ARGENX SE (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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3 Document and Entity Information [Abstract] Abstract argx: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 Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
16 Entity Shell Company Concept (Yes/No) For Period dei:EntityShellCompany
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 argx:IfrsStatementOfFinancialPositionAbstract
22 ASSETS Abstract ifrs-full:AssetsAbstract
23 Current assets Abstract ifrs-full:CurrentAssetsAbstract
24 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
25 Restricted cash — current Concept (Monetary) As Of Debit ifrs-full:CurrentRestrictedCashAndCashEquivalents
26 Research and development incentive receivables — current Concept (Monetary) As Of Debit argx:ResearchAndDevelopmentIncentiveReceivablesCurrent
27 Financial assets — current Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
28 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
29 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
30 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
31 Noncurrent assets Abstract ifrs-full:NoncurrentAssetsAbstract
32 Restricted cash — non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
33 Research and development incentive receivables — non-current Concept (Monetary) As Of Debit argx:ResearchAndDevelopmentIncentiveReceivablesNonCurrent
34 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
35 Financial assets — non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
36 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
37 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
38 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
39 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
40 EQUITY AND LIABILITIES Abstract ifrs-full:EquityAndLiabilitiesAbstract
41 Equity Abstract ifrs-full:EquityAbstract
42 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
43 Share premium Concept (Monetary) As Of Credit ifrs-full:SharePremium
44 Accumulated losses Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
45 Other reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
46 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
47 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
48 Provisions for employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
49 Deferred revenue — non-current Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
50 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
51 Trade and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
52 Tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
53 Deferred revenue - current Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
54 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
55 TOTAL EQUITY AND LIABILITIES Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
56 00200 - Statement - CONSOLIDATED STATEMENT OF PROFIT AND LOSS AND OTHER COMPREHENSIVE INCOME Network

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57 Implied Table Table

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58 CONSOLIDATED STATEMENT OF PROFIT AND LOSS AND OTHER COMPREHENSIVE INCOME Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
59 Revenue Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
60 Other operating income Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
61 Total operating income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
62 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
63 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:GeneralAndAdministrativeExpense
64 Operating loss Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
65 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
66 Exchange gains/(losses) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
67 Loss before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
68 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
69 Loss for the year and total comprehensive loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
70 Weighted average number of shares outstanding Concept (Shares) For Period ifrs-full:WeightedAverageShares
71 Basic and diluted loss per share Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
72 00300 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS Network

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73 Implied Table Table

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74 CONSOLIDATED STATEMENT OF CASH FLOWS Abstract ifrs-full:StatementOfCashFlowsAbstract
75 CASH FLOWS (USED IN) / FROM OPERATING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
76 Operating result Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
77 Adjustments for non-cash items Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
78 Amortization of intangible assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForAmortisationExpense
79 Depreciation of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationExpense
80 Loss on disposal of fixed assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
81 Provisions for employee benefits Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForProvisions
82 Expense recognized in respect of share-based payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
83 Adjustments for non-cash items Concept (Monetary) For Period Debit argx:NetCashIncreaseDecreaseAfterNonCashItemAdjustments
84 Movements in current assets/liabilities Abstract argx:MovementsInCurrentAssetsOrLiabilitiesAbstract
85 (Increase)/decrease in trade and other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
86 (Increase)/decrease in other current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
87 Increase/(decrease) in trade and other payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
88 Increase/(decrease) in current deferred revenue Concept (Monetary) For Period Debit argx:AdjustmentsForIncreaseDecreaseInCurrentDeferredIncome
89 Movements in non-current assets/liabilities Abstract argx:MovementsInNonCurrentAssetsOrLiabilitiesAbstract
90 Increase)/decrease in other noncurrent assets Concept (Monetary) For Period Debit argx:AdjustmentsForDecreaseIncreaseInOtherNonCurrentAssets
91 (Increase)/decrease in non-current deferred revenue Concept (Monetary) For Period Debit argx:AdjustmentsForIncreaseDecreaseInNonCurrentDeferredIncome
92 Cash flows (used in)/from operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperations
93 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
94 NET CASH FLOWS (USED IN) / FROM OPERATING ACTIVITIES Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
95 CASH FLOWS (USED IN) / FROM INVESTING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
96 Purchase of intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
97 Purchase of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
98 (Increase)/decrease in current financial assets Concept (Monetary) For Period Debit argx:IncreaseDecreaseInCurrentFinancialAssets
99 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsInvestingActivities
100 NET CASH FLOWS (USED IN) / FROM INVESTING ACTIVITIES Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
101 CASH FLOWS (USED IN) / FROM FINANCING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
102 Proceeds from issue of new shares, gross amount Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
103 Issue costs paid Concept (Monetary) For Period Credit ifrs-full:PaymentsForShareIssueCosts
104 Exchange gain from currency conversion on proceeds from issue of new shares Concept (Monetary) For Period Debit argx:ExchangeGainFromCurrencyConversionOnProceedsFromIssueOfNewShares
105 Proceeds from exercise of stock options Concept (Monetary) For Period Debit ifrs-full:ProceedsFromExerciseOfOptions
106 NET CASH FLOWS (USED IN) / FROM FINANCING ACTIVITIES Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
107 NET INCREASE (DECREASE) IN CASH & CASH EQUIVALENTS Concept (Monetary) For Period Debit argx:IncreaseDecreaseInCashAndCashEquivalentsExcludingExchangeGainLoss
108 Cash and cash equivalents at the beginning of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
109 Exchange gains/(losses) on cash & cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
110 Cash and cash equivalents at the end of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
111 00400 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN EQUITY Network

