Other Income (Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Other Income and Expenses [Abstract]
Interest income	$ 0.3	$ 0.2	$ 0.1
Equity in earnings of unconsolidated subsidiaries	0.0	0.6	0.1
Unrealized gains (losses) on company owned life insurance contracts and investments held in rabbi trusts	1.7	(0.5)	0.3
Foreign exchange	(0.4)	(2.4)	0.4
Other	1.2	0.0	4.4
Total other income (expense), net	$ 2.8	$ (2.1)	$ 5.3