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Inventories (Tables)
3 Months Ended
Mar. 31, 2018
Inventory, Gross [Abstract]  
Components of Inventories
 
March 31, 2018
 
December 31, 2017
Raw materials and supplies
760

 
$
737

Work in process
157

 
139

Finished goods
514

 
509

 
$
1,431

 
$
1,385