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Revenue - Revenue by Major Source (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | $ 44,256 | $ 44,735 | $ 126,986 | $ 128,008
Leased vehicle income | 1,968 | 1,828 | 5,810 | 5,431
Finance charge income | 2,060 | 1,956 | 6,129 | 5,602
Other income | 308 | 237 | 808 | 698
GM Financial net sales and revenue | 4,335 | 4,021 | 12,747 | 11,732
Net sales and revenue | 48,591 | 48,757 | 139,732 | 139,740
Vehicle, parts and accessories |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 42,159 | 43,097 | 121,424 | 123,275
Used vehicles |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 461 | 377 | 1,309 | 948
Services and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 1,637 | 1,260 | 4,253 | 3,784
Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales and revenue | 48,533 | 48,731 | 139,579 | 139,715
Operating Segments | GMNA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales and revenue | 40,551 | 41,157 | 117,424 | 117,981
Operating Segments | GMI |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales and revenue | 3,645 | 3,517 | 9,398 | 9,897
Operating Segments | Cruise |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue |  | 26 | 1 | 76
Net sales and revenue | 0 | 26 | 1 | 76
Operating Segments | GM Financial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Leased vehicle income | 1,968 | 1,828 | 5,810 | 5,431
Finance charge income | 2,060 | 1,965 | 6,132 | 5,627
Other income | 309 | 238 | 813 | 703
GM Financial net sales and revenue | 4,337 | 4,031 | 12,756 | 11,761
Net sales and revenue | 4,337 | 4,031 | 12,756 | 11,761
Operating Segments | Services and other | Cruise |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue |  | 26 | 1 | 76
Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales and revenue | 60 | 62 | 163 | 130
Eliminations/Reclassifications |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 0 | (26) | 0 | (76)
Leased vehicle income | 0 | 0 | 0 | 0
Finance charge income | 0 | (8) | (4) | (25)
Other income | (2) | (2) | (5) | (5)
GM Financial net sales and revenue | (2) | (10) | (9) | (29)
Net sales and revenue | (2) | (36) | (9) | (105)
Eliminations/Reclassifications | Vehicle, parts and accessories |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 0 | (1) | 0 | (1)
Eliminations/Reclassifications | Used vehicles |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 0 | 0 | 0 | 0
Eliminations/Reclassifications | Services and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 0 | (25) | 0 | (75)
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 44,256 | 44,735 | 126,986 | 128,008
Automotive | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 44,256 | 44,735 | 126,985 | 128,007
Net sales and revenue | 44,256 | 44,735 | 126,985 | 128,007
Automotive | Operating Segments | GMNA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 40,551 | 41,157 | 117,424 | 117,981
Net sales and revenue | 40,551 | 41,157 | 117,424 | 117,981
Automotive | Operating Segments | GMI |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 3,645 | 3,517 | 9,398 | 9,897
Net sales and revenue | 3,645 | 3,517 | 9,398 | 9,897
Automotive | Operating Segments | Vehicle, parts and accessories |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 42,159 | 43,098 | 121,424 | 123,276
Automotive | Operating Segments | Vehicle, parts and accessories | GMNA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 38,752 | 39,817 | 112,770 | 114,131
Automotive | Operating Segments | Vehicle, parts and accessories | GMI |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 3,355 | 3,244 | 8,554 | 9,095
Automotive | Operating Segments | Used vehicles |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 461 | 377 | 1,309 | 948
Automotive | Operating Segments | Used vehicles | GMNA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 453 | 368 | 1,284 | 927
Automotive | Operating Segments | Used vehicles | GMI |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 8 | 9 | 25 | 21
Automotive | Operating Segments | Services and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 1,637 | 1,259 | 4,252 | 3,783
Automotive | Operating Segments | Services and other | GMNA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 1,347 | 971 | 3,370 | 2,923
Automotive | Operating Segments | Services and other | GMI |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 282 | 264 | 819 | 780
Automotive | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 60 | 62 | 163 | 130
Net sales and revenue | 60 | 62 | 163 | 130
Automotive | Corporate | Vehicle, parts and accessories |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 52 | 37 | 100 | 50
Automotive | Corporate | Used vehicles |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | 0 | 0 | 0 | 0
Automotive | Corporate | Services and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Automotive net sales and revenue | $ 8 | $ 24 | $ 63 | $ 80

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