v3.8.0.1
Document and Entity Information
12 Months Ended
Dec. 31, 2017
shares
Document and Entity Information [Abstract]  
Entity Registrant Name GALAPAGOS NV
Entity Central Index Key 0001421876
Document Type 20-F
Document Period End Date Dec. 31, 2017
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 50,936,778
Document Fiscal Year Focus 2017
Document Fiscal Period Focus FY