Income Taxes - Schedule of Provision (Benefit) for Income Taxes from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Current:
Federal	$ 89.8	$ 30.4	$ 8.6
State	14.5	4.2	2.6
Foreign	4.4	3.8	5.3
Total current	108.7	38.4	16.5
Deferred:
Federal	(16.1)	(10.1)	(0.9)
State	(1.3)	(2.7)	(0.5)
Foreign	0.0	(0.5)	1.0
Total deferred	(17.4)	(13.3)	(0.4)
Total income tax expense	$ 91.3	$ 25.1	$ 16.1