ts_NationalizationOfSubsidiariesPostawardInterestRate
Nationalization of subsidiaries, post-award interest rate
The rate at which interest will accrue if compensation for the nationalization of subsidiaries is not received by the due date.
Disclosure of net defined benefit liability (asset) [text block]
ifrs-full_DividendsPaidClassifiedAsFinancingActivities
Dividends paid
Scenario [Axis]
Matesi Materiales Siderúrgicos S.A [member]
The entity Matesi Materiales Siderúrgicos S.A.
Scenario, Unspecified [Domain]
ts_NationalizationOfSubsidiariesPreawardInterest
Nationalization of subsidiaries, pre-award interest
The amount of pre-award interest associated with compensation for the nationalization of subsidiaries.
Statement Table [Table]
ts_NationalizationOfSubsidiariesCompensationAwardIncludingPreawardInterest
Nationalization of subsidiaries, compensation award including pre-award interest
The amount awarded, including pre-award interest, as compensation for the nationalization of subsidiaries.
Statement Line Items [Line Items]
Tavsa and Comsigua [member]
The entities AVSA - Tubos de Acero de Venezuela S.A. and Complejo Siderúrgico de Guayana, C.A.
Discloure of Significant Accounting Policies
ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Repayments of borrowings
Disclosure of derivative financial instruments [text block]
Document And Entity Information
Description of accounting policy for current and deferred income tax [text block]
The description of the entity's accounting policy for current and deferred income tax.
Proceeds from borrowings
ts_NationalizationOfSubsidiariesReimbursementOfLegalFees
Nationalization of subsidiaries, reimbursement of legal fees
The amount of reimbursement of legal fees associated with the nationalization of subsidiaries.
Note To Financial Statement Details Textual
ts_NationalizationOfSubsidiariesBasisSpreadOnVariableRate
Nationalization of subsidiaries, basis spread on variable rate
Percentage points added to the reference rate to compute the variable rate on the interest receivable associated with the nationalization of subsidiaries.
Significant Accounting Policies
Top of range [member]
Accounting Policies
Finance lease liabilities [member]
Represents finance lease liabilities.
Financial Risk Management
Weighted average [member]
Description of accounting policy for basis of presentation [text block]
The description of the entity's accounting policy for basis of presentation.
Note 1 - Segment Information
Note 2 - Cost of Sales
Bank borrowings [member]
Represents bank borrowings.
Fixed interest rate [member]
Note 3 - Selling, General and Administrative Expenses
Cash flows from financing activities
Current borrowings before costs of issue of debt
The amount of current borrowings before the costs of issue of debt.
Note 4 - Labor Costs - Labor Costs (Included in Cost of Sales and in Selling, General and Administrative Expenses)
ifrs-full_CashFlowsFromUsedInInvestingActivities
Net cash provided by (used in) investing activities
Floating interest rate [member]
ts_NoncurrentCostsOfIssueOfDebt
Non-current costs of issue of debt
The amount of costs of issue of debt classified as non-current.
Ranges [member]
Note 5 - Other Operating Income and Expenses
ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries
Acquisitions of non-controlling interests
Bank overdrafts [member]
Represents bank overdrafts.
Range [axis]
Note 6 - Financial Results
Non-current borrowings before costs of issue of debt
The amount of non-current borrowings before the costs of issue of debt.
Note 7 - Equity in Earnings (Losses) of Non-consolidated Companies
Other borrowings [member]
Represents other borrowings.
Note 8 - Income Tax
Vehicles, furniture and fixtures, and other equipment [member]
This member stands for a class of property, plant and equipment representing vehicles, furniture and fixtures, and other equipment held by the entity for use in operations.
Interest rate types [member]
Note 10 - Property, Plant and Equipment, Net
Provided by (used in) investing activities
ts_CurrentCostsOfIssueOfDebt
Current costs of issue of debt
The amount of costs of issue of debt classified as current.
Types of interest rates [axis]
Note 11 - Intangible Assets, Net
Property, plant and equipment (Year)
Represents the useful lives or depreciation rates used for property, plant and equipment.
Note 12 - Investments in Non-consolidated Companies
ts_BorrowingsIncludingInterestToBeAccrued
Total
The amount of borrowings including interest to be accrued.
Note 13 - Receivables - Non Current
Note 14 - Inventories
Disclosure of detailed information about borrowings [text block]
Buildings and improvements [member]
This member stands for a class of property, plant and equipment representing buildings and equipment held by the entity for use in operations.
Changes in investments in securities
Note 15 - Receivables and Prepayments
Plant and production equipment [member]
This member stands for a class of property, plant and equipment representing plant and production equipment used in operations.
Note 16 - Current Tax Assets and Liabilities
ifrs-full_PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
Investment in companies under cost method
Note 17 - Trade Receivables
Note 18 - Cash and Cash Equivalents and Other Investments
Note 19 - Borrowings
Note 20 - Deferred Income Tax
Capital expenditures
Capital expenditures
Capital expenditures
Other currency [member]
Represents currencies not otherwise specified.
Proceeds from disposal of Conduit business
Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations
Disclosure of detailed information about borrowings by currency and rate [text block]
The disclosure of detailed information about borrowings by currency and rate.
Note 21 - Other Liabilities
Currency [Axis]
Information by currency.
Note 22 - Non-current Allowances and Provisions
Currency [Domain]
Note 23 - Current Allowances and Provisions
Proceeds from disposal of property, plant and equipment and intangible assets
Detailed disclosure of cash and cash equivalents and other investments [text block]
The detailed disclosure of cash and cash equivalents and other investments.
Note 24 - Derivative Financial Instruments
Note 25 - Contingencies, Commitments and Restrictions On the Distribution of Profits
Fixed Income (time-deposit, zero coupon bonds, commercial papers) [member]
Represents fixed income (time-deposit, zero coupon bonds, commercial papers).
Disclosure of cash and cash equivalents and other investments [text block]
The disclosure of cash and cash equivalents and other investments.
Hedge accounting reserve
Reserve of cash flow hedges, continuing hedges
Hedge accounting reserve
Hedge accounting reserve
Note 27 - Cash Flow Disclosures
Note 28 - Net Assets of Disposal Group Classified As Held for Sale
Movements
Note 29 - Related Party Transactions
Other investments [member]
Investments classified as other.
Note 30 - Principal Subsidiaries
Other investments - current:
Note 32 - Fees Paid to the Company's Principal Accountant
Bonds and other fixed income [member]
Represents bonds and other fixed income.
Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Details)
Fund investments [member]
Represents fund investments.
Types of hedges [axis]
Financial Risk Management - Financial Assets and Liabilities Which Impact Profit and Loss (Details)
ts_DebtToEquityRatio
Debt to equity ratio
The year-end ratio of debt to total equity (where “debt” comprises financial borrowings and “total equity” is the sum of financial borrowings and equity).
Financial Risk Management - Proportions of Variable-rate and Fixed-rate Debt (Details)
Financial Risk Management - Financial Instruments and Classification Within the Fair Value Hierarchy (Details)
Other investments - Non-current:
Hedges [member]
Financial Risk Management - Changes in Level 3 Assets and Liabilities (Details)
Non taxable income / Non deductible expenses, net
Represents the amount of difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to revenues that are exempt from taxation and to expenses not deductible in determining taxable profit (tax loss).
Note 1 - Segment Information - Reportable Operating Segments (Details)
Additions
Investment in non-consolidated companies
U.S. dollar / Brazilian Real foreign exchange risk [member]
Represents a U.S. dollar / Brazilian Real foreign exchange risk.
Percentage
Concentration Risk, percentage
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.
Note 1 - Segment Information - Geographical Information (Details)
Argentine Peso / U.S. dollar foreign exchange risk [member]
Represents a Argentine Peso / U.S. dollar foreign exchange risk.
Note 2 - Cost of Sales - Components of Cost of Sales (Details)
Disclosure of detailed information about hedged items [text block]
Euro / U.S. dollar foreign exchange risk [member]
Represents a Euro / U.S. dollar foreign exchange risk.
Note 3 - Selling, General and Administrative Expenses - Components of Selling, General and Administrative Expenses (Details)
Disclosure of difference between income before tax and the theoretical amount that would arise using tax rate in each country [text block]
The disclosure of detailed information about the differences between income before tax and the theoretical amount that would arise using the tax rate in each country.
Note 4 - Labor Costs - Summary of Labor Costs (Included in Cost of Sales and in Selling, General and Administrative Expenses) (Details)
ts_GainLossOnInterestRateRiskIfMarketInterestRatesWereHigher
Gain (loss) on interest rate risk if market interest rates were higher
The amount of potential gain (loss) on interest rate risk if the market interest rates were higher.
Note 5 - Other Operating Income and Expenses - Components of Other Operating Income and Expenses (Details)
Current Borrowings [member]
Represents borrowings classified as current.
Dividends received from non-consolidated companies
Dividends and distributions received (*)
Note 6 - Financial Results - Financial Income (Cost) (Details)
Note 7 - Equity in Earnings (Losses) of Non-consolidated Companies - Equity in Earnings (Losses) of Non-consolidated Companies (Details)
Guarantees under credit insurance [member]
Represents guarantees under credit insurance.
Note 8 - Income Tax - Summary of Income Tax Expense (Benefit) (Details)
Note 8 - Income Tax - Summary of Differences Between Income Tax and Theoretical Amount Using Tax Rate in Each Country (Details)
Disclosure of detailed information about income tax expense (benefit) [text block]
The disclosure of detailed information about income tax expense (benefit).
Note 10 - Property, Plant and Equipment, Net - Components of Property, Plant and Equipment, Net (Details)
Customer concentration risk [member]
Reflects the percentage that revenues or credit exposure in the period are from one or more significant customers. The risk is the materially adverse effects of loss of a significant customer.
Note 11 - Intangible Assets, Net - Intangible Assets and Goodwill (Details)
Changes in advance to suppliers of property, plant and equipment
Note 11 - Intangible Asset, Net - Goodwill Allocated by CGU (Details)
Past due [member]
Represents a financial instrument which is past due.
Note 12 - Investments in Non-consolidated Companies - Summary of Investments in Non-consolidated Companies (Details)
Hedging instruments [member]
Letter of credit and other bank guarantees [member]
Represents letter of credit and other bank guarantees.
Note 12 - Investments in Non-consolidated Companies - Principal Non-consolidated Companies (Details)
Hedging instruments [axis]
Other guarantees [member]
Represents other guarantees.
