Loans, Lending Commitments and Related Allowance for Credit Losses - Nonaccrual Loans Held for Investment before Allowance (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 735	$ 893
Nonaccrual loans without an ACL	112	356
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	77	34
Secured lending facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	110	375
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	287	195
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	119	138
Securities-based lending and Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 142	$ 151