Finance Receivables - Finance Receivables, net (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan losses	$ (2,152)	$ (2,096)
Total finance receivables, net	76,178	74,514
Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	10,597	11,254
Level 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	65,165	62,150
Retail Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net of fees	67,704	65,322	$ 59,503
Less: allowance for loan losses	(2,123)	(2,062)	$ (1,884)	$ (1,839)
Total finance receivables, net	65,581	63,260
Commercial Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net of fees	10,627	11,288
Less: allowance for loan losses	(29)	(34)
Total finance receivables, net	10,597	11,254
Dealer cash management balances	$ 2,200	$ 1,900