EMPLOYEE BENEFIT PLANS - Amount Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 1.5	$ 1.5
Current liabilities	(11.2)	(4.7)
Noncurrent liabilities	(400.3)	(447.7)
Funded status	(410.0)	(450.9)
AOC(L)/I	8.7	(10.1)
Net amount recognized	(401.3)	(461.0)
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(3.0)	(2.5)
Noncurrent liabilities	(50.2)	(54.9)
Funded status	(53.2)	(57.4)
AOC(L)/I	8.3	10.0
Net amount recognized	(44.9)	(47.4)
United States | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(1.3)	(1.4)
Noncurrent liabilities	(17.2)	(16.3)
Funded status	(18.5)	(17.7)
AOC(L)/I	(0.7)	0.2
Net amount recognized	(19.2)	(17.5)
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	1.5	1.5
Current liabilities	(6.9)	(0.8)
Noncurrent liabilities	(332.9)	(376.5)
Funded status	(338.3)	(375.8)
AOC(L)/I	1.1	(20.3)
Net amount recognized	$ (337.2)	$ (396.1)