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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment (and related depreciable lives) consisted of the following ($ in millions):
 
December 31,
 
2015
 
2014
Land and improvements
$
11.5

 
$
19.3

Buildings and improvements (20 to 40 years or remaining life of relevant lease)
117.5

 
131.3

Machinery and equipment (5 to 20 years)
513.0

 
540.6

Construction in progress
20.8

 
42.1

Gross Property, Plant and Equipment
662.8

 
733.3

Less: Accumulated Depreciation
354.7

 
371.3

Property, Plant and Equipment, net
$
308.1

 
$
362.0