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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory, Gross [Abstract]  
Components of Inventories
 
March 31, 2020
 
December 31, 2019
Raw materials and supplies
$
916

 
$
905

Work in process
158

 
151

Finished goods
594

 
570

 
$
1,668

 
$
1,626