75000 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Consolidated Statement of Profit and Loss of Immatics N.V. link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Consolidated Statement of Comprehensive Income/(Loss) of Immatics N.V. link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - Consolidated Statement of Financial Position of Immatics N.V. link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - Consolidated Statement of Cash Flows of Immatics N.V. link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - Consolidated Statement of Changes in Shareholders' equity (deficit) of Immatics N.V. link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Cybersecurity Risk Management, Strategy and Governance link:presentationLink link:calculationLink link:definitionLink 995457 - Disclosure - Group information link:presentationLink link:calculationLink link:definitionLink 995467 - Disclosure - Basis of presentation link:presentationLink link:calculationLink link:definitionLink 995477 - Disclosure - Application of new and revised international financial reporting standards link:presentationLink link:calculationLink link:definitionLink 995487 - Disclosure - Summary of material accounting policies applied by the Group for the annual reporting period ending December 31, 2024 link:presentationLink link:calculationLink link:definitionLink 995497 - Disclosure - Significant accounting judgments, estimates and assumptions link:presentationLink link:calculationLink link:definitionLink 995507 - Disclosure - Revenue from collaboration agreements link:presentationLink link:calculationLink link:definitionLink 995517 - Disclosure - Other Income link:presentationLink link:calculationLink link:definitionLink 995527 - Disclosure - Financial result link:presentationLink link:calculationLink link:definitionLink 995537 - Disclosure - Personnel expenses link:presentationLink link:calculationLink link:definitionLink 995547 - Disclosure - Income Tax link:presentationLink link:calculationLink link:definitionLink 995557 - Disclosure - Share-based payments link:presentationLink link:calculationLink link:definitionLink 995567 - Disclosure - Accounts receivables link:presentationLink link:calculationLink link:definitionLink 995577 - Disclosure - Other current and non-current assets link:presentationLink link:calculationLink link:definitionLink 995587 - Disclosure - Property, plant and equipment link:presentationLink link:calculationLink link:definitionLink 995597 - Disclosure - Intangible assets link:presentationLink link:calculationLink link:definitionLink 995607 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 995617 - Disclosure - Accounts payable link:presentationLink link:calculationLink link:definitionLink 995627 - Disclosure - Other current liabilities link:presentationLink link:calculationLink link:definitionLink 995637 - Disclosure - Shareholders' equity link:presentationLink link:calculationLink link:definitionLink 995647 - Disclosure - Financial Risk Management Objectives and Policies link:presentationLink link:calculationLink link:definitionLink 995657 - Disclosure - Financial Instruments link:presentationLink link:calculationLink link:definitionLink 995667 - Disclosure - Commitments and contingencies link:presentationLink link:calculationLink link:definitionLink 995677 - Disclosure - Related party disclosures link:presentationLink link:calculationLink link:definitionLink 995687 - Disclosure - Earnings and Loss per Share link:presentationLink link:calculationLink link:definitionLink 995697 - Disclosure - Events occurring after the reporting period link:presentationLink link:calculationLink link:definitionLink 995707 - Disclosure - Summary of accounting policies applied by the Group for the annual reporting period ending December 31, 2024 (Policies) link:presentationLink link:calculationLink link:definitionLink 995717 - Disclosure - PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS (Tables) link:presentationLink link:calculationLink link:definitionLink 995727 - Disclosure - Basis of presentation (Tables) link:presentationLink link:calculationLink link:definitionLink 995737 - Disclosure - Application of new and revised international financial reporting standards (Tables) link:presentationLink link:calculationLink link:definitionLink 995747 - Disclosure - Revenue from collaboration agreements (Tables) link:presentationLink link:calculationLink link:definitionLink 995757 - Disclosure - Other Income (Tables) link:presentationLink link:calculationLink link:definitionLink 995767 - Disclosure - Financial result (Tables) link:presentationLink link:calculationLink link:definitionLink 995777 - Disclosure - Personnel expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 995787 - Disclosure - Income Tax (Tables) link:presentationLink link:calculationLink link:definitionLink 995797 - Disclosure - Share-based payments (Tables) link:presentationLink link:calculationLink link:definitionLink 995807 - Disclosure - Accounts receivables (Tables) link:presentationLink link:calculationLink link:definitionLink 995817 - Disclosure - Other current and non-current assets (Tables) link:presentationLink link:calculationLink link:definitionLink 995827 - Disclosure - Property, plant and equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 995837 - Disclosure - Intangible assets (Tables) link:presentationLink link:calculationLink link:definitionLink 995847 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 995857 - Disclosure - Accounts payable (Tables) link:presentationLink link:calculationLink link:definitionLink 995867 - Disclosure - Other current liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 995877 - Disclosure - Financial Risk Management Objectives and Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 995887 - Disclosure - Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 995897 - Disclosure - Commitments and contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 995907 - Disclosure - Related party disclosures (Tables) link:presentationLink link:calculationLink link:definitionLink 995917 - Disclosure - Earnings and Loss per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 995927 - Disclosure - PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS (Detail) link:presentationLink link:calculationLink link:definitionLink 995937 - Disclosure - Group information - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995947 - Disclosure - Basis of presentation - Summary of Foreign Exchange Rates (Detail) link:presentationLink link:calculationLink link:definitionLink 995957 - Disclosure - Basis of presentation - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995967 - Disclosure - Application of new and revised international financial reporting standards - Summary of Application of new amendments (Detail) link:presentationLink link:calculationLink link:definitionLink 995977 - Disclosure - Application of new and revised international financial reporting standards - Summary of Non Mandatory standards and amendments issued by IASB (Detail) link:presentationLink link:calculationLink link:definitionLink 995987 - Disclosure - Revenue from collaboration agreements - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995997 - Disclosure - Revenue from collaboration agreements - Summary of revenue from collaboration agreements (Detail) link:presentationLink link:calculationLink link:definitionLink 996007 - Disclosure - Revenue from collaboration agreements - Summary of Deferred revenue related to the collaboration agreements (Detail) link:presentationLink link:calculationLink link:definitionLink 996017 - Disclosure - Other Income - Summary of other income (Details) link:presentationLink link:calculationLink link:definitionLink 996027 - Disclosure - Other Income - Summary of other income (Details) 2 link:presentationLink link:calculationLink link:definitionLink 996037 - Disclosure - Other Income - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 996047 - Disclosure - Financial result - Summary of financial income and financial expenses (Detail) link:presentationLink link:calculationLink link:definitionLink 996057 - Disclosure - Financial result - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996067 - Disclosure - Personnel expenses - Summary of Personnel Expenses (Detail) link:presentationLink link:calculationLink link:definitionLink 996077 - Disclosure - Personnel expenses - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996087 - Disclosure - Income Tax - Summary of Current and Deferred Taxes (Detail) link:presentationLink link:calculationLink link:definitionLink 996097 - Disclosure - Income Tax - Summary of Reconciliation Between Taxes On Income And Expected Income Tax Benefit (Detail) link:presentationLink link:calculationLink link:definitionLink 996107 - Disclosure - Income Tax - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996117 - Disclosure - Income Tax - Summary of Deferred Tax Assets and Deferred Tax Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 996127 - Disclosure - Accounts receivables - Summary of Trade receivables (Detail) link:presentationLink link:calculationLink link:definitionLink 996137 - Disclosure - Accounts receivables - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996147 - Disclosure - Other current and non-current assets -Summary of Other current assets (Detail) link:presentationLink link:calculationLink link:definitionLink 996157 - Disclosure - Other current and non-current assets - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996167 - Disclosure - Other current and non-current assets - Summary of Other non-current assets (Detail) link:presentationLink link:calculationLink link:definitionLink 996177 - Disclosure - Property, plant and equipment - Summary of Changes to property, plant and equipment (Detail) link:presentationLink link:calculationLink link:definitionLink 996187 - Disclosure - Property, plant and equipment - Summary of Depreciation expense (Detail) link:presentationLink link:calculationLink link:definitionLink 996197 - Disclosure - Property, plant