| New issue under the Incentive Plan | 
                      2025 | 
                      June | 
                      26,458,594  | 
                      313,989,003 | 
                      126,261,329 | 
                      816,723,267 | 
                  
                      
                      | Conversion of 22,833 common shares (A to B) | 
                      2025 | 
                      March | 
                      26,458,594  | 
                      313,965,865 | 
                      126,261,329 | 
                      816,700,129 | 
                  
                      
                      | Conversion of 12,739 common shares (A to B) | 
                      2024 | 
                      August  | 
                      26,481,427 | 
                      313,943,032 | 
                      126,261,329 | 
                      816,700,129 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2024 | 
                      June | 
                      26,494,166 | 
                      313,930,293 | 
                      126,261,329 | 
                      816,700,129 | 
                  
                      
                      | Conversion of 8,674 common shares (A to B) | 
                      2024 | 
                      May | 
                      26,494,166 | 
                      313,840,489 | 
                      126,261,329 | 
                      816,542,972 | 
                  
                      
                      | Conversion of 12,577 common shares (A to B) | 
                      2024 | 
                      April | 
                      26,502,840 | 
                      313,831,815 | 
                      126,261,329 | 
                      816,542,972 | 
                  
                      
                      | Conversion of 24,917 common shares (A to B) | 
                      2024 | 
                      January | 
                      26,515,417 | 
                      313,819,238 | 
                      126,261,329 | 
                      816,542,972 | 
                  
                      
                      | New issue | 
                      2023 | 
                      November | 
                      26,540,334 | 
                      313,794,321 | 
                      126,261,329 | 
                      816,542,972 | 
                  
                      
                      | Conversion of 25,424 common shares (A to B) | 
                      2023 | 
                      September | 
                      26,540,334 | 
                      303,794,321 | 
                      126,261,329 | 
                      799,042,972 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2023 | 
                      July | 
                      26,565,758 | 
                      303,768,897 | 
                      126,261,329 | 
                      799,042,972 | 
                  
                      
                      | New issue | 
                      2023 | 
                      June | 
                      26,565,758 | 
                      303,454,259 | 
                      126,261,329 | 
                      798,492,356 | 
                  
                      
                      | Conversion of 29,468 common shares (A to B) | 
                      2023 | 
                      March | 
                      26,565,758 | 
                      293,454,259 | 
                      126,261,329 | 
                      780,992,355 | 
                  
                      
                      | Conversion of 54,286 common shares (A to B) | 
                      2023 | 
                      January | 
                      26,595,226 | 
                      293,424,791 | 
                      126,261,329 | 
                      780,992,355 | 
                  
                      
                      | Conversion of 86,634 common shares (A to B) | 
                      2022 | 
                      December | 
                      26,600,654 | 
                      293,419,363 | 
                      126,261,329 | 
                      780,992,355 | 
                  
                      
                      | Conversion of 145,566 common shares (A to B) | 
                      2022 | 
                      August | 
                      26,687,288 | 
                      293,332,729 | 
                      126,261,329 | 
                      780,992,355 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2022 | 
                      June | 
                      26,832,854 | 
                      293,187,163 | 
                      126,261,329 | 
                      780,992,355 | 
                  
                      
                      | Conversion of 30 common shares (A to B) | 
                      2021 | 
                      August | 
                      26,832,854 | 
                      292,820,741 | 
                      126,261,329 | 
                      780,351,117 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2021 | 
                      July | 
                      26,832,884 | 
                      292,820,711 | 
                      126,261,329 | 
                      780,351,117 | 
                  
                      
                      | Redemption of preference shares | 
                      2021 | 
                      April | 
                      26,832,884 | 
                      292,446,646 | 
                      126,261,329 | 
                      779,696,503 | 
                  
                      
                      | Conversion of 400 common shares (A to B) | 
                      2020 | 
                      August | 
                      26,832,884 | 
                      292,446,646 | 
                      125,800,000 | 
                      808,261,226 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2020 | 
                      June | 
                      26,833,284 | 
                      292,446,246 | 
                      125,800,000 | 
                      808,261,226 | 
                  
                      
                      | New issue Class D Shares | 
                      2020 | 
                      June | 
                      26,833,284 | 
                      292,158,127 | 
                      125,800,000 | 
                      807,757,018 | 
                  