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112 Statement of changes in equity [table] Table

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 ifrs-full:StatementOfChangesInEquityTable
113 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
114 Equity [member] Member ifrs-full:EquityMember
115 Share capital Member ifrs-full:ClassesOfShareCapitalMember
116 Share premium Member ifrs-full:SharePremiumMember
117 Accumulated losses Member ifrs-full:RetainedEarningsMember
118 Other reserves Member ifrs-full:OtherReservesMember
119 Total equity attributable to owners of the parent Member ifrs-full:EquityAttributableToOwnersOfParentMember
120 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
121 Equity at beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
122 Adoption of IFRS 15 (modified retrospective approach) Concept (Monetary) As Of Credit argx:IfrsCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
123 Total comprehensive loss of the period Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
124 Share-based payment Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
125 Issue of share capital (restated) Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
126 Transaction costs for equity issue (restated) Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
127 Exercise of stock options (restated) Concept (Monetary) For Period Credit argx:IncreaseDecreaseThroughExerciseOfOptionsEquity
128 Equity at end of period Concept (Monetary) As Of Credit ifrs-full:Equity
129 10101 - Disclosure - General information about the company Network

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130 Implied Table Table

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131 General information about the company Abstract argx:IfrsGeneralInformationAboutCompanyAbstract
132 General information about the company Concept (Text Block (HTML)) For Period argx:DisclosureOfGeneralInformationAboutCompanyTextBlock
133 10201 - Disclosure - Significant accounting policies Network

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134 Implied Table Table

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135 Significant accounting policies Abstract ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
136 Significant accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
137 10301 - Disclosure - Critical accounting judgements and key sources of estimation uncertainty Network

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138 Implied Table Table

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139 Critical accounting judgements and key sources of estimation uncertainty Abstract argx:CriticalAccountingJudgementsAndKeySourcesOfEstimationUncertaintyAbstract
140 Critical accounting judgements and key sources of estimation uncertainty Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
141 10401 - Disclosure - Notes relating to the consolidated statement of financial position Network

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142 Implied Table Table

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143 Notes relating to the consolidated statement of financial position Abstract argx:NotesRelatingToConsolidatedStatementOfFinancialPositionAbstract
144 Notes relating to the consolidated statement of financial position Concept (Text Block (HTML)) For Period argx:NotesRelatingToConsolidatedStatementOfFinancialPositionTextBlock
145 10501 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income Network

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146 Implied Table Table

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147 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
148 Notes to consolidated statement of profit and loss and other comprehensive income Concept (Text Block (HTML)) For Period argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeTextBlock
149 10601 - Disclosure - Financial instruments and financial risk management Network

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150 Implied Table Table

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151 Financial instruments and financial risk management Abstract ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
152 Financial instruments and financial risk management Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsExplanatory
153 10701 - Disclosure - Other disclosures Network

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154 Implied Table Table

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155 Other disclosures Abstract argx:OtherDisclosuresAbstract
156 Other disclosures Concept (Text Block (HTML)) For Period argx:OtherDisclosuresTextBlock
157 20202 - Disclosure - Significant accounting policies (Policies) Network

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158 Implied Table Table

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159 Significant accounting policies Abstract ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
160 Statement of compliance and basis of preparation Concept (Text Block (HTML)) For Period argx:StatementOfComplianceAndBasisOfPreparationPolicyTextBlock
161 Basis of consolidation Concept (Text Block (HTML)) For Period argx:DescriptionOfAccountingPolicyForBasisOfConsolidationPolicyTextBock
162 Foreign currency transactions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
163 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
164 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
165 Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
166 Impairment of assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
167 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
168 Trade and other receivables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
169 Research and development incentive receivables Concept (Text Block (HTML)) For Period argx:DescriptionOfAccountingPolicyForResearchAndDevelopmentIncentiveReceivablesPolicyTextBlock
170 Cash and cash equivalents Concept (Text Block (HTML)) For Period argx:DescriptionOfAccountingPolicyForCashAndCashEquivalentsPolicyTextBlock
171 Shareholder's equity Concept (Text Block (HTML)) For Period argx:DescriptionOfAccountingPolicyForShareholderSEquityPolicyTextBlock
172 Trade and other payables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
173 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
174 Retirement benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
175 Short-term employee benefits Concept (Text Block (HTML)) For Period argx:DescriptionOfAccountingPolicyForShortTermEmployeeBenefitsPolicyTextBlock
176 Share-based payments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
177 Deferred revenue Concept (Text Block (HTML)) For Period argx:DescriptionOfAccountingPolicyForDeferredRevenuePolicyTextBlock
178 Income taxes Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
179 Revenue and other operating income recognition Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
180 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
181 Adoption of new and revised standards Concept (Text Block (HTML)) For Period argx:DescriptionOfAdoptionOfNewAndRevisedStandardsPolicyTextBlock
182 Segment reporting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
183 30203 - Disclosure - Significant accounting policies (Tables) Network

