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DERIVATIVE FINANCIAL INSTRUMENTS - Additional Information (Details)
kr in Millions, $ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2019
DKK (kr)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
DKK (kr)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
DKK (kr)
Dec. 31, 2017
USD ($)
Disclosure of detailed information about financial instruments [line items]                  
Cash collateral         $ 13.0   $ 3.5    
Bunker swaps                  
Disclosure of detailed information about financial instruments [line items]                  
Notional amount         4,725.0   10,400.0    
Forward exchange contracts (USD/DKK)                  
Disclosure of detailed information about financial instruments [line items]                  
Fair value of derivatives net gain (loss) of a previously fixed hedge         (0.4)        
Notional amount | kr       kr 222.5   kr 250.0   kr 257.0  
Interest rate swaps                  
Disclosure of detailed information about financial instruments [line items]                  
Fair value of derivatives net gain (loss) of a previously fixed hedge         (11.1)        
Notional amount         $ 597.8   $ 512.8   $ 406.4
Fair value adjustments on hedging instruments $ (11.7) $ (13.0) $ (0.7)