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Accrued and Other Liabilities - Product Warranty and Other Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Product Warranty and Related Liabilities [Roll Forward]        
Warranty balance at beginning of period $ 9,180 $ 7,040 $ 8,242 $ 7,798
Warranties issued and assumed in period – recall campaigns 1,237 249 2,686 407
Warranties issued and assumed in period – product warranty 345 523 1,250 1,241
Payments (756) (727) (2,275) (2,260)
Adjustments to pre-existing warranties 86 53 178 33
Effect of foreign currency and other (28) 17 (17) (64)
Warranty balance at end of period $ 10,064 $ 7,155 10,064 $ 7,155
Chevrolet Bolt EV Recall        
Product Warranty and Related Liabilities [Roll Forward]        
Warranties issued and assumed in period – recall campaigns     $ 2,000