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Product Warranties, Operating Leases, and Other Commitments (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Changes in accrued warranty costs [Roll Forward]      
Beginning balance $ 8.3 $ 10.4  
Warranties recorded at time of sale 5.2 5.7  
Adjustments to pre-existing warranties 0.3 (1.1)  
Additions due to acquisition 4.1 0.0  
Settlements (7.6) (6.7)  
Effect of exchange rate changes (0.3) 0.0  
Ending balance 10.0 8.3 $ 10.4
Rental expense 12.8 $ 11.9 $ 11.5
Future minimum rental commitments under non-cancelable operating leases [Abstract]      
2018 12.2    
2019 10.1    
2020 9.1    
2021 7.8    
2022 5.4    
2023 and beyond 24.7    
Total future minimum rental commitments 69.3    
Other Commitments [Line Items]      
Capital expenditure commitments $ 18.1    
Minimum [Member]      
Product Warranty Liability [Line Items]      
Product warranty period 1 year    
Other Commitments [Line Items]      
Indemnification period 1 year    
Maximum [Member]      
Product Warranty Liability [Line Items]      
Product warranty period 5 years    
Other Commitments [Line Items]      
Indemnification period 15 years