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Variable Interest Entities (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Consolidated [Abstract]      
Total assets $ 282,104 $ 279,761 $ 276,591
Variable Interest Entity, Not Primary Beneficiary      
Consolidated [Abstract]      
Total assets 4,100 4,300  
Maximum loss exposure amount 7,500 7,000  
Variable Interest Entity, Not Primary Beneficiary | Battery Cell Manufacturing Joint Ventures | Capital Addition Purchase Commitments      
Consolidated [Abstract]      
Committed capital contributions 2,200 2,300  
GM Financial      
Consolidated [Abstract]      
GM Financial receivables – current 44,517 46,362  
GM Financial receivables – non-current 46,534 46,474  
GM Financial short-term debt and current portion of long-term debt 33,768 37,291  
GM Financial long-term debt 83,270 76,973  
GM Financial | Consolidated VIE      
Consolidated [Abstract]      
Restricted cash – current 2,647 2,410  
Restricted cash – non-current 363 350  
GM Financial receivables – current 23,563 27,631  
GM Financial receivables – non-current 26,593 27,619  
GM Financial equipment on operating leases, net 15,080 14,252  
GM Financial short-term debt and current portion of long-term debt 14,147 18,008  
GM Financial long-term debt $ 34,789 $ 31,638