v3.26.1
SEGMENT INFORMATION (Segment Reporting Information, by Segment) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 03, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of operating segments [line items]        
Operating income   $ 705,422 $ 1,263,311 $ 2,198,014
Differences in Cost of sales   13,255,990 14,760,224 14,050,737
Differences in Other operating income (expense), net   (46,216) 25,234 110,337
Financial income (expense), net   (48,564) (295,859) (6,179)
Equity in earnings of non-consolidated companies   85,641 69,108 105,305
Income before income tax expense - IFRS   648,239 728,005 1,320,782
Net sales   15,609,094 17,649,060 17,610,092
Usiminas        
Disclosure of operating segments [line items]        
Provision for ongoing litigation related to the acquisition of a participation in Usiminas   (117,400) (410,200) 0
Net sales   4,698,000 4,803,000  
Usiminas        
Disclosure of operating segments [line items]        
Effect related to the increase of the participation in Usiminas $ (171,045) 0 0 (171,045)
Effect related to the increase of the participation in Usiminas   0 0 (934,946)
Ternium        
Disclosure of operating segments [line items]        
Operating income   817,418 1,399,920 2,404,174
Financial income (expense), net   (25,424) (194,214) 123,454
Equity in earnings of non-consolidated companies   85,641 69,108 105,305
Income before income tax expense - IFRS   648,239 728,005 1,320,782
Depreciation and amortization   (788,308) (743,277) (657,692)
Ternium | Usiminas        
Disclosure of operating segments [line items]        
Effect related to the increase of the participation in Usiminas       (171,045)
Ternium | External Customers        
Disclosure of operating segments [line items]        
Net sales   15,609,094 17,649,060 17,610,092
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   (9,761) 5,844 (2,463)
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   (570,060) (629,940) (546,038)
Ternium | Reconciling items        
Disclosure of operating segments [line items]        
Differences in Cost of sales   (111,996) (190,243) (206,160)
Differences in Other operating income (expense), net     53,634  
Ternium | Steel | Operating segments        
Disclosure of operating segments [line items]        
Operating income   968,131 1,559,938 2,390,546
Depreciation and amortization   (582,072) (551,621) (542,295)
Ternium | Steel | Operating segments | External Customers        
Disclosure of operating segments [line items]        
Net sales   15,041,199 17,220,220 17,280,993
Ternium | Steel | Operating segments | Other Operating Segments Of The Same Entity        
Disclosure of operating segments [line items]        
Net sales   0 0 0
Ternium | Mining | Operating segments        
Disclosure of operating segments [line items]        
Operating income   (140,952) (165,862) 16,091
Depreciation and amortization   (206,236) (191,656) (115,397)
Ternium | Mining | Operating segments | External Customers        
Disclosure of operating segments [line items]        
Net sales   567,895 428,840 329,099
Ternium | Mining | Operating segments | Other Operating Segments Of The Same Entity        
Disclosure of operating segments [line items]        
Net sales   $ 570,060 $ 629,940 $ 546,038