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Inventories (Tables)
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Components of Inventories
The following table summarizes the components of inventories:
(in millions)
June 30,
2014
 
December 31,
2013
Raw materials
$
53.5

 
$
46.1

Work in progress
31.1

 
24.3

Finished goods
39.7

 
39.4

Total inventories
$
124.3

 
$
109.8