Income Taxes - Schedule of Income Before Income Taxes for the Company's Domestic and Foreign Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Domestic	$ 454.5	$ 224.1	$ 51.2
Foreign	12.8	(12.5)	21.3
Income before income taxes	$ 467.3	$ 211.6	$ 72.5