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v3.19.1

Note 28 - Related Party Transactions (Tables) | 12 Months Ended
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Dec. 31, 2018
Statement Line Items [Line Items] |
Disclosure of transactions between related parties [text block] |
(all amounts in thousands of U.S. dollars) |  | Year ended December 31,
|  | 2018 |  | 2017 |  | 2016
(i) Transactions |  |  |  |  |  |  |  |  |
(a) Sales of goods and services |  |  |  |  |  |
Sales of goods to non-consolidated parties |  |  | 23,709 |  |  |  | 32,362 |  |  |  | 21,174 |
Sales of goods to other related parties |  |  | 131,548 |  |  |  | 94,624 |  |  |  | 32,613 |
Sales of services to non-consolidated parties |  |  | 7,641 |  |  |  | 11,637 |  |  |  | 9,542 |
Sales of services to other related parties |  |  | 5,647 |  |  |  | 3,751 |  |  |  | 2,948 |
|  |  | 168,545 |  |  |  | 142,374 |  |  |  | 66,277 |
(b) Purchases of goods and services |  |  |  |  |  |  |  |  |  |  |  |
Purchases of goods to non-consolidated parties |  |  | 245,186 |  |  |  | 234,361 |  |  |  | 67,048 |
Purchases of goods to other related parties |  |  | 106,624 |  |  |  | 17,711 |  |  |  | 20,150 |
Purchases of services to non-consolidated parties |  |  | 9,556 |  |  |  | 12,077 |  |  |  | 11,528 |
Purchases of services to other related parties |  |  | 46,179 |  |  |  | 50,794 |  |  |  | 53,530 |
|  |  | 407,545 |  |  |  | 314,943 |  |  |  | 152,256 |
(all amounts in thousands of U.S. dollars) |  | At December 31,
|  | 2018 |  | 2017
(ii) Period-end balances |  |  |  |
(a) Arising from sales / purchases of goods / services |  |  |  |
Receivables from non-consolidated parties |  |  | 122,135 |  |  |  | 117,853 |
Receivables from other related parties |  |  | 24,419 |  |  |  | 50,815 |
Payables to non-consolidated parties |  |  | (33,197 | ) |  |  | (49,354 | )
Payables to other related parties |  |  | (17,595 | ) |  |  | (14,475 | )
|  |  | 95,762 |  |  |  | 104,839 |

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- Definition The disclosure of transactions between the entity and its related parties. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 18 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_18&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
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