3.24.1 html 654 480 1 false 175 0 false 12 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.argenx.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION Sheet http://www.argenx.com/role/StatementConsolidatedStatementsOfFinancialPosition CONSOLIDATED STATEMENTS OF FINANCIAL POSITION Statements 2 false false R3.htm 00200 - Statement - CONSOLIDATED STATEMENTS OF PROFIT OR LOSS Sheet http://www.argenx.com/role/StatementConsolidatedStatementsOfProfitOrLoss CONSOLIDATED STATEMENTS OF PROFIT OR LOSS Statements 3 false false R4.htm 00300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Sheet http://www.argenx.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statements 4 false false R5.htm 00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.argenx.com/role/StatementConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 5 false false R6.htm 00500 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Sheet http://www.argenx.com/role/StatementConsolidatedStatementsOfChangesInEquity CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Statements 6 false false R7.htm 10101 - Disclosure - General information about the company Sheet http://www.argenx.com/role/DisclosureGeneralInformationAboutCompany General information about the company Notes 7 false false R8.htm 10201 - Disclosure - Material accounting policy information Sheet http://www.argenx.com/role/DisclosureMaterialAccountingPolicyInformation Material accounting policy information Notes 8 false false R9.htm 10301 - Disclosure - Critical accounting estimates and judgments Sheet http://www.argenx.com/role/DisclosureCriticalAccountingEstimatesAndJudgments Critical accounting estimates and judgments Notes 9 false false R10.htm 10401 - Disclosure - Property, plant and equipment Sheet http://www.argenx.com/role/DisclosurePropertyPlantAndEquipment Property, plant and equipment Notes 10 false false R11.htm 10501 - Disclosure - Intangible assets Sheet http://www.argenx.com/role/DisclosureIntangibleAssets Intangible assets Notes 11 false false R12.htm 10601 - Disclosure - Other non-current assets Sheet http://www.argenx.com/role/DisclosureOtherNonCurrentAssets Other non-current assets Notes 12 false false R13.htm 10701 - Disclosure - Inventories Sheet http://www.argenx.com/role/DisclosureInventories Inventories Notes 13 false false R14.htm 10801 - Disclosure - Prepaid expenses (Current) Sheet http://www.argenx.com/role/DisclosurePrepaidExpensesCurrent Prepaid expenses (Current) Notes 14 false false R15.htm 10901 - Disclosure - Trade and other receivables Sheet http://www.argenx.com/role/DisclosureTradeAndOtherReceivables Trade and other receivables Notes 15 false false R16.htm 11001 - Disclosure - Financial assets - current Sheet http://www.argenx.com/role/DisclosureFinancialAssetsCurrent Financial assets - current Notes 16 false false R17.htm 11101 - Disclosure - Cash and cash equivalents Sheet http://www.argenx.com/role/DisclosureCashAndCashEquivalents Cash and cash equivalents Notes 17 false false R18.htm 11201 - Disclosure - Share capital and share premium Sheet http://www.argenx.com/role/DisclosureShareCapitalAndSharePremium Share capital and share premium Notes 18 false false R19.htm 11301 - Disclosure - Share-based payments Sheet http://www.argenx.com/role/DisclosureShareBasedPayments Share-based payments Notes 19 false false R20.htm 11401 - Disclosure - Trade and other payables Sheet http://www.argenx.com/role/DisclosureTradeAndOtherPayables Trade and other payables Notes 20 false false R21.htm 11501 - Disclosure - Product net sales Sheet http://www.argenx.com/role/DisclosureProductNetSales Product net sales Notes 21 false false R22.htm 11601 - Disclosure - Collaboration revenue Sheet http://www.argenx.com/role/DisclosureCollaborationRevenue Collaboration revenue Notes 22 false false R23.htm 11701 - Disclosure - Other operating income Sheet http://www.argenx.com/role/DisclosureOtherOperatingIncome Other operating income Notes 23 false false R24.htm 11801 - Disclosure - Segment reporting Sheet http://www.argenx.com/role/DisclosureSegmentReporting Segment reporting Notes 24 false false R25.htm 11901 - Disclosure - Research and development expenses Sheet http://www.argenx.com/role/DisclosureResearchAndDevelopmentExpenses Research and development expenses Notes 25 false false R26.htm 12001 - Disclosure - Selling, general and administrative expenses Sheet http://www.argenx.com/role/DisclosureSellingGeneralAndAdministrativeExpenses Selling, general and administrative expenses Notes 26 false false R27.htm 12101 - Disclosure - Personnel expenses Sheet http://www.argenx.com/role/DisclosurePersonnelExpenses Personnel expenses Notes 27 false false R28.htm 12201 - Disclosure - Leases Sheet http://www.argenx.com/role/DisclosureLeases Leases Notes 28 false false R29.htm 12301 - Disclosure - Financial result and exchange gains (losses) Sheet http://www.argenx.com/role/DisclosureFinancialResultAndExchangeGainsLosses Financial result and exchange gains (losses) Notes 29 false false R30.htm 12401 - Disclosure - Income taxes Sheet http://www.argenx.com/role/DisclosureIncomeTaxes Income taxes Notes 30 false false R31.htm 12501 - Disclosure - Loss per share Sheet http://www.argenx.com/role/DisclosureLossPerShare Loss per share Notes 31 false false R32.htm 12601 - Disclosure - Financial risk management Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagement Financial risk management Notes 32 false false R33.htm 12701 - Disclosure - Related party transactions Sheet http://www.argenx.com/role/DisclosureRelatedPartyTransactions Related party transactions Notes 33 false false R34.htm 12801 - Disclosure - Contingencies Sheet http://www.argenx.com/role/DisclosureContingencies Contingencies Notes 34 false false R35.htm 12901 - Disclosure - Commitments Sheet http://www.argenx.com/role/DisclosureCommitments Commitments Notes 35 false false R36.htm 13001 - Disclosure - Audit fees Sheet http://www.argenx.com/role/DisclosureAuditFees Audit fees Notes 36 false false R37.htm 13101 - Disclosure - Overview of consolidation scope Sheet http://www.argenx.com/role/DisclosureOverviewOfConsolidationScope Overview of consolidation scope Notes 37 false false R38.htm 13201 - Disclosure - Events after the balance sheet date Sheet http://www.argenx.com/role/DisclosureEventsAfterBalanceSheetDate Events after the balance sheet date Notes 38 false false R39.htm 20202 - Disclosure - Material accounting policy information (Policies) Sheet http://www.argenx.com/role/DisclosureMaterialAccountingPolicyInformationPolicies Material accounting policy information (Policies) Policies 39 false false R40.htm 30403 - Disclosure - Property, plant and equipment (Tables) Sheet http://www.argenx.com/role/DisclosurePropertyPlantAndEquipmentTables Property, plant and equipment (Tables) Tables http://www.argenx.com/role/DisclosurePropertyPlantAndEquipment 40 false false R41.htm 30503 - Disclosure - Intangible assets (Tables) Sheet http://www.argenx.com/role/DisclosureIntangibleAssetsTables Intangible assets (Tables) Tables http://www.argenx.com/role/DisclosureIntangibleAssets 41 false false R42.htm 30603 - Disclosure - Other non-current assets (Tables) Sheet http://www.argenx.com/role/DisclosureOtherNonCurrentAssetsTables Other non-current assets (Tables) Tables http://www.argenx.com/role/DisclosureOtherNonCurrentAssets 42 false false R43.htm 30703 - Disclosure - Inventories (Tables) Sheet http://www.argenx.com/role/DisclosureInventoriesTables Inventories (Tables) Tables http://www.argenx.com/role/DisclosureInventories 43 false false R44.htm 30803 - Disclosure - Prepaid expenses (Current) (Tables) Sheet http://www.argenx.com/role/DisclosurePrepaidExpensesCurrentTables Prepaid expenses (Current) (Tables) Tables http://www.argenx.com/role/DisclosurePrepaidExpensesCurrent 44 false false R45.htm 30903 - Disclosure - Trade and other receivables (Tables) Sheet http://www.argenx.com/role/DisclosureTradeAndOtherReceivablesTables Trade and other receivables (Tables) Tables http://www.argenx.com/role/DisclosureTradeAndOtherReceivables 45 false false R46.htm 31003 - Disclosure - Financial assets - current (Tables) Sheet http://www.argenx.com/role/DisclosureFinancialAssetsCurrentTables Financial assets - current (Tables) Tables http://www.argenx.com/role/DisclosureFinancialAssetsCurrent 46 false false R47.htm 31103 - Disclosure - Cash and cash equivalents (Tables) Sheet http://www.argenx.com/role/DisclosureCashAndCashEquivalentsTables Cash and cash equivalents (Tables) Tables http://www.argenx.com/role/DisclosureCashAndCashEquivalents 47 false false R48.htm 31203 - Disclosure - Share capital and share premium (Tables) Sheet http://www.argenx.com/role/DisclosureShareCapitalAndSharePremiumTables Share capital and share premium (Tables) Tables http://www.argenx.com/role/DisclosureShareCapitalAndSharePremium 48 false false R49.htm 31303 - Disclosure - Share-based payments (Tables) Sheet http://www.argenx.com/role/DisclosureShareBasedPaymentsTables Share-based payments (Tables) Tables http://www.argenx.com/role/DisclosureShareBasedPayments 49 false false R50.htm 31403 - Disclosure - Trade and other payables (Tables) Sheet http://www.argenx.com/role/DisclosureTradeAndOtherPayablesTables Trade and other payables (Tables) Tables http://www.argenx.com/role/DisclosureTradeAndOtherPayables 50 false false R51.htm 31503 - Disclosure - Product net sales (Tables) Sheet http://www.argenx.com/role/DisclosureProductNetSalesTables Product net sales (Tables) Tables http://www.argenx.com/role/DisclosureProductNetSales 51 false false R52.htm 31603 - Disclosure - Collaboration revenue (Tables) Sheet http://www.argenx.com/role/DisclosureCollaborationRevenueTables Collaboration revenue (Tables) Tables http://www.argenx.com/role/DisclosureCollaborationRevenue 52 false false R53.htm 31703 - Disclosure - Other operating income (Tables) Sheet http://www.argenx.com/role/DisclosureOtherOperatingIncomeTables Other operating income (Tables) Tables http://www.argenx.com/role/DisclosureOtherOperatingIncome 53 false false R54.htm 31803 - Disclosure - Segment reporting (Tables) Sheet http://www.argenx.com/role/DisclosureSegmentReportingTables Segment reporting (Tables) Tables http://www.argenx.com/role/DisclosureSegmentReporting 54 false false R55.htm 31903 - Disclosure - Research and development expenses (Tables) Sheet http://www.argenx.com/role/DisclosureResearchAndDevelopmentExpensesTables Research and development expenses (Tables) Tables http://www.argenx.com/role/DisclosureResearchAndDevelopmentExpenses 55 false false R56.htm 32003 - Disclosure - Selling, general and administrative expenses (Tables) Sheet http://www.argenx.com/role/DisclosureSellingGeneralAndAdministrativeExpensesTables Selling, general and administrative expenses (Tables) Tables http://www.argenx.com/role/DisclosureSellingGeneralAndAdministrativeExpenses 56 false false R57.htm 32103 - Disclosure - Personnel expenses (Tables) Sheet http://www.argenx.com/role/DisclosurePersonnelExpensesTables Personnel expenses (Tables) Tables http://www.argenx.com/role/DisclosurePersonnelExpenses 57 false false R58.htm 32203 - Disclosure - Leases (Tables) Sheet http://www.argenx.com/role/DisclosureLeasesTables Leases (Tables) Tables http://www.argenx.com/role/DisclosureLeases 58 false false R59.htm 32303 - Disclosure - Financial result and exchange gains(losses) (Tables) Sheet http://www.argenx.com/role/DisclosureFinancialResultAndExchangeGainsLossesTables Financial result and exchange gains(losses) (Tables) Tables http://www.argenx.com/role/DisclosureFinancialResultAndExchangeGainsLosses 59 false false R60.htm 32403 - Disclosure - Income taxes (Tables) Sheet http://www.argenx.com/role/DisclosureIncomeTaxesTables Income taxes (Tables) Tables http://www.argenx.com/role/DisclosureIncomeTaxes 60 false false R61.htm 32503 - Disclosure - Loss per share (Tables) Sheet http://www.argenx.com/role/DisclosureLossPerShareTables Loss per share (Tables) Tables