TERNIUM S.A.. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 0001000 - Document - DOCUMENT AND ENTITY INFORMATION Network

*

*

 http://www.ternium.com/role/DocumentAndEntityInformation
2 Implied Table Table

*

*

 implied:Table
3 Document Information [Abstract] Abstract tx:DocumentInformationAbstract
4 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
5 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
6 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
7 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
8 Document Type Concept (Submission Type) For Period dei:DocumentType
9 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
10 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
11 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
12 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
13 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
14 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
15 Entity Voluntary Filers Concept (Yes/No) For Period dei:EntityVoluntaryFilers
16 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
17 1001000 - Statement - Consolidated Income Statements Network

*

*

 http://www.ternium.com/role/ConsolidatedIncomeStatements
18 Implied Table Table

*

*

 implied:Table
19 Profit or loss [abstract] Abstract ifrs-full:IncomeStatementAbstract
20 Net sales Concept (Monetary) For Period Credit ifrs-full:Revenue
21 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
22 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
23 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
24 Other operating income (expenses), net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
25 Profit (loss) from operating activities Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
26 Finance expense Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
27 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
28 Other financial income (expenses), net Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
29 Equity in earnings (losses) of non-consolidated companies Concept (Monetary) For Period Credit tx:Shareofprofitlossofassociatesandjointventuresaccountedforusingequitymethodincludingimpairment
30 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
31 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
32 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
33 Attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
34 Owners of the parent Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
35 Non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
36 Weighted average number of shares outstanding (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
37 Basic and diluted (losses) earnings per share for profit attributable to the owners of the parent (expressed in $ per share) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
38 1002000 - Statement - Consolidated Statements of Comprehensive Income Network

*

*

 http://www.ternium.com/role/ConsolidatedStatementsOfComprehensiveIncome
39 Implied Table Table

*

*

 implied:Table
40 Statement of comprehensive income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
41 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
42 Items that may be reclassified subsequently to profit or loss: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
43 Currency translation adjustment Concept (Monetary) For Period Credit tx:Othercomprehensiveincomeexchangedifferencesontranslation
44 Currency translation adjustment from participation in non-consolidated companies Concept (Monetary) For Period Credit tx:Othercomprehensiveincomeexchangedifferencesontranslationofassociatesandjointventuresfromparticipationinnonconsolidatedcompaniesaccountedforusingequitymethod
45 Changes in the fair value of financial instruments at fair value through other comprehensive income Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax
46 Income tax related to financial instruments at fair value Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
47 Changes in the fair value of derivatives classified as cash flow hedges Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
48 Income tax relating to cash flow hedges Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
49 Other comprehensive income items Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
50 Other comprehensive income items from participation in non-consolidated companies Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
51 Items that will not be reclassified subsequently to profit or loss: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
52 Remeasurement of post employment benefit obligations Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
53 Income tax relating to remeasurement of post employment benefit obligations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
54 Remeasurement of post employment benefit obligations from participation in non-consolidated companies Concept (Monetary) For Period Credit tx:Othercomprehensiveincomenetoftaxgainslossesonremeasurementsofdefinedbenefitplansofassociatesandjointventuresaccountedforusingequitymethod
55 Other comprehensive loss for the year, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
56 Total comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
57 Attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
58 Owners of the parent Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
59 Non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
60 1003000 - Statement - Consolidated Statements of Financial Position Network

*

*

 http://www.ternium.com/role/ConsolidatedStatementsOfFinancialPosition
61 Implied Table Table

*

*

 implied:Table
62 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
63 Assets Abstract ifrs-full:AssetsAbstract
64 Non-current assets Abstract ifrs-full:NoncurrentAssetsAbstract
65 Property, plant and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
66 Intangible assets, net Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
67 Investments in non-consolidated companies Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
68 Other investments Concept (Monetary) As Of Debit ifrs-full:NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
69 Derivative financial instruments Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
70 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
71 Receivables, net Concept (Monetary) As Of Debit tx:Noncurrentreceivablesotherthantradereceivablesnet
72 Trade receivables, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
73 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
74 Current assets Abstract ifrs-full:CurrentAssetsAbstract
75 Receivables, net Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
76 Derivative financial instruments Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
77 Inventories, net Concept (Monetary) As Of Debit ifrs-full:Inventories
78 Trade receivables, net Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
79 Other investments Concept (Monetary) As Of Debit ifrs-full:CurrentInvestments
80 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
81 Current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
82 Non-current assets classified as held for sale Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
83 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
84 Total Assets Concept (Monetary) As Of Debit ifrs-full:Assets
85 EQUITY Abstract ifrs-full:EquityAbstract
86 Capital and reserves attributable to the owners of the parent Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
87 Non-controlling interest Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
88 Total Equity Concept (Monetary) As Of Credit ifrs-full:Equity
89 LIABILITIES Abstract ifrs-full:LiabilitiesAbstract
90 Non-current liabilities Abstract ifrs-full:NoncurrentLiabilitiesAbstract
91 Provisions Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
92 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
93 Other liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
94 Trade payables Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayables
95 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
96 Borrowings Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
97 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
98 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
99 Current income tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
100 Other liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
101 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
102 Derivative financial instruments Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
103 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
104 Borrowings Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
105 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
106 Total Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
107 Total Equity and Liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
108 1004000 - Statement - Consolidated Statements of Changes in Equity Network

*

*

 http://www.ternium.com/role/ConsolidatedStatementsOfChangesInEquity
109 Statement of changes in equity [table] Table

*

*

 ifrs-full:StatementOfChangesInEquityTable
110 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
111 New IFRSs [member] Member ifrs-full:NewIFRSsMember
112 IFRS 9 Member tx:IFRS9Member
113 IAS 29 Member tx:IAS29Member
114 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
115 Equity [member] Member ifrs-full:EquityMember
116 Capital stock Member ifrs-full:IssuedCapitalMember
117 Treasury shares Member ifrs-full:TreasurySharesMember
118 Initial public offering expenses Member tx:InitialpublicofferingexpensesMember
119 Reserves Member ifrs-full:OtherReservesMember
120 Capital stock issue discount Member tx:IssuedcapitaldiscountMember
121 Currency translation adjustment Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
122 Retained earnings Member ifrs-full:RetainedEarningsMember
123 Total Member ifrs-full:EquityAttributableToOwnersOfParentMember
124 Non-controlling interest Member ifrs-full:NoncontrollingInterestsMember
125 Acquisition reserve Member ifrs-full:TransactionsRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombinationMember
126 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
127 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
128 Impact of adopting new accounting standard Concept (Monetary) As Of Credit tx:CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption1
129 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
130 Other comprehensive income (loss) for the year Abstract ifrs-full:OtherComprehensiveIncomeAbstract
131 Currency translation adjustment Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
132 Remeasurement of post employment benefit obligations Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
133 Cash flow hedges and others, net of tax Concept (Monetary) For Period Credit tx:Gainslossesoncashflowhedgesandothersnetoftax
134 Others Concept (Monetary) For Period Credit ifrs-full:OtherIndividuallyImmaterialComponentsOfOtherComprehensiveIncomeNetOfTax
135 Comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
136 Dividends paid in cash Concept (Monetary) For Period Debit ifrs-full:DividendsPaidOrdinaryShares
137 Dividends paid in cash to non-controlling interest Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterests
138 Inflation effect on dividends paid to non-controlling interest (note 4 (cc)) Concept (Monetary) For Period Debit tx:Inflationeffectondividendspaidtononcontrollinginterest
139 Ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
140 1005000 - Statement - Consolidated Statements of Cash Flows Network

*

*

 http://www.ternium.com/role/ConsolidatedStatementsOfCashFlows
141 Implied Table Table

*

*

 implied:Table
142 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
143 Cash flows from operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
144 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
145 Adjustments for: Abstract tx:AdjustmentsToReconcileProfitLossNonCashAbstractAbstract
146 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
147 Income tax accruals less payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncomeTaxExpense
148 Equity in earnings of non-consolidated companies Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod
149 Interest accruals less payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForInterestExpense
150 Changes in provisions Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForProvisions
151 Changes in working capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
152 Net foreign exchange results and others Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
153 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
154 Cash flows from investing activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
155 Capital expenditures Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
156 Loans to non-consolidated companies Concept (Monetary) For Period Credit ifrs-full:CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities
157 Decrease in other investments Concept (Monetary) For Period Credit tx:Increasedecreaseinotherinvestments
158 Proceeds from the sale of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
159 Dividends received from non-consolidated companies Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedFromAssociatesClassifiedAsInvestingActivities
160 Acquisition of business, Purchase consideration Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
161 Acquisition of business, Cash acquired Concept (Monetary) For Period Debit ifrs-full:CashAndCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
162 Investment in non-consolidated companies Concept (Monetary) For Period Credit ifrs-full:PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
163 Net cash used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
164 Cash flows from financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
165 Dividends paid in cash to company’s shareholders Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
166 Dividends paid in cash to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities
167 Finance Lease payments Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
168 Proceeds from borrowings Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
169 Repayments of borrowings Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
170 Net cash (used in) provided by financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
171 Increase (Decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
172 Movement in cash and cash equivalents Abstract ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalentsAbstract
173 Beginning of period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
174 Effect of exchange rate changes Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
175 Increase (Decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
176 End of period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
177 Non- Cash transactions: Abstract tx:NoncashInvestingandFinancingItemsAbstract
178 Acquisition of PP&E under lease contract agreements Concept (Monetary) For Period Credit tx:AcquisitionofPropertyPlantandEquipmentUnderLeaseContractAgreement
179 Non-cash items impacting working capital Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
180 Restricted cash Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
181 Other deposits with maturity of more than three months Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents
182 2101100 - Disclosure - GENERAL INFORMATION Network

*

*

 http://www.ternium.com/role/GeneralInformation
183 Implied Table Table

*

*

 implied:Table
184 Disclosure of general information about financial statements [Abstract] Abstract tx:DisclosureofgeneralinformationaboutfinancialstatementsAbstract
185 GENERAL INFORMATION Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
186 2104100 - Disclosure - BASIS OF PRESENTATION Network

*

*

 http://www.ternium.com/role/BasisOfPresentation
187 Implied Table Table

*

*

 implied:Table
188 Disclosure of notes and other explanatory information [Abstract] Abstract tx:DisclosureofnotesandotherexplanatoryinformationAbstract
189 BASIS OF PRESENTATION Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNotesAndOtherExplanatoryInformationExplanatory
190 2107100 - Disclosure - ACQUISITION OF BUSINESS Network

*

*

 http://www.ternium.com/role/AcquisitionOfBusiness
191 Implied Table Table

*

*

 implied:Table
192 Disclosure of detailed information about business combination [abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
193 ACQUISITION OF BUSINESS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBusinessCombinationsExplanatory
194 2110100 - Disclosure - ACCOUNTING POLICIES Network

*

*

 http://www.ternium.com/role/AccountingPolicies
195 Implied Table Table

*

*

 implied:Table
196 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
197 ACCOUNTING POLICIES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
198 2113100 - Disclosure - SEGMENT INFORMATION Network

*

*

 http://www.ternium.com/role/SegmentInformation
199 Implied Table Table

*

*

 implied:Table
200 Disclosure of entity's operating segments [Abstract] Abstract tx:DisclosureofentitysoperatingsegmentsAbstract
201 SEGMENT INFORMATION Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
202 2116100 - Disclosure - COST OF SALES Network

*

*

 http://www.ternium.com/role/CostOfSales
203 Implied Table Table

*

*

 implied:Table
204 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
205 COST OF SALES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCostOfSalesExplanatory
206 2119100 - Disclosure - SELLING, GENERAL AND ADMINISTRATIVE EXPENSES Network

*

*

 http://www.ternium.com/role/SellingGeneralAndAdministrativeExpenses
207 Implied Table Table

*

*

 implied:Table
208 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
209 SELLING, GENERAL AND ADMINISTRATIVE EXPENSES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralAndAdministrativeExpenseExplanatory
210 2122100 - Disclosure - LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) Network

*

*

 http://www.ternium.com/role/LaborCostsIncludedCostOfSalesAndSellingGeneralAndAdministrativeExpenses
211 Implied Table Table

*

*

 implied:Table
212 Labor Costs [Abstract] Abstract tx:LaborCostsAbstract
213 LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) Concept (Text Block (HTML)) For Period tx:DisclosureoflaborcostsTextBlock
214 2125100 - Disclosure - OTHER OPERATING INCOME (EXPENSES), NET Network

*

*

 http://www.ternium.com/role/OtherOperatingIncomeExpensesNet
215 Implied Table Table

*

*

 implied:Table
216 Other operating income (expenses), net [Abstract] Abstract tx:OtheroperatingincomeexpensesnetAbstract
217 OTHER OPERATING INCOME (EXPENSES), NET Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExpenseExplanatory
218 2128100 - Disclosure - OTHER FINANCIAL INCOME (EXPENSES), NET Network

*

*

 http://www.ternium.com/role/OtherFinancialIncomeExpensesNet
219 Implied Table Table

*

*

 implied:Table
220 Other financial income (expenses), net [Abstract] Abstract tx:OtherfinancialincomeexpensesnetAbstract
221 OTHER FINANCIAL INCOME (EXPENSES), NET Concept (Text Block (HTML)) For Period tx:DisclosureofotherfinancialincomeexpensesnetTextBlock
222 2131100 - Disclosure - INCOME TAX EXPENSE Network

*

*

 http://www.ternium.com/role/IncomeTaxExpense
223 Implied Table Table

*

*

 implied:Table
224 Disclosure of income tax [Abstract] Abstract tx:DisclosureofincometaxAbstract
225 INCOME TAX EXPENSE Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
226 2134100 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET Network

*

*

 http://www.ternium.com/role/PropertyPlantAndEquipmentNet
227 Implied Table Table

*

*

 implied:Table
228 Disclosure of detailed information about property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
229 PROPERTY, PLANT AND EQUIPMENT, NET Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
230 2137100 - Disclosure - INTANGIBLE ASSETS, NET Network

*

*

 http://www.ternium.com/role/IntangibleAssetsNet
231 Implied Table Table

*

*

 implied:Table
232 Disclosure of detailed information about intangible assets [abstract] Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
233 INTANGIBLE ASSETS, NET Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
234 2140100 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompanies
235 Implied Table Table

*

*

 implied:Table
236 Disclosure of interests in other entities [Abstract] Abstract tx:DisclosureofinterestsinotherentitiesAbstract
237 INVESTMENTS IN NON-CONSOLIDATED COMPANIES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInOtherEntitiesExplanatory
238 2143100 - Disclosure - RECEIVABLES, NET - NON CURRENT AND CURRENT Network

*

*

 http://www.ternium.com/role/ReceivablesNetNonCurrentAndCurrent
239 Implied Table Table

*

*

 implied:Table
240 Receivables, net [Abstract] Abstract tx:ReceivablesnetAbstract
241 RECEIVABLES, NET - NON CURRENT AND CURRENT Concept (Text Block (HTML)) For Period tx:DisclosureofreceivablesnetTextBlock
242 2146100 - Disclosure - TRADE RECEIVABLES, NET - NON CURRENT AND CURRENT Network

*

*

 http://www.ternium.com/role/TradeReceivablesNetNonCurrentAndCurrent
243 Implied Table Table

*

*

 implied:Table
244 Trade and other receivables [abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
245 TRADE RECEIVABLES, NET - NON CURRENT AND CURRENT Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
246 2149100 - Disclosure - INVENTORIES, NET Network

*

*

 http://www.ternium.com/role/InventoriesNet
247 Implied Table Table

*

*

 implied:Table
248 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
249 INVENTORIES, NET Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
250 2152100 - Disclosure - CASH, CASH EQUIVALENTS AND OTHER INVESTMENTS - NON CURRENT AND CURRENT Network

*

*

 http://www.ternium.com/role/CashCashEquivalentsAndOtherInvestmentsNonCurrentAndCurrent
251 Implied Table Table

*

*

 implied:Table
252 Cash, cash equivalents and other investments [Abstract] Abstract tx:CashcashequivalentsandotherinvestmentsAbstract
253 CASH, CASH EQUIVALENTS AND OTHER INVESTMENTS - NON CURRENT AND CURRENT Concept (Text Block (HTML)) For Period tx:DisclosureofcashcashequivalentsandotherinvestmentsTextBlock
254 2155100 - Disclosure - ALLOWANCES AND PROVISIONS - NON CURRENT AND CURRENT Network

*

*

 http://www.ternium.com/role/AllowancesAndProvisionsNonCurrentAndCurrent
255 Implied Table Table

*

*

 implied:Table
256 Provisions [abstract] Abstract ifrs-full:ProvisionsAbstract
257 ALLOWANCES AND PROVISIONS - NON CURRENT AND CURRENT Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
258 2158100 - Disclosure - DEFERRED INCOME TAX Network

*

*

 http://www.ternium.com/role/DeferredIncomeTax
259 Implied Table Table

*

*

 implied:Table
260 Deferred income tax [Abstract] Abstract tx:DeferredincometaxAbstract
261 DEFERRED INCOME TAX Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
262 2161100 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrent
263 Implied Table Table

*

*

 implied:Table
264 Disclosure of other liabilities [Abstract] Abstract tx:DisclosureofotherliabilitiesAbstract
265 OTHER LIABILITIES - NON CURRENT AND CURRENT Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherLiabilitiesExplanatory
266 2164100 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS Network

*

*

 http://www.ternium.com/role/DerivativeFinancialInstruments
267 Implied Table Table

*

*

 implied:Table
268 Disclosure of detailed information about financial instruments [abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
269 DERIVATIVE FINANCIAL INSTRUMENTS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
270 2167100 - Disclosure - FINANCE LEASES Network

*

*

 http://www.ternium.com/role/FinanceLeases
271 Implied Table Table

*

*

 implied:Table
272 Disclosure of leases [Abstract] Abstract tx:DisclosureofleasesAbstract
273 FINANCE LEASES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
274 2170100 - Disclosure - BORROWINGS Network

*

*

 http://www.ternium.com/role/Borrowings
275 Implied Table Table

*

*

 implied:Table
276 Borrowings [abstract] Abstract ifrs-full:BorrowingsAbstract
277 BORROWINGS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBorrowingsExplanatory
278 2173100 - Disclosure - CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS Network

*

*

 http://www.ternium.com/role/ContingenciesCommitmentsAndRestrictionsOnDistributionOfProfits
279 Implied Table Table

*

*

 implied:Table
280 Disclosure of commitments and contingencies [Abstract] Abstract tx:DisclosureofcommitmentsandcontingenciesAbstract
281 CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
282 2176100 - Disclosure - RELATED PARTY TRANSACTIONS Network

*

*

 http://www.ternium.com/role/RelatedPartyTransactions
283 Implied Table Table

*

*

 implied:Table
284 Disclosure of related party [Abstract] Abstract tx:DisclosureofrelatedpartyAbstract
285 RELATED PARTY TRANSACTIONS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
286 2179100 - Disclosure - OTHER REQUIRED DISCLOSURES Network

