XML 144 R126.htm IDEA: XBRL DOCUMENT
v3.21.1

CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Commitments) (Details) MMBTU in Thousands, t in Millions, m³ in Millions |  |  |  |  |  |  |  |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) MW | Dec. 30, 2019 MMBTU | Mar. 05, 2019 USD ($) | May 25, 2018 | May 09, 2018 MMBTU | Apr. 24, 2017 MW | Jun. 30, 2008 USD ($) m³ | Mar. 31, 2008 electrical_plant | Dec. 20, 2000 electrical_plant | Mar. 31, 2017 | Jun. 30, 2019 USD ($) | Dec. 31, 2020 USD ($) t MW m³ | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2006 distributor MW | Feb. 13, 2019 USD ($) | Jun. 30, 2018 USD ($)
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of electrical plants terminated | electrical_plant |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |
Techgen S.A. de C.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of electric power, term |  |  |  |  |  | 25 years |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of electric power, electrical demand | MW |  |  |  |  |  | 699 |  |  |  |  |  |  |  |  |  |  |
Percentage of electricity needs supplied |  |  |  |  |  | 78.00% |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, outstanding | $ 62,500,000 |  |  |  |  |  |  |  |  |  |  | $ 62,500,000 |  |  |  |  |
Guarantor obligations, percentage of amount payable if counterparty terminates agreement |  |  |  | 78.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Iberdrola Energia Monterey, S.A. de C.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of electric power, term |  |  |  |  |  |  |  |  | 25 years |  |  |  |  |  |  |  |
Long-term contract for purchase of electric power, electrical demand | MW | 51.7 |  |  |  |  |  |  |  |  |  |  | 111.2 |  |  |  |  |
Percentage of electricity needs supplied |  |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |
Long-term contract for purchase of electric power, credit (per megawatt) |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |  |
Long-term contract for purchase of electric power, credit |  |  |  |  |  |  |  |  |  |  |  | 83,400,000 |  |  |  |  |
Long-term contract for purchase of electric power, discount |  |  |  |  |  |  |  |  |  |  |  | $ 15,000,000.0 |  |  |  |  |
Short-term contract for purchase of electric power, percentage discount on contract |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |
Ternium Mexico S.A. de C.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of electrical plants | electrical_plant |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |
Gas Industrial de Monterrey, S.A. de C.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount | $ 25,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, amount | 25,000,000.0 |  |  |  |  |  |  |  |  |  |  | $ 25,000,000.0 |  |  |  |  |
Long-term purchase commitment, obligations outstanding | 9,500,000 |  |  |  |  |  |  |  |  |  |  | 9,500,000 |  |  |  |  |
Praxair Mexico | Minimum Annual Oxygen Consumption |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment , minimum annual consumption, amount |  |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |  |  |
Kinder Morgan Texas Pipeline L.L.C., Kinder Morgan Tejas Pipeline L.L.C. and Kinder Morgan Border Pipeline L.L.C. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of natural gas transportation, period |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of natural gas transportation, capacity | MMBTU |  |  |  |  | 60 |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of natural gas transportation, amount | 3,700,000 |  |  |  |  |  |  |  |  |  |  | 3,700,000 |  |  |  |  |
Kinder Morgan Texas Pipeline L.L.C., Kinder Morgan Tejas Pipeline L.L.C. and Kinder Morgan Gas Natural de México S. de R.L. de C.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of natural gas transportation, period |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of natural gas transportation, capacity | MMBTU |  | 31 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of natural gas transportation, amount | 4,800,000 |  |  |  |  |  |  |  |  |  |  | 4,800,000 |  |  |  |  |
Kinder Morgan Gas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, obligations outstanding | 221,800,000 |  |  |  |  |  |  |  |  |  |  | $ 221,800,000 |  |  |  |  |
Ternium Brasil Ltda. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contract for purchase of electric power, term |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 years |  |
Long-term contract for purchase of electric power, electrical demand | MW |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200 |  |
Number of distributors | distributor |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24 |  |
GE Global Parts and Products GMBH, General Electric International Inc. and Alstom Energia Térmica e Indústria Ltda. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, period for maintenance services of turbines |  |  |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |
Companhia Distribuidora de Gás do Rio de Janeiro |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  |  |  |  |  |  |  | 85.00% |  |  |  |  |
