Disclosure of revenue by geographical markets Disclosure of geographical areas [text block] Items that may be reclassified to profit or loss Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] BALANCE AS AT JANUARY 1 BALANCE AS AT CLOSING DATE Contract liabilities Statistical Measurement [Domain] Statistical Measurement [Domain] Warrant exercise ratio Warrant Exercise Ratio Warrant Exercise Ratio Increase (decrease) in revenue Increase (Decrease) In Revenue Increase (Decrease) In Revenue Changes in non-current operating assets and liabilities Changes in non-current operating assets and liabilities Increase (Decrease) In Non-Current Operating Assets And Liabilities The element represents changes in noncurrent operating assets and liabilities. Write-off / impairment fixed assets/intangibles Adjustments For Impairment Loss (Reversal Of Impairment Loss) Recognised In Profit Or Loss, Fixed Assets And Intangible Assets Adjustments For Impairment Loss (Reversal Of Impairment Loss) Recognised In Profit Or Loss, Fixed Assets And Intangible Assets Increase (decrease) in consulting and other purchased services Increase (Decrease) In Consulting And Other Purchased Services Increase (Decrease) In Consulting And Other Purchased Services Purchases of property, plant and equipment Purchase of property, plant and equipment, classified as investing activities Taxes, duties, fees, charges, other than income tax Tax expense other than income tax expense Valneva France SAS Valneva France SAS [Member] Valneva France SAS Interest expense on loans Interest Expense On Loans The element represents interest expense on loans. Other financial income Other finance income OPERATING EXPENSES Operating expense Operating expense Income appropriation Increase (decrease) through appropriation of retained earnings, equity Classes of share capital [axis] Classes of share capital [axis] Supply, office and IT costs Supply, Office And IT Costs Supply, Office And IT Costs Share-based compensation exercises (in shares) Number of share options exercised in share-based payment arrangement Valneva Scotland Ltd. Valneva Scotland Ltd [Member] Valneva Scotland Ltd Cash and cash equivalents [abstract] CURRENT Current Borrowings [Abstract] The element represents current borrowings. TOTAL EQUITY Equity, beginning balance Equity, ending balance Equity Sales channels [domain] Sales channels [domain] Cash used in operations Cash flows from (used in) operations Property, plant and equipment Property, plant and equipment FINANCE INCOME/(EXPENSES), NET Finance income (cost) Disclosure of detailed information about borrowings [table] Disclosure of detailed information about borrowings [table] Value of services Share-based compensation expense Increase (Decrease) Through Share-Based Payment Transactions, Value Of Services, Equity Increase (Decrease) Through Share-Based Payment Transactions, Value Of Services, Equity Equity issuance, subscription price per share (per euro per share) Equity Issuance, Subscription Price Per Share Equity Issuance, Subscription Price Per Share Licence agreement with Serum Institute of India (SII) [Member] Licence Agreement With Serum Institute of India (SII) [Member] Licence Agreement With Serum Institute of India (SII) Statement of comprehensive income [abstract] Statement of changes in equity [line items] Statement of changes in equity [line items] Other current liabilities Other current liabilities Types of contracts [domain] Types of contracts [domain] Items that will not be reclassified to profit or loss Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] Grant income Income from government grants Profit/(Loss) for the period Retained earnings, profit (loss) for reporting period Undrawn borrowing facilities Undrawn borrowing facilities Trade and other receivables Adjustments for decrease (increase) in trade accounts receivable Disclosure of non-adjusting events after reporting period [abstract] Disclosure of non-adjusting events after reporting period [abstract] Onerous contracts provision Onerous contracts provision [member] Less non-current portion Trade and other non-current payables Rest of World Rest Of World [Member] Rest Of World Increase (decrease) in depreciation, amortisation and impairment Increase (Decrease) In Depreciation, Amortisation And Impairment Increase (Decrease) In Depreciation, Amortisation And Impairment Statement of financial position [abstract] Contract liabilities Adjustments for increase (decrease) in contract liabilities Gain/(loss) from revaluation of lease agreements Profit (Loss) From Revaluation Of Lease Agreements The element represents revaluation of lease agreements. Other income and expenses, net OTHER INCOME AND EXPENSES, NET Other operating income (expense) Cover [Abstract] Share premium per share (in euro per share) Share Premium Per Share Share Premium Per Share Maximum Maximum [Member] Refund liabilities Disclosure Of Refund Liabilities [Text Block] The element represents disclosure of refund liabilities. Strategic partnership agreement Strategic Partnership Agreement [Member] Strategic Partnership Agreement CHANGES IN NON-CURRENT OPERATING ASSETS AND LIABILITIES (EXCLUDING THE EFFECTS OF ACQUISITION AND CONSOLIDATION): Changes In Non-Current Operating Assets And Liabilities (Excluding The Effects Of Acquisition And Exchange Rate Differences On Consolidation) [Abstract] The element represents changes in assets and liabilities that affect operating cash flows abstract. Increase (decrease) in employee benefit expense other than share-based compensation Increase (Decrease) In Employee Benefit Expense Other Than Share-Based Compensation Increase (Decrease) In Employee Benefit Expense Other Than Share-Based Compensation Adjustments to reconcile profit/(loss) for the period to cash generated from/(used in) operations Adjustments to reconcile profit/(loss) for the period to cash generated from/(used in) operations Other adjustments for non-cash items Disclosure Of Inventories [Line Items] Disclosure Of Inventories [Line Items] Disclosure Of Inventories [Line Items] Employee benefit expense other than share-based compensation Employee Benefit Expense Other Than Share-Based Compensation Employee Benefit Expense Other Than Share-Based Compensation Current liabilities Current liabilities Summary Of Significant Accounting Policies Summary Of Significant Accounting Policies Summary Of Significant Accounting Policies Impairment testing Disclosure of impairment loss and reversal of impairment loss [text block] Trade and other receivables [abstract] VBC 3 Errichtungs GmbH VBC 3 Errichtungs GmbH [Member] VBC 3 Errichtungs GmbH Marketing and distribution expenses Marketing And Distribution Expenses Sales And Marketing Expense Expenses by nature [abstract] Other revenue reserves Other Revenue Reserve [Member] Other Revenue Reserve Inventories INVENTORIES Current inventories Deferred tax assets Deferred tax assets Share premium Share premium Proceeds/(payments) from issuance of common stock, net of costs of equity transactions Proceeds (Repayments) From The Issuance Of Common Shares, Net Of Equity Transaction Costs Proceeds (Repayments) From The Issuance Of Common Shares, Net Of Equity Transaction Costs CASH FLOWS FROM FINANCING ACTIVITIES Cash flows from (used in) financing activities [abstract] Contract liabilities [abstract] Contract liabilities [abstract] Return provision and rebates Return Provision And Rebates [Member] Return Provision And Rebates Interest expense Adjustments for interest expense Total comprehensive income/(loss) Comprehensive income BALANCE AS AT JANUARY 1 BALANCE AS AT CLOSING DATE Refunds provision Refunds provision Work in progress Work In Progress, Write-Down Provision Work In Progress, Write-Down Provision Statement of changes in equity [abstract] Work in progress Current work in progress Basis of preparation Disclosure of basis of preparation of financial statements [text block] Document Fiscal Period Focus Document Fiscal Period Focus Cash at bank Balances with banks Borrowings, percentage of receivables Borrowings, Granted, Percentage Of Receivables Borrowings, Granted, Percentage Of Receivables TOTAL ASSETS Assets Assets Warrants granted (in shares) Number of other equity instruments granted in share-based payment arrangement IXIARO/ JESPECT IXIARO/ JESPECT [Member] IXIARO/ JESPECT Subsidiaries [axis] Subsidiaries [axis] Geographical [Domain] Geographical [Domain] REVENUES REVENUE TOTAL Revenue Miscellaneous income/(expenses), net Miscellaneous Income/(Expenses), Net The element represents miscellaneous income expenses. Segment information Description of accounting policy for segment reporting [text block] DUKORAL® DUKORAL [Member] DUKORAL Borrowings Disclosure of borrowings [text block] Assets classified as held for sale Non-current assets or disposal groups classified as held for sale or as held for distribution to owners Share capital Issued capital [member] Raw materials and work in progress, write-down provision Raw Materials And Work In Progress, Write-Down Provision Raw Materials And Work In Progress, Write-Down Provision Geographical areas [axis] Geographical areas [axis] Other non-current liabilities Other non-current liabilities Classes of other provisions [domain] Classes of other provisions [domain] Increase (decrease) in share-based compensation expense Increase (Decrease) In Expense From Share-Based Payment Transactions With Employees Increase (Decrease) In Expense From Share-Based Payment Transactions With Employees Number of travel vaccines Number Of Travel Vaccines Number Of Travel Vaccines Disclosure of other income (expenses) Disclosure Of Composition Of Other Income (Expenses), Net [Table Text Block] The element represents disclosure of other income table text block. Other reserves Other reserves [member] Increase (decrease) in revenue through foreign exchange differences Increase (Decrease) In Revenue From Sale Of Goods Through Foreign Exchange Differences Increase (Decrease) In Revenue From Sale Of Goods Through Foreign Exchange Differences Lease liabilities Non-current lease liabilities Share-based compensation expense: Share-Based Compensation Arrangements [Abstract] Share-Based Compensation Arrangements Capital Increase (in shares) Increase (decrease) in number of ordinary shares issued Assets classified as held for sale Disclosure of non-current assets or disposal groups classified as held for sale [text block] Intangible assets Intangible assets other than goodwill General information Disclosure of general information about financial statements [text block] Other comprehensive income Accumulated other comprehensive income [member] Disclosure Of Inventories [Table] Disclosure Of Inventories [Table] Disclosure Of Inventories [Table] Milestone payment - licenses Milestone Payment - Licenses [Member] Milestone Payment - Licenses Cash and cash equivalents CASH AND CASH EQUIVALENTS Cash and cash equivalents License fees and royalties License Fees And Royalties License Fees And Royalties Reserve offering, amount Reserve Offering, Amount Reserve Offering, Amount ASSETS Assets [abstract] Right-of-use assets Right-of-use assets [member] Schedule of borrowings by denominated currency Schedule Of Borrowings By Denominated Currency [Table Text Block] The element represents