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Inventories
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
 
March 31, 2020
 
December 31, 2019
Total productive material, supplies and work in process
$
4,843

 
$
4,713

Finished product, including service parts
5,956

 
5,685

Total inventories
$
10,799

 
$
10,398