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Property, Plant and Equipment, net
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net
Property, Plant and Equipment, net
The components of property, plant and equipment, net are as follows:
 
  
 
December 31,
(in millions)
 
2014
 
2013
Land and land improvements
 
$
9.9

 
$
10.5

Buildings and building improvements
 
86.9

 
93.2

Machinery and equipment
 
639.6

 
701.1

Capital leases
 
2.0

 
2.2

Assets in process
 
9.9

 
5.1

Property, plant and equipment, gross
 
748.3

 
812.1

Less accumulated depreciation
 
644.6

 
689.3

Property, plant and equipment, net
 
$
103.7

 
$
122.8


Depreciation expense associated with property, plant and equipment was $25.0 million, $33.5 million and $36.3 million for the years ended December 31, 2014, 2013 and 2012, respectively.