Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Current:
U.S. Domestic	$ 51.2	$ 46.7	$ 88.8
Foreign	34.9	33.1	24.7
State	10.5	8.3	15.1
Total current	96.7	88.1	128.7
Deferred:
U.S. Domestic	55.3	33.1	2.2
Foreign	(9.5)	(10.7)	(2.8)
State	6.2	6.5	(2.9)
Total deferred	52.0	29.0	(3.5)
Total Provision for income taxes	$ 148.7	$ 117.0	$ 125.2