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Note 9 - Property, Plant and Equipment, Net (Details Textual) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement Line Items [Line Items]
Property, plant and equipment, capitalized interest	$ 35.4	$ 37.4

X

- Definition

The amount of capitalized interest included in property, plant and equipment.

+ References

No definition available.

+ Details

Name:	ts_PropertyPlantAndEquipmentCapitalizedInterest
Namespace Prefix:	ts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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