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Financial instruments and risk management (Details 1) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Derivative financial instruments assets, Current R$ 109,222 R$ 120,865
Derivative financial instruments assets, non current 529,830 10,283
Derivative financial instruments laibilities, Current (76,940) (82,468)
Derivative financial instruments laibilities, non current (59,819) (174,699)
Position of derivative financial instruments - net 502,293 (126,019)
Cash flow hedges [member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Derivative financial instruments assets 639,052 131,148
Derivative financial instruments liabilities (136,759) (257,167)
Cash flow hedges [member] | Currency risk [member] | Foreign Exchange Risk On Operating Income [Member]    
IfrsStatementLineItems [Line Items]    
Derivative financial instruments assets 103,558 8,726
Derivative financial instruments liabilities (7,600) (17,551)
Cash flow hedges [member] | Currency risk [member] | Commodities Price Risk [Member]    
IfrsStatementLineItems [Line Items]    
Derivative financial instruments assets 5,510 108,966
Derivative financial instruments liabilities (14,363) (26,730)
Cash flow hedges [member] | Currency risk [member] | Interest rate risk [member]    
IfrsStatementLineItems [Line Items]    
Derivative financial instruments assets 529,830 9,517
Derivative financial instruments liabilities (122,002)
Cash flow hedges [member] | Currency risk [member] | Not Designated Foreign Exchange Risk On Statement Of Financial Position [Member]    
IfrsStatementLineItems [Line Items]    
Derivative financial instruments assets 154 3,939
Derivative financial instruments liabilities (62,647) (6,251)
Cash flow hedges [member] | Currency risk [member] | Foreign Exchange Risk On Statement Of Financial Position [Member]    
IfrsStatementLineItems [Line Items]    
Derivative financial instruments liabilities R$ (52,149) R$ (84,633)