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Revenue - Disaggregation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue $ 157,658 $ 143,975 $ 113,590
Leased vehicle income 7,266 7,811 9,026
Finance charge income 6,187 4,519 4,103
Other income 732 431 285
GM Financial net sales and revenue 14,184 12,760 13,414
Net sales and revenue 171,842 156,735 127,004
Operating Segments | Cruise      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 102 102 106
Net sales and revenue 102 102 106
Operating Segments | GM Financial      
Disaggregation of Revenue [Line Items]      
Leased vehicle income 7,266 7,811 9,026
Finance charge income 6,204 4,521 4,103
Other income 754 435 290
GM Financial net sales and revenue 14,225 12,766 13,419
Net sales and revenue 14,225 12,766 13,419
Eliminations/ Reclassifications      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue (110) (101) (100)
Leased vehicle income 0 0 0
Finance charge income (18) (2) 0
Other income (23) (4) (5)
GM Financial net sales and revenue (41) (6) (5)
Net sales and revenue (151) (107) (105)
Automotive      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 157,658 143,975 113,590
Automotive | Operating Segments      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 157,667 143,974 113,584
Net sales and revenue 157,667 143,974 113,584
Automotive | Operating Segments | GMNA      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 141,445 128,378 101,308
Net sales and revenue 141,445 128,378 101,308
Automotive | Operating Segments | GMI      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 15,949 15,420 12,172
Net sales and revenue 15,949 15,420 12,172
Automotive | Corporate      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 273 177 104
Net sales and revenue 273 177 104
Vehicle, parts and accessories      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 151,510 138,692 108,485
Vehicle, parts and accessories | Eliminations/ Reclassifications      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue (10) 0 0
Vehicle, parts and accessories | Automotive | Operating Segments      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 151,520 138,692 108,485
Vehicle, parts and accessories | Automotive | Operating Segments | GMNA      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 136,983 124,657 97,515
Vehicle, parts and accessories | Automotive | Operating Segments | GMI      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 14,424 13,993 10,956
Vehicle, parts and accessories | Automotive | Corporate      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 113 42 14
Used vehicles      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 991 516 594
Used vehicles | Eliminations/ Reclassifications      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 0 0 0
Used vehicles | Automotive | Operating Segments      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 991 516 594
Used vehicles | Automotive | Operating Segments | GMNA      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 954 483 545
Used vehicles | Automotive | Operating Segments | GMI      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 37 33 49
Used vehicles | Automotive | Corporate      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 0 0 0
Services and other      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 5,157 4,766 4,511
Services and other | Operating Segments | Cruise      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 102 102 106
Services and other | Eliminations/ Reclassifications      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue (100) (101) (100)
Services and other | Automotive | Operating Segments      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 5,155 4,765 4,505
Services and other | Automotive | Operating Segments | GMNA      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 3,508 3,238 3,248
Services and other | Automotive | Operating Segments | GMI      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue 1,487 1,393 1,167
Services and other | Automotive | Corporate      
Disaggregation of Revenue [Line Items]      
Automotive net sales and revenue $ 160 $ 134 $ 90