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Cash and cash equivalents (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of cash and cash equivalents
                 
         

Average rate

(1)

        
          12.31.23   12.31.22
Cash and bank accounts                  
Brazilian reais         -    160,310   154,399
Saudi riyal         -    307,151   307,440
U.S. dollar         -    768,868   946,999
Euro         -   24,506     93,321
Turkish lira         -   93,641     83,339
Other currencies         -    252,781   279,579
                1,607,257    1,865,077
Cash equivalents                  
In Brazilian reais                  
Investment funds         11.65%     4,676    3,492
Bank deposit certificates         11.89%     4,876,861    3,754,202
                4,881,537    3,757,694
In U.S. Dollar                  
Term deposit         5.82%     2,069,531    2,469,028
Overnight         1.74%   17,570     12,720
Other currencies                  
Term deposit (Saudi riyal)         6.15%    612,110     -
Term deposit (2)             76,659     26,410
                2,775,870    2,508,158
                9,264,664    8,130,929
(1)Weighted average annual rate.
(2)Amounts are substantially denominated in Turkish Lira (TRY) at a weighted average annual rate of 43.00% (14.79% on December 31, 2022).