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SEGMENT INFORMATION (Revenue by Product) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of products and services [line items] |  |  |
Net sales | $ 17,610,092 | $ 16,414,466 | $ 16,090,744
Slabs |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 177,240 | 640,231 | 1,304,437
Hot rolled |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 7,913,232 | 6,991,466 | 6,356,576
Cold rolled |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 2,379,499 | 1,951,702 | 1,990,143
Coated |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 5,708,328 | 5,704,765 | 5,303,394
Roll-formed and tubular |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 789,255 | 660,830 | 659,609
Billets, round bars and others |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 45,351 | 142,511 | 167,138
Other products |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | $ 597,187 | $ 322,961 | $ 309,447

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