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CONSOLIDATED FINANCIAL STATEMENTS - Acquisition of joint ventures and associate company (Details) - BRL (R$) R$ in Thousands |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 15, 2023 | Jan. 10, 2023 | Dec. 01, 2021 | Nov. 30, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Recycling to income of the cumulative translation adjustments |  |  |  |  |  | R$ (13,239) | R$ (193,334)
Write-off of goodwill |  |  |  |  |  |  | 549,898
Results in operations with subsidiary and joint ventures |  |  |  |  |  |  | (162,913)
North America Operation | Mexico |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Write-off of goodwill |  |  |  |  |  |  | 549,898
Results in operations with subsidiary and joint ventures |  |  |  |  |  |  | 162,913
Gerdau Next and NW Capital |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Total consideration paid |  |  |  |  | R$ 388,000 |  |
Gerdau Next |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Equity Interests (as a percent) | 33.33% |  |  |  |  |  |
NW Capital |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Equity Interests (as a percent) | 66.67% |  |  |  |  |  |
Sidertul | Mexico |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Gain due to the fair value adjustment of the interest held |  |  |  |  |  |  | 193,651
Recycling to income of the cumulative translation adjustments |  |  |  |  |  |  | R$ 193,334
Brasil ao Cubo S.A. |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Amount converted into equity interest from a convertible loan |  | R$ 141,000 |  |  |  |  |
Value of equity interest acquired |  | R$ 37,000 |  |  |  |  |
Percentage of equity interests acquired |  | 44.66% |  |  |  |  |
Equity Interests (as a percent) |  |  |  |  | 44.66% |  |
Gerdau Corsa |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Equity Interests (as a percent) |  |  |  |  | 75.00% | 75.00% | 75.00%
Gerdau Corsa | Mexico |  |  |  |  |  |  |
CONSOLIDATED FINANCIAL STATEMENTS |  |  |  |  |  |  |
Equity Interests (as a percent) |  |  | 75.00% | 70.00% |  |  |

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