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GM Financial Receivables and Transactions - Summary of Finance Receivables (Details) - GM Financial - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Finance Receivables [Line Items]
GM Financial receivables	$ 87,547	$ 86,463
Less: allowance for loan losses	(2,355)	(2,344)	$ (2,152)	$ (2,096)
GM Financial receivables, net	85,193	84,119
Retail Finance Receivables
Finance Receivables [Line Items]
GM Financial receivables	73,230	72,729	$ 67,704
Less: allowance for loan losses	(2,320)	(2,308)
GM Financial receivables, net	70,911	70,421
Commercial Finance Receivables
Finance Receivables [Line Items]
GM Financial receivables	14,317	13,734
Less: allowance for loan losses	(35)	(36)
GM Financial receivables, net	14,282	13,698
Dealer cash management balance	2,800	2,600
Commercial Finance Receivables | Dealer Financing
Finance Receivables [Line Items]
GM Financial receivables	13,939	13,257
GM Financial receivables, net	13,900	13,300
Commercial Finance Receivables | Other Financing
Finance Receivables [Line Items]
GM Financial receivables, net	378	476
Level 2
Finance Receivables [Line Items]
Fair value of GM Financial receivables	14,282	13,698
Level 3
Finance Receivables [Line Items]
Fair value of GM Financial receivables	$ 71,427	$ 70,911

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