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GM Financial Receivables and Transactions - Summary of Finance Receivables (Details) - GM Financial - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Finance Receivables [Line Items]
GM Financial receivables, net of fees	$ 80,843		$ 76,310
Less: allowance for loan losses	(2,202)	$ (2,152)	(2,096)	$ (2,027)	$ (1,928)	$ (1,886)
GM Financial receivables, net	78,641		74,214
Retail Finance Receivables
Finance Receivables [Line Items]
GM Financial receivables, net of fees	69,722		65,322	$ 61,208
Less: allowance for loan losses	(2,166)		(2,062)
GM Financial receivables, net	67,557		63,260
Commercial Finance Receivables
Finance Receivables [Line Items]
GM Financial receivables, net of fees	11,120		10,988
Less: allowance for loan losses	(36)		(34)
GM Financial receivables, net	11,084		10,954
Dealer cash management balance	2,300		1,900
Level 2
Finance Receivables [Line Items]
Fair value of GM Financial receivables	11,084		10,954
Level 3
Finance Receivables [Line Items]
Fair value of GM Financial receivables	$ 66,754		$ 62,150

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