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Intangible assets - Additional Information (Details) - EUR (€) € in Thousands |  | 12 Months Ended
--- | --- | ---
Apr. 28, 2023 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Business combinations |  | € 9,818 | € 8,424 | € 5,859
Bottom of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Percentage of discount rate applied to cash flow weighted average cost of capital |  | 8.68% | 8.75% |
Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Percentage of discount rate applied to cash flow weighted average cost of capital |  | 9.46% | 9.46% |
Zegna segment |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Growth rate |  | 3.00% |  |
Tom Ford Fashion | Bottom of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Growth rate |  | 2.75% |  |
Tom Ford Fashion | Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Growth rate |  | 3.00% |  |
Concessions, licenses, trademarks and patents | Tom Ford International LLC |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Identifiable intangible assets recognised as of acquisition date | € 99,295 |  |  |
Useful life of intangible asset | 30 years |  |  |
Gross carrying amount |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Business combinations |  |  | € 8,280 |
Gross carrying amount | Concessions, licenses, trademarks and patents |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Business combinations |  |  | € 0 |

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- Definition The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Total for all cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2025-01-01 -Paragraph 134 -Subparagraph d -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2025-en-r&anchor=para_134_d_iv&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2025-01-01 -Paragraph 134 -Subparagraph e -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2025-en-r&anchor=para_134_e_iv&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 254 -Subparagraph f -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_254_f_i&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 254 -Subparagraph d -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_254_d_ii&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 254 -Subparagraph d -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_254_d_ii&doctype=Standard -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 254 -Subparagraph f -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_254_f_i&doctype=Standard -URIDate 2025-03-27 + Details
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