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Property, Plant and Equipment (Tables)
12 Months Ended
Mar. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, plant and equipment, net is summarized as follows (in millions):
 March 31,
 20202019
Land$25.5  $25.7  
Buildings and improvements231.5  227.5  
Machinery and equipment371.9  350.9  
Hardware and software43.1  64.4  
Construction in-progress26.4  27.9  
698.4  696.4  
Less accumulated depreciation(319.6) (313.4) 
$378.8  $383.0