*

*

 http://www.ternium.com/role/OtherRequiredDisclosures
287 Implied Table Table

*

*

 implied:Table
288 Disclosure of additional information [Abstract] Abstract tx:DisclosureofadditionalinformationAbstract
289 OTHER REQUIRED DISCLOSURES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAdditionalInformationExplanatory
290 2182100 - Disclosure - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS Network

*

*

 http://www.ternium.com/role/RecentlyIssuedAccountingPronouncements
291 Implied Table Table

*

*

 implied:Table
292 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
293 RECENTLY ISSUED ACCOUNTING PRONOUCNEMENTS Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
294 2185100 - Disclosure - FINANCIAL RISK MANAGEMENT Network

*

*

 http://www.ternium.com/role/FinancialRiskManagement
295 Implied Table Table

*

*

 implied:Table
296 Disclosure of notes and other explanatory information [Abstract] Abstract tx:DisclosureofnotesandotherexplanatoryinformationAbstract
297 FINANCIAL RISK MANAGEMENT Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
298 2186100 - Disclosure - SUBSEQUENT EVENTS - Techgen Refinancing Network

*

*

 http://www.ternium.com/role/SubsequentEventsTechgenRefinancing
299 Implied Table Table

*

*

 implied:Table
300 Disclosure of subsequent events [Abstract] Abstract tx:DisclosureofsubsequenteventsAbstract
301 SUBSEQUENT EVENTS - Techgen Refinancing Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
302 2210201 - Disclosure - ACCOUNTING POLICIES (Policies) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesPolicies
303 Implied Table Table

*

*

 implied:Table
304 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
305 Group accounting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
306 Foreign currency translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory
307 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
308 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
309 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
310 Impairment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
311 Other investments Concept (Text Block (HTML)) For Period tx:DescriptionofaccountingpolicyforotherinvestmentsPolicyTextBlock
312 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
313 Trade receivables and other receivables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
314 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
315 Non-current assets (disposal groups) classified as held for sale Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
316 Borrowings Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory
317 Finance leases Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
318 Income taxes - current and deferred Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
319 Employee liabilities Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
320 Provisions and other liabilities Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
321 Trade payables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
322 Revenue recognition and other income Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
323 Borrowing Costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory
324 Cost of sales, selling, general and administrative expenses Concept (Text Block (HTML)) For Period tx:DescriptionofaccountingpolicyforcostofsalessellinggeneralandadministrativeexpensesPolicyTextBlock
325 Stripping costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForStrippingCostsExplanatory
326 Mining development costs Concept (Text Block (HTML)) For Period tx:DescriptionofaccountingpolicyforminingdevelopmentcostsPolicyTextBlock
327 Asset retirement obligations Concept (Text Block (HTML)) For Period tx:DescriptionOfAccountingPolicyForAssetRetirementObligationsPolicyTextBlock
328 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
329 Derivative financial instruments and hedging activities Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory
330 Treasury Shares Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTreasurySharesExplanatory
331 Cash flow Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForCashFlowsExplanatory
332 Critical accounting estimates Concept (Text Block (HTML)) For Period tx:DescriptionofaccountingpolicyforcriticalaccountingestimatesPolicyTextBlock
333 Application of IAS 29 in financial reporting of Argentine subsidiaries and associates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfHyperinflationaryReportingExplanatory
334 Recently issued accounting pronouncements Concept (Text Block (HTML)) For Period tx:DescriptionofaccountingpolicyforrecentlyissuedpronouncementsPolicyTextBlock
335 2304301 - Disclosure - BASIS OF PRESENTATION (Tables) Network

*

*

 http://www.ternium.com/role/BasisOfPresentationTables
336 Implied Table Table

*

*

 implied:Table
337 Disclosure of notes and other explanatory information [Abstract] Abstract tx:DisclosureofnotesandotherexplanatoryinformationAbstract
338 Disclosure of interests in subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
339 2307301 - Disclosure - ACQUISITION OF BUSINESS (Tables) Network

*

*

 http://www.ternium.com/role/AcquisitionOfBusinessTables
340 Implied Table Table

*

*

 implied:Table
341 Disclosure of detailed information about business combination [abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
342 Preliminary allocation of the fair value determined for the assets and liabilities arising from the acquisition Concept (Text Block (HTML)) For Period tx:PreliminaryallocationofthefairvaluedeterminedfortheassetsandliabilitiesarisingfromtheacquisitionTableTextBlock
343 2310302 - Disclosure - ACCOUNTING POLICIES (Tables) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesTables
344 Implied Table Table

*

*

 implied:Table
345 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
346 Disclosure of detailed information about property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
347 2313301 - Disclosure - SEGMENT INFORMATION (Tables) Network

*

*

 http://www.ternium.com/role/SegmentInformationTables
348 Implied Table Table

*

*

 implied:Table
349 Disclosure of entity's operating segments [Abstract] Abstract tx:DisclosureofentitysoperatingsegmentsAbstract
350 Disclosure of operating segments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
351 Disclosure of geographical areas Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
352 Disclosure of products and services Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProductsAndServicesExplanatory
353 2316301 - Disclosure - COST OF SALES (Tables) Network

*

*

 http://www.ternium.com/role/CostOfSalesTables
354 Implied Table Table

*

*

 implied:Table
355 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
356 Schedule of cost of sales Concept (Text Block (HTML)) For Period tx:ScheduleofcostofsalesTableTextBlock
357 2319301 - Disclosure - SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Tables) Network

*

*

 http://www.ternium.com/role/SellingGeneralAndAdministrativeExpensesTables
358 Implied Table Table

*

*

 implied:Table
359 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
360 Schedule of selling, general and administrative expense Concept (Text Block (HTML)) For Period tx:ScheduleofsellinggeneralandadministrativeexpenseTableTextBlock
361 2322301 - Disclosure - LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) (Tables) Network

*

*

 http://www.ternium.com/role/LaborCostsIncludedCostOfSalesAndSellingGeneralAndAdministrativeExpensesTables
362 Implied Table Table

*

*

 implied:Table
363 Labor Costs [Abstract] Abstract tx:LaborCostsAbstract
364 Schedule of labor costs Concept (Text Block (HTML)) For Period tx:ScheduleoflaborcostsTableTextBlock
365 2325301 - Disclosure - OTHER OPERATING INCOME (EXPENSES), NET (Tables) Network

*

*

 http://www.ternium.com/role/OtherOperatingIncomeExpensesNetTables
366 Implied Table Table

*

*

 implied:Table
367 Other operating income (expenses), net [Abstract] Abstract tx:OtheroperatingincomeexpensesnetAbstract
368 Schedule of other operating income (expenses), net Concept (Text Block (HTML)) For Period tx:ScheduleofotheroperatingincomeexpensesnetTableTextBlock
369 2328301 - Disclosure - OTHER FINANCIAL INCOME (EXPENSES), NET (Tables) Network

*

*

 http://www.ternium.com/role/OtherFinancialIncomeExpensesNetTables
370 Implied Table Table

*

*

 implied:Table
371 Other financial income (expenses), net [Abstract] Abstract tx:OtherfinancialincomeexpensesnetAbstract
372 Schedule of other financial income (expenses), net Concept (Text Block (HTML)) For Period tx:ScheduleofotherfinancialincomeexpensesnetTableTextBlock
373 2331301 - Disclosure - INCOME TAX EXPENSE (Tables) Network

*

*

 http://www.ternium.com/role/IncomeTaxExpenseTables
374 Implied Table Table

*

*

 implied:Table
375 Disclosure of income tax [Abstract] Abstract tx:DisclosureofincometaxAbstract
376 Disclosure of major components of tax expense Concept (Text Block (HTML)) For Period tx:DisclosureofMajorComponentsofTaxExpenseIncomeTableTextBlock
377 Schedule of effective income tax rate reconciliation Concept (Text Block (HTML)) For Period tx:ScheduleofEffectiveIncomeTaxRateReconciliationTableTextBlock
378 2334301 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Tables) Network

*

*

 http://www.ternium.com/role/PropertyPlantAndEquipmentNetTables
379 Implied Table Table

*

*

 implied:Table
380 Disclosure of detailed information about property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
381 Disclosure of detailed information about property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
382 2337301 - Disclosure - INTANGIBLE ASSETS, NET (Tables) Network

*

*

 http://www.ternium.com/role/IntangibleAssetsNetTables
383 Implied Table Table

*

*

 implied:Table
384 Disclosure of detailed information about intangible assets [abstract] Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
385 Schedule of changes in intangible assets, net Concept (Text Block (HTML)) For Period tx:ScheduleofchangesinintangibleassetsandgoodwillTableTextBlock
386 2340301 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Tables) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesTables
387 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
388 Legal Entity [Axis] Axis dei:LegalEntityAxis
389 Entity [Domain] Member dei:EntityDomain
390 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
391 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
392 Disclosure of interest in non-consolidated companies Concept (Text Block (HTML)) For Period tx:DisclosureofInterestinNonConsolidatedCompaniesTableTextBlock
393 Disclosure of interests in non-consolidated companies, summarized balance sheet Concept (Text Block (HTML)) For Period tx:DisclosureofinterestsinnonconsolidatedcompaniessummarizedbalancesheetTableTextBlock
394 Disclosure of interests in non-consolidated companies, summarized income statement Concept (Text Block (HTML)) For Period tx:DisclosureofinterestsinnonconsolidatedcompaniessummarizedincomestatementTableTextBlock
395 2343301 - Disclosure - RECEIVABLES, NET - NON CURRENT AND CURRENT (Tables) Network

*

*

 http://www.ternium.com/role/ReceivablesNetNonCurrentAndCurrentTables
396 Implied Table Table

*

*

 implied:Table
397 Receivables, net [Abstract] Abstract tx:ReceivablesnetAbstract
398 Schedule of non-current receivables Concept (Text Block (HTML)) For Period tx:ScheduleofnoncurrentreceivablesTableTextBlock
399 Schedule of current receivables Concept (Text Block (HTML)) For Period tx:ScheduleofcurrentreceivablesTableTextBlock
400 2346301 - Disclosure - TRADE RECEIVABLES, NET - NON CURRENT AND CURRENT (Tables) Network

*

*

 http://www.ternium.com/role/TradeReceivablesNetNonCurrentAndCurrentTables
401 Implied Table Table

*

*

 implied:Table
402 Trade and other receivables [abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
403 Schedule of trade receivables Concept (Text Block (HTML)) For Period tx:ScheduleoftradereceivablesTableTextBlock
404 2349301 - Disclosure - INVENTORIES, NET (Tables) Network

*

*

 http://www.ternium.com/role/InventoriesNetTables
405 Implied Table Table

*

*

 implied:Table
406 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
407 Schedule of Inventory Concept (Text Block (HTML)) For Period tx:ScheduleofInventoryCurrentTableTextBlock
408 2352301 - Disclosure - CASH, CASH EQUIVALENTS AND OTHER INVESTMENTS - NON CURRENT AND CURRENT (Tables) Network

*

*

 http://www.ternium.com/role/CashCashEquivalentsAndOtherInvestmentsNonCurrentAndCurrentTables
409 Implied Table Table

*

*

 implied:Table
410 Cash, cash equivalents and other investments [Abstract] Abstract tx:CashcashequivalentsandotherinvestmentsAbstract
411 Schedule of other investments Concept (Text Block (HTML)) For Period tx:ScheduleofotherinvestmentsTableTextBlock
412 Schedule of cash and cash equivalents Concept (Text Block (HTML)) For Period tx:ScheduleofcashandcashequivalentsTableTextBlock
413 2355301 - Disclosure - ALLOWANCES AND PROVISIONS - NON CURRENT AND CURRENT (Tables) Network

*

*

 http://www.ternium.com/role/AllowancesAndProvisionsNonCurrentAndCurrentTables
414 Implied Table Table

*

*

 implied:Table
415 Provisions [abstract] Abstract ifrs-full:ProvisionsAbstract
416 Schedule of provisions Concept (Text Block (HTML)) For Period tx:ScheduleofprovisionsTableTextBlock
417 2358301 - Disclosure - DEFERRED INCOME TAX (Tables) Network

*

*

 http://www.ternium.com/role/DeferredIncomeTaxTables
418 Implied Table Table

*

*

 implied:Table
419 Deferred income tax [Abstract] Abstract tx:DeferredincometaxAbstract
420 Schedule of changes in deferred income tax Concept (Text Block (HTML)) For Period tx:ScheduleofchangesindeferredincometaxTableTextBlock
421 Changes in deferred tax assets and liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
422 Schedule of deferred tax assets and liabilities Concept (Text Block (HTML)) For Period tx:ScheduleofDeferredTaxAssetsandLiabilitiesTableTextBlock
423 2361301 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT (Tables) Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrentTables
424 Implied Table Table

*

*

 implied:Table
425 Disclosure of other liabilities [Abstract] Abstract tx:DisclosureofotherliabilitiesAbstract
426 Schedule of other non-current liabilities Concept (Text Block (HTML)) For Period tx:ScheduleofothernoncurrentliabilitiesTableTextBlock
427 Schedule of other liabilities recognized in statement of financial position Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
428 Schedule of amounts recognized in income statement Concept (Text Block (HTML)) For Period tx:DisclosureOfDefinedBenefitPlanExpenseRecognizedInProfitOrLossExplanatoryTableTextBlock
429 Schedule of principal actuarial assumptions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
430 Schedule of sensitivity of the defined benefit obligation to changes in the weighted principal assumptions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
431 Schedule of other current liabilities Concept (Text Block (HTML)) For Period tx:ScheduleofothercurrentliabilitiesTableTextBlock
432 2364301 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables) Network

*

*

 http://www.ternium.com/role/DerivativeFinancialInstrumentsTables
433 Implied Table Table

*

*

 implied:Table
434 Disclosure of detailed information about financial instruments [abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
435 Disclosure of detailed information about hedging instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory
436 2367301 - Disclosure - FINANCE LEASES (Tables) Network

*

*

 http://www.ternium.com/role/FinanceLeasesTables
437 Implied Table Table

*

*

 implied:Table
438 Disclosure of leases [Abstract] Abstract tx:DisclosureofleasesAbstract
439 Explanation of significant changes in net investment in finance lease Concept (Text Block (HTML)) For Period ifrs-full:ExplanationOfSignificantChangesInNetInvestmentInFinanceLeaseExplanatory
440 2370301 - Disclosure - BORROWINGS (Tables) Network

*

*

 http://www.ternium.com/role/BorrowingsTables
441 Implied Table Table

*

*

 implied:Table
442 Borrowings [abstract] Abstract ifrs-full:BorrowingsAbstract
443 Disclosure of detailed information about borrowings Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
444 Disclosure of maturities of borrowings Concept (Text Block (HTML)) For Period tx:DisclosureOfMaturitiesOfBorrowingsTableTextBlock
445 2373301 - Disclosure - CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Tables) Network

*

*

 http://www.ternium.com/role/ContingenciesCommitmentsAndRestrictionsOnDistributionOfProfitsTables
446 Implied Table Table

*

*

 implied:Table
447 Disclosure of commitments and contingencies [Abstract] Abstract tx:DisclosureofcommitmentsandcontingenciesAbstract
448 Disclosure of reserves within equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
449 2376301 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) Network

*

*

 http://www.ternium.com/role/RelatedPartyTransactionsTables
450 Implied Table Table

*

*

 implied:Table
451 Disclosure of related party [Abstract] Abstract tx:DisclosureofrelatedpartyAbstract
452 Disclosure of transactions between related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
453 2379301 - Disclosure - OTHER REQUIRED DISCLOSURES (Tables) Network

*

*

 http://www.ternium.com/role/OtherRequiredDisclosuresTables
454 Implied Table Table

*

*

 implied:Table
455 Disclosure of additional information [Abstract] Abstract tx:DisclosureofadditionalinformationAbstract
456 Schedule of condensed statement of comprehensive income Concept (Text Block (HTML)) For Period tx:ScheduleofcondensedstatementofcomprehensiveincomeTableTextBlock
457 Schedule of condensed statement of cash flow Concept (Text Block (HTML)) For Period tx:ScheduleofcondensedstatementofcashflowTableTextBlock
458 Schedule of reconciliation of changes in financial debt Concept (Text Block (HTML)) For Period tx:ScheduleofreconciliationofchangesinfinancialdebtTableTextBlock
459 2382301 - Disclosure - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS (Tables) Network

*

*

 http://www.ternium.com/role/RecentlyIssuedAccountingPronouncementsTables
460 Implied Table Table

*

*

 implied:Table
461 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
462 Disclosure of initial application of standards or interpretations Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations
463 2385301 - Disclosure - FINANCIAL RISK MANAGEMENT (Tables) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementTables
464 Implied Table Table

*

*

 implied:Table
465 Disclosure of notes and other explanatory information [Abstract] Abstract tx:DisclosureofnotesandotherexplanatoryinformationAbstract
466 Sensitivity analysis for types of market risk Concept (Text Block (HTML)) For Period ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk
467 Disclosure of credit risk exposure Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCreditRiskExposureExplanatory
468 Disclosure of how the entity manages liquidity risk Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfManagingLiquidityRisk
469 Disclosure of financial assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
470 Disclosure of financial liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
471 Disclosure of financial instruments at fair value through profit or loss Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory
472 2401401 - Disclosure - GENERAL INFORMATION - Narrative (Details) Network

*

*

 http://www.ternium.com/role/GeneralInformationNarrativeDetails
473 Implied Table Table

*

*

 implied:Table
474 Disclosure of general information about financial statements [Abstract] Abstract tx:DisclosureofgeneralinformationaboutfinancialstatementsAbstract
475 Number of shares authorised (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
476 Par value per share (in dollars per share) Concept (Share) As Of ifrs-full:ParValuePerShare
477 Number of shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
478 Difference between historical carrying amounts of assets and value at which assets were contributed Concept (Monetary) As Of Credit tx:Differencebetweenhistoricalcarryingamountsofassetsandvalueatwhichassetswerecontributed
479 Tax reserve Concept (Monetary) As Of Credit tx:Taxreserve
480 2404402 - Disclosure - BASIS OF PRESENTATION (Disclosure of interest in subsidiaries) (Details) Network

