Other Assets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Other Assets [Abstract]
Securities borrowed	$ 13,035	$ 18,524
Derivative instruments, net	4,771	4,753
Bank-owned life insurance	3,442	3,395
Investments in joint ventures and other unconsolidated entities	2,696	2,899
Collateral, net	1,779	874
Receivable for securities settlement	1,368	336
Right-of-use assets	802	858
Accounts receivable	715	432
Prepaid expenses	446	395
Income taxes receivable	293	309
Deferred tax assets, net of valuation allowance	199	216
Deposits with clearing organizations	58	58
Other(3)	891	962
Total	30,495	34,011
Other assets, advances	$ 600	$ 670