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5 Risk management (Details 1)	Dec. 31, 2020 R$ / $ R$ / ¥	Dec. 31, 2019 R$ / $ R$ / ¥
Yen
Summary of risk management [Line Items]
Exchange rate | R$ / ¥	0.05043	0.03715
Exchange rate variation	28.90%
USD
Summary of risk management [Line Items]
Exchange rate | R$ / $	5.1967	4.0307
Exchange rate variation	35.70%

X

- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2020-01-01

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- Definition

The amount represents information related to closing foreign exchange rate variation.

+ References

No definition available.

+ Details

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- Definition

Its represents information related to summary of risk management line items.

+ References

No definition available.

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