Income Taxes - Schedule of Provision (Benefit) for Income Taxes from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Current:
Federal, current	$ 4.7	$ (39.3)	$ 61.3
State, current	0.4	1.2	6.5
Foreign, current	4.3	8.1	5.5
Total current	9.4	(30.0)	73.3
Deferred:
Federal, deferred	0.1	60.2	(8.0)
State, deferred	0.5	0.1	(1.4)
Foreign, deferred	0.2	0.1	(0.3)
Total deferred	0.8	60.4	(9.7)
Total income tax expense	$ 10.2	$ 30.4	$ 63.6