Note 12 - Investments in Non-consolidated Companies - Summary of Selected Financial Information (Details)
Note 13 - Receivables - Non Current - Components of Receivables Non Current (Details)
ts_LiquidFinancialAssetsPercentageDenominatedByASpecificCurrency
Liquid financial assets, percentage denominated by a specific currency
The percentage of liquid financial assets that are denominated by a specific currency.
Note 14 - Inventories - Components of Inventories (Details)
Counterparty risk [member]
Represents the percentage of financial assets held with counter parties rated as investment grade.
Note 15 - Receivables and Prepayments - Summary of Receivables and Prepayments (Details)
ts_LiquidFinancialAssetsPercentage
Liquid financial assets, percentage
The percentage of assets held that are liquid.
Note 16 - Current Tax Assets and Liabilities - Summary of Current Tax Assets (Details)
Note 16 - Current Tax Assets and Liabilities - Summary of Current Tax Liabilities (Details)
Note 17 - Trade Receivables - Summary of Current Trade Receivables (Details)
Unfunded post-employment benefits [member]
This member stands for unfunded post-employment benefits.
Note 17 - Trade Receivables - Summary of the Aging of Trade Receivables (Details)
Funded post-employment benefits [member]
This member stands for funded post-employment benefits.
Note 18 - Cash and Cash Equivalents and Other Investments - Components of Cash and Cash Equivalents and Other Investments (Details)
ts_FinancialLiabilitiesFairValueAsAPercentageOfCarryingValue
Financial liabilities, fair value as a percentage of carrying value
The percentage of a financial liabilities carrying amount that represents its fair value.
ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
Acquisition of subsidiaries
Note 19 - Borrowings - Non-current and Current Borrowings (Details)
ts_OverfundedPlan
Overfunded Plan
Defined benefit plan in which retirement benefits are payable directly from plan assets segregated and restricted to provide such benefits and for which plan assets exceed benefit obligation of plan designed to provide retirement benefits.
Note 19 - Borrowings - Maturity of Borrowings (Details)
Currency exposure / functional currency
Foreign exchange risk, currency exposure
The amount of currency exposure which impact profit and loss expressed as long/(short).
Note 19 - Borrowings - Significant Borrowings as of Closing Date (Details)
ts_FinancialAssetsFairValueAsAPercentageOfCarryingValue
Financial assets, fair value as a percentage of carrying value
The percentage of a financial assets carrying amount that represents its fair value.
Note 19 - Borrowings - Weighted Average Interest Rates of Borrowings (Details)
(Used in) provided by operating activities
Miscellaneous
The amount of other non-current miscellaneous liabilities.
Note 19 - Borrowings - Borrowings by Currency and Rate (Details)
Note 19 - Borrowings - Borrowings Evolution (Details)
Note 20 - Deferred Income Tax - Deferred Tax Assets and Liabilities (Details)
Cash flows from investing activities
Post-employment benefits
The amount of non-current post-employment benefits.
ifrs-full_CashFlowsFromUsedInOperatingActivities
Net cash (used in) provided by operating activities
Note 20 - Deferred Income Tax - Recovery Analysis of Deferred Tax Assets and Liabilities (Details)
Other-long term benefits
The amount of other non-current benefits.
ts_DividendsPayableAmountPerADS
Dividends payable, amount per ads
The per American Depositary Security "ADS" amount of a dividend declared or approved, but not yet paid. One ADS equals two shares.
Note 20 - Deferred Income Tax - Net Deferred Tax Liabilities (Assets) (Details)
ts_DividendsPaidPerADS
Dividends paid, per ads
The amount of dividends paid per American Depositary Security "ADS". One ADS equals two shares.
Note 21 - Other Liabilities - Other Noncurrent Liabilities (Details)
Note 21 - Other Liabilities - Post-employment benefits (Details)
Note 21 - Other Liabilities - Actuarial Assumptions (Details)
ts_ReceivablesAndPrepaymentsPrepaidExpensesAndOtherReceivables
Prepaid expenses and other receivables
The amount of prepaid expenses and other receivables attributable to receivables and prepayments.
Note 21 - Other Liabilities - Plan Assets (Details)
ts_ReceivablesAndPrepaymentsGovernmentEntities
Government entities
The amount of government entities attributable to receivables and prepayments.
Note 21 - Other Liabilities - Other Current Liabilities (Details)
Disclosure of receivables and prepayments [text block]
The disclosure of receivables and prepayments.
ifrs-full_IncreaseDecreaseInWorkingCapital
Changes in working capital
Note 22 - Non-current Allowances and Provisions - Deducted From Non-current Receivables (Details)
Disclosure of detailed information about receivables and prepayments [text block]
The disclosure of detailed information about receivables and prepayments.
Note 22 - Non-current Allowances and Provisions - Liabilities (Details)
ts_ReceivablesAndPrepaymentsGovernmentTaxRefundsOnExports
Government tax refunds on exports
The amount of government tax refunds on exports that are attributable to receivables and prepayments.
Note 23 - Current Allowances and Provisions - Deducted From Assets (Details)
ts_ReceivablesAndPrepaymentsReceivablesFromRelatedParties
Receivables from related parties
The amount of receivables from related parties that are attributable to receivables and prepayments.
Note 23 - Current Allowances and Provisions - Liabilities (Details)
ts_ReceivablesAndPrepaymentsEmployeeAdvancesAndLoans
Employee advances and loans
The amount of employee advances and loans that are attributable to receivables and prepayments.
Note 24 - Derivative Financial Instruments - Net Fair Values (Details)
ts_ReceivablesAndPrepaymentsAdvancesToSuppliersAndOtherAdvances
Advances to suppliers and other advances
The amount of advances to suppliers and other advances that are attributable to receivables and prepayments.
Note 24 - Derivative Financial Instruments - Foreign Exchange Derivative Contracts and Hedge Accounting (Details)
Note 24 - Derivative Financial Instruments - Hedge Reserve Evolution (Details)
ts_ReceivablesAndPrepaymentsGross
The gross amount of receivables and prepayments.
Note 25 - Contingencies, Commitments and Restrictions on the Distribution of Profits - Equity As Defined Under Luxembourg Law and Regulations (Details)
ts_AllowanceForOtherDoubtfulAccounts
Allowance for other doubtful accounts (see Note 23 (i))
Represents a valuation allowance for other doubtful accounts that are expected to be uncollectible.
Note 25 - Contingencies, Commitments and Restrictions on the Distribution of Profits - Distributable Amount Under Luxembourg Law (Details)
ts_ReceivablesAndPrepaymentsDerivativeFinancialInstruments
Derivative financial instruments
The amount of derivative financial instruments that are attributable to receivables and prepayments.
ts_ReceivablesAndPrepaymentsMiscellaneous
Miscellaneous
The amount of miscellaneous items that are attributable to receivables and prepayments.
Note 27 - Cash Flow Disclosures - Cash Flow Disclosures (Details)
Note 28 - Net Assets of Disposal Group Classified As Held for Sale - Components of Discontinued Operation's Net Income (Details)
ifrs-full_InterestPaidClassifiedAsOperatingActivities
Interest paid
Note 28 - Net Assets of Disposal Group Classified As Held for Sale - Components Gain on Sale After Income Tax for Disposals (Details)
Note 28 - Net Assets of Disposal Group Classified As Held for Sale - Discontinued Operations (Details)
ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities
Taxes paid
Interest received
ifrs-full_InterestReceivedClassifiedAsOperatingActivities
Note 29 - Related Party Transactions - Transactions Carried Out With Related Parties (Details)
Income (loss) for the year
Income (loss) for the year
Income (loss) for the year
Note 30 - Principal Subsidiaries - Percentage of Ownership of Each Controlled Company (Details)
Disclosure of detailed information about property, plant and equipment [text block]
Note 32 - Fees Paid to the Company's Principal Accountant - Fees Accrued for Professional Services (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Cash flows from operating activities
Prepaid taxes
Represents the amount of current prepaid taxes.
Disclosure of detailed information about current tax assets [text block]
The disclosure of detailed information about current tax assets.
Disclosure of detailed information about tax liabilities [text block]
The disclosure of detailed information about current tax liabilities.
Income tax liabilities
The amount of current income tax liabilities.
Other taxes
Represents the amount of current other tax liabilities.
Segments [axis]
Current accounts
Represents the amount of current accounts attributable to current trade receivables.
Reportable segments [member]
Segments [member]
ts_CurrentTradeReceivablesAllowanceForDoubtfulAccounts
Allowance for doubtful accounts (see Note 23 (i))
Represents a valuation allowance for trade receivables due to an Entity within one year (or one operating cycle if longer) that are expected to be uncollectible.
Argentina, Pesos
ts_CurrentTradeReceivablesGross
The gross amount of current trade receivables.
Disclosure of detailed information about financial instruments at fair value by category and levels [text block]
The disclosure of detailed information about financial instruments at fair value by category and levels.
Disclosure of detailed information about current trade receivables [text block]
The disclosure of detailed information about current trade receivables.
Guaranteed
Represents the amount current trade receivables that are guaranteed.
ts_IncreaseDecreaseFromCurtailmentsAndSettlementsNetDefinedBenefitLiabilityAsset
Curtailments and settlements
The increase (decrease) in the net defined benefit liability (asset) resulting from curtailments and settlements.
Non - U.S. Sovereign Bills [member]
Securities classified as Non - U.S. Sovereign Bill.
Current trade receivables, not due [member]
Information related to current trade receivables that currently not due.
Not guaranteed
Represents the amount of current trade receivables that are not guaranteed.
Disclosure if detailed information about the aging of trade receivables [text block]
The disclosure of detailed information about current trade receivables.
Geographical areas [member]
Other notes [member]
Securities classified as other notes.
Geographical areas [axis]
U.S. government securities [member]
Securities classified as U.S. government securities.
Certificates of Deposits [member]
Securities classified as Certificates of Deposits.
Commercial Papers [member]
Securities classified as Commercial Papers.
Corporates securities [member]
Securities classified as Corporates securities.
ifrs-full_FinancialAssets
Total
Mortgage- and Asset-backed securities [member]
Securities classified as Mortgage- and Asset-backed securities.
Non - U.S. government securities [member]
Securities classified as Non - U.S. government securities.
Current trade receivables, past due, less than 180 days [member]
Information about current trade receivables that are less than 180 days past due.
Disclosure of dividends [text block]
Other receivables (non-Financial) [member]
Assets classified as other receivables (non-financial).
