GALAPAGOS NV (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 00090 - Document - Document and Entity Information Network

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2 Implied Table Table

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3 Document and Entity Information [Abstract] Abstract glpg:DocumentAndEntityInformationAbstract
4 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
5 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
6 Document Type Concept (Submission Type) For Period dei:DocumentType
7 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
8 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
9 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
10 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
11 Entity Voluntary Filers Concept (Yes/No) For Period dei:EntityVoluntaryFilers
12 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
13 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
14 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
15 Entity Shell Company Concept (Yes/No) For Period dei:EntityShellCompany
16 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
17 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
18 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
19 00100 - Statement - Consolidated Statement of Financial Position Network

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20 Implied Table Table

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21 Consolidated Statement of Financial Position Abstract ifrs-full:StatementOfFinancialPositionAbstract
22 Assets Abstract ifrs-full:AssetsAbstract
23 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
24 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
25 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
26 Non-current R&D incentives receivables Concept (Monetary) As Of Debit glpg:NonCurrentResearchAndDevelopmentIncentivesReceivables
27 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
28 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
29 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
30 Current R&D incentives receivables Concept (Monetary) As Of Debit glpg:CurrentResearchAndDevelopmentIncentivesReceivables
31 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
32 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
33 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
34 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
35 Equity and liabilities Abstract ifrs-full:EquityAndLiabilitiesAbstract
36 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
37 Share premium account Concept (Monetary) As Of Credit ifrs-full:SharePremium
38 Other reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
39 Translation differences Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
40 Accumulated losses Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
41 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
42 Pension liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentRecognisedLiabilitiesDefinedBenefitPlan
43 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
44 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
45 Non-current deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
46 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
47 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
48 Trade and other liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
49 Current tax payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilities
50 Current deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
51 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
52 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
53 Total equity and liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
54 00200 - Statement - Consolidated Statement of Operations Network

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 http://www.glpg.com/role/StatementConsolidatedStatementOfOperations
55 Implied Table Table

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56 Consolidated Income Statement Abstract ifrs-full:IncomeStatementAbstract
57 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
58 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
59 Total revenues and other income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
60 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
61 General and administrative expenses Concept (Monetary) For Period Debit ifrs-full:GeneralAndAdministrativeExpense
62 Sales and marketing expenses Concept (Monetary) For Period Debit ifrs-full:SalesAndMarketingExpense
63 Operating loss Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
64 Operating gain / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
65 Fair value re-measurement of share subscription agreement Concept (Monetary) For Period Credit ifrs-full:GainsLossesRecognisedInProfitOrLossAttributableToChangeInUnrealisedGainsOrLossesForEntitysOwnEquityInstrumentsHeldAtEndOfPeriodFairValueMeasurement
66 Other financial income Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
67 Other financial expenses Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
68 Income / loss (-) before tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
69 Income taxes Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
70 Net income / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
71 Net income / loss (-) attributable to: Owners of the paren Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
72 Basic income / loss (-) per share Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
73 Diluted gain / loss (-) per share Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
74 Weighted average number of shares - Basic Concept (Shares) For Period ifrs-full:WeightedAverageShares
75 Weighted average number of shares - Diluted Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
76 00300 - Statement - Consolidated Statement of Comprehensive Income Network

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 http://www.glpg.com/role/StatementConsolidatedStatementOfComprehensiveIncome
77 Implied Table Table

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78 Consolidated Statement of Comprehensive Income Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
79 Net income / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
80 Items that will not be reclassified subsequently to profit or loss: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
81 Re-measurement of defined benefit obligation Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
82 Items that may be reclassified subsequently to profit or loss: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
83 Fair value adjustment of financial assets available-for-sale Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxAvailableforsaleFinancialAssets
84 Translation differences, arisen from translating foreign activities Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
85 Other comprehensive income / loss (-), net of income tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
86 Total comprehensive income/ loss (-) attributable to: Owners of the parent Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
87 00400 - Statement - Consolidated Statement of Changes in Equity Network

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 http://www.glpg.com/role/StatementConsolidatedStatementOfChangesInEquity
88 Statement of changes in equity [table] Table

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 ifrs-full:StatementOfChangesInEquityTable
89 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
90 Currently stated [member] Member ifrs-full:RestatedMember
91 IFRS 15 Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
92 IFRS 9 Member glpg:IncreaseDecreaseDueToApplicationOfIfrs9Member
93 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
94 Equity [member] Member ifrs-full:EquityMember
95 Share capital Member ifrs-full:IssuedCapitalMember
96 Share premium account Member ifrs-full:SharePremiumMember
97 Translation differences Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
98 Other reserves Member ifrs-full:OtherReservesMember
99 Accumulated losses Member ifrs-full:RetainedEarningsMember
100 Consolidated Statement of Changes in Equity LineItems ifrs-full:StatementOfChangesInEquityLineItems
101 Balance at beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
102 Change in accounting policy Concept (Monetary) As Of Credit glpg:IfrsCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
103 Restated total equity Concept (Monetary) As Of Credit glpg:EquityAdjustedForCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
104 Net income / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
105 Other comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
106 Total comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
107 Share-based compensation Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
108 Issue of new shares Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
109 Share issue costs Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
110 Exercise of warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
111 Balance at end of period Concept (Monetary) As Of Credit ifrs-full:Equity
112 00500 - Statement - Consolidated Statement of Cash Flows Network

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 http://www.glpg.com/role/StatementConsolidatedStatementOfCashFlows
113 Implied Table Table

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114 Consolidated Cash Flows Statement Abstract ifrs-full:StatementOfCashFlowsAbstract
115 Net income / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
116 Adjustment for non-cash transactions Concept (Monetary) For Period Debit glpg:AdjustmentForNonCashTransactions
117 Adjustment for items to disclose separately under operating cash flow Concept (Monetary) For Period Debit glpg:AdjustmentForItemsToDiscloseSeparatelyUnderOperatingCashFlow
118 Adjustment for items to disclose under investing and financing cash flows Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow
119 Change in working capital other than deferred income Concept (Monetary) For Period Credit glpg:IncreaseDecreaseInWorkingCapitalExcludingDeferredIncome
120 Decrease (-) / increase in deferred income Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
121 Cash generated / used (-) in operations Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperations
122 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsOperatingActivities
123 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
124 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
125 Net cash flows generated/used (-) in operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
126 Purchase of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
127 Purchase of and expenditure in intangible fixed assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
128 Proceeds from disposal of intangible assets Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities
129 Proceeds from disposal of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
130 Decrease in restricted cash Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents
131 Acquisition of financial assets held at fair value through profit or loss Concept (Monetary) For Period Credit ifrs-full:PurchaseOfAvailableforsaleFinancialAssets
132 Proceeds from sale of financial assets held at fair value through profit or loss Concept (Monetary) For Period Debit ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
133 Net cash flows used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
134 Repayment of obligations under finance leases and other debts Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
135 Proceeds from capital and share premium increases, gross amount Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingShares
136 Issue cost paid, related to capital and share premium increases Concept (Monetary) For Period Credit ifrs-full:PaymentsForShareIssueCosts
137 Proceeds from capital and share premium increases from exercise of warrants Concept (Monetary) For Period Debit glpg:ProceedsFromExerciseOfWarrants
138 Net cash flows generated in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
139 Increase in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
140 Cash and cash equivalents at beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
141 Effect of exchange rate differences on cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
142 Cash and cash equivalents at end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
143 10101 - Disclosure - General information Network

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144 Implied Table Table

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145 General information Abstract glpg:DisclosureOfGeneralInformationAboutFinancialStatementsAbtract
146 General information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
147 10201 - Disclosure - Significant accounting policies Network

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148 Implied Table Table

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149 Significant accounting policies Abstract glpg:DisclosureOfSignificantAccountingPoliciesAbstract
150 Significant accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
151 10301 - Disclosure - Critical accounting estimates and judgments Network

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152 Implied Table Table

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153 Critical accounting estimates and judgments Abstract glpg:DisclosureOfCriticalAccountingEstimatesAndJudgementsAbstract
154 Critical accounting estimates and judgments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
155 10401 - Disclosure - Segment information Network

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156 Implied Table Table

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157 Segment information Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
158 Segment information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
159 10501 - Disclosure - Total revenues and other income Network

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160 Implied Table Table

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161 Total revenues and other income Abstract glpg:DisclosureOfTotalRevenuesAndOtherIncomeAbstract
162 Total revenues and other income Concept (Text Block (HTML)) For Period glpg:DisclosureOfTotalRevenuesAndOtherIncomeExplantoryTextBlock
163 10601 - Disclosure - Operating costs Network

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164 Implied Table Table

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165 Operating costs Abstract ifrs-full:ExpenseByNatureAbstract
166 Operating costs Concept (Text Block (HTML)) For Period glpg:DisclosureOfOperatingCostsExplanatoryTextBlock
167 10701 - Disclosure - Staff costs Network

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168 Implied Table Table

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169 Staff costs Abstract ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
170 Staff costs Concept (Text Block (HTML)) For Period glpg:DisclosureOfStaffCostsExplanatory
171 10801 - Disclosure - Fair value re-measurement of share subscription agreement Network

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172 Implied Table Table

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173 Fair value re-measurement of share subscription agreement Abstract ifrs-full:DisclosureOfOffsettingOfFinancialAssetsAbstract
174 Fair value re-measurement of share subscription agreement Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfHedgeAccountingExplanatory
175 10901 - Disclosure - Other financial income / expenses Network

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176 Implied Table Table

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177 Other financial income / expenses Abstract ifrs-full:MaterialIncomeAndExpenseAbstract
178 Other financial income / expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
179 11001 - Disclosure - Taxes Network

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180 Implied Table Table

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181 Taxes Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
182 Taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
183 11101 - Disclosure - Income/ loss per share Network

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184 Implied Table Table

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185 Income/ loss per share Abstract ifrs-full:EarningsPerShareAbstract
186 Income/ loss per share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
187 11201 - Disclosure - Intangible assets Network

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188 Implied Table Table

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189 Intangible assets Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
190 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
191 11301 - Disclosure - Property, plant and equipment Network

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 http://www.glpg.com/role/DisclosurePropertyPlantAndEquipment
192 Implied Table Table

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193 Property, plant and equipment Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
194 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
195 11401 - Disclosure - Other non-current assets Network

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196 Implied Table Table

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197 Other non-current assets Abstract glpg:OtherNoncurrentAssetsAbstract
198 Other non-current assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
199 11501 - Disclosure - Research and Development incentives receivables Network

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200 Implied Table Table

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201 Research and Development incentives receivables Abstract glpg:ResearchAndDevelopmentIncentivesReceivablesAbstract
202 Research and Development incentives receivables Concept (Text Block (HTML)) For Period glpg:DisclosureOfResearchAndDevelopmentIncentivesReceivablesExplanatoryTextBlock
203 11601 - Disclosure - Trade and other receivables and other current assets Network

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 http://www.glpg.com/role/DisclosureTradeAndOtherReceivablesAndOtherCurrentAssets
204 Implied Table Table

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205 Trade and other receivables and other current assets Abstract glpg:TradeAndOtherReceivablesAndOtherCurrentAssets
206 Trade and other receivables and other current assets Concept (Text Block (HTML)) For Period glpg:TradeAndOtherReceivablesAndOtherCurrentAssetsExplanatoryTextBlock
207 11701 - Disclosure - Cash and cash equivalents Network

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208 Implied Table Table

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209 Cash and cash equivalents Abstract ifrs-full:CashAndCashEquivalentsAbstract
210 Cash and cash equivalents Concept (Text Block (HTML)) For Period glpg:CashAndCashEquivalentsExplanatoryTextBlock
211 11801 - Disclosure - Share capital Network

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212 Implied Table Table

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213 Share capital Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
214 Share capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
215 11901 - Disclosure - Other reserves Network

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216 Implied Table Table

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217 Other reserves Abstract ifrs-full:OtherReservesAbstract
218 Other reserves Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
219 12001 - Disclosure - Translation differences Network

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220 Implied Table Table

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221 Translation differences Abstract ifrs-full:ExchangeDifferencesOnTranslationAbstract
222 Translation differences Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory
223 12101 - Disclosure - Deferred tax Network

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224 Implied Table Table

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225 Deferred tax Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
226 Deferred tax Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
227 12201 - Disclosure - Trade and other liabilities Network

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228 Implied Table Table

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229 Trade and other liabilities Abstract ifrs-full:TradeAndOtherPayablesAbstract
230 Trade and other liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
231 12301 - Disclosure - Deferred income Network

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232 Implied Table Table

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233 Deferred income Abstract glpg:DeferredIncomeAbstract
234 Deferred income Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredIncomeExplanatory
235 12401 - Disclosure - Operating Cash Flow Network

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236 Implied Table Table

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237 Consolidated Cash Flows Statement Abstract ifrs-full:StatementOfCashFlowsAbstract
238 Operating Cash Flow Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
239 12501 - Disclosure - Operating lease obligations Network

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240 Implied Table Table

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241 Operating lease obligations Abstract ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
242 Operating lease obligations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfLeasesExplanatory
243 12601 - Disclosure - Off-balance sheet arrangements Network

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244 Implied Table Table

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245 Off-balance sheet arrangements Abstract ifrs-full:DisclosureOfContingentLiabilitiesAbstract
246 Off-balance sheet arrangements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsExplanatory
247 12701 - Disclosure - Contingent assets and liabilities Network

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248 Implied Table Table

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249 Contingent assets and liabilities Abstract glpg:DisclosureOfContingentAssetsAndLiabilitiesAbstract
250 Contingent assets and liabilities Concept (Text Block (HTML)) For Period glpg:DisclosureOfContingentAssetsAndLiabilitiesExplanatory
251 12801 - Disclosure - Retirement benefit plans Network

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252 Implied Table Table

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253 Retirement benefit plans Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
254 Retirement benefit plans Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
255 12901 - Disclosure - Warrant Plans Network

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256 Implied Table Table

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257 Warrant plans Abstract glpg:WarrantPlansAbstract
258 Warrant plans Concept (Text Block (HTML)) For Period glpg:DisclosureOfWarrantsPlansTextBlock
259 13001 - Disclosure - Related parties Network

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260 Implied Table Table

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261 Related parties Abstract ifrs-full:RelatedPartyTransactionsAbstract
262 Related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
263 13101 - Disclosure - Consolidated companies as of December 31, 2018 Network

