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RELATED-PARTY TRANSACTIONS - Key Management compensation and other information from related parties (Details) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 BRL (R$) EquityInstruments shares | Dec. 31, 2022 BRL (R$) EquityInstruments | Dec. 31, 2021 BRL (R$) EquityInstruments | Dec. 31, 2020 BRL (R$) EquityInstruments | Jan. 10, 2023 BRL (R$)
RELATED PARTY TRANSACTIONS |  |  |  |  |
Cost of social charges, related to the management | R$ 17,077 | R$ 20,455 | R$ 23,266 |  |
Investments in associates and jointly-controlled entities | 3,858,449 | 3,896,518 | 3,340,775 | R$ 2,271,629 |
Brasil ao Cubo S.A. |  |  |  |  |
RELATED PARTY TRANSACTIONS |  |  |  |  |
Investments in associates and jointly-controlled entities |  |  |  |  | R$ 141,000
Key Management personnel (Board of Directors and executive officers) |  |  |  |  |
RELATED PARTY TRANSACTIONS |  |  |  |  |
Key management salaries, variable compensation and benefits | 36,964 | 42,164 | 61,747 |  |
Contributions to management's defined contribution pension plans | 1,986 | 2,040 | 1,932 | R$ 1,932 |
Key management long-term incentive plans | R$ 25,352 | R$ 19,548 | R$ 19,637 |  |
Key Management personnel (Board of Directors and executive officers) | Restricted and Performance Shares |  |  |  |  |
Restricted shares granted to Management |  |  |  |  |
Balance, beginning of year | EquityInstruments | 3,415,166 | 3,712,436 | 6,456,248 |  |
Granted | EquityInstruments | 2,705,702 | 840,496 | 709,990 |  |
Exercised | EquityInstruments | (938,953) | (1,135,503) | (3,453,802) |  |
Cancelled | EquityInstruments | (404,922) | (2,262) |  |  |
Share Bonus | shares | (168,859) |  |  |  |
Balance, end of year | EquityInstruments | 4,945,852 | 3,415,166 | 3,712,436 | 6,456,248 |
Fundacao Gerdau, Instituto Gerdau and Fundacao Ouro Branco |  |  |  |  |
RELATED PARTY TRANSACTIONS |  |  |  |  |
Contributions to defined contribution pension plans | R$ 41,763 | R$ 36,860 |  |  |

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- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 24 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_24_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph B16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_e&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of compensation to key management personnel in the form of other long-term employee benefits. [Refer: Other long-term employee benefits; Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2023-01-01 -Paragraph 17 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2023-en-r&anchor=para_17_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 53 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_53&doctype=Standard -URIDate 2023-03-23 + Details
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