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Inventories (Tables)
 6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
The components of inventory were as follows:
 
June 30,
2018
 
December 31,
2017
Raw materials and supplies
$
128.4

 
$
132.9

Work in process
29.9

 
27.7

Finished products
78.1

 
82.4

Inventory reserves
(34.5
)
 
(38.1
)
 
$
201.9

 
$
204.9