Securitizations and Variable Interest Entities (Schedule of Cash Flows with Nonconsolidated Special-Purpose Entities) (Details) - Off-balance sheet variable interest entities - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Total	$ 1,280	$ 389	$ 4
Automotive | Consumer
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Cash proceeds from transfers completed during the period	1,131	238	0
Cash flows received on retained interests in securitization entities	4	0	0
Servicing fees	19	1	0
Other cash flows	1	0	0
Consumer other | Consumer
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Cash proceeds from transfers completed during the period	117	137	4
Servicing fees	$ 8	$ 13	$ 0