Finance Receivables and Loans, Net - Schedule of Sales of Financing Receivables and Loans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total sales and transfers	$ 339	$ 11	$ 1,729	$ 12
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total sales and transfers	0	0	1,108	0
Consumer | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total sales and transfers	208	0	325	1
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total sales and transfers	$ 131	$ 11	$ 296	$ 11