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LONG-TERM OBLIGATIONS - 2014 Credit Agreement (Details)
€ in Millions, $ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Aug. 13, 2014
USD ($)
Aug. 13, 2014
EUR (€)
Debt Instrument [Line Items]        
Loss on early extinguishment of debt $ 0.7 $ 45.4    
2014 Credit Agreement        
Debt Instrument [Line Items]        
Available borrowing capacity     $ 600.0  
Loss on early extinguishment of debt   $ 8.2    
Line of Credit | Secured Debt | 2014 Credit Agreement        
Debt Instrument [Line Items]        
Line of credit     $ 230.0 € 200.0