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Note 33 - Principal subsidiaries (Details Textual)	1 Months Ended	12 Months Ended
	Apr. 30, 2023	Dec. 31, 2024	Dec. 31, 2022
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		50.00%
SAUDI STEEL PIPE CO. and subsidiaries [Member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		47.79%
Tubular Technical Services and Pipe Coaters [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		40.00%
Tubulars Finishing Nigeria Limited [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		49.00%
Amaja Tubular Services Limited [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		49.00%
Tenaris Baogang Baotou Steel Pipes Ltd [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		60.00%
Tenaris Supply Chain S.A. [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary			98.40%
Global Pipe Company [Member] | SAUDI STEEL PIPE CO. and subsidiaries [Member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		57.30%
Siderca SAIC [Member] | NKKTUBES [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary	51.00%
EXIROS B.V. and subsidiaries [member] | Ternium S.A. [member]
Disclosure of subsidiaries [line items]
Percent of company voting capital		50.00%
EXIROS B.V. and subsidiaries [member] | Tenaris [member]
Disclosure of subsidiaries [line items]
Percent of company voting capital		50.00%
DALMINE S.p.A. and subsidiaries [member] | Immobiliare Cultura Industriale S.R.L. [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		57.00%

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.

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- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2024-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2024-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph 19B
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19B_c&doctype=Standard
-URIDate 2024-03-27

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