Pension and Employee Benefit Plans, Defined Benefit Employee Benefit Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Employer Contributions [Abstract]
Net periodic benefit cost (income)	[1]	$ 3.3	$ 3.0	$ 2.9
Pension Plans [Member]
Employer Contributions [Abstract]
Held for sale pension liabilities		17.8	0.0
Employer contributions		21.5	5.8
Net periodic benefit cost (income)		3.9	3.7	3.6
Pension Plans [Member] | U.S. Plans [Member]
Employer Contributions [Abstract]
Employer contributions		19.3	3.5	8.0
Pension Plans [Member] | Non-U.S Plans [Member]
Employer Contributions [Abstract]
Employer contributions		2.2	2.3	5.9
Postretirement Plans [Member]
Employer Contributions [Abstract]
Net periodic benefit cost (income)		$ (0.3)	$ (0.3)	$ (0.3)

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