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, 2020	Mar. 31, 2019	Mar. 31, 2018
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year		$ 258.8	$ 273.6
Service cost		0.4	0.5	$ 0.5
Interest cost		9.1	9.6	9.9
Actuarial loss		15.5	1.7
Benefits paid		(18.2)	(22.8)
Curtailment gain	[1]	(0.3)	0.0
Effect of exchange rate changes		(0.6)	(3.8)
Benefit obligation at end of year		264.7	258.8	273.6
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year		155.1	157.7
Actual return on plan assets		(11.6)	6.3
Benefits paid		(18.2)	(22.8)
Employer contributions		5.8	13.9
Fair value of plan assets at end of year		131.1	155.1	157.7
Funded status at end of year		(133.6)	(103.7)
Amounts recognized in the consolidated balance sheets [Abstract]
Current liability		(2.7)	(2.0)
Noncurrent liability		(130.9)	(101.7)
Total liability		(133.6)	(103.7)
Pension plans with accumulated benefit obligations in excess of plan assets [Abstract]
Accumulated benefit obligation		263.1	256.9
Amounts recognized in accumulated other comprehensive loss [Abstract]
Net actuarial loss (gain)		191.5	159.1
Non-U.S Plans [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year		36.5	43.4
Benefit obligation at end of year		35.7	36.5	43.4
Change in plan assets [Roll Forward]
Benefits paid		(2.2)	(5.9)
Employer contributions		2.3	5.9	$ 2.6
Increase (decrease) in benefit obligation		(0.8)	(6.9)
Service and interest cost		$ 0.9	$ 1.1

[1] The $0.3 million curtailment gain, which is associated with headcount reductions in Europe within the VTS segment, will be recognized as a component of net periodic benefit cost following the completion of the headcount reductions. See Note 5 for additional information on the Company’s restructuring activities.