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Inventories (Tables)
 3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
The components of inventory were as follows:
 
March 31,
2019
 
December 31,
2018
Raw materials and supplies
$
128.8

 
$
120.3

Work in process
30.7

 
26.2

Finished products
79.3

 
74.6

Inventory reserves
(31.3
)
 
(30.3
)
 
$
207.5

 
$
190.8