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Restructuring And Other Initiatives (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at beginning of period | $ 779 | $ 520 | $ 285 | $ 352
Additions, interest accretion and other |  | 1,831 | 522 | 216
Payments |  | (1,597) | (275) | (278)
Revisions to estimates and effect of foreign currency |  | 25 | (12) | (5)
Balance at end of period |  | 779 | 520 | 285
Restructuring payments |  | 1,597 | 275 | 278
Long-lived assets |  | 80,903 | 77,950 | $ 79,044
GMNA |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges and other charges |  | 569 | 511 |
Cruise |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges and other charges |  | 529 |  |
Employee separation charges |  | 67 |  |
Non-cash pension curtailment and settlement charges |  | 250 |  |
Business exit costs |  | 212 |  |
Long-lived assets |  | 1,400 |  |
Dealer Restructuring and Employee Separation Payments | GMNA |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Payments |  | (674) | (120) |
Restructuring payments |  | 674 | $ 120 |
Dealer Restructuring and Employee Separation Payments | GMNA | Forecast |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Payments | (286) |  |  |
Restructuring payments | 286 |  |  |
Voluntary Separation Program | GMNA |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Payments |  | (820) |  |
Restructuring charges and other charges |  | 1,000 |  |
Restructuring payments |  | 820 |  |
Employee separation charges |  | 905 |  |
Non-cash pension curtailment and settlement charges |  | $ 130 |  |
Voluntary Separation Program | GMNA | Forecast |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Payments | (85) |  |  |
Restructuring payments | $ 85 |  |  |

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