Other Financial Instruments and Fair Value Measurements (Details) - USD ($) $ in Millions		Oct. 31, 2025	Apr. 30, 2025
Carrying amount and fair value of financial instruments
Total long-term debt	[1]	$ (7,039.8)	$ (7,036.8)
Carrying Amount [Member]
Carrying amount and fair value of financial instruments
Marketable securities and other investments		19.9	20.0
Derivative financial instruments – net		(47.5)	62.1
Total long-term debt		(7,039.8)	(7,036.8)
Fair Value [Member]
Carrying amount and fair value of financial instruments
Marketable securities and other investments		19.9	20.0
Derivative financial instruments – net		(47.5)	62.1
Total long-term debt		$ (7,098.4)	$ (7,242.0)

[1] Represents the carrying amount included in the Condensed Consolidated Balance Sheets, which includes the impact of capitalized debt issuance costs, offering discounts, and terminated interest rate contracts.