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184 Implied Table Table

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185 Significant accounting policies Abstract ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
186 Schedule of cumulative effect of adoption Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations
187 30403 - Disclosure - Notes relating to the consolidated interim statement of financial position (Tables) Network

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188 Implied Table Table

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189 Notes relating to the consolidated statement of financial position Abstract argx:NotesRelatingToConsolidatedStatementOfFinancialPositionAbstract
190 Schedule of Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
191 Schedule of Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
192 Schedule of Research and development incentive receivables Concept (Text Block (HTML)) For Period argx:DisclosureOfResearchAndDevelopmentIncentiveReceivablesTableTextBlock
193 Schedule of Restricted cash Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRestrictedCashAndCashEquivalentsExplanatory
194 Schedule of Trade and other receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
195 Schedule of Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
196 Schedule of Shareholders' capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIssuedCapitalExplanatory
197 Schedule of Sharebased payment arrangements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
198 Schedule of number and weighted average exercise prices of share options roll forward Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
199 Schedule of weighted average remaining contractual life for each range of exercise price: Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory
200 Schedule of parameters used in relation to the new grants Concept (Text Block (HTML)) For Period argx:DisclosureOfParametersUsedInRelationToNewGrantsTableTextBlock
201 Schedule of Defined benefit plans Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
202 Schedule of movement in the defined benefit obligation, plan assets, net liability and asset Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAdditionalInformationAboutDefinedBenefitPlansExplanatory
203 Schedule of Actuarial assumption Concept (Text Block (HTML)) For Period argx:DisclosureOfActuarialAssumptionTableTextBlock
204 Schedule of Sensitivity analyses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
205 Schedule of Trade and other payables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
206 30503 - Disclosure - Notes to consolidated interim statement of profit and loss and other comprehensive income (Tables) Network

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207 Implied Table Table

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209 Schedule of revenue Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRevenueExplanatory
210 Schedule of other operating income Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory
211 Schedule of grants Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGovernmentGrantsExplanatory
212 Schedule of revenue and non-current assets generated geographically Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
213 Schedule of research and development expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfResearchAndDevelopmentExpenseExplanatory
214 Schedule of general and administrative expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralAndAdministrativeExpenseExplanatory
215 Schedule of personnel expenses Concept (Text Block (HTML)) For Period argx:DisclosureOfPersonnelExpensesTableTextBlock
216 Schedule of full-time equivalents employees Concept (Text Block (HTML)) For Period argx:DisclosureOfFullTimeEquivalentsEmployeesTableTextBlock
217 Schedule of operating lease commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
218 Schedule of financial result and exchange gains/(losses) Concept (Text Block (HTML)) For Period argx:DisclosureOfFinancialResultAndExchangeGainsLossesTableTextBlock
219 Schedule of income tax expenses Concept (Text Block (HTML)) For Period argx:IfrsScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
220 Schedule of loss per share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
221 30603 - Disclosure - Financial instruments and financial risk management (Tables) Network

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222 Implied Table Table

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224 Schedule of overview of financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
225 Schedule of assets at fair value Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueMeasurementOfAssetsExplanatory
226 Schedule of net exposure exchange differences of the monetary assets Concept (Text Block (HTML)) For Period ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk
227 30703 - Disclosure - Other disclosures (Tables) Network

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228 Disclosure of transactions between related parties [table] Table

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230 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
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232 Non-executive Directors Member argx:NonExecutiveDirectorsMember
233 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
234 Schedule of remuneration of key management personnel Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
235 Schedule of number and weighted average exercise prices of share options roll forward Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
236 Schedule of weighted average contractual term Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory
237 Schedule of auditors' fees expensed in the income statement Concept (Text Block (HTML)) For Period argx:DisclosureOfAuditorSFeesExpensedInIncomeStatementTableTextBlock
238 Schedule of overview of Subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
239 40201 - Disclosure - Significant accounting policies (Details) Network

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243 Software Member ifrs-full:ComputerSoftwareMember
244 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
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246 Increase (decrease) due to corrections of prior period errors Member ifrs-full:FinancialEffectOfCorrectionsOfAccountingErrorsMember
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250 Amortization period Concept (xbrli:durationItemType) For Period argx:UsefulLivesIntangibleAssetsOtherThanGoodwill
251 40202 - Disclosure - Significant accounting policies - Property Plant and Equipment and Others (Details) Network

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255 Office and lab equipment Member ifrs-full:OfficeEquipmentMember
256 IT equipment Member ifrs-full:ComputerEquipmentMember
257 Range [axis] Axis ifrs-full:RangeAxis
258 Ranges [member] Member ifrs-full:RangesMember
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386 40407 - Disclosure - Notes relating to the consolidated statement of financial position - Cash and cash equivalents (Details) Network

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387 Implied Table Table

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421 40409 - Disclosure - Notes relating to the consolidated statement of financial position - Share-based payments (Details) Network

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472 40410 - Disclosure - Notes relating to the consolidated statement of financial position - Share-based payments - Rollforward (Details) Network

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 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
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507 40412 - Disclosure - Notes relating to the consolidated statement of financial position - Share-based payments - Overview (Details) Network

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527 40413 - Disclosure - Notes relating to the consolidated statement of financial position - Defined Benefit Plans (Details) Network