and equipment - Addtional information (Detail) link:presentationLink link:calculationLink link:definitionLink 996207 - Disclosure - Intangible assets - Summary of Changes to intangible assets (Detail) link:presentationLink link:calculationLink link:definitionLink 996217 - Disclosure - Intangible assets - Summary of Amortization expense (Detail) link:presentationLink link:calculationLink link:definitionLink 996227 - Disclosure - Leases - Summary of right-of use assets (Detail) link:presentationLink link:calculationLink link:definitionLink 996237 - Disclosure - Leases - Details of Lease liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 996247 - Disclosure - Leases - Summary of expenses related to right-of-use assets and lease liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 996257 - Disclosure - Leases - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996267 - Disclosure - Accounts payable - Summary of Accounts Payable (Detail) link:presentationLink link:calculationLink link:definitionLink 996277 - Disclosure - Other current liabilities - Summary of other current liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 996287 - Disclosure - Other current liabilities - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996297 - Disclosure - Share-based payments - Summary of Options Granted Priced Using Black Scholes for SARs, Tandem Awards, Converted Options, Matching Stock Options and Monte Carlo Option Pricing Model (Detail) link:presentationLink link:calculationLink link:definitionLink 996307 - Disclosure - Share-based payments - Summary of Employee Share Options (Detail) link:presentationLink link:calculationLink link:definitionLink 996317 - Disclosure - Share-based payments - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996327 - Disclosure - Share-based payments - Summary of Employee Related Share Based Compensation Expense (Detail) link:presentationLink link:calculationLink link:definitionLink 996337 - Disclosure - Shareholders' equity - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996347 - Disclosure - Financial Risk Management Objectives and Policies - Summary of Currency Risk Exposure (Detail) link:presentationLink link:calculationLink link:definitionLink 996357 - Disclosure - Financial Risk Management Objectives and Policies - Summary of Sensitivity Analysis of Foreign Currency Risk (Detail) link:presentationLink link:calculationLink link:definitionLink 996367 - Disclosure - Financial Risk Management Objectives and Policies - Summary of Sensitivity Analysis of Foreign Currency Risk (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996377 - Disclosure - Financial Risk Management Objectives and Policies - Summary of Liquidity Risk (Detail) link:presentationLink link:calculationLink link:definitionLink 996387 - Disclosure - Financial Risk Management Objectives and Policies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996397 - Disclosure - Financial Instruments - Summary of Carrying Amounts and Fair values of Group's Financial Instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 996407 - Disclosure - Financial Instruments - Summary of Net Result from Financial Instruments by Measurement Categories (Detail) link:presentationLink link:calculationLink link:definitionLink 996417 - Disclosure - Financial Instruments - Summary of Changes of the Liabilities from Financing Activities Classified as Cash Effective and Non-cash Effective (Detail) link:presentationLink link:calculationLink link:definitionLink 996427 - Disclosure - Commitments and contingencies - Summary of Contractual Obligations (Detail) link:presentationLink link:calculationLink link:definitionLink 996437 - Disclosure - Commitments and contingencies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996447 - Disclosure - Related party disclosures - Summary of Compensation of Key Management Personnel (Detail) link:presentationLink link:calculationLink link:definitionLink 996457 - Disclosure - Related party disclosures - Summary of Compensation for the Supervisory Board (Detail) link:presentationLink link:calculationLink link:definitionLink 996467 - Disclosure - Related party disclosures - Summary of Compensation for the Supervisory Board (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996477 - Disclosure - Related party disclosures - Summary of Options Granted to Managing Director and Supervisory Directors (Detail) link:presentationLink link:calculationLink link:definitionLink 996487 - Disclosure - Related party disclosures - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996497 - Disclosure - Earnings and Loss per Share - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996507 - Disclosure - Earnings and Loss per Share - Summary of Earnings and Loss per Share (Detail) link:presentationLink link:calculationLink link:definitionLink 999009 - Disclosure - Anchoring link:presentationLink link:calculationLink link:definitionLink Public offering. Public Offering [Member] Public Offering [Member] Cash outflow for leases Cash payments for leases Current prepaid expenses Prepaid expenses Sale Of Stock [Member] Sale Of Stock Member Bonds and short-term deposits. Bonds and Short Term Deposits Bonds and short-term deposits Accruals classified as current Accrual for vacation and overtime Other employee expense other miscellaneous expenses DE - Germany. DE [Member] Germany [Member] Top of range [member] Top of range [Member] Interest expense Interest expenses Entity Incorporation, State or Country Code Other Lease Obligations Other lease obligations. Other Lease Obligations Disclosure of revenue from collaboration agreements. Disclosure Of Revenue From Collaboration Agreements [Line Items] Grant and allowance recognition amount Grant and Allowance recognition Amount Grant and allowance recognition amount. Disclosure Of Currency Risk Exposure [Line Items] Percentage on limitation on tax loss carryforwards after prior period. Percentage on Limitation on tax loss carryforwards after prior period Percentage on limitation on tax loss carryforwards after prior period General And Administrative Expenses [Member] General and Administrative Expenses. General and administrative expenses [Member] Entity Current Reporting Status Number Of Shares purchased Number of shares purchased. Total number of shares purchased Revision of prior-period financial statements Description of nature of accounting errors in prior periods [text block] Restatement of previously issued financial statements Paul Carter [Member] Paul Carter [Member] Paul Carter Member Increase (decrease) through share-based payment transactions, equity Equity-settled share-based compensation Amendments to IFRS 9 and IFRS 7 Amendments To Ifrs Nine And Ifrs Seven [Member] Amendments To Ifrs Nine And Ifrs Seven. Revenue from collaboration agreements Revenue from collaboration agreements Revenue from collaboration agreements Receipt of upfront of payment Classes of property, plant and equipment [axis] Summary of correction of the deferred liabilities impacted Consolidated Statement of Cash Flows Summary of correction of the deferred liabilities impacted Consolidated Statement of Cash Flows [Table Text Block] Summary of correction of the deferred liabilities impacted consolidated statement of cash flows. Payments of lease liabilities, classified as financing activities Payments for leases Repayment of lease liabilities Adjustments for unrealised foreign exchange and expected credit loss. Adjustments For Unrealised Foreign Exchange And Expected Credit Loss Net foreign exchange differences and expected credit losses Amendment to IAS one. Amendment To IAS One [Member] Amendment to IAS 1 Non-current lease liabilities Lease liabilities – non-current Lease liabilities Disclosure of detailed information about changes of the liabilities from financing activities classified as cash effective and noncash effective [Table]. Disclosure Of Detailed Information About Changes of the Liabilities from Financing activities Classified as Cash Effective andNoncashEffective [Table] Percentage of reasonably possible decrease in unobservable input, liabilities Percentage of resonably possible decrease in unobservable inputs Classes of financial assets [axis] Option life, share options granted Time period (years) Document Fiscal Period Focus Disclosure of detailed information about intangible assets [abstract] Other financial assets Other financial assets Entity Shell Company Liabilities from financing activities non cash effective Liabilities from financing activities non cash effective. Non-cash effective Disclosure Of Revenue From Contract With Customers [Table] Service options four five. Service Options Five [Member] Cash flows from (used in) financing activities Net cash provided by/(used in) financing activities Net cash flows from (used in) financing activities Cybersecurity Risk Management, Strategy, and Governance [Abstract] Disclosure of changes in accounting policies, accounting estimates and errors [text block] Correction of deferred tax liabilities Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Cybersecurity Risk Board of Directors Oversight [Text Block] Issue of equity Issue of equity Other current financial assets Other financial assets Dilutive effect of share options on number of warrants. Dilutive effect of share options on number of warrants Dilutive effect of share options on number of warrants Classes of financial instruments [axis] Borrowings, maturity Borrowings maturity Finance costs Other financial expenses Other financial expenses Other financial expenses Disclosure Of Other Income Explanatory Disclosure of other income explanatory. Schedule of Other Income Entity Filer Category Basis Of Preparation [Abstract] Basis Of Preparation. Less than 1year [Member] Not later than one year [member] Value at risk net. Value at Risk Net Carrying amount Disclosure of detailed information about finance income expense explanatory. Disclosure Of Detailed Information About Finance Income Expense Explanatory [Text Block] Summary of financial income and financial expenses Disclosure Of Other