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SHAREHOLDERS' EQUITY (Details) - shares | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Reserve Quantities [Line Items] |  |
Number of common shares | 1,326,093,947 | 1,326,093,947
Percentage of total shares | 5.00% |
Outstanding Shares [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares | 1,326,093,947 | 1,326,093,947
Percentage of total shares | 100.00% | 100.00%
Percentage of voting capital | 100.00% | 100.00%
Vicunha Acos S A [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares | 543,617,803 | 679,522,254
Percentage of total shares | 40.99% | 51.24%
Percentage of voting capital | 40.99% | 51.24%
Rio Laco Participacoes S A [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares | 45,706,242 | 45,706,242
Percentage of total shares | 3.45% | 3.45%
Percentage of voting capital | 3.45% | 3.45%
C F L Ana Participacoes S A [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares | 135,904,451 | 0
Percentage of total shares | 10.25% | 0.00%
Percentage of voting capital | 10.25% | 0.00%
Nyse Adrs [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares | 273,702,845 | 254,520,040
Percentage of total shares | 20.64% | 19.19%
Percentage of voting capital | 20.64% | 19.19%
Other One [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares | 327,162,606 | 346,345,411
Percentage of total shares | 24.67% | 26.12%
Percentage of voting capital | 24.67% | 26.12%

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