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18 RELATED-PARTY BALANCES AND TRANSACTIONS (Details Narrative) - BRL (R$) R$ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2020 | Jun. 30, 2019 | Apr. 26, 2019 | Dec. 31, 2018
Vicunha Acos S.A [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Dividend |  |  | R$ 203,179 |  |
Vicunha Acos S.A [Member] | Non-adjusting Events After Reporting Period [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Dividend |  | R$ 1,394 |  |  |
Vicunha Acos S.A [Member] | Bottom of Range [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Dividend | R$ 204,574 |  |  | R$ 442,308 |
Vicunha Siderurgia S.A. [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 49.24% |  |  |  |
Rio Iaco Participacoes S.A [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 4.22% |  |  |  |
Dividend |  |  | R$ 17,400 |  |
Rio Iaco Participacoes S.A [Member] | Non-adjusting Events After Reporting Period [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Dividend |  | R$ 119 |  |  |
Rio Iaco Participacoes S.A [Member] | Bottom of Range [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Dividend | R$ 17,519 |  |  | R$ 37,879 |
Vicunha Steel S.A. [Member] | Vicunha Acos S.A [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 67.93% |  |  |  |
CFL Participacoes S.A [Member] | Vicunha Acos S.A [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 12.82% |  |  |  |
CFL Participacoes S.A [Member] | Rio Purus Participacoes S.A. [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 19.25% |  |  |  |
Vicunha Steel S.A. [Member] | Vicunha Acos S.A [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 40.00% |  |  |  |
Vicunha Steel S.A. [Member] | Rio Purus Participacoes S.A. [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Voting rights | 60.00% |  |  |  |
Transnordestina Logistica S.A [Member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Loan amount | R$ 844,426 |  |  |  | R$ 706,605
Transnordestina Logistica S.A [Member] | Bottom of Range [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Loan interest rate | 125.00% |  |  |  |
Transnordestina Logistica S.A [Member] | Top of Range [member] |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Loan interest rate | 130.00% |  |  |  |

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