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Bonds and Securities (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Bonds and securities R$ 431,056 R$ 361,058
Bonds and securities, current 93 16,121
Bonds and securities, noncurrent R$ 430,963 344,937
Quotas In Funds [Member]    
IfrsStatementLineItems [Line Items]    
Index [1]  CDI   
Bonds and securities [1] R$ 353,454 284,852
Bank Deposit Certificates [Member]    
IfrsStatementLineItems [Line Items]    
Index  96% to 101% of CDI   
Bonds and securities R$ 77,602 61,635
National Treasury Bills [Member]    
IfrsStatementLineItems [Line Items]    
Index  10.92% p.a.   
Bonds and securities R$ 14,571
[1] These are fixed income funds in the Parent Company and reserve accounts intended to comply with contracts with BNDES.