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GM Financial Receivables and Transactions - Intercompany Transactions (Details) - GM Financial - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party Transactions [Line Items]
Financing receivable	$ 95,294	$ 86,463
Common stock dividends declared and paid	1,800	1,800	$ 1,700
Commercial Portfolio Segment
Related Party Transactions [Line Items]
Financing receivable	19,228	13,734
Eliminations/ Reclassifications
Related Party Transactions [Line Items]
Subvention receivable from GM	360	508
Interest subvention earned on finance receivables	1,385	1,234	984
Leased vehicle subvention earned	1,511	1,537	1,916
Cash payments	3,800	3,500	$ 2,400
Eliminations/ Reclassifications | Commercial Portfolio Segment
Related Party Transactions [Line Items]
Financing receivable	279	164
Commercial loan funding payable to GM	100	55
Eliminations/ Reclassifications | Commercial Portfolio Segment | Cruise
Related Party Transactions [Line Items]
Financing receivable	$ 395	$ 353

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