Securitizations and Variable Interest Entities (Schedule of Cash Flows with Nonconsolidated Special-Purpose Entities) (Details) - Off-balance sheet variable interest entities - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Total	$ 563	$ 51
Automotive | Consumer
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Cash proceeds from transfers completed during the period	477	2
Servicing fees	6	0
Consumer other | Consumer
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Cash proceeds from transfers completed during the period	75	45
Servicing fees	$ 5	$ 4