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Schedule of quantitative sensitivity analysis regarding relevant assumptions of defined benefit plan (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]    
Other R$ 552,585 R$ 776,555
Current 54,354 125,230
Non-current R$ 498,231 651,325
Discount Rate [Member]    
IfrsStatementLineItems [Line Items]    
Assumptions utilized 8.76%  
Average rate 9.76%  
Actuarial liabilities R$ 2,996,161  
Average rate 7.76%  
Actuarial liabilities R$ 3,759,792  
Wage Growth Rate [Member]    
IfrsStatementLineItems [Line Items]    
Assumptions utilized 4.34%  
Average rate 5.34%  
Actuarial liabilities R$ 3,409,740  
Average rate 3.34%  
Actuarial liabilities R$ 3,282,485  
Medical Plan [Member]    
IfrsStatementLineItems [Line Items]    
Other 195,345 185,802
F G T S Penalty [Member]    
IfrsStatementLineItems [Line Items]    
Other [1] 53,881 282,229
Award For Length Of Service [Member]    
IfrsStatementLineItems [Line Items]    
Other 98,474 108,908
Others [Member]    
IfrsStatementLineItems [Line Items]    
Other R$ 204,885 R$ 199,616
[1] FGTS – Government Severance Indemnity Fund for Employees