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CONSOLIDATED FINANCIAL STATEMENTS - Subsidiaries (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Gerdau GTL Spain S.L. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Gerdau Internacional Empreendimentos Ltda. - Grupo Gerdau |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Gerdau Ameristeel Corporation and subsidiaries |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[2] | 100.00% | 100.00% | 100.00%
Gerdau Acominas S.A. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 99.86% | 99.86% | 99.83%
Gerdau Acos Longos S.A. and subsidiary |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[3] | 99.83% | 99.82% | 99.82%
Gerdau Steel Inc. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Gerdau Holdings Inc. and subsidiary |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[4] | 100.00% | 100.00% | 100.00%
Paraopeba - Fixed-income investment fund |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[5],[6] | 70.62% | 89.26% | 96.96%
Percent of participation in investment fund |  | 73.54% | 92.58% | 98.07%
Gerdau Hungria Holdings Limited Liability Company |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
GTL Equity Investments Corp. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Empresa Siderurgica del Peru S.A.A. - Siderperu |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 90.03% | 90.03% | 90.03%
Gerdau GTL Mxico, S.A. de C.V. and subsidiary |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[7] | 100.00% | 100.00% | 100.00%
Seiva S.A. Florestas e Industrias |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 97.73% | 97.73% | 97.73%
Gerdau Laisa S.A. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Sipar Gerdau Inversiones S.A. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 99.99% | 99.99% | 99.99%
Sipar Aceros S.A. and subsidiary |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[8] | 99.98% | 99.98% | 99.98%
Sizuca - Siderrgica Zuliana, C. A. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
GTL Trade Finance Inc. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Gerdau Trade Inc. |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1] | 100.00% | 100.00% | 100.00%
Gerdau Next S.A. and subsidiaries |  |  |  |
Significant consolidated subsidiaries |  |  |  |
Equity Interests (as a percent) | [1],[9] | 100.00% |  |
[1] | The voting capital is substantially equal to the total capital. The interests reported represent the ownership percentage held directly and indirectly in the subsidiary.
[2] | Subsidiaries: Gerdau Ameristeel US Inc., Chaparral Steel Company.
[3] | Subsidiaries: Gerdau Açominas Overseas Ltd. and Siderúrgica Latino-Americana S.A.
[4] | Subsidiary: Gerdau MacSteel Inc.
[5] | Fixed-income investment fund managed by Bank JP Morgan S.A.
[6] | The percentage of participation including interest of the parent company Metalúrgica Gerdau S.A. in the investment fund is 73.54% in 2021, 92.58% in 2020 and 98.07% in 2019
[7] | Subsidiary: GTL Servicios Administrativos México, S.A. de C.V.
[8] | Subsidiary: Siderco S.A.
[9] | Subsidiaries: G2L Logística Ltda, G2base Fundações e Contenções Ltda and Gerdau Grafeno Ltda.

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