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CONSOLIDATED FINANCIAL STATEMENTS - Joint ventures (Details) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Bradley Steel Processors |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Canada | Canada | Canada
Equity Interests (as a percent) | 50.00% | 50.00% | 50.00%
MRM Guide Rail |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Canada | Canada | Canada
Equity Interests (as a percent) | 50.00% | 50.00% | 50.00%
Gerdau Corsa S.A.P.I. de C.V. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Mexico | Mexico | Mexico
Equity Interests (as a percent) | 75.00% | 75.00% | 75.00%
Gerdau Metaldom Corp. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Dominican Rep. | Dominican Rep. | Dominican Rep.
Equity Interests (as a percent) | 50.00% | 50.00% | 50.00%
Gerdau Summit Acos Fundidos e Forjados S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil | Brazil | Brazil
Equity Interests (as a percent) | 58.73% | 58.73% | 58.73%
Diaco S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Colombia | Colombia | Colombia
Equity Interests (as a percent) | 49.85% | 49.87% | 49.87%
Juntos Somos Mais Fidelizacao S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil | Brazil | Brazil
Equity Interests (as a percent) | 27.16% | 27.50% | 27.50%
Addiante S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil | Brazil |
Equity Interests (as a percent) | 50.00% | 50.00% |
Ubirata Tecnologia S.A |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil | Brazil |
Equity Interests (as a percent) | 50.00% | 50.00% |
Brasil ao Cubo S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil |  |
Equity Interests (as a percent) | 44.66% |  |

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- Definition The principal place of business of a joint venture. [Refer: Principal place of business; Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 16 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_16_b_ii&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 17 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_17_b_ii&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph 21 -Subparagraph a -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_21_a_iii&doctype=Standard -URIDate 2023-03-23 + Details
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