The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_ClosingForeignExchangeRate
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	ifrs-full_DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 8
-Subparagraph h
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_8_h&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 44
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_e&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 44
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_e&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 8
-IssueDate 2025-01-01
-Paragraph 34
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_34&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_PercentageOfEntitysRevenue
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of currency exposure which impact profit and loss expressed as long/(short).

+ References

No definition available.

+ Details

Name:	ts_ForeignExchangeRiskCurrencyExposure
Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage of the entity's net equity.

+ References

No definition available.

+ Details

Name:	ts_PercentageOfEntitysNetEquity
Namespace Prefix:	ts_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_AR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=ts_ArgentineSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfRisksAxis=ts_ArgentinePesoUsDollarForeignExchangeRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_ARS
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfRisksAxis=ts_InternationalMarketMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=ts_UsDollarDenominatedArgentineBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 29 - Foreign exchange control measures in Argentina (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Percentage of entity's revenue	10.00%	10.00%	10.00%
Argentina
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Percentage of entity's revenue	11.00%
Argentina \| Argentine Subsidiaries [Member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Percentage of entity's net equity	13.00%
Percentage of entity's revenue	17.00%
Argentine Peso / U.S. dollar foreign exchange risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Currency exposure / functional currency	$ (8,777)	$ (40,565)
Argentine Peso / U.S. dollar foreign exchange risk [member] \| Argentina, Pesos
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Exchange rate of the Argentine peso per U.S. dollar	1,455
International market [member] \| Argentine Subsidiaries [Member] \| Us Dollar Denominated Argentine Bonds [Member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Financial assets at fair value through other comprehensive income	$ 204,400