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Change in Working Capital (Tables)
 12 Months Ended
Dec. 31, 2018
Text block [abstract]  
Summary of Change in Working Capital
   CHANGE IN WORKING CAPITAL         
   Inventories      0.8        (55.1 )       (39.2 ) 
   Trade and other receivables      15.0        (2.2 )       2.8  
   Trade and other payables      (32.1 )       (12.1 )       34.1  
     

 

 

     

 

 

     

 

 

  
   Total change in working capital      (16.3 )       (69.4 )       (2.3 )