*

*

 http://www.ternium.com/role/BasisOfPresentationDisclosureOfInterestInSubsidiariesDetails
481 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
482 Legal Entity [Axis] Axis dei:LegalEntityAxis
483 Entity [Domain] Member dei:EntityDomain
484 Ternium Investments S.à.r.l. Member tx:TerniumInvestmentsS..r.l.Member
485 Ternium Internacional España S.L.U. Member tx:TerniumInternacionalEspaaS.L.U.Member
486 Ternium Argentina S.A. and Soluciones Integrales de Gestion S.A Member tx:TerniumArgentinaS.A.andSolucionesIntegralesdeGestionS.AMember
487 Ternium Argentina S.A. and Ternium Procurement S.A. Member tx:TerniumArgentinaS.A.andTerniumProcurementS.A.Member
488 Ternium Mexico S.A. de C.V. Member tx:TerniumMexicoS.A.deC.V.Member
489 Ternium Mexico S.A. de C.V and Tenigal S. de R.L. de C.V. Member tx:TerniumMexicoS.A.deC.VandTenigalS.deR.L.deC.V.Member
490 Ternium S.A. Member tx:TerniumS.A.Member
491 Ternium International Switzerland S.A Member tx:TerniumInvestmentsSwitzerlandAGMember
492 Technology & Engineering Services S.A. and Ternium Mexico S..A. de C.V. Member tx:TechnologyEngineeringServicesS.A.andTerniumMexicoS..A.deC.V.Member
493 Ternium Investments S.a.r.l & Ternium Internacional Espana S.L.U. Member tx:TerniumInvestmentsS.a.r.lTerniumInternacionalEspanaS.L.U.Member
494 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
495 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
496 Ternium S.A. Member tx:TerniumS.A.Member
497 Ternium Investments S.à.r.l. Member tx:TerniumInvestmentsS..r.l.Member
498 Ternium Solutions A.G. Member tx:TerniumSolutionsA.G.Member
499 Ternium Participacoes S.A. Member tx:TerniumParticipacoesS.A.formerlyTerniumBrasilS.A.Member
500 Ternium International Switzerland S.A Member tx:TerniumInvestmentsSwitzerlandAGMember
501 Ternium Internacional España S.L.U. Member tx:TerniumInternacionalEspaaS.L.U.Member
502 Ternium USA Inc. Member tx:TerniumUSAInc.Member
503 Ternium Argentina S.A. Member tx:TerniumArgentinaS.A.formerlySiderarS.A.I.C.Member
504 Impeco S.A. Member tx:ImpecoS.A.Member
505 Prosid Investments S.A. Member tx:ProsidInvestmentsS.A.Member
506 Ternium Mexico S.A. de C.V. Member tx:TerniumMexicoS.A.deC.V.Member
507 Hylsa S.A. de C.V. Member tx:HylsaS.A.deC.V.Member
508 Las Encinas S.A. de C.V. Member tx:LasEncinasS.A.deC.V.Member
509 Ferropak Comercial S.A. de C.V. Member tx:FerropakComercialS.A.deC.V.Member
510 Transamerica E. & I. Trading Corp. Member tx:TransamericaE.I.TradingCorp.Member
511 Técnica Industrial S.A. de C.V. Member tx:TcnicaIndustrialS.A.deC.V.Member
512 Galvacer Chile SA Member tx:GalvacerChileSAMember
513 Imsamex Ecuador, S.A. Member tx:ImsamexEcuadorS.A.Member
514 Ternium Gas México S.A. de C.V. Member tx:TerniumGasMexicoS.A.deC.V.Member
515 Consorcio Minero Benito Juarez Peña Colorada Member tx:ConsorcioMineroBenitoJuarezPeaColoradaS.A.deC.V.Member
516 Peña Colorada Servicios S.A. de C.V. Member tx:PeaColoradaServiciosS.A.deC.V.Member
517 Exiros B.V. Member tx:ExirosB.V.Member
518 Servicios Integrales Nova de Monterrey S.A. de C.V. Member tx:ServiciosIntegralesNovadeMonterreyS.A.deC.V.Member
519 Ternium Internacional Nicaragua S.A. Member tx:TerniumInternacionalNicaraguaS.A.Member
520 Ternium Internacional Honduras S.A. de C.V. Member tx:TerniumInternacionalHondurasS.A.deC.V.Member
521 Ternium Internacional El Salvador S.A. de C.V. Member tx:TerniumInternacionalElSalvadorS.A.deC.V.Member
522 Ternium Internacional Costa Rica S.A. Member tx:TerniumInternacionalCostaRicaS.A.Member
523 Ternium Internacional Guatemala S.A. Member tx:TerniumInternacionalGuatemalaS.A.Member
524 Ternium Colombia S.A.S (formerly Ferrasa S.A.S) Member tx:TerniumColombiaS.A.SformerlyFerrasaS.A.SMember
525 Ternium del Cauca S.A.S. (formerly Perfilamos del Cauca S.A.S.) Member tx:TerniumdelCaucaS.A.S.formerlyPerfilamosdelCaucaS.A.S.Member
526 Ternium Siderúrgica de Caldas S.A.S. (formerly Siderúrgica de Caldas S.A.S.) Member tx:TerniumSiderrgicadeCaldasS.A.S.formerlySiderrgicadeCaldasS.A.S.Member
527 Tenigal S. de R.L. de C.V. Member tx:TenigalS.deR.L.deC.V.Member
528 Ternium Internacional S.A. Member tx:TerniumInternacionalS.A.Member
529 Ternium Treasury Services S.A. Member tx:TerniumTreasuryServicesS.A.Member
530 Ternium Internationaal B.V. Member tx:TerniumInternationalB.V.Member
531 Ternium International Inc. Member tx:TerniumInternationalInc.Member
532 Ternium Procurement S.A. Member tx:TerniumProcurementS.A.Member
533 Technology & Engineering Services S.A. Member tx:TechnologyEngineeringServicesS.A.Member
534 Ternium International USA Corporation Member tx:TerniumInternationalUSACorporationMember
535 Ternium Ingeniería y Servicios de Mexico S.A. de C.V. Member tx:TerniumIngenierayServiciosdeMexicoS.A.deC.V.Member
536 Soluciones Integrales de Gestion S.A. Member tx:SolucionesIntegralesdeGestionS.A.Member
537 Ternium Staal B.V. Member tx:TerniumStaalB.V.Member
538 Ternium Brasil Ltda. Member tx:TerniumBrasilLtda.Member
539 Ternium del Atlantico S.A.S Member tx:TerniumdelAtlanticoS.A.SMember
540 Ternium Solutions S.A. Member tx:TerniumSolutionsS.A.Member
541 Acedor, S.A. de C.V. Member tx:AcedorS.A.deC.V.Member
542 Ecosteel Gestao de Efuentes Industriais S,A. Member tx:EcosteelGestaodeEfuentesIndustriaisSA..Member
543 Galvatubing Inc Member tx:GalvatubingIncMember
544 Galvamet America Corp Member tx:GalvametAmericaCorpMember
545 Ternium Internacional de Colombia S.A.S. Member tx:TerniumInternacionaldeColombiaS.A.S.Member
546 Ecosteel Gestao de Aguas Industriais S.A. Member tx:EcosteelGestaodeAguasIndustriaisS.A.Member
547 Galvacer America Inc Member tx:GalvacerAmericaIncMember
548 Ternium Solutions A.G., Ternium Participacoes S.A., Ternium Investments Switzerland AG, Ternium Internacional Espana S.L.U. & Ternium USA Inc. Member tx:TerniumSolutionsA.G.TerniumParticipacoesS.A.TerniumInvestmentsSwitzerlandAGTerniumInternacionalEspanaS.L.U.TerniumUSAInc.Member
549 Hysla S.A. de C.V., Las Encinas S.A. de C.V., Ferropak Comercial S.A. de C.V., Transamerica E. & I. Trading Corp., Tecnica Industrial S.A. de C.V., Galvacer Chile SA & Imsamex Ecuador, S.A. Member tx:HyslaS.A.deC.V.LasEncinasS.A.deC.V.FerropakComercialS.A.deC.V.TransamericaE.I.TradingCorp.TecnicaIndustrialS.A.deC.V.GalvacerChileSAImsamexEcuadorS.A.Member
550 Consorcio Minero Benito Juarez Pena Colorada, Pena Colorada Servicios S.A. de C.V. & Exiros B.V Member tx:ConsorcioMineroBenitoJuarezPenaColoradaPenaColoradaServiciosS.A.deC.V.ExirosB.VMember
551 Ternium Internacional Guatemala S.A., Ternium Colombia S.A.S., Ternium del Cauca S.A.S. & Ternium Siderurgica de Caldas S.A.S. Member tx:TerniumInternacionalGuatemalaS.A.TerniumColombiaS.A.S.TerniumdelCaucaS.A.S.TerniumSiderurgicadeCaldasS.A.S.Member
552 Ternium Internacional S.A. & Ternium Treasury Services S.A. Member tx:TerniumInternacionalS.A.TerniumTreasuryServicesS.A.Member
553 Ternium Internationaal B.V. & Ternium International Inc. Member tx:TerniumInternationaalB.V.TerniumInternationalInc.Member
554 Ternium Procurement S.A. & Technology & Engineering Services S.A. Member tx:TerniumProcurementS.A.TechnologyEngineeringServicesS.A.Member
555 Ternium Staal B.V. & Ternium Brasil Ltda. Member tx:TerniumStaalB.V.TerniumBrasilLtda.Member
556 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
557 Proportion of ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
558 Proportion of voting rights held in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
559 2404403 - Disclosure - BASIS OF PRESENTATION (Narrative) (Details) Network

*

*

 http://www.ternium.com/role/BasisOfPresentationNarrativeDetails
560 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
561 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
562 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
563 Ternium Argentina S.A. Member tx:TerniumArgentinaS.A.formerlySiderarS.A.I.C.Member
564 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
565 Net sales Concept (Monetary) For Period Credit ifrs-full:Revenue
566 Profit (loss) from continuing operations attributable to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperationsAttributableToNoncontrollingInterests
567 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
568 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
569 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
570 2407402 - Disclosure - ACQUISITION OF BUSINESS - Thyssenkrupp Slab International B.V. & CSA Siderrgica do Atlantico Ltda. (Narrative) (Details) Network

*

*

 http://www.ternium.com/role/AcquisitionOfBusinessThyssenkruppSlabInternationalBVCsaSiderrgicaDoAtlanticoLtdaNarrativeDetails
571 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
572 Credit Facility [Axis] Axis tx:CreditFacility1Axis
573 Credit Facility [Domain] Member tx:CreditFacility1Domain
574 Syndicated Facility Member tx:SyndicatedFacilityMember
575 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
576 Other provisions [member] Member ifrs-full:OtherProvisionsMember
577 Other environment related provision Member ifrs-full:OtherEnvironmentRelatedProvisionMember
578 Legal proceedings contingent liability Member ifrs-full:LegalProceedingsContingentLiabilityMember
579 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
580 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
581 Thyssenkrupp Slab International B.V. & CSA Siderúrgica do Atlântico Ltda. Member tx:ThyssenkruppSlabInternationalB.V.CSASiderrgicadoAtlnticoLtda.Member
582 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
583 Percentage of voting equity interests acquired Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
584 Annual production capacity of steel (tons) Concept (num:weightItemType) For Period tx:Annualproductioncapacityofsteel
585 Number of megawatts (per year) Concept (num:powerItemType) For Period tx:Numberofmegawatts
586 Slabs supplied (tons per year) Concept (num:weightItemType) As Of tx:Slabssupplied
587 Consideration transferred, acquisition-date fair value Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
588 Financial instruments designated as hedging instruments, at fair value Concept (Monetary) As Of ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
589 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
590 Tax benefit recognised as of acquisition date Concept (Monetary) As Of Credit tx:Taxbenefitrecognisedasofacquisitiondate
591 Acquisitions through business combinations, other provisions Concept (Monetary) For Period Credit ifrs-full:AcquisitionsThroughBusinessCombinationsOtherProvisions
592 Asset recognised for expected reimbursement, contingent liabilities in business combination Concept (Monetary) As Of Debit ifrs-full:AssetRecognisedForExpectedReimbursementContingentLiabilitiesInBusinessCombination
593 Estimated financial effect, contingent liabilities in business combination Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectContingentLiabilitiesInBusinessCombination
594 Debt instrument, term Concept (xbrli:durationItemType) For Period tx:DebtInstrumentTerm1
595 Notional amount Concept (Monetary) As Of Credit tx:LineofCreditFacilityNotionalAmount
596 Number of installments Concept (Integer) For Period tx:Numberofconsecutiveandequalsemiannualinstallments
597 Prepayments of principal Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
598 Total borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
599 2407403 - Disclosure - ACQUISITION OF BUSINESS - Preliminary allocation of the fair value determined for the assets and liabilities arising from the acquisition (Details) Network

*

*

 http://www.ternium.com/role/AcquisitionOfBusinessPreliminaryAllocationOfFairValueDeterminedForAssetsAndLiabilitiesArisingFromAcquisitionDetails
600 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
601 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
602 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
603 Thyssenkrupp Slab International B.V. & CSA Siderúrgica do Atlântico Ltda. Member tx:ThyssenkruppSlabInternationalB.V.CSASiderrgicadoAtlnticoLtda.Member
604 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
605 Property, plant and equipment and Intangible assets Concept (Monetary) As Of Debit tx:Propertyplantandequipmentandintangibleassets
606 Inventories Concept (Monetary) As Of Debit ifrs-full:InventoryRecognisedAsOfAcquisitionDate
607 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
608 Trade receivables Concept (Monetary) As Of Debit tx:Tradereceivablesrecognisedasofacquisitiondate
609 Other receivables Concept (Monetary) As Of Debit tx:Otherreceivablesrecognisedasofacquisitiondate
610 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssetsRecognisedAsOfAcquisitionDate
611 Provisions Concept (Monetary) As Of Credit tx:Provisionsrecognisedasofacquisitiondate
612 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate
613 Other assets and liabilities, net Concept (Monetary) As Of Debit tx:Otherassetsandliabilitiesnetrecognisedasofacquisitiondate
614 Net assets acquired Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsRecognisedAsOfAcquisitionDate
615 2410403 - Disclosure - ACCOUNTING POLICIES (Financial instruments) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesFinancialInstrumentsDetails
616 Implied Table Table

*

*

 implied:Table
617 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
618 Held-to-maturity investments Concept (Monetary) As Of Debit ifrs-full:HeldtomaturityInvestments
619 2410404 - Disclosure - ACCOUNTING POLICIES (Useful life of property, plant & equipment) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesUsefulLifeOfPropertyPlantEquipmentDetails
620 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
621 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
622 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
623 Buildings and improvements Member tx:BuildingsandimprovementsMember
624 Production equipment Member ifrs-full:MachineryMember
625 Vehicles, furniture and fixtures Member tx:VehiclefurnitureandfixturesMember
626 Range [axis] Axis ifrs-full:RangeAxis
627 Ranges [member] Member ifrs-full:RangesMember
628 Bottom of range Member ifrs-full:BottomOfRangeMember
629 Top of range Member ifrs-full:TopOfRangeMember
630 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
631 Useful life, property, plant and equipment Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
632 2410405 - Disclosure - ACCOUNTING POLICIES (Intangible assets) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesIntangibleAssetsDetails
633 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
634 Range [axis] Axis ifrs-full:RangeAxis
635 Ranges [member] Member ifrs-full:RangesMember
636 Bottom of range Member ifrs-full:BottomOfRangeMember
637 Top of range Member ifrs-full:TopOfRangeMember
638 Segments [axis] Axis ifrs-full:SegmentsAxis
639 Segments [member] Member ifrs-full:SegmentsMember
640 Steel Member tx:SteelMember
641 Mining Member tx:MiningMember
642 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
643 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
644 Cash-generating units Member ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember
645 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
646 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
647 Information system projects Member tx:InformationsystemprojectsMember
648 Customer relationships and other contractual rights Member ifrs-full:CustomerrelatedIntangibleAssetsMember
649 Trademarks Member ifrs-full:BrandNamesMember
650 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
651 Amortisation period (not exceeding) Concept (xbrli:durationItemType) For Period tx:Amortisationperiod
652 Mining concession, period Concept (xbrli:durationItemType) For Period tx:Miningconcessionperiod
653 Mining concession, additional term Concept (xbrli:durationItemType) For Period tx:Miningconcessionadditionalterm
654 Amortisation rates, intangible assets other than goodwill Concept (Percent) For Period tx:Amortisationrates
655 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
656 Research and development expense Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
657 Useful lives or amortisation rates, intangible assets other than goodwill Concept (Text/String) For Period ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
658 2410406 - Disclosure - ACCOUNTING POLICIES (Impairment) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesImpairmentDetails
659 Disclosure of impairment loss and reversal of impairment loss [table] Table

*

*

 ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable
660 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
661 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
662 Argentina Member country:AR
663 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
664 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
665 Subsidiaries Member ifrs-full:SubsidiariesMember
666 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
667 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
668 Cash-generating units Member ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember
669 Disclosure of impairment loss and reversal of impairment loss [line items] LineItems ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems
670 Discount rate used in current estimate of value in use Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
671 2410407 - Disclosure - ACCOUNTING POLICIES (Non-current assets (disposal groups) classified as held for sale) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesNonCurrentAssetsDisposalGroupsClassifiedAsHeldForSaleDetails
672 Implied Table Table

*

*

 implied:Table
673 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
674 Non-current assets or disposal groups classified as held for sale Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
675 2410408 - Disclosure - ACCOUNTING POLICIES (Employee liabilities) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesEmployeeLiabilitiesDetails
676 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
677 Plan Name [Axis] Axis tx:PlanName1Axis
678 Plan Name [Domain] Member tx:PlanName1Domain
679 Incentive Retention Program Member tx:IncentiveRetentionProgramMember
680 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
681 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
682 Capital Units Member tx:CapitalUnits1Member
683 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
684 Vesting period (years) Concept (xbrli:durationItemType) For Period tx:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod
685 Redemption, period (years) Concept (xbrli:durationItemType) For Period tx:SharebasedCompensationArrangementbySharebasedPaymentAwardRedemptionPeriod
686 Early redemption, period (years) Concept (xbrli:durationItemType) For Period tx:SharebasedCompensationArrangementbySharebasedPaymentAwardEarlyRedemptionPeriod
687 Deferred compensation share-based arrangements, liability Concept (Monetary) As Of Credit tx:DeferredCompensationSharebasedArrangementsLiability
688 Stock granted, value Concept (Monetary) As Of Credit tx:StockGrantedValueSharebasedCompensationGross
689 2410409 - Disclosure - ACCOUNTING POLICIES (Borrowing Costs) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesBorrowingCostsDetails
690 Implied Table Table

*

*

 implied:Table
691 Disclosure of significant accounting policies [Abstract] Abstract tx:DisclosureofsignificantaccountingpoliciesAbstract
692 Borrowing costs capitalised Concept (Monetary) For Period ifrs-full:BorrowingCostsCapitalised
693 2410410 - Disclosure - ACCOUTNING POLICIES (Derivative financial instruments and hedging activities) (Details) Network

*

*

 http://www.ternium.com/role/AccoutningPoliciesDerivativeFinancialInstrumentsAndHedgingActivitiesDetails
694 Derivative instruments, gain (loss) [Table] Table