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264 Implied Table Table

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265 Consolidated companies as of December 31, 2018 Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
266 Consolidated companies as of December 31, 2018 Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
267 13201 - Disclosure - Financial risk management Network

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268 Implied Table Table

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269 Financial risk management Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
270 Financial risk management Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
271 13301 - Disclosure - Auditor's remuneration Network

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272 Implied Table Table

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273 Auditor's remuneration Abstract ifrs-full:AuditorsRemunerationAbstract
274 Auditor's remuneration Concept (Text Block (HTML)) For Period glpg:DisclosureOfAuditorsRemunerationTextBlock
275 13401 - Disclosure - Events after balance sheet date Network

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276 Implied Table Table

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277 Events after balance sheet date Abstract glpg:DisclosureOfEventsAfterReportingPeriodAbstract
278 Events after balance sheet date Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
279 20202 - Disclosure - Significant accounting policies (Policies) Network

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280 Implied Table Table

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281 Significant accounting policies Abstract glpg:DisclosureOfSignificantAccountingPoliciesAbstract
282 Basis Of Presentation And Going Concern Assumption Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForBasisOfPresentationAndGoingConcernAssumptionPolicyTextBlock
283 New Standards and Interpretations Applicable for the Annual Period Concept (Text Block (HTML)) For Period glpg:NewStandardsAndInterpretationsApplicableForAnnualPeriodPolicyTextBlock
284 Standards And Interpretations Published But Not Yet Applicable For The Anuual Period Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForStandardsAndInterpretationsPublishedButNotYetApplicableForAnnualPeriodPolicyTextBlock
285 Consolidated Reporting Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForConsolidatedReportingPolicyTextBlock
286 Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
287 Property, Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
288 Leasehold Improvements Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForLeaseholdImprovementsPolicyTextBlock
289 Assets Held Under Finance Lease Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForAssetsHeldUnderFinanceLeasePolicyTextBlock
290 Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
291 Taxation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
292 Foreign Currencies Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
293 Recognition Of Expenses Linked To Clinical Trial Milestones Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForRecognitionOfExpensesLinkedToClinicalTrialMilestonesPolicyTextBlock
294 Revenue Recognition Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
295 Interests In Joint Operations Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForInvestmentsInJointVentures
296 Equity Instruments Concept (Text Block (HTML)) For Period glpg:DescriptionOfAccountingPolicyForEquityInstrumentsPolicyTextBlock
297 Employee Benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
298 Share-Based Payments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
299 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
300 Finance and Operating Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
301 Impairment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
302 Net Income / Loss Per Share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
303 Segment Reporting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
304 30203 - Disclosure - Significant accounting policies (Tables) Network

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305 Implied Table Table

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306 Significant accounting policies Abstract glpg:DisclosureOfSignificantAccountingPoliciesAbstract
307 Impact of new accounting standards on financials Concept (Text Block (HTML)) For Period glpg:ImpactOfNewAccountingStandardsOnFinancials
308 30403 - Disclosure - Segment information (Tables) Network

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309 Implied Table Table

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310 Segment information Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
311 Segment information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
312 Summary of revenues by destination Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
313 Summary of revenues by major customers Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
314 Summary of revenues of the continuing operations by destination Concept (Text Block (HTML)) For Period glpg:DisclosureOfSegmentsRevenueOfContinuingOperationsByDestination
315 30503 - Disclosure - Total revenues and other income (Tables) Network

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316 Implied Table Table

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317 Total revenues and other income Abstract glpg:DisclosureOfTotalRevenuesAndOtherIncomeAbstract
318 Schedule of revenues Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory
319 Summary of upfront payment recognition Concept (Text Block (HTML)) For Period glpg:DisclosureOfUpfrontPaymentRecognitionTableTextBlock
320 Schedule of other income Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory
321 30603 - Disclosure - Operating costs (Tables) Network

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322 Implied Table Table

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323 Operating costs Abstract ifrs-full:ExpenseByNatureAbstract
324 Summary of research and development expenditure Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfResearchAndDevelopmentExpenseExplanatory
325 Summary of R&D expenses under alliance and own funded R&D Concept (Text Block (HTML)) For Period glpg:DisclosureOfResearchAndDevelopmentExpenditureUnderAllianceAndOwnFundedExpenses
326 Summary of research and development expenditure by program Concept (Text Block (HTML)) For Period glpg:DisclosureOfResearchAndDevelopmentExpenditureByProgram
327 Summary of general and administrative expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralAndAdministrativeExpenseExplanatory
328 Summary of sales and marketing expenses Concept (Text Block (HTML)) For Period glpg:DisclosureOfSalesAndMarketingExpensesTableTextBlock
329 30703 - Disclosure - Staff costs (Tables) Network

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330 Implied Table Table

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331 Staff costs Abstract ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
332 Staff costs Concept (Text Block (HTML)) For Period glpg:DisclosureOfDetailedInformationAboutStaffCostsTableTextBlock
333 30803 - Disclosure - Fair value re-measurement of share subscription agreement (Tables) Network

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334 Implied Table Table

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335 Fair value re-measurement of share subscription agreement Abstract ifrs-full:DisclosureOfOffsettingOfFinancialAssetsAbstract
336 Schedule of changes in fair value of derivative financial asset instrument Concept (Text Block (HTML)) For Period glpg:DisclosureOfFairValueReMeasurementOfDerivativeFinancialAssetsTableTextBlock
337 30903 - Disclosure - Other financial income / expenses (Tables) Network

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338 Implied Table Table

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339 Other financial income / expenses Abstract ifrs-full:MaterialIncomeAndExpenseAbstract
340 Schedule of other financial income and expense Concept (Text Block (HTML)) For Period glpg:DisclosureOfFinanceIncomeExpenseTableTextBlock
341 31003 - Disclosure - Taxes (Tables) Network

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342 Implied Table Table

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343 Taxes Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
344 Taxes recognized in profit or loss Concept (Text Block (HTML)) For Period glpg:DisclosureOfTaxRecognizedInProfitLossExplanatory
345 Tax Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTaxReceivablesAndPayablesExplanatory
346 Tax reconciled to the accounting result Concept (Text Block (HTML)) For Period glpg:DisclosureOfTaxReconciliationToAccountingResultExplanatory
347 31103 - Disclosure - Income/ loss per share (Tables) Network

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348 Implied Table Table

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349 Income/ loss per share Abstract ifrs-full:EarningsPerShareAbstract
350 Schedule of income / loss per share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
351 31203 - Disclosure - Intangible assets (Tables) Network

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352 Implied Table Table

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353 Intangible assets Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
354 Schedule of intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
355 31303 - Disclosure - Property, plant and equipment (Tables) Network

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356 Implied Table Table

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357 Property, plant and equipment Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
358 Schedule of property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
359 31403 - Disclosure - Other non-current assets (Tables) Network

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360 Implied Table Table

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361 Other non-current assets Abstract glpg:OtherNoncurrentAssetsAbstract
362 Schedule of other non-current assets Concept (Text Block (HTML)) For Period glpg:DisclosureOfDetailedInformationAboutOtherNoncurrentAssetsTableTextBlock
363 Schedule of financial assets held at fair value through profit or loss Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory
364 31503 - Disclosure - Research and Development incentives receivables (Tables) Network

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 http://www.glpg.com/role/DisclosureResearchAndDevelopmentIncentivesReceivablesTables
365 Implied Table Table

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367 Schedule of the classifications of R&D incentives receivables Concept (Text Block (HTML)) For Period glpg:DisclosureOfClassificationsOfResearchAndDevelopmentIncentivesReceivablesTableTextBlock
368 Schedule of maturities of non-current R&D incentives receivables Concept (Text Block (HTML)) For Period glpg:DisclosureOfMaturitiesOfResearchAndDevelopmentIncentivesReceivablesTableTextBlock
369 31603 - Disclosure - Trade and other receivables and other current assets (Tables) Network

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370 Implied Table Table

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372 Schedule of trade and other receivables and other current assets Concept (Text Block (HTML)) For Period glpg:DisclosureOfTradeAndOtherReceivablesAndOtherCurrentAssetsTextBlock
373 31703 - Disclosure - Cash and cash equivalents (Tables) Network

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*

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374 Implied Table Table

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376 Schedule of cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
377 31803 - Disclosure - Share capital (Tables) Network

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378 Implied Table Table

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379 Share capital Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
380 Schedule of reconciliation of share capital Concept (Text Block (HTML)) For Period glpg:DisclosureOfReconciliationOfShareCapitalTableTextBlock
381 Schedule of history of the share capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIssuedCapitalExplanatory
382 Summary of capital increases Concept (Text Block (HTML)) For Period glpg:DisclosureOfSummaryOfCapitalIncreasesTableTextBlock
383 Summary of other information Concept (Text Block (HTML)) For Period glpg:DisclosureOfOtherInformationTableTextBlock
384 31903 - Disclosure - Other reserves (Tables) Network

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385 Implied Table Table

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386 Other reserves Abstract ifrs-full:OtherReservesAbstract
387 Schedule of other reserves Concept (Text Block (HTML)) For Period glpg:ScheduleOfOtherReservesActivityTableTextBlock
388 32003 - Disclosure - Translation differences (Tables) Network

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*

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389 Implied Table Table

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390 Translation differences Abstract ifrs-full:ExchangeDifferencesOnTranslationAbstract
391 Schedule of translation differences Concept (Text Block (HTML)) For Period glpg:ScheduleOfReserveOfExchangeDifferencesOnTranslationActivityTableTextBlock
392 32103 - Disclosure - Deferred tax (Tables) Network

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*

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393 Implied Table Table

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395 Schedule of deferred tax Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
396 32203 - Disclosure - Trade and other liabilities (Tables) Network

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*

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397 Implied Table Table

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398 Trade and other liabilities Abstract ifrs-full:TradeAndOtherPayablesAbstract
399 Schedule of trade and other liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccruedExpensesAndOtherLiabilitiesExplanatory
400 32303 - Disclosure - Deferred income (Tables) Network

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401 Implied Table Table

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402 Deferred income Abstract glpg:DeferredIncomeAbstract
403 Schedule of deferred income Concept (Text Block (HTML)) For Period glpg:DisclosureOfDeferredIncomeTableTextBlock
404 32403 - Disclosure - Operating Cash Flow (Tables) Network

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*

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405 Implied Table Table

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406 Consolidated Cash Flows Statement Abstract ifrs-full:StatementOfCashFlowsAbstract
407 Adjustments related to operating cash flow Concept (Text Block (HTML)) For Period glpg:AdjustmentsRelatedToOperatingCashFlowTableTextBlock
408 32503 - Disclosure - Operating lease obligations (Tables) Network

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*

 http://www.glpg.com/role/DisclosureOperatingLeaseObligationsTables
409 Implied Table Table

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410 Operating lease obligations Abstract ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
411 Schedule of minimum lease payments under operating leases recognized in the income statement for the year Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
412 32603 - Disclosure - Off-balance sheet arrangements (Tables) Network

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*

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413 Implied Table Table

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415 Schedule of outstanding obligations for future minimum rent payments and purchase commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
416 32803 - Disclosure - Retirement benefit plans (Tables) Network

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417 Implied Table Table

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419 Obligations included in the balance sheet Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
420 Disclosure of present value of gross obligation Concept (Text Block (HTML)) For Period glpg:DisclosureOfPresentValueOfGrossObligation
421 Fair value of plan assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
422 Disclosure of amounts recognized in profit or loss Concept (Text Block (HTML)) For Period glpg:DisclosureOfAmountsRecognizedInProfitOrLoss
423 Obligation reconciled in the balance sheet Concept (Text Block (HTML)) For Period glpg:DisclosureOfObligationsReconciledInBalanceSheet
424 Disclosure of main actuarial assumptions Concept (Text Block (HTML)) For Period glpg:DisclosureOfActuarialAssumptions
425 Breakdown of defined benefit obligation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAdditionalInformationAboutDefinedBenefitPlansExplanatory
426 Major categories of plan assets Concept (Text Block (HTML)) For Period glpg:DisclosureOfMajorCategoriesOfPlanAssets
427 Sensitivity analysis on discount rate: effect on obligation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
428 32903 - Disclosure - Warrant plans (Tables) Network

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429 Implied Table Table

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430 Warrant plans Abstract glpg:WarrantPlansAbstract
431 Schedule of summary of warrants outstanding and exercisable per warrant plan Concept (Text Block (HTML)) For Period glpg:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsPerPlanTableTextBlock
432 Schedule of summary of warrants outstanding and exercisable Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory
433 Schedule of summary of warrants outstanding by category Concept (Text Block (HTML)) For Period glpg:DisclosureOfNumberOfOtherEquityInstrumentsByCategory
434 Overview of outstanding warrants Concept (Text Block (HTML)) For Period glpg:OverviewOfOutstandingWarrantsTableTextBlock
435 33003 - Disclosure - Related parties (Tables) Network

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*

 http://www.glpg.com/role/DisclosureRelatedPartiesTables
436 Implied Table Table

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438 Summary of remuneration package of the members of key management personnel Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory
439 33103 - Disclosure - Consolidated companies as of December 31, 2018 (Tables) Network

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440 Implied Table Table

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441 Consolidated companies as of December 31, 2018 Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
442 Disclosure of voting rights in consolidated companies Concept (Text Block (HTML)) For Period glpg:DisclosureOfVotingInterestInSubsidiariesTableTextBlock
443 33203 - Disclosure - Financial risk management (Tables) Network

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444 Disclosure of detailed information about financial instruments [table] Table

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447 Foreign exchange risk Member ifrs-full:CurrencyRiskMember
448 Financial risk management LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
449 Disclosure of categories of material financial assets and liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfFinancialInstrumentsExplanatory
450 Disclosure of aging balance of receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCreditRiskExposureExplanatory
451 Disclosure of sensitivity of exchange rate risk Concept (Text Block (HTML)) For Period ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk
452 40101 - Disclosure - General information (Details) Network

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453 Implied Table Table

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454 General information Abstract glpg:DisclosureOfGeneralInformationAboutFinancialStatementsAbtract
455 Number of employees Concept (Decimal) As Of ifrs-full:NumberOfEmployees
456 40201 - Disclosure - Significant accounting policies (Details) Network

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 http://www.glpg.com/role/DisclosureSignificantAccountingPoliciesDetails
457 Disclosure of detailed information about accounting policy adoption [table] Table

