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Property, Plant and Equipment (Tables)
12 Months Ended
Mar. 31, 2017
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
Property, plant and equipment, including depreciable lives, consisted of the following:

  
March 31,
 
  
2017
  
2016
 
Land
 
$
18.9
  
$
7.2
 
Buildings and improvements (10-40 years)
  
255.6
   
221.3
 
Machinery and equipment (3-12 years)
  
755.5
   
694.3
 
Office equipment (3-10 years)
  
92.5
   
84.1
 
Construction in progress
  
55.1
   
36.7
 
   
1,177.6
   
1,043.6
 
Less: accumulated depreciation
  
(718.6
)
  
(705.0
)
Net property, plant and equipment
 
$
459.0
  
$
338.6