EMPLOYEE BENEFIT PLANS - Pre-tax Amounts Recognized in AOCI (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	$ (29.2)	$ 52.2
Prior service credit (cost)	19.1	14.3
Total recognized in AOC(L)/I	(10.1)	66.5
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	(0.4)	3.8
Prior service credit (cost)	10.4	16.3
Total recognized in AOC(L)/I	10.0	20.1
United States \| Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	0.2	1.7
Prior service credit (cost)	0.0	0.0
Total recognized in AOC(L)/I	0.2	1.7
International \| Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	(29.0)	46.7
Prior service credit (cost)	8.7	(2.0)
Total recognized in AOC(L)/I	$ (20.3)	$ 44.7

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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