Income Taxes - Schedule of Provision (Benefit) for Income Taxes from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Current:
Federal	$ 8.6	$ (14.7)	$ (37.3)
State	2.6	0.1	(0.6)
Foreign	5.3	3.7	3.2
Total current	16.5	(10.9)	(34.7)
Deferred:
Federal	(0.9)	(1.0)	(22.6)
State	(0.5)	(2.7)	(10.5)
Foreign	1.0	0.6	(0.5)
Total deferred	(0.4)	(3.1)	(33.6)
Total income tax expense (benefit)	$ 16.1	$ (14.0)	$ (68.3)