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CONSOLIDATED FINANCIAL STATEMENTS - Joint ventures (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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% | 70.00%
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) | 49.87% | 49.87% | 49.87%
Juntos Somos Mais Fidelizacao S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil | Brazil | Brazil
Equity Interests (as a percent) | 27.50% | 27.50% | 27.50%
Addiante S.A. |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil |  |
Equity Interests (as a percent) | 50.00% |  |
Ubirata Tecnologia S.A |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |
Country | Brazil |  |
Equity Interests (as a percent) | 50.00% |  |

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