Other liabilities (non-Financial) [member]
Liabilities classified as other liabilities (non-financial).
Current trade receivables, past due, greater than 180 days [member]
Information related to current trade receivables that are greater than 180 days past due.
Disclosure of discontinued operations [text block]
Other receivables [member]
Assets classified as other receivables.
Structured Notes [member]
Securities classified as Structured Notes.
Other liabilities [member]
Liabilities classified as other.
ifrs-full_LoansAndReceivables
Loans and receivables
Ternium s.a. [member]
ts_ClosingPricePerADS
Closing price, per ads
Represents the closing price per American Depositary Security "ADS" as quoted on the New York Stock Exchange.
Disclosure of actuarial assumptions [text block]
The disclosure of actuarial assumptions pf defined benefit plan.
United States of America, Dollars
Weighted average number of ordinary shares (thousands) (in shares)
ts_DividendsPayableIncludingInterimDividends
Dividends payable including interim dividends
The amount of dividends payable including a portion which was paid previously in an interim dividend.
ts_DividendsPayableAmountPerAdsIncludingInterimDividend
Dividends payable, amount per ads including interim dividend
The per American Depositary Security "ADS" amount of a dividend payable including an interim dividend paid previously. One ADS equals two shares.
ts_ClosingPricePerShare
Closing price, per share
Represents the quoted closing price per share of stock.
Techgen s.a. [member]
Information related to Techgen S.A. "Techgen".
Held-to-maturity investments, category [member]
Financial assets available-for-sale, category [member]
ts_DividendsPayableAmountPerShareIncludingInterimDividend
Dividends payable, amount per share including interim dividend
The per share amount of a dividend payable including an interim dividend previously paid.
Loans and receivables, category [member]
ifrs-full_ReserveOfExchangeDifferencesOnTranslation
Reserve of exchange differences on translation
Financial assets at fair value through profit or loss, category [member]
ts_ProportionOfCorporateGuaranteeCoveringObligations
Proportion of corporate guarantee covering obligations
Represents the proportion of a corporate guarantee that covers obligations made under a syndicated loan agreement.
Total
Disclosure of effect of changes in foreign exchange rates [text block]
Financial assets, category [member]
Categories of financial assets [axis]
ts_OtherAssetsPercentContributedToFairValueOfPlanAssets
Others
The percent that other types of assets not separately disclosed constitute of the fair value of defined benefit plan assets.
ts_EquityInstrumentsPercentContributedToFairValueOfPlanAssets
Equity instruments
The percent that instruments representing equity (rather than debt) constitute of the fair value of defined benefit plan assets.
ts_DebtInstrumentsPercentContributedToFairValueOfPlanAssets
Debt instruments
The percent that instruments representing debt (rather than equity) constitute of the fair value of defined benefit plan assets.
Miscellaneous
ts_OtherCurrentMiscellaneousLiabilities
The amount of other current miscellaneous liabilities.
Payroll and social security payable
ts_CurrentEmployeeRelatedLiabilities
The amount of current employee related liabilities.
Disclosure of detailed information about investments in non-consolidated companies [text block]
The disclosure of detailed information about investments in non-consolidated companies.
Available for sale assets
ifrs-full_NoncurrentFinancialAssetsAvailableforsale
Non-current financial assets available-for-sale
Disclosure of detailed information about selected financial information [text block]
The disclosure of detailed information about selected financial information.
Disclosure of employee benefits [text block]
Other [member]
Information related to other non-consolidated companies.
ifrs-full_PercentageOfEntitysRevenue
Percentage of entity's revenue
ts_ProvisionOfPartialGuaranteeOrCollateralByEntity
Provision of partial guarantee or collateral by entity
The amount of partial guarantees or collateral provided by the entity under a loan agreement.
Mexico, Pesos
Key management personnel of entity or parent [member]
Disclosure of geographical areas [text block]
Other related parties [member]
Categories of related parties [axis]
Total liabilities
Total liabilities
Income before income tax
Income before income tax
Profit (loss) before tax
Income before income tax
Impairment charge
ifrs-full_ImpairmentLossRecognisedInProfitOrLoss
Impairment loss recognised in profit or loss
Entity's total for related parties [member]
ts_AmountOfLoanPartiallyGuaranteed
Amount of loan partially guaranteed
Represents the amount of the loan that is partially guaranteed.
ifrs-full_InterestRevenueExpense
Interest accruals less payments, net
Disclosure of deferred tax assets and liabilities [text block]
The disclosure of deferred tax assets and liabilities.
Entity's total for segment consolidation items [member]
Elimination of intersegment amounts [member]
Subsidiary loans [member]
Represents information related to loans made to subsidiaries.
Disclosure of operating segments [text block]
Segment consolidation items [axis]
ts_TransportationCapacityAgreementPurchasingCapacityOfNaturalGasPerDay
Transportation capacity agreement, purchasing capacity of natural gas per day
Represents the amount of purchasing capacity of MMBtu/Gas per day under a transportation capacity agreement.
Deferred tax liabilities, fixed assets [member]
This member stands for deferred tax liability attributable to taxable temporary differences from fixed assets.
Disclosure of entity's operating segments [text block]
Deferred tax liabilities, intangible and other assets [member]
This member stands for deferred tax liability attributable to taxable temporary differences from intangible assets and other assets.
ts_ProvisionForExposureToPurchaseAndOtherServiceAgreements
Provision for exposure to purchase and other service agreements
Represents the amount of exposure related to contracts for the purchase of power generation equipment and other services related to the equipment.
Deferred tax liabilities, inventory [member]
This member stands for deferred tax consequences attributable to taxable temporary differences derived from inventory.
ts_ProvisionForExposureToTransportationCapacityAgreements
Provision for exposure to transportation capacity agreements
Represents the amount of exposure risk from transportation capacity agreements.
Disclosure of detailed information about principal non-consolidated companies [text block]
The disclosure of detailed information about principal non-consolidated companies.
Deferred tab liabilities [member]
This member stands for deferred tax liabilities.
Non-adjusting events after reporting period [axis]
Deferred tax assets [member]
This member stands for deferred tax assets.
Transfer to assets held for sale
The increase (decrease) in deferred tax liability (asset) resulting from transfer to assets held for sale.
Non-adjusting events after reporting period [member]
Deferred tax assets, inventory [member]
This member stands for deferred tax asset attributable to deductible temporary differences from inventory.
Deferred tax assets, provisions and allowances [member]
This member stands for deferred tax asset attributable to deductible temporary differences from provisions and allowances.
Deferred tax assets, other [member]
This member stands for deferred tax asset attributable to deductible temporary differences, classified as other.
Deferred tax assets, tax loss [member]
This member stands for deferred tax asset attributable to deductible temporary differences from tax loss.
Disclosure of events after reporting period [text block]
Disclosure of recovery analysis of deferred tax assets and liabilities [text block]
The disclosure of recovery analysis of deferred tax assets and liabilities.
Euro Member Countries, Euro
Deferred tax [text block]
The disclosure of deferred tax.
Disclosure of detailed information about the estimated useful lives of property, plant and equipment [text block]
The disclosure of detailed information about the estimated useful lives of property, plant and equipment.
Equity in accordance with Luxembourg law [member]
Represents equity in accordance with Luxembourg law.
Disclosure of detailed information about distributable retained earnings [text block]
The disclosure of detailed information about distributable retained earnings.
Translation differences
ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
ts_NetDefinedContributionPlanLiabilityAssetAtEndOfPeriod
Net defined contribution plan liability (asset) at end of period
The amount of deficit or surplus in a defined contribution plan, adjusted for any effect of limiting a net defined contribution asset to the asset ceiling.
Disclosure of detailed information about equity if different from the financial statements [text block]
The disclosure of detailed information about equity if different from the financial statements.
Companhia Siderúrgica Nacional [member]
The entity Companhia Siderúrgica Nacional.
ts_TagalongTenderOfferToNoncontrollingInterests
Tag-along tender offer to non-controlling interests
The required tag-along tender offer to non-controlling interests in an acquisition.
Income statement credit (charge)
ts_DistributableRetainedEarnings
Distributable retained earnings
Distributable amount at December 31, 2017 under Luxembourg law
A component of equity representing the entity's cumulative distributable retained earnings.
ts_TagalongTenderOfferToNoncontrollingInterestsPercentage
Tag-along tender offer to non-controlling interests, percentage
The required Tag-along tender offer to non-controlling interests in an acquisition expressed as a percentage of the price per share paid in such acquisition.
ts_ExpectedDecreaseInAllowanceForDoubtfulAccounts
Expected decrease in allowance for doubtful accounts
The amount expected to decrease in allowance for doubtful accounts related the adoption of IFRS 9.
ts_ExpectedNetIncreaseDecreaseInRevenuesCostOfSalesAndSellingExpensesFromAdoptionOfAPolicy
Expected net increase (decrease) in revenues, cost of sales and selling expenses from adoption of a policy
The expected net increase (decrease) in revenues, cost of sales and selling expenses from adoption of a policy.
Acquisition and other changes in non-controlling interests
ts_TagalongTenderOfferToNoncontrollingInterestsShares
Tag-along tender offer to non-controlling interests, shares
The required tag-along tender offer to non-controlling interests in an acquisition expressed in shares.
ts_TagalongTenderOfferToNoncontrollingInterestsContingentLiability
Tag-along tender offer to non-controlling interests, contingent liability
The percentage of the tag-along tender offer to non-controlling interests accounted for as a contingent liability.
Veracel Celulose S.A. [member]
The entity Veracel Celulose S.A.
Petroamazonas [member]
The entity Petroamazonas.
Retrospective changes applied after the reporting period [member]
Refers to information regarding retrospective changes applied after the reporting period.
Italian tax authorities [member]
Represents the Italian tax authorities.
Itaú Seguros S.A. [member]
The entity Itaú Seguros S.A.
Total comprehensive income (loss) for the year
Total comprehensive income (loss) for the year
Total comprehensive income (loss) for the year
Other comprehensive income for the year
Other comprehensive income (loss) for the year, net of tax
ifrs-full_DividendsPaid
Dividends recognised as distributions to owners
Dividends paid in cash
Disclosure of detailed information about weighted average interest rates of borrowings [text block]
The disclosure of detailed information about weighted average interest rates of borrowings.
Disclosure of detailed information of the hedge reserve evolution [text block]
The disclosure of detailed information of the hedge reserve evolution.
