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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 increase in intangible assets and goodwill resulting from acquisitions through business combinations. [Refer: Total for all business combinations [member]; Intangible assets and goodwill]

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The amount recognised as of the acquisition date for identifiable intangible assets acquired in a business combination. [Refer: Intangible assets other than goodwill; Total for all business combinations [member]]

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