EMPLOYEE BENEFIT PLANS - Changes in plan assets and benefit obligations recognized in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	$ 20.8	$ 87.0
Amortization of prior service cost (credit)	(5.7)	(5.7)
Recognized net actuarial loss (gain)	0.5	21.4
Effect of exchange rates	0.4	3.0
Total recognized in OCI/(L)	16.0	105.7
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	2.3	1.4
Amortization of prior service cost (credit)	(5.9)	(5.9)
Recognized net actuarial loss (gain)	(0.1)	0.1
Effect of exchange rates	0.1	0.3
Total recognized in OCI/(L)	(3.6)	(4.1)
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	0.7	0.4
Amortization of prior service cost (credit)	0.0	0.0
Recognized net actuarial loss (gain)	(0.6)	17.6
Effect of exchange rates	0.0	0.0
Total recognized in OCI/(L)	0.1	18.0
International Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	17.8	85.2
Amortization of prior service cost (credit)	0.2	0.2
Recognized net actuarial loss (gain)	1.2	3.7
Effect of exchange rates	0.3	2.7
Total recognized in OCI/(L)	$ 19.5	$ 91.8