*

*

 tx:DerivativeinstrumentsgainlossTable
695 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
696 Hedges [member] Member ifrs-full:TypesOfHedgesMember
697 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
698 Derivative instruments, gain (loss) [Line Items] LineItems tx:DerivativeinstrumentsgainlossLineItems
699 Effective portion of hedge Concept (Monetary) For Period Credit tx:DerivativeInstrumentsGainRecognizedinOtherComprehensiveIncomeLossEffectivePortion
700 2410411 - Disclosure - ACCOUNTING POLICIES (Critical accounting estimates) (Details) Network

*

*

 http://www.ternium.com/role/AccountingPoliciesCriticalAccountingEstimatesDetails
701 Disclosure of changes in accounting estimates [table] Table

*

*

 ifrs-full:DisclosureOfChangesInAccountingEstimatesTable
702 Valuation Allowances and Reserves Type [Axis] Axis tx:ValuationAllowancesandReservesTypeAxis
703 Valuation Allowances and Reserves Type [Domain] Member tx:ValuationAllowancesandReservesTypeDomain
704 Allowance for Doubtful Accounts Member tx:AllowanceforDoubtfulAccountsMember
705 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
706 Other provisions [member] Member ifrs-full:OtherProvisionsMember
707 Legal claims and other matters Member ifrs-full:LegalProceedingsProvisionMember
708 Disclosure of changes in accounting estimates [line items] LineItems ifrs-full:DisclosureOfChangesInAccountingEstimatesLineItems
709 Discount rate used to test investment for impairment Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
710 Provisions Concept (Monetary) As Of Credit ifrs-full:Provisions
711 Inventory write-down Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
712 Valuation allowance Concept (Monetary) As Of Credit tx:ValuationAllowancesandReservesBalance
713 2413402 - Disclosure - SEGMENT INFORMATION (Narrative) (Details) Network

*

*

 http://www.ternium.com/role/SegmentInformationNarrativeDetails
714 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
715 Segments [axis] Axis ifrs-full:SegmentsAxis
716 Segments [member] Member ifrs-full:SegmentsMember
717 Steel Member tx:SteelMember
718 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
719 Counterparties [member] Member ifrs-full:CounterpartiesMember
720 Las Encinas Member tx:LasEncinasMember
721 Peña Colorada Member tx:PeaColoradaMember
722 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
723 Number of reportable segments Concept (Integer) For Period tx:NumberofReportableSegments1
724 Number of operating segments Concept (Integer) For Period tx:NumberofOperatingSegments1
725 Percentage of equity interest Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
726 Proportion of ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
727 2413403 - Disclosure - SEGMENT INFORMATION (Segment reporting information, by segment) (Details) Network

*

*

 http://www.ternium.com/role/SegmentInformationSegmentReportingInformationBySegmentDetails
728 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
729 Legal Entity [Axis] Axis dei:LegalEntityAxis
730 Entity [Domain] Member dei:EntityDomain
731 Ternium Member tx:TerniumMember
732 Segments [axis] Axis ifrs-full:SegmentsAxis
733 Segments [member] Member ifrs-full:SegmentsMember
734 Steel Member tx:SteelMember
735 Mining Member tx:MiningMember
736 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
737 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
738 Operating segments Member ifrs-full:OperatingSegmentsMember
739 Inter- segment eliminations Member ifrs-full:EliminationOfIntersegmentAmountsMember
740 Reconciling items Member ifrs-full:MaterialReconcilingItemsMember
741 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
742 Net sales Concept (Monetary) For Period Credit ifrs-full:Revenue
743 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
744 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
745 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
746 Other operating income (expenses), net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
747 Profit (loss) from operating activities Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
748 Effect of inflation adjustment Concept (Monetary) For Period Debit tx:Effectofinflationadjustment
749 Other financial income (expenses), net Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
750 Equity in earnings (losses) of non-consolidated companies Concept (Monetary) For Period Credit tx:Shareofprofitlossofassociatesandjointventuresaccountedforusingequitymethodincludingimpairment
751 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
752 Depreciation and amortisation expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
753 Effect of inflation adjustment on net sales Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentonnetsales
754 Effect of inflation adjustment on cost of sales Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentoncostofsales
755 Effect of inflation adjustment on selling, general and administrative expense Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentonsellinggeneralandadministrativeexpense
756 Effect of inflation adjustment on other operating expenses, net Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentonotheroperatingexpensesnet
757 2413404 - Disclosure - SEGMENT INFORMATION (Net sales and long lived assets by geographic areas) (Details) Network

*

*

 http://www.ternium.com/role/SegmentInformationNetSalesAndLongLivedAssetsByGeographicAreasDetails
758 Disclosure of geographical areas [table] Table

*

*

 ifrs-full:DisclosureOfGeographicalAreasTable
759 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
760 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
761 Mexico Member country:MX
762 Southern region Member tx:SouthernregionMember
763 Brazil and other markets Member tx:BrazilandothermarketsMember
764 Other markets Member tx:OthermarketsMember
765 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
766 Net sales Concept (Monetary) For Period Credit ifrs-full:Revenue
767 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
768 2413405 - Disclosure - SEGMENT INFORMATION (Revenue by product) (Details) Network

*

*

 http://www.ternium.com/role/SegmentInformationRevenueByProductDetails
769 Disclosure of products and services [table] Table

*

*

 ifrs-full:DisclosureOfProductsAndServicesTable
770 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
771 Products and services [member] Member ifrs-full:ProductsAndServicesMember
772 Semi-finished Member tx:SemifinishedMember
773 Slabs Member tx:SlabsMember
774 Hot rolled Member tx:HotrolledMember
775 Cold rolled Member tx:ColdrolledMember
776 Coated Member tx:CoatedMember
777 Roll-formed and tubular Member tx:RollformedandtubularMember
778 Other products Member tx:OtherproductsMember
779 Total sales Member tx:TotalsalesMember
780 Disclosure of products and services [line items] LineItems ifrs-full:DisclosureOfProductsAndServicesLineItems
781 Net sales Concept (Monetary) For Period Credit ifrs-full:Revenue
782 2416402 - Disclosure - COST OF SALES (Details) Network

*

*

 http://www.ternium.com/role/CostOfSalesDetails
783 Implied Table Table

*

*

 implied:Table
784 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
785 Inventories at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:Inventories
786 Acquisition of business (Note 3) Concept (Monetary) For Period Debit tx:Acquisitionsthroughbusinesscombinationsinventories
787 Effect of initial inflation adjustment Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentinventories
788 Translation differences Concept (Monetary) For Period Credit tx:Foreigncurrencytranslationdifferences
789 Raw materials and consumables used and other movements Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
790 Services and fees Concept (Monetary) For Period Debit tx:ServicesandfeesexpenseCostofSales
791 Labor cost Concept (Monetary) For Period Debit tx:LaborcostsCostofSales
792 Depreciation of property, plant and equipment Concept (Monetary) For Period Debit tx:DepreciationpropertyplantandequipmentCostofSales
793 Amortization of intangible assets Concept (Monetary) For Period Debit tx:AmortisationintangibleassetsotherthangoodwillCostofSales
794 Maintenance expenses Concept (Monetary) For Period Debit tx:RepairandmaintenanceexpenseCostofSales
795 Office expenses Concept (Monetary) For Period Debit tx:OfficeexpensesCostofSales
796 Insurance Concept (Monetary) For Period Debit ifrs-full:InsuranceExpense
797 Charge of obsolescence allowance Concept (Monetary) For Period Debit ifrs-full:WritedownsReversalsOfInventories
798 Recovery from sales of scrap and by-products Concept (Monetary) For Period Credit tx:Recoveryfromsalesofscrapandbyproducts
799 Others Concept (Monetary) For Period Debit tx:OtherexpensebyfunctionCostofSales
800 Less: Inventories at the end of the year Concept (Monetary) As Of Debit ifrs-full:Inventories
801 Cost of Sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
802 2419402 - Disclosure - SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Details) Network

*

*

 http://www.ternium.com/role/SellingGeneralAndAdministrativeExpensesDetails
803 Selling, general and administrative expense [Table] Table

*

*

 tx:SellinggeneralandadministrativeexpenseTable
804 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
805 Counterparties [member] Member ifrs-full:CounterpartiesMember
806 PricewaterhouseCoopers Member tx:PricewaterhouseCoopersMember
807 Selling, general and administrative expense [Line Items] LineItems tx:SellinggeneralandadministrativeexpenseLineItems
808 Services and fees Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
809 Labor cost Concept (Monetary) For Period Debit tx:LaborcostsSGA
810 Depreciation of property, plant and equipment Concept (Monetary) For Period Debit tx:DepreciationpropertyplantandequipmentSGA
811 Amortization of intangible assets Concept (Monetary) For Period Debit tx:AmortisationintangibleassetsotherthangoodwillSGA
812 Maintenance and expenses Concept (Monetary) For Period Debit tx:RepairandmaintenanceexpenseSGA
813 Taxes Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
814 Office expenses Concept (Monetary) For Period Debit tx:OfficeexpensesSGA
815 Freight and transportation Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
816 Increase of allowance for doubtful accounts Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInAllowanceAccountForCreditLossesOfFinancialAssets
817 Others Concept (Monetary) For Period Debit tx:OtherexpensebyfunctionSGA
818 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
819 Auditor's remuneration Concept (Monetary) For Period Debit ifrs-full:AuditorsRemuneration
820 Auditor's remuneration for audit services Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForAuditServices
821 Auditor's remuneration for audit-related services Concept (Monetary) For Period Debit tx:Auditorsremunerationforauditrelatedservices
822 Auditor's remuneration for tax services Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForTaxServices
823 Auditor's remuneration for other services Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForOtherServices
824 2422402 - Disclosure - LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) (Details) Network

*

*

 http://www.ternium.com/role/LaborCostsIncludedCostOfSalesAndSellingGeneralAndAdministrativeExpensesDetails
825 Implied Table Table

*

*

 implied:Table
826 Labor Costs [Abstract] Abstract tx:LaborCostsAbstract
827 Wages, salaries and social security costs Concept (Monetary) For Period Debit ifrs-full:ShorttermEmployeeBenefitsExpense
828 Termination benefits Concept (Monetary) For Period Debit ifrs-full:TerminationBenefitsExpense
829 Post-employment benefits Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
830 Labor costs Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
831 Number of employees Concept (Decimal) As Of ifrs-full:NumberOfEmployees
832 2425402 - Disclosure - OTHER OPERATING INCOME (EXPENSES), NET (Details) Network

*

*

 http://www.ternium.com/role/OtherOperatingIncomeExpensesNetDetails
833 Implied Table Table

*

*

 implied:Table
834 Other operating income (expenses), net [Abstract] Abstract tx:OtheroperatingincomeexpensesnetAbstract
835 Results of sundry assets Concept (Monetary) For Period Credit tx:Resultsofsundryassets
836 Provision for legal claims and other matters Concept (Monetary) For Period Credit tx:Provisionforlegalclaimsandothermattersnetreversals
837 Other operating income Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
838 Other operating income Concept (Monetary) For Period Credit tx:Otheroperatingincome
839 Provision for legal claims and other matters Concept (Monetary) For Period Debit tx:Provisionforlegalclaimsandothermatters
840 Other operating expense Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
841 Other operating expense Concept (Monetary) For Period Debit tx:Otheroperatingexpense
842 Other operating (expenses) income, net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
843 2428402 - Disclosure - OTHER FINANCIAL INCOME (EXPENSES), NET (Details) Network

*

*

 http://www.ternium.com/role/OtherFinancialIncomeExpensesNetDetails
844 Derivative instruments, gain (loss) [Table] Table

*

*

 tx:DerivativeinstrumentsgainlossTable
845 Derivative instrument [Axis] Axis tx:DerivativeinstrumentAxis
846 Derivative instrument [Domain] Member tx:DerivativeinstrumentDomain
847 Foreign exchange contract Member tx:ForeignexchangecontractMember
848 Derivative instruments, gain (loss) [Line Items] LineItems tx:DerivativeinstrumentsgainlossLineItems
849 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
850 Finance expense Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
851 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
852 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
853 Net foreign exchange (loss) gain Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
854 Inflation adjustment results Concept (Monetary) For Period Credit tx:Inflationadjustmentresults
855 Change in fair value of financial assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
856 Derivative contract results Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
857 Others Concept (Monetary) For Period Credit tx:Miscellaneousfinancialincomecost
858 Other financial income (expenses), net Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
859 2431402 - Disclosure - INCOME TAX EXPENSE (Income tax expense) (Details) Network

*

*

 http://www.ternium.com/role/IncomeTaxExpenseIncomeTaxExpenseDetails
860 Major components of tax expense (income) [Table] Table

*

*

 tx:MajorcomponentsoftaxexpenseincomeTable
861 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
862 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
863 Argentina Member country:AR
864 United States Member country:US
865 Major components of tax expense (income) [Line Items] LineItems tx:MajorcomponentsoftaxexpenseincomeLineItems
866 Current tax Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
867 Effect of changes in tax law Concept (Monetary) For Period Debit tx:Currenttaxexpenseincomerelatingtotaxratechangesorimpositionofnewtaxes
868 Deferred tax Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
869 Effect of changes in tax law Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
870 Withholding tax on dividend distributions Concept (Monetary) For Period Debit tx:Deferredtaxexpenseincomerelatingtowithholdingtaxondividenddistributions
871 Recovery of income tax Concept (Monetary) For Period Debit tx:Deferredtaxexpenseincomerelatingtotherecoveryofincometax
872 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
873 Deferred income tax benefit Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
874 Withholding tax rate Concept (Percent) For Period tx:Withholdingtaxrate
875 2431403 - Disclosure - INCOME TAX EXPENSE (Reconciliation of effective income tax) (Details) Network

*

*

 http://www.ternium.com/role/IncomeTaxExpenseReconciliationOfEffectiveIncomeTaxDetails
876 Implied Table Table

*

*

 implied:Table
877 Disclosure of income tax [Abstract] Abstract tx:DisclosureofincometaxAbstract
878 Income before income tax Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
879 Income tax expense at statutory tax rate Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
880 Non taxable income Concept (Monetary) For Period Credit ifrs-full:TaxEffectOfRevenuesExemptFromTaxation2011
881 Non deductible expenses Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
882 Effect of currency translation on tax base Concept (Monetary) For Period Debit tx:Effectofcurrencytranslationontaxbase
883 Recovery of income tax Concept (Monetary) For Period Debit tx:Taxeffectofrecoveryofincometax
884 Withholding tax on dividend distributions Concept (Monetary) For Period Debit tx:Taxeffectofwithholdingtaxondividenddistributions
885 Effect of changes in tax law Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
886 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
887 2434402 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Details) Network

*

*

 http://www.ternium.com/role/PropertyPlantAndEquipmentNetDetails
888 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
889 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
890 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
891 Land Member ifrs-full:LandMember
892 Buildings and improvements Member tx:BuildingsandimprovementsMember
893 Production equipment Member ifrs-full:MachineryMember
894 Vehicles, furniture and fixtures Member tx:VehiclefurnitureandfixturesMember
895 Work in progress Member ifrs-full:ConstructionInProgressMember
896 Spare parts Member tx:SparepartsMember
897 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
898 Carrying amount [member] Member ifrs-full:CarryingAmountMember
899 Cost Member ifrs-full:GrossCarryingAmountMember
900 Accumulated depreciation Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
901 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
902 Property, plant and equipment, beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
903 Effect of inflation adjustment Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentpropertyplantandequipment
904 Translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
905 Acquisition of business (note 3) Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
906 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
907 Capitalized borrowing costs Concept (Monetary) For Period ifrs-full:BorrowingCostsCapitalised
908 Disposals / Consumptions Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
909 Transfers Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment
910 Depreciation charge Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
911 Property, plant and equipment, ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
912 2437402 - Disclosure - INTANGIBLE ASSETS, NET (Details) Network

*

*

 http://www.ternium.com/role/IntangibleAssetsNetDetails
913 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
914 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
915 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
916 Information system projects Member tx:InformationsystemprojectsMember
917 Mining assets Member ifrs-full:MiningRightsMember
918 Exploration and evaluation costs Member ifrs-full:IntangibleExplorationAndEvaluationAssetsMember
919 Customer relationships and other contractual rights Member ifrs-full:CustomerrelatedIntangibleAssetsMember
920 Trademarks Member ifrs-full:BrandNamesMember
921 Goodwill Member ifrs-full:GoodwillMember
922 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
923 Carrying amount [member] Member ifrs-full:CarryingAmountMember
924 Cost Member ifrs-full:GrossCarryingAmountMember
925 Accumulated depreciation Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
926 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
927 Intangible assets and goodwill, beginning balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
928 Effect of inflation adjustment Concept (Monetary) For Period Debit tx:Effectofinflationadjustmentintangibleassets
929 Translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
930 Acquisition of business (note 3) Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
931 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
932 Disposals / Consumptions Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsAndGoodwill
933 Transfers Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill
934 Depreciation charge Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
935 Intangible assets and goodwill, ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
936 2440402 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesDetails
937 Implied Table Table

