FINANCIAL INSTRUMENTS AND DERIVATIVES - CASH FLOW HEDGES (Details) - Designated as Hedging Instrument $ in Millions	Mar. 31, 2019 USD ($)
Derivative [Line Items]
Aggregate Notional Amount	$ 1,061.0
Aggregate Notional Amount Maturing within 12 Months	255.2
Cash Flow Hedging
Derivative [Line Items]
Aggregate Notional Amount	632.7
Aggregate Notional Amount Maturing within 12 Months	392.4
Cash Flow Hedging | Foreign exchange forward contracts
Derivative [Line Items]
Aggregate Notional Amount	369.4
Aggregate Notional Amount Maturing within 12 Months	279.1
Cash Flow Hedging | Interest rate swaps
Derivative [Line Items]
Aggregate Notional Amount	263.3
Aggregate Notional Amount Maturing within 12 Months	$ 113.3