Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring and repositioning expenses [Abstract]
Employee severance and related benefits	$ 1.3	$ 1.8	$ 5.7	$ 3.3
Other restructuring and repositioning expenses	0.2	0.5	0.4	0.8
Total	1.5	2.3	6.1	4.1
Changes in accrued severance [Roll Forward]
Beginning balance	6.9	7.8	5.0	10.0
Additions	1.3	1.8	5.7	3.3
Payments	(2.6)	(2.0)	(5.2)	(5.7)
Effect of exchange rate changes	0.2	(0.2)	0.3	(0.2)
Ending balance	5.8	$ 7.4	5.8	$ 7.4
CIS [Member]
Restructuring and repositioning expenses [Abstract]
Employee severance and related benefits	$ 1.3		$ 3.0