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DERIVATIVE FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2013
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Interest rate swap contracts | Tenigal S. de R.L. de C.V. |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount |  | $ 100,000,000
Derivative, average fixed interest rate |  | 1.92%
Non-deliverable forward contract | Ternium Argentina S.A. |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | $ 0 |
Non-deliverable forward contract | Ternium Colombia S.A.S |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | 90,600,000 |
Non-deliverable forward contract | Ternium Mexico S.A. de C.V. |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | 120,000,000 |
Forward contract | Ternium Mexico S.A. de C.V. |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | 28,500,000 |
Forward contract | Ternium Investments S.à.r.l. |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | 0 |
Forward contract | Ternium del Atlantico S.A.S |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | 0 |
Swap contract | Ternium Mexico S.A. de C.V. |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | $ 5,800,000 |

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