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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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
GM Financial receivables	$ 89,841		$ 89,841		$ 86,463
Common stock dividends declared and paid	450	$ 450	900	$ 900
Eliminations
Related Party Transaction [Line Items]
Subvention receivable from GM	558		558		508
Interest subvention earned on finance receivables	346	308	680	587
Leased vehicle subvention earned	359	389	723	782
Cash payments	934	$ 915	1,700	$ 1,700
Commercial Finance Receivables
Related Party Transaction [Line Items]
GM Financial receivables	16,506		16,506		13,734
Commercial Finance Receivables | Eliminations
Related Party Transaction [Line Items]
GM Financial receivables	226		226		164
Commercial loan funding payable to GM	83		83		55
Commercial Finance Receivables | Eliminations | Cruise
Related Party Transaction [Line Items]
GM Financial receivables	$ 395		$ 395		$ 353

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