v3.26.1
Discontinued operations and assets held for sale - Sale of Galapagos real estate Belgium NV - Gain on disposal of subsidiaries (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 Income € 12,206,000
Settlement of intercompany loan (11,012,000)
Net assets disposed of (109,000)
Gain on disposal of subsidiaries € 1,085,000