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GM Financial Receivables and Transactions - Finance Receivables (Details) - GM Financial - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | $ 93,618 | $ 95,294 |  |
Less: allowance for loan losses | (2,567) | (2,458) | $ (2,355) | $ (2,344)
GM Finance receivables, net | 91,052 | 92,836 |  |
Level 2 |  |  |  |
Finance Receivables [Line Items] |  |  |  |
Fair value of GM Financial receivables | 16,536 | 19,169 |  |
Level 3 |  |  |  |
Finance Receivables [Line Items] |  |  |  |
Fair value of GM Financial receivables | 75,840 | 74,729 |  |
Retail |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | 76,995 | 76,066 | $ 73,230 |
Less: allowance for loan losses | (2,479) | (2,400) |  |
GM Finance receivables, net | 74,516 | 73,667 |  |
Commercial |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | 16,623 | 19,228 |  |
Less: allowance for loan losses | (88) | (58) |  |
GM Finance receivables, net | 16,536 | 19,169 |  |
Dealer cash management balance | 3,200 | 3,400 |  |
Commercial | Dealer Financing |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | 16,104 | 18,623 |  |
Commercial | Other Financing |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | $ 519 | $ 604 |  |

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