Derivative Financial Instruments (Details 2) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Gains and losses recognized in cost of products sold on derivatives not designated as qualified hedging instruments
Total derivative gains (losses) recognized in costs of products sold	$ (1.7)	$ 78.3	$ 92.6
Commodity contracts
Gains and losses recognized in cost of products sold on derivatives not designated as qualified hedging instruments
Total derivative gains (losses) recognized in costs of products sold	(6.1)	74.1	101.4
Foreign currency exchange contracts
Gains and losses recognized in cost of products sold on derivatives not designated as qualified hedging instruments
Total derivative gains (losses) recognized in costs of products sold	$ 4.4	$ 4.2	$ (8.8)