v3.25.1

Details of the NovAlix transaction - Narrative (Details) - Drug discovery collaboration transaction with NovAliX - EUR (€) | Jun. 30, 2023 | Dec. 31, 2024
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Ifrs Collaborative Arrangement And Arrangements Other Than Collaborative [Line Items] |  |
Consideration | € 0 |
Term of collaboration agreement | 5 years |
Total commitment | € 73,800,000 | € 41,600,000
Collaboration agreement advances to be released classed as other current assets |  | 2,700,000
Collaboration agreement advances to be released classed as non-current asset |  | 2,900,000
Upfront payment made. | € 8,300,000 |
Remaining part of upfront payment to be released - current |  | 2,200,000
Remaining part of upfront payment to be released - Noncurrent |  | € 2,600,000

X
- Definition The amount of Collaboration Agreement Advances To Be Released Classed As Other Current Assets + References No definition available. + Details
Name: | glpg_CollaborationAgreementAdvancesToBeReleasedClassedAsOtherCurrentAssets
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of Collaboration Agreement Advances To Be Released Classed As Other Non-Current Assets. + References No definition available. + Details
Name: | glpg_CollaborationAgreementAdvancesToBeReleasedClassedAsOtherNonCurrentAssets
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of consideration assumed under the collaboration agreement. + References No definition available. + Details
Name: | glpg_CollaborationAgreementConsideration
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of current portion of remaining future purchase commitment to be released under the collaboration agreement. + References No definition available. + Details
Name: | glpg_CollaborationAgreementRemainingPurchaseCommitmentToBeReleasedCurrent
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non current portion of remaining future purchase commitment to be released under the collaboration agreement. + References No definition available. + Details
Name: | glpg_CollaborationAgreementRemainingPurchaseCommitmentToBeReleasedNonCurrent
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term of collaboration agreement. + References No definition available. + Details
Name: | glpg_CollaborationAgreementTerm
Namespace Prefix: | glpg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of total commitment under the collaboration agreement. + References No definition available. + Details
Name: | glpg_CollaborationAgreementTotalCommitment
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of upfront payment made under the collaboration agreement. + References No definition available. + Details
Name: | glpg_CollaborationAgreementUpfrontPayment
Namespace Prefix: | glpg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line item + References No definition available. + Details
Name: | glpg_IfrsCollaborativeArrangementAndArrangementsOtherThanCollaborativeLineItems
Namespace Prefix: | glpg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | glpg_IfrsCollaborativeArrangementAndArrangementsOtherThanCollaborativeAxis=glpg_CollaborationAgreementDrugDiscoveryCollaborationTransactionNovAlixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |