Other Assets (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Other Assets [Abstract]
Receivable - securities lending	$ 22,553	$ 21,204
Bank-owned life insurance	3,176	3,158
Derivative instruments, net	3,016	7,321
Investments in joint ventures and other unconsolidated entities	2,088	2,363
Receivable for securities settlement	1,510	40
Collateral, net	586	2,236
Prepaid expenses	457	333
Accounts receivable	317	886
Deferred tax assets, net of valuation allowance	214	210
Income taxes receivable	155	106
Deposits with clearing organizations	108	132
Other	317	339
Total	$ 34,497	$ 38,328