Other Non-Operating (Income) Expenses, Net - Components of Other Non-Operating Expenses, 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]
Losses from equity method investments	$ 1.5	$ 1.4	$ 5.3	$ 5.1
Foreign currency transaction (gain) loss	0.4	(0.7)	3.3	(0.7)
Other (gains) losses	(9.3)	0.0	(9.3)	0.0
Other non-operating (income) expenses, net	$ (7.4)	$ 0.7	$ (0.8)	$ 4.4