Offsetting Arrangements - Assets With Offsetting Arrangements (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	$ 14,259	$ 29,468
Derivatives, Gross Amounts Offset in Statement of Condition	(10,104)	(18,285)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	4,155	11,183
Derivatives, Net Amount	3,199	9,986
Derivatives, Cash collateral and securities netting, cash offset	(2,481)	(1,860)
Derivatives, cash collateral and securities netting, cash and securities received	(956)	(1,197)
Derivatives, Cash collateral and securities netting, Net Amount	(3,437)	(3,057)
Resale agreements and securities borrowing, Gross Amounts of Recognized Assets	297,824	276,151
Resale agreements and securities borrowing, Gross Amounts Offset in Statement of Condition	(252,779)	(232,021)
Resale agreements and securities borrowing, Net Amounts of Assets Presented in Statement of Condition	45,045	44,130
Resale agreements and securities borrowing, Cash and Securities Received	(42,683)	(42,589)
Resale agreements and securities borrowing, Net Amount	2,362	1,541
Total derivatives and other financial instruments, Gross Amounts of Recognized Assets	312,083	305,619
Total derivatives and other financial instruments, Gross Amounts Offset in Statement of Condition	(262,883)	(250,306)
Total derivatives and other financial instruments, Net Amounts of Assets Presented in Statement of Condition	49,200	55,313
Total derivatives and other financial instruments, Cash and Securities Received	(43,639)	(43,786)
Total derivatives and other financial instruments, Net Amount	5,561	11,527
Securities purchased under resale agreements	6,812	6,679
Cash collateral provided for securities borrowing	38,240	37,450
Foreign exchange contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	14,224	29,439
Derivatives, Gross Amounts Offset in Statement of Condition	(7,618)	(16,424)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	6,606	13,015
Derivatives, Net Amount	6,606	13,015
Interest rate contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	34	28
Derivatives, Gross Amounts Offset in Statement of Condition	(5)	(1)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	29	27
Derivatives, Net Amount	29	27
Other derivative contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	1	1
Derivatives, Gross Amounts Offset in Statement of Condition	0	0
Derivatives, Net Amounts of Assets Presented in Statement of Condition	1	1
Derivatives, Net Amount	$ 1	$ 1