Finance Receivables and Loans, Net - Schedule of Purchases of Financing Receivables and Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total purchases of finance receivables and loans	$ 3,264	$ 3,892
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total purchases of finance receivables and loans	3,243	3,861
Consumer | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total purchases of finance receivables and loans	21	21
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total purchases of finance receivables and loans	$ 0	$ 10