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Inventories (Tables)
12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Summary of Inventories
The following table summarizes the components of inventories:
(in millions)
2014
 
2013
Raw materials
$
53.1

 
$
46.1

Work in process
23.7

 
24.3

Finished goods
44.2

 
39.4

Total inventories
$
121.0

 
$
109.8