borrowings are denominated table text block. TOTAL EQUITY AND LIABILITIES Equity and liabilities United States UNITED STATES Retained earnings/(Accumulated deficit) Retained earnings, excluding profit (loss) for reporting period Disclosure of development of contract liabilities Explanation of significant changes in contract assets and contract liabilities [text block] VLA2001 Covid VLA2001 Product, Netting [Member] Covid VLA2001 Product, Netting Disclosure of reserves within equity [table] Disclosure of reserves within equity [table] General and administrative expenses General and administrative expense Contract liabilities Description of accounting policy for recognition of revenue [text block] Raw materials and consumables used Raw materials and consumables used Payments for share issue costs Payments for share issue costs Disclosure of attribution of expenses by nature to their function [table] Disclosure of attribution of expenses by nature to their function [table] Disclosure Of General Information [Line Items] Disclosure Of General Information [Line Items] Disclosure Of General Information [Line Items] Schedule of maturity analysis of non-current borrowings Disclosure of maturity analysis for non-derivative financial liabilities [text block] Interest paid Interest paid, classified as financing activities Disclosure of impairment loss and reversal of impairment loss [table] Disclosure of impairment loss and reversal of impairment loss [table] Foreign exchange loss Foreign exchange loss Increase (decrease) in revenue from sales of goods, percentage Increase (Decrease) In Revenue From Sales Of Goods, Percentage Increase (Decrease) In Revenue From Sales Of Goods, Percentage IXIARO® IXIARO [Member] IXIARO [member] Borrowings denominated in USD United States of America, Dollars Other revenues from contracts with customers OTHER REVENUES FROM CONTRACTS WITH CUSTOMERS Other Revenue From Contract With Customers Other Revenue From Contract With Customers Disclosure of impairment loss and reversal of impairment loss [line items] Disclosure of impairment loss and reversal of impairment loss [line items] Depreciation and amortization and impairment Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss Capital from Share-based compensation Reserve of share-based payments [member] Related party transactions [abstract] Related party transactions [abstract] Increase (decrease) in other operating income (expense), percentage Increase (Decrease) In Other Operating Income (Expense), Percentage Increase (Decrease) In Other Operating Income (Expense), Percentage Over 5 years Later than five years [member] CASH FLOWS FROM INVESTING ACTIVITIES Cash flows from (used in) investing activities [abstract] Related-party transactions Disclosure of related party [text block] Refund Liabilities [Abstract] Refund Liabilities [Abstract] Refund Liabilities Disclosure of detailed information about finance income (cost) Disclosure Of Detailed Information About Finance Income (Cost) Explanatory [Table Text Block] Disclosure Of Detailed Information About Finance Income (Cost) Explanatory Shelf-life period Shelf-Life Period Shelf-Life Period Cash and cash equivalents Description of accounting policy for determining components of cash and cash equivalents [text block] Other regulated reserves Other Regulated Reserves [Member] The element represents other regulated reserves member. Other releases Other Releases, Refund Liability The element represents other releases refund liability. Interest expenses on lease liabilities Interest expense on lease liabilities Critical accounting judgements and key sources of estimation uncertainty Disclosure of accounting judgements and estimates [text block] TOTAL Trade and other payables Exercises Increase (decrease) through share-based payment transactions, equity Disclosure of classes of share capital [table] Disclosure of classes of share capital [table] Non-current assets Non-current assets Currency translation differences Other comprehensive income, net of tax, exchange differences on translation of foreign operations Borrowings and other loans Debentures And Other Loans, Non-Current Debentures And Other Loans, Non-Current Cost of equity transaction, net of tax Share issue related cost Increase (decrease) in cost of services and change in inventory Increase (Decrease) In Cost Of Services And Change In Inventory Increase (Decrease) In Cost Of Services And Change In Inventory Other income/(expenses), net Disclosure of other operating income (expense) [text block] Foreign exchange gain/(loss), net FOREIGN EXCHANGE GAIN/(LOSSES), NET Foreign exchange gain (loss) Disclosure of disaggregation of revenue from contracts with customers [line items] Disclosure of disaggregation of revenue from contracts with customers [line items] Proceeds from exercise of warrants Proceeds from exercise of warrants Other services Others Products [Member] The element represents others member. Impairment testing Description of accounting policy for impairment of assets [text block] Finance Income (Expense) [Abstract] Finance Income (Expense) Trade receivables Disclosure of trade and other receivables [text block] Refund liabilities Adjustments For Increase (Decrease) In Refund Liabilities Adjustments For Increase (Decrease) In Refund Liabilities Borrowings denominated in EUR Euro Member Countries, Euro Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] CHANGES IN WORKING CAPITAL (EXCLUDING THE EFFECTS OF ACQUISITION AND EXCHANGE RATE DIFFERENCES ON CONSOLIDATION): Changes In Working Capital (Excluding The Effects Of Acquisition And Exchange Rate Differences On Consolidation) [Abstract] The