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467 Accumulated losses Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
468 Increase in deferred income Concept (Monetary) For Period Credit glpg:IncreaseDecreaseInContractLiabilities
469 Cumulative fair value loss recognized in other comprehensive income Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
470 Fair value loss reclassified to accumulated losses Concept (Monetary) For Period Credit glpg:FairValueGainsLossesOnFinancialAssetsReclassifiedOutOfAvailableForSaleFinancialAssetsRecognisedInEquity
471 Right-of-use assets Concept (Monetary) As Of Debit ifrs-full:RightofuseAssets
472 Lease liabilities Concept (Monetary) As Of Credit ifrs-full:LeaseLiabilities
473 Depreciation charges and interest cost Concept (Monetary) For Period Debit glpg:DepreciationAndInterestExpenseOnLeaseLiabilities
474 Operating result Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
475 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
476 Cash flow from operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
477 Cash flows from financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
478 40202 - Disclosure - Significant accounting policies - Adoption of IFRS 15 (Details) Network

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479 Disclosure of initial application of standards or interpretations [table] Table

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 ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
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482 IAS18 Member glpg:Ias18StandardMember
483 Effect of change between IFRS 15 and IAS 18 Member glpg:EffectOfChangeBetweenIfrs15AndIas18Member
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485 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
486 Loss before tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
487 Income taxes Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
488 Net income / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
489 Basic and diluted loss per share Concept (Share) For Period glpg:IfrsBasicAndDilutedEarningsLossPerShare
490 Deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
491 Accumulated losses Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
492 40203 - Disclosure - Significant accounting policies - Intangible Assets (Details) Network

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493 Disclosure of detailed information about intangible assets [table] Table

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496 Customer relationships Member ifrs-full:CustomerrelatedIntangibleAssetsMember
497 In process technology Member ifrs-full:TechnologybasedIntangibleAssetsMember
498 Software and databases Member ifrs-full:ComputerSoftwareMember
499 Brands, licenses, patents and know-how Member glpg:BrandsLicensesPatentsAndKnowHowMember
500 Range [axis] Axis ifrs-full:RangeAxis
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502 Minimum Member ifrs-full:BottomOfRangeMember
503 Maximum Member ifrs-full:TopOfRangeMember
504 Disclosure of detailed information about intangible assets LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
505 Useful lives Concept (xbrli:durationItemType) For Period glpg:UsefulLivesIntangibleAssetsOtherThanGoodwill
506 40204 - Disclosure - Significant accounting policies - Property, Plant and Equipment (Details) Network

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507 Disclosure of detailed information about property, plant and equipment [table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
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510 Minimum Member ifrs-full:BottomOfRangeMember
511 Maximum Member ifrs-full:TopOfRangeMember
512 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
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514 Installation and machinery [member] Member glpg:InstallationAndMachineryMember
515 Furniture, fixtures & vehicles Member glpg:FurnitureFixturesAndVehiclesMember
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517 Useful lives Concept (xbrli:durationItemType) For Period glpg:UsefulLivesPropertyPlantAndEquipment
518 40205 - Disclosure - Significant accounting policies - Employee Benefits (Details) Network

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519 Implied Table Table

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521 Percentage change of share price worse than change in Next BioTech Index Concept (Percent) For Period glpg:PercentageChangeOfSharePriceWorseThanChangeInNextBiotechIndex
522 40301 - Disclosure - Critical accounting estimates and judgments (Details) Network

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523 Disclosure of Critical Accounting Estimates and Judgements [Table] Table

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526 Switzerland, Croatia, United States and Netherlands Member glpg:SwitzerlandCroatiaUnitedStatesAndNetherlandsMember
527 Belgium Member country:BE
528 Ifrs Scenario [Axis] Axis glpg:IfrsScenarioAxis
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530 Forecast Member glpg:IfrsScenarioForecastMember
531 Critical accounting estimates and judgements LineItems glpg:DisclosureOfCriticalAccountingEstimatesAndJudgementsLineItems
532 Corporate income taxes Abstract glpg:CorporateIncomeTaxesAbstract
533 Number of Subsidiaries Concept (Integer) As Of glpg:NumberOfSubsidiariesHavingSufficientProfits
534 Statutory amount of tax losses carried forward Concept (Monetary) As Of Debit glpg:CarryForwardOfStatutoryTaxLosses
535 Tax losses that can be compensable with future statutory taxable profits for a limited period Concept (Monetary) For Period Debit glpg:NonCompensableStatutoryTaxLosses
536 IID carryforward amount Concept (Monetary) For Period Debit glpg:InnovationIncomeDeductionCarryforward
537 IID tax rate Concept (Percent) For Period glpg:InnovationTimeDeductionTaxRate
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539 Limit to taxable base after application of the first basket Concept (Monetary) For Period Debit glpg:LimitToTaxableBaseAfterApplicationOfFirstBasket
540 Percentage of deductions used in second basket on amounts above €1 million Concept (Percent) For Period glpg:ExcessOfThresholdNotionalIncomeDeductionAsDeductionOfSecondBasketPercentage
541 40401 - Disclosure - Segment information (Details) Network

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542 Disclosure of operating segments [table] Table

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545 Research and Development Segment [Member] Member glpg:ResearchAndDevelopmentSegmentMember
546 Fee For Services Segment [Member] Member glpg:FeeForServicesSegmentMember
547 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
548 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
549 Operating segments [member] Member ifrs-full:OperatingSegmentsMember
550 Elimination of intersegment amounts [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
551 Unallocated amounts [member] Member ifrs-full:UnallocatedAmountsMember
552 Warrant costs [member] Member glpg:UnallocatedAmountsWarrantCostsMember
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555 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
556 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
557 Total revenues and other income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
558 Operating gain / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
559 Financial (expenses)/income Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
560 Income / loss (-) before tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
561 Income taxes Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
562 Net income / loss (-) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
563 40402 - Disclosure - Segment information - Revenues by destination (Details) Network

*

*

 http://www.glpg.com/role/DisclosureSegmentInformationRevenuesByDestinationDetails
564 Disclosure of geographical areas [table] Table

*

*

 ifrs-full:DisclosureOfGeographicalAreasTable
565 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
566 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
567 United States Member country:US
568 Europe Member srt:EuropeMember
569 Asia Pacific Member srt:AsiaPacificMember
570 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
571 Percentage of entity's revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
572 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
573 40403 - Disclosure - Segment information - Major customers (Details) Network

*

*

 http://www.glpg.com/role/DisclosureSegmentInformationMajorCustomersDetails
574 Disclosure of major customers [table] Table

*

*

 ifrs-full:DisclosureOfMajorCustomersTable
575 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
576 Customers [member] Member ifrs-full:MajorCustomersMember
577 Gilead Member glpg:GileadMember
578 AbbVie Member glpg:AbbvieCustomerMember
579 Novartis Member glpg:NovartisMember
580 Les Laboratoires Servier Member glpg:LesLaboratoiresServierMember
581 Revenues by major customers Member glpg:RevenuesByMajorCustomersMember
582 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
583 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
584 United States Member country:US
585 Europe Member srt:EuropeMember
586 Disclosure of major customers [line items] LineItems ifrs-full:DisclosureOfMajorCustomersLineItems
587 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
588 Percentage of entity's revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
589 40404 - Disclosure - Segment information - Revenues of continuing operations (Details) Network

*

*

 http://www.glpg.com/role/DisclosureSegmentInformationRevenuesOfContinuingOperationsDetails
590 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
591 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
592 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
593 Galapagos NV (Belguim) Member glpg:GalapagosNvMember
594 Galapagos SASU (France) Member glpg:GalapagosSasuMember
595 Fidelta d.o.o. (Croatia) Member glpg:FideltaDooMember
596 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
597 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
598 40405 - Disclosure - Segment information - Non-current assets by location (Details) Network

*

*

 http://www.glpg.com/role/DisclosureSegmentInformationNonCurrentAssetsByLocationDetails
599 Disclosure of geographical areas [table] Table

*

*

 ifrs-full:DisclosureOfGeographicalAreasTable
600 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
601 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
602 Belgium Member country:BE
603 France Member country:FR
604 Croatia Member country:HR
605 The Netherlands Member country:NL
606 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
607 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
608 40501 - Disclosure - Total revenues and other income - Summary of revenues (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTotalRevenuesAndOtherIncomeSummaryOfRevenuesDetails
609 Implied Table Table

*

*

 implied:Table
610 Total revenues and other income Abstract glpg:DisclosureOfTotalRevenuesAndOtherIncomeAbstract
611 Recognition of non-refundable upfront payments and license fees Concept (Monetary) For Period Credit glpg:RecognitionOfNonRefundableUpfrontPayments
612 Milestone payments Concept (Monetary) For Period Credit glpg:MilestonePayments
613 Reimbursement income Concept (Monetary) For Period Credit glpg:ReimbursementIncome
614 Other revenues Concept (Monetary) For Period Credit ifrs-full:OtherRevenue
615 Total revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
616 Total revenues Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
617 40502 - Disclosure - Total revenues and other income - Recognition of payments (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTotalRevenuesAndOtherIncomeRecognitionOfPaymentsDetails
618 IFRS Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Table

*

*

 glpg:IfrsScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable
619 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
620 Currently stated [member] Member ifrs-full:RestatedMember
621 IAS18 Member glpg:Ias18StandardMember
622 IFRS 15 Member glpg:Ifrs15Member
623 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
624 Counterparties [member] Member ifrs-full:CounterpartiesMember
625 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
626 Servier Member glpg:ServierMember
627 AbbVie Member glpg:AbbvieMember
628 Novartis Member glpg:NovartisMember
629 ifrs Type Of Arrangement [Axis] Axis glpg:IfrsTypeOfArrangementAxis
630 ifrs type of arrangement [domain] Member glpg:IfrsTypeOfArrangementDomain
631 Upfront and Milestone Payments and License Fees [Member] Member glpg:UpfrontAndMilestonePaymentsAndLicenseFeesMember
632 Upfront and Milestone Payments and License Fees Current Period [Member] Member glpg:UpfrontAndMilestonePaymentsAndLicenseFeesCurrentPeriodMember
633 Upfront Payments and License Fees, Current Period [Member] Member glpg:UpfrontPaymentsAndLicenseFeesCurrentPeriodMember
634 Collaboration Agreement for MOR106, Upfront Payment, Current Period [Member] Member glpg:CollaborationAgreementForMor106UpfrontPaymentsCurrentPeriodMember
635 Collaboration agreement for CF, Upfront payment, Current Period [member] Member glpg:CollaborationAgreementForCfUpfrontPaymentCurrentPeriodMember
636 Milestone Payments for Current Period [Member] Member glpg:MilestonePaymentsForCurrentPeriodMember
637 Collaboration agreement for filgotinib, Milestone payments, Current Period [member] Member glpg:CollaborationAgreementForFilgotinibMilestonePaymentsCurrentPeriodMember
638 Collaboration agreement for CF, Milestone payments, Current Period [member] Member glpg:CollaborationAgreementForCfMilestonePaymentsCurrentPeriodMember
639 Collaboration agreement for osteoarthritis, Milestone payment, Current Period [member] Member glpg:CollaborationAgreementForOsteoarthritisMilestonePaymentCurrentPeriodMember
640 Upfront and Milestone Payments and License Fees, Prior Period [Member] Member glpg:UpfrontAndMilestonePaymentsAndLicenseFeesPriorPeriodMember
641 Upfront Payments and License Fees, Prior Period [Member] Member glpg:UpfrontPaymentsAndLicenseFeesPriorPeriodMember
642 Collaboration agreement for filgotinib, Upfront payment, Prior Period [member] Member glpg:CollaborationAgreementForFilgotinibUpfrontPaymentPriorPeriodMember
643 Collaboration agreement for filgotinib, Subscription agreement, Prior Period [member] Member glpg:CollaborationAgreementForFilgotinibSubscriptionAgreementPriorPeriodMember
644 Collaboration agreement for osteoarthritis, License fee, Prior Period [member] Member glpg:CollaborationAgreementForOsteoarthritisLicenseFeePriorPeriodMember
645 Collaboration agreement for CF, Upfront payments, Prior Period [member] Member glpg:CollaborationAgreementForCfUpfrontPaymentsPriorPeriodMember
646 Milestone Payments for Prior Period [Member] Member glpg:MilestonePaymentsForPriorPeriodMember
647 Collaboration agreement for filgotinib, Milestone payments, Prior Period [member] Member glpg:CollaborationAgreementForFilgotinibMilestonePaymentsPriorPeriodMember
648 Collaboration agreement for CF, Milestone payments, Prior Period [member] Member glpg:CollaborationAgreementForCfMilestonePaymentsPriorPeriodMember
649 IFRS Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] LineItems glpg:IfrsCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
650 Upfront payments, license fees, and milestones received Concept (Monetary) For Period Debit glpg:UpfrontPaymentsLicenseFeesAndMilestonesReceived
651 Revenue recognized Concept (Monetary) For Period Credit ifrs-full:Revenue
652 Deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
653 Deferred income reclassified from equity Concept (Monetary) As Of Credit glpg:DeferredIncomeReclassifiedFromEquity
654 40503 - Disclosure - Total revenues and other income - Disaggregation of revenues (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTotalRevenuesAndOtherIncomeDisaggregationOfRevenuesDetails
655 Disclosure of disaggregation of revenue from contracts with customers [table] Table

*

*

 ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
656 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
657 Currently stated [member] Member ifrs-full:RestatedMember
658 IFRS 15 Member glpg:Ifrs15Member
659 IAS18 Member glpg:Ias18StandardMember
660 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
661 Counterparties [member] Member ifrs-full:CounterpartiesMember
662 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
663 AbbVie Member glpg:AbbvieMember
664 Novartis Member glpg:NovartisMember
665 Servier Member glpg:ServierMember
666 Timing of transfer of goods or services [axis] Axis ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
667 Timing of transfer of goods or services [member] Member ifrs-full:TimingOfTransferOfGoodsOrServicesMember
668 Over time Member ifrs-full:GoodsOrServicesTransferredOverTimeMember
669 Point in time Member ifrs-full:GoodsOrServicesTransferredAtPointInTimeMember
670 Segments [axis] Axis ifrs-full:SegmentsAxis
671 Segments [member] Member ifrs-full:SegmentsMember
672 Research and Development Segment [Member] Member glpg:ResearchAndDevelopmentSegmentMember
673 Fee For Services Segment [Member] Member glpg:FeeForServicesSegmentMember
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675 Recognition of non-refundable upfront payments and license fees Concept (Monetary) For Period Credit glpg:RecognitionOfNonRefundableUpfrontPayments
676 Milestone payments Concept (Monetary) For Period Credit glpg:MilestonePayments
677 Reimbursement income Concept (Monetary) For Period Credit glpg:ReimbursementIncome
678 Other reimbursement income Concept (Monetary) For Period Credit glpg:OtherReimbursementIncome
679 Other revenues Concept (Monetary) For Period Credit ifrs-full:OtherRevenue
680 Other Revues Concept (Monetary) For Period Credit glpg:OtherMiscellaneousRevenue
681 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
682 40504 - Disclosure - Total revenues and other income - Summary of upfront payments recognized (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTotalRevenuesAndOtherIncomeSummaryOfUpfrontPaymentsRecognizedDetails
683 IFRS Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Table

