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Revenue - Disaggregation (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | $ 113,590 | $ 108,673 | $ 122,697
Leased vehicle income | 9,026 | 9,530 | 10,032
Finance charge income | 4,103 | 3,995 | 4,064
Other income | 285 | 287 | 444
GM Financial net sales and revenue | 13,414 | 13,812 | 14,540
Total net sales and revenue (Note 3) | 127,004 | 122,485 | 137,237
Operating Segments | Cruise |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 106 | 103 | 100
Total net sales and revenue (Note 3) | 106 | 103 | 100
Operating Segments | GM Financial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Leased vehicle income | 9,026 | 9,530 | 10,032
Finance charge income | 4,103 | 3,996 | 4,071
Other income | 290 | 305 | 451
GM Financial net sales and revenue | 13,419 | 13,831 | 14,554
Total net sales and revenue (Note 3) | 13,419 | 13,831 | 14,554
Eliminations/ Reclassifications |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | (100) | (99) | (100)
Leased vehicle income | 0 | 0 | 0
Finance charge income | 0 | (1) | (7)
Other income | (5) | (18) | (7)
GM Financial net sales and revenue | (5) | (19) | (14)
Total net sales and revenue (Note 3) | (105) | (118) | (114)
Automotive |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 113,590 | 108,673 | 122,697
Automotive | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 113,584 | 108,669 | 122,697
Total net sales and revenue (Note 3) | 113,584 | 108,669 | 122,697
Automotive | Operating Segments | GMNA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 101,308 | 96,733 | 106,366
Total net sales and revenue (Note 3) | 101,308 | 96,733 | 106,366
Automotive | Operating Segments | GMI |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 12,172 | 11,586 | 16,111
Total net sales and revenue (Note 3) | 12,172 | 11,586 | 16,111
Automotive | Corporate |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 104 | 350 | 220
Total net sales and revenue (Note 3) | 104 | 350 | 220
Vehicle, parts and accessories |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 108,485 | 103,343 | 116,277
Vehicle, parts and accessories | Eliminations/ Reclassifications |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 0 | 0 | 0
Vehicle, parts and accessories | Automotive | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 108,485 | 103,343 | 116,277
Vehicle, parts and accessories | Automotive | Operating Segments | GMNA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 97,515 | 92,749 | 101,346
Vehicle, parts and accessories | Automotive | Operating Segments | GMI |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 10,956 | 10,593 | 14,931
Vehicle, parts and accessories | Automotive | Corporate |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 14 | 1 | 0
Used vehicles |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 594 | 1,010 | 2,019
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 | 594 | 1,010 | 2,019
Used vehicles | Automotive | Operating Segments | GMNA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 545 | 875 | 1,896
Used vehicles | Automotive | Operating Segments | GMI |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 49 | 115 | 123
Used vehicles | Automotive | Corporate |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 0 | 20 | 0
Services and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 4,511 | 4,320 | 4,401
Services and other | Operating Segments | Cruise |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 106 | 103 | 100
Services and other | Eliminations/ Reclassifications |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | (100) | (99) | (100)
Services and other | Automotive | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 4,505 | 4,316 | 4,401
Services and other | Automotive | Operating Segments | GMNA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 3,248 | 3,109 | 3,124
Services and other | Automotive | Operating Segments | GMI |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | 1,167 | 878 | 1,057
Services and other | Automotive | Corporate |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Automotive net sales and revenue | $ 90 | $ 329 | $ 220

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