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Variable Interest Entities (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Consolidated [Abstract]      
Total assets $ 281,705 $ 264,037 $ 260,529
GM Financial      
Consolidated [Abstract]      
GM Financial receivables, net of fees – current 36,224 33,623  
GM Financial receivables, net of fees – non-current 44,987 40,591  
GM Financial short-term debt and current portion of long-term debt 38,256 36,819  
GM Financial long-term debt 64,259 60,036  
Consolidated VIE | GM Financial      
Consolidated [Abstract]      
Restricted cash – current 3,092 2,176  
Restricted cash – non-current 367 360  
GM Financial receivables, net of fees – current 20,897 19,896  
GM Financial receivables, net of fees – non-current 22,912 18,748  
GM Financial equipment on operating leases, net 16,120 18,456  
GM Financial short-term debt and current portion of long-term debt 22,895 21,643  
GM Financial long-term debt 22,440 20,545  
Variable Interest Entity, Not Primary Beneficiary      
Consolidated [Abstract]      
Total assets 2,500 1,600  
Maximum loss exposure amount 3,500 3,300  
Variable Interest Entity, Not Primary Beneficiary | Ultium Cells LLC | Capital Addition Purchase Commitments      
Consolidated [Abstract]      
Committed capital contributions $ 800 $ 1,400