v3.26.1
Revenue - Revenue by Major Source (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue $ 39,349 $ 39,861
Leased vehicle income 1,985 1,902
Finance charge income 1,966 2,021
Other income 325 236
GM Financial net sales and revenue 4,275 4,159
Net sales and revenue 43,624 44,020
Vehicle, parts, and accessories    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 37,440 38,268
Used vehicles    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 425 325
Services and other    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 1,485 1,269
Operating Segments    
Disaggregation of Revenue [Line Items]    
Net sales and revenue 43,536 43,979
Operating Segments | GMNA    
Disaggregation of Revenue [Line Items]    
Net sales and revenue 36,401 37,388
Operating Segments | GMI    
Disaggregation of Revenue [Line Items]    
Net sales and revenue 2,859 2,427
Operating Segments | Cruise    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue   1
Net sales and revenue   1
Operating Segments | GM Financial    
Disaggregation of Revenue [Line Items]    
Leased vehicle income 1,985 1,902
Finance charge income 1,966 2,025
Other income 326 237
GM Financial net sales and revenue 4,276 4,164
Net sales and revenue 4,276 4,164
Operating Segments | Services and other | Cruise    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue   1
Corporate    
Disaggregation of Revenue [Line Items]    
Net sales and revenue 90 46
Eliminations/Reclassifications    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 0 0
Leased vehicle income 0 0
Finance charge income 0 (4)
Other income (1) (1)
GM Financial net sales and revenue (1) (5)
Net sales and revenue (1) (5)
Eliminations/Reclassifications | Vehicle, parts, and accessories    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 0 0
Eliminations/Reclassifications | Used vehicles    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 0 0
Eliminations/Reclassifications | Services and other    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 0 0
Automotive    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 39,349 39,861
Automotive | Operating Segments    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 39,349 39,860
Net sales and revenue 39,349 39,860
Automotive | Operating Segments | GMNA    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 36,401 37,388
Net sales and revenue 36,401 37,388
Automotive | Operating Segments | GMI    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 2,859 2,427
Net sales and revenue 2,859 2,427
Automotive | Operating Segments | Vehicle, parts, and accessories    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 37,440 38,268
Automotive | Operating Segments | Vehicle, parts, and accessories | GMNA    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 34,802 36,125
Automotive | Operating Segments | Vehicle, parts, and accessories | GMI    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 2,571 2,125
Automotive | Operating Segments | Used vehicles    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 425 325
Automotive | Operating Segments | Used vehicles | GMNA    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 416 317
Automotive | Operating Segments | Used vehicles | GMI    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 9 8
Automotive | Operating Segments | Services and other    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 1,485 1,268
Automotive | Operating Segments | Services and other | GMNA    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 1,183 946
Automotive | Operating Segments | Services and other | GMI    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 279 294
Automotive | Corporate    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 90 46
Net sales and revenue 90 46
Automotive | Corporate | Vehicle, parts, and accessories    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 67 18
Automotive | Corporate | Used vehicles    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue 0 0
Automotive | Corporate | Services and other    
Disaggregation of Revenue [Line Items]    
Automotive net sales and revenue $ 23 $ 28