Pension and Employee Benefit Plans, Cost Components of Pension Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2024		Mar. 31, 2023	Mar. 31, 2022
Net Periodic Benefit Cost [Abstract]
Net periodic benefit cost	[1]	$ 3.3		$ 2.0	$ 1.1
Austrian Air-Cooled Automotive Business [Member]
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income [Abstract]
Write-off of net actuarial losses					1.7
Pension Plans [Member]
Net Periodic Benefit Cost [Abstract]
Service cost		0.2		0.2	0.3
Interest cost		9.3		8.1	7.3
Expected return on plan assets		(10.3)		(11.6)	(12.9)
Amortization of net actuarial loss		4.7		5.7	6.9
Settlements		(0.1)	[2]	0.0	0.0
Net periodic benefit cost		3.8		2.4	1.6
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income [Abstract]
Net actuarial gain		1.7		2.1	11.4
Amortization of net actuarial loss		3.9	[3]	5.7	8.6	[3]
Total recognized in other comprehensive income		5.6		7.8	20.0
Pension Plans [Member] | Austrian Air-Cooled Automotive Business [Member]
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income [Abstract]
Write-off of net actuarial losses					1.7
Pension Plans [Member] | Non-U.S Plans [Member] | Maximum [Member]
Net Periodic Benefit Cost [Abstract]
Amortization of net actuarial loss		1.0		$ 1.0	$ 1.0
Pension Plans [Member] | Non-U.S Plans [Member] | Germany Automotive Businesses [Member]
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income [Abstract]
Write-off of net actuarial gains		$ 0.6

[1] Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.

[2] The settlement charges resulted from activity associated with the Company’s non-U.S. pension plans.

[3] The fiscal 2024 amount includes $0.6 million of net actuarial gains written-off as a result of the sale of the Germany automotive businesses. The fiscal 2022 amount includes $1.7 million of net actuarial losses written-off as a result of the sale of the Austrian air-cooled automotive business.  See Note 2 for additional information on the sale of these businesses.