DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Summary of Notional Amounts and Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Designated as Hedging Instrument
Derivative [Line Items]
Total	$ (8.0)	$ (2.3)
Gross Notional Amount	4,174.4	863.0
Not Designated as Hedging Instrument
Derivative [Line Items]
Total	1.4	1.3
Gross Notional Amount	412.9	834.0
Other current assets | Designated as Hedging Instrument | Foreign Exchange Contracts
Derivative [Line Items]
Derivative asset fair value	11.2	0.0
Gross Notional Amount	2,429.0	0.0
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	1.4	1.3
Gross Notional Amount	412.9	834.0
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	(9.8)	(2.3)
Gross Notional Amount	1,184.6	863.0
Other current liabilities | Designated as Hedging Instrument | Cross-currency Swaps
Derivative [Line Items]
Liabilities at fair value	(9.4)	0.0
Gross Notional Amount	560.8	0.0
Other current liabilities | Not Designated as Hedging Instrument | Foreign Exchange Contracts
Derivative [Line Items]
Liabilities at fair value	0.0	0.0
Gross Notional Amount	0.0	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