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Note 31 - Fees Paid to the Company's Principal Accountant (Tables) | 12 Months Ended
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Dec. 31, 2018
Statement Line Items [Line Items] |
Disclosure of auditor's remuneration [text block] |
(all amounts in thousands of U.S. dollars) |  | Year ended December 31,
|  | 2018 |  | 2017 |  | 2016
Audit fees |  |  | 3,841 |  |  |  | 3,995 |  |  |  | 3,588 |
Audit-related fees |  |  | 43 |  |  |  | 88 |  |  |  | 64 |
Tax fees |  |  | - |  |  |  | 23 |  |  |  | 14 |
All other fees |  |  | 7 |  |  |  | 30 |  |  |  | 3 |
Total |  |  | 3,891 |  |  |  | 4,136 |  |  |  | 3,669 |

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- Definition The disclosure of auditor's remuneration. + References No definition available. + Details
Name: | ts_DisclosureOfAuditorsRemunerationTextBlock
Namespace Prefix: | ts_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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