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Recoverable taxes - Schedule of estimated recovery of PIS and COFINS credits (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Disclosure of estimated recovery of ICMS credits [line items]    
Total recoverable PIS and COFINS R$ 4,690,277 R$ 4,203,639
PIS and COFINS - Federal VAT [member]    
Disclosure of estimated recovery of ICMS credits [line items]    
Total recoverable PIS and COFINS 3,172,417 R$ 2,761,262
PIS and COFINS - Federal VAT [member] | Up to 1 year    
Disclosure of estimated recovery of ICMS credits [line items]    
Total recoverable PIS and COFINS 1,434,055  
PIS and COFINS - Federal VAT [member] | 1 to 2 years    
Disclosure of estimated recovery of ICMS credits [line items]    
Total recoverable PIS and COFINS 746,577  
PIS and COFINS - Federal VAT [member] | 2 to 3 years    
Disclosure of estimated recovery of ICMS credits [line items]    
Total recoverable PIS and COFINS 421,674  
PIS and COFINS - Federal VAT [member] | From 3 to 5 Years    
Disclosure of estimated recovery of ICMS credits [line items]    
Total recoverable PIS and COFINS R$ 570,111