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Inventories (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Inventory Disclosure [Abstract] |  |
Total productive material, supplies and work in process | $ 6,444 | $ 7,422
Finished product, including service parts | 8,120 | 9,039
Total inventories | 14,564 | 16,461
Inventory [Line Items] |  |
Inventory allowance | 2,000 | 2,200
Electric Vehicle Inventory |  |
Inventory [Line Items] |  |
Inventory allowance | $ 1,400 | $ 1,900

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