Loans, Lending Commitments and Related Allowance for Credit Losses - Loans by Interest Rate Type (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	$ 60,911	$ 56,492
Floating or Adjustable Rate	218,315	182,727
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	1	0
Floating or Adjustable Rate	14,478	16,071
Secured lending facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	525	0
Floating or Adjustable Rate	70,440	51,349
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	327	0
Floating or Adjustable Rate	8,032	9,041
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	32,377	31,014
Floating or Adjustable Rate	40,031	35,724
Securities-based lending and Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fixed Rate	27,681	25,478
Floating or Adjustable Rate	$ 85,334	$ 70,542