*

*

 glpg:IfrsScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable
684 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
685 Counterparties [member] Member ifrs-full:CounterpartiesMember
686 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
687 ThromboGenics Member glpg:ThrombogenicsMember
688 Sirion Biotech Member glpg:SirionBiotechMember
689 Servier Member glpg:ServierMember
690 ifrs Type Of Arrangement [Axis] Axis glpg:IfrsTypeOfArrangementAxis
691 ifrs type of arrangement [domain] Member glpg:IfrsTypeOfArrangementDomain
692 Collaboration Agreement For Filgotinib [Member] Member glpg:CollaborationAgreementForFilgotinibMember
693 Collaboration Agreement For Osteoarthritis [Member] Member glpg:CollaborationAgreementForOsteoarthritisMember
694 Second Collaboration Agreement For Filgotinib [Member] Member glpg:SecondCollaborationAgreementForFilgotinibMember
695 License Agreement For Integrin Antagonists [Member] Member glpg:LicenseAgreementForIntegrinAntagonistsMember
696 License Agreement For RNA Interference Technologies [Member] Member glpg:LicenseAgreementForRnaInterferenceTechnologiesMember
697 Recognition of non-refundable upfront payments and license fees [member] Member glpg:RecognitionOfNonRefundableUpfrontPaymentsAndLicenseFeesMember
698 IFRS Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] LineItems glpg:IfrsCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
699 Deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
700 Non-current deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
701 Upfront and license fees received Concept (Monetary) For Period Debit glpg:UpfrontPaymentsAndLicenseFeesReceived
702 Recognition of non-refundable upfront payments and license fees Concept (Monetary) For Period Credit glpg:RecognitionOfNonRefundableUpfrontPayments
703 40505 - Disclosure - Total revenues and other income - Summary of other income (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTotalRevenuesAndOtherIncomeSummaryOfOtherIncomeDetails
704 Implied Table Table

*

*

 implied:Table
705 Total revenues and other income Abstract glpg:DisclosureOfTotalRevenuesAndOtherIncomeAbstract
706 Grant income Concept (Monetary) For Period Credit glpg:GrantIncome
707 Other income Concept (Monetary) For Period Credit glpg:MiscellaneousOtherIncome
708 Total other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
709 40601 - Disclosure - Operating costs - Summary of research and development expenditure (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingCostsSummaryOfResearchAndDevelopmentExpenditureDetails
710 Implied Table Table

*

*

 implied:Table
711 Operating costs Abstract ifrs-full:ExpenseByNatureAbstract
712 Personnel costs Concept (Monetary) For Period Debit glpg:ResearchAndDevelopmentPersonnelCosts
713 Subcontracting Concept (Monetary) For Period Debit glpg:ResearchAndDevelopmentSubcontracting
714 Disposables and lab fees and premise costs Concept (Monetary) For Period Debit glpg:ResearchAndDevelopmentDisposablesAndLabFeesAndPremisesCosts
715 Other operating expenses Concept (Monetary) For Period Debit glpg:ResearchAndDevelopmentOtherOperatingExpenses
716 Total research and development expenditure Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
717 40602 - Disclosure - Operating costs - Summary of research and development expenditure by alliance and own funded research (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingCostsSummaryOfResearchAndDevelopmentExpenditureByAllianceAndOwnFundedResearchDetails
718 Implied Table Table

*

*

 implied:Table
719 Operating costs Abstract ifrs-full:ExpenseByNatureAbstract
720 Research and development under alliance Concept (Monetary) For Period Debit glpg:ResearchAndDevelopmentExpenditureCostsUnderAlliance
721 Galapagos funded research and development Concept (Monetary) For Period Debit glpg:ResearchAndDevelopmentExpenditureOwnFunded
722 Total research and development expenditure Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
723 40603 - Disclosure - Operating costs - Summary of research and development expenditure by individual project (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingCostsSummaryOfResearchAndDevelopmentExpenditureByIndividualProjectDetails
724 Research and Development [Table] Table

*

*

 glpg:ResearchAndDevelopmentTable
725 Research and Development Program [Axis] Axis glpg:ResearchAndDevelopmentProgramAxis
726 Research and Development [Domain] Member glpg:ResearchAndDevelopmentDomain
727 Filgotinib Program [Member] Member glpg:FilgotinibProgramMember
728 CF program (partnered) Member glpg:CfProgramMember
729 IPF program on GLPG1690 (proprietary) Member glpg:IpfProgramMember
730 OA program on GLPG1972 (partnered) Member glpg:OaProgramMember
731 AtD program on MOR106 (partnered) Member glpg:AtdProgramMember
732 Other Member glpg:OtherResearchAndDevelopmentProgramMember
733 Research and Development [Line Items] LineItems glpg:ResearchAndDevelopmentLineItems
734 Total research and development expenditure Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
735 40604 - Disclosure - Operating costs - Summary of general and administrative expenses (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingCostsSummaryOfGeneralAndAdministrativeExpensesDetails
736 Implied Table Table

*

*

 implied:Table
737 Operating costs Abstract ifrs-full:ExpenseByNatureAbstract
738 Personnel costs and directors fees Concept (Monetary) For Period Debit glpg:GeneralAndAdministrativePersonnelCostsAndDirectorFees
739 Other operating expenses Concept (Monetary) For Period Debit glpg:GeneralAndAdministrativeOtherOperatingExpenses
740 General and administrative expenses Concept (Monetary) For Period Debit ifrs-full:GeneralAndAdministrativeExpense
741 40605 - Disclosure - Operating costs - Summary of sales and marketing expenses (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingCostsSummaryOfSalesAndMarketingExpensesDetails
742 Implied Table Table

*

*

 implied:Table
743 Operating costs Abstract ifrs-full:ExpenseByNatureAbstract
744 Personnel costs Concept (Monetary) For Period Debit glpg:SalesAndMarketingPersonnelCosts
745 Other operating expenses Concept (Monetary) For Period Debit glpg:SalesAndMarketingOtherOperatingExpenses
746 Total sales and marketing expenses Concept (Monetary) For Period Debit ifrs-full:SalesAndMarketingExpense
747 40701 - Disclosure - Staff costs (Details) Network

*

*

 http://www.glpg.com/role/DisclosureStaffCostsDetails
748 Implied Table Table

*

*

 implied:Table
749 Staff costs Abstract ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
750 Wages and salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
751 Social security costs Concept (Monetary) For Period Debit ifrs-full:SocialSecurityContributions
752 Pension costs Concept (Monetary) For Period Debit glpg:PostEmploymentBenefitExpenseDefinedContributionPlansAndDefinedBenefitPlans
753 Other personnel costs Concept (Monetary) For Period Debit ifrs-full:OtherEmployeeExpense
754 Total personnel costs Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
755 Costs for warrants granted Concept (Monetary) For Period Debit glpg:OtherPersonnelCostsWarrantsGranted
756 40801 - Disclosure - Fair value re-measurement of share subscription agreement - Financial assets (Details) Network

*

*

 http://www.glpg.com/role/DisclosureFairValueReMeasurementOfShareSubscriptionAgreementFinancialAssetsDetails
757 Disclosure of fair value measurement of assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
758 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
759 Hedging instruments [member] Member ifrs-full:HedgingInstrumentsMember
760 Derivatives [member] Member ifrs-full:DerivativesMember
761 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
762 Counterparties [member] Member ifrs-full:CounterpartiesMember
763 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
764 Measurement [axis] Axis ifrs-full:MeasurementAxis
765 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
766 At fair value Member ifrs-full:AtFairValueMember
767 Recurring fair value measurement Member ifrs-full:RecurringFairValueMeasurementMember
768 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
769 Payment composed of license fee and equity investment Concept (Monetary) For Period Debit glpg:PaymentComposedOfLicenseFeeAndEquityInvestmentGlobalCollaborationAgreement
770 Upfront payments Concept (Monetary) For Period Debit glpg:UpfrontPaymentsAndLicenseFeesReceived
771 Share subscription increase Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
772 Price per share including issuance premium Concept (Share) For Period glpg:InitialPricePerShareEquityInvestmentReceivedGlobalCollaborationAgreement
773 Net fair value gain Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnHedgingInstrument
774 Fair value at inception Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
775 Movement of period (recognized in the income statement) Concept (Monetary) For Period Credit ifrs-full:GainsLossesRecognisedInProfitOrLossAttributableToChangeInUnrealisedGainsOrLossesForEntitysOwnEquityInstrumentsHeldAtEndOfPeriodFairValueMeasurement
776 Derecognition of the financial asset through the share premium account Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughDerecognitionFinancialAssets
777 Fair value at the end Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
778 40901 - Disclosure - Other financial income / expenses (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOtherFinancialIncomeExpensesDetails
779 Implied Table Table

*

*

 implied:Table
780 Other financial income / expenses Abstract ifrs-full:MaterialIncomeAndExpenseAbstract
781 Other financial income: Abstract glpg:OtherFinanceIncomeAbstract
782 Interest on bank deposit Concept (Monetary) For Period Credit ifrs-full:InterestIncomeOnDeposits
783 Effect of discounting long term R&D incentives receivables Concept (Monetary) For Period Credit glpg:EffectOfDiscountingLongTermResearchAndDevelopmentIncentivesReceivables
784 Currency exchange gain Concept (Monetary) For Period Credit glpg:CurrencyExchangeGainOtherFinancialIncome
785 Fair value gain on financial assets held at fair value through profit or loss Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
786 Gain upon sale of financial assets held at fair value through profit or loss Concept (Monetary) For Period Credit glpg:GainsLossesOnSaleOfFinancialAssetsAtFairValueThroughProfitOrLoss
787 Other finance income Concept (Monetary) For Period Credit glpg:MiscellaneousOtherFinanceIncome
788 Total other financial income Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
789 Other financial expenses: Abstract glpg:OtherFinanceExpenseAbstract
790 Interest expenses Concept (Monetary) For Period Debit ifrs-full:InterestExpense
791 Currency exchange loss Concept (Monetary) For Period Debit glpg:CurrencyExchangeLossOtherFinancialExpenses
792 Other finance charges Concept (Monetary) For Period Debit glpg:MiscellaneousOtherFinanceExpense
793 Total other financial expense Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
794 Total other net financial expense (-)/ income Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
795 41001 - Disclosure - Taxes - Summary of income tax recognized (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTaxesSummaryOfIncomeTaxRecognizedDetails
796 Implied Table Table

*

*

 implied:Table
797 Taxes Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
798 Current tax Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
799 Deferred tax Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
800 Total taxes Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
801 41002 - Disclosure - Taxes - Schedule of tax liabilities (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTaxesScheduleOfTaxLiabilitiesDetails
802 Implied Table Table

*

*

 implied:Table
803 Taxes Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
804 Current tax payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilities
805 Total tax liabilities Concept (Monetary) As Of Credit glpg:CurrentNonCurrentTaxLiabilities
806 Number of subsidiaries operating on a cost plus basis Concept (Integer) For Period glpg:NumberOfSubsidiaries
807 41003 - Disclosure - Taxes - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTaxesNarrativeDetails
808 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
809 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
810 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
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813 Applicable tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
814 41004 - Disclosure - Taxes - Summary of income tax reconciliation (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTaxesSummaryOfIncomeTaxReconciliationDetails
815 Implied Table Table

*

*

 implied:Table
816 Taxes Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
817 Income/ loss (-) before tax Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
818 Income tax debit / credit (-), calculated using the Belgian statutory tax rate on the accounting income / loss (-) before tax (theoretical) Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
819 Tax expenses / income (-) in statement of operations (effective) Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
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823 Effect of share based payment expenses without tax impact Concept (Monetary) For Period Debit glpg:EffectOfShareBasedPaymentExpensesWithoutTaxImpact
824 Effect of consolidation eliminations without tax impact Concept (Monetary) For Period Debit glpg:TaxEffectOfConsolidationEntryWithoutTaxImpact
825 Effect of non tax deductible expenses Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
826 Effect of recognition of previously non recognized deferred tax assets Concept (Monetary) For Period Debit glpg:TaxEffectOfRecognitionOfPreviouslyNonRecognizedDeferredTaxAssets
827 Effect of change in tax rates Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
828 Effect of tax losses (utilized) reversed Concept (Monetary) For Period Debit glpg:TaxEffectFromTaxLossesUtilizedReversed
829 Effect of non recognition of deferred tax assets Concept (Monetary) For Period Debit glpg:TaxEffectFromNonRecognitionOfDeferredTaxAssets
830 Total explanations Concept (Monetary) For Period Debit glpg:AmountOfDifferencesInTaxExpenseIncomeBetweenStatutoryAndEffectiveRateExplained
831 41101 - Disclosure - Income/ loss per share (Details) Network

*

*

 http://www.glpg.com/role/DisclosureIncomeLossPerShareDetails
832 Implied Table Table

*

*

 implied:Table
833 Income/ loss per share Abstract ifrs-full:EarningsPerShareAbstract
834 Income / loss per share: Basic Abstract ifrs-full:BasicEarningsPerShareAbstract
835 Net income/ loss (-) attributable to owners of the parent (Euro, in thousands) Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
836 Weighted average number of shares for the purpose of income / loss (-) per share Concept (Shares) For Period ifrs-full:WeightedAverageShares
837 Basic income / loss (-) per share Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
838 Income / loss per share: Diluted Abstract ifrs-full:DilutedEarningsPerShareAbstract
839 Net income/ loss (-) attributable to owners of the parent (Euro, in thousands) Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
840 Weighted average number of shares for the purpose of income / loss (-) per share Concept (Shares) For Period ifrs-full:WeightedAverageShares
841 Number of dilutive potential ordinary shares Concept (Shares) For Period ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
842 Diluted income / loss (-) per share Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
843 41201 - Disclosure - Intangible assets (Details) Network

