Offsetting Arrangements - Liabilities With Offsetting Arrangements (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Offsetting Liabilities [Line Items]
Derivatives, gross amounts of recognized liabilities	$ 25,577	$ 14,261
Derivatives, gross amounts offset in statement of condition	(20,606)	(9,236)
Net Amounts of Liabilities Presented in Statement of Condition	4,971	5,025
Derivative, net amount	3,871	4,268
Cash collateral received	(6,390)	(1,614)
Derivatives, cash and collateral securities netting, cash and securities provided	(1,100)	(757)
Derivatives, cash and collateral securities netting, net	(7,490)	(2,371)
Resale agreements and securities lending, gross amounts of recognized liabilities	260,553	273,785
Resale agreements and securities lending, gross amounts offset in statement of condition	(234,376)	(252,779)
Resale agreements and securities lending, net amounts of liabilities presented in statement of condition	26,177	21,006
Resale agreements and securities lending, cash and securities provided	(25,957)	(20,165)
Resale agreements and securities lending, net amount	220	841
Total derivatives and other financial instruments, gross amounts of recognized liabilities	286,130	288,046
Total derivatives and other financial instruments, gross amounts offset in statement of condition	(254,982)	(262,015)
Total derivatives and other financial instruments, net amounts of liabilities presented in statement of condition	31,148	26,031
Total derivatives and other financial instruments, cash and securities provided	(27,057)	(20,922)
Total derivatives and other financial instruments, net amount	4,091	5,109
Securities sold under repurchase agreements	969	841
Cash collateral received in connection to securities finance activities	25,210	20,170
Foreign exchange contracts
Offsetting Liabilities [Line Items]
Derivatives, gross amounts of recognized liabilities	25,416	14,097
Derivatives, gross amounts offset in statement of condition	(14,200)	(7,617)
Net Amounts of Liabilities Presented in Statement of Condition	11,216	6,480
Derivative, net amount	11,216	6,480
Interest rate contracts
Offsetting Liabilities [Line Items]
Derivatives, gross amounts of recognized liabilities	32	5
Derivatives, gross amounts offset in statement of condition	(16)	(5)
Net Amounts of Liabilities Presented in Statement of Condition	16	0
Derivative, net amount	16	0
Other derivative contracts
Offsetting Liabilities [Line Items]
Derivatives, gross amounts of recognized liabilities	129	159
Derivatives, gross amounts offset in statement of condition	0	0
Net Amounts of Liabilities Presented in Statement of Condition	129	159
Derivative, net amount	$ 129	$ 159