Income1 [Table Text Block] Disclosure of other income. Schedule of Other Income Cash and cash equivalents [Member] Cash And Cash Equivalent [Member] Cash And Cash Equivalents Member Classes of intangible assets and goodwill [domain] Financial liabilities Financial liabilities, Carrying amount Total financial liabilities Liabilities from financing activities at beginning of period Liabilities from financing activities at end of period Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Intangible Assets [Member] Intangible assets [Member] Intangible Assets Member Disclosure of reconciliation of changes in intangible assets and goodwill [text block] Summary of Changes to Intangible Assets Temporary difference, unused tax losses and unused tax credits [axis] Key management personnel compensation share based compensation expense. Key Management Personnel Compensation Share Based Compensation Expense Share-based compensation expense Disclosure of other assets [text block] Other current and non-current assets Other Current Liabilities [Abstract] Other Current Liabilities. Disclosure of events after reporting period [abstract] Disclosure of events after reporting period [abstract] Disclosure Of Accounting Judgements Estimates And Assumptions [Abstract] Disclosure Of Accounting Judgements Estimates And Assumptions. Cybersecurity Risk Management Third Party Engaged [Flag] Cash and cash equivalents Cash and cash equivalents at end of the year Cash and cash equivalents at beginning of the year Cash and cash equivalents Total cash and cash equivalents License development and commercialization agreement. License Development And Commercialization Agreement [Member] License Development and Commercialization Agreement [member] Profit (loss) from operating activities Operating result Gains on other financial instruments Gains (losses) on financial assets at fair value through profit or loss Total gains (losses) on financial assets at fair value through profit or loss Disclosure of Sensitivity Analysis For Each Type Of Market Risk [Table] Disclosure of contract liabilities. Disclosure Of Contract Liabilities [Text Block] Summary of Deferred revenue related to the collaboration agreements Milestone [Axis] Assets [abstract] Assets Alise Reicin [Member] Alise Reicin. Alise Reicin [Member] Disclosure of leases [text block] Leases Tranche Two [Member] Tranche Two [Member] Geographical [Domain] Disclosure of transactions between related parties [abstract] Comprehensive income Comprehensive income/(loss) for the year Total comprehensive income/(loss) for the year Income Tax [table] Income Tax. Disclosure of non mandatory standards and interpretations issued by the IASB. Disclosure Of Non Mandatory Standards And Interpretations Issued By The IASB [Table Text Block] Summary of Non Mandatory standards and amendments issued by IASB Laboratory equipment. Laboratory Equipment [Member] Laboratory equipment [Member] Financial liabilities at fair value through profit or loss, category [member] Financial liabilities at fair value through profit or loss, category [Member] Ifrs Ninteen Subsidiaries without Public Accountability [Member] Ifrs Ninteen Subsidiaries without Public Accountability. IFRS 19 Subsidiaries without Public Accountability Disclosure of deferred tax assets and liabilities. Disclosure Of Deferred Tax Assets And Liabilities [Table Text Block] Summary of Deferred Tax Assets and Deferred Tax Liabilities Depreciation, property, plant and equipment Depreciation, property, plant and equipment Accumulated tax losses, no deferred tax assets beyond offsetting amounts for deferred tax liabilities Unused Tax Losses For Which No Deferred Tax Asset Beyond Off setting Amounts For Deferred Tax Liabilities Unused tax losses for which no deferred tax asset beyond off setting amounts for deferred tax liabilities. Disclosure of finance income expense explanatory. Disclosure Of Finance Income Expense Explanatory [Abstract] At the market agreement member. At The Market Agreement [Member] At The Market Agreement [Member] Carrying amount [member] Carrying amount [Member] Disclosure of detailed information about financial instruments [line items] Currency [Axis] Other assets Other assets Disclosure of reconciliation of changes in intangible assets and goodwill [abstract] Amendments to Ifrs nineteen [Member] Amendments to Ifrs nineteen [Member] Amendments to IFRS 19 Disclosure of expenses related to right-of-use assets and lease liabilities. Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Abstract] BMS opt in agreement. BMS Opt in Agreement [Member] Lease liabilities Total Other Income Other Other income other Other Cybersecurity Risk Management, Strategy, and Governance [Table] Intangible assets other than goodwill Intangible assets Event [Domain] Disclosure of detailed information about other current liabilities Table. Disclosure of detailed information about other current liabilities [Table] Increase (decrease) through exercise of options, equity Share options exercised Unpaid investment decreased Unpaid investment decreased Unpaid Investment Decreased Purchase of investments other than investments accounted for using equity method Payments for investments classified in Other financial assets Document Shell Company Report Receivables from collaboration agreements. Receivables From Collaboration Agreements Gross Proceeds From Initial Public Offer Gross proceeds from initial public offer. Gross Proceeds From Initial Public Offer Key management personnel compensations. Key Management Personnel Compensations Total cash compensation Subsidiaries [domain] Disclosure of transactions between related parties [line items] Disclosure of non-adjusting events after reporting period [line items] Other short-term employee benefits Other employee benefits Disclosure of detailed information about share based compensation expense [Abstract]. Disclosure Of Detailed Information About Share Based Compensation Expense [Abstract] Profit/(loss) before taxes Profit/(loss) before taxes Profit/(loss) before tax Profit Financial assets held for managing liquidity risk Financial assets held for managing liquidity risk Disclosure Of Personnel Expenses Explanatory. Disclosure Of Personnel Expenses Explanatory [Text Block] Personnel expenses Cash flows from (used in) operating activities Net cash provided by/(used in) operating activities Net cash flows from (used in) operating activities Date of authorisation for issue of financial statements Date of authorisation for issue of financial statements Liquidity risk [Member] Liquidity risk [member] Agreement [Domain] Date of expiry of share options granted. Date Of Expiry Of Share Options Granted Expiration date Disclosure Of Group Information [Abstract] Disclosure Of Group Information. Milestone Payment For Licensed Product [Member] Applicable tax rate Statutory tax rate Entity Well-known Seasoned Issuer Mathias hothum member. Mathias Hothum [Member] Mathias Hothum [Member] Disclosure of compensation Managing directors and supervisory board. Disclosure of compensation Managing directors and supervisory board [Text Block] Summary of Options Granted to Managing Director and Supervisory Directors Unused tax losses for which no deferred tax asset recognised Unused tax losses for which no deferred tax asset recognised Disclosure of detailed information about net result from financial instruments by measurement categories [Table]. Disclosure Of Detailed Information About Net Result from Financial Instruments by Measurement Categories [Table] Disclosure of range of exercise prices of outstanding share options [text block] Summary of Employee Share Options Payments of right of use assets classified as financing activities. Payments Of Right Of Use Assets Classified As Financing Activities Payments of right of use assets classified as financing activities Loss recognised on financial instruments whose fair value previously could not be reliably measured. Loss Recognised On Financial Instruments Whose Fair Value Previously Could Not Be Reliably Measured Losses on financial instruments Losses on other financial instruments Increase (decrease) in number of ordinary shares issued Increase (decrease) in number of ordinary shares issued Additions other than through business combinations, property, plant and equipment Additions Property Plant And Equipment Other reserves [member] Other reserves [member] Amendment Flag Prepaid Expenses For Clinical Research Organizations Insurance and Other Services Prepaid expenses for clinical research organizations insurance and other services. Prepaid expenses for clinical research organizations insurance and other services Tax effect of permanent differences. Tax Effect Of Permanent Differences Permanent Differences Permanent Differences Disclosure of share capital, reserves and other equity interest [text block] Shareholders' equity Disclosure of detailed information about property, plant and equipment [line items] Moderna Agreement [Member] Moderna agreement. Authorization of financial statements. Authorization Of Financial Statements [Member] Authorization Of Financial Statements [Member] Borrowings by name [domain] Upfront payment received. Upfront Payment Received Upfront payment received Classes of intangible assets and goodwill [axis] Entity Address, Postal Zip Code Categories of related parties [domain] Other non-current liabilities Cybersecurity Risk Role of Management [Text Block] Disclosure Of Financial Risk Management [Abstract] Disclosure Of Financial Risk Management. Additional payment related to performance obligations received. Additional Payment Related to Performance Obligations Received Additional payment related to performance obligations received Adjustment for equity settled share-based payment. Adjustment for equity settled sharebased payment Equity settled share-based payment Government grants exempted from taxes Tax Effect Of Government Grants Exempted From Taxes Tax effect of government grants exempted from taxes. Government grants exempted from taxes Explanation of issues, repurchases and repayments