Financial Instruments Subject to Off-Balance Sheet Credit Risk - Narrative (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Available for sale securities	[1]	$ 107,646	$ 147,871
Asset Pledged as Collateral
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Available for sale securities	[1]	1,733	41
Asset Pledged as Collateral | Interest rate swaps
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Available for sale securities		195
Securities Financing Transaction, Fair Value
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair value of borrowed securities from other broker-dealers to fulfill short sales by clients		$ 1,500	$ 685

[1] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.