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Note 37 - Climate change (Details Textual) - Medium term target [member]	1 Months Ended
	Feb. 28, 2021
Disclosure of climate change [line items]
Percentage of target for reducing carbon emissions intensity	30.00%
Period over climate-related target applies	2030
Baseline from which progress for climate-related target is measured	2018

X

- Definition

The description of the baseline from which progress for climate-related target is measured.

+ References

No definition available.

+ Details

Name:	ts_BaseLineFromWhichProgressForClimateRelatedTargetIsMeasured
Namespace Prefix:	ts_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	ts_DisclosureOfClimateChangeLineItems
Namespace Prefix:	ts_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of the target for reducing the intensity of carbon emissions.

+ References

No definition available.

+ Details

Name:	ts_PercentageOfTargetForReducingCarbonEmissionsIntensity
Namespace Prefix:	ts_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The description of the period over which the climate-related target applies.

+ References

No definition available.

+ Details

Name:	ts_PeriodOverClimateRelatedTargetApplies
Namespace Prefix:	ts_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ts_TimeHorizonAxis=ts_MediumTermTargetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: