Related party transactions - Schedule of Remuneration Of And Outstanding Balances With Zegna Directors And Key Executives With Strategic Responsibilities (Details) - EUR (€) € in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Remuneration Of And Outstanding Balances With Key Management Personnel [Line Items] | |||
| Short-term employee benefits | € 17,871 | € 15,849 | € 17,516 |
| Post- employment benefits | 1,093 | 1,986 | 3,047 |
| Other long-term benefits | 3,392 | 9,110 | |
| Other long-term benefits | (3,175) | ||
| Share-based payments | 1,286 | 4,058 | 14,251 |
| Professional fees expense | 2,609 | ||
| Key Management Personnel | |||
| Disclosure Of Remuneration Of And Outstanding Balances With Key Management Personnel [Line Items] | |||
| Employee benefits | 3,749 | 7,074 | 4,346 |
| Other non current financial liabilities | 90,295 | 127,072 | 138,558 |
| Other current liabilities | € 4,495 | € 4,912 | € 43,034 |