Restructuring Costs (Details) - 2021 Restructuring Program - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Apr. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 65.0		$ 65.0
Restructuring and Related Cost, Cost Incurred to Date	60.2		60.2
Restructuring and Related Cost, Incurred Cost	1.6	$ 8.8	7.6	$ 22.6
Restructuring and Related Cost, Noncash Charge Incurred to Date	33.2		33.2
Restructuring and Related Cost, Incurred Noncash Charge	3.2	6.7	10.2	15.9
Employee-related costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	25.7		25.7
Restructuring and Related Cost, Incurred Cost	0.3	1.4	2.1	3.8
Restructuring Reserve	0.5		0.5		$ 2.4
Other transition and termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	34.5		34.5
Restructuring and Related Cost, Incurred Cost	$ 1.3	$ 7.4	$ 5.5	$ 18.8