                      
                      | Conversion of 260 common shares (A to B) | 
                      2020 | 
                      May | 
                      26,833,284 | 
                      292,158,127 | 
                      107,800,000 | 
                      776,257,018 | 
                  
                      
                      | Conversion of 100 common shares A-series to 100 common shares B-series | 
                      2019 | 
                      September | 
                      26,833,544 | 
                      292,157,867 | 
                      107,800,000 | 
                      776,257,018 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2019 | 
                      July | 
                      26,833,644 | 
                      292,157,767 | 
                      107,800,000 | 
                      776,257,018 | 
                  
                      
                      | Bonus issue Class A and B shares | 
                      2019 | 
                      June | 
                      26,833,644 | 
                      291,958,810 | 
                      107,800,000 | 
                      775,908,843 | 
                  
                      
                      | New issue Class D shares | 
                      2019 | 
                      May | 
                      13,416,822 | 
                      145,979,405 | 
                      107,800,000 | 
                      496,965,446 | 
                  
                      
                      | Private placement | 
                      2018 | 
                      November | 
                      13,416,822 | 
                      145,979,405 | 
                      101,900,000 | 
                      486,640,446 | 
                  
                      
                      | Private placement | 
                      2018 | 
                      November | 
                      13,416,822 | 
                      145,979,405 | 
                      101,900,000 | 
                      486,640,446 | 
                  
                      
                      | Rights issue Class D shares | 
                      2018 | 
                      June | 
                      13,416,822 | 
                      145,979,405 | 
                      97,000,000 | 
                      478,065,447 | 
                  
                      
                      | New issue under the Incentive Plan | 
                      2018 | 
                      June | 
                      13,416,822 | 
                      145,979,405 | 
                      63,563,169 | 
                      419,550,992 | 
                  
                      
                      | Offset issue Class D shares | 
                      2017 | 
                      June | 
                      13,416,822 | 
                      145,858,130 | 
                      63,563,169 | 
                      419,338,761 | 
                  
                      
                      | Cancellation of shares | 
                      2017 | 
                      June | 
                      13,416,822 | 
                      145,858,130 | 
                      18,250,000 | 
                      340,040,715 | 
                  
                      
                      | New issue Class D shares | 
                      2016 | 
                      November | 
                      13,416,822 | 
                      145,858,130 | 
                      18,250,000 | 
                      412,666,166 | 
                  
                      
                      | New issue preference shares | 
                      2015 | 
                      March | 
                      13,416,822 | 
                      145,858,130 | 
                      - | 
                      380,668,666 | 
                  
                      
                      | New issue preference shares | 
                      2014 | 
                      December | 
                      13,416,822 | 
                      145,858,130 | 
                      - | 
                      375,856,166 | 
                  
                      
                      | New issue preference shares | 
                      2014 | 
                      April | 
                      13,416,822 | 
                      145,858,130 | 
                      - | 
                      371,481,166 | 
                  
                      
                      | New issue Class B shares | 
                      2013 | 
                      June | 
                      13,416,822 | 
                      145,858,130 | 
                      - | 
                      366,231,166 | 
                  
                      
                      | Bonus issue Class B shares | 
                      2013 | 
                      March | 
                      13,416,822 | 
                      134,168,220 | 
                      - | 
                      345,773,824 | 
                  
                      
                      | New issue preference shares | 
                      2012 | 
                      December | 
                      13,416,822 | 
                      - | 
                      - | 
                      317,084,110 | 
                  
                      
                      | New issue Class A shares | 
                      2011 | 
                      March | 
                      13,416,822 | 
                      - | 
                      - | 
                      253,344,220 | 
                  
                      
                      | New issue Class A shares | 
                      2011 | 
                      January | 
                      12,906,164 | 
                      - | 
                      - | 
                      250,790,930 | 
                  
                      
                      | New issue Class A shares | 
                      2010 | 
                      December | 
                      12,729,039 | 
                      - | 
                      - | 
                      249,905,305 | 
                  
                      
                      | New issue Class A shares | 
                      2010 | 
                      November | 
                      12,367,008 | 
                      - | 
                      - | 
                      248,095,150 | 
                  
                      
                      | New issue preference shares | 
                      2010 | 
                      July | 
                      12,077,322 | 
                      - | 
                      - | 
                      246,646,720 | 
                  