http://www.argenx.com/role/DisclosureLossPerShare 61 false false R62.htm 32603 - Disclosure - Financial risk management (Tables) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementTables Financial risk management (Tables) Tables http://www.argenx.com/role/DisclosureFinancialRiskManagement 62 false false R63.htm 32703 - Disclosure - Related party transactions (Tables) Sheet http://www.argenx.com/role/DisclosureRelatedPartyTransactionsTables Related party transactions (Tables) Tables http://www.argenx.com/role/DisclosureRelatedPartyTransactions 63 false false R64.htm 33003 - Disclosure - Audit fees (Tables) Sheet http://www.argenx.com/role/DisclosureAuditFeesTables Audit fees (Tables) Tables http://www.argenx.com/role/DisclosureAuditFees 64 false false R65.htm 33103 - Disclosure - Overview of consolidation scope (Tables) Sheet http://www.argenx.com/role/DisclosureOverviewOfConsolidationScopeTables Overview of consolidation scope (Tables) Tables http://www.argenx.com/role/DisclosureOverviewOfConsolidationScope 65 false false R66.htm 40401 - Disclosure - Property, plant and equipment (Details) Sheet http://www.argenx.com/role/DisclosurePropertyPlantAndEquipmentDetails Property, plant and equipment (Details) Details http://www.argenx.com/role/DisclosurePropertyPlantAndEquipmentTables 66 false false R67.htm 40501 - Disclosure - Intangible assets (Details) Sheet http://www.argenx.com/role/DisclosureIntangibleAssetsDetails Intangible assets (Details) Details http://www.argenx.com/role/DisclosureIntangibleAssetsTables 67 false false R68.htm 40601 - Disclosure - Other non-current assets - (Details) Sheet http://www.argenx.com/role/DisclosureOtherNonCurrentAssetsDetails Other non-current assets - (Details) Details http://www.argenx.com/role/DisclosureOtherNonCurrentAssetsTables 68 false false R69.htm 40602 - Disclosure - Other non-current assets - Fair Value (Details) Sheet http://www.argenx.com/role/DisclosureOtherNonCurrentAssetsFairValueDetails Other non-current assets - Fair Value (Details) Details 69 false false R70.htm 40603 - Disclosure - Other non-current assets - License agreement (Details) Sheet http://www.argenx.com/role/DisclosureOtherNonCurrentAssetsLicenseAgreementDetails Other non-current assets - License agreement (Details) Details 70 false false R71.htm 40701 - Disclosure - Inventories (Details) Sheet http://www.argenx.com/role/DisclosureInventoriesDetails Inventories (Details) Details http://www.argenx.com/role/DisclosureInventoriesTables 71 false false R72.htm 40801 - Disclosure - Prepaid expenses (Current) (Details) Sheet http://www.argenx.com/role/DisclosurePrepaidExpensesCurrentDetails Prepaid expenses (Current) (Details) Details http://www.argenx.com/role/DisclosurePrepaidExpensesCurrentTables 72 false false R73.htm 40901 - Disclosure - Trade and other receivables (Details) Sheet http://www.argenx.com/role/DisclosureTradeAndOtherReceivablesDetails Trade and other receivables (Details) Details http://www.argenx.com/role/DisclosureTradeAndOtherReceivablesTables 73 false false R74.htm 41001 - Disclosure - Financial assets - current (Details) Sheet http://www.argenx.com/role/DisclosureFinancialAssetsCurrentDetails Financial assets - current (Details) Details http://www.argenx.com/role/DisclosureFinancialAssetsCurrentTables 74 false false R75.htm 41101 - Disclosure - Cash and cash equivalents (Details) Sheet http://www.argenx.com/role/DisclosureCashAndCashEquivalentsDetails Cash and cash equivalents (Details) Details http://www.argenx.com/role/DisclosureCashAndCashEquivalentsTables 75 false false R76.htm 41201 - Disclosure - Share capital and share premium (Details) Sheet http://www.argenx.com/role/DisclosureShareCapitalAndSharePremiumDetails Share capital and share premium (Details) Details http://www.argenx.com/role/DisclosureShareCapitalAndSharePremiumTables 76 false false R77.htm 41202 - Disclosure - Share capital and share premium - Narrative (Details) Sheet http://www.argenx.com/role/DisclosureShareCapitalAndSharePremiumNarrativeDetails