Income Taxes - Schedule of Provision (Benefit) for Income Taxes from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Current:
Federal	$ 1.3	$ 23.2	$ 22.6
State	1.8	4.4	3.5
Foreign	1.9	4.9	6.7
Total current	5.0	32.5	32.8
Deferred:
Federal	(1.8)	13.1	(66.0)
State	0.3	3.6	4.8
Foreign	1.1	(0.2)	0.1
Total deferred	(0.4)	16.5	(61.1)
Total income tax expense (benefit)	$ 4.6	$ 49.0	$ (28.3)