element represents changes in working capital excluding effects of acquisition and exchange rate differences on consolidation. Exchange gains/(losses) on cash Effect of exchange rate changes on cash and cash equivalents Interest received Interest received, classified as investing activities Warehousing and distribution costs Warehousing And Distribution Costs Warehousing And Distribution Costs NET CASH GENERATED FROM/(USED IN) OPERATING ACTIVITIES Cash flows from (used in) operating activities Payments for debt issue costs Payments for debt issue costs Finished goods Current finished goods Summary of all subsidiaries held by the company directly or indirectly Disclosure of interests in other entities [text block] Increase (decrease) in research and development tax credit Increase (Decrease) In Research And Development Tax Credit Increase (Decrease) In Research And Development Tax Credit Less non-current portion Non-current contract liabilities Warrant reserve Warrant reserve [member] Number of milestones not expected to be met Number Of Milestones Not Expected To Be Met Number Of Milestones Not Expected To Be Met Geographical areas [domain] Geographical areas [domain] Disclosure of disaggregated revenue by type of goods or services Schedule Of Disaggregated Revenue By Type Of Goods Or Services [Table Text Block] Schedule Of Disaggregated Revenue By Type Of Goods Or Services Revenues Disclosure of revenue [text block] Document Fiscal Year Focus Document Fiscal Year Focus Trade receivables Trade and other current receivables Adjustments to reconcile profit/(loss) for the period to cash generated from/(used in) operations: Adjustments to reconcile profit (loss) [abstract] Other interest expense Other Interest Expense The element represents other interest expense. Direct product sales Goods sold directly to consumers [member] Disclosure of attribution of expenses by nature to their function [line items] Disclosure of attribution of expenses by nature to their function [line items] Provision for employer contribution costs on share-based compensation plans Adjustments For Employer Contribution Costs On Share-Based Compensation Plans Adjustments For Employer Contribution Costs On Share-Based Compensation Plans Finance expenses TOTAL FINANCE EXPENSES Finance costs Indirect product sales Goods sold through intermediaries [member] Classes of other provisions [axis] Classes of other provisions [axis] Summary of significant accounting policies Disclosure of material accounting policy information [text block] Leasehold improvements Leasehold improvements [member] Impact of new, revised or amended Standards and Interpretations Disclosure of expected impact of initial application of new standards or interpretations [text block] Expected volatility Expected Volatility, Other Equity Instruments Granted Expected Volatility, Other Equity Instruments Granted Revenue recognition Revenue Recognition, Refund Liability Revenue Recognition, Refund Liability Borrowing and other loans Debentures And Other Loans, Current The element represents other loans current borrowings. Foreign exchange gain Foreign exchange gain Valneva Canada Inc. Valneva Canada Inc [Member] Valneva Canada Inc Key management personnel compensation Key management personnel compensation Entity Central Index Key Entity Central Index Key Cash and cash equivalents Disclosure of cash and cash equivalents [text block] Classes of current inventories [abstract] Increase (decrease) in advertising expenses Increase (Decrease) In Advertising Expenses Increase (Decrease) In Advertising Expenses Ordinary shares Ordinary shares [member] Potential proceeds from exercise of warrants Potential Proceeds From Exercise Of Warrants Potential Proceeds From Exercise Of Warrants Other non-IFRS 15 revenue Other Revenue Not From Contracts With Customers Amount of revenue other than revenue from contracts with customers. Revenue recognition Revenue recognition Revenue Recognition, Contract Liabilities The element represents revenue recognition contract liabilities. Cost Gross carrying amount [member] Trade payables and accruals CURRENT PORTION Trade and other current payables Disclosure of products sales by channel Disclosure Of Products Sales By Channel [Table Text Block] Disclosure Of Products Sales By Channel Inventories Disclosure of inventories [text block] BPI France BPI France [Member] BPI France Theoretical fair value per share (in euro per share) Fair Value Per Share Fair Value Per Share Proceeds from issuing shares Proceeds from issuing shares Travel and transportation costs Travel And Transportation Expenses Travel And Transportation Expenses Royalties received Royalties Received [Member] Royalties Received Disclosure of development of refund liabilities Disclosure Of Development Of Refund Liabilities [Table Text Block] The element represents disclosure of present value of refund liability explanatory. Income tax liability Current tax liabilities Schedule of income statement items by nature of cost Schedule Of Income Statement Items By Nature Of Cost [Table Text Block] The element represents schedule of expenses by nature table text block. IXCHIQ IXCHIQ [Member] IXCHIQ Cash and cash equivalents at beginning of the year CASH AND CASH EQUIVALENTS AT END OF THE PERIOD Cash And Cash Equivalents Excluding Restricted Cash Amount of cash and cash equivalents excluding restricted cash. OPERATING PROFIT/(LOSS) Profit (loss) from operating activities Proceeds of issue Gross Proceeds From Borrowings, Classified As Financing Activities Gross Proceeds From Borrowings, Classified As Financing Activities IXIARO, IXCHIQ and DUKORAL