Income Taxes - Schedule of Provision (Benefit) for Income Taxes from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Current:
Federal	$ 30.4	$ 8.6	$ (14.7)
State	4.2	2.6	0.1
Foreign	3.8	5.3	3.7
Total current	38.4	16.5	(10.9)
Deferred:
Federal	(10.1)	(0.9)	(1.0)
State	(2.7)	(0.5)	(2.7)
Foreign	(0.5)	1.0	0.6
Total deferred	(13.3)	(0.4)	(3.1)
Total income tax expense (benefit)	$ 25.1	$ 16.1	$ (14.0)