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GM Financial Receivables and Transactions - Allowance for Loan Losses (Details) - GM Financial - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses at beginning of period	$ 2,027	$ 1,850	$ 1,886	$ 1,978
Provision for loan losses	180	141	500	174
Charge-offs	(289)	(207)	(811)	(664)
Recoveries	173	133	511	429
Effect of foreign currency	(4)	(14)	0	(14)
Allowance for loan losses at end of period	$ 2,086	$ 1,903	$ 2,086	$ 1,903

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- Definition

Amount of foreign currency translation gain (loss) which decreases (increases) allowance for credit loss on financing receivable. Excludes net investment in lease.

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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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