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Note 13 - Right-of-use assets, net and lease liabilities (Details Textual) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Disclosure of maturity analysis of operating lease payments [line items] |  |
Repayments of lease liabilities | $ 66.9 | $ 68.6
Repayment of interest on lease liabilities | $ 4.8 | $ 5.1
Not later than one year [member] |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |
Remaining lease payments to be made, percentage | 34.00% | 31.00%
Later than one year and not later than five years [member] |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |
Remaining lease payments to be made, percentage | 41.00% | 46.00%
Later than five years [member] |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |
Remaining lease payments to be made, percentage | 25.00% | 23.00%

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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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- Definition The amount of capital repayments of lease liabilities. + References No definition available. + Details
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Balance Type: | debit
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- Definition Percentage of total remaining payments to be made. + References No definition available. + Details
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Namespace Prefix: | ts_
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Balance Type: | na
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- Definition The cash outflow for repayment of interest on lease liabilities. + References No definition available. + Details
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- Details
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- Details
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- Details
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