Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Assets [Abstract]
Securities borrowed	$ 18,330	$ 18,524
Derivative instruments, net	5,804	4,753
Bank-owned life insurance	3,479	3,395
Investments in joint ventures and other unconsolidated entities	3,095	2,899
Collateral, net	2,713	874
Right-of-use assets	720	858
Prepaid expenses	383	395
Accounts receivable	379	432
Income taxes receivable	367	309
Deferred tax assets, net of valuation allowance(2)	233	216
Receivable for securities settlement	117	336
Deposits with clearing organizations	58	58
Other	832	962
Total	$ 36,510	$ 34,011