v3.25.1

Details of the NovAlix transaction - Advance (Details) - Drug discovery collaboration transaction with NovAliX € in Thousands	12 Months Ended
	Dec. 31, 2023 EUR (€)
Ifrs Collaborative Arrangement And Arrangements Other Than Collaborative [Line Items]
Loss on sale of fixed assets	€ 12,506
Result of transfer of retirement benefit liability	(3,022)
Result of transfer of right-of-use asset	174
Advance related to the NovAliX transaction	€ 9,658

X

- Definition

The amount of advances to be released under the collaboration agreement.

+ References

No definition available.

+ Details

Name:	glpg_CollaborationAgreementAdvancesToBeReleased
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

- Definition

The amount of result of transfer of retirement benefit liability.

+ References

No definition available.

+ Details

Name:	glpg_ResultOfTransferOfRetirementBenefitLiability
Namespace Prefix:	glpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of result of transfer of right-of-use asset.

+ References

No definition available.

+ Details

Name:	glpg_ResultOfTransferOfRightOfUseAsset
Namespace Prefix:	glpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The losses on the disposal of property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 98
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Details

Name:	glpg_IfrsCollaborativeArrangementAndArrangementsOtherThanCollaborativeAxis=glpg_CollaborationAgreementDrugDiscoveryCollaborationTransactionNovAlixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: