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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Summary of Notional Amounts and Fair Value (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Derivative [Line Items]  
Gross notional amount $ 1,184.8
Derivative, Fair Value, Net 5.6
Other current assets  
Derivative [Line Items]  
Derivative asset fair value 5.6
Other current liabilities  
Derivative [Line Items]  
Liabilities at fair value 0.0
Designated as Hedging Instrument  
Derivative [Line Items]  
Gross notional amount 805.1
Derivative, Fair Value, Net 3.5
Designated as Hedging Instrument | Other current assets  
Derivative [Line Items]  
Derivative asset fair value 3.5
Designated as Hedging Instrument | Other current liabilities  
Derivative [Line Items]  
Liabilities at fair value 0.0
Not Designated as Hedging Instrument  
Derivative [Line Items]  
Gross notional amount 379.7
Derivative, Fair Value, Net 2.1
Not Designated as Hedging Instrument | Other current assets  
Derivative [Line Items]  
Derivative asset fair value 2.1
Not Designated as Hedging Instrument | Other current liabilities  
Derivative [Line Items]  
Liabilities at fair value $ 0.0