EMPLOYEE BENEFIT PLANS - Amounts in AOCI to be Amortized (Details) $ in Millions	Jun. 30, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	$ 6.7
Net gain (loss)	(0.5)
Total	6.2
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	5.9
Net gain (loss)	0.1
Total	6.0
United States | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	0.0
Net gain (loss)	(0.7)
Total	(0.7)
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	0.8
Net gain (loss)	0.1
Total	$ 0.9