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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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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 + Details
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- References No definition available. + Details
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Period Type: | duration

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
Balance Type: | credit
Period Type: | duration

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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- Details
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- Details
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Period Type: |

X
- Details
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Period Type: |