Product Warranties, Operating Leases, and Other Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018		Mar. 31, 2017	Mar. 31, 2016
Changes in accrued warranty costs [Roll Forward]
Beginning balance	$ 10.0		$ 8.3
Warranties recorded at time of sale	6.7		5.2
Adjustments to pre-existing warranties	(0.8)		0.3
Additions and adjustments due to acquisition	(1.0)	[1]	4.1
Settlements	(6.2)		(7.6)
Effect of exchange rate changes	0.6		(0.3)
Ending balance	9.3		10.0	$ 8.3
Rental expense	18.5		$ 12.8	$ 11.9
Future minimum rental commitments under non-cancelable operating leases [Abstract]
2019	14.4
2020	12.0
2021	10.4
2022	7.1
2023	6.6
2024 and beyond	24.6
Total future minimum rental commitments	75.1
Other Commitments [Line Items]
Capital expenditure commitments	$ 24.1
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

[1] During fiscal 2018, the Company decreased its liability for product warranties by $1.0 million as a result of measurement period adjustments made in connection with purchase accounting for the acquisition of Luvata HTS. See Note 2 for additional information.