Share capital and share premium - Narrative (Details) Details 77 false false R78.htm 41301 - Disclosure - Share based payments - Outstanding stock options (Details) Sheet http://www.argenx.com/role/DisclosureShareBasedPaymentsOutstandingStockOptionsDetails Share based payments - Outstanding stock options (Details) Details 78 false false R79.htm 41302 - Disclosure - Share-based payments - Rollforward (Details) Sheet http://www.argenx.com/role/DisclosureShareBasedPaymentsRollforwardDetails Share-based payments - Rollforward (Details) Details 79 false false R80.htm 41303 - Disclosure - Share-based payments - Overview (Details) Sheet http://www.argenx.com/role/DisclosureShareBasedPaymentsOverviewDetails Share-based payments - Overview (Details) Details 80 false false R81.htm 41304 - Disclosure - Share-based payments - Range of exercise price (Details) Sheet http://www.argenx.com/role/DisclosureShareBasedPaymentsRangeOfExercisePriceDetails Share-based payments - Range of exercise price (Details) Details 81 false false R82.htm 41305 - Disclosure - Share-based payments - Restricted Stock Units (Details) Sheet http://www.argenx.com/role/DisclosureShareBasedPaymentsRestrictedStockUnitsDetails Share-based payments - Restricted Stock Units (Details) Details 82 false false R83.htm 41401 - Disclosure - Trade and other payables (Details) Sheet http://www.argenx.com/role/DisclosureTradeAndOtherPayablesDetails Trade and other payables (Details) Details http://www.argenx.com/role/DisclosureTradeAndOtherPayablesTables 83 false false R84.htm 41402 - Disclosure - Trade and other payables - Movement in net accruals (Details) Sheet http://www.argenx.com/role/DisclosureTradeAndOtherPayablesMovementInNetAccrualsDetails Trade and other payables - Movement in net accruals (Details) Details 84 false false R85.htm 41501 - Disclosure - Product net sales - (Details) Sheet http://www.argenx.com/role/DisclosureProductNetSalesDetails Product net sales - (Details) Details http://www.argenx.com/role/DisclosureProductNetSalesTables 85 false false R86.htm 41601 - Disclosure - Collaboration revenue (Details) Sheet http://www.argenx.com/role/DisclosureCollaborationRevenueDetails Collaboration revenue (Details) Details http://www.argenx.com/role/DisclosureCollaborationRevenueTables 86 false false R87.htm 41602 - Disclosure - Collaboration revenue - Additional Information (Details) Sheet http://www.argenx.com/role/DisclosureCollaborationRevenueAdditionalInformationDetails Collaboration revenue - Additional Information (Details) Details 87 false false R88.htm 41701 - Disclosure - Other operating income (Details) Sheet http://www.argenx.com/role/DisclosureOtherOperatingIncomeDetails Other operating income (Details) Details http://www.argenx.com/role/DisclosureOtherOperatingIncomeTables 88 false false R89.htm 41702 - Disclosure - Other operating income - Other Incentives (Details) Sheet http://www.argenx.com/role/DisclosureOtherOperatingIncomeOtherIncentivesDetails Other operating income - Other Incentives (Details) Details 89 false false R90.htm 41801 - Disclosure - Segment reporting - Product net sales by country of sales (Details) Sheet http://www.argenx.com/role/DisclosureSegmentReportingProductNetSalesByCountryOfSalesDetails Segment reporting - Product net sales by country of sales (Details) Details 90 false false R91.htm 41802 - Disclosure - Segment reporting - Major distributor or whole sellers (Details) Sheet http://www.argenx.com/role/DisclosureSegmentReportingMajorDistributorOrWholeSellersDetails Segment reporting - Major distributor or whole sellers (Details) Details 91 false false R92.htm 41803 - Disclosure - Segment reporting (Details) Sheet http://www.argenx.com/role/DisclosureSegmentReportingDetails Segment reporting (Details) Details http://www.argenx.com/role/DisclosureSegmentReportingTables 92 false false R93.htm 41804 - Disclosure - Segment reporting - Noncurrent assets (Details) Sheet http://www.argenx.com/role/DisclosureSegmentReportingNoncurrentAssetsDetails