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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, 2021	Dec. 31, 2020
Disclosure of external credit grades [line items]
Counterparty credit rating	R$ 4,463,473	R$ 8,672,160
AAA [member]
Disclosure of external credit grades [line items]
Counterparty credit rating	3,606,000	8,190,428
AA [member]
Disclosure of external credit grades [line items]
Counterparty credit rating	740,879	317,894
A [member]
Disclosure of external credit grades [line items]
Counterparty credit rating	R$ 116,594	R$ 163,838

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

No definition available.

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