Pensions (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost	[1]	$ 0.6	$ 0.6	$ 2.0	$ 2.2
Pension [Member]
Components of net periodic benefit cost [Abstract]
Service cost		0.2	0.1	0.4	0.4
Interest cost		2.4	2.5	7.2	7.4
Expected return on plan assets		(3.1)	(2.9)	(9.2)	(8.9)
Amortization of unrecognized net loss		1.4	1.4	4.2	4.2
Curtailment gain	[2]	0.0	(0.3)	0.0	(0.3)
Net periodic benefit cost		$ 0.9	$ 0.8	2.6	2.8
Pension [Member] | United States [Member]
Defined benefit plan, plan assets [Abstract]
Employer contributions				$ 4.6	$ 11.1

[1] Represents net periodic benefit cost, exclusive of service cost, for the Company's pension and postretirement plans.

[2] During the third quarter of fiscal 2018, the Company recorded a curtailment gain as a result of the closure of a manufacturing facility in Austria (CIS segment). See Note 6 for additional information regarding the closure of this facility.