EMPLOYEE BENEFIT PLANS - Amount Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 0.0	$ 1.5
Current liabilities	(5.3)	(11.2)
Noncurrent liabilities	(420.6)	(400.3)
Funded status	(425.9)	(410.0)
AOC(L)/I	(23.2)	8.7
Net amount recognized	(449.1)	(401.3)
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(2.6)	(3.0)
Noncurrent liabilities	(47.6)	(50.2)
Funded status	(50.2)	(53.2)
AOC(L)/I	7.7	8.3
Net amount recognized	(42.5)	(44.9)
United States | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(2.0)	(1.3)
Noncurrent liabilities	(16.9)	(17.2)
Funded status	(18.9)	(18.5)
AOC(L)/I	0.3	(0.7)
Net amount recognized	(18.6)	(19.2)
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	1.5
Current liabilities	(0.7)	(6.9)
Noncurrent liabilities	(356.1)	(332.9)
Funded status	(356.8)	(338.3)
AOC(L)/I	(31.2)	1.1
Net amount recognized	$ (388.0)	$ (337.2)