Cash and cash equivalents - Narrative (Details) - EUR (€) € in Millions	1 Months Ended	6 Months Ended
Apr. 30, 2026	Jun. 30, 2026
Cash and cash equivalents [abstract]
Proceeds from issuing shares	€ 37.0	€ 37.0

The cash inflow from issuing shares.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 17
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_17_a&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_ProceedsFromIssuingShares
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration