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SUBSEQUENT EVENTS (Details) shares in Millions, T in Millions, $ in Millions |  |  |  | 59 Months Ended
--- | --- | --- | --- | ---
Mar. 30, 2025 R$ / shares shares | Mar. 30, 2023 USD ($) R$ / shares shares | Feb. 14, 2023 USD ($) T | Dec. 31, 2027 USD ($)
New Asset Production |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Expected capital investment | $ |  |  | $ 2,200.0 |
Capacity of steel (in tons) | T |  |  | 2.6 |
Capacity of iron (in tons) | T |  |  | 2.1 |
Cumulative payments for development project expenditure | $ |  |  |  | $ 2,900.0
Period of capital expenditures recognition |  |  | 4 years |
Major ordinary share transactions | Usiminas |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Business acquisition, share price | R$ / shares | R$ 10 |  |  |
Percent of board approval |  | 0.55 |  |
Share price trading day window average | 40 days |  |  |
Major ordinary share transactions | Usiminas | Ternium S.A. |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Cash transferred | $ |  | $ 111.0 |  |
Proportion of voting rights held in subsidiary |  | 51.50% |  |
Percentage of share capital issued and outstanding |  | 0.251 |  |
Major ordinary share transactions | Usiminas | T/T Group |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Proportion of voting rights held in subsidiary |  | 61.30% |  |
Major ordinary share transactions | Usiminas | NSC Group |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Proportion of voting rights held in subsidiary |  | 31.70% |  |
Major ordinary share transactions | Usiminas | Previdencia Usiminas |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Proportion of voting rights held in subsidiary |  | 7.10% |  |
Major ordinary share transactions | Ordinary shares | Usiminas |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Number of shares outstanding (shares) | shares | 153.1 |  |  |
Business acquisition, share price | R$ / shares |  | $ 10 |  |
Major ordinary share transactions | Ordinary shares | Usiminas | Usiminas Control Group |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Number of shares outstanding (shares) | shares |  | 68.7 |  |
Major ordinary share transactions | Ordinary shares | Usiminas | Ternium S.A. |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Number of shares outstanding (shares) | shares |  | 57.7 |  |

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