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Cash and Cash Equivalents and Financial Investments - Cash and cash equivalents (Detail) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash and cash equivalents and financial investments details [abstract]
Cash and bank deposits In local currency	R$ 285,306	R$ 182,237
In foreign currency	119,775	102,755
Fixed-income securities	2,241,852	1,780,939
Fixed-income securities	14,561	49,448
Total cash and cash equivalents	R$ 2,661,494	R$ 2,115,379	R$ 3,938,951	R$ 5,002,004

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2019-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph B13
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B
-URIDate 2019-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 54
-Subparagraph i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_i&doctype=Standard
-URIDate 2019-03-27

+ Details

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X

- Definition

The amount of cash on hand and bank deposits in foreign currency.

+ References

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- Definition

The amount of cash on hand and bank deposits in local currency.

+ References

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- Definition

Cash and cash equivalents and financial investments details.

+ References

No definition available.

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- Definition

Investment that provides a return in the form of fixed periodic payments and the eventual return of principal at maturity.

+ References

No definition available.

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- Definition

Investment in local currency that provides a return in the form of fixed periodic payments and the eventual return of principal at maturity.

+ References

No definition available.

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