Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2015
Restructuring and repositioning expenses [Abstract]
Employee severance and related benefits	$ (0.2)	$ 0.1	$ 1.7	$ 0.4
Other restructuring and repositioning expenses	1.2	0.9	1.9	1.4
Total	1.0	1.0	3.6	1.8
Changes in accrued severance [Roll Forward]
Beginning Balance	9.8	17.7	9.9	19.4
Additions and adjustments	(0.2)	0.1	1.7	0.4
Payments	(1.8)	(0.6)	(4.2)	(2.5)
Effect of exchange rate changes	0.0	(1.2)	0.4	(1.3)
Ending Balance	7.8	$ 16.0	7.8	$ 16.0
Assets Held-for-Sale [Abstract]
Assets held for sale	$ 8.5		$ 8.5		$ 3.2