of debt and equity securities Granted on march two thousand and twenty one. Granted On March Two Thousand And Twenty One [Member] Granted On March 2021 [Member] Entity Address, Address Line One Disclosure of expected impact of initial application of new standards or interpretations [abstract] Amendment To IAS Twenty One Lack Of Exchangeability [Member] Amendment To IAS Twenty One Lack Of Exchangeability. Amendments to IAS 21 - Lack of Exchangeability Private Placement [Member] Private Placements [Member] Private Placements [Member] Performance obligations cumulative upfront payments received. Performance Obligations Cumulative Upfront Payments Received Performance obligations cumulative upfront payments received Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Data base activities. Data Base Activities [Member] Date of grant . Date Of Grant [Member] Later than five years [member] More than 5 years [Member] Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] Number of shares issued Number of shares Classes of employee benefits expense [abstract] Classes of employee benefits expense [abstract] Tranche Three [Member] Tranche Three [Member] Unobservable inputs [axis] Disclosure of income tax [text block] Income Tax Disclosure Of Currency Risk Exposure Explanatory. Disclosure Of Currency Risk Exposure Explanatory [Table Text Block] Summary of Currency Risk Exposure Trade and other current receivables [abstract] Change in fair value of warrant liabilities Changes In Fair Value Of Warrant Liabilities Changes in fair value of warrant liabilities. Document Type Disclosure of amortization expenses. Disclosure Of Amortization Expenses [Table Text Block] Summary of Depreciation Expense Cash flows from (used in) investing activities Net cash (used in)/provided by investing activities Net cash flows from (used in) investing activities Disclosure of material accounting policy information [text block] Summary of material accounting policies applied by the Group for the annual reporting period ending December 31, 2024 Disclosure of other current liabilities [text block] Other current liabilities Gains (losses) on financial liabilities at fair value through profit or loss Change in fair value of liabilities for warrants Change in fair value of liabilities for warrants Change in fair value of liabilities of warrants Entity Central Index Key Transaction costs deducted from equity. Transaction Costs Deducted From Equity Transaction costs deducted from equity Deferred tax liabilities off set. Deferred Tax Liabilities Off set Deferred tax liabilities netting Disclosure of personnel expenses explanatory [abstract] Disclosure of personnel expenses explanatory. Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] Credit risk [Member] Credit risk [member] Amendment to IAS twenty one. Amendment To IAS Twenty One [Member] Amendment to IAS 21 Bottom of range [member] Bottom of range [Member] Effects of exchange rate changes and expected credit losses on cash and cash equivalents. Effects Of Exchange Rate Changes And Expected Credit Losses On Cash And Cash Equivalents Effects of exchange rate changes and expected credit losses on cash and cash equivalents Title of new IFRS Property, plant and equipment including right-of-use assets [axis] United States of America, Dollars US [Member] Geographical areas [axis] Current tax expense (income) Expected taxes Current tax expense (income), Total Expected taxes Current income tax Current income tax corporate income tax rate. corporate income tax rate Corporate income tax rate Allowance not yet paid Allowance not yet paid. Allowance not yet paid Major ordinary share transactions [member] Major ordinary share transactions [member] Key management personnel compensation Total Contractual cash obligation. Contractual Cash Obligation Total Euro Member Countries, Euro Euro [Member] Retained earnings [member] Accumulated deficit [member] Lease liabilities [abstract] Document Financial Statement Error Correction [Flag] Disclosure Of Revenue From Contract With Customers [Line Items] Categories of financial assets [domain] Types of risks [domain] GERMANY Deferred Asset Recognised [Member] Recognized [Member] Deferred Asset Recognised Member Disclosure of revenue from collaboration agreements explanatory. Disclosure of Revenue From Collaboration Agreements Explanatory Summary of revenue from collaboration agreements explanatory Percentage Of Reasonably Possible Increase In Foreign Currency Risk. Percentage Of Reasonably Possible Increase In Foreign Currency Risk Percentage Of Reasonably Possible Increase In Foreign Currency Risk Disclosure of trade and other payables [text block] Accounts payable Research And Development Expenses [Member] Research And Development Expenses. Research and development expenses [Member] Closing foreign exchange rate Conversion rate Maximum exposure to credit risk Maximum exposure to credit risk Proceeds from issue of ordinary shares Proceeds from issue of ordinary shares G S K Collaboration Agreement [Member] GSK Collaboration Agreement [Member] GSK Ownership [Domain] Current Fiscal Year End Date Prior period income tax refund from income tax prepayments Prior Period Income Tax Refund From Income Tax Prepayments Prior period income tax refund from income tax prepayments. Disclosure of accounts payable explanatory. Disclosure Of Accounts Payable Explanatory [Table Text Block] Summary of Accounts Payable Upfront payment for commercial supply Upfront payment for commercial supply. Disclosure of expected impact of initial application of new standards or interpretations [text block] Summary of Application of new amendments Milestone regulatory and royalty payment received. Milestone Regulatory And Royalty Payment Received Milestone regulatory and royaly payment receivable Entity Address, State or Province Property, plant and equipment [member] Property, Plant and Equipment [Member] Description of accounting policy for research and development expense [text block] Research and development Genmab Collaboration Agreement [Member] Genmab Current liabilities Total current liabilities Current liabilities Warrants [Member] Warrants [Member] Heather L Mason [Member] Heather L. Mason [Member] Heather L Mason Member Disclosure of detailed information about other current liabilities line items. Disclosure of detailed information about other current liabilities [Line Items] Other non current asset. Other Non Current Asset Other assets Geographical [Axis] Liabilities from financing activities cash effective Liabilities from financing activities cash effective. Cash effective Document Information, Document [Axis] Finance income (cost) Financial result Financial result Retrospective application and retrospective restatement [axis] Non-adjusting events after reporting period [axis] Disclosure of expenses related to right-of-use assets and lease liabilities. Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Line Items] Investee1 [Member] Investee. Adjustments for interest income Interest income Disclosure of expenses related to right-of-use assets and lease liabilities. Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Table] Classes of financial liabilities [domain] Share based compensation by share based payment arrangement weighted average fair value per share. Share Based Compensation By Share Based Payment Arrangement Weighted Average Fair Value Per Share Share based compensation by share based payment arrangement weighted average fair value per share Adjustments for decrease (increase) in other assets (Increase)/decrease in other assets Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, recognised in profit or loss, before tax, liabilities Increase decrease in fair value measurement due to a reasonably possible decrease in unobservable input recognized in profit or loss before tax liabilities Disclosure of expected impact of initial application of new standards or interpretations [line items] Financial Risk Management Objectives And Policies [Line Items] Financial risk management objectives and policies. Disclosure of detailed information about changes of the liabilities from financing activities classified as cash effective and noncash effective explanatory [Text Block]. Disclosure Of Detailed Information About Changes of the Liabilities from Financing activities Classified as Cash Effective and Noncash Effective Explanatory Summary of changes of the liabilities from financing activities classified as cash effective and non-cash effective Disclosure of financial risk management [text block] Financial Risk Management Objectives and Policies Disclosure of detailed information about net result from financial instruments by measurement categories [Line Items]. Disclosure Of Detailed Information About Net Result from Financial Instruments by Measurement Categories [Line Items] Ordinary Share [Member] Common Shares [Member] Deferred Liability Netting [Member] Netting [Member] Deferred Liability Netting Member Disclosure of detailed information about financial instruments [text block] Summary of Carrying Amounts and Fair values of Group's Financial Instruments Weighted average exercise price of share options forfeited in share-based payment arrangement SARs forfeited Employee health insurance cost. Employee Health insurance Cost Employee health insurance cost Description of accounting policy for share-based payment transactions [text block] Share-based payment Amounts payable, related party transactions Amounts payable, related party transactions Later than one year [member] Percentage of pretax income subject to income tax. Percentage Of Pretax Income Subject To Income Tax Number of share options exercised in share-based payment arrangement SARs exercised Cash flows from (used in) investing activities [abstract] Cash flows from investing activities Disclosure of lease liabilities. Disclosure Of Lease Liabilities [Table Text Block] Details of Lease liabilities ShortTerm Deposits [Member] Short-Term Deposits [Member] Short-Term Deposits [Member] Shortterm Deposits Member Additional Grants Under Two Thousand And