*

*

 implied:Table
938 Disclosure of interests in other entities [Abstract] Abstract tx:DisclosureofinterestsinotherentitiesAbstract
939 Investments in non-consolidated companies, beginning balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
940 Equity in earnings (losses) of non-consolidated companies Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
941 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
942 Dividends from non-consolidated companies Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedFromInvestmentsAccountedForUsingEquityMethodClassifiedAsInvestingActivities
943 Investments in non-consolidated companies, ending balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
944 2440403 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Schedule of principal in non-consolidated companies) (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesScheduleOfPrincipalInNonConsolidatedCompaniesDetails
945 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
946 Entity by Location [Axis] Axis dei:EntityByLocationAxis
947 Location [Domain] Member dei:LocationDomain
948 Brazil Member country:BR
949 Mexico Member country:MX
950 Non-consolidated companies [axis] Axis tx:NonConsolidatedCompaniesAxis
951 Non-consolidated companies [member] Member tx:NonConsolidatedCompaniesDomain
952 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
953 Techgen S.A. de C.V. Member tx:TechgenS.A.deC.V.Member
954 Other Member tx:OtherMember
955 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
956 Proportion of voting rights held by non-consolidated companies Concept (Percent) For Period tx:ProportionofOwnershipInterestinNonConsolidatedCompanies
957 Investments in non-consolidated companies Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
958 2440404 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Narrative) (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesNarrativeDetails
959 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
960 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
961 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
962 Previdência Usiminas Member tx:PrevidnciaUsiminasMember
963 Legal Entity [Axis] Axis dei:LegalEntityAxis
964 Entity [Domain] Member dei:EntityDomain
965 Tenrium Investments S.a r.l. & Nippon Steel & Sumitomo Metal Corporation Member tx:TenriumInvestmentsS.ar.l.NipponSteelSumitomoMetalCorporationMember
966 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
967 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
968 Ordinary shares Member ifrs-full:OrdinarySharesMember
969 Preferred shares Member ifrs-full:PreferenceSharesMember
970 Non-consolidated companies [axis] Axis tx:NonConsolidatedCompaniesAxis
971 Non-consolidated companies [member] Member tx:NonConsolidatedCompaniesDomain
972 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
973 Techgen S.A. de C.V. Member tx:TechgenS.A.deC.V.Member
974 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
975 Counterparties [member] Member ifrs-full:CounterpartiesMember
976 Ternium Investments S.à r.l., Ternium Argentina S.A. and Prosid Investments S.A. Member tx:TerniumInvestmentsS.r.l.TerniumArgentinaS.A.andProsidInvestmentsS.A.Member
977 Previdência Usiminas Member tx:PrevidnciaUsiminasMember
978 T/T Group Member tx:TTGroupMember
979 Ternium S.A. Member tx:TerniumS.A.Member
980 Tenaris Member tx:TenarisMember
981 Nippon Steel & Sumitomo Metal Corporation Group Member tx:NipponSteelSumitomoMetalCorporationGroupMember
982 Control Group Member tx:ControlGroupMember
983 Caixa de Previdência dos Funcionários Member tx:CaixadePrevidnciadosFuncionriosMember
984 Tecpetrol International S.A. Member tx:TecpetrolInternationalS.A.Member
985 Tenaris Investments S.à.r.l. Member tx:TenarisInvestmentsS..r.l.Member
986 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
987 Number of shares outstanding (shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
988 Percentage of voting equity interests acquired Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
989 Alternating time interval to nominate CEO Concept (xbrli:durationItemType) For Period tx:AlternatingtimeintervaltonominateCEO
990 Number of consecutive terms (terms) Concept (Integer) For Period tx:NumberofConsecutiveTerms
991 Alternating term to nominate CEO (terms) Concept (xbrli:durationItemType) For Period tx:AlternatingtermtonominateCEO
992 Number of members on the board (members) Concept (Integer) For Period tx:Numberofmembersontheboard
993 Number of vice presidents on the board (vice presidents) Concept (Integer) For Period tx:Numberofvicepresidentsontheboard
994 Number of members nominated (members) Concept (Integer) For Period tx:Numberofmembersnominated
995 Number of shares acquired (shares) Concept (Shares) For Period tx:EquityMethodInvestmentsNumberofSharesPurchased
996 Share price (per share) Concept (Share) As Of tx:Shareprice
997 Fair value of investments in associates for which there are quoted market prices Concept (Monetary) As Of Debit ifrs-full:FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished
998 Investments in associates Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociates
999 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1000 Profit from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
1001 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1002 Proportion of ownership interest in associate Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1003 Proportion of ownership interest in associate's power supply Concept (Percent) For Period tx:Proportionofownershipinterestinassociatespowersupply
1004 Number of megawatts (MW) Concept (num:powerItemType) For Period tx:Numberofmegawatts
1005 Subordinated liabilities Concept (Monetary) As Of Credit ifrs-full:SubordinatedLiabilities
1006 2440405 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Value of investment in Usinas) (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesValueOfInvestmentInUsinasDetails
1007 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
1008 Non-consolidated companies [axis] Axis tx:NonConsolidatedCompaniesAxis
1009 Non-consolidated companies [member] Member tx:NonConsolidatedCompaniesDomain
1010 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
1011 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
1012 Investments in non-consolidated companies, beginning balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1013 Share of results Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1014 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1015 Dividends Concept (Monetary) For Period Debit ifrs-full:DividendsReceived
1016 Investments in non-consolidated companies, ending balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1017 2440406 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Investment in Usinas) (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesInvestmentInUsinasDetails
1018 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
1019 Non-consolidated companies [axis] Axis tx:NonConsolidatedCompaniesAxis
1020 Non-consolidated companies [member] Member tx:NonConsolidatedCompaniesDomain
1021 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
1022 Legal Entity [Axis] Axis dei:LegalEntityAxis
1023 Entity [Domain] Member dei:EntityDomain
1024 Ternium S.A. Member tx:TerniumS.A.Member
1025 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
1026 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1027 Proportion of ownership interest in associate Concept (Percent) For Period tx:ProportionofOwnershipInterestinNonConsolidatedCompanies
1028 Investments in non-consolidated companies Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1029 Purchase price allocation Concept (Monetary) For Period Debit tx:PurchasePriceAllocation
1030 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
1031 Impairment loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
1032 2440407 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Summarized balance sheet information) (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesSummarizedBalanceSheetInformationDetails
1033 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
1034 Non-consolidated companies [axis] Axis tx:NonConsolidatedCompaniesAxis
1035 Non-consolidated companies [member] Member tx:NonConsolidatedCompaniesDomain
1036 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
1037 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
1038 Assets Abstract ifrs-full:AssetsAbstract
1039 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1040 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1041 Other current investments Concept (Monetary) As Of Debit ifrs-full:CurrentInvestments
1042 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1043 Total Assets Concept (Monetary) As Of Debit ifrs-full:Assets
1044 Liabilities Abstract ifrs-full:LiabilitiesAbstract
1045 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1046 Non-current borrowings Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1047 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1048 Current borrowings Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
1049 Total Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1050 Non-controlling interest Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1051 Total Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1052 2440408 - Disclosure - INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Summarized income statement information) (Details) Network

*

*

 http://www.ternium.com/role/InvestmentsInNonConsolidatedCompaniesSummarizedIncomeStatementInformationDetails
1053 Disclosure of unconsolidated structured entities [table] Table

*

*

 ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable
1054 Non-consolidated companies [axis] Axis tx:NonConsolidatedCompaniesAxis
1055 Non-consolidated companies [member] Member tx:NonConsolidatedCompaniesDomain
1056 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
1057 Disclosure of unconsolidated structured entities [line items] LineItems ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems
1058 Net sales Concept (Monetary) For Period Credit ifrs-full:Revenue
1059 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
1060 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
1061 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
1062 Other operating income (expenses), net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
1063 Profit (loss) from operating activities Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
1064 Financial expenses, net Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
1065 Equity in earnings of associated companies Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1066 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1067 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1068 Net profit (loss) before non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1069 Non-controlling interest in other subsidiaries Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
1070 Net profit (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
1071 2443402 - Disclosure - RECEIVABLES, NET - NON CURRENT AND CURRENT (Non-current Receivables) (Details) Network

*

*

 http://www.ternium.com/role/ReceivablesNetNonCurrentAndCurrentNonCurrentReceivablesDetails
1072 Implied Table Table

*

*

 implied:Table
1073 Receivables, net [Abstract] Abstract tx:ReceivablesnetAbstract
1074 Receivables with related parties (Notes 26 and 14 (b)) Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesDueFromRelatedParties
1075 Employee advances and loans Concept (Monetary) As Of Debit tx:Noncurrentemployeeadvancesandloans
1076 Advances to suppliers for the purchase of property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:NoncurrentPrepayments
1077 Advances to suppliers for the purchase of property, plant and equipment with related parties (Note 26) Concept (Monetary) As Of Debit tx:Noncurrentprepaymentsrelatedparties
1078 Other receivables (Note 3 (c) (iii)) Concept (Monetary) As Of Debit ifrs-full:AssetRecognisedForExpectedReimbursementContingentLiabilitiesInBusinessCombination
1079 Tax credits Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesFromTaxesOtherThanIncomeTax
1080 Others Concept (Monetary) As Of Debit tx:Othernoncurrentreceivablesnet
1081 Receivables, net – Non-current Concept (Monetary) As Of Debit tx:Noncurrentreceivablesotherthantradereceivablesnet
1082 2443403 - Disclosure - RECEIVABLES, NET - NON CURRENT AND CURRENT (Current receivables) (Details) Network

*

*

 http://www.ternium.com/role/ReceivablesNetNonCurrentAndCurrentCurrentReceivablesDetails
1083 Implied Table Table

*

*

 implied:Table
1084 Receivables, net [Abstract] Abstract tx:ReceivablesnetAbstract
1085 Value added tax Concept (Monetary) As Of Debit ifrs-full:CurrentValueAddedTaxReceivables
1086 Tax credits Concept (Monetary) As Of Debit tx:Currenttaxcredits
1087 Employee advances and loans Concept (Monetary) As Of Debit tx:Currentemployeeadvancesandloans
1088 Advances to suppliers Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
1089 Advances to suppliers with related parties (Note 26) Concept (Monetary) As Of Debit tx:Currentprepaymentsrelatedparty
1090 Expenses paid in advance Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
1091 Government tax refunds on exports Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
1092 Receivables with related parties (Note 26) Concept (Monetary) As Of Debit tx:Receivableswithrelatedpartiescurrent
1093 Others Concept (Monetary) As Of Debit tx:Othercurrentreceivablesnet
1094 Receivables, net – Current Concept (Monetary) As Of Debit tx:Currentreceivablesnet
1095 2446402 - Disclosure - TRADE RECEIVABLES, NET - NON CURRENT AND CURRENT (Details) Network

*

*

 http://www.ternium.com/role/TradeReceivablesNetNonCurrentAndCurrentDetails
1096 Implied Table Table

*

*

 implied:Table
1097 Trade and other receivables [abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
1098 Trade receivables, net – Non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
1099 Current accounts Concept (Monetary) As Of Debit tx:Currentaccounts
1100 Trade receivables with related parties Concept (Monetary) As Of Debit tx:Tradereceivableswithrelatedparties
1101 Allowance for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1102 Trade receivables, net - Current Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1103 2446403 - Disclosure - TRADE RECEIVABLES, NET - NON CURRENT AND CURRENT (Schedule of trade receivables, net) (Details) Network

*

*

 http://www.ternium.com/role/TradeReceivablesNetNonCurrentAndCurrentScheduleOfTradeReceivablesNetDetails
1104 Disclosure of trade receivables [Table] Table

*

*

 tx:DisclosureoftradereceivablesTable
1105 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1106 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1107 Gross carrying amount Member ifrs-full:GrossCarryingAmountMember
1108 Accumulated impairment Member ifrs-full:AccumulatedImpairmentMember
1109 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1110 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1111 Guaranteed Member tx:TradereceivablesguaranteedMember
1112 Not guaranteed Member tx:TradereceivablesnotguaranteedMember
1113 Trade receivables Member ifrs-full:TradeReceivablesMember
1114 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1115 Past due status [member] Member ifrs-full:PastDueStatusMember
1116 Fully performing Member ifrs-full:CurrentMember
1117 Past due Member tx:PastdueMember
1118 Disclosure of trade receivables [Line Items] LineItems tx:DisclosureoftradereceivablesLineItems
1119 Trade receivables, net Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1120 2449402 - Disclosure - INVENTORIES, NET (Details) Network

*

*

 http://www.ternium.com/role/InventoriesNetDetails
1121 Implied Table Table

*

*

 implied:Table
1122 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
1123 Raw materials, materials and spare parts Concept (Monetary) As Of Debit ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies
1124 Goods in process Concept (Monetary) As Of Debit ifrs-full:WorkInProgress
1125 Finished goods Concept (Monetary) As Of Debit ifrs-full:FinishedGoods
1126 Goods in transit Concept (Monetary) As Of Debit ifrs-full:CurrentInventoriesInTransit
1127 Obsolescence allowance (Note 19) Concept (Monetary) As Of Credit tx:Obsolescenceallowance
1128 Inventories, net Concept (Monetary) As Of Debit ifrs-full:Inventories
1129 2452402 - Disclosure - CASH, CASH EQUIVALENTS AND OTHER INVESTMENTS - NON CURRENT AND CURRENT (Other investments) (Details) Network

*

*

 http://www.ternium.com/role/CashCashEquivalentsAndOtherInvestmentsNonCurrentAndCurrentOtherInvestmentsDetails
1130 Implied Table Table

*

*

 implied:Table
1131 Cash, cash equivalents and other investments [Abstract] Abstract tx:CashcashequivalentsandotherinvestmentsAbstract
1132 Investments in companies under cost method Concept (Monetary) As Of Debit tx:Investmentsincompaniesundercostmethod
1133 Investments in debt instruments Concept (Monetary) As Of Debit ifrs-full:DebtInstrumentsHeld
1134 Other investments, net – Non-current Concept (Monetary) As Of Debit tx:Otherinvestmentsnetnoncurrent
1135 2452403 - Disclosure - CASH, CASH EQUIVALENTS AND OTHER INVESTMENTS - NON CURRENT AND CURRENT (Cash and cash equivalents) (Details) Network

*

*

 http://www.ternium.com/role/CashCashEquivalentsAndOtherInvestmentsNonCurrentAndCurrentCashAndCashEquivalentsDetails
1136 Implied Table Table

*

*

 implied:Table
1137 Cash, cash equivalents and other investments [Abstract] Abstract tx:CashcashequivalentsandotherinvestmentsAbstract
1138 Other investments [Abstract] Abstract tx:OtherinvestmentsAbstract
1139 Other deposits with maturity of more than three months Concept (Monetary) As Of Debit tx:Otherdepositsnotclassifiedascashequivalents
1140 Other investments - Current Concept (Monetary) As Of Debit ifrs-full:CurrentInvestments
1141 Cash and cash equivalents [abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
1142 Cash and banks Concept (Monetary) As Of Debit ifrs-full:CashAndBankBalancesAtCentralBanks
1143 Restricted cash Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
1144 Short-term bank deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
1145 Other deposits with maturity of less than three months Concept (Monetary) As Of Debit ifrs-full:OtherCashAndCashEquivalents
1146 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1147 2455402 - Disclosure - ALLOWANCES AND PROVISIONS - NON CURRENT AND CURRENT (Details) Network

*

*

 http://www.ternium.com/role/AllowancesAndProvisionsNonCurrentAndCurrentDetails
1148 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
1149 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
1150 Other provisions [member] Member ifrs-full:OtherProvisionsMember
1151 Legal claims and other matters Member ifrs-full:LegalProceedingsProvisionMember
1152 Asset retirement obligation Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
1153 Allowance for doubtful accounts Member tx:AllowanceforDoubtfulAccountsMember
1154 Obsolescence allowance Member tx:ObsolescenceallowanceMember
1155 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
1156 Non-current provisions [abstract] Abstract ifrs-full:NoncurrentProvisionsAbstract
1157 Non-current provisions, beginning of the year Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
1158 Effect of initial inflation adjustment (Note 4 (cc)) Concept (Monetary) For Period Credit tx:Effectofinitialinflationadjustmentnoncurrent
1159 Translation differences Concept (Monetary) For Period Credit tx:Increasedecreasethroughnetexchangedifferencesotherprovisionsnoncurrent
1160 Acquisition of business (note 3) Concept (Monetary) For Period Credit tx:Acquisitionofbusinessotherprovisionsnoncurrent
1161 Additions Concept (Monetary) For Period Credit tx:Additionalprovisionsotherprovisionsnoncurrent
1162 Reversals Concept (Monetary) For Period Credit tx:Otherreversalsofprovisionsnoncurrent
1163 Uses Concept (Monetary) For Period Debit tx:Provisionusedotherprovisionsnoncurrent
1164 Non-current provisions, end of the year Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
1165 Current provisions [abstract] Abstract ifrs-full:CurrentProvisionsAbstract
1166 Current provisions, beginning of the year Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
1167 Effect of initial inflation adjustment (Note 4 (cc)) Concept (Monetary) For Period Credit tx:Effectofinitialinflationadjustmentcurrent
1168 Translation differences Concept (Monetary) For Period Credit tx:Increasedecreasethroughnetexchangedifferencesotherprovisionscurrent
1169 Acquisition of business (note 3) Concept (Monetary) For Period Credit tx:Acquisitionofbusinessotherprovisionscurrent
1170 Additions Concept (Monetary) For Period Credit tx:Additionalprovisionsotherprovisionscurrent
1171 Reversals Concept (Monetary) For Period Credit tx:Otherreversalsofprovisionscurrent
1172 Uses Concept (Monetary) For Period Debit tx:Provisionusedotherprovisionscurrent
1173 Current provisions, end of the year Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
1174 2458402 - Disclosure - DEFERRED INCOME TAX (Changes in deferred income tax) (Details) Network

*

*

 http://www.ternium.com/role/DeferredIncomeTaxChangesInDeferredIncomeTaxDetails
1175 Implied Table Table

*

*

 implied:Table
1176 Deferred income tax [Abstract] Abstract tx:DeferredincometaxAbstract
1177 At the beginning of the year Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1178 Acquisition of business (Note 3) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset
1179 Translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
1180 Effect of changes in tax law Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
1181 Effect of initial inflation adjustment Concept (Monetary) For Period Debit tx:Deferredtaxexpenseincomeeffectofinitialinflationadjustment
1182 Credits (Charges) directly to other comprehensive income Concept (Monetary) For Period ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1183 Deferred tax (charge) credit Concept (Monetary) For Period Debit tx:DeferredTaxExpenseIncomeAndAdjustmentsForDeferredTaxOfPriorPeriods
1184 At the end of the year Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1185 2458403 - Disclosure - DEFERRED INCOME TAX (Changes in deferred tax assets and liabilities) (Details) Network

*

*

 http://www.ternium.com/role/DeferredIncomeTaxChangesInDeferredTaxAssetsAndLiabilitiesDetails
1186 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1187 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1188 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1189 PP&E Member tx:PropertyPlantEquipmentMember
1190 Inventories Member tx:InventoryMember
1191 Intangible assets Member ifrs-full:IntangibleAssetsMaterialToEntityMember
1192 Other Member tx:OtherTemporaryDifferencesDeferredTaxLiabilitiesMember
1193 Deferred tax liabilities Member tx:DeferredtaxliabilitiesMember
1194 Provisions Member tx:ProvisionMember
1195 Trade receivables Member ifrs-full:TradeReceivablesMember
1196 Tax losses Member ifrs-full:UnusedTaxLossesMember
1197 Other Member tx:OtherTemporaryDifferencesDeferredTaxAssetsMember
1198 Deferred tax assets Member tx:DeferredtaxassetsMember
1199 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1200 Deferred tax liability, beginning balance Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1201 Deferred tax assets, beginning balance Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1202 Translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
1203 Effect of initial inflation adjustment Concept (Monetary) For Period Debit tx:Deferredtaxexpenseincomeeffectofinitialinflationadjustment
1204 Acquisition of business (Note 3) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset
1205 Effect of changes in tax law Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
1206 Deferred tax (charge) credit Concept (Monetary) For Period Debit tx:DeferredTaxExpenseIncomeAndAdjustmentsForDeferredTaxOfPriorPeriods
1207 Deferred tax liability, ending balance Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1208 Deferred tax assets, ending balance Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1209 2458404 - Disclosure - DEFERRED INCOME TAX (Schedule of deferred tax assets and liabilities) (Details) Network

