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23. Earnings per share (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Share Tables  
Earnings per share, basic and diluted
  2017 2016 2015
       
Earnings attributable to Company’s owners 2,519,310 2,947,098 536,279
Weighted average number of common shares issued 683,509,869 683,509,869 683,509,869
       
Basic and diluted earnings per share (reais per share) 3.69 4.31 0.78