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, 2018		Mar. 31, 2017		Mar. 31, 2016
Change in benefit obligation [Roll Forward]
Benefit obligation at beginning of year	$ 269.8		$ 261.0
Service cost	0.5		0.6		$ 0.6
Interest cost	9.9		9.8		11.2
Actuarial loss (gain)	4.4		(0.5)
Benefits paid	(16.9)		(19.8)
Curtailment gain	(0.3)	[1]	0.0
Acquired obligations	0.0		20.3	[2]
Effect of exchange rate changes	6.2		(1.6)
Benefit obligation at end of year	273.6		269.8		261.0
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year	148.2		141.5
Actual return on plan assets	10.4		11.0
Benefits paid	(16.9)		(19.8)
Employer contributions	16.0		9.5
Acquired plan assets	0.0		6.0	[2]
Fair value of plan assets at end of year	157.7		148.2		$ 141.5
Funded status at end of year	(115.9)		(121.6)
Amounts recognized in the consolidated balance sheets [Abstract]
Current liability	(6.3)		(2.2)
Noncurrent liability	(109.6)		(119.4)
Total liability	(115.9)		(121.6)
Pension plans with accumulated benefit obligations in excess of plan assets [Abstract]
Accumulated benefit obligation	271.8		266.8
Amounts recognized in accumulated other comprehensive loss [Abstract]
Net actuarial loss (gain)	$ 157.9		$ 156.8

[1] During the third quarter of fiscal 2018, the Company recorded a pension curtailment gain associated with the closure of a manufacturing facility in Austria (CIS segment). See Note 5 for additional information regarding the closure of this facility.

[2] In fiscal 2017, as a result of its acquisition of Luvata HTS, the Company acquired pension plans in Italy, Austria and the U.S. See Note 2 for additional information regarding this acquisition.