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Note 10 - Additional Information on Operating Expenses by Nature (Tables)
 12 Months Ended
Dec. 31, 2018
Statement Line Items [Line Items]  
Disclosure of depreciation and amortisation expense [text block]
    Depreciation and impairment of
property, plant and equipment		   Amortization of intangible assets
      2018       2017       2016       2018       2017       2016  
                                                 
Cost of sales    
2,681.9
      
2,364.7
      
2,283.3
      
10.3
      
6.2
      
4.3
  
Distribution expenses    
225.2
      
197.6
      
200.9
      
–
      
–
      
–
  
Sales and marketing expenses    
581.4
      
532.2
      
538.0
      
117.1
      
142.3
      
222.9
  
Administrative expenses    
231.8
      
231.1
      
182.5
      
175.2
      
142.0
      
95.8
  
     
3,720.3
      
3,325.6
      
3,204.7
      
302.6
      
290.5
      
323.0