Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expenses [Abstract]
Foreign exchange loss	$ (0.9)	$ 0.0	$ (1.0)	$ (2.3)
Unrealized gains (losses) on company-owned life insurance contracts and investments held in rabbi trusts	0.6	(1.3)	1.3	(1.8)
Equity in earnings (losses) of unconsolidated subsidiaries	0.0	(0.2)	0.0	0.6
Other	1.3	0.0	1.7	0.1
Total other income (expense), net	$ 1.0	$ (1.5)	$ 2.0	$ (3.4)