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Cash and cash equivalents (Details) - BRL (R$)
R$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Cash And Cash Equivalents        
Cash and banks R$ 27,042 R$ 31,187    
Cash equivalents 1,992,349 807,297    
Total R$ 2,019,391 R$ 838,484 R$ 836,450 R$ 1,867,485