*

*

 http://www.glpg.com/role/DisclosureIntangibleAssetsDetails
844 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
845 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
846 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
847 In process technology Member ifrs-full:TechnologybasedIntangibleAssetsMember
848 Software and databases Member ifrs-full:ComputerSoftwareMember
849 Brands, licenses, patents and know-how Member glpg:BrandsLicensesPatentsAndKnowHowMember
850 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
851 Carrying amount [member] Member ifrs-full:CarryingAmountMember
852 Gross carrying amount Member ifrs-full:GrossCarryingAmountMember
853 Accumulated impairment [member] Member ifrs-full:AccumulatedImpairmentMember
854 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
855 Beginning balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
856 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
857 Amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
858 Imapirment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
859 Sales and disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsAndRetirementsIntangibleAssetsOtherThanGoodwill
860 Translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
861 Ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
862 41301 - Disclosure - Property, plant and equipment (Details) Network

*

*

 http://www.glpg.com/role/DisclosurePropertyPlantAndEquipmentDetails
863 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
864 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
865 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
866 Land and building improvements Member ifrs-full:LandAndBuildingsMember
867 Installation and machinery [member] Member glpg:InstallationAndMachineryMember
868 Furniture, fixtures & vehicles Member glpg:FurnitureFixturesAndVehiclesMember
869 Other tangible assets Member ifrs-full:OtherPropertyPlantAndEquipmentMember
870 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
871 Carrying amount [member] Member ifrs-full:CarryingAmountMember
872 Gross carrying amount Member ifrs-full:GrossCarryingAmountMember
873 Depreciations and impairment Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
874 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
875 Beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
876 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
877 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
878 Sales and disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
879 Reclassifications Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
880 Translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
881 Ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
882 41401 - Disclosure - Other non-current assets - Summary (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOtherNonCurrentAssetsSummaryDetails
883 Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [table] Table

*

*

 ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeTable
884 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
885 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
886 Belgium Member country:BE
887 The Netherlands Member country:NL
888 Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] LineItems ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeLineItems
889 Non-current restricted cash Concept (Monetary) As Of Debit ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
890 Financial assets held at fair value through profit or loss Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
891 Other non-current assets Concept (Monetary) As Of Debit glpg:OtherMiscellaneousNonCurrentAssets
892 Total other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
893 41402 - Disclosure - Other non-current assets - Financial assets held at fair value through profit or loss (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOtherNonCurrentAssetsFinancialAssetsHeldAtFairValueThroughProfitOrLossDetails
894 Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [table] Table

*

*

 ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeTable
895 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
896 Assets [member] Member ifrs-full:ClassesOfAssetsMember
897 Financial assets Member ifrs-full:FinancialAssetsMember
898 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
899 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
900 Level 1 Member ifrs-full:Level1OfFairValueHierarchyMember
901 Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] LineItems ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeLineItems
902 Available-for-sale financial assets Abstract ifrs-full:AvailableforsaleFinancialAssetsAbstract
903 Reconciliation of fair value remeasurement Abstract ifrs-full:ReconciliationOfChangesInFairValueMeasurementAssetsAbstract
904 Costs at January 1 Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtAmortisedCost
905 Additions of the year Concept (Monetary) For Period Debit ifrs-full:PurchasesFairValueMeasurementAssets
906 Disposals of the year Concept (Monetary) For Period Credit ifrs-full:SalesFairValueMeasurementAssets
907 Costs at December 31, Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtAmortisedCost
908 Fair value adjustment at January 1 Concept (Monetary) As Of Debit glpg:FairValueAdjustmentOfFinancialAssets
909 Cancellation of fair value adjustment following disposal Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
910 Fair value adjustment of the year Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInFairValueMeasurementAssets
911 Fair value adjustment at December 31, Concept (Monetary) As Of Debit glpg:FairValueAdjustmentOfFinancialAssets
912 Net book value at December 31, Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
913 41501 - Disclosure - Research and Development incentives receivables - Current and non-current (Details) Network

*

*

 http://www.glpg.com/role/DisclosureResearchAndDevelopmentIncentivesReceivablesCurrentAndNonCurrentDetails
914 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
915 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
916 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
917 France Member country:FR
918 Belgium Member country:BE
919 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
920 Non-current R&D incentives receivables-discounted value Concept (Monetary) As Of Debit glpg:NonCurrentResearchAndDevelopmentIncentivesReceivables
921 Current R&D incentives receivables Concept (Monetary) As Of Debit glpg:CurrentResearchAndDevelopmentIncentivesReceivables
922 Total R&D incentives receivables Concept (Monetary) As Of Debit glpg:ResearchAndDevelopmentIncentivesReceivables
923 41502 - Disclosure - Research and Development incentives receivables - Maturities (Details) Network

*

*

 http://www.glpg.com/role/DisclosureResearchAndDevelopmentIncentivesReceivablesMaturitiesDetails
924 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
925 Maturity [axis] Axis ifrs-full:MaturityAxis
926 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
927 Later than one year and not later than two years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
928 Later than two years and not later than three years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
929 Later than three years and not later than four years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
930 Later than four years and not later than five years [member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
931 Later than five years and not later than ten years [member] Member ifrs-full:LaterThanFiveYearsAndNotLaterThanTenYearsMember
932 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
933 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
934 France Member country:FR
935 Belgium Member country:BE
936 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
937 Non-current R&D incentives receivables-nominal value Concept (Monetary) As Of Debit glpg:NoncurrentResearchAndDevelopmentIncentivesReceivablesNominalValue
938 Non-current R&D incentives receivables-discounted value Concept (Monetary) As Of Debit glpg:NonCurrentResearchAndDevelopmentIncentivesReceivables
939 41601 - Disclosure - Trade and other receivables and other current assets (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTradeAndOtherReceivablesAndOtherCurrentAssetsDetails
940 Implied Table Table

*

*

 implied:Table
941 Trade and other receivables and other current assets Abstract glpg:TradeAndOtherReceivablesAndOtherCurrentAssets
942 Trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
943 Prepayments Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
944 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
945 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
946 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
947 Current restricted cash Concept (Monetary) As Of Debit ifrs-full:CurrentRestrictedCashAndCashEquivalents
948 Accrued income Concept (Monetary) As Of Debit ifrs-full:CurrentAccruedIncome
949 Deferred charges Concept (Monetary) As Of Debit glpg:DeferredCharges
950 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
951 Total trade and other receivables & other current assets Concept (Monetary) As Of Debit glpg:TradeAndOtherReceivablesAndOtherCurrentAsset
952 41602 - Disclosure - Trade and other receivables and other current assets - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTradeAndOtherReceivablesAndOtherCurrentAssetsNarrativeDetails
953 Implied Table Table

*

*

 implied:Table
954 Trade and other receivables and other current assets Abstract glpg:TradeAndOtherReceivablesAndOtherCurrentAssets
955 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
956 Current restricted cash Concept (Monetary) As Of Debit ifrs-full:CurrentRestrictedCashAndCashEquivalents
957 41701 - Disclosure - Cash and cash equivalents (Details) Network

*

*

 http://www.glpg.com/role/DisclosureCashAndCashEquivalentsDetails
958 Implied Table Table

*

*

 implied:Table
959 Cash and cash equivalents Abstract ifrs-full:CashAndCashEquivalentsAbstract
960 Cash at banks Concept (Monetary) As Of Debit ifrs-full:BalancesWithBanks
961 Term deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
962 Money market funds Concept (Monetary) As Of Debit ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
963 Cash on hand Concept (Monetary) As Of Debit ifrs-full:CashOnHand
964 Total cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
965 41702 - Disclosure - Cash and cash equivalents - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureCashAndCashEquivalentsNarrativeDetails
966 Implied Table Table

*

*

 implied:Table
967 Cash and cash equivalents Abstract ifrs-full:CashAndCashEquivalentsAbstract
968 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
969 Cash reported, operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
970 Cash reported, investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
971 Cash reported, financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
972 Net increase (decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
973 Proceeds from capital and share premium increases from exercise of warrants Concept (Monetary) For Period Debit glpg:ProceedsFromExerciseOfWarrants
974 foreign currency exchange rate differences Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
975 Term deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
976 Cash investments in highly liquid money market funds Concept (Monetary) As Of Debit ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
977 Research and development incentive receivables Concept (Monetary) As Of Debit glpg:ResearchAndDevelopmentIncentivesReceivables
978 Maturity period Concept (xbrli:durationItemType) For Period glpg:MaturityPeriod
979 41801 - Disclosure - Share capital - Reconciliation (Details) Network

*

*

 http://www.glpg.com/role/DisclosureShareCapitalReconciliationDetails
980 Statement of changes in equity [table] Table

*

*

 ifrs-full:StatementOfChangesInEquityTable
981 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
982 Equity [member] Member ifrs-full:EquityMember
983 Share capital Member ifrs-full:IssuedCapitalMember
984 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
985 Balance at beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
986 Share capital increase Concept (Monetary) For Period Credit glpg:IncreaseDecreaseInShareCapitalExcludingIssuancePremium
987 Costs of capital increase Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
988 Aggregate share capital Concept (Monetary) For Period Credit glpg:AggregateShareCapitalAfterTransaction
989 Costs of capital increase (accumulated) Concept (Monetary) For Period Credit glpg:AccumulatedCostOfCapital
990 Balance at end of period Concept (Monetary) As Of Credit ifrs-full:Equity
991 41802 - Disclosure - Share capital - History (Details) Network

*

*

 http://www.glpg.com/role/DisclosureShareCapitalHistoryDetails
992 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
993 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
994 Equity [member] Member ifrs-full:EquityMember
995 January 19, 2016 Member glpg:SharesIssuedOnJanuary192016Member
996 April 1, 2016 Member glpg:SharesIssuedOnApril12016Member
997 May 19, 2016 Member glpg:SharesIssuedOnMay192016Member
998 September 19, 2016 Member glpg:SharesIssuedOnSeptember192016Member
999 November 28, 2016 Member glpg:SharesIssuedOnNovember282016Member
1000 April 6, 2017 Member glpg:SharesIssuedOnApril62017Member
1001 April 21, 2017 Member glpg:SharesIssuedOnApril212017Member
1002 June 20, 2017 Member glpg:SharesIssuedOnJune202017Member
1003 September 21, 2017 Member glpg:SharesIssuedOnSeptember212017Member
1004 November 23, 2017 Member glpg:SharesIssuedOnNovember232017Member
1005 March 20, 2018 Member glpg:SharesIssuedOnMarch202018Member
1006 June 20, 218 Member glpg:SharesIssuedOnJune20218Member
1007 September 17, 2018 Member glpg:SharesIssuedOnSeptember172018Member
1008 October 3, 2018 Member glpg:SharesIssuedOnOctober32018Member
1009 November 23, 2018 Member glpg:SharesIssuedOnNovember232018Member
1010 History of the share capital LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1011 Share capital increase new shares Concept (Monetary) As Of Debit glpg:IncreaseInShareCapitalDueToIssuanceOfNewShares
1012 Share capital increase warrants Concept (Monetary) As Of Credit glpg:IncreaseInShareCapitalDueToIssuanceOfWarrants
1013 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1014 Aggregate number of shares after transaction Concept (Shares) As Of glpg:AggregateNumberOfSharesAfterTransaction
1015 Aggregate share capital after transaction Concept (Monetary) For Period Credit glpg:AggregateShareCapitalAfterTransaction
1016 41803 - Disclosure - Share capital - History - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureShareCapitalHistoryNarrativeDetails
1017 Implied Table Table

*

*

 implied:Table
1018 Share capital Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
1019 Aggregate share capital Concept (Monetary) For Period Credit glpg:AggregateShareCapitalAfterTransaction
1020 Aggregate number of shares after transaction Concept (Shares) As Of glpg:AggregateNumberOfSharesAfterTransaction
1021 41804 - Disclosure - Share capital (Details) Network

*

*

 http://www.glpg.com/role/DisclosureShareCapitalDetails
1022 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1023 Classes of ordinary shares [axis] Axis ifrs-full:ClassesOfOrdinarySharesAxis
1024 Ordinary shares [member] Member ifrs-full:OrdinarySharesMember
1025 Ordinary Shares Member glpg:OrdinarySharesNoClassMember
1026 American Depositary Receipts Member glpg:AmericanDepositaryReceiptsMember
1027 U.S. public offering Member glpg:U.s.PublicOfferingMember
1028 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1029 Equity [member] Member ifrs-full:EquityMember
1030 Share capital Member ifrs-full:IssuedCapitalMember
1031 Share premium account Member ifrs-full:SharePremiumMember
1032 January 19, 2016 : share subscription from Gilead Member glpg:January192016ShareSubscriptionFromGileadMember
1033 April 1, 2016 : exercise of warrants Member glpg:April12016ExerciseOfWarrantsMember
1034 May 19, 2016 : exercise of warrants Member glpg:May192016ExerciseOfWarrantsMember
1035 September 19, 2016 : exercise of warrants Member glpg:September192016ExerciseOfWarrantsMember
1036 November 28, 2016 : exercise of warrants Member glpg:November282016ExerciseOfWarrantsMember
1037 April 6, 2017 : exercise of warrants Member glpg:April62017ExerciseOfWarrantsMember
1038 April 21, 2017 : U.S. public offering Member glpg:April212017U.s.PublicOfferingMember
1039 June 20, 2017 : exercise of warrants Member glpg:June202017ExerciseOfWarrantsMember
1040 September 21, 2017 : exercise of warrants Member glpg:September212017ExerciseOfWarrantsMember
1041 November 23, 2017 : exercise of warrants Member glpg:November232017ExerciseOfWarrantsMember
1042 September 17, 2018 : U.S. public offering Member glpg:September172018U.s.PublicOfferingMember
1043 October 03, 2018 : exercise of warrants Member glpg:October032018ExerciseOfWarrantsMember
1044 November 23, 2018 : exercise of warrants [member] Member glpg:November232018ExerciseOfWarrantsMember
1045 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1046 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1047 March 20, 2018 : exercise of warrants Member glpg:March202018ExerciseOfWarrantsMember
1048 June 20, 2018 : exercise of warrants Member glpg:June202018ExerciseOfWarrantsMember
1049 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1050 Balance at beginning of period, shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssuedAndFullyPaid
1051 Balance at beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
1052 Number of shares Concept (Shares) As Of glpg:AggregateNumberOfSharesAfterTransaction
1053 Capital increase expenses (fully paid) Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
1054 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
1055 Share premium Concept (Monetary) As Of Credit ifrs-full:SharePremium
1056 Share capital and share premium Concept (Monetary) As Of Credit glpg:ShareCapitalAndSharePremium
1057 Exercise of warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
1058 Average exercise price warrants Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1059 Closing share price on date of capital increase Concept (Share) For Period glpg:ClosingSharePriceOnDateOfCapitalIncrease
1060 Balance at end of period, shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssuedAndFullyPaid
1061 Balance at end of period Concept (Monetary) As Of Credit ifrs-full:Equity
1062 Underwriter discounts and offering expenses (paid) Concept (Monetary) For Period Debit glpg:IfrsPaymentsOfStockIssuanceCosts
1063 Offering expenses still to be paid Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
1064 Decrease through derecognition, financial assets Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughDerecognitionFinancialAssets
1065 Par value of shares Concept (Share) As Of ifrs-full:ParValuePerShare
1066 41805 - Disclosure - Share capital - Other information (Details) Network

