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Financial Instruments and Risks Management - Credit Risk Internal Risk Rating (Details) - Trade accounts receivable - BRL (R$) R$ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financial Instruments and Risks
Expected credit losses	R$ 41,996	R$ 37,179	R$ 38,740
Credit risk
Financial Instruments and Risks
Credit risk exposure, internal rating	3,077,813	2,574,237
Expected credit losses	41,996	37,179
Credit risk | Low Risk | Current
Financial Instruments and Risks
Credit risk exposure, internal rating	2,775,364	2,447,184
Credit risk | Average Risk | From 31 to 90 days
Financial Instruments and Risks
Credit risk exposure, internal rating	168,836	66,587
Credit risk | High Risk | More than 90 days
Financial Instruments and Risks
Credit risk exposure, internal rating	R$ 133,613	R$ 60,466

X

- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
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-IssueDate 2019-01-01
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-URIDate 2019-03-27

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- Definition

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

+ References

No definition available.

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
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