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Trade accounts and notes receivable (Details 1) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Notes and other explanatory information [abstract]    
Beginning balance R$ (604,167) R$ (638,583)
(Additions) Reversals (32,809) (12,772)
Write-offs 8,539 10,744
Exchange rate variation 36,958 36,444
Ending balance R$ (591,479) R$ (604,167)