v3.26.3
Revenue - Revenue by Major Source (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue $ 45,706 $ 44,256 $ 128,817 $ 126,986
Leased vehicle income 1,939 1,968 5,893 5,810
Finance charge income 2,062 2,060 6,034 6,129
Other income 308 308 921 808
GM Financial net sales and revenue 4,309 4,335 12,848 12,747
Net sales and revenue 50,015 48,591 141,665 139,732
Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 43,549 42,159 122,571 121,424
Used vehicles        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 597 461 1,654 1,309
Services and other        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 1,559 1,637 4,591 4,253
Operating Segments        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 49,816 48,533 141,222 139,579
Operating Segments | GMNA        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 41,419 40,551 117,732 117,424
Operating Segments | GMI        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 4,085 3,645 10,635 9,398
Operating Segments | Cruise        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue   0   1
Net sales and revenue   0   1
Operating Segments | GM Financial        
Disaggregation of Revenue [Line Items]        
Leased vehicle income 1,939 1,968 5,893 5,810
Finance charge income 2,062 2,060 6,034 6,132
Other income 311 309 928 813
GM Financial net sales and revenue 4,312 4,337 12,855 12,756
Net sales and revenue 4,312 4,337 12,855 12,756
Operating Segments | Services and other | Cruise        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue   0   1
Corporate        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 201 60 450 163
Eliminations/Reclassifications        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 0 0 0 0
Leased vehicle income 0 0 0 0
Finance charge income 0 0 0 (4)
Other income (3) (2) (7) (5)
GM Financial net sales and revenue (3) (2) (7) (9)
Net sales and revenue (3) (2) (7) (9)
Eliminations/Reclassifications | Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 0 0 0 0
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 0 0 0
Automotive        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 45,706 44,256 128,817 126,986
Automotive | Operating Segments        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 45,706 44,256 128,817 126,985
Net sales and revenue 45,706 44,256 128,817 126,985
Automotive | Operating Segments | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 41,419 40,551 117,732 117,424
Net sales and revenue 41,419 40,551 117,732 117,424
Automotive | Operating Segments | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 4,085 3,645 10,635 9,398
Net sales and revenue 4,085 3,645 10,635 9,398
Automotive | Operating Segments | Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 43,549 42,159 122,571 121,424
Automotive | Operating Segments | Vehicle, parts, and accessories | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 39,619 38,752 112,482 112,770
Automotive | Operating Segments | Vehicle, parts, and accessories | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 3,791 3,355 9,758 8,554
Automotive | Operating Segments | Used vehicles        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 597 461 1,654 1,309
Automotive | Operating Segments | Used vehicles | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 585 453 1,622 1,284
Automotive | Operating Segments | Used vehicles | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 12 8 32 25
Automotive | Operating Segments | Services and other        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 1,559 1,637 4,591 4,252
Automotive | Operating Segments | Services and other | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 1,215 1,347 3,627 3,370
Automotive | Operating Segments | Services and other | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 282 282 845 819
Automotive | Corporate        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 201 60 450 163
Net sales and revenue 201 60 450 163
Automotive | Corporate | Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 139 52 331 100
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 $ 62 $ 8 $ 119 $ 63