FINANCIAL INSTRUMENTS AND DERIVATIVES - NET INVESTMENT HEDGES (Details) - Designated as Hedging Instrument $ in Millions	Jun. 30, 2018 USD ($)
Derivative [Line Items]
Aggregate Notional Amount	$ 887.1
Aggregate Notional Amount Maturing within 12 Months	299.5
Net Investment Hedging | Foreign exchange forward contracts
Derivative [Line Items]
Aggregate Notional Amount	600.6
Aggregate Notional Amount Maturing within 12 Months	299.5
Net Investment Hedging | Cross currency basis swaps
Derivative [Line Items]
Aggregate Notional Amount	286.5
Aggregate Notional Amount Maturing within 12 Months	$ 0.0