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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Risk classification of trade accounts receivable (Details) - Trade accounts receivable - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Expected credit losses	R$ 34,763	R$ 41,889	R$ 41,996
Credit risk
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Credit risk exposure	6,566,228	2,957,095
Expected credit losses	34,763	41,889
Credit risk | Low Risk | Current and overdue to 30 days
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Credit risk exposure	6,491,726	2,813,038
Credit risk | Average Risk | Overdue between 30 and 90 days
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Credit risk exposure	19,147	54,115
Credit risk | High Risk | Overdue more than 90 days
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Credit risk exposure	R$ 55,355	R$ 89,942

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 2023-01-01
-Name IFRS
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-IssueDate 2021-01-01
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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.

+ References

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph IG24
-Subparagraph c
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