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Debt - Interest Expense and LT Debt Maturities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Instrument [Line Items] |  |  |
Total interest expense | $ 6,876 | $ 5,596 | $ 3,868
2025 | 39,531 |  |
2026 | 24,228 |  |
2027 | 21,160 |  |
2028 | 12,400 |  |
2029 | 11,191 |  |
Thereafter | 23,247 |  |
Total | 131,758 |  |
Automotive |  |  |
Debt Instrument [Line Items] |  |  |
Automotive interest expense | 846 | 911 | 987
2025 | 2,143 |  |
2026 | 99 |  |
2027 | 1,830 |  |
2028 | 833 |  |
2029 | 1,051 |  |
Thereafter | 9,998 |  |
Total | 15,955 |  |
GM Financial |  |  |
Debt Instrument [Line Items] |  |  |
Financing interest expense | 6,030 | $ 4,685 | $ 2,881
2025 | 37,388 |  |
2026 | 24,129 |  |
2027 | 19,330 |  |
2028 | 11,567 |  |
2029 | 10,140 |  |
Thereafter | 13,249 |  |
Total | $ 115,804 |  |

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