Income Taxes - Schedule of Provision (Benefit) for Income Taxes from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Current:
Federal	$ (24.5)	$ 4.7	$ (39.3)
State	(1.1)	0.4	1.2
Foreign	7.2	4.3	8.1
Total current	(18.4)	9.4	(30.0)
Deferred:
Federal	38.7	0.1	60.2
State	3.5	0.5	0.1
Foreign	(0.6)	0.2	0.1
Total deferred	41.6	0.8	60.4
Total income tax expense	$ 23.2	$ 10.2	$ 30.4