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Note 8 - Equity in earnings of non-consolidated companies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Bargain purchase gain	$ 2,212	$ 3,162
Impairment loss on non-consolidated companies			34,041
PAO Severstal
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Impairment loss on non-consolidated companies			14,900
Usiminas
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Impairment loss on non-consolidated companies			19,100
Loss related to provision for the ongoing litigation related to the acquisition of participation in Usiminas	(43,300)
Global Pipe Company
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items]
Remeasurement of previously held interest		4,506
Bargain purchase gain		$ 11,487

X

- Definition

The gain (loss) recognised as result of remeasuring to fair value the equity interest in the acquiree held by the acquirer before the business combination. [Refer: Total for all business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2024-01-01
-Paragraph B64
-Subparagraph p
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_p_ii&doctype=Appendix&subtype=B
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
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X

- Definition

The amount of any gain recognised in a business combination in which the net of the identifiable assets acquired and the liabilities assumed exceeds the aggregate of the consideration transferred, non-controlling interest in the acquiree and fair value of the acquirer's previously held equity interest in the acquiree. [Refer: Total for all business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2024-01-01
-Paragraph B64
-Subparagraph n
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_n_i&doctype=Appendix&subtype=B
-URIDate 2024-03-27

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X

- References

No definition available.

+ Details

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X

- Definition

The amount of gain loss related to provision for litigation related to acquisition.

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The amount of impairment loss recognised in profit or loss in non-consolidated companies.

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
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X

- Details

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Period Type:

X

- Details

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Period Type:

X

- Details

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Namespace Prefix:
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Period Type: