Securitizations and Variable Interest Entities - Schedule of Cost and Fair Value of Securities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Fair Value	$ 401	$ 382
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Amortized Cost	411	375
Fair Value	401	382
Rated notes | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Amortized Cost	314	282
Fair Value	300	282
Certificates and other assets | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Amortized Cost	97	93
Fair Value	$ 101	$ 100