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Variable Interest Entities (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Consolidated [Abstract]      
Total assets $ 282,956 $ 273,064 $ 275,833
GM Financial      
Consolidated [Abstract]      
GM Financial receivables – current 42,783 39,076  
GM Financial receivables – non-current 44,747 45,043  
GM Financial short-term debt and current portion of long-term debt 37,176 38,540  
GM Financial long-term debt 72,929 66,788  
Consolidated VIE | GM Financial      
Consolidated [Abstract]      
Restricted cash – current 2,394 2,398  
Restricted cash – non-current 345 367  
GM Financial receivables – current 25,095 22,990  
GM Financial receivables – non-current 23,305 23,535  
GM Financial equipment on operating leases, net 15,121 15,794  
GM Financial short-term debt and current portion of long-term debt 18,278 22,088  
GM Financial long-term debt 26,430 23,210  
Variable Interest Entity, Not Primary Beneficiary      
Consolidated [Abstract]      
Total assets 3,200 2,400  
Maximum loss exposure amount 3,700 3,500  
Variable Interest Entity, Not Primary Beneficiary | Ultium Cells LLC | Capital Addition Purchase Commitments      
Consolidated [Abstract]      
Committed capital contributions $ 300 $ 800