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Inventories (Tables)
3 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Components of Inventories
March 31, 2023December 31, 2022
Total productive material, supplies and work in process$8,822 $8,014 
Finished product, including service parts8,935 7,353 
Total inventories$17,758 $15,366