Consolidated Securitization Vehicles and Other Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Unconsolidated VIEs, individual investments	$ 881		$ 881		$ 795
Variable interest entity, reporting entity involvement, maximum loss exposure, amount	840		840		772
Minimum | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Unconsolidated VIEs, individual investments	1		1		1
Maximum | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Unconsolidated VIEs, individual investments	22		22		$ 20
Subprime | Residential Mortgage
Variable Interest Entity [Line Items]
Financing receivable, purchases	$ 468	$ 1,400	$ 468	$ 2,600