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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.

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