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Schedule of judicial deposits (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]    
Judicial deposits R$ 591,131 R$ 486,746
[custom:LongtermDeposits1-0] 75,712 67,641
Taxes Claims [Member]    
IfrsStatementLineItems [Line Items]    
Judicial deposits 405,739 346,659
Labor Claims [Member]    
IfrsStatementLineItems [Line Items]    
Judicial deposits 106,376 72,263
Civil [Member]    
IfrsStatementLineItems [Line Items]    
Judicial deposits 53,438 57,006
Easements [Member]    
IfrsStatementLineItems [Line Items]    
Judicial deposits 18,407 7,156
Customers [Member]    
IfrsStatementLineItems [Line Items]    
Judicial deposits 3,867 3,479
Others [Member]    
IfrsStatementLineItems [Line Items]    
Judicial deposits R$ 3,304 R$ 183