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Investment Income
12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Investment Income
3. INVESTMENT INCOME

 

     UNITED STATES DOLLAR  
     2017      2016      2015  
            Restated1      Restated1  

Interest received – environmental trust funds

     0.5        1.0        0.4  

Interest received – cash balances

     5.1        7.3        5.9  
  

 

 

    

 

 

    

 

 

 

Total investment income

     5.6        8.3        6.3