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Note 26 - Derivative financial instruments - Commodities Derivative Contracts (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	$ (1,349)	$ 23,678
Hedge accounting reserve	8,100	13,100
Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Hedge accounting reserve	8,133	13,122	$ 1,259
Commodity Derivatives [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	205	(3,360)
Hedge accounting reserve	205	(7,963)
Commodity Derivatives [member] | Commodities derivative contracts, Houston Ship Channel Gas [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	(231)	(814)
Hedge accounting reserve	(231)	(814)
Commodity Derivatives [member] | Commodities derivative contracts, LME Scrap [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	1,376	29
Hedge accounting reserve	1,376	(3,148)
Commodity Derivatives [member] | Commodities derivative contracts, Iron Ore [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives		12
Hedge accounting reserve		(1,274)
Commodity Derivatives [member] | Commodities derivative contracts, Electric Energy [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	(340)	(519)
Hedge accounting reserve	(340)	(519)
Commodity Derivatives [member] | Commodities derivative contracts, TTF Gas [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives		(2,068)
Hedge accounting reserve		(2,207)
Commodity Derivatives [member] | Commodities derivative contracts, PSV Gas [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	(2,566)
Hedge accounting reserve	(2,566)
Commodity Derivatives [member] | Commodities derivative contracts, Nickel [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Fair value of derivatives	1,966
Hedge accounting reserve	$ 1,966

X

- 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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X

- Definition

A component of equity representing the reserve of cash flow hedges in relation to continuing hedges. [Refer: Reserve of cash flow hedges]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 24B
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24B_b_ii&doctype=Standard
-URIDate 2023-03-23

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X

- Definition

The amount of financial assets (liabilities) classified as derivative instruments.

+ References

No definition available.

+ Details

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- Details

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- Details

Name:	ifrs-full_HedgingInstrumentsAxis=ts_CommoditiesDerivativeContractsHoustonShipChannelGasMember
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Name:	ifrs-full_HedgingInstrumentsAxis=ts_CommoditiesDerivativeContractsElectricEnergyMember
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- Details

Name:	ifrs-full_HedgingInstrumentsAxis=ts_CommoditiesDerivativeContractsTitleTransferFacilityGasMember
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- Details

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- Details

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