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Note 20 - Deferred Income Tax (Details Textual) $ in Millions | Dec. 31, 2019 USD ($)
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Statement Line Items [Line Items] |
Recognized tax losses expiring within one year, percentage | 0.20%
Recognized tax losses expiring in two to five years, percentage | 2.50%
Recognized tax losses expiring in more than five years, percentage | 97.30%
Unused tax losses for which no deferred tax asset recognised | $ 121.2
Unused tax losses for which no deferred tax asset recognised, percent expiring in less than one year | 2.80%
Unused tax losses for which no deferred tax asset recognised, percent expiring between two and five years | 20.20%
Unused tax losses for which no deferred tax asset recognised, percent expiring in more than five years | 77.00%
UNITED STATES |
Statement Line Items [Line Items] |
Deferred tax assets related to taxable losses of subsidiaries | $ 338.0

X
- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the amount of deferred tax assets related to taxable losses of the entity's subsidiaries. + References No definition available. + Details
Name: | ts_DeferredTaxAssetsRelatedToTaxableLossesOfSubsidiaries
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the percentage of recognized tax losses expected to expire in more than five years. + References No definition available. + Details
Name: | ts_RecognizedTaxLossesExpiringInMoreThanFiveYearsPercentage
Namespace Prefix: | ts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of recognized tax losses expected to expire in two to five years. + References No definition available. + Details
Name: | ts_RecognizedTaxLossesExpiringInTwoToFiveYearsPercentage
Namespace Prefix: | ts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of recognized tax losses expected to expire within one year. + References No definition available. + Details
Name: | ts_RecognizedTaxLossesExpiringWithinOneYearPercentage
Namespace Prefix: | ts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | ts_StatementLineItems
Namespace Prefix: | ts_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regarding the unused tax losses for which no deferred tax asset is recognized in the statement of financial position, this element represents the percentage expiring in two to five years. + References No definition available. + Details
Name: | ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringBetweenTwoAndFiveYears
Namespace Prefix: | ts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regarding the unused tax losses for which no deferred tax asset is recognized in the statement of financial position, this element represents the percentage expiring in less than one year. + References No definition available. + Details
Name: | ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInLessThanOneYear
Namespace Prefix: | ts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regarding the unused tax losses for which no deferred tax asset is recognized in the statement of financial position, this element represents the percentage expiring in more than five years. + References No definition available. + Details
Name: | ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInMoreThanFiveYears
Namespace Prefix: | ts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |