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Note 27 - Foreign exchange control measures in Argentina (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
ARGENTINA | Subsidiaries [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Percentage of entity's net equity	8.00%
Percentage of entity's revenue	12.00%
Argentine Peso / U.S. dollar foreign exchange risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Currency exposure / functional currency	$ 39,561	$ 95,811
Argentine Peso / U.S. dollar foreign exchange risk [member] | Argentina, Pesos
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Currency exposure / functional currency	$ 39,600

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of the entity's revenue. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 8
-IssueDate 2019-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_34&doctype=Standard
-URIDate 2019-03-27

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- Definition

The amount of currency exposure which impact profit and loss expressed as long/(short).

+ References

No definition available.

+ Details

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Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The percentage of the entity's net equity.

+ References

No definition available.

+ Details

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- Details

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- Details

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X

- Details

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- Details

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