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Note 8 - Exceptional Items (Tables)
 12 Months Ended
Dec. 31, 2018
Statement Line Items [Line Items]  
Disclosure of exceptional items included in the income statement [text block]
      2018       2017       2016  
Result through exchange transaction of shareholdings
(i)
    
30.0
      
–
      
1,240.0
  
Restructuring (ii)    
(175.5
 )    
(105.5
 )    
(79.8
 )
Result on sale of subsidiary
(iii)
    
78.6
      
–
      
–
  
Acquisition of subsidiary    
(1.5
 )    
–
      
–
  
Effect of application of IAS 29 (hyperinflation)    
(18.0
 )    
–
      
–
  
Others    
–
      
(3.2
 )    
(25.9
 )
     
(86.4
 )    
(108.7
 )    
1,134.3