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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Components of Inventories
June 30, 2020December 31, 2019
Total productive material, supplies and work in process
$5,149  $4,713  
Finished product, including service parts5,131  5,685  
Total inventories$10,280  $10,398