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TAX, CIVIL AND LABOR CLAIMS AND CONTINGENT ASSETS - Changes in Provisions (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Changes in the tax, labor and civil provisions : |  |  |
Balance at the beginning of the year | R$ 809,299 |  |
Balance at the end of the year | 1,172,511 | R$ 809,299 |
Legal proceedings provision |  |  |
Changes in the tax, labor and civil provisions : |  |  |
Balance at the beginning of the year | 809,299 | 770,305 | R$ 827,883
Additions | 559,513 | 249,868 | 177,684
Monetary correction | 104,473 | 70,788 | 85,626
Reversal of contingent liabilities, net | 929,711 |  |
Reversal of monetary update of contingent liabilities | (369,819) |  |
Reversal of accrued amounts | (304,678) | (282,239) | (319,719)
Foreign exchange effect on provisions in foreign currency | 3,904 | 577 | (1,169)
Balance at the end of the year | R$ 1,172,511 | R$ 809,299 | R$ 770,305

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