*

*

 http://www.ternium.com/role/DeferredIncomeTaxScheduleOfDeferredTaxAssetsAndLiabilitiesDetails
1210 Implied Table Table

*

*

 implied:Table
1211 Deferred income tax [Abstract] Abstract tx:DeferredincometaxAbstract
1212 Deferred tax assets to be recovered after more than 12 months Concept (Monetary) As Of Debit tx:Deferredtaxassetsnoncurrent
1213 Deferred tax assets to be recovered within 12 months Concept (Monetary) As Of Debit tx:Deferredtaxassetscurrent
1214 Deferred tax liabilities to be settled after more than 12 months Concept (Monetary) As Of Credit tx:Deferredtaxliabilitiesnoncurrent
1215 Deferred tax liabilities to be settled within 12 months Concept (Monetary) As Of Credit tx:Deferredtaxliabilitiescurrent
1216 Deferred tax liability (asset) Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1217 2461402 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT (Other liabilities - Non-current) (Details) Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrentOtherLiabilitiesNonCurrentDetails
1218 Implied Table Table

*

*

 implied:Table
1219 Disclosure of other liabilities [Abstract] Abstract tx:DisclosureofotherliabilitiesAbstract
1220 Post-employment benefits Concept (Monetary) As Of Credit tx:Postemploymentbenefitliabilitynoncurrent
1221 Other employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
1222 Asset retirement obligation (note 19) Concept (Monetary) As Of Credit tx:AssetRetirementObligationNoncurrent
1223 Other Concept (Monetary) As Of Credit tx:Noncurrentmiscellaneousotherliabilities
1224 Other liabilities – Non-current Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
1225 2461403 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT (Schedule of other liabilities in statement of financial position) (Details) Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrentScheduleOfOtherLiabilitiesInStatementOfFinancialPositionDetails
1226 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1227 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1228 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1229 Present value of defined benefit obligation Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1230 Retirement plan funding status [Axis] Axis tx:RetirementPlanFundingStatus1Axis
1231 Retirement plan funding status [Domain] Member tx:RetirementPlanFundingStatus1Domain
1232 Unfunded Plan Member tx:UnfundedPlan1Member
1233 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1234 Net defined benefit liability (asset) - beginning balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1235 Transfers, new participants and funding of the plan Concept (Monetary) For Period Debit tx:Transfersnewparticipantsandfundingoftheplannetdefinedbenefitliabilityasset
1236 Total expense Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1237 Remeasurements Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
1238 Effect of changes in demographic assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
1239 Effect of changes in financial assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1240 Effect of experience adjustments Concept (Monetary) For Period Debit tx:Actuarialgainslossesarisingfromchangesinexperienceadjustmentsnetdefinedbenefitliabilityasset
1241 Translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1242 Contributions paid Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
1243 Net defined benefit liability (asset) - ending balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1244 2461404 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT (Schedule of amounts recognized in income statement) (Details) Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrentScheduleOfAmountsRecognizedInIncomeStatementDetails
1245 Implied Table Table

*

*

 implied:Table
1246 Disclosure of other liabilities [Abstract] Abstract tx:DisclosureofotherliabilitiesAbstract
1247 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1248 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1249 Total included in labor costs Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1250 2461405 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT (Actuarial assumptions of defined benefit obligation) (Details) Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrentActuarialAssumptionsOfDefinedBenefitObligationDetails
1251 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
1252 Impact on Defined Benefit Obligation [Axis] Axis tx:ImpactonDefinedBenefitObligationAxis
1253 Impact on Defined Benefit Obligation [Domain] Member tx:ImpactonDefinedBenefitObligationDomain
1254 Increase in assumption Member tx:IncreaseinAssumptionMember
1255 Decrease in assumption Member tx:DecreaseinAssumptionMember
1256 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1257 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1258 Argentina Member country:AR
1259 Mexico Member country:MX
1260 Range [axis] Axis ifrs-full:RangeAxis
1261 Ranges [member] Member ifrs-full:RangesMember
1262 Bottom of range Member ifrs-full:BottomOfRangeMember
1263 Top of range Member ifrs-full:TopOfRangeMember
1264 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1265 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
1266 Compensation growth rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
1267 Pension growth rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfPensionIncreases
1268 Life expectancy (period) Concept (xbrli:durationItemType) For Period tx:Definedbenefitobligationlifeexpectancy
1269 Life expectancy Concept (Percent) As Of tx:Definedbenefitobligationincreasedecreaseinlifeexpectancy
1270 Estimate of contributions expected to be paid to plan for next five years Concept (Monetary) For Period Credit ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1271 2461406 - Disclosure - OTHER LIABILITIES - NON CURRENT AND CURRENT (Other liabilities - Current) (Details) Network

*

*

 http://www.ternium.com/role/OtherLiabilitiesNonCurrentAndCurrentOtherLiabilitiesCurrentDetails
1272 Implied Table Table

*

*

 implied:Table
1273 Disclosure of other liabilities [Abstract] Abstract tx:DisclosureofotherliabilitiesAbstract
1274 Payroll and social security payable Concept (Monetary) As Of Credit ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1275 VAT liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentValueAddedTaxPayables
1276 Other tax liabilities Concept (Monetary) As Of Credit tx:Othertaxliabilitiescurrent
1277 Termination benefits Concept (Monetary) As Of Credit tx:Terminationbenefitscurrent
1278 Related Parties (Note 26) Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
1279 Asset retirement obligation (Note 19) Concept (Monetary) As Of Credit tx:AssetRetirementObligationCurrent1
1280 Others Concept (Monetary) As Of Credit tx:Currentmiscellaneousotherliabilities
1281 Other liabilities – Current Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
1282 2464402 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Net fair value) (Details) Network

*

*

 http://www.ternium.com/role/DerivativeFinancialInstrumentsNetFairValueDetails
1283 Disclosure of detailed information about hedging instruments [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsTable
1284 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1285 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1286 Fair value hedges Member ifrs-full:FairValueHedgesMember
1287 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
1288 Hedging instruments [member] Member ifrs-full:HedgingInstrumentsMember
1289 Interest rate swap contracts Member ifrs-full:InterestRateSwapContractMember
1290 Foreign exchange contracts Member tx:ForeignexchangecontractMember
1291 Disclosure of detailed information about hedging instruments [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems
1292 Derivative financial assets for hedging Concept (Monetary) As Of Debit ifrs-full:HedgingInstrumentAssets
1293 Derivative financial liabilities for hedging Concept (Monetary) As Of Credit ifrs-full:HedgingInstrumentLiabilities
1294 2464403 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Narrative) (Details) Network

*

*

 http://www.ternium.com/role/DerivativeFinancialInstrumentsNarrativeDetails
1295 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1296 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1297 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1298 Non-deliverable forward contract Member tx:NondeliverableforwardcontractMember
1299 Forward contract Member ifrs-full:ForwardContractMember
1300 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
1301 Hedging instruments [member] Member ifrs-full:HedgingInstrumentsMember
1302 Interest rate swap contracts Member ifrs-full:InterestRateSwapContractMember
1303 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1304 Counterparties [member] Member ifrs-full:CounterpartiesMember
1305 Tenigal S. de R.L. de C.V. Member tx:TenigalS.deR.L.deC.V.Member
1306 Prosid Investments S.A. Member tx:ProsidInvestmentsS.A.Member
1307 Ternium Colombia S.A.S (formerly Ferrasa S.A.S) Member tx:TerniumColombiaS.A.SformerlyFerrasaS.A.SMember
1308 Ternium Mexico S.A. de C.V. Member tx:TerniumMexicoS.A.deC.V.Member
1309 Ternium Investments S.à.r.l. Member tx:TerniumInvestmentsS..r.l.Member
1310 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1311 Notional amount Concept (Monetary) As Of invest:DerivativeNotionalAmount
1312 Derivative, average fixed interest rate Concept (Percent) As Of ifrs-full:AverageRateOfHedgingInstrument
1313 Reserve of cash flow hedges, net of tax Concept (Monetary) As Of Credit tx:Reserveofcashflowhedgesnetoftax
1314 Other comprehensive income that will be reclassified to profit or loss, before tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTax
1315 2464404 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Changes in fair value) (Details) Network

*

*

 http://www.ternium.com/role/DerivativeFinancialInstrumentsChangesInFairValueDetails
1316 Disclosure of analysis of other comprehensive income by item [table] Table

*

*

 ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable
1317 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1318 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1319 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1320 Disclosure of analysis of other comprehensive income by item [line items] LineItems ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems
1321 Other comprehensive income, before tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeBeforeTax
1322 Accumulated other comprehensive income, tax Concept (Monetary) As Of Debit tx:AccumulatedOtherComprehensiveIncomeTax
1323 Other comprehensive income, net of tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeNetofTax
1324 Gains (losses) on cash flow hedges, before tax Concept (Monetary) For Period Credit tx:OtherComprehensiveIncomeLossIncreaseDecreasebeforeTax
1325 Gains (losses) on cash flow hedges, tax Concept (Monetary) For Period Debit tx:OtherComprehensiveIncomeLossIncreaseDecreaseTax
1326 Gains (losses) on cash flow hedges, net of tax Concept (Monetary) For Period Credit tx:OtherComprehensiveIncomeLossIncreaseDecreaseNetofTax
1327 Reclassification adjustments on cash flow hedges, before tax Concept (Monetary) For Period Debit tx:ReclassificationfromAOCIbeforeTax
1328 Reclassification adjustments on exchange differences on translation, tax Concept (Monetary) For Period Credit tx:ReclassificationfromAOCITax
1329 Reclassification adjustments on cash flow hedges, net of tax Concept (Monetary) For Period Debit tx:ReclassificationfromAOCINetofTax
1330 Other comprehensive income, before tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeBeforeTax
1331 Accumulated other comprehensive income, tax Concept (Monetary) As Of Debit tx:AccumulatedOtherComprehensiveIncomeTax
1332 Other comprehensive income, net of tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeNetofTax
1333 2464405 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Exchange rate derivative contract) (Details) Network

*

*

 http://www.ternium.com/role/DerivativeFinancialInstrumentsExchangeRateDerivativeContractDetails
1334 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1335 Position [Axis] Axis tx:Position1Axis
1336 Position [Domain] Member tx:Position1Domain
1337 Long Member tx:Long1Member
1338 Short Member tx:Short1Member
1339 Currency [Axis] Axis tx:Currency1Axis
1340 Currency [Domain] Member tx:CurrencyDomain
1341 Euro Member Countries, Euro Member currency:EUR
1342 Brazil, Brazil Real Member currency:BRL
1343 Colombia, Pesos Member currency:COP
1344 Argentina, Pesos Member currency:ARS
1345 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1346 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1347 Forward contract Member ifrs-full:ForwardContractMember
1348 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1349 Notional amount Concept (Monetary) As Of invest:DerivativeNotionalAmount
1350 Financial assets, at fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1351 Financial liabilities, at fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1352 2467402 - Disclosure - FINANCE LEASES - Narrative (Details) Network

*

*

 http://www.ternium.com/role/FinanceLeasesNarrativeDetails
1353 Disclosure of recognised finance lease as assets by lessee [table] Table

*

*

 ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable
1354 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1355 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1356 PP&E Member tx:PropertyPlantEquipmentMember
1357 Disclosure of recognised finance lease as assets by lessee [line items] LineItems ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems
1358 Current finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
1359 Non-current finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
1360 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
1361 Recognised finance lease as assets Concept (Monetary) As Of Debit ifrs-full:RecognisedFinanceLeaseAsAssets
1362 Finance lease term Concept (xbrli:durationItemType) For Period tx:Financeleaseterm
1363 Finance lease amortisation period Concept (xbrli:durationItemType) For Period tx:Financeleaseamortisationperiod
1364 2467403 - Disclosure - FINANCE LEASES (Details) Network

*

*

 http://www.ternium.com/role/FinanceLeasesDetails
1365 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1366 Maturity [axis] Axis ifrs-full:MaturityAxis
1367 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1368 Within one year Member ifrs-full:NotLaterThanOneYearMember
1369 Later than one year but not later than five years Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1370 Later than five years Member ifrs-full:LaterThanFiveYearsMember
1371 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1372 Minimum lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayable
1373 Future finance charges Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
1374 Total Financial lease liabilities Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
1375 Total minimum lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1376 2470402 - Disclosure - BORROWINGS (Current and non-current information on borrowings) (Details) Network

*

*

 http://www.ternium.com/role/BorrowingsCurrentAndNonCurrentInformationOnBorrowingsDetails
1377 Implied Table Table

*

*

 implied:Table
1378 Borrowings [abstract] Abstract ifrs-full:BorrowingsAbstract
1379 Bank borrowings, undiscounted cash flows, non-current Concept (Monetary) As Of Credit tx:Bankborrowingsundiscountedcashflowsnoncurrent
1380 Less: debt issue costs, non-current Concept (Monetary) As Of Credit tx:Debtissuancecostsnoncurrent
1381 Non-current borrowings Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1382 Bank borrowings, undiscounted cash flows, current Concept (Monetary) As Of Credit tx:Bankborrowingsundiscountedcashflowscurrent
1383 Less: debt issue costs, current Concept (Monetary) As Of Credit tx:Debtissuancecostscurrent
1384 Current borrowings Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
1385 Total Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1386 2470403 - Disclosure - BORROWINGS (Maturity of borrowings) (Details) Network

*

*

 http://www.ternium.com/role/BorrowingsMaturityOfBorrowingsDetails
1387 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1388 Maturity [axis] Axis ifrs-full:MaturityAxis
1389 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1390 2019 Member ifrs-full:NotLaterThanOneYearMember
1391 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1392 2021 and thereafter Member tx:LaterthantwoyearsMember
1393 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1394 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1395 Fixed Rate Member ifrs-full:FixedInterestRateMember
1396 Floating Rate Member ifrs-full:FloatingInterestRateMember
1397 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1398 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1399 2470404 - Disclosure - BORROWINGS (Weighted-average interest rate) (Details) Network

*

*

 http://www.ternium.com/role/BorrowingsWeightedAverageInterestRateDetails
1400 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1401 Range [axis] Axis ifrs-full:RangeAxis
1402 Ranges [member] Member ifrs-full:RangesMember
1403 Weighted average Member ifrs-full:WeightedAverageMember
1404 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1405 Borrowings, interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1406 2470405 - Disclosure - BORROWINGS (Borrowings by currency) (Details) Network

*

*

 http://www.ternium.com/role/BorrowingsBorrowingsByCurrencyDetails
1407 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1408 Currency [Axis] Axis tx:Currency1Axis
1409 Currency [Domain] Member tx:CurrencyDomain
1410 United States of America, Dollars Member currency:USD
1411 Argentina, Pesos Member currency:ARS
1412 Colombia, Pesos Member currency:COP
1413 Guatemala, Quetzales Member currency:GTQ
1414 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1415 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1416 Floating Rate Member ifrs-full:FloatingInterestRateMember
1417 Fixed Rate Member ifrs-full:FixedInterestRateMember
1418 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1419 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1420 2470406 - Disclosure - BORROWINGS (Significant borrowings) (Details) Network

*

*

 http://www.ternium.com/role/BorrowingsSignificantBorrowingsDetails
1421 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1422 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1423 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1424 Ternium Mexico Syndicated Loan Due November 2018 Member tx:TerniumMexicoSyndicatedLoanDueNovember2018Member
1425 Tenigal Syndicated Loan Due July 2022 Member tx:TenigalSyndicatedLoanDueJuly2022Member
1426 Ternium Investments S.à r.l Syndicated Loan Due September 2022 Member tx:TerniumInvestmentsS.r.lSyndicatedLoanDueSeptember2022Member
1427 Ternium Mexico Syndicated Loan Due June 2023 Member tx:TerniumMexicoSyndicatedLoanDueJune2023Member
1428 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1429 Original principal amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1430 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1431 Undrawn borrowing facilities Concept (Monetary) As Of Credit ifrs-full:UndrawnBorrowingFacilities
1432 2473402 - Disclosure - CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Tender offer litigation) (Details) Network

*

*

 http://www.ternium.com/role/ContingenciesCommitmentsAndRestrictionsOnDistributionOfProfitsTenderOfferLitigationDetails
1433 Disclosure of contingent liabilities [table] Table

*

*

 ifrs-full:DisclosureOfContingentLiabilitiesTable
1434 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1435 Counterparties [member] Member ifrs-full:CounterpartiesMember
1436 Ternium Investments S.à r.l. Member tx:TerniumInvestmentsS.r.l.Member
1437 Ternium Argentina S.A. Member tx:TerniumArgentinaS.A.formerlySiderarS.A.I.C.Member
1438 Litigation Status [Axis] Axis tx:LitigationStatus1Axis
1439 Litigation Status [Domain] Member tx:LitigationStatus1Domain
1440 Pending Litigation Member tx:PendingLitigation1Member
1441 Litigation Case [Axis] Axis tx:LitigationCase1Axis
1442 Litigation Case [Domain] Member tx:LitigationCaseDomain
1443 Comphania Siderúrgica Nacional vs. Ternium Investments S.à . r.l., Siderar & Confab Industrial S.A. Member tx:ComphaniaSiderrgicaNacionalvs.TerniumInvestmentsS..r.l.SiderarConfabIndustrialS.A.Member
1444 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1445 Tender offer, percent Concept (Percent) For Period tx:Tenderofferpercent
1446 Tender offer, price per share Concept (Share) For Period tx:Tenderofferpricepershare
1447 Tender offer, number of shares Concept (Shares) For Period tx:Tenderoffernumberofshares
1448 Proportion of shares in tender offer Concept (Percent) For Period tx:Proportionofsharesintenderoffer
1449 2473403 - Disclosure - CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Shareholder claims, Mexican income tax adjustment & Argentine tax claim) (Details) Network

*

*

 http://www.ternium.com/role/ContingenciesCommitmentsAndRestrictionsOnDistributionOfProfitsShareholderClaimsMexicanIncomeTaxAdjustmentArgentineTaxClaimDetails
1450 Disclosure of contingent liabilities [table] Table