LSI Logistica S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount | 11,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities inventory, fuel | Air Liquide Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | $ 18,700,000 |  |  |  |  |
Industrial Gas | Praxair Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount | 6,100,000 |  |  |  |  |  | $ 421,000,000 |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment , minimum annual consumption, volume | m³ |  |  |  |  |  |  | 96.0 |  |  |  |  |  |  |  |  |  |
Industrial Gas | Air Liquide Brasil Ltda., AirSteel Ltda., White Martins Gases Industriais Ltda., White Martins Steel Ltda. and ThyssenKrupp MinEnergy GmbH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount | 228,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hydrogen | Praxair Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount | 8,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Iron Ore, Pellets and Iron Ore Fines | Ternium Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  |  |  |  |  |  |  | 80.00% |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | $ 385,000,000.0 |  |  |  |  |
Iron Ore, Pellets and Iron Ore Fines | Vale S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, total purchased volume | t |  |  |  |  |  |  |  |  |  |  |  | 8.0 |  |  |  |  |
Turbine Maintenance | GE Global Parts and Products GMBH, General Electric International Inc. and Alstom Energia Térmica e Indústria Ltda. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | $ 171,300,000 |  |  |  |  |
Maintenance Services | Primetals Technologies Brazil Ltda. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | 57,300,000 |  |  |  |  |
Natural Gas | Tecpetrol |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | 8,100,000 |  |  |  |  |
Natural Gas | Transportadora de Gas del Norte S.A. and Energy Consulting Services S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | 28,500,000 |  |  |  |  |
Natural Gas | Companhia Distribuidora de Gás do Rio de Janeiro |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  |  |  |  |  |  |  | $ 25,800,000 |  |  |  |  |
Long-term purchase commitment, volume | m³ |  |  |  |  |  |  |  |  |  |  |  | 61.5 |  |  |  |  |
Techgen S.A. de C.V. | Syndicated Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 640,000,000 |
Borrowings outstanding | 44,600,000 |  |  |  |  |  |  |  |  |  |  | $ 44,600,000 |  |  |  |  |
Techgen S.A. de C.V. | Syndicated Loan | Financial Guarantee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, outstanding | 21,400,000 |  |  |  |  |  |  |  |  |  |  | 21,400,000 |  |  |  |  |
Ternium S.A. | Kinder Morgan Gas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, outstanding | 106,500,000 |  |  |  |  |  |  |  |  |  |  | $ 106,500,000 |  |  |  |  |
Guarantor obligations, percentage |  |  |  |  |  |  |  |  |  |  |  | 48.00% |  |  |  |  |
Techgen S.A. de C.V. | Syndicated Loan | Financial Guarantee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, percentage |  |  |  |  |  |  |  |  |  |  |  | 48.00% |  |  |  |  |
Scenario one | Ternium Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  |  |  |  |  |  |  | 80.00% |  |  |  |  |
Long-term purchase commitment, percentage of penalty |  |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |
Scenario one | Bottom of range | Ternium Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of total volume actually operated |  |  |  |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  |
Scenario one | Top of range | Ternium Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of total volume actually operated |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  |  |
Scenario two | Ternium Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  |  |  |  |  |  |  | 80.00% |  |  |  |  |
Long-term purchase commitment, percentage of penalty |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |
Scenario two | Bottom of range | Ternium Argentina S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of total volume actually operated |  |  |  |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  |
Ternium Mexico Syndicated Loan Due June 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original principal amount | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  | $ 1,000,000,000
Borrowings, net senior leverage ratio | 350.00% |  |  |  |  |  |  |  |  |  |  | 350.00% |  |  |  |  |
Line of credit facility, disbursed |  |  |  |  |  |  |  |  |  |  | $ 600,000,000 |  |  | $ 400,000,000 |  |  |
Borrowings outstanding | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |
Ternium Investments Syndicated Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original principal amount |  |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings outstanding | $ 400,000,000 |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |
Repayments of non-current borrowings |  |  |  |  |  |  |  |  |  |  |  |  | $ 725,000,000 | $ 375,000,000 |  |  |
