Offsetting Arrangements - Assets With Offsetting Arrangements (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	$ 19,707	$ 26,186
Derivatives, Gross Amounts Offset in Statement of Condition	(14,400)	(18,522)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	5,307	7,664
Derivatives, Net Amount	4,238	5,947
Derivatives, Cash collateral and securities netting, cash offset	(3,904)	(3,298)
Derivatives, Cash collateral and securities netting, Cash and Securities Received	(1,069)	(1,717)
Derivatives, Cash collateral and securities netting, Net Amount	(4,973)	(5,015)
Resale agreements and securities borrowing, Gross Amounts of Recognized Assets	230,384	125,797
Resale agreements and securities borrowing, Gross Amounts Offset in Statement of Condition	(200,561)	(104,093)
Resale agreements and securities borrowing, Net Amounts of Assets Presented in Statement of Condition	29,823	21,704
Resale agreements and securities borrowing, Cash and Securities Received	(28,016)	(20,960)
Resale agreements and securities borrowing, Net Amount	1,807	744
Total derivatives and other financial instruments, Gross Amounts of Recognized Assets	250,091	151,983
Total derivatives and other financial instruments, Gross Amounts Offset in Statement of Condition	(214,961)	(122,615)
Total derivatives and other financial instruments, Net Amounts of Assets Presented in Statement of Condition	35,130	29,368
Total derivatives and other financial instruments, Cash and Securities Received	(29,085)	(22,677)
Total derivatives and other financial instruments, Net Amount	6,045	6,691
Securities purchased under resale agreements	6,692	5,215
Cash collateral provided for securities borrowing	23,130	16,490
Foreign exchange contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	19,694	26,186
Derivatives, Gross Amounts Offset in Statement of Condition	(10,496)	(15,224)
Derivatives, Net Amounts of Assets Presented in Statement of Condition	9,198	10,962
Derivatives, Net Amount	9,198	10,962
Interest rate contracts
Offsetting Assets [Line Items]
Derivatives, Gross Amounts of Recognized Assets	13	0
Derivatives, Gross Amounts Offset in Statement of Condition	0	0
Derivatives, Net Amounts of Assets Presented in Statement of Condition	13	0
Derivatives, Net Amount	$ 13	$ 0