Twenty And Two Thousand And Twenty Two Plan [Member] Additional Grants Under 2020 Plan [Member] Additional Grants Under 2020 and 2022 Plan [Member] Additional Grants Under Two Thousand And Twenty And Two Thousand And Twenty Two Plan Member Disclosure of amortization expenses. Disclosure Of Amortization Expenses [Abstract] Disclosure of revenue from collaboration agreements. Disclosure Of Revenue From Collaboration Agreements [Abstract] Weighted average exercise price of share options exercisable in share-based payment arrangement SARs exercisable Trade and other receivables [abstract] Net Profit/(loss) available to common shareholders Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating basic earnings per share Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating basic earnings per share Interest received, classified as operating activities Interest received Disclosure of commitments and contingent liabilities [text block] Commitments and contingencies Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [line items] Adam Stone [Member] Adam Stone [Member] Adam Stone Member Disclosure of terms and conditions of share-based payment arrangement [table] Classes of financial liabilities [axis] Earnings per share [abstract] Net profit/(loss) per share: Non-recognition of deferred taxes on tax losses and temporary differences. Non recognition of deferred taxes on tax losses and temporary differences Non-recognition of deferred taxes on tax losses and temporary differences Non-recognition of deferred taxes on tax losses and temporary differences Agreement one. Agreement One [Axis] Unobservable inputs [domain] Disclosure of property, plant and equipment [text block] Property, plant and equipment Additions other than through business combinations, intangible assets other than goodwill Additions Income Tax. Income Tax [Line Items] Nonadjusting Events After Reporting Period [Member] Nonadjusting Events After Reporting Period. Current contract liabilities Current Deferred revenue Disclosure of detailed information about net result from financial instruments by measurement categories [Abstract]. Disclosure Of Detailed Information About Net Result from Financial Instruments by Measurement Categories [Abstract] Date of grant [Axis]. Date Of Grant [Axis] Exercise price, share options granted Strike Price in USD Exercise price Trade Tax [Member] Trade tax. Trade Tax Disclosure of detailed information about property, plant and equipment [text block] Summary of Changes to Property, Plant and Equipment Auditor Firm ID Deferred Expenses [Member] Deferred expenses [Member] Deferred Expenses Member New IFRSs [domain] Deferred Revenue [Member] Deferred revenue [Member] Deferred Revenue Member Wages and salaries Wages and salaries Research funding payment received allocated to contract transaction price. Research Funding Payment Received Allocated To Contract Transaction Price Research funding payment received allocated to contract transaction price Disclosure of reclassifications or changes in presentation [line items] Ifrs Eighteen Replaces Ias One. IFRS 18 replaces IAS 1 Ifrs Eighteen Replaces Ias One [Member] Revenue from contracts with customers Revenue from contracts with customers Equity and liabilities Total liabilities and shareholders' equity Total liabilities and shareholder's equity (deficit) Maximum Exposed to Currency risk. Maximum Exposed to Currency risk Total assets exposed to the risk Class Of Warrant Or Right Exercise Price Of Warrants Or Rights Class of warrant or right exercise price of warrants or rights. Exercise price of warrants or rights Disclosure of reconciliation of changes in intangible assets and goodwill [table] Additions to right-of-use assets Disposal Disposals, intangible assets other than goodwill Disposals, intangible assets other than goodwill Disposal Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Service Options One [Member] Description of accounting policy for recognition of revenue [text block] Revenue from collaboration agreements Types of risks [axis] Service Options [Member] Euro strengthen by 10 against US dollars [Member] Euro strengths by 10% against U.S. dollars [Member] Finance income Other financial income Other financial income Document Information [Line Items] Disclosure Of Currency Risk Exposure [Abstract] Payments for share issue costs Payments for share issue costs Disclosure of quantitative information about right-of-use assets [abstract] Advanced TCER activities. Advanced TCER Activities [Member] Service options two. Service Options Two [Member] Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Temporary difference, unused tax losses and unused tax credits [domain] Key management personnel compensation, termination benefits Sale of stock issue price per share. Sale Of Stock Issue Price Per Share Sale Of Stock Issue Price Per Share Milestone Achievement [Member] Milestone Achievement Percentage Of Reasonably Possible Decrease In Foreign Currency Risk. Percentage Of Reasonably Possible Decrease In Foreign Currency Risk Percentage Of Reasonably Possible Decrease In Foreign Currency Risk Interest paid, classified as operating activities Interest paid Dilutive effect of warrants on weighted average number of ordinary shares Effect of potentially dilutive warrants / shares option Document Registration Statement Capital requirements [axis] Moderna Collaboration Agreement Member. Moderna Collaboration Agreement [Member] Moderna Current lease liabilities Lease liabilities – current Lease liabilities Non-current contract liabilities Non-current Deferred revenue Classes of share capital [domain] Disclosure of correction of deferred liabilities impacted to Consolidated Statement of Profit and Loss [Table text block] Disclosure of correction of deferred liabilities impacted to consolidated statement of profit and loss. Summary of correction of the deferred liabilities impacted Consolidated Statement of Profit and Loss Type Of Vesting [Domain] Business Contact [Member] Grants and other reimbursements from government agencies Grants and other reimbursements from government agencies. Disclosure of share-based payment arrangements [text block] Share-based payments Disclosure of detailed information about intangible assets [line items] Disclosure of detailed information about financial instruments [table] Disclosure of terms and conditions of share-based payment arrangement [abstract] Expense from share-based payment transactions with employees Share-based compensation expense UNITED STATES United States Classes of share capital [axis] Classes of share capital [axis] Types of share-based payment arrangements [domain] Adjustments for interest expense Interest expenses Parent [member] Immatics N V [Member] Share issue related cost Share issue related cost Statements [Line Items] Statements [Line Items] Statements Line Items Bms Agreement. Bms Agreement [Member] Tranche [Member]. Tranche [Member] Income Tax Refunded Income tax refunded. Income tax refunded Disclosure of detailed information about share based compensation expense [Table]. Disclosure Of Detailed Information About Share Based Compensation Expense [Table] Milestone [Domain] Group [Member] Immatics N V, Immatics Biotechnologies GmbH and Immatics US Inc [Member] Immatics N V, Immatics Biotechnologies GmbH and Immatics US Inc [Member] Key management personnel compensation, other long-term employee benefits Variable Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Gains (losses) on exchange differences on translation, net of tax Currency translation differences from foreign operations Disclosure of detailed information about share based compensation expense. Disclosure Of Detailed Information About Share Based Compensation Expense [Text Block] Summary of Employee Related Share Based Compensation Expense Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Allocation of upfront payment towards clinical trial services. AllocationOfUpfrontPaymentTowardsClinicalTrialServices Allocation of upfront payment towards clinical trial services Twenty Six Year Tax Losses carryforward [Member] Twenty Six Year Tax Losses Carryforward [Member] Twenty Six Year Tax Losses Carryforward Member Share premium Disclosure of events after reporting period [text block] Events occurring after the reporting period Number of share options exercisable in share-based payment arrangement SARs exercisable Issue of share capital – net of transaction costs. Issue Of Share Capital Net Of Transaction Costs Issue of share capital – net of transaction costs Issue Of Share Capital Net Of Transaction Costs Average price paid per share Average Price Paid Per Share On Purchase Average price paid per share on purchase. Non cash investments Non cash investments. Non Cash Investments Contract liabilities recognized. Contract Liabilities Recognized Contract liabilities recognized contract liabilities recognized Contract liabilities recognized Disclosure of contractual obligations. Disclosure Of Contractual Obligations [Table Text Block] Summary of Contractual Obligations Number of share options outstanding in share-based payment arrangement Number of share options, outstanding at December 31, Number of share options, outstanding at January 1, Entity Address, City or Town Increase in number of ordinary shares Increase Decrease In Number Of Ordinary Shares Increase decrease in number of ordinary shares. Disclosure of detailed information about other current liabilities abstract. Disclosure of detailed information about other current liabilities [Abstract] Increase (decrease) through net exchange differences, intangible assets and goodwill Currency translation differences Directors and executive officers [Member] Directors and executive officers [Member] Directors and executive officers [Member] Current value added tax receivables Value added tax receivables Disclosure of reclassifications or changes in presentation [table] Disclosure of Sensitivity Analysis For Each Type Of Market Risk [Line Items] Trade and other current payables [abstract] Non-current assets Total non-current assets Security