Discontinued operations and assets held for sale - Sale of Galapagos Real estate Belgium NV - Consideration received (Details) - Galapagos Real Estate Belgium NV [member]	12 Months Ended
Dec. 31, 2025 EUR (€)
Disclosure of analysis of single amount of off-balance sheet arrangements [line items]
Upfront Payment Received	€ 12,206,000
Total consideration	€ 12,206,000

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Total for all subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 40
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_40_a&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_ConsiderationPaidReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration