Finance Receivables - Schedule of Finance Receivables, Net (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan losses	$ (2,567)	$ (2,458)
Total finance receivables, net	91,313	93,510
Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	16,797	19,843
Level 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	75,840	74,729
Retail finance receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	76,995	76,066	$ 73,230
Less: allowance for loan losses	(2,479)	(2,400)	$ (2,320)	$ (2,308)
Total finance receivables, net	74,516	73,667
Commercial finance receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	16,885	19,901
Less: allowance for loan losses	(88)	(58)
Total finance receivables, net	16,797	19,843
Dealer cash management balances	3,200	3,400
Commercial finance receivables | Dealer Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	16,365	18,902
Commercial finance receivables | Other Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	$ 519	$ 999