                      
                      | New issue preference shares | 
                      2010 | 
                      April | 
                      12,077,322 | 
                      - | 
                      - | 
                      237,883,985 | 
                  
                      
                      | New issue preference shares | 
                      2009 | 
                      June | 
                      12,077,322 | 
                      - | 
                      - | 
                      163,412,990 | 
                  
                      
                      | Non-cash issue preference shares | 
                      2009 | 
                      April | 
                      12,077,322 | 
                      - | 
                      - | 
                      143,412,990 | 
                  
                      
                      | Non-cash issue preference shares | 
                      2009 | 
                      April | 
                      12,077,322 | 
                      - | 
                      - | 
                      142,712,990 | 
                  
                      
                      | New issue preference shares | 
                      2008 | 
                      December | 
                      12,077,322 | 
                      - | 
                      - | 
                      135,837,990 | 
                  
                      
                      | New issue preference shares | 
                      2007 | 
                      December | 
                      12,077,322 | 
                      - | 
                      - | 
                      135,185,815 | 
                  
                      
                      | Non-cash issue preference shares | 
                      2007 | 
                      December | 
                      12,077,322 | 
                      - | 
                      - | 
                      120,185,815 | 
                  
                      
                      | New issue Class A shares | 
                      2007 | 
                      October | 
                      12,077,322 | 
                      - | 
                      - | 
                      118,365,815 | 
                  
                      
                      | New issue Class A shares | 
                      2007 | 
                      June | 
                      12,027,322 | 
                      - | 
                      - | 
                      118,115,815 | 
                  
                      
                      | New issue preference shares | 
                      2006 | 
                      December | 
                      11,916,822 | 
                      - | 
                      - | 
                      117,563,315 | 
                  
                      
                      | New issue preference shares | 
                      2006 | 
                      May | 
                      11,916,822 | 
                      - | 
                      - | 
                      97,563,315 | 
                  
                      
                      | Bonus issue preference shares | 
                      2006 | 
                      February | 
                      11,916,822 | 
                      - | 
                      - | 
                      92,563,315 | 
                  
                      
                      | New issue preference shares | 
                      2006 | 
                      January | 
                      11,916,822 | 
                      - | 
                      - | 
                      89,584,110 | 
                  
                      
                      | New issue Class A shares | 
                      2006 | 
                      January | 
                      11,916,822 | 
                      - | 
                      - | 
                      59,584,110 | 
                  
                      
                      | New issue Class A shares | 
                      2005 | 
                      June | 
                      11,866,822 | 
                      - | 
                      - | 
                      59,334,110 | 
                  
                      
                      | Consolidation 1:10 Class A shares | 
                      2004 | 
                      July | 
                      10,866,822 | 
                      - | 
                      - | 
                      54,334,110 | 
                  
                      
                      | Non-cash issue Class A shares | 
                      2004 | 
                      July | 
                      108,668,220 | 
                      - | 
                      - | 
                      54,334,110 | 
                  
                      
                      | New issue/conv. Bonds | 
                      2000 | 
                      Sept-Dec | 
                      54,942,650 | 
                      - | 
                      - | 
                      27,471,325 | 
                  
                      
                      | New issue common shares | 
                      2000 | 
                      July | 
                      54,329,525 | 
                      - | 
                      - | 
                      27,164,762 | 
                  
                      
                      | Split 5:1 Class A shares | 
                      2000 | 
                      May | 
                      52,679,525 | 
                      - | 
                      - | 
                      26,339,762 | 
                  
                      
                      | New issue Class A shares | 
                      2000 | 
                      May | 
                      10,535,905 | 
                      - | 
                      - | 
                      26,339,762 | 
                  
                      
                      | Bonus issue Class A shares | 
                      2000 | 
                      April | 
                      10,410,905 | 
                      - | 
                      - | 
                      26,027,262 | 
                  
                      
                      | New issue Class A shares | 
                      1999 | 
                      December | 
                      10,410,905 | 
                      - | 
                      - | 
                      21,602,726 | 
                  
                      
                      | Split 5:1 Class A shares | 
                      1999 | 
                      November | 
                      9,210,905 | 
                      - | 
                      - | 
                      2,302,726 | 
                  
                      
                      | New issue Class A shares | 
                      1999 | 
                      April | 
                      1,842,181 | 
                      - | 
                      - | 
                      2,302,726 |