EMPLOYEE BENEFIT PLANS - Amount recognized in Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 1.1	$ 0.5
Current liabilities	(8.9)	(8.1)
Noncurrent liabilities	(533.3)	(549.2)
Funded status	(541.1)	(556.8)
AOC(L)/I	66.5	51.5
Net amount recognized	(474.6)	(505.3)
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(2.1)	(1.9)
Noncurrent liabilities	(50.7)	(61.5)
Funded status	(52.8)	(63.4)
AOC(L)/I	20.1	23.9
Net amount recognized	(32.7)	(39.5)
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(1.3)	(1.3)
Noncurrent liabilities	(16.2)	(17.5)
Funded status	(17.5)	(18.8)
AOC(L)/I	1.7	2.5
Net amount recognized	(15.8)	(16.3)
International Plan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	1.1	0.5
Current liabilities	(5.5)	(4.9)
Noncurrent liabilities	(466.4)	(470.2)
Funded status	(470.8)	(474.6)
AOC(L)/I	44.7	25.1
Net amount recognized	$ (426.1)	$ (449.5)