Finance Receivables, Net - Additional Information (Details) $ in Millions	Mar. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable accrued interest before allowance for credit loss	$ 187
Retail Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable accrued interest before allowance for credit loss	160
Dealer Products [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable accrued interest before allowance for credit loss	$ 27