Interest Expense, Net - Components of Interest Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Interest expense on borrowings	$ (16.7)	$ (11.7)	$ (46.3)	$ (33.3)
Interest income	0.5	1.7	3.2	2.9
Interest expense, net	$ (16.2)	$ (10.0)	$ (43.2)	$ (30.4)