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CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Commitments: a-l) (Details) MMBTU in Thousands, m³ in Millions |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2019 MMBTU | May 09, 2018 MMBTU | Apr. 24, 2017 MW | Jun. 30, 2008 USD ($) m³ | Jun. 30, 2019 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2018 USD ($) | Dec. 13, 2019 payment | Jun. 30, 2018 USD ($)
Ternium Mexico Syndicated Loan Due June 2023 |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Original principal amount |  |  |  |  |  |  |  |  | $ 1,000,000,000
Number of loan payments | payment |  |  |  |  |  |  |  | 8 |
Borrowings, net senior leverage ratio |  |  |  |  |  | 350.00% |  |  |
Line of credit facility, disbursed |  |  |  |  | $ 600,000,000 |  | $ 400,000,000 |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  | $ 175,500,000 |  |  |
Wind Generation Farm |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  | $ 62,000,000 |  |  |
ValeS.A.MineracaoCorumbaenseReunidaS.A. | Scenario one |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of penalty |  |  |  |  |  | 7.00% |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  | 80.00% |  |  |
ValeS.A.MineracaoCorumbaenseReunidaS.A. | Scenario one | Bottom of range |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of total volume actually operated |  |  |  |  |  | 70.00% |  |  |
ValeS.A.MineracaoCorumbaenseReunidaS.A. | Scenario one | Top of range |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of total volume actually operated |  |  |  |  |  | 75.00% |  |  |
ValeS.A.MineracaoCorumbaenseReunidaS.A. | Scenario two |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of penalty |  |  |  |  |  | 15.00% |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  | 80.00% |  |  |
ValeS.A.MineracaoCorumbaenseReunidaS.A. | Scenario two | Bottom of range |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, percentage of total volume actually operated |  |  |  |  |  | 70.00% |  |  |
Air Liquide Argentina S.A. | Public utilities inventory, fuel |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  | $ 167,100,000 |  |  |
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 |  |  |  |  |  | 59,900,000 |  |  |
Gas Industrial de Monterrey, S.A. de C.V. |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  | 19,800,000 |  |  |
Guarantor obligations, amount |  |  |  |  |  | 28,800,000 |  |  |
Long-term purchase commitment, obligations outstanding |  |  |  |  |  | 6,500,000 |  |  |
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 |  |  |
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 |  |  |
Kinder Morgan Gas |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, obligations outstanding |  |  |  |  |  | 179,000,000 |  |  |
Kinder Morgan Gas | Ternium S.A. |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Guarantor obligations, outstanding |  |  |  |  |  | $ 85,900,000 |  |  |
Guarantor obligations, percentage |  |  |  |  |  | 48.00% |  |  |
Iron Ore, Pellets and Iron Ore Fines | ValeS.A.MineracaoCorumbaenseReunidaS.A. |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  | $ 304,900,000 |  |  |
Long-term purchase commitment, minimum percentage of volume required |  |  |  |  |  | 80.00% |  |  |
Natural Gas | Tecpetrol |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  |  |  | $ 48,600,000 |  |  |
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 |  |  |  |  |  | $ 5,300,000 |  |  |
Industrial Gas | Praxair Mexico |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |
Long-term purchase commitment, amount |  |  |  | $ 421,000,000 |  |  |  |  |
Long-term purchase commitment , minimum annual consumption, volume | m³ |  |  |  | 96.0 |  |  |  |  |

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