EMPLOYEE BENEFIT PLANS - Amount Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 1.5	$ 1.1
Current liabilities	(4.7)	(8.9)
Noncurrent liabilities	(593.5)	(533.3)
Funded status	(596.7)	(541.1)
AOC(L)/I	(10.1)	66.5
Net amount recognized	(606.8)	(474.6)
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(2.5)	(2.1)
Noncurrent liabilities	(54.9)	(50.7)
Funded status	(57.4)	(52.8)
AOC(L)/I	10.0	20.1
Net amount recognized	(47.4)	(32.7)
United States | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(1.4)	(1.3)
Noncurrent liabilities	(16.3)	(16.2)
Funded status	(17.7)	(17.5)
AOC(L)/I	0.2	1.7
Net amount recognized	(17.5)	(15.8)
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	1.5	1.1
Current liabilities	(0.8)	(5.5)
Noncurrent liabilities	(522.3)	(466.4)
Funded status	(521.6)	(470.8)
AOC(L)/I	(20.3)	44.7
Net amount recognized	$ (541.9)	$ (426.1)