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LONG-TERM DEBT, LETTERS OF CREDIT AND DERIVATIVES - Derivatives and Hedging Narrative (Details)
€ in Millions, $ in Millions
Mar. 31, 2020
USD ($)
Mar. 31, 2020
EUR (€)
May 17, 2018
USD ($)
Not Designated as Hedging Instrument | Long-term debt      
Derivative [Line Items]      
Embedded derivative liability     $ 45.4
Net Investment Hedge      
Derivative [Line Items]      
Borrowing under credit facility $ 13.5 € 12.3