Disclosure of detailed information about the maturity of borrowings [text block]
The disclosure of detailed information about the maturity of borrowings.
Disclosure of detailed information about significant borrowings [text block]
The disclosure of detailed information about significant borrowings.
Acquisition
Amendment Flag
Difference in cost of sales
ts_ManagementViewDifferencesInCostOfSales
Differences in cost of sales under management view.
Absorption
ts_ManagementViewDifferencesInAbsorption
Differences in absorption under management view.
Differences in selling, general and administrative expenses
ts_ManagementViewDifferencesInSellingGeneralAndAdiministrativeExpenses
Differences in selling, general and administrative expenses under management view.
Direct cost and others
ts_DifferencesInDirectCostsAndOthersUnderManagementView
Differences in direct costs and others under management view.
ifrs-full_TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets
Transfers out of Level 2 into Level 1 of fair value hierarchy, assets held at end of reporting period
Differences in other operating income (expenses), net
ts_ManagementViewDifferencesInOtherOperatingIncomeExpensesNet
Differences in net other operating income (expenses) under management view.
Current Fiscal Year End Date
ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets
Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period
Disclosure of fair value measurement of assets [text block]
Document Fiscal Period Focus
Document Fiscal Year Focus
ifrs-full_DecreaseThroughClassifiedAsHeldForSaleGoodwill
Decrease through classified as held for sale, goodwill
ifrs-full_DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsAndGoodwill
Transfer to assets held for sale
Document Period End Date
ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill
Transfers / Reclassifications
Document Type
ifrs-full_DisposalsIntangibleAssetsAndGoodwill
Disposals
Document Information [Line Items]
Document Information [Table]
Disclosure of finance income (cost) [text block]
Entity Filer Category
Entity Current Reporting Status
ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
Translation differences
Entity Voluntary Filers
Entity Well-known Seasoned Issuer
Entity Central Index Key
Entity Registrant Name
Entity [Domain]
Legal Entity [Axis]
Entity Common Stock, Shares Outstanding (in shares)
ifrs-full_OtherExpenseByFunction
Other operating expenses
Other operating income
ifrs-full_IncomeTaxExpenseContinuingOperations
Tax charge
Income tax
Trading Symbol
ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset
Benefits paid from the plan
ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
Other
ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset
Contributions paid to the plan
ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
Translation differences
Translation differences
ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
Return on plan assets
ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
Remeasurements (*)
ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset
Current service cost
ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
Interest cost
Interest accrued
Continuing operations
Discontinued operations:
Continuing and discontinued operations
Disclosure of financial instruments by type of interest rate [text block]
Reclassifications
Transfer to held for sale
Income before equity in earnings of non-consolidated companies and income tax
ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax
Income (loss) before equity in earnings of non-consolidated companies and income tax
The (loss) income before equity in earnings of non-consolidated companies and income tax.
Basic and diluted earnings (losses) per ADS (U.S. dollars per ADS) (*) (in dollars per share)
The amount of Basic and diluted earnings (losses) per ADS from continuing operations. Each ADS equals two shares.
ts_BasicAndDilutedEarningsLossesPerAds
Basic and diluted earnings (losses) per ADS (U.S. dollars per ADS) (*) (in dollars per share)
The amount of Basic and diluted earnings (losses) per ADS. Each ADS equals two shares.
Translation differences
Translation differences
- Changes in the fair value of derivatives held as cash flow hedges and others
The amount of other comprehensive income, before tax, attributable to non-consolidated companies related to derivatives held as cash flow hedges and others.
ts_ComprehensiveIncomeFromContinuingOperations
Continuing operations
The amount of change in equity from continuing operations resulting from transactions and other events, other than those changes resulting from transactions with owners in their capacity as owners.
Share of other comprehensive income of non-consolidated companies:
ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies
- Currency translation adjustment
Translation differences
The amount of other comprehensive income (loss), before tax, attributable to non-consolidated companies related to exchange differences when financial statements of foreign operations are translated
Used
Used
ifrs-full_DisposalsAndRetirementsPropertyPlantAndEquipment
Disposals / Consumptions
ts_ComprehensiveIncomeFromDiscontinuedOperations
Discontinued operations
The amount of change in equity from discontinued operations resulting from transactions and other events, other than those changes resulting from transactions with owners in their capacity as owners.
Total comprehensive income (loss) for the year attributable to Owners of the parent arises from
ifrs-full_DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment
Transfer to assets held for sale
Transfers / Reclassifications
ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
ifrs-full_IncreaseDecreaseInFinancialAssetsArisingFromChangeInMeasurementAttributeFirstApplicationOfIFRS9
Increase (decrease) in financial assets arising from change in measurement attribute, initial application of IFRS 9
Depreciation charge
ifrs-full_DepreciationPropertyPlantAndEquipment
Translation differences
ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
Translation differences, noncurrent
The increase (decrease) in the non-current portion of non-current borrowings resulting from translation differences.
Translation differences, current
The increase (decrease) in the current borrowings and current portion of non-current borrowings resulting from translation differences.
Interests Accrued less payments, noncurrent
The increase (decrease) in the non-current portion of non-current borrowings resulting from interests accrued net of payments.
Interests Accrued less payments, current
The increase (decrease) in the non-current portion of non-current borrowings resulting from interests accrued net of payments.
Proceeds and repayments, net, noncurrent
The increase (decrease) in the non-current portion of non-current borrowings resulting from net proceeds and repayments.
Proceeds and repayments, net, current
The increase (decrease) in the total current borrowings and current portion of non-current borrowings resulting from net proceeds and repayments.
Other Movements, noncurrent
The increase (decrease) in the non-current portion of non-current borrowings resulting from other movements.
Other Movements, current
The increase (decrease) in the total current borrowings and current portion of non-current borrowings resulting from other movements.
Reclassifications, noncurrent
The increase (decrease) in the non-current portion of non-current borrowings resulting from reclassifications.
Reclassifications, current
The increase (decrease) in the total current borrowings and current portion of non-current borrowings resulting from reclassifications.
Disclosure of borrowings evolution [text block]
The entire disclosure for borrowings changes.
Overdrafts variation, noncurrent
The increase (decrease) in the non-current portion of non-current borrowings resulting from overdrafts variation.
Overdrafts variation, current
The increase (decrease) in the current borrowings and current portion of non-current borrowings resulting from overdrafts variation.
Changes in tax rates or tax laws enacted or announced [member]
Trademarks [member]
Refers to information regarding trademarks.
Customer-related intangible assets [member]
ts_WriteDownsFairValueMeasurementAssets
Decrease due to write down
The decrease in the fair value measurement of assets resulting from write downs.
ts_CurrencyTranslationAdjustmentAndOthersFairValueMeasurementAssets
Currency translation adjustment and others
The increase (decrease) in the fair value measurement of assets resulting from currency translation adjustments and others.
Construction in progress [member]
Industrial buildings, plant and production equipment [member]
Refers to information regarding the industrial buildings, plant and production equipment.
Land and civil buildings [member]
Refers to information regarding land and civil buildings.
Decrease / increase in equity reserves and others
The entity's share of the other comprehensive income of associates and joint ventures accounted for using the equity method, including dividends declared, net of tax.
Property, plant and equipment [member]
Derivatives [member]
Assets [member]
Goodwill [member]
Classes of assets [axis]
Legal proceedings contingent liability [member]
Currency translation adjustment [member]
Represents currency translation adjustment.
Legal reserves [member]
Represents legal reserves.
Classes of contingent liabilities [axis]
Contingent liabilities [member]
Goods in process
Financial guarantee contracts [member]
Classes of financial instruments [axis]
Financial instruments, class [member]
Intangible assets and goodwill [member]
Classes of intangible assets and goodwill [axis]
Movement in cash and cash equivalents
Goods in transit
ts_PropertyPlantAndEquipmentCapitalizedInterest
Property, plant and equipment, capitalized interest
The amount of capitalized interest included in property, plant and equipment.
ts_PropertyPlantAndEquipmentCapitalizedInterestRate
Property, plant and equipment, capitalized interest rate
The average capitalization interest rates applied to property, plant and equipment during the period.
Finished goods
Supplies
Spare parts and equipment [member]
This member stands for a class of property, plant and equipment representing spare parts and equipment used in the entity's operations.
Raw materials
Vehicles, furniture and fixtures [member]
This member stands for a class of property, plant and equipment representing vehicles and furniture and fixtures used in the entity's operations.
Liabilities [member]
Classes of liabilities [axis]
Values at the beginning of the year
Values at the end of the year
ifrs-full_OtherProvisions
Other provisions at end of period
Values at the beginning of the year
Values at the end of the year
Management view - operating income
ts_ManagementViewOperatingIncome
Operating income under management view.
Tubes [member]
Segment classified as "Tubes".
ts_AggregateCashPaymentsForLegalSettlements
Aggregate cash payments for legal settlements
The aggregate amount of cash payments for legal settlements.
Differences in depreciation and amortization
ts_ManagementViewDifferencesInDepreciationAndAmortization
Differences in depreciation and amortization under management view.
ts_CashPaymentsDuringLegalProceedings
Cash payments during legal proceedings
The amount of cash payments made during legal proceedings when no settlement was yet made.
Disclosure of financial instruments [text block]
From discontinued operations
The amount of income or cost associated with interest and other financing activities of the entity attributable to discontinued operations.
One percent change, Argentine Peso / U.S. dollar foreign exchange risk [member]
Represents a one percent change in Argentine Peso / U.S. dollar foreign exchange risk.
ts_EstimatedPercentageOfLostProfits
Estimated percentage of lost profits
The percentage estimated for lost profits.
ts_ExcessAmountProvisionedForEstimatedFinancialEffectOfContingentLiabilities
Excess amount provisioned for estimated financial effect of contingent liabilities
The excess amount provisioned for the estimated financial effect of contingent liabilities.
ts_TermOfSupplyContract
Term of supply contract
The term of a supply contract.
Disclosure of auditor's remuneration [text block]
The disclosure of auditor's remuneration.
Fair value of funded post-employment benefits [member]
This member stands for the fair value of funded post-employment benefits.
Audit-related fees
The amount of fees paid or payable to the entity's auditors for other audit-related fees.
One percent change, Euro / U.S. dollar foreign exchange risk [member]
Represents a one percent change in Euro / U.S. dollar foreign exchange risk.
One percent change, U.S. dollar / Brazilian Real foreign exchange risk [member]
Represents a one percent change in U.S. dollar / Brazilian Real foreign exchange risk.
Miscellaneous other provisions [member]
Classes of property, plant and equipment [axis]
Disclosure of general and administrative expense [text block]
Tax accrued
ts_IncomeTaxesAccruedIncludingPortionOfSaleOfDiscontinuedOperations
The amount of income taxes accrued, including portion related to the sale of discontinued operations.
Other provisions [member]
Disclosure of general information about financial statements [text block]
Classes of other provisions [axis]
Share capital [member]
Classes of share capital [axis]
Transportadora de Gas del Norte S.A. [member]
Refers to information regarding Transportadora de Gas del Norte S.A.
Preference shares [member]
Voest Alpine Grobblech Gmb [member]
Refers to the company called Voest Alpine Grobblech Gmb.
Praxair S.A. [member]
Refers to information regarding the company Praxair S.A.
Graftech [member]
Refers to information regarding the company Graftech.
Tubos de Acero de México S.A and Servicios Generales Tenaris Tamsa S.A. [member]
Refers to information regarding the entities Tubos de Acero de México S.A and Servicios Generales Tenaris Tamsa S.A.
Mexican tax authorities [member]
Refers to information regarding the Mexican tax authorities.
Investment [Axis]
Non-controlling interests [member]
Retained earnings [member]
Investment [Domain]
ts_NumberOfAllegedInaccurateCurrencyExchangeDeclarations
Number of alleged inaccurate currency exchange declarations
The number of alleged inaccurate currency exchange declarations.
Cash-generating units [axis]
ts_AmountAllegedInaccurateForTheExportOfGoods
Amount alleged inaccurate for the export of goods
The amount alleged inaccurate for the export of goods.
Contractor [member]
Refers to information regarding a contractor.
Entity's total for cash-generating units [member]
Argentine state-owned company [member]
Refers to a company in Argentina owned by the state.
Share premium [member]
ts_LossContingencyMultipleOfFineApplicationPossible
Loss contingency, multiple of fine application possible
The multiple of fine application to the value alleged in a legal proceeding.
Other reserves [member]
Disclosure of information for cash-generating units [text block]
Equity [member]
Garrett [member]
Refers to information regarding the entity Garrett.
Components of equity [axis]
Issued capital [member]
Equity attributable to owners of parent [member]
Cash received
The gross cash inflow from the disposal of non-current assets or disposal groups classified as held for sale and discontinued operations.
Change in value of available for sale financial instruments and cash flow hedges net of tax
Disclosure of discontinued operations net income components [text block]
The disclosure of discontinued operations net income components.
ts_NetAssetsSoldInDisposalCarryingAmount
Carrying amount of net assets sold
The amount of net assets sold during the period in a disposal at carrying value.
ts_TransactionAndOtherCostsRelatedToDisposalsOfDiscontinuedOperations
Transaction and other costs
The amount of transaction and other costs related to disposals of discontinued operations.
Gain on sale before income tax
The gross gain (loss) recognised on the measurement to fair value less costs to sell or on the disposal of the assets or disposal group(s) constituting the discontinued operation.
ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
Currency translation adjustment
Changes in the tax rates
Currency translation adjustment
Items that may be subsequently reclassified to profit or loss:
Accrual / Utilization of previously unrecognized tax losses
Remeasurements of post employment benefit obligations
Tax calculated at the tax rate in each country
Remeasurements of post employment benefit obligations, net of taxes
Items that will not be reclassified to profit or loss:
Non-controlling interests
ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests
Investment Securities Class [Axis]
Investment Securities Class [Domain]
Owners of the parent
Total comprehensive income for the year, net of tax, attributable to owners of the parent
Total comprehensive income (loss) for the year attributable to:
ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
Unused tax losses for which no deferred tax asset recognised
ifrs-full_TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
Income tax
ifrs-full_TaxExpenseRelatingToGainLossOnDiscontinuance
Income tax expense on gain
Significant borrowings as of closing date [member]
Refers to information regarding significant borrowings as of closing date.
Disclosure of income tax [text block]
Continuing and discontinued operations [axis]
Disclosure of sale of discontinued operations [text block]
The complete disclosure of the sale of discontinued operations.
TENARIS CONNECTIONS BV [member]
The entity TENARIS CONNECTIONS BV.
PRUDENTIAL STEEL LTD. [member]
The entity PRUDENTIAL STEEL LTD.
ifrs-full_CostOfSales
Cost of sales
Dividends proposed after the reporting period [member]
Refers to information regarding dividends proposed after the reporting period.
ts_NationalizationOfSubsidiariesCompensationAwardPostawardInterest
Nationalization of subsidiaries, compensation award post-award interest
The amount of post-award interest for compensation for the nationalization of subsidiaries.
Counterparties [axis]
ts_GovernanceCovenantTermOfAgreementForTheNominationOfCEOAndChairman
Governance covenant, term of intervals for the nomination of CEO and Chairman
The term of intervals in a governance agreement for the nomination of CEO and Chairman.
Ternium Investments S.à r.l. and Nippon Steel & Sumitomo Metal Corporation [member]
Refers to information regarding the entities Ternium Investments S.à r.l. and Nippon Steel & Sumitomo Metal Corporation.
Counterparties [member]
ts_GovernanceCovenantTotalNumberOfMembersInTheExecutiveBoard
Governance covenant, total number of members in the executive board
The total number of members in the executive board required for the governance agreement to operate.
ts_GovernanceCovenantTotalNumberOfVicepresidentsInTheExecutiveBoard
Governance covenant, total number of Vice-Presidents in the executive board
The total number of Vice-Presidents in the executive board required in a governance agreement.
ts_GovernanceCovenantNumberOfConsecutiveYearsInAnIntervalForTheNominationOfCEOandChairman
Governance covenant, number of consecutive years in an interval for the nomination of CEO and Chairman
The number of consecutive years in an interval for the nomination of CEO and Chairman in a governance agreement.
ts_GovernanceCovenantTermOfConsecutiveYearsInAnIntervalForTheNominationOfCeoAndChairman
Governance covenant, term of consecutive years in an interval for the nomination of CEO and Chairman
The term of consecutive years in an interval for the nomination of the CEO and Chairman in a governance agreement.
ts_RestructuringCovenantNumberOfAllowedNominationsPerAssociate
Restructuring covenant, number of allowed nominations per associate
The number of allowed nominations per associate in a restructuring covenant.
ts_GovernanceCovenantMinimumTermOfHoldingForCurrentShareholdersToExerciseInABuyandsellProcedure
Governance covenant, minimum term of holding for current shareholders to exercise in a buy-and-sell procedure
The minimum term of holding for current shareholders to exercise in a buy-and-sell procedure for a governance agreement.
ifrs-full_CreditExposure
Credit exposure
Unfunded defined benefit employee retirement plan for certain senior officers [member]
Refers to the unfunded defined benefit employee retirement plan for certain senior officers.
ts_TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesAndDiscontinuanceOfDiscontinuedOperations
From discontinued operations
The tax expense relating to the profit (loss) arising from ordinary activities of discontinued operations and on the tax expense relating to the gain (loss) on discontinuance when operations are discontinued.
Customer advances
Derivative financial instruments
ifrs-full_CurrentDerivativeFinancialLiabilities
Other investments - current
Other investments
Liabilities of disposal group classified as held for sale
Total liabilities of disposal group classified as held for sale
ifrs-full_CurrentProvisions
Provisions
Current tax liabilities
Trade payables
Intangible assets, net
Intangible assets and goodwill at end of period
Values at the beginning of the year
Values at the end of the year
Current liabilities:
Disclosure of reconciliation of changes in intangible assets and goodwill [text block]
V.A.T. liabilities
North America [member]
Continent of North America.
South America [member]
Continent of South America.
ifrs-full_RemainingAmortisationPeriodOfIntangibleAssetsMaterialToEntity
Remaining amortisation period of intangible assets material to entity
Asia Pacific [member]
Region of Asia Pacific.
Unallocated region [member]
Represents an unallocated region.
Europe [member]
Continent of Europe.
Receivables and prepayments, net
Middle East and Africa [member]
Regions of the Middle East and Africa.
V.A.T. credits
Hydrill acquisition [member]
Represents the Hydrill acquisition.
OCTG (USA) [member]
The cash generating unit OCTG (USA).
Maverick acquisition [member]
Represents the Maverick acquisition.
Current tax
Trade receivables, net
Current trade receivables
Net Value
Hydril [member]
The cash generating unit Hydril.
Coiled Tubing [member]
The cash generating unit Coiled Tubing.
Disclosure of intangible assets [text block]
Tamsa (Hydril and other) [member]
The cash generating unit Tamsa (Hydril and other).
Siderca (Hydril and other) [member]
The cash generating unit Siderca (Hydril and other).
Information system projects [member]
Intangible assets classified as information system projects.
Licenses, patents and trademarks [member]
Intangible assets classified as licenses, patents and trademarks.
Other CGU [member]
The cash generating unit classified as other.
ts_InventoriesAllowanceForObsolescence
Allowance for obsolescence (see Note 23 (i))
The amount of the allowance for obsolescence for inventories.
Disclosure of detailed information about inventories [text block]
The disclosure of detailed information about inventories.
ts_InventoriesGross
Amount of inventories before allowance for obsolescence.
ifrs-full_DeferredTaxLiabilityAsset
At the beginning of the year
At the end of the year
Deferred tax
Deferred tax liabilities to be recovered after 12 months
Deferred tax liabilities
ifrs-full_DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
Deferred tax expense (income) relating to tax rate changes or imposition of new taxes
Disclosure of interests in subsidiaries [text block]
ifrs-full_DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
Deferred tax expense (income) relating to origination and reversal of temporary differences
Disclosure of interests in other entities [text block]
ifrs-full_DefinedBenefitObligationAtPresentValue
Present value of funded obligations
Defined benefit plans [member]
Defined benefit plans [axis]
ifrs-full_DividendsPaidOrdinarySharesPerShare
Dividends paid, ordinary shares per share
Increase (decrease) due to application of IFRS 15 [member]
Disclosure of detailed information about cost of sales [text block]
The disclosure of detailed information about cost of sales.
Services and fees
Amount of services and fees expense attributable to cost of sales.
Increase (decrease) due to changes in accounting policy [member]
Raw materials, energy, consumables and other
Amount of raw materials, energy, consumables and other expense attributable to cost of sales.
Amortization of intangible assets
Amount of amortization of intangible assets attributable to cost of sales.
