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FREIGHT RECEIVABLES (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of financial assets [line items]      
Balance at begining of period $ 71.3 $ 62.5  
Balance at end of period 86.0 71.3 $ 62.5
Accumulated impairment      
Disclosure of financial assets [line items]      
Balance at begining of period 1.3 2.6 1.7
Provisions for the year 1.7 0.6 1.9
Provisions reversed during the year (1.0) (1.9) (1.0)
Provisions utilized during the year (0.3) 0.0 0.0
Balance at end of period $ 1.7 $ 1.3 $ 2.6