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Note 13 - Investments in Non-consolidated Companies - Summary of Selected Financial Information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of unconsolidated structured entities [line items] |  |  |  |
Non-current assets | $ 9,081,650 | $ 9,468,258 |  |
Current assets | 8,468,596 | 4,981,173 |  |
Total assets | 17,550,246 | 14,449,431 | $ 13,716,189 |
Non-current liabilities | 727,386 | 784,084 |  |
Current liabilities | 2,788,423 | 1,559,645 |  |
Total liabilities | 3,515,809 | 2,343,729 |  |
Total equity | 14,034,437 | 12,105,702 | 11,446,473 | $ 12,186,372
Non-controlling interests | 128,728 | 145,124 |  |
Revenues | 11,762,526 | 6,521,207 | 5,146,734 |
Gross profit | 4,674,787 | 1,909,605 | 1,059,417 |
Net income for the year attributable to owners of the parent | 2,553,280 | 1,100,191 | (634,418) |
Total comprehensive income for the year, net of tax, attributable to owners of the parent | 2,476,373 | 1,016,434 | $ (643,435) |
Ternium S.A. [member] |  |  |  |
Disclosure of unconsolidated structured entities [line items] |  |  |  |
Non-current assets | 8,647,510 | 8,491,363 |  |
Current assets | 8,844,038 | 8,606,544 |  |
Total assets | 17,491,548 | 17,097,907 |  |
Non-current liabilities | 1,506,325 | 1,649,105 |  |
Current liabilities | 2,216,832 | 3,213,764 |  |
Total liabilities | 3,723,157 | 4,862,869 |  |
Total equity | 13,768,391 | 12,235,038 |  |
Non-controlling interests | 1,922,434 | 1,700,019 |  |
Revenues | 16,414,466 | 16,090,744 |  |
Gross profit | 3,927,184 | 6,195,674 |  |
Net income for the year attributable to owners of the parent | 1,767,516 | 3,825,068 |  |
Usiminas [member] |  |  |  |
Disclosure of unconsolidated structured entities [line items] |  |  |  |
Non-current assets | 3,764,453 | 3,491,103 |  |
Current assets | 3,901,844 | 3,583,814 |  |
Total assets | 7,666,297 | 7,074,917 |  |
Non-current liabilities | 1,671,249 | 1,575,321 |  |
Current liabilities | 1,033,524 | 1,134,663 |  |
Total liabilities | 2,704,773 | 2,709,984 |  |
Total equity | 4,961,524 | 4,364,933 |  |
Non-controlling interests | 523,741 | 467,551 |  |
Revenues | 6,296,964 | 6,269,569 |  |
Gross profit | 1,110,439 | 2,101,336 |  |
Net income for the year attributable to owners of the parent | $ 319,979 | $ 1,687,682 |  |

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