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Debt - Interest Expense and LT Debt Maturities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |
Total interest expense | $ 5,596 | $ 3,868 | $ 3,496
2024 | 39,065 |  |
2025 | 25,615 |  |
2026 | 15,142 |  |
2027 | 10,596 |  |
2028 | 7,995 |  |
Thereafter | 25,081 |  |
Total | 123,494 |  |
Automotive |  |  |
Debt Instrument [Line Items] |  |  |
Automotive interest expense | 911 | 987 | 950
2024 | 428 |  |
2025 | 2,644 |  |
2026 | 93 |  |
2027 | 1,826 |  |
2028 | 831 |  |
Thereafter | 11,082 |  |
Total | 16,905 |  |
GM Financial |  |  |
Debt Instrument [Line Items] |  |  |
Financing interest expense | 4,685 | $ 2,881 | $ 2,546
2024 | 38,637 |  |
2025 | 22,971 |  |
2026 | 15,049 |  |
2027 | 8,770 |  |
2028 | 7,164 |  |
Thereafter | 13,999 |  |
Total | $ 106,590 |  |

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