INCOME TAXES - Components of provision (benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Current:
Federal	$ 0.2	$ 0.4	$ (30.0)
State and local	9.8	1.1	(2.7)
Foreign	67.0	129.0	131.5
Total	77.0	130.5	98.8
Deferred:
Federal	25.2	(256.9)	(91.7)
State and local	(0.7)	(24.2)	(9.9)
Foreign	(126.2)	(108.9)	(37.6)
Total	(101.7)	(390.0)	(139.2)
Benefit for income taxes	$ (24.7)	$ (259.5)	$ (40.4)