IXIARO, IXCHIQ And DUKORAL [Member] IXIARO, IXCHIQ And DUKORAL Raw materials, write-down provision Raw materials Raw Materials, Write-Down Provision Raw Materials, Write-Down Provision Borrowings NON-CURRENT BORROWINGS Less: non-current portion Non-current portion of non-current borrowings Inventory Adjustments for decrease (increase) in inventories Trade receivables past due Trade Receivables Past Due Trade Receivables Past Due Interest paid on lease liabilities Interest Paid On Lease Liability, Classified As Financing Activities Interest Paid On The Lease Liabilities, Classified As Financing Activities Proceeds from borrowings Proceeds from borrowings, classified as financing activities Payment of lease liabilities Payments of lease liabilities, classified as financing activities R&D costs Research And Development Costs [Member] Research And Development Costs Confidence interval level, percentage Confidence Interval Level, Percentage Confidence Interval Level, Percentage Product sales PRODUCT SALES TOTAL PRODUCT SALES Revenue from sale of goods Proceeds from borrowings, net of transaction costs Proceeds From Borrowings, Net Of Transaction Cost Proceeds From Borrowings, Net Of Transaction Cost Proportion of ownership interest in subsidiary Proportion of ownership interest in subsidiary Revenues from shipping and handling Revenues From Shipping And Handling [Member] Revenues From Shipping And Handling Disclosure of impairment loss and reversal of impairment loss [abstract] Schedule of composition of borrowings Schedule Of Composition Of Borrowings [Table Text Block] The element represents disclosure of borrowings information explanatory. IXCHIQ® IXCHIQ Chikungunya VLA1553 [Member] IXCHIQ Chikungunya VLA1553 Entity Registrant Name Entity Registrant Name Raw materials Current raw materials Basic earnings/(losses) per share for profit/(loss) for the period attributable to the equity holders of the Company (in euro per share) Basic earnings (loss) per share Valneva Sweden AB Valneva Sweden AB [Member] Valneva Sweden AB Schedule of write-down provisions related to the inventory categories Schedule Of Write-Down Provisions Related To The Inventory Categories [Table Text Block] The element represents disclosure of write-down provisions table text block. Provisions Disclosure of provisions [text block] Statement of cash flows [abstract] Schedule of reconciliation of loan Schedule Of Reconciliation Of Loan [Table Text Block] The element represents loan table text block. Disclosure Of General Information And Significant Events Of The Period [Table] Disclosure Of General Information [Table] Disclosure Of General Information [Table] Schedule of new and amended standards adopted by the Group Schedule Of New And Amended Standards Adopted By The Group [Table Text Block] The element represents schedule of new international financial reporting standards not yet adopted disclosure table text block. Share-based compensation expense Adjustments for share-based payments Schedule of disaggregated revenue Schedule Of Disaggregated Revenue Information [Table Text Block] Schedule Of Disaggregated Revenue Information Other non-current assets Adjustments For Decrease (Increase) In Other Non-Current Assets Adjustments For Decrease (Increase) In Other Non-Current Assets Germany GERMANY Refund liabilities Non-Current Refund Liabilities The element represents refund liabilities non current. Research and development tax credit Research And Development Tax Credit The element represents research and development tax. Contract assets Contract assets [member] BRAZIL BRAZIL Warrants Warrants [member] Cash Flow Information [Abstract] Cash Flow Information All Currencies [Domain] All Currencies [Domain] EQUITY Equity [abstract] Other expenses Other expenses, by nature Disclosure of disaggregation of revenue from contracts with customers [table] Disclosure of disaggregation of revenue from contracts with customers [table] Contract liabilities Disclosure Of Contracts Liabilities [Text Block] Disclosure Of Contracts Liabilities Disclosure of operating segments [abstract] Disclosure of operating segments [abstract] Disclosure of transactions between related parties [line items] Disclosure of transactions between related parties [line items] OTHER COMPREHENSIVE INCOME/(LOSS) Other comprehensive income [abstract] Canada CANADA Interest expense on refund liabilities Interest Expense On Refund Liabilities Interest Expense On Refund Liabilities Classes of share capital [domain] Classes of share capital [domain] Manufacturing equipment Manufacturing Equipment [Member] Manufacturing Equipment Trade and other payables and provisions Adjustments For Increase (Decrease) In Other Payables And Provisions Adjustments For Increase (Decrease) In Other Payables And Provisions Sales channels [axis] Sales channels [axis] Finance income TOTAL FINANCE INCOME Finance income Austria AUSTRIA Exercise price per share (per euro per share) Exercise Price Per Share Exercise Price Per Share Disclosure of other provisions [line items] Disclosure of other provisions [line items] Schedule of other provisions Disclosure of other provisions [text block] Interest income Adjustments for interest income Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table] Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table] Other non-cash (income)/expense Other Adjustments For Non-Cash Income (Expense) Other Adjustments For Non-Cash Income (Expense) Types of contracts [axis] Types of contracts [axis] Share premium Share premium [member] Provisions Non-current provisions TOTAL COMPREHENSIVE INCOME/(LOSS) FOR THE PERIOD Comprehensive income, attributable