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Taxes (Details 5) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Notes and other explanatory information [abstract]    
Provision for allocation of PIS and Cofins credits, beginning R$ 1,909,775  
Transfer to sectorial financial liabilities (1,182,915) R$ (1,462,673)
Provision for allocation of PIS and Cofins credits, ending 1,000,588 1,909,775
Current provision for allocation of PIS and COFINS credits 580,000 R$ 0
Non-Current provision for allocation of PIS and COFINS credits R$ 1,000,588