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Employees benefits (Details 4)
R$ in Thousands
Dec. 31, 2023
BRL (R$)
Discount Rate [Member]  
IfrsStatementLineItems [Line Items]  
Assumptions utilized 9.54%
Variation of (+1%), Average rate 10.54%
Variation of (+1%), Actuarial liabilities R$ 3,031,526
Variation of (-1%), Average rate 8.54%
Variation of (-1%), Actuarial liabilities R$ 3,729,735
Wage Growth Rate [Member]  
IfrsStatementLineItems [Line Items]  
Assumptions utilized 1.06%
Variation of (+1%), Average rate 2.06%
Variation of (+1%), Actuarial liabilities R$ 3,373,686
Variation of (-1%), Average rate 0.06%
Variation of (-1%), Actuarial liabilities R$ 3,322,461