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Risks and Financial Instruments - Summary of credit risk of financial institution and government of cash, cash equivalents and financial investments (Detail) - BRL (R$) R$ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of external credit grades [line items] |  |  |
Counterparty credit rating |  | R$ 7,170,563 | R$ 6,584,962
AAA [member] |  |  |
Disclosure of external credit grades [line items] |  |  |
Counterparty credit rating |  | 6,714,493 | 5,720,996
AA [member] |  |  |
Disclosure of external credit grades [line items] |  |  |
Counterparty credit rating |  | 408,375 | 809,583
A [member] |  |  |
Disclosure of external credit grades [line items] |  |  |
Counterparty credit rating |  | 464 | 3,457
Others [member] |  |  |
Disclosure of external credit grades [line items] |  |  |
Counterparty credit rating | [1] | R$ 47,231 | R$ 50,926
[1] | Refers substantially to investments as minority interest, which are classified as long term investments.

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