to owners of parent Minimum Minimum [Member] Trade receivables Description of accounting policy for trade and other receivables [text block] TOTAL LIABILITIES Liabilities Less non-current portion Non-current refunds provision Non-current refunds provision Share capital Issued capital Purchased goods (third party products) Current Purchased Goods The element represents inventories purchased goods. Disclosure of subsidiaries [table] Disclosure of subsidiaries [table] Addition Additions, Contract Liabilities The element represents addition contract liabilities. Number of shares outstanding, beginning balance (in shares) Number of shares outstanding, ending balance (in shares) Number of shares outstanding Third party products Third Party Products [Member] The element represents third party products member. PROVISIONS Provisions Other provisions Products and services [axis] Products and services [axis] Disclosure of reserves within equity [line items] Disclosure of reserves within equity [line items] Income tax benefit/(expense) Tax expense (income) Cash flow information Disclosure of cash flow statement [text block] Events after the reporting period Disclosure of events after reporting period [text block] Number of employees Number of employees Schedule of inventories Schedule Of Inventories [Table Text Block] The element represents disclosure of inventories table text block. CASH FLOWS FROM OPERATING ACTIVITIES Cash flows from (used in) operating activities [abstract] Nordics Nordics [Member] Nordics Refund liabilities Description Of Accounting Policy For Refund Liabilities [Policy Text Block] Description Of Accounting Policy For Refund Liabilities Document Period End Date Document Period End Date Borrowings, effective interest rate Borrowings, Effective Interest Rate Borrowings, Effective Interest Rate Refund liabilities Current Refund Liabilities The element represents refund liabilities current. Disclosure of classes of share capital [line items] Disclosure of classes of share capital [line items] Finished goods, write-down provision Finished goods Finished Goods, Write-Down Provision Finished Goods, Write-Down Provision GROSS AMOUNT OF INVENTORIES BEFORE WRITE-DOWN Gross Amount Of Inventories Before Write-Down The element represents inventories gross amount of inventory before write-down. Maturity [axis] Maturity [axis] United Kingdom UNITED KINGDOM Classes of financial instruments [axis] Classes of financial instruments [axis] Research and development expenses Research and development expense Weighted average share price (in euro per share) Weighted average share price Scenario [Axis] Scenario [Axis] Other non-current assets Other non-current assets Legal proceedings provision Legal proceedings provision [member] Defined benefit plan actuarial gains/(losses) Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans Document Type Document Type Share-based compensation expense Expense from share-based payment transactions with employees CURRENT PORTION Current refunds provision Current refunds provision Inventories Description of accounting policy for measuring inventories [text block] Profit or loss [abstract] Contract liabilities CURRENT PORTION Current contract liabilities Statistical Measurement [Axis] Statistical Measurement [Axis] Vaccine efficacy rate Vaccine Efficacy Rate Vaccine Efficacy Rate Decrease in trade receivables Increase (Decrease) In Trade Receivables Increase (Decrease) In Trade Receivables Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Accrued interest Accrued Interest On Borrowings The element represents accrued interest. Classes of assets [axis] Classes of assets [axis] Trade payables Trade payables Provisions Current provisions Borrowings by name [domain] Borrowings by name [domain] Trade receivables Trade receivables [member] France FRANCE Number of shares to be issued on exercise of options or warrants (per share) Number Of Shares To Be Issued On Exercise Of Options Or Warrants Number Of Shares To Be Issued On Exercise Of Options Or Warrants EARNINGS/(LOSSES) PER SHARE Earnings per share [abstract] Range [axis] Range [axis] Components of equity [axis] Components of equity [axis] Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] Income tax expense/(income) Adjustments For Income Tax Expense (Income) Adjustments For Income Tax Expense (Income) Deferred tax liabilities Deferred tax liabilities Exchange rate, appreciation (depreciation) of US dollar against Euro Exchange Rate, Appreciation (Depreciation) Of US Dollar Against Euro Exchange Rate, Appreciation (Depreciation) Of US Dollar Against Euro Geographical [Axis] Geographical [Axis] Disclosure of composition of cash and cash equivalents Disclosure Of Composition Of Cash And Cash Equivalents [Table Text Block] Disclosure Of Composition Of Cash And Cash Equivalents PROFIT/(LOSS) BEFORE INCOME TAX Profit (loss) before tax Income tax paid Income taxes paid (refund), classified as operating activities Other comprehensive income/(loss) for the period, net of tax Other comprehensive income Counterparties [domain] Counterparties [domain] Current Other current provisions Treasury shares Treasury shares [member] NET CHANGE IN CASH AND CASH EQUIVALENTS Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Depreciation and amortization Adjustments for depreciation and amortisation expense Transaction costs Increase (Decrease) Through Transaction Costs, Borrowings The element represents transaction costs. Equity Disclosure of share capital, reserves and other equity interest [text block] Forecast Forecast [Member] Payment of interest Interest expense on borrowings Disclosure of subsidiaries [line items] Disclosure of subsidiaries [line items] Capital Increase Issue of equity Other current assets Other current assets Purchased goods (third party products) Purchased Goods, Write-Down Provision Purchased Goods, Write-Down Provision Disclosure of disaggregation of revenue from contracts with customers [abstract] Disclosure of disaggregation of revenue from contracts with customers [abstract] Disclosure of other provisions [table] Disclosure of other provisions [table] Non-current Other non-current provisions Building and energy costs Building And Energy Costs Building And Energy Costs Less: write-down provision Inventories, write-down provision TOTAL WRITE-DOWN PROVISION Inventories, Write-Down Provision Inventories, Write-Down Provision Classes of financial instruments [domain] Classes of financial instruments [domain] Vaccines Holdings Sweden AB Vaccines Holdings Sweden AB [Member] Vaccines Holdings Sweden AB Products and services [domain] Products and services [domain] Principal repayment Repayments of borrowings, classified as financing activities Subsidiaries [domain] Subsidiaries [domain] Critical Accounting Judgements And Key Sources Of Estimation Uncertainty Critical Accounting Judgements And Key Sources Of Estimation Uncertainty Miscellaneous other provisions Miscellaneous other provisions [member] Borrowings by name [axis] Borrowings by name [axis] IXIARO, DUKORAL and IXCHIQ IXIARO, DUKORAL And IXCHIQ [Member] IXIARO, DUKORAL And IXCHIQ Trade payables and accruals Disclosure of trade and other payables [text block] Disclosure of ordinary shares and convertible preferred shares and development of outstanding shares Disclosure of classes of share capital [text block] Other reserves Other reserves, at beginning of period Other reserves, at end of period Other reserves TOTAL BORROWINGS Borrowings TOTAL BORROWINGS Borrowings, beginning period Borrowings, ending period Borrowings Cost of services and change in inventory Cost Of Services And Change In Inventory Cost Of Services And Change In Inventory Borrowings Description of accounting policy for borrowings [text block] Expenses by nature Disclosure of expenses by nature [text block] Accumulated impairment Loss allowance Accumulated impairment [member] Valneva USA, Inc. Valneva USA Inc [Member] Valneva USA Inc Profit/(loss) for the period Retained earnings, profit (loss) for reporting period [member] Number of adults vaccinated Number Of Adults Vaccinated Number Of Adults Vaccinated Tax and Employee-related liabilities Current Tax And Employee-Related Liabilities The amount of tax and employee related liabilities. Schedule of other reserves Disclosure of reserves within equity [text block] Borrowings, interest rate Borrowings, interest rate NET CASH GENERATED FROM/(USED IN) INVESTING ACTIVITIES Cash flows from (used in) investing activities FINANCE INCOME Finance Income [Abstract] The element represents finance income abstract. General Information And Significant Events Of Period General Information And Significant Events Of Period General Information And Significant Events Of Period Amended collaboration and license agreement Amended Collaboration And License Agreement [Member] Amended Collaboration And License Agreement Additions Additions, refund liability Additions, Refund Liability The element represents additions refund liability. Pharmakon loan due 2030 and amended Debt financing agreement due 2028 Pharmakon Loan Due 2030 And Amended Debt Financing Agreement Due 2028 [Member] Pharmakon Loan Due 2030 And Amended Debt Financing Agreement Due 2028 NET CASH GENERATED FROM FROM/(USED IN) FINANCING ACTIVITIES Cash flows from (used in) financing activities Coalition for Epidemic Preparedness Innovations (CEPI) Coalition For Epidemic Preparedness Innovations (CEPI) [Member] Coalition For Epidemic Preparedness Innovations (CEPI) Increase (decrease) in revenue from sale of goods Increase (Decrease) In Revenue From Sale Of Goods Increase (Decrease) In Revenue From Sale Of Goods Schedule of trade and other payables Schedule Of Trade And Other Payables [Table Text Block] The element represents disclosure of trade and other payables table text block. Counterparties [axis] Counterparties [axis] Gain/(loss) on disposal of fixed assets and intangible assets, net Gains (losses) on disposals of non-current assets (Gain)/loss from MMF investments Adjustment For Gain/(Loss) from MMF investments Adjustment For Gain/(Loss) from MMF investments Number of share warrant for entity share (per share) Number Of Share Warrant for Entity Share Number Of Share Warrant for Entity Share NON-CURRENT Non-Current Borrowings [Abstract] The element represents noncurrent borrowings abstract. Changes in working capital Changes in working capital Increase (decrease) in working capital Current assets Current assets Valneva UK Ltd. Valneva UK Ltd [Member] Valneva UK Ltd Between 1 and 3 years Later than one year and not later than three years [member] Statement of changes in equity [table] Statement of changes in equity [table] Schedule of adjustments to reconcile net loss to net cash generated from operations Schedule Of Adjustments To Reconcile Net Loss To Net Cash Generated From Operations [Table Text Block] The element represents disclosure of detailed information about in supplemental information on statement of cash flows explanatory. Retained earnings/ (Accumulated deficit) Retained earnings, excluding profit (loss) for reporting period [member] Exchange rate difference Increase (Decrease) Through Exchange Rate Difference, Borrowings The element represents exchange rate difference. Internal development costs Internal