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Note 19 - Trade receivables, net - Summary of the Aging of Trade Receivables (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of financial assets that are either past due or impaired [line items] |  |
Guaranteed | $ 288,388 | $ 261,113
Not guaranteed | 1,667,244 | 2,268,822
Guaranteed and not guaranteed | $ 1,955,632 | $ 2,529,935
Expected loss rate | 0.03% | 0.06%
Allowance for doubtful accounts | $ (525) | $ (1,636)
Nominative allowance for doubtful accounts | (47,600) | (47,410)
Net Value | 1,907,507 | 2,480,889
Current trade receivables, not due [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Guaranteed | 254,777 | 236,714
Not guaranteed | 1,305,338 | 1,613,626
Guaranteed and not guaranteed | $ 1,560,115 | $ 1,850,340
Expected loss rate | 0.01% | 0.02%
Allowance for doubtful accounts | $ (147) | $ (312)
Nominative allowance for doubtful accounts |  |
Net Value | 1,559,968 | 1,850,028
Current trade receivables, past due, less than 180 days [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Guaranteed | 33,341 | 23,991
Not guaranteed | 298,988 | 590,236
Guaranteed and not guaranteed | $ 332,329 | $ 614,227
Expected loss rate | 0.09% | 0.18%
Allowance for doubtful accounts | $ (323) | $ (1,249)
Nominative allowance for doubtful accounts | (303) | (748)
Net Value | 331,703 | 612,230
Current trade receivables, past due, greater than 180 days [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Guaranteed | 270 | 408
Not guaranteed | 62,918 | 64,960
Guaranteed and not guaranteed | $ 63,188 | $ 65,368
Expected loss rate | 0.33% | 0.46%
Allowance for doubtful accounts | $ (55) | $ (75)
Nominative allowance for doubtful accounts | (47,297) | (46,662)
Net Value | $ 15,836 | $ 18,631

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- Definition The amount of current trade receivables. [Refer: Trade receivables] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 68 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_68&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_CurrentTradeReceivables
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of allowance for doubtful accounts, net of nominative allowances. + References No definition available. + Details
Name: | ts_AllowanceForDoubtfulAccountsNetOfNominativeAllowances
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The expected loss rate of current trade receivables. + References No definition available. + Details
Name: | ts_CurrentTradeReceivablesExpectedLossRate
Namespace Prefix: | ts_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The gross amount of current trade receivables. + References No definition available. + Details
Name: | ts_CurrentTradeReceivablesGross
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents the amount current trade receivables that are guaranteed. + References No definition available. + Details
Name: | ts_CurrentTradeReceivablesGuaranteed
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of nominative allowances for doubtful accounts from current trade receivables. + References No definition available. + Details
Name: | ts_CurrentTradeReceivablesNominativeAllowancesForDoubtfulAccounts
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents the amount of current trade receivables that are not guaranteed. + References No definition available. + Details
Name: | ts_CurrentTradeReceivablesNotGuaranteed
Namespace Prefix: | ts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ts_CurrentTradeReceivablesPastDueLessThan180DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ts_CurrentTradeReceivablesPastDueGreaterThan180DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |