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Financial instruments and risk management (Details 13) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Financial liabilities at amortised cost R$ (21,181,435) R$ (23,900,976)
fair value through other comprehensive income equity instruments 12,103 11,752
Financial liabilities at fair value through profit or loss 3,940,624 (613,092)
Financial liabilities, at fair value (17,228,708) (24,502,316)
Trade Accounts Payable [Member]    
IfrsStatementLineItems [Line Items]    
Financial liabilities at amortised cost (12,592,428) (14,136,224)
fair value through other comprehensive income equity instruments
Financial liabilities at fair value through profit or loss
Financial liabilities, at fair value (12,592,428) (14,136,224)
Loans And Financing [Member]    
IfrsStatementLineItems [Line Items]    
Financial liabilities at amortised cost (15,074,206) (16,055,704)
fair value through other comprehensive income equity instruments
Financial liabilities at fair value through profit or loss (5,021,342) (7,461,296)
Financial liabilities, at fair value (20,095,548) (23,517,000)
Derivatives Not Designated [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost
fair value through other comprehensive income equity instruments
Financial assets at fair value through profit or loss 154 3,939
Financial assets, at fair value 154 3,939
Financial liabilities at amortised cost
fair value through other comprehensive income equity instruments
Financial liabilities at fair value through profit or loss (62,647) (6,251)
Financial liabilities, at fair value (62,647) (6,251)
Derivatives Designated As Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Financial liabilities at amortised cost
fair value through other comprehensive income equity instruments
Financial liabilities at fair value through profit or loss (74,112) (250,916)
Financial liabilities, at fair value (74,112) (250,916)
Cash And Bank Accounts [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost 1,607,257 1,865,077
fair value through other comprehensive income equity instruments
Financial assets at fair value through profit or loss
Financial assets, at fair value 1,607,257 1,865,077
Cash Equivalents 1 [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost
fair value through other comprehensive income equity instruments
Financial assets at fair value through profit or loss 7,657,407 6,265,852
Financial assets, at fair value 7,657,407 6,265,852
Marketable Securities [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost 291,402 379,145
fair value through other comprehensive income equity instruments 12,103 11,752
Financial assets at fair value through profit or loss 464,368 433,878
Financial assets, at fair value 767,873 824,775
Restricted Cash [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost 86,209 89,717
fair value through other comprehensive income equity instruments
Financial assets at fair value through profit or loss
Financial assets, at fair value 86,209 89,717
Trade receivables [member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost 4,434,070 3,918,570
fair value through other comprehensive income equity instruments
Financial assets at fair value through profit or loss 337,898 274,493
Financial assets, at fair value 4,771,968 4,193,063
Notes Receivables [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost 66,261  
fair value through other comprehensive income equity instruments  
Financial assets at fair value through profit or loss  
Financial assets, at fair value 66,261  
Derivatives Designated As Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost
fair value through other comprehensive income equity instruments
Financial assets at fair value through profit or loss 638,898 127,209
Financial assets, at fair value R$ 638,898 127,209
Other Receivables [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets at amortised cost   38,443
fair value through other comprehensive income equity instruments  
Financial assets at fair value through profit or loss  
Financial assets, at fair value   R$ 38,443