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Note 32 - Business Combinations - Assets and Liabilities Assumed (Details) ر.س in Millions, $ in Millions | Jan. 02, 2020 USD ($) | Jan. 21, 2019 SAR (ر.س) | Jan. 21, 2019 USD ($)
--- | --- | --- | ---
Ipsco Tubulars Inc [Member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Property, Plant and Equipment | $ 503 |  |
Intangible assets | 170 |  |
Working capital | 138 |  |
Cash and Cash Equivalents | 4 |  |
Borrowings | (53) |  |
Provisions | (27) |  |
Other assets and liabilities, net | (63) |  |
Net assets acquired | $ 672 |  |
Saudi Steel Pipe Company [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Property, Plant and Equipment |  | ر.س 671 | $ 179
Customer relationship |  | 305 | 81
Investment in associated |  | 77 | 21
Working capital |  | 167 | 45
Cash and Cash Equivalents |  | 32 | 9
Other Receivables |  | 11 | 3
Borrowings |  | (304) | (81)
Employees end of service benefits |  | (59) | (16)
Deferred Tax Liabilities |  | (47) | (13)
Net assets acquired |  | ر.س 853 | $ 228

X
- Definition The amount recognised as of the acquisition date for borrowings assumed in a business combination. [Refer: Borrowings; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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Balance Type: | credit
Period Type: | instant

X
- Definition The amount recognised as of the acquisition date for cash and cash equivalents acquired in a business combination. [Refer: Cash and cash equivalents; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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Balance Type: | debit
Period Type: | instant

X
- Definition The amount recognised as of the acquisition date for customer-related intangible assets acquired in a business combination. [Refer: Customer-related intangible assets [member]; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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Balance Type: | debit
Period Type: | instant

X
- Definition The amount recognised as of the acquisition date for deferred tax liabilities assumed in a business combination. [Refer: Deferred tax liabilities; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount recognised as of the acquisition date for net identifiable assets acquired or liabilities assumed in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph IE72 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_IE72&doctype=Illustrative%20Examples -URIDate 2019-03-27 + Details
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- Definition The amount recognised as of the acquisition date for identifiable intangible assets acquired in a business combination. [Refer: Intangible assets other than goodwill; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph IE72 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_IE72&doctype=Illustrative%20Examples -URIDate 2019-03-27 + Details
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Period Type: | instant

X
- Definition The amount recognised as of the acquisition date for plant, property and equipment acquired in a business combination. [Refer: Property, plant and equipment; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph IE72 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_IE72&doctype=Illustrative%20Examples -URIDate 2019-03-27 + Details
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Balance Type: | debit
Period Type: | instant

X
- Definition The amount of employee service benefits recognised as of acquisition date. + References No definition available. + Details
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Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of investments recognised as of acquisition date. + References No definition available. + Details
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Balance Type: | debit
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X
- Definition The amount recognised as of the acquisition date for other assets and liabilities, net acquired in a business combination. + References No definition available. + Details
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Namespace Prefix: | ts_
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Balance Type: | debit
Period Type: | instant

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- Definition The amount of other receivables recognised as of acquisition date. + References No definition available. + Details
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X
- Definition The amount recognised as of the acquisition date for provisions assumed in a business combination. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of working capital recognised as of acquisition date. + References No definition available. + Details
Name: | ts_WorkingCapitalRecognisedAsOfAcquisitionDate
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=ts_IpscoTubularsIncMember
Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=ts_SaudiSteelPipeCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |