Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Current:
U.S. Domestic	$ 46.7	$ 88.8	$ 89.4
Foreign	33.1	24.7	43.4
State	8.3	15.1	9.6
Total current	88.1	128.7	142.4
Deferred:
U.S. Domestic	33.1	2.2	(13.6)
Foreign	(10.7)	(2.8)	4.9
State	6.5	(2.9)	(0.6)
Total deferred	29.0	(3.5)	(9.3)
Total Provision for income taxes	$ 117.0	$ 125.2	$ 133.1