Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Property, Plant and Equipment - Additional Information (Detail)

v3.8.0.1
Property, Plant and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 88.9 $ 80.3 $ 76.3
Cost of Goods Sold [Member]      
Property, Plant and Equipment [Line Items]      
Asset impairment charges $ 0.7 $ 0.5 $ 3.5