Other Assets (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Other Assets [Abstract]
Securities Financing pledged assets and collateral received	$ 22,789	$ 19,404
Derivative instruments, net	6,151	4,013
Bank-owned life insurance	3,285	3,242
Investments in joint ventures and other unconsolidated entities(2)	2,791	2,259
Collateral, net	2,263	473
Receivable for securities settlement	813	188
Prepaid expenses	425	364
Accounts receivable	339	348
Deposits with clearing organizations	131	120
Deferred tax assets, net of valuation allowance	109	113
Income taxes receivable	44	97
Other	414	397
Total	$ 39,554	$ 31,018