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Cash and cash equivalents - Additional Information (Details) - EUR (€) € in Thousands	Dec. 31, 2025	Dec. 31, 2024
Cash held in China
Disclosure Of Cash And Cash Equivalents And Restricted Cash And Cash Equivalents [Line Items]
Restricted cash and cash equivalents	€ 27,668	€ 22,105

X

- Definition

The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Disclosure of cash and cash equivalents and restricted cash and cash equivalents line items.

+ References

No definition available.

+ Details

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Namespace Prefix:	zgn_
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: