INTEREST EXPENSE, NET (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Interest Income (Expense), Net [Abstract]
Interest expense		$ 219.6	$ 112.9	$ 71.4
Foreign exchange (gain) losses, net of derivative contracts		3.4	(26.9)	4.1
Deferred financing fees write-off		0.0	0.0	0.9
Interest income		(4.4)	(4.1)	(3.4)
Total interest expense, net		218.6	$ 81.9	$ 73.0
Gain related to short-term forward contracts	$ 11.1	$ 11.1