Offsetting Arrangements - Assets With Offsetting Arrangements (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	$ 20,928	$ 15,187
Derivatives, Gross Amounts Offset in Statement of Condition	(14,142)	(11,079)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	6,786	4,108
Derivatives, Net Amount	5,974	3,385
Derivatives, Cash collateral and securities netting, cash offset	(1,742)	(1,966)
Derivatives, Cash collateral and securities netting, Cash and Securities Received	(812)	(723)
Derivatives, Cash collateral and securities netting, Net Amount	(2,554)	(2,689)
Resale agreements and securities borrowing, Gross Amounts of Recognized Assets	106,690	102,375
Resale agreements and securities borrowing, Gross Amounts Offset in Statement of Condition	(81,779)	(77,063)
Resale agreements and securities borrowing, Net Amounts of Assets Presented in Statement of Condition	24,911	25,312
Resale agreements and securities borrowing, Cash and Securities Received	(24,658)	(25,096)
Resale agreements and securities borrowing, Net Amount	253	216
Total derivatives and other financial instruments, Gross Amounts of Recognized Assets	127,618	117,562
Total derivatives and other financial instruments, Gross Amounts Offset in Statement of Condition	(95,921)	(88,142)
Total derivatives and other financial instruments, Net Amounts of Assets Presented in Statement of Condition	31,697	29,420
Total derivatives and other financial instruments, Cash and Securities Received	(25,470)	(25,819)
Total derivatives and other financial instruments, Net Amount	6,227	3,601
Securities purchased under resale agreements	803	3,012
Cash collateral provided for securities borrowing	24,110	22,300
Foreign exchange contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	20,919	15,185
Derivatives, Gross Amounts Offset in Statement of Condition	(12,400)	(9,113)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	8,519	6,072
Derivatives, Net Amount	8,519	6,072
Interest rate contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	9	2
Derivatives, Gross Amounts Offset in Statement of Condition	0	0
Derivatives, Net Amounts of Assets Presented in Statement of Condition	9	2
Derivatives, Net Amount	$ 9	$ 2