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GM Financial Receivables and Transactions - Intercompany Transactions (Details) - GM Financial - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Financing receivable, net	$ 78,641		$ 78,641		$ 74,214
Common stock dividends declared and paid	450	$ 750	900	$ 750
Eliminations
Related Party Transaction [Line Items]
Subvention receivable	570		570		469
Interest subvention earned on finance receivables	308	235	587	455
Leased vehicle subvention earned	389	500	782	1,047
Cash payments	915	$ 561	1,700	$ 1,000
Retail Finance Receivables
Related Party Transaction [Line Items]
Financing receivable, net	67,557		67,557		63,260
Retail Finance Receivables | Eliminations
Related Party Transaction [Line Items]
Financing receivable, net	222		222		113
Commercial Finance Receivables
Related Party Transaction [Line Items]
Financing receivable, net	11,084		11,084		10,954
Commercial Finance Receivables | Eliminations
Related Party Transaction [Line Items]
Financing receivable, net	142		142		187
Commercial loan funding payable	$ 42		$ 42		$ 105

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