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BORROWINGS (Significant borrowings) (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2018
Disclosure of detailed information about borrowings [line items]      
Borrowings $ 1,031,865,000 $ 1,479,038,000  
Ternium Mexico Syndicated Loan Due June 2023      
Disclosure of detailed information about borrowings [line items]      
Original principal amount 1,000,000,000   $ 1,000,000,000
Borrowings 125,000,000    
Ternium Brazil Syndicated Loan Due August 2024      
Disclosure of detailed information about borrowings [line items]      
Original principal amount 500,000,000    
Borrowings $ 500,000,000