Interest Expense, Net - Components of Interest 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]
Interest expense on borrowings	$ 11.7	$ 7.4	$ 33.4	$ 21.1
Interest income	(0.9)	(0.9)	(1.5)	(1.9)
Interest expense, net	$ 10.8	$ 6.5	$ 31.8	$ 19.2