Other Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other Assets [Abstract]
Securities borrowed	$ 12,585	$ 18,524
Derivative instruments, net	9,713	4,753
Bank-owned life insurance	3,418	3,395
Investments in joint ventures and other unconsolidated entities	2,837	2,899
Collateral, net	2,729	874
Receivable for securities settlement	1,951	336
Right-of-use assets	815	858
Accounts receivable	706	432
Prepaid expenses	452	395
Deferred tax assets, net of valuation allowance	206	216
Income taxes receivable	136	309
Deposits with clearing organizations	58	58
Other(3)	1,294	962
Total	36,900	34,011
Other assets, advances	$ 1,070	$ 670