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SEGMENT INFORMATION (Revenue by product) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of products and services [line items] |  |  |
Net sales | $ 16,414,466 | $ 16,090,744 | $ 8,735,435
Slabs |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 640,231 | 1,304,437 | 1,047,311
Hot rolled |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 6,991,466 | 6,356,576 | 2,880,055
Cold rolled |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 1,951,702 | 1,990,143 | 1,101,963
Coated |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 5,704,765 | 5,303,394 | 3,015,132
Roll-formed and tubular |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 660,829 | 659,609 | 413,337
Billets, round bars and others |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | 142,512 | 167,138 | 3,632
Other products |  |  |
Disclosure of products and services [line items] |  |  |
Net sales | $ 322,961 | $ 309,447 | $ 274,005

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