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Intangible assets - Schedule of Goodwill Originated on Acquisitions Made by the Group (Details) - EUR (€) € in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Disclosure of detailed information about intangible assets [line items] |  |  |
Goodwill | € 554,086 | € 614,363 | € 572,274
Goodwill and Brand Names |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Goodwill | 400,365 | 448,822 |
Goodwill and Brand Names | Zegna segment |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Goodwill | 32,588 | 33,344 |
Goodwill and Brand Names | Thom Browne segment |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Goodwill | € 367,777 | € 415,478 |

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