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Provisions and contingent liabilities - Contingent liabilities (possible) by nature (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Disclosure of contingent liabilities [line items]    
Total Contingent liabilities (possible) R$ 5,285,187 R$ 4,013,392
Tax [member]    
Disclosure of contingent liabilities [line items]    
Total Contingent liabilities (possible) 4,176,046 3,148,224
Civil [member]    
Disclosure of contingent liabilities [line items]    
Total Contingent liabilities (possible) 815,203 624,653
Labor [member]    
Disclosure of contingent liabilities [line items]    
Total Contingent liabilities (possible) R$ 293,938 R$ 240,515