Ternium Investments Syndicated Loan | Ternium Investments S.a.r.l. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfContingentLiabilitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow for repayments of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_RepaymentsOfNoncurrentBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Borrowings, net senior leverage ratio + References No definition available. + Details
Name: | tx_Borrowingsnetseniorleverageratio
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Borrowings outstanding + References No definition available. + Details
Name: | tx_Borrowingsoutstanding
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Term1 + References No definition available. + Details
Name: | tx_DebtInstrumentTerm1
Namespace Prefix: | tx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Guarantor Obligations, Amount + References No definition available. + Details
Name: | tx_GuarantorObligationsAmount
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Guarantor Obligations, Outstanding + References No definition available. + Details
Name: | tx_GuarantorObligationsOutstanding
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Guarantor Obligations, Percentage + References No definition available. + Details
Name: | tx_GuarantorObligationsPercentage
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Guarantor Obligations, Percentage of Amount Payable if Counterparty Terminates Agreement + References No definition available. + Details
Name: | tx_GuarantorObligationsPercentageofAmountPayableifCounterpartyTerminatesAgreement
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of Credit Facility, Disbursed + References No definition available. + Details
Name: | tx_LineOfCreditFacilityDisbursed
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long-term Contract for Purchase of Electric Power, Percentage Discount On Contract + References No definition available. + Details
Name: | tx_LongTermContractForPurchaseOfElectricPowerPercentageDiscountOnContract
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-Term Contract for Purchase of Natural Gas Transportation, Amount + References No definition available. + Details
Name: | tx_LongTermContractForPurchaseOfNaturalGasTransportationAmount
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-term Contract for Purchase of Natural Gas Transportation, Period + References No definition available. + Details
Name: | tx_LongTermContractForPurchaseOfNaturalGasTransportationPeriod
Namespace Prefix: | tx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment , Minimum Annual Consumption, Amount + References No definition available. + Details
Name: | tx_LongTermPurchaseCommitmentMinimumAnnualConsumptionAmount
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-term Purchase Commitment , Minimum Annual Consumption, Volume + References No definition available. + Details
Name: | tx_LongTermPurchaseCommitmentMinimumAnnualConsumptionVolume
Namespace Prefix: | tx_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Long-term Purchase Commitment, Obligations Outstanding + References No definition available. + Details
Name: | tx_LongTermPurchaseCommitmentObligationsOutstanding
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-term Contract for Purchase of Electric Power, Credit + References No definition available. + Details
Name: | tx_LongtermContractforPurchaseofElectricPowerCredit
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long-term Contract for Purchase of Electric Power, Credit, Per Megawatt + References No definition available. + Details
Name: | tx_LongtermContractforPurchaseofElectricPowerCreditPerMegawatt
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long-term Contract for Purchase of Electric Power, Discount + References No definition available. + Details
Name: | tx_LongtermContractforPurchaseofElectricPowerDiscount
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long-term Contract for Purchase of Electric Power, Electrical Demand + References No definition available. + Details
Name: | tx_LongtermContractforPurchaseofElectricPowerElectricalDemand
Namespace Prefix: | tx_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Contract for Purchase of Electric Power, Term + References No definition available. + Details
Name: | tx_LongtermContractforPurchaseofElectricPowerTerm
Namespace Prefix: | tx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Amount + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentAmount
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Minimum Percentage of Volume Required + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentMinimumPercentageofVolumeRequired
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Percentage of Penalty + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentPercentageofPenalty
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Percentage of Total Volume Actually Operated + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentPercentageofTotalVolumeActuallyOperated
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Period For Maintenance Services of Turbines + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentPeriodForMaintenanceServicesofTurbines
Namespace Prefix: | tx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Total Purchased Volume + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentTotalPurchasedVolume
Namespace Prefix: | tx_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Volume + References No definition available. + Details
Name: | tx_LongtermPurchaseCommitmentVolume
Namespace Prefix: | tx_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term contract for purchase of natural gas transportation, capacity + References No definition available. + Details
Name: | tx_Longtermcontractforpurchaseofnaturalgastransportationcapacity
Namespace Prefix: | tx_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Distributors + References No definition available. + Details
Name: | tx_NumberofDistributors
Namespace Prefix: | tx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of electrical plants + References No definition available. + Details
Name: | tx_Numberofelectricalplants
Namespace Prefix: | tx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of electrical plants terminated + References No definition available. + Details
Name: | tx_Numberofelectricalplantsterminated
Namespace Prefix: | tx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of electrical needs supplied + References No definition available. + Details
Name: | tx_Percentageofelectricityneedssupplied
Namespace Prefix: | tx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_TechgenS.A.deC.V.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_IberdrolaEnergiaMontereyS.A.deC.V.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_TerniumMexicoS.A.deC.V.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_GasIndustrialdeMonterreyS.A.deC.V.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_PraxairMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_GuarantorObligationsNatureAxis=tx_MinimumAnnualOxygenConsumptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_KinderMorganTexasPipelineLLCKinderMorganTejasPipelineLLCAndKinderMorganBorderPipelineLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_KinderMorganTexasPipelineLLCKinderMorganTejasPipelineLLCAndKinderMorganGasNaturalDeMxicoSDeRLDeCVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_KinderMorganGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_TerniumBrasilLtda.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_GEGlobalPartsandProductsGMBHGeneralElectricInternationalInc.andAlstomEnergiaTrmicaeIndstriaLtda.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_CompanhiaDistribuidoradeGsdoRiodeJaneiroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_LSILogisticaS.A.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_UnrecordedUnconditionalPurchaseObligationbyCategoryofItemPurchasedAxis=tx_PublicUtilitiesInventoryFuel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_AirLiquideArgentinaS.A.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_CategoryofItemPurchasedAxis=tx_IndustrialGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_AirLiquideBrasilLtda.AirSteelLtda.WhiteMartinsGasesIndustriaisLtda.WhiteMartinsSteelLtda.andThyssenKruppMinEnergyGmbHMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_CategoryofItemPurchasedAxis=tx_HydrogenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_CategoryofItemPurchasedAxis=tx_IronOrePelletsandIronOreFinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_TerniumArgentinaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_ValeS.A.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_CategoryofItemPurchasedAxis=tx_TurbineMaintenanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_CategoryofItemPurchasedAxis=tx_MaintenanceServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_PrimetalsTechnologiesBrazilLtda.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_CategoryofItemPurchasedAxis=tx_NaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_TecpetrolMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=tx_TransportadoraDeGasDelNorteSAAndEnergyConsultingServicesSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=tx_TechgenS.A.deC.V.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_DebtInstrument1Axis=tx_SyndicatedLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_GuarantorObligationsNatureAxis=tx_FinancialGuarantee1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=tx_TerniumS.A.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=tx_TechgenS.A.deC.V.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_Scenario1Axis=tx_NumberOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tx_Scenario1Axis=tx_NumberTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tx_TerniumMexicoSyndicatedLoanDueJune2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tx_TerniumInvestmentsSyndicatedLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tx_TerniumInvestmentsSarlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |