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, 2021	Mar. 31, 2020	Mar. 31, 2019
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year		$ 264.7	$ 258.8
Service cost		0.4	0.4	$ 0.5
Interest cost		7.9	9.1	9.6
Actuarial loss		2.7	15.5
Benefits paid		(17.1)	(18.2)
Curtailment gains	[1]	(0.1)	(0.3)
Effect of exchange rate changes		2.1	(0.6)
Benefit obligation at end of year		260.6	264.7	258.8
Change in Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		131.1	155.1
Actual return on plan assets		47.8	(11.6)
Benefits paid		(17.1)	(18.2)
Employer contributions		21.5	5.8
Fair value of plan assets at end of year		183.3	131.1	155.1
Funded status at end of year		(77.3)	(133.6)
Amounts Recognized in the Consolidated Balance Sheets [Abstract]
Current liability		(0.9)	(2.7)
Noncurrent liability		(58.6)	(130.9)
Liabilities held for sale		(17.8)	0.0
Total liability		(77.3)	(133.6)
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Accumulated benefit obligation		258.9	263.1
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net actuarial loss (gain)		151.1	191.5
Non-U.S Plans [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year		35.7	36.5
Benefits paid		(2.2)	(2.2)
Effect of exchange rate changes		2.2
Service and interest cost		0.7	0.9
Increase (decrease) in benefit obligation		0.7	(0.8)
Benefit obligation at end of year		36.4	35.7	36.5
Change in Plan Assets [Roll Forward]
Employer contributions		$ 2.2	$ 2.3	$ 5.9

[1] The curtailment gains in fiscal 2021 and 2020 are associated with headcount reductions in Europe within the Automotive segment.  The Company recognizes curtailment gains as a component of net periodic benefit cost in the period headcount reductions occur.  See Note 6 for additional information on the Company’s restructuring activities.