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532 Maximum Member ifrs-full:TopOfRangeMember
533 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
534 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
535 Belgium Member country:BE
536 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
537 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
538 Defined benefit obligation Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
539 Fair value of plan assets Member ifrs-full:PlanAssetsMember
540 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
541 Guaranteed rate of return on employer contributions Concept (Percent) For Period argx:GuaranteedRateOfReturnOnEmployerContributions
542 Guaranteed rate of return on employee contributions Concept (Percent) For Period argx:GuaranteedRateOfReturnOnEmployeeContributions
543 Minimum guaranteed reserve Concept (Monetary) As Of Credit argx:MinimumGuaranteedReserves
544 Deficit / surplus () of funded obligations Concept (Monetary) As Of Debit ifrs-full:SurplusDeficitInPlan
545 Net liability (asset) Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
546 Employer contributions Concept (Monetary) For Period Credit ifrs-full:EmployerContributions
547 40414 - Disclosure - Notes relating to the consolidated statement of financial position - Defined Benefit Plans - Rollforward (Details) Network

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548 Disclosure of net defined benefit liability (asset) [table] Table

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549 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
550 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
551 Defined benefit obligation Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
552 Fair value of plan assets Member ifrs-full:PlanAssetsMember
553 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
554 Beginning balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
555 Service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
556 Interest expense / income () Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
557 Administrative costs and taxes Concept (Monetary) For Period Debit argx:CurrentAdministrativeCostsAndTaxesNetDefinedBenefitLiabilityAsset
558 Contributions by company & participants Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
559 Contributions by plan participants Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
560 Actuarial gains (+) / losses (-) Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
561 Benefits paid / transfers out Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
562 Ending balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
563 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
564 Term of Benefit Obligations Concept (xbrli:durationItemType) For Period argx:TermOfBenefitObligations
565 Weighted average age of the plan participants Concept (xbrli:durationItemType) For Period argx:WeightedAverageAgeOfPlan
566 40415 - Disclosure - Notes relating to the consolidated statement of financial position - Defined Benefit Plans - Sensitivity Analysis (Details) Network

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567 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

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568 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
569 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
570 Discount rate Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
571 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
572 Decrease in percentage Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
573 Increase in percentage Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
574 Defined benefit obligation increase due to increase in discount rate Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
575 Defined benefit obligation decrease due to decrease in discount rate Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
576 Defined benefit obligation increase (in percentage) Concept (Percent) For Period argx:PercentageChangeInDefinedBenefitObligationDueToDecreaseInDiscountRate
577 Defined benefit obligation decrease (in percentage) Concept (Percent) For Period argx:PercentageChangeInDefinedBenefitObligationDueToIncreaseInDiscountRate
578 40416 - Disclosure - Notes relating to the consolidated statement of financial position - Current tax liability (Details) Network

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579 Disclosure of subsidiaries [table] Table

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580 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
581 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
582 ARGENX BVBA Member argx:ArgenxBvbaSubsidiaryMember
583 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
584 Loss before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
585 Applicable tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
586 Current tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
587 Additional tax deductible costs Concept (Monetary) For Period Debit argx:AdditionalTaxDeductibleCosts
588 Deferred tax asset recognized Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
589 40417 - Disclosure - Notes relating to the consolidated statement of financial position - Trade and other payables (Details) Network

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590 Implied Table Table

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591 Notes relating to the consolidated statement of financial position Abstract argx:NotesRelatingToConsolidatedStatementOfFinancialPositionAbstract
592 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
593 Accruals for invoices to be received Concept (Monetary) As Of Credit ifrs-full:Accruals
594 Short-term employee benefits accruals Concept (Monetary) As Of Credit ifrs-full:ShorttermEmployeeBenefitsAccruals
595 40418 - Disclosure - Notes relating to the consolidated statement of financial position - Deferred revenue (Details) Network

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596 Disclosure of offsetting of financial assets [table] Table

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600 LEO Pharma collaboration Member argx:LeoPharmaAsMember
601 Disclosure of offsetting of financial assets [line items] LineItems ifrs-full:DisclosureOfOffsettingOfFinancialAssetsLineItems
602 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
603 Upfront Payments Received Concept (Monetary) For Period Credit argx:UpfrontPaymentsReceived
604 40501 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income (Details) Network

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605 Implied Table Table

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606 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
607 Upfront payments Concept (Monetary) For Period Credit argx:UpfrontPaymentsReceived
608 Milestone payments Concept (Monetary) For Period Credit argx:MilestonePaymentsReceived
609 Research and development service fees (FTE) Concept (Monetary) For Period Credit argx:ResearchAndDevelopmentServiceFeesReceived
610 Total revenue Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
611 Deferred revenue - current Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
612 40502 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Revenue (Details) Network

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613 Ifrs Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Table

