Leases (Details 1) - USD ($) $ in Millions		12 Months Ended
		Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Leases [Abstract]
Operating lease cost		$ 46.2	$ 49.7	$ 42.2
Finance lease cost:
Amortization of right-of-use assets		3.5	3.4	1.6
Interest on lease liabilities		0.6	0.6	0.1
Variable lease cost		23.2	23.7	24.9
Short-term lease cost		45.2	44.3	44.5
Total lease cost	[1]	$ 118.7	$ 121.7	$ 113.3

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