*

*

 ifrs-full:DisclosureOfContingentLiabilitiesTable
1451 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
1452 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
1453 Tax contingent liability Member ifrs-full:TaxContingentLiabilityMember
1454 Income Tax Authority [Axis] Axis tx:IncomeTaxAuthority1Axis
1455 Income Tax Authority [Domain] Member tx:IncomeTaxAuthority1Domain
1456 Domestic Tax Authority Member tx:DomesticTaxAuthorityMember
1457 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1458 Counterparties [member] Member ifrs-full:CounterpartiesMember
1459 Comissão de Valores Mobiliários Member tx:ComissodeValoresMobiliriosMember
1460 Mexican Tax Authority Member tx:MexicanTaxAuthority1Member
1461 Argentina Tax Authority Member tx:ArgentinaTaxAuthorityMember
1462 Ternium Argentina S.A. Member tx:TerniumArgentinaS.A.formerlySiderarS.A.I.C.Member
1463 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
1464 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
1465 USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. Member tx:USINASSIDERGICASDEMINASGERAISS.A.Member
1466 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1467 Number of shares exceeding threshold for tender offer requirement Concept (Shares) For Period tx:Numberofsharesexceedingthresholdfortenderofferrequirement
1468 Increase in capital Concept (Monetary) For Period Credit tx:IncreaseDecreaseinCapital
1469 Tax contingent liability Concept (Monetary) For Period Credit tx:TaxContingentLiability
1470 Additional tax contingent liability Concept (Monetary) For Period Credit tx:AdditionalTaxContingentLiability
1471 Liability from settlement with taxing authority Concept (Monetary) As Of Credit tx:IncomeTaxExaminationLiabilityRefundAdjustmentfromSettlementwithTaxingAuthority
1472 Liability from settlement with taxing authority including interest Concept (Monetary) As Of Credit tx:IncomeTaxExaminationLiabilityRefundAdjustmentfromSettlementwithTaxingAuthorityIncludingInterest
1473 2473404 - Disclosure - CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Commitments) (Details) Network

*

*

 http://www.ternium.com/role/ContingenciesCommitmentsAndRestrictionsOnDistributionOfProfitsCommitmentsDetails
1474 Disclosure of contingent liabilities [table] Table

*

*

 ifrs-full:DisclosureOfContingentLiabilitiesTable
1475 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1476 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1477 Ternium Mexico Syndicated Loan Due June 2023 Member tx:TerniumMexicoSyndicatedLoanDueJune2023Member
1478 Scenario [Axis] Axis tx:Scenario1Axis
1479 Scenario [Domain] Member tx:ScenarioDomain
1480 Scenario one Member tx:NumberOneMember
1481 Scenario two Member tx:NumberTwoMember
1482 Forecast Member tx:ForecastMember
1483 Range [axis] Axis ifrs-full:RangeAxis
1484 Ranges [member] Member ifrs-full:RangesMember
1485 Bottom of range Member ifrs-full:BottomOfRangeMember
1486 Top of range Member ifrs-full:TopOfRangeMember
1487 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1488 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1489 Techgen S.A. de C.V. Member tx:TechgenS.A.deC.V.Member
1490 Legal Entity [Axis] Axis dei:LegalEntityAxis
1491 Entity [Domain] Member dei:EntityDomain
1492 Ternium S.A. Member tx:TerniumS.A.Member
1493 Techgen S.A. de C.V. Member tx:TechgenS.A.deC.V.Member
1494 Category of Item Purchased [Axis] Axis tx:CategoryofItemPurchasedAxis
1495 Category of Item Purchased [Domain] Member tx:CategoryofItemPurchasedDomain
1496 Iron Ore, Pellets and Iron Ore Fines Member tx:IronOrePelletsandIronOreFinesMember
1497 Natural Gas Member tx:NaturalGasMember
1498 Freight Services Member tx:FreightServicesMember
1499 Debt Instrument [Axis] Axis tx:DebtInstrument1Axis
1500 Debt Instrument [Domain] Member tx:DebtInstrumentDomain
1501 Syndicated Loan Member tx:SyndicatedLoanMember
1502 Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Axis tx:UnrecordedUnconditionalPurchaseObligationbyCategoryofItemPurchasedAxis
1503 Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] [Domain] Member tx:UnrecordedUnconditionalPurchaseObligationbyCategoryofItemPurchasedAxisDomain
1504 Public utilities inventory, fuel Member tx:PublicUtilitiesInventoryFuel1Member
1505 Capital Addition Purchase Commitments Member tx:CapitalAdditionPurchaseCommitmentsMember
1506 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1507 Counterparties [member] Member ifrs-full:CounterpartiesMember
1508 Ternium Argentina S.A. Member tx:TerniumArgentinaS.A.formerlySiderarS.A.I.C.Member
1509 Tenaris Member tx:TenarisMember
1510 Air Liquide Argentina S.A. Member tx:AirLiquideArgentinaS.A.Member
1511 Techgen S.A. de C.V. Member tx:TechgenS.A.deC.V.Member
1512 Ternium Mexico S.A. de C.V. Member tx:TerniumMexicoS.A.deC.V.Member
1513 Iberdrola Energia Monterey, S.A. de C.V. Member tx:IberdrolaEnergiaMontereyS.A.deC.V.Member
1514 Tractebel Energia de Monterrey, S. de R.L. de C.V. Member tx:TractebelEnergiadeMonterreyS.deR.L.deC.V.Member
1515 Ferrocarril Mexicano, S. A. de C. V. Member tx:FerrocarrilMexicanoS.A.deC.V.Member
1516 Gas Industrial de Monterrey, S.A. de C.V. Member tx:GasIndustrialdeMonterreyS.A.deC.V.Member
1517 Kinder Morgan Gas Member tx:KinderMorganGasMember
1518 Ternium Brasil Ltda. Member tx:TerniumBrasilLtda.Member
1519 Vale S.A. Member tx:ValeS.A.Member
1520 GE Global Parts and Products GMBH, General Electric International Inc. and Alstom Energia Térmica e Indústria Ltda. Member tx:GEGlobalPartsandProductsGMBHGeneralElectricInternationalInc.andAlstomEnergiaTrmicaeIndstriaLtda.Member
1521 Primetals Technologies Brazil Ltda. Member tx:PrimetalsTechnologiesBrazilLtda.Member
1522 Air Liquide Brasil Ltda., AirSteel Ltda., White Martins Gases Industriais Ltda., White Martins Steel Ltda. and ThyssenKrupp MinEnergy GmbH Member tx:AirLiquideBrasilLtda.AirSteelLtda.WhiteMartinsGasesIndustriaisLtda.WhiteMartinsSteelLtda.andThyssenKruppMinEnergyGmbHMember
1523 Companhia Distribuidora de Gás do Rio de Janeiro Member tx:CompanhiaDistribuidoradeGsdoRiodeJaneiroMember
1524 Stahllog Solucao Logisticas Ltda. Member tx:StahllogSolucaoLogisticasLtda.Member
1525 Guarantor Obligations, Nature [Axis] Axis tx:GuarantorObligationsNatureAxis
1526 Guarantor Obligations, Nature [Domain] Member tx:GuarantorObligationsNatureDomain
1527 Financial Guarantee Member tx:FinancialGuarantee1Member
1528 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1529 Long-term purchase commitment, minimum percentage of volume required Concept (Percent) For Period tx:LongtermPurchaseCommitmentMinimumPercentageofVolumeRequired
1530 Long-term purchase commitment, amount Concept (Monetary) For Period Credit tx:LongtermPurchaseCommitmentAmount
1531 Long-term purchase commitment, percentage of penalty Concept (Percent) For Period tx:LongtermPurchaseCommitmentPercentageofPenalty
1532 Long-term purchase commitment, percentage of total volume actually operated Concept (Percent) For Period tx:LongtermPurchaseCommitmentPercentageofTotalVolumeActuallyOperated
1533 Minimum mass required (tons per hour) Concept (num:massItemType) For Period tx:LongtermPurchaseCommitmentMinimumMassRequired1
1534 Long-term contract for purchase of electric power, term Concept (xbrli:durationItemType) For Period tx:LongtermContractforPurchaseofElectricPowerTerm
1535 Long-term contract for purchase of electric power, electrical demand Concept (num:powerItemType) For Period tx:LongtermContractforPurchaseofElectricPowerElectricalDemand
1536 Percentage of electricity needs supplied Concept (Percent) For Period tx:Percentageofelectricityneedssupplied
1537 Number of electrical plants Concept (Integer) For Period tx:Numberofelectricalplants
1538 Number of electrical plants terminated Concept (Integer) For Period tx:Numberofelectricalplantsterminated
1539 Long-term contract for purchase of electric power, credit (per megawatt) Concept (Monetary) For Period Debit tx:LongtermContractforPurchaseofElectricPowerCreditPerMegawatt
1540 Long-term contract for purchase of electric power, credit Concept (Monetary) For Period Debit tx:LongtermContractforPurchaseofElectricPowerCredit
1541 Long-term contract for purchase of electric power, discount Concept (Monetary) For Period Debit tx:LongtermContractforPurchaseofElectricPowerDiscount
1542 Short-term contract for purchase of electric power, length that rates are similar to previous term Concept (xbrli:durationItemType) For Period tx:ShorttermContractforPurchaseofElectricPowerLengthThatRatesAreSimilarToPreviousTerm
1543 Short-term contract for purchase of electric power, percentage discount on contract Concept (Percent) For Period tx:ShorttermContractforPurchaseofElectricPowerPercentageDiscountOnContract
1544 Long-term contract for purchase of electric power, contracted amount Concept (Monetary) For Period Debit tx:LongtermContractforPurchaseofElectricPowerContractedAmount
1545 Long-term purchase commitment, period Concept (xbrli:durationItemType) For Period tx:LongtermPurchaseCommitmentPeriod1
1546 Long-term purchase commitment, period to make investments to improve loading and unloading of gondolas Concept (xbrli:durationItemType) For Period tx:LongtermPurchaseCommitmentPeriodToMakeInvestmentstoImproveLoadingandUnloadingofGondolas
1547 Long-term purchase commitment, minimum quantity required (per month) Concept (num:massItemType) For Period tx:LongtermPurchaseCommitmentMinimumQuantityRequired
1548 Long-term purchase commitment, quantity required Concept (num:massItemType) For Period tx:LongtermPurchaseCommitmentQuantityRequired
1549 Guarantor obligations, borrowing outstanding Concept (Monetary) As Of Credit tx:GuarantorObligationsBorrowingOutstanding
1550 Guarantor obligations, outstanding Concept (Monetary) As Of Credit tx:GuarantorObligationsOutstanding
1551 Guarantor obligations, percentage of amount payable if counterparty terminates agreement Concept (Percent) For Period tx:GuarantorObligationsPercentageofAmountPayableifCounterpartyTerminatesAgreement
1552 Long-term contract for purchase of natural gas transportation, capacity Concept (num:energyItemType) For Period tx:Longtermcontractforpurchaseofnaturalgastransportationcapacity
1553 Threshold percentage, right to purchase energy Concept (Percent) For Period tx:ThresholdPercentageRighttoPurchaseEnergy
1554 Guarantor obligations, current carrying value Concept (Monetary) As Of Credit tx:GuarantorObligationsCurrentCarryingValue
1555 Original principal amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1556 Borrowings, net senior leverage ratio Concept (Percent) As Of tx:Borrowingsnetseniorleverageratio
1557 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1558 Guarantor obligations, percentage Concept (Percent) For Period tx:GuarantorObligationsPercentage
1559 Borrowings outstanding Concept (Monetary) As Of Credit tx:Borrowingsoutstanding
1560 Number of distributors Concept (Integer) For Period tx:NumberofDistributors
1561 Long-term purchase commitment, total purchased volume Concept (num:massItemType) For Period tx:LongtermPurchaseCommitmentTotalPurchasedVolume
1562 Long-term purchase commitment, period for maintenance services of turbines Concept (xbrli:durationItemType) For Period tx:LongtermPurchaseCommitmentPeriodForMaintenanceServicesofTurbines
1563 Long-term purchase commitment, volume Concept (num:volumeItemType) For Period tx:LongtermPurchaseCommitmentVolume
1564 Dividend payables Concept (Monetary) As Of Credit ifrs-full:DividendPayables
1565 2473405 - Disclosure - CONTINGENCIES, COMMITMENTS AND RESTRICTIONS ON THE DISTRIBUTION OF PROFITS (Shareholders' equity under Luxembourg law) (Details) Network

*

*

 http://www.ternium.com/role/ContingenciesCommitmentsAndRestrictionsOnDistributionOfProfitsShareholdersEquityUnderLuxembourgLawDetails
1566 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1567 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1568 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1569 Luxembourg Member country:LU
1570 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1571 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
1572 Legal reserve Concept (Monetary) As Of Credit ifrs-full:StatutoryReserve
1573 Non distributable reserves Concept (Monetary) As Of Credit tx:Undistributedreserve
1574 Reserve for own shares Concept (Monetary) As Of Credit ifrs-full:CapitalRedemptionReserve
1575 Accumulated profit at January 1, 2018 Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
1576 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1577 Total Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1578 2476402 - Disclosure - RELATED PARTY TRANSACTIONS (Narrative) (Details) Network

*

*

 http://www.ternium.com/role/RelatedPartyTransactionsNarrativeDetails
1579 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1580 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1581 Counterparties [member] Member ifrs-full:CounterpartiesMember
1582 Techint Holdings S.à.r.l Member tx:TechintHoldingsS..r.lMember
1583 Tenaris Investments S.à.r.l. Member tx:TenarisInvestmentsS..r.l.Member
1584 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1585 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1586 Entities with joint control or significant influence over entity Member ifrs-full:JointControlOrSignificantInfluenceMember
1587 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1588 Percentage of Company shares owned Concept (Shares) As Of tx:PercentageofsharesownedintheCompany
1589 Key management personnel compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1590 Key management personnel compensation, shares Concept (Shares) For Period tx:Keymanagementpersonnelcompensationshares
1591 Key management personnel compensation, share-based payment Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1592 2476403 - Disclosure - RELATED PARTY TRANSACTIONS (Transactions between related parties) (Details) Network

*

*

 http://www.ternium.com/role/RelatedPartyTransactionsTransactionsBetweenRelatedPartiesDetails
1593 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1594 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1595 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1596 Non-consolidated parties Member ifrs-full:AssociatesMember
1597 Other related parties Member ifrs-full:OtherRelatedPartiesMember
1598 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1599 Related party transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
1600 Revenue from sale of goods, related party transactions Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
1601 Revenue from rendering of services, related party transactions Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
1602 Revenue from sale of goods and services, related party transactions Concept (Monetary) For Period Credit tx:Revenuefromsaleofgoodsandservicesrelatedpartytransactions
1603 Purchases of goods, related party transactions Concept (Monetary) For Period Debit ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
1604 Services received, related party transactions Concept (Monetary) For Period Debit ifrs-full:ServicesReceivedRelatedPartyTransactions
1605 Purchases of goods and services, related party transactions Concept (Monetary) For Period Debit tx:Purchasesofgoodsandservicesrelatedpartytransactions
1606 Income, related party transactions Concept (Monetary) For Period Credit tx:Profitlossrelatedpartytransactions
1607 Dividends received Concept (Monetary) For Period Debit ifrs-full:DividendsReceived
1608 Other income (expense), related party transactions Concept (Monetary) For Period Credit tx:Otheroperatingincomeexpenserelatedpartytransactions
1609 Outstanding balances for related party transactions [abstract] Abstract ifrs-full:OutstandingBalancesForRelatedPartyTransactionsAbstract
1610 Amounts receivable, related party transactions Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
1611 Advances to suppliers Concept (Monetary) As Of Debit ifrs-full:CurrentAdvancesToSuppliers
1612 Amounts payable, related party transactions Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
1613 2479402 - Disclosure - OTHER REQUIRED DISCLOSURES (Statement of comprehensive income) (Details) Network

*

*

 http://www.ternium.com/role/OtherRequiredDisclosuresStatementOfComprehensiveIncomeDetails
1614 Disclosure of analysis of other comprehensive income by item [table] Table

*

*

 ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable
1615 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1616 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1617 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1618 Disclosure of analysis of other comprehensive income by item [line items] LineItems ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems
1619 Other comprehensive income, before tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeBeforeTax
1620 Gains (losses) on cash flow hedges, before tax Concept (Monetary) For Period Credit tx:OtherComprehensiveIncomeLossIncreaseDecreasebeforeTax
1621 Reclassification adjustments on cash flow hedges, before tax Concept (Monetary) For Period Debit tx:ReclassificationfromAOCIbeforeTax
1622 Other comprehensive income, before tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeBeforeTax
1623 Accumulated other comprehensive income, tax Concept (Monetary) As Of Debit tx:AccumulatedOtherComprehensiveIncomeTax
1624 Gains (losses) on cash flow hedges, tax Concept (Monetary) For Period Debit tx:OtherComprehensiveIncomeLossIncreaseDecreaseTax
1625 Reclassification adjustments on exchange differences on translation, tax Concept (Monetary) For Period Credit tx:ReclassificationfromAOCITax
1626 Accumulated other comprehensive income, tax Concept (Monetary) As Of Debit tx:AccumulatedOtherComprehensiveIncomeTax
1627 Other comprehensive income, net of tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeNetofTax
1628 Gains (losses) on cash flow hedges, net of tax Concept (Monetary) For Period Credit tx:OtherComprehensiveIncomeLossIncreaseDecreaseNetofTax
1629 Reclassification adjustments on cash flow hedges, net of tax Concept (Monetary) For Period Debit tx:ReclassificationfromAOCINetofTax
1630 Other comprehensive income, net of tax, cash flow hedges Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeNetofTax
1631 Other comprehensive income, net of tax, change in value of foreign currency basis spreads Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeExchangeDifferencesonTranslation
1632 (Decrease) / Increase on change in value of currency translation adjustment Concept (Monetary) For Period Credit tx:Gainslossesonexchangedifferencesontranslation
1633 Reclassification of currency translation adjustment to income statement Concept (Monetary) For Period Debit tx:Reclassificationadjustmentsonchangeinvalueofforeigncurrencybasisspreads
1634 Other comprehensive income, net of tax, change in value of foreign currency basis spreads Concept (Monetary) As Of Credit tx:AccumulatedOtherComprehensiveIncomeExchangeDifferencesonTranslation
1635 2479403 - Disclosure - OTHER REQUIRED DISCLOSURES (Statement of cash flows) (Details) Network

*

*

 http://www.ternium.com/role/OtherRequiredDisclosuresStatementOfCashFlowsDetails
1636 Implied Table Table

*

*

 implied:Table
1637 Disclosure of additional information [Abstract] Abstract tx:DisclosureofadditionalinformationAbstract
1638 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
1639 Receivables and others Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables
1640 Trade receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
1641 Other liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherLiabilities
1642 Trade payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
1643 Increase (decrease) in working capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
1644 Tax accrued (Note 11) Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1645 Taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefund
1646 Income tax accruals less payments, total Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncomeTaxExpense
1647 Interest accrued (Note 10) Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1648 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsOperatingActivities
1649 Interest accruals less payments, total Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForInterestExpense
1650 2479404 - Disclosure - OTHER REQUIRED DISCLOSURES (Financial debt reconciliation) (Details) Network

*

*

 http://www.ternium.com/role/OtherRequiredDisclosuresFinancialDebtReconciliationDetails
1651 Disclosure of reconciliation of liabilities arising from financing activities [table] Table

