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Note 24 - Derivative Financial Instruments - Net Fair Values (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Statement Line Items [Line Items] |  |  |
Derivatives with positive fair values | [1] | $ 19,929 | $ 9,225
Derivatives with negative fair values |  | (1,814) | (11,978)
Total |  | 18,115 | (2,753)
Derivatives hedging borrowings and investments [member] |  |  |
Statement Line Items [Line Items] |  |  |
Derivatives with positive fair values |  | 19,000 | 5,604
Derivatives with negative fair values |  |  | (11,667)
Other derivatives [member] |  |  |
Statement Line Items [Line Items] |  |  |
Derivatives with positive fair values |  | 929 | 3,621
Derivatives with negative fair values |  | $ (1,814) | $ (311)
[1] | In 2018 includes $52 thousand of non-current derivatives.

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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The amount of financial assets (liabilities) classified as derivative instruments. + References No definition available. + Details
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Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
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Period Type: | duration

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- Details
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- Details
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