DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Summary of Notional Amounts and Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Designated as Hedging Instrument
Derivative [Line Items]
Total	$ (20.7)	$ (8.0)
Gross Notional Amount	2,334.8	2,665.4
Not Designated as Hedging Instrument
Derivative [Line Items]
Total	(1.0)	1.4
Gross Notional Amount	320.9	412.9
Other current assets \| Designated as Hedging Instrument \| Foreign Exchange Contracts
Derivative [Line Items]
Derivative asset fair value	9.2	11.2
Gross Notional Amount	793.6	920.0
Other current assets \| Designated as Hedging Instrument \| Cross-currency Swaps
Derivative [Line Items]
Derivative asset fair value	0.0	0.0
Gross Notional Amount	0.0	0.0
Other current assets \| Not Designated as Hedging Instrument \| Foreign Exchange Contracts
Derivative [Line Items]
Derivative asset fair value	0.5	1.4
Gross Notional Amount	1.3	412.9
Other current assets \| Not Designated as Hedging Instrument \| Cross-currency Swaps
Derivative [Line Items]
Derivative asset fair value	0.0	0.0
Gross Notional Amount	0.0	0.0
Other current liabilities \| Designated as Hedging Instrument \| Foreign Exchange Contracts
Derivative [Line Items]
Liabilities at fair value	(3.9)	(9.8)
Gross Notional Amount	928.0	1,184.6
Other current liabilities \| Designated as Hedging Instrument \| Cross-currency Swaps
Derivative [Line Items]
Liabilities at fair value	(26.0)	(9.4)
Gross Notional Amount	613.2	560.8
Other current liabilities \| Not Designated as Hedging Instrument \| Foreign Exchange Contracts
Derivative [Line Items]
Liabilities at fair value	(1.5)	0.0
Gross Notional Amount	319.6	0.0
Other current liabilities \| Not Designated as Hedging Instrument \| Cross-currency Swaps
Derivative [Line Items]
Liabilities at fair value	0.0	0.0
Gross Notional Amount	$ 0.0	$ 0.0

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Nominal or face amount used to calculate payment on derivative.

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