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614 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
615 Counterparties [Member] Member ifrs-full:CounterpartiesMember
616 Shire Member argx:ShireInternationalGmbhMember
617 LEO Pharma collaboration Member argx:LeoPharmaAsMember
618 Staten Member argx:StatenBiotechnologyBvMember
619 AbbVie Member argx:AbbvieSarlMember
620 Notes to unaudited condensed consolidated interim statement of profit and loss and other comprehensive income LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
621 Milestone payments Concept (Monetary) For Period Credit argx:MilestonePaymentsReceived
622 Research and development service fees (FTE) Concept (Monetary) For Period Credit argx:ResearchAndDevelopmentServiceFeesReceived
623 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
624 Upfront, non-refundable, non-creditable payment received Concept (Monetary) For Period Debit argx:CollaborativeArrangementUpfrontNonrefundableNoncreditablePaymentReceived
625 Number of preclinical milestones achieved Concept (Integer) For Period argx:CollaborativeArrangementsNumberOfPreclinicalMilestonesAchieved
626 Amount of preclinical first milestone payment received Concept (Monetary) For Period Debit argx:CollaborativeArrangementsAmountOfPreclinicalMilestonesPaymentReceived
627 Amount of preclinical second milestone payment received Concept (Monetary) For Period Debit argx:CollaborativeArrangementsAmountOfPreclinicalSecondMilestonesPaymentReceived
628 Maximum additional development milestone payments Concept (Monetary) For Period Debit argx:CollaborativeArrangementMaximumAdditionalDevelopmentMilestonePaymentsToBeReceivedOnExerciseOfOption
629 Maximum additional regulatory milestone payments Concept (Monetary) For Period Debit argx:CollaborativeArrangementMaximumRegulatoryMilestonePaymentsToBeReceivedOnExerciseOfOption
630 Maximum additional commercial milestone payments Concept (Monetary) For Period Debit argx:CollaborativeArrangementMaximumCommercialMilestonePaymentsToBeReceivedOnExerciseOfOption
631 Term of additional GARP-related research funding Concept (xbrli:durationItemType) For Period argx:CollaborativeArrangementTermOfAdditionalFunding
632 Pre-IND payments including upfront payments received Concept (Monetary) For Period Debit argx:CollaborativeArrangementsPreIndPaymentsIncludingUpfrontPaymentsReceived
633 40503 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Other operating income (Details) Network

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634 Implied Table Table

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635 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
636 Grants Concept (Monetary) For Period Credit ifrs-full:RevenueFromGovernmentGrants
637 Research and development incentives Concept (Monetary) For Period Credit argx:ResearchAndDevelopmentIncentives
638 Payroll tax rebates Concept (Monetary) For Period Credit argx:PayrollTaxRebates
639 Total Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
640 40504 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Other operating income - Grants (Details) Network

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641 Disclosure of Government Grants [Table] Table

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642 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
643 Counterparties [Member] Member ifrs-full:CounterpartiesMember
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645 Flanders Innovation & Entrepreneurship-Baekelandt Member argx:FlandersInnovationEntrepreneurshipBaekelandtMember
646 Other operating income - Grants LineItems argx:DisclosureOfGovernmentGrantsLineItems
647 Amount granted and approved Concept (Monetary) As Of Debit argx:ResearchAndDevelopmentIncentiveReceivable
648 Amount recognized Concept (Monetary) As Of Debit argx:ProceedsFromGovernmentGrants
649 Number of conditions related to government grants that are unfulfilled Concept (Integer) As Of argx:NumberOfGovernmentGrantConditionsNotFulfilled
650 40505 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Other operating income - Other Incentives (Details) Network

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651 Implied Table Table

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653 Research and development incentives Concept (Monetary) For Period Credit argx:ResearchAndDevelopmentIncentives
654 Incentive refund period Concept (xbrli:durationItemType) For Period argx:RefundPeriodOfResearchAndDevelopmentIncentives
655 Payroll tax rebates Concept (Monetary) For Period Credit argx:PayrollTaxRebates
656 40506 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Segment reporting (Details) Network

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657 Disclosure of geographical areas [table] Table

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658 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
659 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
660 Netherlands Member country:NL
661 Germany Member country:DE
662 Denmark Member country:DK
663 Switzerland Member country:CH
664 United States Member country:US
665 Luxembourg Member country:LU
666 Notes to consolidated statement of profit and loss and other comprehensive income LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
667 Revenue from external customers Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
668 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
669 40507 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Segment reporting - Major clients (Details) Network

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670 Disclosure of major customers [table] Table

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673 Largest client Member argx:FirstLargestCustomerMember
674 Second largest client Member argx:SecondLargestCustomerMember
675 Third largest client Member argx:ThirdLargestCustomerMember
676 Segment reporting - Major clients LineItems ifrs-full:DisclosureOfMajorCustomersLineItems
677 Revenue Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
678 40508 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Research and development expenses (Details) Network

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679 Implied Table Table

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680 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
681 Personnel expenses Concept (Monetary) For Period Debit argx:EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses
682 External research and development expenses Concept (Monetary) For Period Debit argx:ExternalResearchAndDevelopmentExpenses
683 Materials and consumables Concept (Monetary) For Period Debit argx:RawMaterialsAndConsumablesUsedInResearchAndDevelopment
684 Depreciation and amortisation Concept (Monetary) For Period Debit argx:DepreciationAndAmortisationExpenseResearchAndDevelopment
685 Other expenses Concept (Monetary) For Period Debit argx:OtherResearchAndDevelopmentExpenses
686 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
687 40509 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Selling, general and administrative expenses (Details) Network

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688 Implied Table Table

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689 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
690 Personnel expenses Concept (Monetary) For Period Debit argx:EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses
691 Consulting fees Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
692 Supervisory board Concept (Monetary) For Period Debit argx:SupervisoryBoardExpenses
693 Office costs Concept (Monetary) For Period Debit argx:OfficeCosts
694 Total Concept (Monetary) For Period Debit ifrs-full:GeneralAndAdministrativeExpense
695 40510 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Personnel expenses (Details) Network

