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Commitments and Contingencies - Narrative (Details)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
USD ($)
Jul. 31, 2021
defect
Jun. 30, 2021
USD ($)
Loss Contingencies [Line Items]                  
Supplier recoveries accrued in period $ (733) $ 81   $ (689) $ 138        
Maximum liability, guarantees 3,400     3,400     $ 3,100    
Supplier finance obligation 1,100     1,100     852    
Accrued Liabilities, Current and Other Liabilities, Noncurrent                  
Loss Contingencies [Line Items]                  
Estimated litigation liability 1,000     1,000     1,100    
Product liability 590     590     $ 561    
Indirect Tax Matters                  
Loss Contingencies [Line Items]                  
Estimate of possible loss 1,600     1,600          
Chevrolet Bolt EV Recall                  
Loss Contingencies [Line Items]                  
Probable loss accrual     $ 1,200           $ 812
Number of manufacturing defects | defect               2  
Supplier recoveries accrued in period 792                
Chevrolet Bolt EV Recall | LG                  
Loss Contingencies [Line Items]                  
Amount awarded to other party     $ 1,900            
Environmental Protection Agency                  
Loss Contingencies [Line Items]                  
Probable loss accrual 311     311          
Increase in accrual during period 150                
Takata Passenger-side Airbags                  
Loss Contingencies [Line Items]                  
Increase in product warranty accrual           $ 1,100      
GM Korea Subcontract Workers Litigation                  
Loss Contingencies [Line Items]                  
Probable loss accrual 194     194          
Estimate of possible loss $ 94     $ 94