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EMPLOYEE BENEFITS - Weighted Principal Assumptions (Details) R$ in Millions | Dec. 31, 2022 BRL (R$) | Dec. 31, 2021 BRL (R$) | Dec. 31, 2020 BRL (R$)
--- | --- | --- | ---
Actuarial assumption of medical cost trend rates [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Increase in assumption | R$ (94.3) | R$ (114.7) | R$ (139.4)
Decrease in assumption | 81.8 | 98.6 | 118.6
Actuarial assumption of discount rates [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Increase in assumption | 307.9 | 442.0 | 461.0
Decrease in assumption | (328.0) | (470.3) | (492.6)
Actuarial assumption of expected rates of salary increases [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Increase in assumption | (17.6) | (19.8) | (24.3)
Decrease in assumption | 16.5 | 18.6 | 23.3
Actuarial assumption of life expectancy after retirement [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Increase in assumption | (221.5) | (287.6) | (295.6)
Decrease in assumption | R$ 213.5 | R$ 279.5 | R$ 287.1
Change in assumption, year | 1 |  |

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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_145_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_145_a&doctype=Standard -URIDate 2022-03-24 + Details
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