EMPLOYEE BENEFIT PLANS - Amounts in AOCI to be amortized (Details) $ in Millions	Jun. 30, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) credit	$ 5.7
Net loss	(0.5)
Total	5.2
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) credit	5.9
Net loss	0.2
Total	6.1
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) credit	0.0
Net loss	0.6
Total	0.6
International Plan
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) credit	(0.2)
Net loss	(1.3)
Total	$ (1.5)