*

*

 http://www.glpg.com/role/DisclosureShareCapitalOtherInformationDetails
1067 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1068 Classes of ordinary shares [axis] Axis ifrs-full:ClassesOfOrdinarySharesAxis
1069 Ordinary shares [member] Member ifrs-full:OrdinarySharesMember
1070 Ordinary Shares Member glpg:OrdinarySharesNoClassMember
1071 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1072 Authorization period Concept (xbrli:durationItemType) For Period glpg:AuthorizationTermOfBoardOfDirectors
1073 Authorized capital, approved Concept (Monetary) As Of Credit glpg:AuthorizedCapitalApprovedByShareholderS
1074 Authorized capital, used Concept (Monetary) As Of Credit glpg:AuthorizedCapitalUtilised
1075 Authorized capital, remaining available. Concept (Monetary) As Of Credit glpg:RemainingAuthorizedCapital
1076 41901 - Disclosure - Other reserves - Rollforward of other reserves (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOtherReservesRollforwardOfOtherReservesDetails
1077 Disclosure of reserves within equity [table] Table

*

*

 ifrs-full:DisclosureOfReservesWithinEquityTable
1078 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1079 Currently stated [member] Member ifrs-full:RestatedMember
1080 IFRS 9 Member glpg:IncreaseDecreaseDueToApplicationOfIfrs9Member
1081 Disclosure of reserves within equity [line items] LineItems ifrs-full:DisclosureOfReservesWithinEquityLineItems
1082 Other reserves at beginning of period Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1083 Change in accounting policy Concept (Monetary) As Of Credit glpg:IfrsCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
1084 Gain or loss (-) on defined benefit obligation recognized through OCI Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1085 Reclassification of loss on financial asset available for sale to statement of operations ( after disposal) Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
1086 Loss on financial asset available-for-sale recognized through OCI Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsNetOfTax
1087 Other reserves at end of period Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1088 41902 - Disclosure - Other reserves - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOtherReservesNarrativeDetails
1089 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
1090 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1091 Financial assets Member ifrs-full:FinancialAssetsMember
1092 Derivatives [member] Member ifrs-full:DerivativesMember
1093 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1094 Other reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1095 Reserve of remeasurement of defined benefit obligations Concept (Monetary) As Of Credit ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlans
1096 Cumulative fair value loss recognized in other comprehensive income Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
1097 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1098 Fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1099 42001 - Disclosure - Translation differences (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTranslationDifferencesDetails
1100 Implied Table Table

*

*

 implied:Table
1101 Translation differences Abstract ifrs-full:ExchangeDifferencesOnTranslationAbstract
1102 Reserve for translation differences, beginning of period Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
1103 Translation differences, arisen from translating foreign activities Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
1104 Reserve for translation differences, end of period Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
1105 42101 - Disclosure - Deferred tax - Summary of deferred tax assets and liabilities (Details) Network

*

*

 http://www.glpg.com/role/DisclosureDeferredTaxSummaryOfDeferredTaxAssetsAndLiabilitiesDetails
1106 Implied Table Table

*

*

 implied:Table
1107 Deferred tax Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
1108 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1109 Deferred tax assets unrecognized Concept (Monetary) As Of Debit glpg:DeferredTaxAssetsUnrecognized
1110 Deferred taxes in the consolidated statement of operations Concept (Monetary) For Period ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1111 Tax benefit arising from previously unrecognized tax assets used to reduce deferred tax expense (+) Concept (Monetary) For Period Credit ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
1112 Deferred tax expenses relating to change in tax rates Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
1113 Deferred tax expenses relating to use of previously recognized deferred tax assets Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
1114 42102 - Disclosure - Deferred tax - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureDeferredTaxNarrativeDetails
1115 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1116 Maturity [axis] Axis ifrs-full:MaturityAxis
1117 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1118 Expiry between 2018 and 2030 Member glpg:LaterThanOneYearAndNotLaterThanFifteenYearsMember
1119 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1120 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1121 Belgium [member] Member ifrs-full:CountryOfDomicileMember
1122 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1123 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1124 Notional Interest Deduction [Member] Member glpg:NotionalInterestDeductionMember
1125 Investment Deduction [Member] Member glpg:InvestmentDeductionMember
1126 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1127 Amounts that could give rise to deferred tax assets Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1128 Amount of unused tax losses carried forward Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1129 Amount of statutory tax losses carried forward for offset against future profits Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssetWhenUtilisationIsDependentOnFutureTaxableProfitsInExcessOfProfitsFromReversalOfTaxableTemporaryDifferencesAndEntityHasSufferedLossInJurisdictionToWhichDeferredTaxAssetRelates
1130 Supplementary carried forward tax deduction to be offset against future income Concept (Monetary) For Period Debit glpg:SupplementaryCarriedForwardTaxDeductionToBeOffsetAgainstFutureIncome
1131 Number of subsidiaries operating on cost-plus basis Concept (Integer) For Period glpg:NumberOfSubsidiariesOperatingOnCostPlusBasisForWhichDeferredTaxAssetsWereRecognized
1132 42201 - Disclosure - Trade and other liabilities (Details) Network

*

*

 http://www.glpg.com/role/DisclosureTradeAndOtherLiabilitiesDetails
1133 Implied Table Table

*

*

 implied:Table
1134 Trade and other liabilities Abstract ifrs-full:TradeAndOtherPayablesAbstract
1135 Trade and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayables
1136 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
1137 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
1138 Accrued charges Concept (Monetary) As Of Credit ifrs-full:AccrualsClassifiedAsCurrent
1139 Total trade and other liabilities Concept (Monetary) As Of Credit glpg:TotalTradeAndOtherLiabilities
1140 42301 - Disclosure - Deferred income (Details) Network

*

*

 http://www.glpg.com/role/DisclosureDeferredIncomeDetails
1141 Disclosure of Deferred Income [Table] Table

*

*

 glpg:DisclosureOfDeferredIncomeTable
1142 Segments [axis] Axis ifrs-full:SegmentsAxis
1143 Segments [member] Member ifrs-full:SegmentsMember
1144 Fee For Services Segment [Member] Member glpg:FeeForServicesSegmentMember
1145 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1146 Counterparties [member] Member ifrs-full:CounterpartiesMember
1147 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
1148 AbbVie Member glpg:AbbvieMember
1149 Servier Member glpg:ServierMember
1150 ifrs Type Of Arrangement [Axis] Axis glpg:IfrsTypeOfArrangementAxis
1151 ifrs type of arrangement [domain] Member glpg:IfrsTypeOfArrangementDomain
1152 Collaborative Arrangement [Member] Member glpg:IfrsCollaborativeArrangementMember
1153 License [member] Member ifrs-full:LicencesMember
1154 Grants [member] Member glpg:GrantsMember
1155 Collaboration Agreement For Filgotinib [Member] Member glpg:CollaborationAgreementForFilgotinibMember
1156 Gilead Share Subscription Agreement [Member] Member glpg:GileadShareSubscriptionAgreementMember
1157 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1158 Currently stated [member] Member ifrs-full:RestatedMember
1159 IFRS 15 Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
1160 Disclosure of Deferred Income [Line Items] LineItems glpg:DisclosureOfDeferredIncomeLineItems
1161 Other deferred income Concept (Monetary) As Of Credit glpg:OtherDeferredIncome
1162 Deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
1163 Decrease in deferred income Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
1164 Increase in contract liability Concept (Monetary) For Period Credit glpg:IncreaseDecreaseInContractLiabilities
1165 Current deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
1166 Non-current deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
1167 License fee payment Concept (Monetary) For Period Debit glpg:LicenseFeePayment
1168 42401 - Disclosure - Operating Cash Flow (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingCashFlowDetails
1169 Implied Table Table

*

*

 implied:Table
1170 Consolidated Cash Flows Statement Abstract ifrs-full:StatementOfCashFlowsAbstract
1171 Adjustments for: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
1172 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
1173 Impairment loss Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
1174 Share-based compensation expenses Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
1175 Increase in retirement benefit obligations and provisions Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
1176 Unrealised exchange gains /losses and non-cash other financial expenses Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
1177 Fair value adjustment financial assets held at fair value through profit or loss Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForFairValueGainsLosses
1178 Fair value re-measurement of share subscription agreement Concept (Monetary) For Period Debit glpg:AdjustmentsForFairValueRemeasurementOfShareSubscriptionAgreement
1179 Total adjustment for non-cash transactions Concept (Monetary) For Period Debit glpg:AdjustmentForNonCashTransactions
1180 Interest expense Concept (Monetary) For Period Credit ifrs-full:FinanceCostsPaidClassifiedAsOperatingActivities
1181 Interest income Concept (Monetary) For Period Debit ifrs-full:FinanceIncomeReceivedClassifiedAsOperatingActivities
1182 Tax expense Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
1183 Total adjustment for items to disclose separately under operating cash flow Concept (Monetary) For Period Debit glpg:AdjustmentForItemsToDiscloseSeparatelyUnderOperatingCashFlow
1184 Gain on sale of financial assets held at fair value through profit or loss Concept (Monetary) For Period Credit glpg:AdjustmentsForGainLossOnDisposalsFinancialAssetsHeldAtFairValueThroughProfitOfLoss
1185 Gain on sale of fixed assets Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
1186 Total adjustment for items to disclose separately under investing and financing cash flow Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow
1187 Decrease in inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
1188 Increase in receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
1189 Increase in payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
1190 Total change in working capital other than deferred income Concept (Monetary) For Period Credit glpg:IncreaseDecreaseInWorkingCapitalExcludingDeferredIncome
1191 42501 - Disclosure - Operating lease obligations (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOperatingLeaseObligationsDetails
1192 Implied Table Table

*

*

 implied:Table
1193 Operating lease obligations Abstract ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
1194 Total minimum lease payments under operating leases Concept (Monetary) For Period Debit ifrs-full:MinimumOperatingLeasePayments
1195 42601 - Disclosure - Off-balance sheet arrangements (Details) Network

*

*

 http://www.glpg.com/role/DisclosureOffBalanceSheetArrangementsDetails
1196 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1197 ifrs Type Of Arrangement [Axis] Axis glpg:IfrsTypeOfArrangementAxis
1198 ifrs type of arrangement [domain] Member glpg:IfrsTypeOfArrangementDomain
1199 Collaboration Agreement For Filgotinib [Member] Member glpg:CollaborationAgreementForFilgotinibMember
1200 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1201 Counterparties [member] Member ifrs-full:CounterpartiesMember
1202 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
1203 Maturity [axis] Axis ifrs-full:MaturityAxis
1204 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1205 Less than1 year Member ifrs-full:NotLaterThanOneYearMember
1206 1-3 years Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
1207 3-5 years Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
1208 More than 5 years Member ifrs-full:LaterThanFiveYearsMember
1209 Off-balance sheet arrangements LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1210 Operating lease obligations Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1211 Purchase commitments Concept (Monetary) As Of Credit glpg:PurchaseCommitments
1212 Total contractual obligations and commitments Concept (Monetary) As Of Credit glpg:ContractualObligationsCommitments
1213 42701 - Disclosure - Contingent assets and liabilities (Details) Network

*

*

 http://www.glpg.com/role/DisclosureContingentAssetsAndLiabilitiesDetails
1214 Statement [Table] Table

