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Property, Plant and Equipment, net
6 Months Ended
Jun. 30, 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: 
(in millions)
June 30, 2014
 
December 31, 2013
Land and land improvements
$
10.7

 
$
10.5

Buildings and building improvements
95.0

 
93.2

Machinery and equipment
723.3

 
701.1

Capital leases
2.2

 
2.2

Construction in process
6.5

 
5.1

Property, plant and equipment, gross
837.7

 
812.1

Less accumulated depreciation
717.5

 
689.3

Property, plant and equipment, net
$
120.2

 
$
122.8


Depreciation expense associated with property, plant and equipment was $6.4 million and $9.0 million for the three months ended June 30, 2014 and 2013, respectively and $12.8 million and $18.3 million for the six months ended June 30, 2014 and 2013, respectively.