FINANCIAL INSTRUMENTS - Gross Notional Amounts for Outstanding Derivatives (Details) - Forward contracts - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivatives Designated as Hedging Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amounts of outstanding currency forward contracts	$ 160.2	$ 154.5
Derivatives Designated as Hedging Instruments | Prepaids and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amounts of outstanding currency forward contracts	2.5	1.3
Derivatives Designated as Hedging Instruments | Other accrued liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amounts of outstanding currency forward contracts	0.4	0.5
Derivatives Not Designated as Hedging Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amounts of outstanding currency forward contracts	225.7	227.2
Derivatives Not Designated as Hedging Instruments | Prepaids and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amounts of outstanding currency forward contracts	3.0	2.2
Derivatives Not Designated as Hedging Instruments | Other accrued liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amounts of outstanding currency forward contracts	$ 1.1	$ 0.7