*

*

 us-gaap:StatementTable
1215 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1216 Counterparties [member] Member ifrs-full:CounterpartiesMember
1217 Gilead Sciences, Inc Member glpg:GileadSciencesIncMember
1218 Research and Development Program [Axis] Axis glpg:ResearchAndDevelopmentProgramAxis
1219 Research and Development [Domain] Member glpg:ResearchAndDevelopmentDomain
1220 Filgotinib Program [Member] Member glpg:FilgotinibProgramMember
1221 Statement [Line Items] LineItems us-gaap:StatementLineItems
1222 Total consideration Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
1223 Consideration received in cash Concept (Monetary) For Period Credit ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents
1224 Potential earn out due upon achievement of a revenue target Concept (Monetary) For Period Credit glpg:PotentialEarnOutDueUponAchievementOfRevenueTarget
1225 Number of months to achieve revenue target Concept (xbrli:durationItemType) For Period glpg:NumberOfMonthsToAchieveTarget
1226 Percentage of consideration held in escrow Concept (Percent) For Period glpg:PercentageOfConsiderationHeldInEscrow
1227 Number of claims Concept (Integer) As Of glpg:NumberOfClaims
1228 Total settlement amount of claims Concept (Monetary) As Of Credit glpg:TotalSettlementAmountOfClaims
1229 Amount released from escrow Concept (Monetary) For Period Debit glpg:AmountReleasedFromEscrow
1230 Period a claim covered by tax deed can be introduced Concept (xbrli:durationItemType) For Period glpg:MaximumNumberOfYearsClaimsCanBeSubmitted
1231 Damages claimed Concept (Monetary) For Period Debit glpg:IfrsLossContingencyDamagesSoughtValue
1232 Funding in global development cost (as percentage) Concept (Percent) For Period glpg:PercentageOfFundingInGlobalDevelopmentCost
1233 42801 - Disclosure - Retirement benefit plans - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansNarrativeDetails
1234 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1235 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1236 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1237 Retirement benefits including death benefits [member] Member glpg:RetirementBenefitsIncludingDeathBenefitsMember
1238 Other post-employment benefits [member] Member glpg:OtherPostEmploymentBenefitsMember
1239 Geographical [Axis] Axis srt:StatementGeographicalAxis
1240 Geographical [Domain] Member srt:SegmentGeographicalDomain
1241 France Member country:FR
1242 Belgium Member country:BE
1243 Range [axis] Axis ifrs-full:RangeAxis
1244 Ranges [member] Member ifrs-full:RangesMember
1245 Minimum Member ifrs-full:BottomOfRangeMember
1246 Maximum Member ifrs-full:TopOfRangeMember
1247 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1248 Guaranteed rate of return on employer contributions Concept (Percent) For Period glpg:GuaranteedRateOfReturnOnEmployerContributions
1249 Guaranteed rate of return on employee contributions Concept (Percent) For Period glpg:GuaranteedRateOfReturnOnEmployeeContributions
1250 Provisions for seniority premiums Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1251 Total obligation included in the balance sheet Concept (Monetary) As Of Credit ifrs-full:DefinedBenefitObligationAtPresentValue
1252 Actuarial gains (losses) recognized in OCI Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1253 Amounts due by employer to pension plans Concept (Monetary) For Period Credit glpg:DefinedBenefitPlansAmountDueToPensionPlans
1254 Amounts paid by employer after year end Concept (Monetary) For Period Debit glpg:DefinedBenefitPlanAmountPaidToPensionPlans
1255 Employee contributions Concept (Monetary) For Period Credit ifrs-full:EmployeeContributions
1256 Plan assets Concept (Monetary) As Of Debit ifrs-full:AssetsOfBenefitPlan
1257 Weighted average guaranteed interest rate Concept (Percent) As Of glpg:WeightedAverageGuaranteedInterestRate
1258 42802 - Disclosure - Retirement benefit plans - Obligations included in the balance sheet (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansObligationsIncludedInBalanceSheetDetails
1259 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1260 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1261 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1262 Present value of defined benefit obligation [member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1263 Funded defined benefit obligation [member] Member glpg:PresentValueOfFundedDefinedBenefitObligationMember
1264 Unfunded defined benefit obligation [member] Member glpg:PresentValueOfUnfundedDefinedBenefitObligationMember
1265 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1266 Present value of defined benefit obligation Concept (Monetary) As Of Credit ifrs-full:DefinedBenefitObligationAtPresentValue
1267 Plan assets Concept (Monetary) As Of Debit ifrs-full:PlanAssetsAtFairValue
1268 Deficit/surplus Concept (Monetary) As Of Debit ifrs-full:SurplusDeficitInPlan
1269 Liability included in the balance sheet Concept (Monetary) As Of Credit glpg:LiabilityAssetOfDefinedBenefitPlansIncludedInBalanceSheet
1270 42803 - Disclosure - Retirement benefit plans - Present value of the gross obligation (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansPresentValueOfGrossObligationDetails
1271 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1272 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1273 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1274 Present value of defined benefit obligation [member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1275 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1276 Opening balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1277 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1278 Actual taxes on contributions paid Concept (Monetary) For Period Credit glpg:DefinedBenefitPlansTaxesPaidOnContributions
1279 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1280 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1281 Actuarial gains (-) or losses due to experience adjustments Concept (Monetary) For Period Debit glpg:ActuarialGainsLossesArisingFromExperienceAdjustments
1282 Actuarial gains (-) or losses due to experience adjustments related to new financial assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1283 Actuarial gains (-) or losses due to experience adjustments related to new demographic assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
1284 Closing balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1285 42804 - Disclosure - Retirement benefit plans - Fair value of plan assets (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansFairValueOfPlanAssetsDetails
1286 Disclosure of fair value of plan assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueOfPlanAssetsTable
1287 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1288 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1289 Plan assets [member] Member ifrs-full:PlanAssetsMember
1290 Disclosure of fair value of plan assets [line items] LineItems ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
1291 Opening balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1292 Interest income on plan assets Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1293 Actual administration costs Concept (Monetary) For Period Credit glpg:AdministrativeExpenseEffectOnPlanAssets
1294 Contributions from employer Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1295 Actual taxes on contributions paid Concept (Monetary) For Period Credit glpg:DefinedBenefitPlansTaxesPaidOnContributions
1296 Plan assets gain during the period Concept (Monetary) For Period Debit ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
1297 Closing balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1298 42805 - Disclosure - Retirement benefit plans - Amounts recognized in profit or loss (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansAmountsRecognizedInProfitOrLossDetails
1299 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1300 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1301 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1302 Present value of defined benefit obligation [member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1303 Plan assets [member] Member ifrs-full:PlanAssetsMember
1304 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1305 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1306 Interest cost (income) Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1307 Actual administration costs Concept (Monetary) For Period Credit glpg:AdministrativeExpenseEffectOnNetBenefitLiabilityAsset
1308 Revaluations of net liability / net asset Concept (Monetary) For Period Credit glpg:DefinedBenefitPlansRevaluationOfNetLiabilityAsset
1309 Total expense Concept (Monetary) For Period Credit glpg:DefinedBenefitPlanExpenseRecognizedInIncomeStatement
1310 42806 - Disclosure - Retirement benefit plans - Obligation included in the balance sheet (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansObligationIncludedInBalanceSheetDetails
1311 Implied Table Table

*

*

 implied:Table
1312 Retirement benefit plans Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
1313 Opening balance Concept (Monetary) As Of Credit glpg:LiabilityAssetOfDefinedBenefitPlansIncludedInBalanceSheet
1314 Contributions from employer Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1315 Total expense recognized in the income statement Concept (Monetary) For Period Credit glpg:DefinedBenefitPlanExpenseRecognizedInIncomeStatement
1316 Re-measurement on the net defined benefit liability Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
1317 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1318 Closing balance Concept (Monetary) As Of Credit glpg:LiabilityAssetOfDefinedBenefitPlansIncludedInBalanceSheet
1319 42807 - Disclosure - Retirement benefit plans - Main actuarial assumptions (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansMainActuarialAssumptionsDetails
1320 Implied Table Table

*

*

 implied:Table
1321 Retirement benefit plans Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
1322 Weighted average discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
1323 Expected salary increase Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
1324 Inflation rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
1325 42808 - Disclosure - Retirement benefit plans - Breakdown of defined benefit obligation (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansBreakdownOfDefinedBenefitObligationDetails
1326 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1327 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1328 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1329 Retirement and death benefits [member] Member glpg:RetirementAndDeathBenefitsMember
1330 Other post-employment benefits [member] Member glpg:OtherPostEmploymentBenefitsMember
1331 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1332 Active plan participants Concept (xbrli:positiveIntegerItemType) For Period glpg:DefinedBenefitPlansNumberOfParticipants
1333 Defined benefit obligation Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1334 42809 - Disclosure - Retirement benefit plans - Major category of plan assets (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansMajorCategoryOfPlanAssetsDetails
1335 Implied Table Table

*

*

 implied:Table
1336 Retirement benefit plans Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
1337 Equity Concept (Monetary) As Of Debit ifrs-full:EquityInstrumentsAmountContributedToFairValueOfPlanAssets
1338 Debt Concept (Monetary) As Of Debit ifrs-full:DebtInstrumentsAmountContributedToFairValueOfPlanAssets
1339 Cash Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets
1340 42810 - Disclosure - Retirement benefit plans - Sensitivity analysis on discount rate (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRetirementBenefitPlansSensitivityAnalysisOnDiscountRateDetails
1341 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1342 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
1343 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
1344 Actuarial assumption of discount rates [member] Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1345 Discount rate one [member] Member glpg:AssumptionOneOfDiscountRateMember
1346 Discount rate two [member] Member glpg:AssumptionTwoOfDiscountRateMember
1347 Discount rate three [member] Member glpg:AssumptionThreeOfDiscountRateMember
1348 Discount rate four [member] Member glpg:AssumptionFourOfDiscountRateMember
1349 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1350 Effect on gross obligation, decreased discount rate Concept (Percent) For Period glpg:EffectOnGrossObligationDecreasedDiscountRate
1351 Effect on gross obligation, increased discount rate Concept (Percent) For Period glpg:EffectOnGrossObligationIncreasedDiscountRate
1352 Weighted average discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
1353 Liability included in the balance sheet Concept (Monetary) As Of Credit glpg:LiabilityAssetOfDefinedBenefitPlansIncludedInBalanceSheet
1354 Effect on gross obligation due to change in discount rate Concept (Monetary) As Of Credit glpg:EffectOnGrossObligationDueToChangeInDiscountRate
1355 42901 - Disclosure - Warrant plans (Details) Network

*

*

 http://www.glpg.com/role/DisclosureWarrantPlansDetails
1356 Warrant Plans Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1357 Ifrs Vesting [Axis] Axis glpg:IfrsVestingAxis
1358 Ifrs Vesting [Domain] Member glpg:IfrsVestingDomain
1359 Warrants vested on date of grant Member glpg:IfrsShareBasedCompensationAwardTrancheOneMember
1360 Warrants vested on first anniversary Member glpg:IfrsShareBasedCompensationAwardTrancheTwoMember
1361 Warrants vested on second anniversary Member glpg:IfrsShareBasedCompensationAwardTrancheThreeMember
1362 Warrants vested on third anniversary Member glpg:ShareBasedCompensationAwardTrancheFourMember
1363 Warrants vested on end of third calendar year Member glpg:ShareBasedCompensationAwardTrancheFiveMember
1364 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1365 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1366 2005 allocated on July 2005 Member glpg:WarrantsPlan2005AllocatedOnJuly2005Member
1367 2005 allocated on December 2005 Member glpg:WarrantsPlan2005AllocatedOnDecember2005Member
1368 2006 BNL allocated on June 2007 Member glpg:WarrantsPlan2006BnlAllocatedOnJune2007Member
1369 2006 BNL allocated on December 2007 Member glpg:WarrantsPlan2006BnlAllocatedOnDecember2007Member
1370 2007 allocated on June 2007 Member glpg:WarrantsPlan2007AllocatedOnJune2007Member
1371 2007 RMV allocated on October 2007 Member glpg:WarrantsPlan2007RmvAllocatedOnOctober2007Member
1372 2008 allocated on June 2008 Member glpg:WarrantsPlan2008AllocatedOnJune2008Member
1373 2010 allocated on April 2010 Member glpg:WarrantsPlan2010AllocatedOnApril2010Member
1374 2011 allocated on May 2011 Member glpg:WarrantsPlan2011AllocatedOnMay2011Member
1375 2012 allocated on September 2012 Member glpg:WarrantsPlan2012AllocatedOnSeptember2012Member
1376 2013 allocated on May 2013 Member glpg:WarrantsPlan2013AllocatedOnMay2013Member
1377 2014 allocated on July 2014 Member glpg:WarrantsPlan2014AllocatedOnJuly2014Member
1378 2014 (B) allocated on October 2014 Member glpg:WarrantsPlan2014BAllocatedOnOctober2014Member
1379 2015 allocated on April 2015 Member glpg:WarrantsPlan2015AllocatedOnApril2015Member
1380 2015 (B) allocated on December 2015 Member glpg:WarrantsPlan2015BAllocatedOnDecember2015Member
1381 2015 RMV allocated on December 2015 Member glpg:WarrantsPlan2015RmvAllocatedOnDecember2015Member
1382 2016 allocated on June 2016 Member glpg:WarrantsPlan2016AllocatedOnJune2016Member
1383 2016 RMV allocated on June 2016 Member glpg:WarrantsPlan2016RmvAllocatedOnJune2016Member
1384 2016 (B) allocated on January 2017 Member glpg:WarrantsPlan2016BAllocatedOnJanuary2017Member
1385 2017 allocated on May 2017 Member glpg:WarrantsPlan2017AllocatedOnMay2017Member
1386 2017 RMV allocated on May 2017 Member glpg:WarrantsPlan2017RmvAllocatedOnMay2017Member
1387 2018 allocated on April 2018 Member glpg:WarrantsPlan2018AllocatedOnApril2018Member
1388 2018 RMV allocated on April 2018 Member glpg:WarrantsPlan2018RmvAllocatedOnApril2018Member
1389 Warrant Plans LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1390 Percentage of warrants vested for directors Concept (Percent) For Period glpg:PercentageOfWarrantsVested
1391 Vesting period for directors Concept (xbrli:durationItemType) For Period glpg:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod
1392 Exercise Price Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1393 Outstanding at the beginning of the year Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1394 Granted during year Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1395 Exercised during year Concept (Decimal) For Period glpg:NumberOfOtherEquityInstrumentsExercisedInShareBasedPaymentArrangement
1396 Forfeited during year Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1397 Expired during year Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
1398 Outstanding at the end of the year Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1399 Exercisable Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1400 42902 - Disclosure - Warrant plans - Rollforward (Details) Network

*

*

 http://www.glpg.com/role/DisclosureWarrantPlansRollforwardDetails
1401 Implied Table Table

*

*

 implied:Table
1402 Warrant plans Abstract glpg:WarrantPlansAbstract
1403 Outstanding at the beginning of the year Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1404 Granted during year Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1405 Forfeited during year Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1406 Exercised during year Concept (Decimal) For Period glpg:NumberOfOtherEquityInstrumentsExercisedInShareBasedPaymentArrangement
1407 Expired during year Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
1408 Outstanding at the end of the year Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1409 Exercisable Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1410 Weighted average exercise price of other equity instruments outstanding in share-based payment arrangement at beginning of period Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1411 42903 - Disclosure - Warrant plans - Valuation (Details) Network

*

*

 http://www.glpg.com/role/DisclosureWarrantPlansValuationDetails
1412 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1413 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1414 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1415 2018 allocated on April 2018 Member glpg:WarrantsPlan2018AllocatedOnApril2018Member
1416 2018 RMV allocated on April 2018 Member glpg:WarrantsPlan2018RmvAllocatedOnApril2018Member
1417 2017 allocated on May 2017 Member glpg:WarrantsPlan2017AllocatedOnMay2017Member
1418 2017 RMV allocated on May 2017 Member glpg:WarrantsPlan2017RmvAllocatedOnMay2017Member
1419 2016 (B) allocated on January 2016 Member glpg:WarrantsPlan2016BAllocatedOnJanuary2016Member
1420 2016 allocated on June 2016 Member glpg:WarrantsPlan2016AllocatedOnJune2016Member
1421 2016 RMV allocated on June 2016 Member glpg:WarrantsPlan2016RmvAllocatedOnJune2016Member
1422 Warrant Plans LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1423 Exercise Price Concept (Share) For Period glpg:ExercisePriceOtherEquityInstrumentsGranted
1424 Share price at acceptance date Concept (Share) For Period glpg:SharePriceOtherEquityInstrumentsGranted
1425 Fair value on the acceptance date Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
1426 Estimated volatility (%) Concept (Percent) For Period glpg:ExpectedVolatilityOtherEquityInstrumentsGranted
1427 Time to expiration (years) Concept (xbrli:durationItemType) For Period glpg:OptionLifeOtherEquityInstrumentsGranted
1428 Risk free rate (%) Concept (Percent) For Period glpg:RiskFreeInterestRateOtherEquityInstrumentsGranted
1429 Warrants expense Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
1430 42904 - Disclosure - Warrant plans - Category (Details) Network