*

*

 ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
1652 Liabilities arising from financing activities [axis] Axis ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
1653 Liabilities arising from financing activities [member] Member ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
1654 Finance lease liabilities Member ifrs-full:LeaseLiabilitiesMember
1655 Short term borrowings Member ifrs-full:ShorttermBorrowingsMember
1656 Long term borrowings Member ifrs-full:LongtermBorrowingsMember
1657 Disclosure of reconciliation of liabilities arising from financing activities [line items] LineItems ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
1658 Liabilities arising from financing activities, beginning balance Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
1659 Cash flows Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
1660 Reclassifications Concept (Monetary) For Period Credit tx:Increasedecreasethroughreclassificationsliabilitiesarisingfromfinancingactivities
1661 Acquisitions - finance leases Concept (Monetary) For Period Credit ifrs-full:IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities
1662 Foreign exchange adjustments Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
1663 Other non cash movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
1664 Liabilities arising from financing activities, ending balance Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
1665 2482402 - Disclosure - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS - Reclassifications and Adjustments Arising from New Impairment Rules (Details) Network

*

*

 http://www.ternium.com/role/RecentlyIssuedAccountingPronouncementsReclassificationsAndAdjustmentsArisingFromNewImpairmentRulesDetails
1666 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

 ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
1667 Equity Reclassifications And Adjustments, Initial Application Of IFRS 9 [Axis] Axis tx:EquityReclassificationsAndAdjustmentsInitialApplicationOfIFRS9Axis
1668 Equity Reclassifications And Adjustments, Initial Application Of IFRS 9 [Domain] Member tx:EquityReclassificationsAndAdjustmentsInitialApplicationOfIFRS9Domain
1669 Financial instruments Member tx:FinancialInstrumentsMember
1670 Income tax related to Financial instruments Member tx:IncomeTaxRelatedtoFinancialInstrumentsMember
1671 Allowance for impairment of trade receivables Member tx:AllowanceforImpairmentofTradeReceivablesMember
1672 Income tax related to Allowance for impairment of trade receivables Member tx:IncomeTaxRelatedtoAllowanceforImpairmentofTradeReceivablesMember
1673 Effect on Minority interest related to the adoption of IFRS 9 Member tx:EffectifMinorityInterestRelatedtotheAdoptionofIFRS9Member
1674 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1675 Equity [member] Member ifrs-full:EquityMember
1676 Reserves Member ifrs-full:OtherReservesMember
1677 Retained earnings Member ifrs-full:RetainedEarningsMember
1678 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
1679 New IFRSs [member] Member ifrs-full:NewIFRSsMember
1680 IFRS 9 Member tx:IFRS9Member
1681 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
1682 Closing balance as of December 31, 2017 - IAS 39 Concept (Monetary) As Of Credit tx:EquityCarryingAmountImmediatelyBeforeInitialApplicationOfIFRS9
1683 Impact of adopting new accounting standard Concept (Monetary) As Of Credit tx:CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption1
1684 Opening balance as of January 1, 2018 - IFRS 9 Concept (Monetary) As Of Credit tx:EquityCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
1685 2482403 - Disclosure - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS - Total Impact on the Company's Financial Instruments (Details) Network

*

*

 http://www.ternium.com/role/RecentlyIssuedAccountingPronouncementsTotalImpactOnCompanysFinancialInstrumentsDetails
1686 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

 ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
1687 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1688 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1689 Fair value through profit or loss Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1690 Fair value through other comprehensive income Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1691 Held to maturity Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1692 Amortized cost (Loans and receivables 2017) Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1693 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
1694 Closing balance as of December 31, 2017 - IAS 39 Concept (Monetary) As Of Debit tx:FinancialAssetsCarryingAmountImmediatelyBeforeInitialApplicationOfIFRS9
1695 Reclassification of Investments in bonds from Held to maturity to Fair value through other comprehensive income Concept (Monetary) For Period ifrs-full:ReclassificationOfFinancialAssetsOutOfMeasuredAtAmortisedCostIntoMeasuredAtFairValueThroughOtherComprehensiveIncome
1696 Reclassification of Investments in bonds from Fair value through profit or loss to Fair value through other comprehensive income Concept (Monetary) For Period ifrs-full:ReclassificationOfFinancialAssetsOutOfMeasuredAtFairValueThroughProfitOrLossIntoMeasuredAtFairValueThroughOtherComprehensiveIncome
1697 Reclassification of Other financial Instruments from Fair value through profit or loss to Amortized cost Concept (Monetary) For Period ifrs-full:ReclassificationOfFinancialAssetsOutOfMeasuredAtFairValueIntoMeasuredAtAmortisedCost
1698 Adjustment of Other comprehensive income from adoption of IFRS 9 Concept (Monetary) For Period Debit tx:AdjustmentofothercomprehensiveincomefromadoptionofIFRS9
1699 Opening balance as of January 1, 2018 - IFRS 9 Concept (Monetary) As Of Debit tx:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
1700 2482404 - Disclosure - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS - Allowance for Trade Receivables (Details) Network

*

*

 http://www.ternium.com/role/RecentlyIssuedAccountingPronouncementsAllowanceForTradeReceivablesDetails
1701 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

 ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
1702 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1703 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1704 Non-guaranteed trade receivables - Gross carrying amount Member tx:TradereceivablesnotguaranteedMember
1705 Trade receivables Member ifrs-full:TradeReceivablesMember
1706 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1707 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1708 Accumulated impairment Member ifrs-full:AccumulatedImpairmentMember
1709 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1710 Past due status [member] Member ifrs-full:PastDueStatusMember
1711 Fully performing Member ifrs-full:CurrentMember
1712 Past due between 1 and 90 days Member ifrs-full:NotLaterThanThreeMonthsMember
1713 Past due between 91 and 360 days Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanOneYearMember
1714 Past due more than 360 days Member ifrs-full:LaterThanOneYearMember
1715 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
1716 New IFRSs [member] Member ifrs-full:NewIFRSsMember
1717 IFRS 9 Member tx:IFRS9Member
1718 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
1719 Expected loss rate Concept (Percent) As Of ifrs-full:ExpectedCreditLossRate
1720 Trade receivables, net Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1721 2482405 - Disclosure - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS - Narrative (Details) Network

*

*

 http://www.ternium.com/role/RecentlyIssuedAccountingPronouncementsNarrativeDetails
1722 Disclosure of voluntary change in accounting policy [table] Table

*

*

 ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyTable
1723 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
1724 New IFRSs [member] Member ifrs-full:NewIFRSsMember
1725 IFRS 16 Member tx:IFRS16Member
1726 Subsequent Event Type1 [Axis] Axis tx:SubsequentEventType1Axis
1727 Subsequent Event Type1 [Domain] Member tx:SubsequentEventType1Domain
1728 Subsequent Event Member tx:SubsequentEvent1Member
1729 Disclosure of voluntary change in accounting policy [line items] LineItems ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyLineItems
1730 Customer advances Concept (Monetary) As Of Credit ifrs-full:Advances
1731 Leases, right-of-use asset Concept (Monetary) As Of Debit ifrs-full:RightofuseAssets
1732 Leases, liability Concept (Monetary) As Of Credit ifrs-full:LeaseLiabilities
1733 2485402 - Disclosure - FINANCIAL RISK MANAGEMENT (Assumed financial exposure to currency risk) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementAssumedFinancialExposureToCurrencyRiskDetails
1734 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1735 Functional Currency [Axis] Axis tx:FunctionalCurrencyAxis
1736 Functional Currency [Domain] Member tx:FunctionalCurrencyDomain
1737 United States of America, Dollars Member currency:USD
1738 Argentina, Pesos Member currency:ARS
1739 Currency [Axis] Axis tx:Currency1Axis
1740 Currency [Domain] Member tx:CurrencyDomain
1741 United States of America, Dollars Member currency:USD
1742 Euro Member Countries, Euro Member currency:EUR
1743 Argentina, Pesos Member currency:ARS
1744 Mexico, Pesos Member currency:MXN
1745 Brazil, Brazil Real Member currency:BRL
1746 Colombia, Pesos Member currency:COP
1747 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1748 Risks [member] Member ifrs-full:TypesOfRisksMember
1749 Currency risk Member ifrs-full:CurrencyRiskMember
1750 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1751 Risk exposure associated with instruments sharing characteristic Concept (Monetary) As Of ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic
1752 2485403 - Disclosure - FINANCIAL RISK MANAGEMENT (Market risk narrative) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementMarketRiskNarrativeDetails
1753 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1754 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1755 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1756 Floating Rate Member ifrs-full:FloatingInterestRateMember
1757 Range [axis] Axis ifrs-full:RangeAxis
1758 Ranges [member] Member ifrs-full:RangesMember
1759 Weighted average Member ifrs-full:WeightedAverageMember
1760 Currency [Axis] Axis tx:Currency1Axis
1761 Currency [Domain] Member tx:CurrencyDomain
1762 Argentina, Pesos Member currency:ARS
1763 Mexico, Pesos Member currency:MXN
1764 Colombia, Pesos Member currency:COP
1765 Brazil, Brazil Real Member currency:BRL
1766 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1767 Risks [member] Member ifrs-full:TypesOfRisksMember
1768 Currency risk Member ifrs-full:CurrencyRiskMember
1769 Interest rate risk Member ifrs-full:InterestRateRiskMember
1770 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1771 Devaluation, percent Concept (Percent) For Period tx:SensitivityAnalysisForTypeofMarketRIskChangeInRiskVariablePercent
1772 Change in risk variable, impact on comprehensive income Concept (Monetary) For Period Credit tx:SensitivityAnalysisForTypesOfMarketRiskChangeInRiskVariableImpactOnComprehensiveIncome
1773 Change in risk variable, impact on profit and loss Concept (Monetary) For Period Credit tx:SensitivityAnalysisForTypesOfMarketRiskChangeInRiskVariableImpactOnProfitandLoss
1774 Effect of inflation adjustment Concept (Monetary) For Period Debit tx:Effectofinflationadjustment
1775 Reasonably possible change in risk variable, percent Concept (Percent) For Period tx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent
1776 Reasonably possible change in risk variable, impact on pre-tax earnings Concept (Monetary) For Period Debit tx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnPreTaxEarnings
1777 Net investments exposed to volatility in exchange rate, amount Concept (Monetary) For Period Debit tx:SensitivityAnalysisForTypesOfMarketRiskNetInvestmentsExposedtoVolatilityinExchangeRatesAmount
1778 Reasonably possible change in risk variable, impact on equity Concept (Monetary) For Period Credit tx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnEquity
1779 Borrowings, interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1780 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1781 Borrowings, percentage of total borrowings Concept (Percent) As Of tx:Borrowingspercentageoftotalborrowings
1782 2485404 - Disclosure - FINANCIAL RISK MANAGEMENT (Credit risk narrative) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementCreditRiskNarrativeDetails
1783 Disclosure of credit risk exposure [table] Table

*

*

 ifrs-full:DisclosureOfCreditRiskExposureTable
1784 Guarantor Obligations, Nature [Axis] Axis tx:GuarantorObligationsNatureAxis
1785 Guarantor Obligations, Nature [Domain] Member tx:GuarantorObligationsNatureDomain
1786 Performance Guarantee Member tx:PerformanceGuarantee1Member
1787 Credit Insurance Member tx:CreditInsuranceMember
1788 Guarantee Type, Other Member tx:GuaranteeTypeOther1Member
1789 Financial Instrument Performance Status [Axis] Axis tx:FinancialInstrumentPerformanceStatus1Axis
1790 Financial Instrument Performance Status [Domain] Member tx:FinancialInstrumentPerformanceStatus1Domain
1791 Performing Financial Instruments Member tx:PerformingFinancialInstrumentsMember
1792 Financing Receivables, Period Past Due [Axis] Axis tx:FinancingReceivablesPeriodPastDue1Axis
1793 Financing Receivables, Period Past Due [Domain] Member tx:FinancingReceivablesPeriodPastDue1Domain
1794 Financing Receivables, Equal to Greater than 1 Day Past Due Member tx:FinancingReceivablesEqualtoGreaterthan1DayPastDueMember
1795 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1796 Risks [member] Member ifrs-full:TypesOfRisksMember
1797 Credit risk Member ifrs-full:CreditRiskMember
1798 Disclosure of credit risk exposure [line items] LineItems ifrs-full:DisclosureOfCreditRiskExposureLineItems
1799 Financial assets, investments assessed as investment grade, percent Concept (Percent) As Of tx:Financialassetsinvestmentsassessedasinvestmentgradepercent
1800 Trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
1801 Allowance for doubtful account Concept (Monetary) As Of Credit tx:AllowanceforDoubtfulAccountsReceivable
1802 2485405 - Disclosure - FINANCIAL RISK MANAGEMENT (Assumed financial exposure to credit risk) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementAssumedFinancialExposureToCreditRiskDetails
1803 Disclosure of credit risk exposure [table] Table

*

*

 ifrs-full:DisclosureOfCreditRiskExposureTable
1804 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1805 Risks [member] Member ifrs-full:TypesOfRisksMember
1806 Credit risk Member ifrs-full:CreditRiskMember
1807 Currency [Axis] Axis tx:Currency1Axis
1808 Currency [Domain] Member tx:CurrencyDomain
1809 United States of America, Dollars Member currency:USD
1810 Euro Member Countries, Euro Member currency:EUR
1811 Argentina, Pesos Member currency:ARS
1812 Mexico, Pesos Member currency:MXN
1813 Brazil, Brazil Real Member currency:BRL
1814 Colombia, Pesos Member currency:COP
1815 Other currencies Member tx:OthercurrenciesMember
1816 Disclosure of credit risk exposure [line items] LineItems ifrs-full:DisclosureOfCreditRiskExposureLineItems
1817 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
1818 2485406 - Disclosure - FINANCIAL RISK MANAGEMENT (Liquidity risk) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementLiquidityRiskDetails
1819 Disclosure of maturity analysis for financial assets held for managing liquidity risk [table] Table

*

*

 ifrs-full:DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskTable
1820 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1821 Risks [member] Member ifrs-full:TypesOfRisksMember
1822 Liquidity risk Member ifrs-full:LiquidityRiskMember
1823 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1824 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1825 Borrowings Member tx:Borrowings1Member
1826 Interests to be accrued Member tx:IntereststobeaccruedMember
1827 Trade payables and other liabilities Member tx:TradepayablesandotherliabilitiesMember
1828 Maturity [axis] Axis ifrs-full:MaturityAxis
1829 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1830 2019 Member ifrs-full:NotLaterThanOneYearMember
1831 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1832 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1833 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1834 Thereafter Member ifrs-full:LaterThanFiveYearsMember
1835 Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskLineItems
1836 Borrowings Concept (Monetary) As Of Credit tx:Bankborrowingsundiscountedcashflowsprincipal
1837 Interest to be accrued Concept (Monetary) As Of Credit tx:Bankborrowingsundiscountedcashflowsinterest
1838 Trade payables and other liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows
1839 Total Concept (Monetary) As Of Credit tx:DerivativeAndNonDerivativeFinancialLiabilitiesUndiscountedCashFlows
1840 2485407 - Disclosure - FINANCIAL RISK MANAGEMENT (Capital risk narrative) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementCapitalRiskNarrativeDetails
1841 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1842 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1843 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1844 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1845 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1846 Debt to capital ratio Concept (Percent) As Of tx:DebtToCapitalRatio
1847 Reserve of cash flow hedges, net of tax Concept (Monetary) As Of Credit tx:Reserveofcashflowhedgesnetoftax
1848 2485408 - Disclosure - FINANCIAL RISK MANAGEMENT (Financial assets and liabilities) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementFinancialAssetsAndLiabilitiesDetails
1849 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1850 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1851 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1852 Loans and receivables Member ifrs-full:LoansAndReceivablesCategoryMember
1853 Amortized cost Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1854 Assets at fair value through profit or loss Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1855 Assets at fair value through OCI Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1856 Held to maturity Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1857 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1858 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
1859 Derivatives Member ifrs-full:DerivativesMember
1860 Liabilities at fair value through profit or loss Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
1861 Amortized cost Member ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
1862 Held to maturity Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1863 Other financial liabilities Member tx:OtherfinancialliabilitiesMember
1864 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1865 Financial assets [abstract] Abstract ifrs-full:DisclosureOfFinancialAssetsAbstract
1866 Receivables Concept (Monetary) As Of Debit tx:Receivables
1867 Derivative financial instruments Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
1868 Trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
1869 Trade receivables, net Concept (Monetary) As Of Debit tx:Tradereceivablesnet
1870 Other investments Concept (Monetary) As Of Debit tx:Otherinvestments
1871 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1872 Total Assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1873 Financial liabilities [abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
1874 Other liabilities Concept (Monetary) As Of Credit ifrs-full:OtherLiabilities
1875 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesToTradeSuppliers
1876 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1877 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
1878 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1879 Total Liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1880 2485409 - Disclosure - FINANCIAL RISK MANAGEMENT (Financial assets and liabilities at fair value) (Details) Network

*

*

 http://www.ternium.com/role/FinancialRiskManagementFinancialAssetsAndLiabilitiesAtFairValueDetails
1881 Disclosure of fair value measurement of assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
1882 Classes of liabilities [axis] Axis ifrs-full:ClassesOfLiabilitiesAxis
1883 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1884 Derivatives Member ifrs-full:DerivativesMember
1885 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1886 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1887 Cash and cash equivalents Member tx:CashAndCashEquivalents1Member
1888 Other investments Member tx:OtherInvestments1Member
1889 Derivatives Member ifrs-full:DerivativesMember
1890 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1891 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1892 Level 1 Member ifrs-full:Level1OfFairValueHierarchyMember
1893 Level 2 Member ifrs-full:Level2OfFairValueHierarchyMember
1894 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
1895 Financial assets, at fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1896 Financial liabilities, at fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1897 2486401 - Disclosure - SUBSEQUENT EVENTS - Techgen Refinancing (Details) Network

*

*

 http://www.ternium.com/role/SubsequentEventsTechgenRefinancingDetails
1898 Disclosure of non-adjusting events after reporting period [table] Table

*

*

 ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
1899 Legal Entity [Axis] Axis dei:LegalEntityAxis
1900 Entity [Domain] Member dei:EntityDomain
1901 Ternium S.A. and Ternium Investments S.a r.l. Member tx:TerniumS.A.andTerniumInvestmentsS.ar.l.Member
1902 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1903 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1904 Techgen Refinancing Member tx:TechgenRefinancingMember
1905 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
1906 Original principal amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1907 Percentage of the debt service coverage ratio covered by stand-by letters of credit Concept (Percent) For Period tx:Percentageofthedebtservicecoverageratiocoveredbystandbylettersofcredit
1908 Amount of the debt service coverage ratio covered by stand-by letters of credit Concept (Monetary) As Of Debit tx:Amountofthedebtservicecoverageratiocoveredbystandbylettersofcredit

*

*