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Segment reporting - Narrative (Details) € in Thousands	Dec. 31, 2025 EUR (€) segment	Dec. 31, 2024 EUR (€)
Disclosure of operating segments [abstract]
Number of reportable segments | segment	3
Number of operating segments | segment	3
Disclosure of operating segments [line items]
Total non-current assets (other than financial instruments and deferred tax assets) | €	€ 1,441,952	€ 1,420,296
Netherlands
Disclosure of operating segments [line items]
Total non-current assets (other than financial instruments and deferred tax assets) | €	€ 2,383	€ 538

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The amount of non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Classes of financial instruments [domain]; Non-current assets]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2025-01-01
-Paragraph 33
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_33_b&doctype=Standard
-URIDate 2025-03-27

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Number of Segments, Operating

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Number of Segments, Reportable

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