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SEGMENT INFORMATION (Segment reporting information, by segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of operating segments [line items] |  |  |
Operating income | $ 2,699,519 | $ 5,271,136 | $ 1,079,473
Cost of sales | 12,487,282 | 9,895,070 | 7,099,923
Financial income (expense), net | (98,541) | 56,547 | 19,554
Equity in earnings of non-consolidated companies | 37,114 | 400,732 | 57,555
Income before income tax expense - IFRS | 2,666,500 | 5,764,330 | 1,159,359
Net sales | 16,414,466 | 16,090,744 | 8,735,435
Ternium |  |  |
Disclosure of operating segments [line items] |  |  |
Operating income | 2,571,165 | 4,415,791 | 1,149,249
Financial income (expense), net | (70,133) | 92,462 | 22,331
Equity in earnings of non-consolidated companies | 37,114 | 400,732 | 57,555
Income before income tax expense - IFRS | 2,666,500 | 5,764,330 | 1,159,359
Depreciation and amortization | (616,492) | (591,790) | (631,051)
Ternium | External Customers |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | 16,414,466 | 16,090,744 | 8,735,435
Ternium | Other Operating Segments Of The Same Entity |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | 0 | 0 | 0
Ternium | Inter-segment eliminations |  |  |
Disclosure of operating segments [line items] |  |  |
Operating income | 10,500 | 1,586 | 689
Depreciation and amortization | 0 | 0 | 0
Ternium | Inter-segment eliminations | External Customers |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | 0 | 0 | 0
Ternium | Inter-segment eliminations | Other Operating Segments Of The Same Entity |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | (410,636) | (478,559) | (334,619)
Ternium | Reconciling items |  |  |
Disclosure of operating segments [line items] |  |  |
Cost of sales | 128,354 | 855,345 | (69,776)
Ternium | Steel | Operating segments |  |  |
Disclosure of operating segments [line items] |  |  |
Operating income | 2,556,949 | 4,210,135 | 1,046,623
Depreciation and amortization | (523,818) | (528,144) | (580,807)
Ternium | Steel | Operating segments | External Customers |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | 16,414,334 | 16,043,033 | 8,679,513
Ternium | Steel | Operating segments | Other Operating Segments Of The Same Entity |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales |  |  |
Ternium | Mining | Operating segments |  |  |
Disclosure of operating segments [line items] |  |  |
Operating income | 3,716 | 204,070 | 101,937
Depreciation and amortization | (92,674) | (63,646) | (50,244)
Ternium | Mining | Operating segments | External Customers |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | 132 | 47,711 | 55,922
Ternium | Mining | Operating segments | Other Operating Segments Of The Same Entity |  |  |
Disclosure of operating segments [line items] |  |  |
Net sales | $ 410,636 | $ 478,559 | $ 334,619

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