Finance Receivables - Allowance for Loan Losses (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for retail loan losses beginning balance	$ 1,886
Provision for loan losses	122	$ (26)
Allowance for retail loan losses ending balance	1,928
Retail Finance Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for retail loan losses beginning balance	1,839	1,915
Provision for loan losses	126	(13)
Charge-offs	(275)	(253)
Recoveries	177	149
Foreign currency translation	18	(14)
Allowance for retail loan losses ending balance	$ 1,884	$ 1,784

Amount of foreign currency translation gain (loss) which (increases) decreases allowance for credit loss on financing receivable.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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