Exchange Name Prepaid expense for supply of clinical materials Prepaid expense for supply of clinical materials. Contact Personnel Name Adjustments for decrease (increase) in trade accounts receivable (Increase)/decrease in accounts receivables Converted Stock options One [Member] Converted Stock options One. Intangible assets and goodwill Ending Balance Beginning Balance Counterparty Name [Axis] Disclosure of classes of share capital [line items] Disclosure of classes of share capital [line items] 1 - 3 years [Member] Later than one year and not later than three years [member] Lease Liability [Member] Lease liabilities [Member] Lease Liability Member Deferred tax liabilities Deferred tax liabilities Deferred tax liabilities Deferred tax liability Statement of changes in equity [abstract] Profit (loss) Net profit/(loss) Net profit/(loss) Disposals of property, plant and equipment. Disposals of Property Plant and Equipment Disposals Statistical Measurement [Domain] Foreign exchange rates [abstract] Document Period End Date Current tax liabilities Income tax liability Denmark DENMARK Other current assets Total ICFR Auditor Attestation Flag Categories of related parties [axis] Minimum market capitalization. Minimum Market Capitalization Minimum market capitalization Disclosure of non-adjusting events after reporting period [table] Software Licenses [Member] Software licenses. Software Licenses [Member] Agreement one. Agreement One [Member] Number of instruments granted in share-based payment arrangement Number of Options Right-of-use assets Adjustments for increase decrease in deferred revenue trade and other payables. Adjustments For Increase Decrease In Deferred Revenue Trade And Other Payables Increase/(decrease) in deferred revenue, accounts payables and other liabilities Other income Total Issued capital Share capital Total issued capital Short-term employee benefits expense Total other employee benefits Tax expense (income) Taxes on income Taxes on income Taxes on income Taxes on income Tax income (expense) Revenue [abstract] Deferred Tax Liabilities Deferred expenses [Member] Recognized [Member] Deferred Tax Liabilities Deferred Expenses Member Contract liabilities Contract Liabilities Total Cybersecurity Risk Management, Strategy, and Governance [Line Items] Investee Axis. Investee [Axis] Amortisation, intangible assets other than goodwill Amortisation, intangible assets other than goodwill Michael G Atieh [Member] Michael G. Atieh [Member] Michael G Atieh Member Liabilities for warrants [Member]. Liabilities for Warrants [Member] Liabilities for warrants [Member] Classes of financial assets [domain] Expected dividend as percentage, share options granted Dividend yield All Currencies [Domain] Disclosure of detailed information about changes of the liabilities from financing activities classified as cash effective and noncash effective [Abstract]. Disclosure Of Detailed Information About Changes of the Liabilities from Financing activities Classified as Cash Effective andNoncashEffective [Abstract] Allocation of upfront payment towards license grant. Allocation of Upfront Payment Towards License Grant Allocation of upfront payment towards license grant Disclosure of reclassifications or changes in presentation [abstract] Date of end of reporting period Weighted average share price, share options granted Underlying share price Weighted average share price of share options granted Sale Of Stock [Axis] Sale Of Stock Axis Entity File Number Sensitivity analysis for types of market risk [text block] Summary of Sensitivity Analysis of Foreign Currency Risk Cover [Abstract] Gross proceeds from issue of securities. Gross Proceeds From Issue Of Securities Gross Proceeds From Issue Of Securities Allocation of aggregate transaction price. Allocation of Aggregate Transaction Price Allocation of aggregate transaction price Disclosure of quantitative information about right-of-use assets [line items] Tax benefit arising from previously unrecognised tax loss, tax credit or temporary difference of prior period used to reduce current tax expense Utilization of previously unrecorded tax losses carried forward Utilization of previously unrecorded tax losses carried forward Tax loss carryforward [Member] Tax loss carryforward. IFRS 7 Not Applicable and IFRS 16 [member] IFRS 7 Not Applicable and IFRS 16. IFRS 7 not applicable and IFRS 16 [Member] Currency risk [Member] Currency risk [member] Share based payment arrangement explanatory [Abstract] Share based payment arrangement explanatory. Other comprehensive income [abstract] Other comprehensive income/(loss) Net foreign exchange gain Foreign currency gains Contractual obligation of lease liabilities. Contractual Obligation Of Lease Liabilities Lease liabilities Disclosure of related party [text block] Related party disclosures Current liabilities [abstract] Current liabilities Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Friedrich von Bohlen und Halbach [Member] Friedrich von Bohlen und Halbach [Member] Friedrich von Bohlen und Halbach [Member] Other current/non-current assets [Member] Other Current Non Current Assets [Member] Other current/non-current assets [Member] Disclosure of other non-current assets [text block] Summary of Other non-current assets Categories of financial liabilities [axis] Share listing expense Share listing expense [Axis] Eliot Forster [Member] Eliot Forster [Member] Eliot Forster Member Thereafter. Thereafter [Member] Thereafter [Member] Key management personnel compensation supervisory board compensation. Key Management Personnel Compensation Supervisory Board Compensation Supervisory board compensation Income taxes paid (refund) Income tax paid Total income taxes paid (refund) Income tax paid Document Financial Statement Restatement Recovery Analysis [Flag] Earnings and Loss per Share Disclosure of earnings per share [text block] Excepted Current Tax Expense Income Excepted current tax expense income. Expected taxes Expected taxes Share Purchase Period Share purchase period. Period Description of method of settlement for share-based payment arrangement Type of option Number of shares outstanding Number of shares outstanding Ownership [Axis] Income Statement Location1 [Member] Income Statement Location. Accounts payables [Member] Accounts payables [member] Accounts payables. Disclosure of terms and conditions of share-based payment arrangement [line items] Disclosure of terms and conditions of share-based payment arrangement [line items] Financial liabilities at amortised cost, category [member] Financial liabilities at amortised cost, category [Member] Disclosure of other current assets [text block] Summary of Other current assets Capital requirements [domain] Annual Improvements to IFRS Accounting Standards Annual Improvements to IFRS Accounting Standards [Member] Annual Improvements to IFRS Accounting Standards. Foreign exchange gain (loss) Foreign exchange gain (loss) Cybersecurity Risk Management Processes Integrated [Flag] Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Net increase/(decrease) in cash and cash equivalents Net increase in cash and cash equivalents Net increase (decrease) in cash and cash equivalents before effect of exchange rate changes Risk free interest rate, share options granted Risk free rate Document Transition Report Harpreet Singh [Member] Harpreet Singh [Member] Harpreet Singh Member Description of accounting policy for financial instruments [text block] Financial Instruments Profit or loss [abstract] Statement of financial position [abstract] Disclosure of revenue from contracts with customers [text block] Revenue from collaboration agreements Deferred income tax Deferred tax expense (income) Deferred income tax Transaction price allocated to remaining performance obligations Transaction price allocation to performance obligation Document [Domain] Assets and liabilities [axis] Loans and advances at amortised cost, allowance for expected credit losses Loans and advances at amortised cost, allowance for expected credit losses Expected credit losses Immatics Biotechnologies Gmbh [Member] Immatics biotechnologies gmbH. Immatics Biotechnologies GmbH [Member] Current assets [abstract] Current assets Other comprehensive income Other comprehensive income (loss) Property, plant and equipment including right-of-use assets [domain] Classes of assets [domain] Weighted average exercise price of share options granted in share-based payment arrangement SARs granted Amendments To Ifrs Nine And Ifrs Seven Classification and Measurement of Financial Instruments [Member] Amendments to Ifrs nine and Ifrs seven classification and measurement of financial instruments. Amendments to IFRS 9 and IFRS 7 - Classification and Measurement of Financial Instruments Profit (loss), attributable to ordinary equity holders of parent entity [abstract] Numerator: Components of equity [axis] Disclosure of detailed information about foreign exchange rates explanatory. Disclosure Of Detailed Information About Foreign Exchange Rates Explanatory [Table Text Block] Summary of foreign exchange rates Adjustments for gain (loss) on disposals, property, plant and equipment (Gains)/losses from disposal of fixed assets Disclosure of detailed information about net result from financial instruments by measurement categories explanatory [Text Block] Disclosure Of Detailed Information About Net Result from Financial Instruments by Measurement Categories Explanatory Summary of Net Result from Financial Instruments by Measurement Categories Basic earnings (loss) per share Basic Earning/(Loss) per share - basic Total basic earnings (loss) per share Cybersecurity Risk Management Processes Integrated [Text Block] Disclosure of detailed information about share based compensation expense [Line Items]. Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items] Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items] Business combinations [domain] Average foreign exchange rate Non-current prepayments Prepaid expenses Purchase of intangible assets, classified as investing activities Payments for intangible assets Lease liabilities [member] Lease liabilities [Member] Other assets [member] Other assets [Member] Disclosure of compensation supervisory board. disclosure of compensation supervisory board [Text Block] Summary of Compensation for the Supervisory Board Other Current And Non-Current Asset [Abstract] Other current and non-current asset. Adjustments for depreciation and amortisation expense Depreciation and amortization Other current liabilities [Member] Other Current Liability [member] Other current liability. B M S Collaboration Agreement [Member] BMS Collaboration Agreement [Member] BMS Current trade receivables Total Accounts receivables Business combinations [axis] Maturity [domain] Allocation of upfront payment towards clinical trial services and license grant. Allocation of Upfront Payment Towards Clinical Trial Services And License Grant Allocation of upfront payment towards clinical trial services and license grant Share listing expense [Domain] Document Fiscal Year Focus Other Contractual Obligations Other contractual obligations Other contractual obligations Ordinary Shares [Member] Ordinary shares [member] Maturity [axis] Weighted average number of ordinary shares outstanding Weighted average shares outstanding - basic Basic Geographical areas [domain] Disclosure Of Currency Risk Exposure [Table] Percentage of cash and cash equivalents held in domicile. Percentage of Cash and Cash Equivalents Held in Domicile Percentage of cash and cash equivalents held in domicile Currently stated [member] Statements [Table] Statements Table Non-current liabilities Non-current liabilities [abstract] Interest income on other financial assets Interest income Amortisation, assets recognised from costs incurred to obtain or fulfil contracts with customers Amortization of contract costs capitalized Basis of Presentation [Line Items] Basis of presentation. Subsidiaries [axis] Subsidiaries [axis] Expense relating to leases of low-value assets for which recognition exemption has been used Expenses relating to low-value assets Indefinite Tax Losses carryforward [Member] Indefinite Tax Losses Carryforward [Member] Indefinite Tax Losses Carryforward Member Gross carrying amount [member] Gross carrying amount [Member] Non Interest Bearing Liability [Member] Non interest bearing liability. Non Interest Bearing Liability [Member] Amendments to IAS seven and IFRS seven. Amendments to IAS Seven And IFRS Seven [Member] Amendments to IAS 7 and IFRS 7 Disclosure of composition of group [text block] Group information Financial assets at amortised cost, category [member] Financial assets at amortised cost, category [Member] Proceeds from issuing shares Proceeds from issuance of shares to equity holders Disclosure of compensation of key management personnel. Disclosure Of Compensation Of Key Management Personnel [Table Text Block] Summary of Compensation of Key Management Personnel Granted On February 2024 [Member] Granted On February Two Thousand And Twenty Four [Member] Granted on february two thousand and twenty four. Disclosure Of Contractual Obligations [Abstract] Current tax liabilities, current Current tax liabilities, current Payroll tax Weighted average exercise price of share options exercised in share-based payment arrangement SARs exercised Deferred tax expense (income) recognised in profit or loss Remeasurement of deferred taxes resulted in tax income Basis of Preparation [Table] Basis of preparation. ARYA [Member]. ARYA [Member] ARYA [Member] Categories of financial assets [axis] Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] Items that may be reclassified subsequently to profit or loss Proceeds from sales of property, plant and equipment, classified as investing activities Proceeds from disposal of property, plant and equipment Tranche [Axis]. Tranche [Axis] Amendments to IAS 21 - The Effects of Changes in Foreign Exchange Rates Amendment To IAS Twenty One The Effects of Changes in Foreign Exchange Rates [Member] AmendmentToIASTwentyOneTheEffectsofChangesInForeignExchangeRatesMember. Number of share options forfeited in share-based payment arrangement SARs forfeited Corporate Tax [Member] Corporate Tax. CorporateTax Euro weakens by 10 against US dollars [Member] Euro weakens by 10% against U.S. dollars [Member] Disclosure Of Accounts Payables [Abstract] Disclosure Of Accounts Payables. Cash flows from (used in) financing activities [abstract] Cash flows from financing activities Disclosure of accounting judgements and estimates [text block] Significant accounting judgments, estimates and assumptions Disclosure of intangible assets [text block] Intangible assets Statement of changes in equity [line items] Property, plant and equipment Ending Cost Beginning Cost Summary of Current and Deferred Taxes Disclosure Of Current And Deferred Tax Expense Explanatory [Table Text Block] Disclosure of current and deferred tax expense explanatory. Title of 12(b) Security Deferred tax assets offset. Deferred Tax Assets Offset Deferred tax assets netting Number of share options granted in share-based payment arrangement SARs granted Share based compensation by share based payment arrangement options granted during the period Deferred Tax Liabilities Right of use asset [Member] Right-of-use assets [Member] Deferred Tax Liabilities Right Of Use Asset Member Disclosure of correction of deferred liabilities impacted to Consolidated Statement of Financial Position [Table text block] Disclosure of correction of deferred liabilities impacted to consolidated statement of financial position. Summary of correction of the deferred liabilities impacted Consolidated Statement of Financial Position Trade receivables [member] Accounts receivables [Member] Increase decrease in other comprehensive income on basis of higher lower basis points. Increase Decrease In Other Comprehensive Income On Basis Of Higher Lower Basis Points OCI Net financial result. Net Financial Result Net financial result Document Information [Table] Capital gains tax receivable Capital gains tax receivable. Disclosure Of Contractual Obligations [Line Items] Disclosure of detailed information about property, plant and equipment [abstract] Disclosure of detailed information about changes of the liabilities from financing activities classified as cash effective and noncash effective [Line Item]. Disclosure Of Detailed Information About Changes of the Liabilities from Financing activities Classified as Cash Effective andNoncashEffective [Line Items] Post-employment benefit expense, defined contribution plans Post-employment benefit expense, defined contribution plans Disclosure of expected impact of initial application of new standards or interpretations [table] United Kingdom UNITED KINGDOM Revenue recognized during the period performance obligation. Revenue Recognized During The Period Performance Obligation Revenue recognized during the period performance obligation Disclosure of detailed information about financial instruments [abstract] Trading Symbol Immatics GmbH [Member] Immatics GmbH [Member] Immatics Gmbh Member Disclosure of basis of preparation of financial statements [text block] Basis of presentation Number of share options expired in share-based payment arrangement SARs expired Financial assets and Financial liabilities. Financial Assets and Financial Liabilities Financial assets and Financial liabilities Weighted average ordinary shares used in calculating basic and diluted earnings per share [abstract] Weighted average shares outstanding: Denominator: Converted Options [Member] Converted Options [Member] Converted Options Member Buildings [member] Buildings [Member] Depreciation, right-of-use assets Depreciation, right-of-use assets Prepaid maintenance expenses Prepaid maintenance expenses current and non current Prepaid maintenance expenses current and non current. Disclosure Of Compensation Of Key Management Personnel [Abstract] Social security contributions Social security contributions Performance based options [Member]. Performance Based Options [Member] Performance Based Options [Member] Restricted stock units related expenses Restricted stock units related expenses. Disclosure of classes of share capital [table] Disclosure of classes of share capital [table] Leerink partners llc member. Leerink Partners Llc [Member] Accumulated depreciation and amortisation [member] Accumulated depreciation [Member] Peter Chambre [Member] Peter Chambre [Member] Peter Chambre Member Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [abstract] Expense relating to short-term leases for which recognition exemption has been used Expense relating to short term leases for which recognition exemption has been used Expenses relating to short-term leases Key management personnel compensation, short-term employee benefits Address Type [Domain] Currency translation differences. Currency Translation Differences Currency translation differences Document Annual Report Accrued liabilities. Accrued Liabilities Accrued liabilities Trade payables Trade payables Matching Stock Options [Member] Matching Stock Options [Member] Matching Stock Options Member Disclosure Of Personnel Expenses [Text Block] Disclosure Of Personnel Expenes [Text Block] Summary of Personnel Expenses Tranche One [Member]. Tranche One [Member] Tranche One [Member] Share issued price per share. Share Issued Price per Share Share Issued Price per Share Equity [abstract] Shareholders' equity Shareholder's equity (deficit) Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, liabilities Increase decrease in fair value measurement due to a reasonably possible increase in unobservable input recognized in profit or loss before tax liabilities Borrowings by name [axis] Borrowings by name [axis] Foreign Currency Losses Net Foreign currency losses Foreign currency losses Foreign currency losses net. Event [Axis] Disclosure of detailed information about other current liabilities abstract. Disclosure of detailed information about other current liabilities [Text Block] Summary of other current liabilities Disclosure of