Securitizations and Variable Interest Entities (Schedule of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together) (Details) - Whole-loan sales - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Total amount	$ 133	$ 4
Amount 60 days or more past due	3	0
Consumer automotive
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Total amount	57	0
Amount 60 days or more past due	0	0
Consumer other
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Total amount	76	4
Amount 60 days or more past due	$ 3	$ 0