Segment reporting - Noncurrent assets (Details) Details 93 false false R94.htm 41901 - Disclosure - Research and development expenses (Details) Sheet http://www.argenx.com/role/DisclosureResearchAndDevelopmentExpensesDetails Research and development expenses (Details) Details http://www.argenx.com/role/DisclosureResearchAndDevelopmentExpensesTables 94 false false R95.htm 42001 - Disclosure - Selling, general and administrative expenses (Details) Sheet http://www.argenx.com/role/DisclosureSellingGeneralAndAdministrativeExpensesDetails Selling, general and administrative expenses (Details) Details http://www.argenx.com/role/DisclosureSellingGeneralAndAdministrativeExpensesTables 95 false false R96.htm 42101 - Disclosure - Personnel expenses (Details) Sheet http://www.argenx.com/role/DisclosurePersonnelExpensesDetails Personnel expenses (Details) Details http://www.argenx.com/role/DisclosurePersonnelExpensesTables 96 false false R97.htm 42102 - Disclosure - Personnel expenses - FTE (Details) Sheet http://www.argenx.com/role/DisclosurePersonnelExpensesFteDetails Personnel expenses - FTE (Details) Details 97 false false R98.htm 42201 - Disclosure - Leases - Financial position relating to leases (Details) Sheet http://www.argenx.com/role/DisclosureLeasesFinancialPositionRelatingToLeasesDetails Leases - Financial position relating to leases (Details) Details 98 false false R99.htm 42202 - Disclosure - Leases - Total contractual cash flow carrying amount (Details) Sheet http://www.argenx.com/role/DisclosureLeasesTotalContractualCashFlowCarryingAmountDetails Leases - Total contractual cash flow carrying amount (Details) Details 99 false false R100.htm 42203 - Disclosure - Leases - Statement of profit or loss and other comprehensive income (Details) Sheet http://www.argenx.com/role/DisclosureLeasesStatementOfProfitOrLossAndOtherComprehensiveIncomeDetails Leases - Statement of profit or loss and other comprehensive income (Details) Details 100 false false R101.htm 42301 - Disclosure - Financial result and exchange gains(losses) (Details) Sheet http://www.argenx.com/role/DisclosureFinancialResultAndExchangeGainsLossesDetails Financial result and exchange gains(losses) (Details) Details http://www.argenx.com/role/DisclosureFinancialResultAndExchangeGainsLossesTables 101 false false R102.htm 42401 - Disclosure - Income taxes - Tax expense (Details) Sheet http://www.argenx.com/role/DisclosureIncomeTaxesTaxExpenseDetails Income taxes - Tax expense (Details) Details 102 false false R103.htm 42402 - Disclosure - Income taxes - Provision for income taxes (Details) Sheet http://www.argenx.com/role/DisclosureIncomeTaxesProvisionForIncomeTaxesDetails Income taxes - Provision for income taxes (Details) Details 103 false false R104.htm 42403 - Disclosure - Income taxes - Deferred tax assets (Details) Sheet http://www.argenx.com/role/DisclosureIncomeTaxesDeferredTaxAssetsDetails Income taxes - Deferred tax assets (Details) Details 104 false false R105.htm 42404 - Disclosure - Income taxes - Change in net deferred taxes (Details) Sheet http://www.argenx.com/role/DisclosureIncomeTaxesChangeInNetDeferredTaxesDetails Income taxes - Change in net deferred taxes (Details) Details 105 false false R106.htm 42405 - Disclosure - Income taxes - Additional information (Details) Sheet http://www.argenx.com/role/DisclosureIncomeTaxesAdditionalInformationDetails Income taxes - Additional information (Details) Details 106 false false R107.htm 42501 - Disclosure - Loss per share (Details) Sheet http://www.argenx.com/role/DisclosureLossPerShareDetails Loss per share (Details) Details http://www.argenx.com/role/DisclosureLossPerShareTables 107 false false R108.htm 42601 - Disclosure - Financial risk management (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementDetails Financial risk management (Details) Details http://www.argenx.com/role/DisclosureFinancialRiskManagementTables 108 false false R109.htm 42602 - Disclosure - Financial risk management - Fair value (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementFairValueDetails Financial risk management - Fair value (Details) Details 109 false false R110.htm 42603 - Disclosure - Financial risk management - License agreement (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementLicenseAgreementDetails Financial risk management - License agreement (Details) Details 110 false false R111.htm 42604 - Disclosure - Financial risk management - Capital risk (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementCapitalRiskDetails Financial risk management - Capital risk (Details) Details 111 false false R112.htm 42605 - Disclosure - Financial risk management - Credit risk (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementCreditRiskDetails Financial risk management - Credit risk (Details) Details 112 false false R113.htm 42606 - Disclosure - Financial risk management - Interest rate risk (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementInterestRateRiskDetails Financial risk management - Interest rate risk (Details) Details 113 false false R114.htm 42607 - Disclosure - Financial risk management - Foreign exchange risk (Details) Sheet http://www.argenx.com/role/DisclosureFinancialRiskManagementForeignExchangeRiskDetails Financial risk management - Foreign exchange risk (Details) Details 114 false false R115.htm 42701 - Disclosure - Related party transactions - Compensation (Details) Sheet http://www.argenx.com/role/DisclosureRelatedPartyTransactionsCompensationDetails Related party transactions - Compensation (Details) Details 115 false false R116.htm 42901 - Disclosure - Commitments (Details) Sheet http://www.argenx.com/role/DisclosureCommitmentsDetails Commitments (Details) Details http://www.argenx.com/role/DisclosureCommitments 116 false false R117.htm 43001 - Disclosure - Audit fees (Details) Sheet http://www.argenx.com/role/DisclosureAuditFeesDetails Audit fees (Details) Details http://www.argenx.com/role/DisclosureAuditFeesTables 117 false false R118.htm 43101 - Disclosure - Overview of consolidation scope (Details) Sheet http://www.argenx.com/role/DisclosureOverviewOfConsolidationScopeDetails Overview of consolidation scope (Details) Details http://www.argenx.com/role/DisclosureOverviewOfConsolidationScopeTables 118 false false All Reports Book All Reports [dq-60548-EntityAddressPostalZipCode-Missing] Submission type 20-F should have a non-empty value for EntityAddressPostalZipCode in the Required Context. argx-20231231x20f.htm [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 39 fact(s) appearing in ix:hidden were eligible for transformation: argx:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage, argx:IncreaseDecreaseInFinancialInstrumentDueToReasonablyPossibleDecreaseInDesignatedRiskComponent, argx:PercentageOfReasonablyPossibleIncreaseInRiskAssumption, argx:TimePeriodToChooseDifferentContractualTerms, dei:CurrentFiscalYearEndDate, dei:TradingSymbol, ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill, ifrs-full:TransfersIntoLevel3OfFairValueHierarchyAssets, ifrs-full:TransfersIntoLevel3OfFairValueHierarchyLiabilities, ifrs-full:TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyLiabilities, ifrs-full:TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets, ifrs-full:TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyLiabilities, ifrs-full:TransfersOutOfLevel3OfFairValueHierarchyAssets, ifrs-full:TransfersOutOfLevel3OfFairValueHierarchyLiabilities - argx-20231231x20f.htm 9 argx-20231231.xsd argx-20231231_cal.xml argx-20231231_def.xml argx-20231231_lab.xml argx-20231231_pre.xml argx-20231231x20f.htm argx-20231231x20f001.jpg argx-20231231x20f002.jpg argx-20231231x20f003.jpg argx-20231231x20f004.jpg argx-20231231x20f006.jpg argx-20231231x20f007.jpg argx-20231231x20f008.jpg argx-20231231x20f009.jpg argx-20231231x20f010.jpg argx-20231231x20f011.jpg argx-20231231x20f032.jpg http://xbrl.sec.gov/dei/2023 https://xbrl.ifrs.org/taxonomy/2023-03-23/ifrs-full true true