Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Cost of sales	$ 2,108.5	$ 2,175.4	$ 2,213.0
Amount of gain (loss) reclassified from AOCI to income	(4.2)	(11.0)	7.7
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Total loss	(4.2)	(11.0)
Commodity Contract | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) reclassified from AOCI to income	$ (4.2)	$ (11.0)	$ 7.7