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Note 26 - Derivative financial instruments - Net Fair Values (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of information about credit exposures designated as measured at fair value through profit or loss [line items] |  |
Derivatives with positive fair values | $ 9,801 | $ 30,805
Derivatives with negative fair values | (11,150) | (7,127)
Total | (1,349) | 23,678
Derivatives hedging borrowings and investments [member] |  |
Disclosure of information about credit exposures designated as measured at fair value through profit or loss [line items] |  |
Derivatives with positive fair values |  | 6,480
Other derivatives [member] |  |
Disclosure of information about credit exposures designated as measured at fair value through profit or loss [line items] |  |
Derivatives with positive fair values | 9,801 | 24,325
Derivatives with negative fair values | $ (11,150) | $ (7,127)

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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_DerivativeFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_DerivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition The amount of financial assets (liabilities) classified as derivative instruments. + References No definition available. + Details
Name: | ts_DerivativeFinancialAssetsLiabilities
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis=ts_DerivativesHedgingBorrowingsAndInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis=ts_OtherDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |