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INTANGIBLE ASSETS - Intangible assets by segment (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Composition of other intangible assets by segment |  |  |  |
Other intangible assets | R$ 415,159 | R$ 509,760 | R$ 622,578 | R$ 673,262
Brazil |  |  |  |
Composition of other intangible assets by segment |  |  |  |
Other intangible assets | 161,586 | 175,290 | 220,303 |
Special Steel |  |  |  |
Composition of other intangible assets by segment |  |  |  |
Other intangible assets | 115,072 | 158,432 | 156,557 |
South America |  |  |  |
Composition of other intangible assets by segment |  |  |  |
Other intangible assets | 1,054 | 1,039 | 1,534 |
North America |  |  |  |
Composition of other intangible assets by segment |  |  |  |
Other intangible assets | 104,794 | 170,936 | R$ 244,184 |
Other |  |  |  |
Composition of other intangible assets by segment |  |  |  |
Other intangible assets | R$ 32,653 | R$ 4,063 |  |

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