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696 Implied Table Table

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697 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
698 Short-term employee benefits - Salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
699 Short-term employee benefits - Social Security Concept (Monetary) For Period Debit ifrs-full:SocialSecurityContributions
700 Post-employment benefits Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
701 Termination benefits Concept (Monetary) For Period Debit ifrs-full:TerminationBenefitsExpense
702 Share-based payment Concept (Monetary) For Period Debit argx:ExpensesFromShareBasedPaymentTransactions
703 Employer social security contributions stock options Concept (Monetary) For Period Debit argx:ExpensesFromEmployerSocialSecurityContributionStockOptions
704 Total employee benefits expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
705 40511 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Personnel expenses FTE (Details) Network

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706 Implied Table Table

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707 Notes to consolidated statement of profit and loss and other comprehensive income Abstract argx:DisclosureOfNotesToConsolidatedStatementOfProfitAndLossAndOtherComprehensiveIncomeAbstract
708 Research and development Concept (Decimal) For Period argx:NumberOfEmployeesInResearchAndDevelopment
709 General and administrative Concept (Decimal) For Period argx:NumberOfEmployeesInGeneralAndAdministrative
710 Number of FTE Concept (Decimal) For Period ifrs-full:AverageNumberOfEmployees
711 40512 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Operating leases (Details) Network

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712 Disclosure of finance lease and operating lease by lessee [table] Table

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713 Maturity [axis] Axis ifrs-full:MaturityAxis
714 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
715 Less than 1 year Member ifrs-full:NotLaterThanOneYearMember
716 1-3 years Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
717 3-5 years Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
718 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
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720 Cars Member ifrs-full:MotorVehiclesMember
721 Laboratory and office space Member argx:LaboratoryAndOfficeSpaceLeaseArrangementMember
722 Range [axis] Axis ifrs-full:RangeAxis
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724 Maximum Member ifrs-full:TopOfRangeMember
725 Operating leases LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
726 Operating lease payments recognized as expense Concept (Monetary) For Period Debit ifrs-full:LeaseAndSubleasePaymentsRecognisedAsExpense
727 Operating lease payments recognized as expense in research and development expenses Concept (Monetary) For Period Debit argx:LeaseAndSubleasePaymentsRecognisedAsExpenseInResearchAndDevelopmentExpenses
728 Operating lease payments recognized as expense in selling, general and administrative expenses Concept (Monetary) For Period Debit argx:LeaseAndSubleasePaymentsRecognisedAsExpenseInSellingGeneralAndAdministrativeExpenses
729 Operating lease commitments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
730 Maturity term of lease Concept (xbrli:durationItemType) For Period argx:IfrsLesseeLeasingArrangementsOperatingLeasesTermOfContract
731 Minimum period of notice for lease termination Concept (xbrli:durationItemType) For Period argx:MinimumPeriodOfNoticeForLeaseTermination
732 First anniversary of lease termination possibility Concept (xbrli:durationItemType) For Period argx:TermOfLeaseTerminationPeriodOne
733 Second anniversary of lease termination possibility Concept (xbrli:durationItemType) For Period argx:TermOfLeaseTerminationPeriodTwo
734 40513 - Disclosure - Notes to unaudited condensed consolidated interim statement of profit and loss and other comprehensive income - Financial result and exchange gains/(losses) (Details) Network

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735 Implied Table Table

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737 Interest income on bank deposits Concept (Monetary) For Period Credit ifrs-full:InterestIncomeOnDeposits
738 Net gains on current financial assets at FVTPL Concept (Monetary) For Period Credit argx:NetGainsOnFinancialAssetsAtFairValueThroughProfitOrLoss
739 Realized gain on non-current financial assets Concept (Monetary) For Period Credit argx:GainLossOnSaleOfNonCurrentFinancialInvestmentAsset
740 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
741 Realized exchange gains/(losses) Concept (Monetary) For Period Credit argx:GainsLossesOnExchangeDifferencesOnTranslationRealizedBeforetax
742 Unrealized exchange gains/(losses) Concept (Monetary) For Period Credit argx:GainsLossesOnExchangeDifferencesOnTranslationUnrealizedBeforeTax
743 Exchange gains/(losses) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
744 40514 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Income tax expense (Details) Network

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745 Disclosure of geographical areas [table] Table

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746 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
747 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
748 Netherlands Member country:NL
749 Belgium Member country:BE
750 Notes to consolidated statement of profit and loss and other comprehensive income LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
751 Loss before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
752 Income tax calculated at 25% Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
753 Effect of expenses that are not deductible in determining taxable results Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
754 Effect of stock issue expenses that are not deductible in determining taxable results Concept (Monetary) For Period Debit argx:TaxEffectOfStockIssueExpensesNotDeductibleInDeterminingTaxableProfitTaxLoss
755 Effect of concessions (R&D incentives and grants) Concept (Monetary) For Period Debit argx:TaxEffectOfConcessionsResearchAndDevelopmentIncentivesAndGrants
756 Effect of tax losses carried forward not recognized Concept (Monetary) For Period Debit argx:TaxEffectOfTaxLossesCarriedForwardNotRecognized
757 Effect of usage of tax losses carried forward not previously recognized Concept (Monetary) For Period Credit argx:TaxEffectOfUsageOfTaxLossesCarriedForwardNotPreviouslyRecognized
758 Effect of change in corporate tax rate on deferred tax asset not previously recognized (Belgium) Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
759 Effect of different tax rates in jurisdictions in which the company operates Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
760 Deferred tax asset other than loss carryforwards not recognized Concept (Monetary) For Period Debit argx:TaxEffectOfDeferredTaxAssetOtherThanCarryforwardsNotRecognized
761 Other Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
762 Income tax expense recognized in the consolidated statement of profit and loss Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
763 40515 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Income tax expense - Deferred tax assets (Details) Network

