v3.26.1
Revenue - Revenue by Major Source (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue $ 43,762 $ 42,869 $ 83,111 $ 82,730
Leased vehicle income 1,970 1,940 3,955 3,842
Finance charge income 2,006 2,048 3,972 4,069
Other income 289 265 613 500
GM Financial net sales and revenue 4,264 4,253 8,539 8,412
Net sales and revenue 48,026 47,122 91,650 91,141
Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 41,583 40,998 79,023 79,267
Used vehicles        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 632 524 1,057 848
Services and other        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 1,547 1,348 3,032 2,615
Operating Segments        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 47,870 47,067 91,406 91,046
Operating Segments | GMNA        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 39,912 39,486 76,312 76,873
Operating Segments | GMI        
Disaggregation of Revenue [Line Items]        
Net sales and revenue 3,691 3,326 6,550 5,753
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 1,970 1,940 3,955 3,842
Finance charge income 2,006 2,048 3,972 4,073
Other income 291 267 617 504
GM Financial net sales and revenue 4,267 4,255 8,543 8,419
Net sales and revenue 4,267 4,255 8,543 8,419
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 159 57 249 103
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) (4) (4)
GM Financial net sales and revenue (3) (2) (4) (7)
Net sales and revenue (3) (2) (4) (7)
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 43,762 42,869 83,111 82,730
Automotive | Operating Segments        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 43,762 42,869 83,111 82,729
Net sales and revenue 43,762 42,869 83,111 82,729
Automotive | Operating Segments | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 39,911 39,486 76,312 76,873
Net sales and revenue 39,912 39,486 76,312 76,873
Automotive | Operating Segments | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 3,691 3,326 6,550 5,753
Net sales and revenue 3,691 3,326 6,550 5,753
Automotive | Operating Segments | Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 41,583 40,998 79,023 79,267
Automotive | Operating Segments | Vehicle, parts, and accessories | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 38,062 37,893 72,864 74,019
Automotive | Operating Segments | Vehicle, parts, and accessories | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 3,396 3,075 5,967 5,200
Automotive | Operating Segments | Used vehicles        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 632 524 1,057 848
Automotive | Operating Segments | Used vehicles | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 621 515 1,037 831
Automotive | Operating Segments | Used vehicles | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 11 9 20 17
Automotive | Operating Segments | Services and other        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 1,547 1,348 3,031 2,614
Automotive | Operating Segments | Services and other | GMNA        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 1,229 1,078 2,411 2,023
Automotive | Operating Segments | Services and other | GMI        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 284 243 563 536
Automotive | Corporate        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 159 57 249 103
Net sales and revenue 159 57 249 103
Automotive | Corporate | Vehicle, parts, and accessories        
Disaggregation of Revenue [Line Items]        
Automotive net sales and revenue 125 30 192 48
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 $ 34 $ 27 $ 57 $ 55