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Trade and Other Payables (Tables)
 12 Months Ended
Dec. 31, 2018
Text block [abstract]  
Summary of Trade and Other Payables
     

          December 31
2018

$

     

          December 31
2017

$

  

Trade accounts payable

      222.6        367.1  

Employee and payroll liabilities

      263.3        248.8  

Accrued liabilities

      81.3        88.7  

Trade and other payables

      567.2        704.6