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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, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |  |  |
GM Financial receivables | $ 92,558 |  | $ 92,558 |  | $ 95,294
Common stock dividends declared and paid | 350 | $ 450 | 1,100 | $ 1,400 |
Commercial Finance Receivables |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
GM Financial receivables | 16,700 |  | 16,700 |  | 19,228
Eliminations |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Subvention receivable from GM | 544 |  | 544 |  | 360
Interest subvention earned on finance receivables | 344 | 345 | 1,075 | 1,026 |
Leased vehicle subvention earned | 461 | 385 | 1,313 | 1,108 |
Cash payments | 856 | $ 1,200 | 2,500 | $ 2,900 |
Eliminations | Commercial Finance Receivables |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
GM Financial receivables | 381 |  | 381 |  | 279
Commercial loan funding payable to GM | $ 102 |  | $ 102 |  | $ 100

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