Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Securities borrowed	$ 18,524	$ 19,575
Derivative instruments, net	4,753	5,189
Bank-owned life insurance	3,395	3,323
Investments in joint ventures and other unconsolidated entities	2,899	2,882
Collateral, net	874	1,354
Right-of-use assets	858
Accounts receivable	432	308
Prepaid expenses	395	493
Receivable for securities settlement	336	531
Income taxes receivable	309	129
Deferred tax assets, net of valuation allowance	216	113
Deposits with clearing organizations	58	58
Other	962	834
Total	$ 34,011	$ 34,789