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Trade accounts receivables - Roll-forward of the expected credit losses (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Opening Balance R$ 95,053 R$ 105,989
Closing Balance 97,934 95,053
Trade accounts receivable    
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Opening Balance 31,962 21,109
(Provisions)/Reversals, net (2,585) (35,202)
Utilisation Allowance Account For Credit Losses Financial Assetss 5,790 24,230
Increase Decrease In Allowance Account For Credi tLosses Financial Assets 1,543 (119)
Closing Balance R$ 30,300 R$ 31,962