Offsetting Arrangements - Assets With Offsetting Arrangements (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	$ 29,468	$ 19,707
Derivatives, Gross Amounts Offset in Statement of Condition	(18,285)	(14,400)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	11,183	5,307
Derivatives, Net Amount	9,986	4,238
Derivatives, Cash collateral and securities netting, cash offset	(1,860)	(3,904)
Derivatives, Cash collateral and securities netting, Cash and Securities Received	(1,197)	(1,069)
Derivatives, Cash collateral and securities netting, Net Amount	(3,057)	(4,973)
Resale agreements and securities borrowing, Gross Amounts of Recognized Assets	276,151	230,384
Resale agreements and securities borrowing, Gross Amounts Offset in Statement of Condition	(232,021)	(200,561)
Resale agreements and securities borrowing, Net Amounts of Assets Presented in Statement of Condition	44,130	29,823
Resale agreements and securities borrowing, Cash and Securities Received	(42,589)	(28,016)
Resale agreements and securities borrowing, Net Amount	1,541	1,807
Total derivatives and other financial instruments, Gross Amounts of Recognized Assets	305,619	250,091
Total derivatives and other financial instruments, Gross Amounts Offset in Statement of Condition	(250,306)	(214,961)
Total derivatives and other financial instruments, Net Amounts of Assets Presented in Statement of Condition	55,313	35,130
Total derivatives and other financial instruments, Cash and Securities Received	(43,786)	(29,085)
Total derivatives and other financial instruments, Net Amount	11,527	6,045
Securities purchased under resale agreements	6,679	6,692
Cash collateral provided for securities borrowing	37,450	23,130
Foreign exchange contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	29,439	19,694
Derivatives, Gross Amounts Offset in Statement of Condition	(16,424)	(10,496)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	13,015	9,198
Derivatives, Net Amount	13,015	9,198
Interest rate contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	28	13
Derivatives, Gross Amounts Offset in Statement of Condition	(1)	0
Derivatives, Net Amounts of Assets Presented in Statement of Condition	27	13
Derivatives, Net Amount	27	$ 13
Other derivative contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	1
Derivatives, Gross Amounts Offset in Statement of Condition	0
Derivatives, Net Amounts of Assets Presented in Statement of Condition	1
Derivatives, Net Amount	$ 1