Product Warranties (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Changes in accrued warranty costs [Roll Forward]
Beginning balance	$ 8.4	$ 10.0	$ 8.3	$ 10.4
Warranties recorded at time of sale	1.4	1.3	3.9	3.9
Adjustments to pre-existing warranties	0.1	(0.2)	0.0	(0.1)
Additions due to acquisition	4.1	0.0	4.1	0.0
Settlements	(2.1)	(1.0)	(4.4)	(4.2)
Effect of exchange rate changes	(0.3)	(0.2)	(0.3)	(0.1)
Ending balance	$ 11.6	$ 9.9	$ 11.6	$ 9.9