Interest Expense, Net - Components of Interest Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Interest expense on borrowings	$ 11.0	$ 7.0	$ 21.7	$ 13.7
Interest income	(0.3)	(0.5)	(0.7)	(1.0)
Interest expense, net	$ 10.6	$ 6.4	$ 21.0	$ 12.7