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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Expected credit losses | R$ 21,109 | R$ 34,763 | R$ 41,889
Credit risk |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Credit risk exposure | 9,628,121 | 6,566,228 |
Expected credit losses | 21,109 | 34,763 |
Credit risk | Low | Current and overdue to up 30 days |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Credit risk exposure | 9,430,244 | 6,491,726 |
Credit risk | Average | Overdue between 30 and 90 days |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Credit risk exposure | 129,900 | 19,147 |
Credit risk | High | Overdue more than 90 days |  |  |
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT |  |  |
Credit risk exposure | R$ 67,977 | R$ 55,355 |

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