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GM Financial Receivables and Transactions - Summary of Finance Receivables (Details) - GM Financial - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finance Receivables [Line Items]
GM Financial receivables	$ 86,463	$ 76,310
Less: allowance for loan losses	(2,344)	(2,096)	$ (1,886)	$ (1,978)
GM Financial receivables	84,119	74,214
Retail Finance Receivables
Finance Receivables [Line Items]
GM Financial receivables	72,729	65,322
Less: allowance for loan losses	(2,308)	(2,062)
GM Financial receivables	70,421	63,260
Commercial Finance Receivables
Finance Receivables [Line Items]
GM Financial receivables	13,734	10,988
Less: allowance for loan losses	(36)	(34)
GM Financial receivables	13,698	10,954
Dealer cash management balances	2,600	1,900
Commercial Finance Receivables | Dealer Financing
Finance Receivables [Line Items]
GM Financial receivables	13,257	10,625
GM Financial receivables	13,300	10,600
Commercial Finance Receivables | Other Financing
Finance Receivables [Line Items]
GM Financial receivables	476	362
Level 2
Finance Receivables [Line Items]
Fair value of GM Financial receivables	13,698	10,954
Level 3
Finance Receivables [Line Items]
Fair value of GM Financial receivables	$ 70,911	$ 62,150

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