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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Components of Inventories

December 31, 2019

December 31, 2018
Total productive material, supplies and work in process
$
4,713


$
4,274

Finished product, including service parts
5,685


5,542

Total inventories
$
10,398


$
9,816