Pension and Employee Benefit Plans, Changes in Benefit Obligations, Plan Assets, and Funded Status (Details) - Pension Plans [Member] - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year		$ 273.6	$ 269.8
Service cost		0.5	0.5	$ 0.6
Interest cost		9.6	9.9	9.8
Actuarial loss		1.7	4.4
Benefits paid		(22.8)	(16.9)
Curtailment gain	[1]	0.0	(0.3)
Effect of exchange rate changes		(3.8)	6.2
Benefit obligation at end of year		258.8	273.6	269.8
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year		157.7	148.2
Actual return on plan assets		6.3	10.4
Benefits paid		(22.8)	(16.9)
Employer contributions		13.9	16.0
Fair value of plan assets at end of year		155.1	157.7	148.2
Funded status at end of year		(103.7)	(115.9)
Amounts recognized in the consolidated balance sheets [Abstract]
Current liability		(2.0)	(6.3)
Noncurrent liability		(101.7)	(109.6)
Total liability		(103.7)	(115.9)
Pension plans with accumulated benefit obligations in excess of plan assets [Abstract]
Accumulated benefit obligation		256.9	271.8
Amounts recognized in accumulated other comprehensive loss [Abstract]
Net actuarial loss (gain)		159.1	157.9
No-U.S Plans [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year		43.4	39.3
Benefits paid			(2.6)
Benefit obligation at end of year		36.5	43.4	39.3
Change in plan assets [Roll Forward]
Employer contributions		5.9	2.6	$ 1.4
Non-U.S Plans [Abstract]
Increase (decrease) in benefit obligation		(6.9)	4.1
Impact of exchange rate changes and service and interest cost on benefit obligation		$ 1.1	$ 1.3

[1] During fiscal 2018, the Company recorded a pension curtailment gain associated with the closure of a manufacturing facility in Austria (CIS segment). See Note 6 for additional information regarding the closure of this facility.