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EMPLOYEE BENEFITS - Defined benefit pension plan - Reconciliation of plan assets and liabilities (Details) - Defined benefit pension plan - BRL (R$) R$ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Reconciliations of assets and liabilities of the plans |  |  |  |
Net | R$ (498,732) | R$ (658,492) |  |
Defined benefit obligation | (498,732) | (658,492) |  |
Present value of the defined benefit obligations |  |  |  |
Reconciliations of assets and liabilities of the plans |  |  |  |
Net | (3,573,044) | (3,841,213) | R$ (5,409,065) | R$ (5,921,285)
Plan assets |  |  |  |
Reconciliations of assets and liabilities of the plans |  |  |  |
Net | 3,383,887 | 3,499,475 | R$ 4,647,361 | R$ 4,652,000
Asset ceiling restrictions on recognition of net funded assets |  |  |  |
Reconciliations of assets and liabilities of the plans |  |  |  |
Net | R$ (309,575) | R$ (316,754) |  |

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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_140_a&doctype=Standard -URIDate 2023-03-23 + Details
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