Maintenance expenses
Amount of maintenance expenses attributable to cost of sales.
Labor cost
Amount of labor cost attributable to cost of sales.
Disclosure of inventories [text block]
Currently stated [member]
Depreciation of property, plant and equipment
Amount of depreciation of property, plant and equipment attributable to cost of sales.
Other
ts_CostOfSalesOther
Amount of other expense attributable to cost of sales.
ts_CostOfSalesIncludingDiscontinuedOperations
Amount of cost of sales including discontinued operations.
Allowance for obsolescence
Amount of allowance for obsolescence attributable to cost of sales.
Taxes
Amount of tax expense attributable to cost of sales.
Disclosure of detailed information about selling, general and administrative expenses [text block]
The disclosure of detailed information about selling, general and administrative expenses.
ts_SellingGeneralAndAdministrativeExpensesServicesAndFees
Services and fees
Amount of services and fees attributable to selling, general and administrative expenses.
ts_InventoriesIncludingDiscontinuedOperations
Less: Inventories at the end of the year (*)
The amount of current inventories including discontinued operations.
ts_CostOfSalesDiscontinuedOperations
From discontinued operations
Amount of expense attributable to cost of sales from discontinued operations.
ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets
Amortization of intangible assets
Amount of amortization of intangible assets attributable to selling, general and administrative expenses.
ifrs-full_DerivativeFinancialLiabilities
Derivatives with with negative fair values
ts_SellingGeneralAndAdministrativeExpensesCommissionsFreightAndOtherSellingExpenses
Commissions, freight and other selling expenses
Amount of commissions, freight and other selling expenses attributable to selling, general and administrative expenses.
Derivatives with with positive fair values
ts_SellingGeneralAndAdministrativeExpensesLaborCost
Labor cost
Amount of labor cost attributable to selling, general and administrative expenses.
ts_SellingGeneralAndAdministrativeExpensesDepreciationOfPropertyPlantAndEquipment
Depreciation of property, plant and equipment
Amount of depreciation of property, plant and equipment attributable to selling, general and administrative expenses.
ts_TotalExcessCostOfProject
Total excess cost of project
The total excess cost of a project.
ts_SellingGeneralAndAdministrativeExpensesTaxes
Taxes
Amount of taxes attributable to selling, general and administrative expenses.
ts_SellingGeneralAndAdministrativeExpensesOther
Other
Amount of other expenses attributable to selling, general and administrative expenses.
ts_SellingGeneralAndAdministrativeExpensesProvisionsForContingencies
Provisions for contingencies
Amount of provisions for contingencies attributable to selling, general and administrative expenses.
ts_SellingGeneralAndAdministrativeExpensesAllowancesForDoubtfulAccounts
Allowances for doubtful accounts
Amount of allowances for doubtful accounts attributable to selling, general and administrative expenses.
ts_PurchaseCommitments
Purchase commitments
The amount liable for purchase commitments.
ts_SellingGeneralAndAdministrativeExpensesIncludingDiscontinuedOperations
Amount of selling, general and administrative expenses including discontinued operations.
ts_SellingGeneralAndAdministrativeExpensesDiscontinuedOperations
From discontinued operations
Amount of selling, general and administrative expenses attributable to discontinued operations.
ts_EmployeeBenefitsExpenseDiscontinuedOperations
From discontinued operations
Amount of employee benefits expense attributable to discontinued operations.
Disclosure of detailed information about labor costs [text block]
The disclosure of detailed information about labor costs.
Disclosure of investments accounted for using equity method [text block]
ts_EmployeeBenefitsExpenseIncludingDiscontinuedOperations
The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment. Includes discontinued operations.
Description of accounting policy for borrowings [text block]
Other geographical areas [member]
Geographical areas not otherwise defined.
Description of accounting policy for employee benefits [text block]
Description of accounting policy for earnings per share [text block]
Description of accounting policy for expenses [text block]
Description of accounting policy for financial instruments [text block]
Disclosure of detailed information about other operating income and expenses [text block]
The disclosure of detailed information about other operating income and expenses.
Description of accounting policy for foreign currency translation [text block]
Other operating income:
Other operating expenses:
ts_OtherOperatingExpenseDiscontinuedOperations
From discontinued operations
Amount of other operating expense attributable to discontinued operations.
ts_OtherExpenseIncludingDiscontinuedOperations
Amount of other expense including discontinued operations.
Description of accounting policy for impairment of non-financial assets [text block]
Description of accounting policy for intangible assets and goodwill [text block]
Description of accounting policy for investments other than investments accounted for using equity method [text block]
Description of accounting policy for investment in associates and joint ventures [text block]
Description of accounting policy for measuring inventories [text block]
Description of accounting policy for issued capital [text block]
Description of accounting policy for non-current assets or disposal groups classified as held for sale and discontinued operations [text block]
Allowance for doubtful receivables
ts_OtherOperatingExpensesAllowanceForDoubtfulReceivables
Amount of other operating expenses attributable to allowance for doubtful receivables.
Description of accounting policy for property, plant and equipment [text block]
Provisions for legal claims and contingencies
ts_OtherOperatingExpensesProvisionsForLegalClaimsAndContingencies
Amount of other operating expenses attributable to provisions for legal claims and contingencies.
After tax gain on the sale of Conduit
Gain (loss) recognised on measurement to fair value less costs to sell or on disposal of assets or disposal groups constituting discontinued operation
Gain on sale after income tax
Description of accounting policy for recognition of revenue [text block]
ifrs-full_ProfitLossBeforeTaxDiscontinuedOperations
Income before income tax
Description of accounting policy for provisions [text block]
Disclosure of non-current assets held for sale and discontinued operations [text block]
Net rents
ts_OtherOperatingIncomeNetRents
Amount of other operating income attributable to net rents.
Description of accounting policy for segment reporting [text block]
Contributions to welfare projects and non-profits organizations
ts_OtherOperatingExpenseContributionsToWelfareProjectsAndNonprofitsOrganizations
Amount of other operating expense attributable to contributions to welfare projects and non-profits organizations.
Net income from other sales
ts_OtherOperatingIncomeNetIncomeFromOtherSales
Amount of other operating income attributable to net income from other sales.
ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share
ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare
Dividends recognised as distributions to owners per share
Description of accounting policy for trade and other receivables [text block]
Disclosure of detailed information about current allowances and provisions deducted from assets [text block]
The disclosure of detailed information about current allowances and provisions deducted from assets.
Allowance for doubtful accounts - trade receivables [member]
Represents the allowance for doubtful accounts attributable to trade receivables.
Disclosure of current allowances and provisions [text block]
The disclosure of current allowances and provisions.
Description of accounting policy for trade and other payables [text block]
ts_IncreaseDecreaseThroughReversalsAndAdditionalAllowances
Reversals / (additional) allowances
The increase (decrease) through reversals and (additional) allowances.
Sales risks [member]
Represents the sales risks provision.
Allowance for other doubtful accounts - other receivables [member]
Represents the allowance for other doubtful accounts attributable to other receivables.
Allowance for inventory obsolescence [member]
Represents the allowance for inventory obsolescence.
Disclosure of significant accounting policies [text block]
Description of accounting policy for determining components of cash and cash equivalents [text block]
Disclosure of detailed information about current allowances and provisions from liabilities [text block]
The disclosure of detailed information about current allowances and provisions from liabilities.
Disclosure of detailed information about non-current allowances and provisions deducted from non-current receivables [text block]
The disclosure of detailed information about non-current allowances and provisions deducted from non-current receivables.
Provision for current liabilities [member]
Represents the provision for current liabilities.
Disclosure of non-current allowances and provisions [text block]
The disclosure of non-current allowances and provisions.
Non-current allowance for receivables [member]
Represents the non-current allowance for receivables.
Disclosure of trade and other receivables [text block]
Disclosure of tax receivables and payables [text block]
Disclosure of detailed information about non-current allowances and provisions from liabilities [text block]
The disclosure of detailed information about non-current allowances and provisions from liabilities.
Provision for non-current liabilities [member]
Represents the provision for non-current liabilities.
Disclosure of detailed information about derivative financial instruments [text block]
The disclosure of detailed information about derivative financial instruments.
Accumulated depreciation, amortisation and impairment [member]
Fair value of derivatives
Total
The amount of financial assets (liabilities) classified as derivative instruments.
Foreign exchange derivatives contracts [member]
Represents foreign exchange derivatives contracts.
ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections
Discount rate applied to cash flow projections
ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred
Total consideration transferred, acquisition-date fair value
Foreign exchange contract, purchase currency EUR, sell currency USD [member]
Represents a foreign exchange contract where the purchase currency is EUR and the sell currency USD.
Foreign exchange contract, purchase currency USD, sell currency EUR [member]
Represents a foreign exchange contract where the purchase currency is USD and the sell currency EUR.
Foreign exchange contract, purchase currency MXN, sell currency USD [member]
Represents a foreign exchange contract where the purchase currency is MXN and the sell currency USD.
Foreign exchange contract, purchase currency USD, sell currency MXN [member]
Represents a foreign exchange contract where the purchase currency is USD and the sell currency MXN.
Foreign exchange contract, purchase currency USD, sell currency ARS [member]
Represents a foreign exchange contract where the purchase currency is USD and the sell currency ARS.
Foreign exchange contract, purchase currency ARS, sell currency USD [member]
Represents a foreign exchange contract where the purchase currency is ARS and the sell currency USD.
Foreign exchange contract, purchase currency JPY, sell currency USD [member]
Represents a foreign exchange contract where the purchase currency is JPY and the sell currency USD.
Foreign exchange contract, purchase currency USD, sell currency KWD [member]
Represents a foreign exchange contract where the purchase currency is USD and the sell currency KWD.
ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
Increase due to business combinations (**)
Foreign exchange contract, purchase currency USD, sell currency BRL [member]
Represents a foreign exchange contract where the purchase currency is USD and the sell currency BRL.
Foreign exchange contract, Other [member]
Represents a foreign exchange contract classified as other.
Increase due to business combinations (*)
Foreign exchange contract, purchase currency USD, sell currency GPB [member]
Represents a foreign exchange contract where the purchase currency is USD and the sell currency GBP.
Actuarial assumption of discount rates [member]
Discount rate
Rate of compensation increase
Actuarial assumption of expected rates of salary increases [member]
Actuarial assumptions [member]
Actuarial assumptions [axis]
ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
Remeasurements
ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
Actuarial losses (gains) arising from changes in demographic assumptions, net defined benefit liability (asset)
ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
Actuarial losses (gains) arising from changes in financial assumptions, net defined benefit liability (asset)
Disclosure of non-current receivables [text block]
The disclosure for non-current receivables.
ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
Growth rate used to extrapolate cash flow projections
ts_TradeAndOtherNoncurrentReceivablesBeforeTheAllowanceForDoubtfulAccounts
The amount of trade and other non-current receivables before the allowance for doubtful accounts.
Government entities
ts_NoncurrentReceivablesGovernmentEntities
The amount of non-current receivables from government entities.
Disclosure of detailed information about non-current receivables [text block]
The disclosure for detailed information about non-current receivables.
ts_TradeAndOtherNoncurrentReceivablesAllowanceForDoubtfulAccounts
Allowances for doubtful accounts (see Note 22 (i))
The allowance for doubtful accounts attributable to trade and other non-current receivables.
Sales of services to related parties
ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions
Employee advances and loans
ts_NoncurrentReceivablesEmployeeAdvancesAndLoans
The amount of non-current receivables from employee advances and loans.
Advances to suppliers and other advances
ts_NoncurrentReceivablesAdvancesToSuppliersAndOtherAdvances
The amount of non-current receivables from advances to suppliers and other advances.
Purchases of services to related parties
ifrs-full_PurchasesOfPropertyAndOtherAssetsRelatedPartyTransactions
Sales of goods to related parties
ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions
ARGENTINA
Purchases of goods to related parties
ifrs-full_PurchasesOfGoodsRelatedPartyTransactions
ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment
Key management personnel compensation, share-based payment
Disclosure of transactions between related parties [text block]
ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits
Key management personnel compensation, short-term employee benefits
Disclosure of related party [text block]
Additional provisions
BRAZIL
CANADA
Disclosure of property, plant and equipment [text block]
ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
Additions
Additions
ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
Disclosure of other non-current liabilities [text block]
Disclosure of other operating income (expense) [text block]
SWITZERLAND
Disclosure of other liabilities [text block]
Disclosure of other current liabilities [text block]
COLOMBIA
ifrs-full_DisclosureOfNotesAndOtherExplanatoryInformationExplanatory
Notes to Financial Statements
Inventories
ifrs-full_AdjustmentsForDecreaseIncreaseInInventories
Customer advances
ifrs-full_AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers
Trade receivables
ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense
Depreciation and amortization
UNITED KINGDOM
ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
Impairment charge
ifrs-full_AdjustmentsForIncomeTaxExpense
Income tax accruals less payments
Other liabilities
ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities
Trade payables
ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
Income from the sale of Conduit business
Maturity [axis]
INDONESIA
ifrs-full_AdjustmentsForProvisions
Changes in provisions
ifrs-full_EquityAndLiabilities
Total equity and liabilities
Currency translation adjustment and others
ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates
Equity in (earnings) losses of non-consolidated companies
ITALY
Adjustments for:
JAPAN
Continuing operations [member]
Aggregate continuing and discontinued operations [member]
Non-current liabilities:
Disposal groups classified as held for sale [member]
Provisions
Discontinued operations [member]
Legal reserve
Liabilities
Capital and reserves attributable to owners of the parent
Retained earnings including net income for the year ended December 31, 2017
Retained earnings at December 31, 2016 under Luxembourg law
Retained earnings at December 31, 2017 under Luxembourg law
Share capital
Share premium
Statement of financial position [abstract]
LUXEMBOURG
Later than five years [member]
Later than two years and not later than three years [member]
Later than four years and not later than five years [member]
Later than three years and not later than four years [member]
Later than one year [member]
Later than one year and not later than two years [member]
Not later than one year [member]
Aggregated time bands [member]
MEXICO
Level 3 of fair value hierarchy [member]
NETHERLANDS
All levels of fair value hierarchy [member]
ifrs-full_DividendPayables
Dividend payables
Level 2 of fair value hierarchy [member]
Level 1 of fair value hierarchy [member]
ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents
Effect of exchange rate changes
All other segments [member]
ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill
Amortization charge
ifrs-full_FinanceCosts
Finance Cost
Finance Income
Finance income
Gross profit
Gross profit
PORTUGAL
Attributable to:
Net income for the year attributable to owners of the parent
Owners of the parent
ROMANIA
IFRS - operating income
ifrs-full_ProfitLossFromOperatingActivities
Operating income
(Decrease) increase in cash and cash equivalents
Profit or loss [abstract]
ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
(Decrease) increase in cash and cash equivalents
Receivables from related parties
ifrs-full_AmountsReceivableRelatedPartyTransactions
ifrs-full_AmountsPayableRelatedPartyTransactions
Payables to related parties
Interest to be accrued (*)
ifrs-full_InterestReceivable
Interest receivable
UNITED STATES
URUGUAY
VENEZUELA
Charged directly to other comprehensive income
Effect of currency translation on tax base
ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss
Income tax relating to components of other comprehensive income
ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss
Income tax on items that will not be reclassified
Other liabilities
Other liabilities
Share of other comprehensive income of non-consolidated companies
Equity in losses of non-consolidated companies
Equity in earnings of non-consolidated companies
Other investments
Other investments - non-current
Remeasurements of post employment benefit obligations of non-consolidated companies
Other liabilities
ifrs-full_OtherNoncurrentLiabilities
Other liabilities
Cash and bank deposits
Cash at banks, liquidity funds and short - term investments
The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value as well as cash and cash equivalents are classified as a part of a disposal group.
ifrs-full_BasicAndDilutedEarningsLossPerShare
Basic and diluted earnings (losses) per share (in dollars per share)
Basic and diluted earnings per share (U.S. dollars per share), discontinued operations (in dollars per share)
Basic and diluted earnings (losses) per share (in dollars per share)
Ordinary shares [member]
Earnings per share attributable to the owners of the parent during the year:
Depreciation and amortization
Depreciation and amortization
ifrs-full_OtherLongtermBenefits
Employee retention and long term incentive program
Legal deposits
ifrs-full_NoncurrentPrepayments
ifrs-full_EmployeeBenefitsExpense
Defined contribution plans
ifrs-full_ShorttermEmployeeBenefitsExpense
Wages, salaries and social security costs
Others
ifrs-full_OtherNoncurrentReceivables
Severance indemnities
ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans
Pension benefits - defined benefit plans
Receivables from related parties
ifrs-full_NoncurrentReceivablesDueFromRelatedParties
Tax credits
ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax
ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
Dilutive effect of share options on number of ordinary shares
ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
Receivables C and NC
Receivables C and NC
ifrs-full_NumberOfEmployees
Number of employees
Disclosure of additional information [text block]
Retrospective application and retrospective restatement [axis]
Statement of cash flows [abstract]
Statement of comprehensive income [abstract]
Statement of changes in equity [abstract]
Liabilities with related parties
ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties
ifrs-full_SellingGeneralAndAdministrativeExpense
Selling, general and administrative expenses
Selling, general and administrative expenses
Other
ifrs-full_MiscellaneousOtherOperatingIncome
Other income and expenses for the year ended December 31, 2017
Other
ifrs-full_MiscellaneousOtherOperatingExpense
Receivables from related parties
Risks [member]
Types of risks [axis]
Financial income (expense), net
ifrs-full_FinanceIncomeCost
Other financial results
ifrs-full_DividendsClassifiedAsExpense
Dividends approved
ifrs-full_ResearchAndDevelopmentExpense
Research and development expense
Net income
Income from discontinued operations
Loss on fixed assets and material supplies disposed / scrapped
ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment
Disclosure of borrowings [text block]
Revenues
Net sales
IFRS - Net Sales
ifrs-full_PercentageOfVotingEquityInterestsAcquired
Percentage of voting equity interests acquired
Interest Income
ifrs-full_RevenueFromConstructionContracts
Revenue from construction contracts
Disclosure of business combinations [text block]
Disclosure of cash flow statement [text block]
Announcing or commencing implementation of major restructuring [member]
ifrs-full_ApplicableTaxRate
Applicable tax rate
Nominal value (in dollars per share)
Par value per share
ifrs-full_NumberOfSharesOutstanding
Number of shares outstanding at end of period
Cash and cash equivalents
Cash and cash equivalents
Shares issued (in shares)
Total number of shares issued
Total assets
Total assets
At the beginning of the year
At the end of the year
Authorized share capital (in shares)
Number of shares authorised
Deferred tax assets
Deferred tax assets
Deferred tax assets to be recovered after 12 months
Investments in non-consolidated companies
Value
Total investments in subsidiaries, joint ventures and associates
At the beginning of the year
At the end of the year
Disclosure of commitments and contingent liabilities [text block]
ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
Total assets of disposal group classified as held for sale
Assets of disposal group classified as held for sale
Goodwill
Goodwill at end of period
ifrs-full_Equity
Total equity
Balance
Balance
Current assets
Property, plant and equipment, net
Beginning of the year
End of the year
Inventories, net
Total current inventories
Current assets:
Current tax assets
Non-current assets
Receivables, net
Total trade and other non-current receivables
ifrs-full_FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished
Fair value of investments in associates for which there are quoted market prices
Non-current liabilities
Non-current assets:
Result for discontinued operations
Net Income for discontinued operations
ifrs-full_ProfitLossFromContinuingOperations
Income (loss) for continuing operations
Assets
ifrs-full_ProportionOfVotingPowerHeldInAssociate
Proportion of voting rights held in associate
Percentage of ownership
Proportion of ownership interest in associate
Associates [axis]
Entity's total for associates [member]
Current liabilities
Non-controlling interests
Associates [member]
ifrs-full_AuditorsRemuneration
Total
ifrs-full_ProfitLossAttributableToNoncontrollingInterests
Non-controlling interests
Percentage of ownership
ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Proportion of ownership interest in subsidiary
Audit fees
All other fees
Tax fees
Entity's total for subsidiaries [member]
Subsidiaries [axis]
Change in value of available for sale financial instruments
Disclosure of subsidiaries [text block]
ifrs-full_EstimatedFinancialEffectOfContingentLiabilities
Estimated financial effect of contingent liabilities
ifrs-full_BankAcceptanceLiabilities
Bank acceptance liabilities
Cash at banks
ifrs-full_BankOverdraftsClassifiedAsCashEquivalents
Bank overdrafts
Receivables and prepayments and Current tax assets
ts_AdjustmentsForIncreaseDecreaseInReceivablesAndPrepaymentsAndCurrentTaxAssets
Adjustments for increase (decrease) in receivables and prepayments and current tax assets to reconcile profit (loss) to net cash flow from (used in) operating activities.
