v3.25.1

Events after balance sheet date (Details)	Jan. 08, 2025 EUR (€) position
Separation Agreement - Spin-off
Disclosure of non-adjusting events after reporting period
Cash in Galapagos after separation	€ 500,000,000
Cash In SpincO After Separation	€ 2,450,000,000
Discontinuation of small molecule discovery program
Disclosure of non-adjusting events after reporting period
Number of position lost | position	300
Percentage of Company's employees position lost	40.00%
Restructuring provision	€ 57,000,000

X

- Definition

The amount of cash in SpinCo after separation.

+ References

No definition available.

+ Details

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Namespace Prefix:	glpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of cash remaining in Galapagos after separation.

+ References

No definition available.

+ Details

Name:	glpg_CashRemainingInGalapagos
Namespace Prefix:	glpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of positions lost following reorganization of the business.

+ References

No definition available.

+ Details

Name:	glpg_NumberOfPositionsLostFollowingReorganization
Namespace Prefix:	glpg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of company's employees position lost in reorganization.

+ References

No definition available.

+ Details

Name:	glpg_PercentageOfTotalEmployeesLost
Namespace Prefix:	glpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of provision for restructuring, such as the sale or termination of a line of business; closure of business locations in a country or region or relocation of activities from one country or region to another; changes in management structure; and fundamental reorganisations that have a material effect on the nature and focus of the entity's operations. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 37
-IssueDate 2024-01-01
-Paragraph 70
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_70&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: