Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Assets [Abstract]
Securities borrowed	$ 13,886	$ 18,524
Derivative instruments, net	5,715	4,753
Bank-owned life insurance	3,459	3,395
Investments in joint ventures and other unconsolidated entities	3,186	2,899
Collateral, net	2,176	874
Right-of-use assets	789	858
Prepaid expenses	411	395
Accounts receivable	377	432
Receivable for securities settlement	273	336
Income taxes receivable	267	309
Deferred tax assets, net of valuation allowance	199	216
Deposits with clearing organizations	118	58
Other	1,205	962
Total	32,061	34,011
Other assets, advances	$ 900	$ 670