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GM Financial Receivables and Transactions - Intercompany Transactions (Details) - GM Financial - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Financing receivable, net	$ 81,211		$ 81,211		$ 74,214
Common stock dividends declared and paid	450	$ 275	1,400	$ 1,000
Eliminations
Related Party Transaction [Line Items]
Subvention receivable	837		837		469
Taxes payable to GM	412		412		8
Interest subvention earned on finance receivables	319	260	906	715
Leased vehicle subvention earned	382	456	1,165	1,503
Cash payments	629	$ 732	2,300	$ 1,700
Commercial Finance Receivables
Related Party Transaction [Line Items]
Financing receivable, net	11,731		11,731		10,954
Commercial Finance Receivables | Eliminations
Related Party Transaction [Line Items]
Financing receivable, net	163		163		187
Commercial loan funding payable	62		62		105
Retail Finance Receivables
Related Party Transaction [Line Items]
Financing receivable, net	69,480		69,480		63,260
Retail Finance Receivables | Eliminations
Related Party Transaction [Line Items]
Financing receivable, net	$ 276		$ 276		$ 113

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