EMPLOYEE BENEFIT PLANS - Pre-tax amounts recognized in AOCI (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	$ 31.6	$ (79.9)
Prior service (cost) credit	19.9	25.7
Total recognized in AOC(L)/I	51.5	(54.2)
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	1.7	(0.1)
Prior service (cost) credit	22.2	28.1
Total recognized in AOC(L)/I	23.9	28.0
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	2.5	(15.5)
Prior service (cost) credit	0.0	0.0
Total recognized in AOC(L)/I	2.5	(15.5)
International Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain	27.4	(64.3)
Prior service (cost) credit	(2.3)	(2.4)
Total recognized in AOC(L)/I	$ 25.1	$ (66.7)