation allowance	210	182
Deposits with clearing organizations	132	127
Income taxes receivable	106	154
Receivable for securities settlement	40	311
Other	339	473
Total	$ 38,328	$ 33,903