Disclosure of detailed information about cash flow disclosures [text block]
The disclosure of detailed information about cash flow disclosures.
ts_IncomeTaxesAccrued
The amount of income taxes accrued.
Interest accruals less payments, net
Disclosure of cost of sales [text block]
Income tax accruals less payments
Past due status [axis]
Disclosure of detailed information about financial income (cost) [text block]
The disclosure of detailed information about financial income (cost). [Refer: Finance income (cost)]
Past due status [member]
San Faustin S.A. [member]
Represents San Faustin S.A.
Net result on changes in FV of financial assets at FVTPL
Represents the net financial income on changes in fair value of financial assets at fair value through profit os loss.
ts_UnitsIssuedRelatedPartyTransactions
Units issued, related party transactions
The number of units issued in a related party transaction.
ts_RevenueRelatedPartyTransactions
The amount of revenue arising from related party transactions.
Significant borrowings as of Closing Date
Borrowings C and NC
Total borrowings
Total Borrowings
Borrowings
At the beginning of the year, current
At the end of the year, current
ts_AmountsReceivablePayableRelatedPartyTransactions
The amounts receivable (payable) resulting from related party transactions.
ts_PurchasesOfGoodsAndServicesRelatedPartyTransactions
The amount of purchases of goods and services in related party transactions.
ts_FinanceIncomeCostContinuingOperations
Net financial results
The amount of income or cost associated with interest and other financing activities of the entity attributable to continuing operations.
ts_FinitelivedIntangibleAssetUsefulLife
Finite-lived intangible asset, useful life
Represents the useful life of finite-lived intangible assets.
ifrs-full_LongtermBorrowings
Borrowings
At the beginning of the year, noncurrent
At the end of the year, noncurrent
ts_OtherFinancialIncomeCost
Other financial results
The amount of other income (cost) associated with interest and other financing activities of the entity.
Borrowings by name [member]
Other
The amount of income or cost associated with foreign exchange.
Licenses, patents, trademarks, and proprietary technology [member]
Information related to licenses, patents, trademarks, and proprietary technology.
Borrowings by name [axis]
Foreign exchange derivatives contracts results (**)
The amount of income or cost associated with foreign exchange derivatives contracts.
Net foreign exchange transactions results (*)
The amount of net income or cost associated with foreign exchange transactions.
HYDRIL COMPANY and subsidiaries [member]
The entity HYDRIL COMPANY and subsidiaries.
Technical Drilling & Production Services Nigeria. Ltd [member]
The entity Technical Drilling & Production Services Nigeria. Ltd.
Total borrowings, weighted average interest rates
Tubular Technical Services and Pipe Coaters [member]
The entity Tubular Technical Services and Pipe Coaters.
Bottom of range [member]
Amaja Tubular Services Limited [member]
The entity Amaja Tubular Services Limited.
Tenaris Supply Chain S.A. [member]
The entity Tenaris Supply Chain S.A.
Gepnaris S.A. [member]
The entity Gepnaris S.A.
Entity's total for business combinations [member]
ts_FinitelivedIntangibleAssetResidualValue
Finite-lived intangible asset, residual value
Represents the aggregate expected value at the end of their useful life of a finite-lived intangible asset.
Business combinations [axis]
CONFAB INDUSTRIAL S.A. and subsidiaries [member]
The entity CONFAB INDUSTRIAL S.A. and subsidiaries.
Disclosure of detailed information about equity method investments [text block]
The disclosure of detailed information about equity method investments. [Refer: Investments other than investments accounted for using equity method]
ALGOMA TUBES INC. [member]
The entity ALGOMA TUBES INC.
DALMINE S.p.A. [member]
The entity DALMINE S.p.A.
SIDERCA S.A.I.C. and subsidiaries [member]
The entity SIDERCA S.A.I.C. and subsidiaries.
ts_FinitelivedIntangibleAssetResidualUsefulLife
Finite-lived intangible asset, residual useful life
Represents the residual useful life of a finite-lived intangible asset.
SIAT SOCIEDAD ANONIMA [member]
The entity SIAT SOCIEDAD ANONIMA.
MAVERICK TUBE CORPORATION and subsidiaries [member]
The entity MAVERICK TUBE CORPORATION and subsidiaries.
NKKTUBES [member]
The entity NKKTUBES.
TALTA—TRADING E MARKETING SOCIEDADE UNIPESSOAL LDA. [member]
The entity TALTA—TRADING E MARKETING SOCIEDADE UNIPESSOAL LDA.
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]
TUBOS DE ACERO DE MEXICO S.A. [member]
The entity TUBOS DE ACERO DE MEXICO S.A.
S.C. SILCOTUB S.A. [member]
The entity S.C. SILCOTUB S.A.
Gross carrying amount [member]
PT SEAMLESS PIPE INDONESIA JAYA [member]
The entity PT SEAMLESS PIPE INDONESIA JAYA.
Carrying amount [member]
TENARIS INVESTMENTS S.àr.l. [member]
The entity TENARIS INVESTMENTS S.àr.l.
TENARIS INVESTMENTS SWITZERLAND AG and subsidiaries [member]
The entity TENARIS INVESTMENTS SWITZERLAND AG and subsidiaries.
TENARIS BAY CITY, INC. [member]
The entity TENARIS BAY CITY, INC.
TENARIS GLOBAL SERVICES (CANADA) INC. [member]
The entity TENARIS GLOBAL SERVICES (CANADA) INC.
TENARIS FINANCIAL SERVICES S.A. [member]
The entity TENARIS FINANCIAL SERVICES S.A.
TENARIS GLOBAL SERVICES S.A. and subsidiaries [member]
The entity TENARIS GLOBAL SERVICES S.A. and subsidiaries.
TENARIS GLOBAL SERVICES (UK) LTD [member]
The entity TENARIS GLOBAL SERVICES (UK) LTD.
ifrs-full_CashAdvancesAndLoansMadeToRelatedParties
Cash advances and loans made to related parties
Loan to non-consolidated companies
TENARIS GLOBAL SERVICES (U.S.A.) CORPORATION [member]
The entity TENARIS GLOBAL SERVICES (U.S.A.) CORPORATION.
Short – term investments
From non-consolidated companies
The amount of income (loss) from equity method investments in non-consolidated companies.
Liquidity funds
TENARIS TUBOCARIBE LTDA. [member]
The entity TENARIS TUBOCARIBE LTDA.
ts_EmployeeBenefitsUnitVestingPeriod
Employee benefits, unit vesting period
Represents the period that units under an employee retention and long term incentive program vest ratably.
ts_EmployeeBenefitsCompanyRedemtpionPeriod
Employee benefits, company redemtpion period
Represents the period at which the company will redeem units granted under the employee retention and long term inventive program.
ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale
Cash at the beginning
Cash at the end
ts_ImpairmentLossOnEquityMethodInvestmentInNonconsolidatedCompanies
Impairment loss on equity method investment in non-consolidated companies
Impairment loss on non-consolidated companies (see Note 12)
The amount of impairment loss on equity method investment in non-consolidated companies.
ts_NumberOfVotesPerShare
Number of votes, per share
Represents the number of votes given to each share of stock.
Disclosure of deferred taxes [text block]
Cash and cash equivalents:
Welded pipe assets [member]
Represents welded pipe assets.
ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan
Estimate of contributions expected to be paid to plan for next annual reporting period
ts_EmployeeBenefitsEarlyRedemptionPeriod
Employee benefits, early redemption period
Represents the period that the company may exercise an option to for early redemption of units granted under the employee retention and long term incentive program.
ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
At the beginning of the year
At December 31,
ifrs-full_SurplusDeficitInPlan
Liability (*)
Change in value of cash flow hedges
ifrs-full_PlanAssetsAtFairValue
Fair value of plan assets
ts_RevenueFromConstructionContractsPercentageOfTotalSales
Revenue from construction contracts, percentage of total sales
Represents the percentage of total sales that is made up from construction contracts.
ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption
ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
Percentage of reasonably possible decrease in actuarial assumption
ts_PercentageOfTotalSalesBillAndHoldArrangements
Percentage of total sales, bill and hold arrangements
Represents the percentage of total sales that is generated by bill and hold arrangements. A bill and hold arrangement is a form of sale where a seller of a good bills a customer for products but does not ship the product until a later date.
ts_CarryingValueOfUnitsGranted
Carrying value of units granted
Represents the carrying value of units granted to date under the employee retention and long term incentive program.
Cash flow hedges [member]
ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption
Usiminas [member]
Information related to Usiminas.
ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
Percentage of reasonably possible increase in actuarial assumption
Basic and diluted earnings per ADS (U.S. dollars per ADS) (*), discontinued operations
The amount of basic and diluted earnings (losses) per ADS from discontinued operations. Each ADS equals two shares.
Used in financing activities
ts_NumberOfSharesSubscribedTo
Number of shares subscribed to
Represents the amount of shares subscribed to.
ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations
(Decrease) Increase in cash
Earnings per share attributable to discontinued operations:
ifrs-full_CashFlowsFromUsedInFinancingActivities
Net cash used in financing activities
Disclosure of fair value of plan assets [text block]
ts_SharesSubscribedToPricePerShare
Shares subscribed to, price per share
Represents the price per share of shares subscribed to.
Levels of fair value hierarchy [axis]
ts_SharesSubscribedToValue
Shares subscribed to, value
Represents the value of shares subscribed to.
ts_InterestInAssociateSharesOwned
Interest in associate, shares owned
Represents the amount of shares owned of an associate entity.
At the beginning of the year
At the end of the year
ifrs-full_LiabilityAssetOfDefinedBenefitPlans
Net defined benefit liability (asset) at end of period
Values at the beginning of the year
At the end of the year
Disclosure of Nationalization of Subsidiaries [text block]
The entire disclosure for the nationalization of subsidiaries.
ts_NationalizationOfSubsidiariesCompensationAwardNotIncludingPreawardInterest
Nationalization of subsidiaries, compensation award not including pre-award interest
The amount awarded, not including pre-award interest, as compensation for the nationalization of subsidiaries.
ts_NumberOfMajorBusinessSegments
Number of major business segments
Represents the number of major business segments.
ts_NumberOfReportableOperatingSegments
Number of reportable operating segments
Represents the number of reportable operating segments.
ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities
Dividends paid to non-controlling interest in subsidiaries