v3.26.1
Note 14 - Investments in non-consolidated companies - Summary of Selected Financial Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of unconsolidated structured entities [line items]        
Non-current assets $ 10,999,431 $ 11,213,945    
Current assets 9,072,882 9,236,180    
Total assets 20,072,313 20,450,125    
Non-current liabilities 896,851 999,633    
Current liabilities 2,346,394 2,636,657    
Total liabilities 3,243,245 3,636,290    
Total equity 16,829,068 16,813,835 $ 17,030,437 $ 14,034,437
Non-controlling interests 229,877 220,578    
Revenues 11,981,157 12,523,934 14,868,860  
Gross profit 4,120,413 4,388,445 6,199,945  
Net income / (loss) for the year attributable to shareholders' equity 1,932,813 2,036,445 3,918,065  
Total comprehensive (loss) / income attributable to shareholders' equity 2,081,964 2,105,829 $ 3,873,213  
Ternium S.A. [member]        
Disclosure of unconsolidated structured entities [line items]        
Non-current assets 13,818,723 12,050,457    
Current assets 9,796,368 11,078,090    
Total assets 23,615,091 23,128,547    
Non-current liabilities 3,533,136 3,157,819    
Current liabilities 3,934,209 3,839,159    
Total liabilities 7,467,345 6,996,978    
Total equity 16,147,746 16,131,569    
Non-controlling interests 4,203,446 4,163,383    
Revenues 15,609,094 17,649,060    
Gross profit 2,353,104 2,888,836    
Net income / (loss) for the year attributable to shareholders' equity 425,232 (53,672)    
Other comprehensive income attributable to shareholders' equity 80,913 211,817    
Total comprehensive (loss) / income attributable to shareholders' equity 506,145 158,145    
Usiminas [member]        
Disclosure of unconsolidated structured entities [line items]        
Non-current assets 3,431,865 3,623,996    
Current assets 3,053,444 3,234,742    
Total assets 6,485,309 6,858,738    
Non-current liabilities 1,436,623 1,357,347    
Current liabilities 741,224 772,412    
Total liabilities 2,177,847 2,129,758    
Total equity 4,307,462 4,728,980    
Non-controlling interests 524,771 452,481    
Revenues 4,696,469 4,800,787    
Gross profit 390,533 308,043    
Net income / (loss) for the year attributable to shareholders' equity (550,447) (27,084)    
Other comprehensive income attributable to shareholders' equity 1,605 31,564    
Total comprehensive (loss) / income attributable to shareholders' equity $ (548,842) $ 4,480