Leases (Details 1) - USD ($) $ in Millions		12 Months Ended
		Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Leases [Abstract]
Operating lease cost		$ 49.7	$ 42.2	$ 43.8
Finance lease cost:
Amortization of right-of-use assets		3.4	1.6	2.0
Interest on lease liabilities		0.6	0.1	0.1
Variable lease cost		23.7	24.9	21.6
Short-term lease cost		44.3	44.5	43.5
Total lease cost	[1]	$ 121.7	$ 113.3	$ 111.0

[1] Total lease cost does not include sublease income, which is immaterial for all years presented.