Derivative Financial Instruments (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Price Risk Derivatives [Abstract]
Net derivative gains (losses) recognized and classified as unallocated	$ 60.8	$ 22.1	$ (166.3)	$ (7.7)
Less: Net derivatives gains (losses) reclassified to segment operating profit	(42.2)	10.4	(16.2)	10.6
Change in net cumulative unallocated derivative gains and losses	$ 103.0	$ 11.7	$ (150.1)	$ (18.3)