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Inventories
3 Months Ended
Mar. 31, 2018
Inventory, Net, Items Net of Reserve Alternative [Abstract]  
Inventories
Inventories

Inventories by major class are as follows:
 
March 31,
2018
 
December 31,
2017
Raw materials and supplies
$
258

 
$
267

Work-in-process
49

 
42

Finished goods
1,005

 
912

Total Inventories
$
1,312

 
$
1,221