Collateralized Transactions - Offsetting of Certain Collateralized Transactions (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Securities purchased under agreements to resell
Gross Amounts	$ 238,485	$ 197,486
Amounts Offset	(110,718)	(77,487)
Balance Sheet Net Amounts	127,767	119,999
Amounts not offset	(123,988)	(106,896)
Net Amounts	3,779	13,103
Securities borrowed
Gross Amounts	164,657	139,395
Amounts Offset	(13,662)	(9,682)
Balance Sheet Net Amounts	150,995	129,713
Amounts not offset	(143,492)	(124,028)
Net Amounts	7,503	5,685
Securities sold under agreements to repurchase
Gross Amounts	170,786	139,675
Amounts Offset	(110,718)	(77,487)
Balance Sheet Net Amounts	60,068	62,188
Amounts not offset	(53,563)	(53,692)
Net Amounts	6,505	8,496
Securities loaned
Gross Amounts	27,884	21,981
Amounts Offset	(13,662)	(9,682)
Balance Sheet Net Amounts	14,222	12,299
Amounts not offset	(13,930)	(12,019)
Net Amounts	292	280
Net amounts for which master netting agreements are not in place or may not be legally enforceable
Securities purchased under agreements to resell	2,772	12,514
Securities borrowed	849	1,041
Securities sold under agreements to repurchase	5,010	8,295
Securities loaned	$ 151	$ 139