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GM Financial Receivables and Transactions - Summary of Finance Receivables (Details) - GM Financial - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | $ 87,547 | $ 86,463 |  |
Less: allowance for loan losses | (2,355) | (2,344) | $ (2,152) | $ (2,096)
GM Financial receivables, net | 85,193 | 84,119 |  |
Retail Finance Receivables |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | 73,230 | 72,729 | $ 67,704 |
Less: allowance for loan losses | (2,320) | (2,308) |  |
GM Financial receivables, net | 70,911 | 70,421 |  |
Commercial Finance Receivables |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | 14,317 | 13,734 |  |
Less: allowance for loan losses | (35) | (36) |  |
GM Financial receivables, net | 14,282 | 13,698 |  |
Dealer cash management balance | 2,800 | 2,600 |  |
Commercial Finance Receivables | Dealer Financing |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables | 13,939 | 13,257 |  |
GM Financial receivables, net | 13,900 | 13,300 |  |
Commercial Finance Receivables | Other Financing |  |  |  |
Finance Receivables [Line Items] |  |  |  |
GM Financial receivables, net | 378 | 476 |  |
Level 2 |  |  |  |
Finance Receivables [Line Items] |  |  |  |
Fair value of GM Financial receivables | 14,282 | 13,698 |  |
Level 3 |  |  |  |
Finance Receivables [Line Items] |  |  |  |
Fair value of GM Financial receivables | $ 71,427 | $ 70,911 |  |

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