LONG-TERM DEBT (Debt Issuance Costs - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	May 06, 2015
Debt issuance cost						$ 118.4
Loss on extinguishment of debt	$ (4.5)			$ (4.5)
Accumulated amortization of debt issuance costs	42.7	$ 35.8		42.7
Interest expense associated with the amortization of debt issuance costs	2.5		$ 2.6	$ 6.9	$ 7.6
Unamortized Debt Issuance Costs [Member]
Loss on extinguishment of debt	$ 1.8	$ 11.4