Loans, Lending Commitments and Related Allowance for Credit Losses - Loans by Interest Rate Type (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	$ 54,025	$ 52,997
Floating or Adjustable Rate	175,397	166,812
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	0	0
Floating or Adjustable Rate	17,898	18,620
Secured lending facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	0	0
Floating or Adjustable Rate	48,438	42,659
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	142	141
Floating or Adjustable Rate	9,235	8,746
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	29,911	28,934
Floating or Adjustable Rate	33,251	31,464
Securities-based lending and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	23,972	23,922
Floating or Adjustable Rate	$ 66,575	$ 65,323