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Segment reporting (Tables)
 12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Operating Revenue by Principal Geographic Area

resource allocations. Information concerning operating revenue by geographic area for the period ended December 31 is as follows (in millions):

 

     2017      2016      2015  

North America

    $ 610.0      $ 638.9      $ 559.6  

Panama

      413.5        371.6        374.2  

Central America and the Caribbean

      275.3        273.6        289.0  

Brazil

      363.7        245.4        290.6  

Colombia

      197.9        146.1        174.2  

Others South America

      667.2        546.2        566.1  
  

 

 

     

 

 

     

 

 

  
   $ 2,527.6      $ 2,221.8      $ 2,253.7