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764 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

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765 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
766 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
767 Temporary differences and unused tax losses Member argx:TemporaryDifferenceAndUnusedTaxLossesMember
768 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
769 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
770 Netherlands Member country:NL
771 Belgium Member country:BE
772 Income tax expense - Deferred tax assets LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
773 Unrecognized deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
774 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
775 Tax rate applicable Concept (Percent) For Period ifrs-full:ApplicableTaxRate
776 40516 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Income tax expense - Restructuring (Details) Network

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777 Disclosure of geographical areas [table] Table

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778 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
779 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
780 ARGENX BVBA Member argx:ArgenxBvbaSubsidiaryMember
781 Notes to consolidated statement of profit and loss and other comprehensive income LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
782 Additional tax deductible costs Concept (Monetary) For Period Debit argx:AdditionalTaxDeductibleCosts
783 40517 - Disclosure - Notes to consolidated statement of profit and loss and other comprehensive income - Loss per share (Details) Network

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784 Implied Table Table

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788 Basic and diluted loss per share Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
789 Other instruments that could potentially dilute earnings per ordinary share in the future Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
790 40601 - Disclosure - Financial instruments and financial risk management (Details) Network

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816 Carrying amount of assets under IFRS 9 Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
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819 40602 - Disclosure - Financial instruments and financial risk management - Fair value (Details) Network

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820 Disclosure of fair value measurement of assets [table] Table

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830 Transfers out of Level 1 to Level 2 liabilities Concept (Monetary) For Period ifrs-full:TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyLiabilities
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837 40603 - Disclosure - Financial instruments and financial risk management - Capital risk (Details) Network

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838 Implied Table Table

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842 40604 - Disclosure - Financial instruments and financial risk management - Credit risk (Details) Network

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857 40605 - Disclosure - Financial instruments and financial risk management - Interest rate risk (Details) Network

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865 40606 - Disclosure - Financial instruments and financial risk management - Foreign exchange risk (Details) Network

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 http://www.argenx.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementForeignExchangeRiskDetails
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880 40701 - Disclosure - Other disclosures - Related party transactions (Details) Network

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881 Implied Table Table

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889 40702 - Disclosure - Other disclosures - Related party transactions - Executive directors remuneration (Details) Network

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904 40703 - Disclosure - Other disclosures - Related party transactions - Executive directors ESOP (Details) Network

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 http://www.argenx.com/role/DisclosureOtherDisclosuresRelatedPartyTransactionsExecutiveDirectorsEsopDetails
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931 40704 - Disclosure - Other disclosures - Related party transactions - Executive directors ESOP - Rollforward and Vesting (Details) Network

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 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
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959 40705 - Disclosure - Other disclosures - Related party transactions - Executive directors ESOP - Remaining term (Details) Network

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983 40706 - Disclosure - Other disclosures - Related party transactions - Remuneration of non-executive directors (Details) Network

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 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
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997 40707 - Disclosure - Other disclosures - Related party transactions - Non-executive directors ESOP (Details) Network

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 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
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1025 40708 - Disclosure - Other disclosures - Related party transactions - Non-executive directors ESOP - Rollforward and vesting (Details) Network

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 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
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1061 40709 - Disclosure - Other disclosures - Related party transactions - Non-executive directors ESOP - Remaining term (Details) Network

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1062 Disclosure of number and weighted average remaining contractual life of outstanding share options [table] Table

*

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 ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsTable
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1077 2.0 years Member argx:TwoYearsMember
1078 4.5 years Member argx:FourAndHalfYearsMember
1079 5.0 years Member argx:FiveYearsMember
1080 6.0 years Member argx:SixYearsMember
1081 6.5 years Member argx:SixAndHalfYearsMember
1082 7.0 years Member argx:SevenYearsMember
1083 7.5 years Member argx:SevenAndHalfYearsMember
1084 8.0 years Member argx:EightYearsMember
1085 9.0 years Member argx:NineYearsMember
1086 9.5 years Member argx:NineAndHalfYearsMember
1087 10.0 years Member argx:TenYearsMember
1088 Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] LineItems ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems
1089 Number of options Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1090 Remaining term Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
1091 Exercise of Options Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1092 40710 - Disclosure - Other disclosures - Commitments (Details) Network

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 http://www.argenx.com/role/DisclosureOtherDisclosuresCommitmentsDetails
1093 Commitments [Table] Table