Development Costs [Member] Internal Development Costs Borrowings Current borrowings CURRENT PORTION Current borrowings and current portion of non-current borrowings Cost of goods and services Cost of sales Classes of assets [domain] Classes of assets [domain] Current Fiscal Year End Date Current Fiscal Year End Date Trade and other payables [abstract] Proceeds from sale of property, plant and equipment Proceeds from sales of property, plant and equipment, classified as investing activities ABSA ABSA [Member] ABSA Disclosure of transactions between related parties [table] Disclosure of transactions between related parties [table] Accrued expenses Accruals Receivables from contracts with customers Receivables from contracts with customers Exchange rate differences Exchange Rate Differences, Contract Liabilities The element represents exchange rate differences contract liabilities. Disclosure of detailed information about borrowings [line items] Disclosure of detailed information about borrowings [line items] Realized gains from cash and cash equivalents Realized Gains From Cash And Cash Equivalents Realized Gains From Cash And Cash Equivalents Advertising costs Advertising expense Pfizer Inc. Pfizer Inc [Member] The element represents pfizer inc member. Between 3 and 5 years Later than three years and not later than five years [member] Par value per share (in euro per share) Par value per share PROFIT/(LOSS) FOR THE PERIOD PROFIT/(LOSS) FOR THE PERIOD Profit/(Loss) for the period PROFIT/(LOSS) FOR THE PERIOD Profit (loss) Other revenues Other revenue Lyme VLA15 Lyme VLA15 [Member] The element represents lyme v l a15 member. Financial assets Financial assets Pharmakon loan agreement due 2030 Pharmakon Loan Agreement Due 2030 [Member] Pharmakon Loan Agreement Due 2030 Amendment Flag Amendment Flag Components of equity [domain] Components of equity [domain] Non-current liabilities Non-current liabilities Increase (decrease) in other operating income (expense) Increase (Decrease) In Other Operating Income (Expense) Increase (Decrease) In Other Operating Income (Expense) Number of shares issued (in shares) Number of shares issued Analytical support and drug substance Analytical Support And Drug Substance [Member] Analytical Support And Drug Substance Segment information Disclosure of entity's operating segments [text block] Consulting and other purchased services Consulting And Other Purchased Services The element represents consulting and other purchased services expenses. Borrowing facilities, maximum borrowing capacity Borrowing Facilities, Maximum Borrowing Capacity Borrowing Facilities, Maximum Borrowing Capacity Reduction in global workforce, percentage Reduction In Global Workforce, Percentage Reduction In Global Workforce, Percentage Exercise price premium, percentage Exercise Price Premium, Percentage Exercise Price Premium, Percentage Range [domain] Range [domain] Borrowings [abstract] Finance income/(expenses), net Disclosure of finance income (cost) [text block] Interest income from other parties Interest income Scenario [Domain] Scenario [Domain] Analysis of income and expense [abstract] GSK GSK [Member] GSK Long term refund liabilities Adjustments For Increase (Decrease) In Long-Term Refund Liabilities Adjustments for decrease (increase) in long term refund liabilities. LIABILITIES Liabilities [abstract] CIR Research Tax Credit [Member] Research Tax Credit Capital increase with share warrant Increase (decrease) through exercise of warrants, equity Provisions [abstract] Provisions [abstract] Carrying amount [member] Carrying amount [member] Valneva Austria GmbH Valneva Austria GmbH [Member] Valneva Austria GmbH Additional provisions, other provisions Additional provisions, other provisions Other Europe Other Europe [Member] Other Europe Other non-current liabilities and provisions Adjustments For Increase (Decrease) In Other Non-Current Liabilities And Provisions Adjustments for decrease (increase) in other noncurrent liabilities and provisions. FINANCE EXPENSES Finance Expenses [Abstract] Finance Expenses Lease liabilities Current lease liabilities CEPI CEPI [Member] CEPI Currency [Axis] Currency [Axis] Diluted earnings/(losses) per share for profit/(loss) for the period attributable to the equity holders of the Company (in euro per share) Diluted earnings (loss) per share Supply agreement Supply Agreement [Member] Supply Agreement Maturity [domain] Maturity [domain] Right of use assets Right-of-use assets Borrowings, transaction costs Borrowings, Transaction Costs Borrowings, Transaction Costs Disclosure of detailed information about trade receivables Disclosure Of Detailed Information About Trade Receivables [Table Text Block] Disclosure Of Detailed Information About Trade Receivables Exchange rate difference Exchange Rate Difference, Refund Liability The element represents exchange rate difference refund liability. Number of commercial vaccines Number Of Commercial Vaccines Number Of Commercial Vaccines Proceeds from sale and purchase of MMF investments Proceeds From Sale And Purchase Of MMF Investments Proceeds From Sale And Purchase Of MMF Investments Interest expense capitalized Interest Expense Capitalized, Refund Liability The element represents interest expense capitalized refund liability. Purchases of intangible assets Purchase of intangible assets, classified as investing activities (Profit)/loss from disposal of property, plant, equipment and intangible assets Adjustments For Gain (Loss) On Disposals Of Property Plant And Equipment And Intangible Assets Adjustments For Gain (Loss) On Disposals Of Property Plant And Equipment And Intangible Assets