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Variable Interest Entities (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Consolidated [Abstract]      
Total assets $ 289,289 $ 273,064 $ 281,705
Variable Interest Entity, Not Primary Beneficiary      
Consolidated [Abstract]      
Total assets 3,800 2,400  
Maximum loss exposure amount 6,100 3,500  
Variable Interest Entity, Not Primary Beneficiary | Battery Cell Manufacturing Joint Ventures | Capital Addition Purchase Commitments      
Consolidated [Abstract]      
Committed capital contributions 2,200 800  
GM Financial      
Consolidated [Abstract]      
GM Financial receivables – current 44,453 39,076  
GM Financial receivables – non-current 45,928 45,043  
GM Financial short-term debt and current portion of long-term debt 35,218 38,540  
GM Financial long-term debt 76,149 66,788  
GM Financial | Consolidated VIE      
Consolidated [Abstract]      
Restricted cash – current 2,278 2,398  
Restricted cash – non-current 355 367  
GM Financial receivables – current 25,216 22,990  
GM Financial receivables – non-current 25,135 23,535  
GM Financial equipment on operating leases, net 12,292 15,794  
GM Financial short-term debt and current portion of long-term debt 14,912 22,088  
GM Financial long-term debt $ 28,663 $ 23,210