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Note 23 - Other liabilities - Plan Assets (Details) - Post-employment benefits - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Funded

Disclosure of defined benefit plans [line items]

At the beginning of the year

$ (134,052)

At the end of the year

$ (102,653)

$ (134,052)

Equity instruments

3.00%

18.00%

Debt instruments

60.00%

33.00%

Others

^[1]

37.00%

49.00%

Fair value of funded post-employment benefits [member]

Disclosure of defined benefit plans [line items]

At the beginning of the year

$ (134,052)

$ (126,842)

Translation differences

7,047

(1,897)

Return on plan assets

(6,010)

(6,121)

Remeasurements

(302)

(4,225)

Increase due to business combinations

^[2]

(3,903)

Contributions paid to the plan

(1,269)

Benefits paid

8,300

8,459

Other

23,633

477

At the end of the year

$ (102,653)

$ (134,052)

[1]	For the years 2024 and 2023, mainly include annuities purchased from an insurance company for the benefit of current and future retirees.
[2]	For the years 2024 and 2023, related to Mattr’s pipe coating business unit acquisition. For more information see note 34.

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

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 57
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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Period Type:	instant

X

- Definition

Increase (decrease) in defined benefit plan assets resulting from remeasurment of plan assets, defined benefit plan assets at fair value.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

X

- Definition

Decrease in defined benefit plan assets resulting from benefits paid to the plan assets, defined benefit plan assets at fair value

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase in defined benefit plan assets resulting from contributions paid to the plan assets, defined benefit plan assets at fair value

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

The percent that instruments representing debt (rather than equity) constitute of the fair value of defined benefit plan assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
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X

- Definition

The percent that instruments representing equity (rather than debt) constitute of the fair value of defined benefit plan assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
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Balance Type:	na
Period Type:	instant

X

- Definition

Increase (decrease) in defined benefit plan assets resulting from business combination of plan assets, defined benefit plan assets at fair value

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase (decrease) in defined benefit plan assets resulting from changes in foreign exchange rates, defined benefit plan assets at fair value.

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Increase (decrease) in defined benefit plan assets resulting from other changes of plan assets, defined benefit plan assets at fair value

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

The percent that other types of assets not separately disclosed constitute of the fair value of defined benefit plan assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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X

- Definition

Increase (decrease) in defined benefit plan assets resulting from changes plan assets, defined benefit plan assets at fair value

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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Namespace Prefix:
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Period Type: