Other Financial Instruments and Fair Value Measurements (Details) - USD ($) $ in Millions		Jul. 31, 2025	Apr. 30, 2025
Carrying amount and fair value of financial instruments
Total long-term debt	[1]	$ (7,038.3)	$ (7,036.8)
Carrying Amount [Member]
Carrying amount and fair value of financial instruments
Marketable securities and other investments		20.1	20.0
Derivative financial instruments – net		(117.1)	62.1
Total long-term debt		(7,038.3)	(7,036.8)
Fair Value [Member]
Carrying amount and fair value of financial instruments
Marketable securities and other investments		20.1	20.0
Derivative financial instruments – net		(117.1)	62.1
Total long-term debt		$ (6,987.6)	$ (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.