*

*

 http://www.glpg.com/role/DisclosureWarrantPlansCategoryDetails
1431 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1432 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1433 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1434 Key management personnel of entity or parent [member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1435 Non-executive directors Member glpg:NonExecutiveDirectorsMember
1436 Executive team Member glpg:ExecutiveTeamMember
1437 Other Member glpg:OtherMember
1438 Warrant Plans LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1439 Total warrants outstanding Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1440 Exercise Price Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1441 Weighted average remaining expected life Concept (xbrli:durationItemType) For Period glpg:WeightedAverageRemainingContractualLifeOutstandingOfOtherEquityInstruments
1442 43001 - Disclosure - Related parties - Narrative (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRelatedPartiesNarrativeDetails
1443 Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [table] Table

*

*

 ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesTable
1444 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1445 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1446 Key management personnel of entity or parent [member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1447 Executive committee members as a group Member glpg:ExecutiveCommitteeMembersAsGroupMember
1448 Raj Parekh Member glpg:RajParekhMember
1449 Harrold van Barlingen Member glpg:HarroldVanBarlingenMember
1450 Howard Rowe Member glpg:HowardRoweMember
1451 Werner Cautreels Member glpg:WernerCautreelsMember
1452 Katrine Bosley Member glpg:KatrineBosleyMember
1453 Christine Mummery Member glpg:ChristineMummeryMember
1454 Mary Kerr Member glpg:MaryKerrMember
1455 Bosley, Rowe, and Van Barlingen Member glpg:BosleyRoweAndVanBarlingenMember
1456 Mummery and Kerr Member glpg:MummeryAndKerrMember
1457 Independent directors Member glpg:IndependentDirectorsMember
1458 Dr. Harrold van Barlingen Member glpg:Dr.HarroldVanBarlingenMember
1459 Other non-executive directors Member glpg:OtherNonExecutiveDirectorsMember
1460 Classification of Bonus [Axis] Axis glpg:ClassificationOfBonusAxis
1461 Classification of Bonus [Domain] Member glpg:ClassificationOfBonusDomain
1462 Paid immediately [member] Member glpg:PaidImmediatelyMember
1463 Deferred [member] Member glpg:DeferredMember
1464 Exceptional deferred [member] Member glpg:ExceptionalDeferredMember
1465 Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [line items] LineItems ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesLineItems
1466 Number of executive committee members Concept (Integer) For Period glpg:NumberOfExecutiveCommitteeMembers
1467 Number of board of directors Concept (Integer) For Period glpg:NumberOfBoardOfDirectors
1468 Remuneration amount Concept (Monetary) For Period Debit glpg:RemunerationAmount
1469 Bonus amount Concept (Monetary) For Period Debit glpg:BonusAmount
1470 Percentage of bonus Concept (Percent) For Period glpg:PercentageOfBonus
1471 Bonus deferment period Concept (xbrli:durationItemType) For Period glpg:BonusDefermentPeriod
1472 Fee amount, net of consultancy fee Concept (Monetary) For Period Debit glpg:FeeAmountNetOfConsultancyFee
1473 Consultancy fee Concept (Monetary) For Period Debit glpg:ConsultancyFee
1474 Aggregate fee amount Concept (Monetary) For Period Debit glpg:AggregateFeeAmount
1475 Fee amount as chairman of the board Concept (Monetary) For Period Debit glpg:FeeAmountAsChairmanOfBoard
1476 Fee amount as chairman of the nomination and remuneration committee Concept (Monetary) For Period Debit glpg:FeeAmountAsChairmanOfNominationAndRemunerationCommittee
1477 Fee amount as non-executive director Concept (Monetary) For Period Debit glpg:FeeAmountAsNonExecutiveDirector
1478 Fee amount as chairman of the audit committee Concept (Monetary) For Period Debit glpg:FeeAmountAsChairmanOfAuditCommittee
1479 Fee amount as member of the nomination and remuneration committee Concept (Monetary) For Period Debit glpg:FeeAmountAsMemberOfNominationAndRemunerationCommittee
1480 Fee amount as member of the nomination and remuneration committee or audit committee Concept (Monetary) For Period Debit glpg:FeeAmountAsMemberOfNominationAndRemunerationCommitteeOrAuditCommittee
1481 Fee amount as member of audit committee Concept (Monetary) For Period Debit glpg:FeeAmountAsMemberOfAuditCommittee
1482 Other short-term benefits Concept (Monetary) For Period Debit glpg:KeyManagementPersonnelCompensationOtherShortTermEmployeeBenefits
1483 Warrants offered Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1484 43002 - Disclosure - Related parties - Summary of remuneration package (Details) Network

*

*

 http://www.glpg.com/role/DisclosureRelatedPartiesSummaryOfRemunerationPackageDetails
1485 Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [table] Table

*

*

 ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesTable
1486 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1487 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1488 Key management personnel of entity or parent [member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1489 Executive committee members as a group Member glpg:ExecutiveCommitteeMembersAsGroupMember
1490 Raj Parekh Member glpg:RajParekhMember
1491 Werner Cautreels Member glpg:WernerCautreelsMember
1492 Harrold van Barlingen Member glpg:HarroldVanBarlingenMember
1493 Howard Rowe Member glpg:HowardRoweMember
1494 Katrine Bosley Member glpg:KatrineBosleyMember
1495 Christine Mummery Member glpg:ChristineMummeryMember
1496 Mary Kerr Member glpg:MaryKerrMember
1497 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1498 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1499 Warrants Member glpg:WarrantsMember
1500 Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [line items] LineItems ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesLineItems
1501 Short-term benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1502 Post-employment benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
1503 Total benefits excluding warrants Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1504 Warrants offered Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1505 Total cost of warrants granted in the year Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1506 43101 - Disclosure - Consolidated companies as of December 31, 2018 (Details) Network

*

*

 http://www.glpg.com/role/DisclosureConsolidatedCompaniesAsOfDecember312018Details
1507 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1508 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1509 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1510 Switzerland Member country:CH
1511 United States Member country:US
1512 Germany Member country:DE
1513 Croatia Member country:HR
1514 The Netherlands Member country:NL
1515 United Kingdom Member country:GB
1516 Belgium Member country:BE
1517 France Member country:FR
1518 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1519 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1520 BioFocus DPI AG Member glpg:BiofocusDpiAgMember
1521 Discovery Partners International GmbH Member glpg:DiscoveryPartnersInternationalGmbhMember
1522 Fidelta d.o.o. Member glpg:FideltaD.o.o.Member
1523 Galapagos B.V Member glpg:GalapagosB.vMember
1524 Galapagos Biotech Ltd. (formerly Inpharmatica Ltd.) Member glpg:GalapagosBiotechLtd.Member
1525 Galapagos GmbH Member glpg:GalapagosGmbhMember
1526 Galapagos Real Estate 1 BVBA Member glpg:GalapagosRealEstate1BvbaMember
1527 Galapagos Real Estate 2 BVBA Member glpg:GalapagosRealEstate2BvbaMember
1528 Galapagos SASU (France) Member glpg:GalapagosSasuMember
1529 Galapagos, Inc. (formerly Biofocus, Inc.) Member glpg:GalapagosInc.Member
1530 Xenometrix, Inc. Member glpg:XenometrixInc.Member
1531 Consolidated companies as of December 31, 2016 LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1532 Percentage of voting rights held directly or indirectly through subsidiaries Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
1533 Changes in voting rights Concept (Percent) For Period glpg:ChangeInOwnershipInterest
1534 43201 - Disclosure - Financial risk management - Financial risk factors (Details) Network

*

*

 http://www.glpg.com/role/DisclosureFinancialRiskManagementFinancialRiskFactorsDetails
1535 Disclosure of detailed information about financial instruments [table] Table

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*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1536 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1537 Financial assets Member ifrs-full:FinancialAssetsMember
1538 Cash and cash equivalents Member glpg:CashAndCashEquivalentMember
1539 Restricted cash (current and non-current) Member glpg:RestrictedCashMember
1540 Trade and other receivables Member glpg:TradeAndOtherReceivablesMember
1541 R&D incentives receivables (current and non-current) Member glpg:ResearchAndDevelopmentIncentivesReceivablesMember
1542 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1543 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1544 Trade & other liabilities Member glpg:TradeAndOtherPayablesMember
1545 Other non-current liabilities Member glpg:OtherLiabilitiesNonCurrentMember
1546 Financial lease liabilities Member glpg:FinancialLeaseLiabilitiesMember
1547 Tax payable Member glpg:TaxPayableMember
1548 Financial risk management LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1549 Equity instruments Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
1550 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1551 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1552 43202 - Disclosure - Financial risk management - Aging of Debtors (Details) Network

*

*

 http://www.glpg.com/role/DisclosureFinancialRiskManagementAgingOfDebtorsDetails
1553 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1554 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1555 Risks [member] Member ifrs-full:TypesOfRisksMember
1556 Credit risk Member ifrs-full:CreditRiskMember
1557 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1558 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1559 Trade receivables Member ifrs-full:TradeReceivablesMember
1560 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1561 Past due status [member] Member ifrs-full:PastDueStatusMember
1562 60 - 90 days Member ifrs-full:LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember
1563 90 - 120 days Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanFourMonthsMember
1564 more than 120 days Member ifrs-full:LaterThanFourMonthsMember
1565 Financial risk management LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1566 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1567 43203 - Disclosure - Financial risk management - Interest rate risk and foreign exchange risk (Details) Network

*

*

 http://www.glpg.com/role/DisclosureFinancialRiskManagementInterestRateRiskAndForeignExchangeRiskDetails
1568 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1569 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1570 Risks [member] Member ifrs-full:TypesOfRisksMember
1571 Interest rate risk Member ifrs-full:InterestRateRiskMember
1572 Foreign exchange risk Member ifrs-full:CurrencyRiskMember
1573 Currency [Axis] Axis srt:CurrencyAxis
1574 All Currencies [Domain] Member currency:AllCurrenciesDomain
1575 Euros - U.S. Dollars Exchange rate value Member glpg:EuroUsdExchangeRateValueMember
1576 Euros - GB Pounds Exchange rate value Member glpg:EuroGbpExchangeRateValueMember
1577 Euros - CH Francs Exchange rate value Member glpg:EuroChFrancsExchangeRateValueMember
1578 Euros - HR Kunas Exchange rate value Member glpg:EuroHrKunasExchangeRateValueMember
1579 U.S. Dollars - GB Pounds Exchange rate value Member glpg:UsdGbpExchangeRateValueMember
1580 Financial risk management LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1581 Increase in interest rates Concept (Percent) As Of glpg:PercentageOfReasonablyPossibleIncreaseInRiskAssumption
1582 Decrease in interest rates Concept (Percent) As Of glpg:PercentageOfReasonablyPossibleDecreaseInRiskAssumption
1583 Increase in profit and loss on account of increase in interest rates Concept (Monetary) As Of glpg:IncreaseDecreaseInProfitAndLossDueToReasonablyPossibleIncreaseInDesignatedRiskComponent
1584 Decrease in profit and loss on account of decrease in interest rates Concept (Monetary) As Of glpg:IncreaseDecreaseInProfitAndLossDueToReasonablyPossibleDecreaseInDesignatedRiskComponent
1585 Percentage of change in risk assumption Concept (Percent) As Of glpg:PercentageOfReasonablyPossibleChangeInRiskAssumption
1586 Increase (Decrease) in net book value Concept (Monetary) For Period Debit glpg:IncreaseDecreaseInNetBookValueDueToReasonablyPossibleChangeInDesignatedRiskComponent
1587 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
1588 43301 - Disclosure - Auditor's remuneration (Details) Network

*

*

 http://www.glpg.com/role/DisclosureAuditorSRemunerationDetails
1589 Implied Table Table

*

*

 implied:Table
1590 Auditor's remuneration Abstract ifrs-full:AuditorsRemunerationAbstract
1591 Statutory auditor's fees Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForAuditServices
1592 Fees for other assurance engagements Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForOtherServices
1593 Fees for legal assignments Concept (Monetary) For Period Debit glpg:AuditorSRemunerationForLegalAssignments
1594 Fees for persons related to the statutory auditor Concept (Monetary) For Period Debit glpg:FeesForPersonsRelatedToStatutoryAuditor
1595 Other fees related to non-audit fees Concept (Monetary) For Period Debit glpg:OtherFeesRelatedToNonAuditFees
1596 43401 - Disclosure - Events after balance sheet date (Details) Network

*

*

 http://www.glpg.com/role/DisclosureEventsAfterBalanceSheetDateDetails
1597 Disclosure of non-adjusting events after reporting period [table] Table

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*

 ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
1598 ifrs Title Of Individual [Axis] Axis glpg:IfrsTitleOfIndividualAxis
1599 ifrs Title Of Individual With Relationship To Entity [Domain] Member glpg:IfrsTitleOfIndividualWithRelationshipToEntityDomain
1600 CEO [member] Member glpg:CeoMember
1601 Members of Executive Committee [member] Member glpg:MembersOfExecutiveCommitteeMember
1602 Members of Board of Directors [member] Member glpg:MembersOfBoardOfDirectorsMember
1603 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1604 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1605 Exercise of Warrants [Member] Member glpg:ExerciseOfWarrantsMember
1606 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
1607 Warrants exercised Concept (Decimal) For Period glpg:NumberOfOtherEquityInstrumentsExercisedInShareBasedPaymentArrangement
1608 Average exercise price warrants Concept (Share) For Period glpg:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedInShareBasedPaymentArrangement
1609 Increase to share capital and issuance premium due to warrants issued Concept (Monetary) As Of Credit glpg:IncreaseInShareCapitalAndIssuancePremiumDueToIssuanceOfWarrants
1610 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1611 Closing share price Concept (Share) As Of glpg:IfrsSharePrice

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*