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 argx:CommitmentsTable
1094 Range [axis] Axis ifrs-full:RangeAxis
1095 Ranges [member] Member ifrs-full:RangesMember
1096 Minimum Member ifrs-full:BottomOfRangeMember
1097 Maximum Member ifrs-full:TopOfRangeMember
1098 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1099 Counterparties [Member] Member ifrs-full:CounterpartiesMember
1100 Lonza Sales AG Member argx:LonzaSalesAgMember
1101 Ifrs Type of Arrangement and Non-arrangement Transactions [Axis] Axis argx:IfrsTypeOfArrangementAndNonArrangementTransactionsAxis
1102 Arrangements and Non-arrangement Transactions [Domain] Member argx:ArrangementsAndNonArrangementTransactionsDomain
1103 ARGX-110 Member argx:ManufacturingAgreementForArgx110Member
1104 Commitments [Line Items] LineItems argx:CommitmentsLineItems
1105 Number of options granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1106 Estimated exposure of stock option Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentLiabilities
1107 Commitments to acquire property, plant and equipment Concept (Monetary) As Of Credit ifrs-full:ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment
1108 Commitments to acquire additional intangible assets Concept (Monetary) As Of Credit ifrs-full:ContractualCommitmentsForAcquisitionOfIntangibleAssets
1109 Contractual obligations Concept (Monetary) As Of Credit argx:IfrsContractualObligation
1110 Contractual period Concept (xbrli:durationItemType) For Period argx:ContractualPeriod
1111 Outstanding commitment Concept (Monetary) As Of Credit ifrs-full:CapitalCommitments
1112 40711 - Disclosure - Other disclosures - Audit Fees (Details) Network

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 http://www.argenx.com/role/DisclosureOtherDisclosuresAuditFeesDetails
1113 Implied Table Table

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 implied:Table
1114 Other disclosures Abstract argx:OtherDisclosuresAbstract
1115 Audit fees(1) Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForAuditServices
1116 Audit-related fees Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForOtherServices
1117 Tax and other services(2) Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForTaxServices
1118 Total Concept (Monetary) For Period Debit ifrs-full:AuditorsRemuneration
1119 40712 - Disclosure - Other disclosures - Overview of Subsidiaries and Subsequent Events (Details) Network

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 http://www.argenx.com/role/DisclosureOtherDisclosuresOverviewOfSubsidiariesAndSubsequentEventsDetails
1120 Disclosure of subsidiaries [table] Table

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 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1121 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1122 Counterparties [Member] Member ifrs-full:CounterpartiesMember
1123 Janssen Member argx:JanssenMember
1124 Halozyme Member argx:HalozymeMember
1125 AbbVie Member argx:AbbvieSarlMember
1126 Ifrs Sale of Stock [Axis] Axis argx:IfrsSaleOfStockAxis
1127 Sale of Stock [Domain] Member argx:SaleOfStockDomain
1128 Private placement (Sunflower) Member argx:IfrsPrivatePlacementMember
1129 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1130 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1131 ARGENX BVBA Member argx:ArgenxBvbaSubsidiaryMember
1132 ARGENX US INC Member argx:ArgenxUsIncMember
1133 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1134 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1135 Netherlands Member country:NL
1136 Belgium Member country:BE
1137 United States Member country:US
1138 IFRS Subsequent Event Type [Axis] Axis argx:IfrsSubsequentEventTypeAxis
1139 IFRS Subsequent Event Type [Domain] Member argx:IfrsSubsequentEventTypeDomain
1140 Subsequent Event Member argx:IfrsSubsequentEventMember
1141 Range [axis] Axis ifrs-full:RangeAxis
1142 Ranges [member] Member ifrs-full:RangesMember
1143 Maximum Member ifrs-full:TopOfRangeMember
1144 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1145 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1146 Share transaction Member ifrs-full:PotentialOrdinaryShareTransactionsMember
1147 Collaboration agreement transaction Member argx:CollaborationAgreementTransactionMember
1148 New lease agreement Member argx:NewLeaseAgreementMember
1149 Overview of consolidation scope LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1150 Number of subsidiaries Concept (Integer) As Of argx:NumberOfSubsidiaries
1151 Participation ( as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1152 Subsequent Events Abstract argx:IrfsSubsequentEventsAbstract
1153 Area of lease Concept (num:areaItemType) As Of argx:Ifrs_AreaOfRealEstateProperty
1154 Future lease commitments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1155 New shares issued for private placement, initial public offering, public offering and underwriters' over-allotment option Concept (Shares) For Period argx:IncreaseDecreaseInNumberOfSharesOutstandingDueToNewSharesIssuedForPrivatePlacementInitialPublicOfferingAndPublicOffering
1156 Share price Concept (Share) For Period argx:IfrsSharePrice
1157 Upfront payment received Concept (Monetary) For Period Debit argx:UpfrontPaymentReceived
1158 Development, regulatory and sales milestones receivable Concept (Monetary) As Of Debit argx:DevelopmentRegulatoryAndSalesMilestonesReceivable
1159 Proportionate share of economics Concept (Text/String) For Period argx:ProportionOfShareOfEconomics
1160 Upfront payment Concept (Monetary) For Period Credit argx:UpfrontPayment
1161 Additional payment for each target Concept (Monetary) As Of Credit argx:AdditionalPaymentPayableEachTarget
1162 Future milestone payments Concept (Monetary) As Of Credit argx:FutureMilestonePaymentsAllTargets
1163 Development milestone payment received Concept (Monetary) For Period Debit argx:CollaborativeArrangementsAmountOfDevelopmentMilestonesPaymentReceived

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