detailed information about finance income expense. Disclosure Of Detailed Information About Finance Income Expense [Abstract] Construction [Member] Construction in progress [member] Disclosure of detailed information about intangible assets [table] Disclosure of expenses related to right of use assets and lease liabilities. Disclosure Of Expenses Related To Right Of Use Assets And Lease Liabilities [Table Text Block] Summary of expenses related to right-of-use assets and lease liabilities Document Accounting Standard Revenue that was included in contract liability balance at beginning of period Contract with customers liability revenue recognized Classes of financial instruments [domain] Assets Total assets Assets at beginning of period Assets at end of period Description of accounting policy for going concern. Description Of Accounting Policy For Going concern [Policy Text Block] Going concern Additions other property, plant and equipment. Additions Other Property Plant and Equipment Additions Maximum Number Of Shares Yet To Be Purchased Under Plans Or Program Maximum number of shares yet to be purchased under plans or program. Maximum number (or approximate dollar value) of shares that may yet be purchased under the plans or programs Entity Addresses, Address Type [Axis] Collaboration Agreements [Member] Total Statistical Measurement [Axis] Tax effect of tax losses Tax effect of tax losses Communication and network equipment [member] IT and telecommunication [Member] Disclosure of reconciliation between taxes on income and expected income tax benefit[Text Block]. Disclosure of reconciliation between taxes on income and expected income tax benefit [Table Text Block] Summary of Reconciliation Between Taxes On Income And Expected Income Tax Benefit Change in fair value of warrant liabilities. Change In Fair Value Of Warrant Liabilities Change in fair value of warrant liabilities Bristol myer squib company. Bristol Myer Squib Company [Member] Bristol Myer Squib Company [member] Components Of Equity [Domain] Types of share-based payment arrangements [axis] Prepaid expenses of licenses and software. Prepaid Expenses Of Licenses And Software Prepaid expenses of licenses and software Financial Risk Management Objectives and Policies [Abstract] Financial risk management objectives and policies. Disclosure of financial instruments [text block] Financial Instruments Par value per share Weighted average exercise price of share options outstanding in share-based payment arrangement Weighted average exercise price, Outstanding at December 31, Weighted average exercise price, Outstanding at January 1, Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Interest expense on lease. Interest Expense on Lease Interest expenses form lease Disclosure of quantitative information about right-of-use assets [table] Restricted Stock Units Granted for Grant Date Fair Value Restricted stock units granted for grant date fair value. Restricted stock units granted for grant date fair value Description of accounting policy for deferred income tax [text block] Deferred income tax Service options three [Member]. Service Options Three [Member] Description of transactions with related party Description of Transactions with related party Converted Stock options [Member] Converted Stock options. Number Of Shares Purchased as Part Of Plan Or Program Number of shares purchased as part of plan or program. Total number of shares purchased as part of publicly announced plans or programs Weighted average number of ordinary shares used in calculating diluted earnings per share Weighted average shares outstanding - diluted Diluted Weighted average shares outstanding - diluted Adjustments of profit or loss Adjustments to reconcile profit (loss) Total adjustments to reconcile profit (loss) Disclosure of indirect measurement of fair value of goods or services received, share options granted during period [text block] Summary of Options Granted Priced Using Black Scholes for SARs, Tandem Awards, Converted Options, Matching Stock Options and Monte Carlo Option Pricing Model Key management personnel compensation fixed. Key Management Personnel Compensation Fixed Fixed Non-current assets [abstract] Non-current assets Current trade payables Total Accounts payables Disclosure of finance income (cost) [text block] Financial result Prepaid expenses for services Prepaid expenses for services. Diluted earnings (loss) per share Diluted Earning/(Loss) per share - diluted Total diluted earnings (loss) per share Weighted average exercise price of share options expired in share-based payment arrangement SARs expired Early TCER activities. Early TCER Activities [Member] Entity Registrant Name Potential milestone payment payable. Potential Milestone Payment Payable Potential milestone payment payable Disclosure of trade and other receivable explanatory. Disclosure Of Trade And Other Receivable Explanatory [Table Text Block] Summary of Trade receivables Entity Voluntary Filers Other reserves Statement of changes in equity [table] Service Options Six [Member] Service Options Six [Member] Service options six. Assets recognised from costs to obtain or fulfil contracts with customers Capitalized costs of contract net of amortization Disclosure Of Contractual Obligations [Table] Cybersecurity Risk Management Positions or Committees Responsible [Flag] Statement of comprehensive income [abstract] Disclosure of depreciation expenses. Disclosure Of Depreciation Expenses [Table Text Block] Summary of Depreciation Expense Entity Common Stock, Shares Outstanding Assets and liabilities [domain] Share premium [member] Share premium [Member] Share premium [member] Equity Ending Balance Beginning Balance Total shareholders' equity Total shareholder's equity (deficit) BMS member. BMS [Member] Classes of property, plant and equipment [domain] Milestone payment receivable. Milestone Payment Receivable Milestone payment receivable Tax effect from change in tax rate Difference in tax rates Difference in tax rates Date by which application of new IFRS is required General and administrative expense General and administrative expenses Total retained earnings Retained earnings Accumulated deficit Other finance cost Other financial expenses Trade receivables Equity and liabilities [abstract] Liabilities and shareholders' equity Accumulated impairment [member] Accumulated impairment [Member] Notes and other explanatory information [abstract] Computer equipment [member] Computer equipment [Member] Amendments To Ias Nine [Member] Amendments To Ias Nine. Amendments to IFRS 9 Other finance income Other financial income Patent And Licenses [Member] Patent and licenses. Patent And Licenses [Member] Disclosure of how entity manages liquidity risk [text block] Summary of Liquidity Risk Disclosure of detailed information about property, plant and equipment [table] City Area Code Additional expense Additional expense. Additional expense Description Of Managing Liquidity Risk [Abstract] Auditor Name New IFRSs [axis] Agreement [Axis] Option exercise fee received. Option Exercise Fee Received Option exercise fee received Date of grant of share-based payment arrangement Grant date Purchase of property, plant and equipment, classified as investing activities Payments for property, plant and equipment Research and development expense Research and development expenses Non-current liabilities Total non-current liabilities Statement of cash flows [abstract] Disclosure of depreciation expenses. Disclosure Of Depreciation Expenses [Abstract] Counterparty Name [Domain] Reorganization [Member] Disclosure of revenue from collaboration agreements. Disclosure Of Revenue From Collaboration Agreements [Table] Key management personnel compensation, share-based payment Share-based compensation expenses Percentage on limitation on tax loss carryforwards before prior period. Percentage on Limitation on tax loss carryforwards before prior period Percentage on limitation on tax loss carryforwards before prior period Classes of assets [axis] Non-adjusting events after reporting period [domain] Contract transaction price. Contract Transaction Price Contract transaction price Cash flows from (used in) operating activities [abstract] Cash flows from operating activities Expected volatility, share options granted Volatility Entity Address, Country Leasehold improvements [member] Lease Hold Improvements [Member] Historical volatility for shares, measurement input [Member] Historical volatility for shares, measurement input [member] Foreign exchange rates. Foreign Exchange Rates [Member] Earnings per share [text block] Summary of Earnings and loss per share Adjustment [Member] Increase (decrease) due to corrections of prior period errors [member] Corrections of Prior Period Errors [Member] Cash and Cash Equivalents and Other Financial Assets [Member] Cash and cash equivalents and Other financial assets. Cash and cash equivalents and Other financial assets [Member] Converted Options One [Member] Auditor Location Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [table] Deferred Tax Liabilities Deferred Income Adjustment Deferred tax liabilities deferred income adjustment. Deferred tax liabilities deferred income adjustment Vehicles [member] Vehicles [Member] Other non-current assets Total Major components of tax expense (income) [abstract] Major components of tax expense (income) [abstract] Deferred tax assets Deferred tax assets Deferred tax assets Proceeds from sales of investments other than investments accounted for using equity method Proceeds from maturity of investments classified in Other financial assets Categories of financial liabilities [domain] Disclosure of transactions between related parties [table] Entity Interactive Data Current Immatics N.V and Immatics GmbH. Immatics NV And Immatics GmbH [Member] Immatics N.V and Immatics GmbH [Member] Disclosure of account receivable Explanatory. Disclosure Of Account Receivable Explanatory [Text Block] Accounts receivables Disclosure of reconciliation of changes in intangible assets and goodwill [line items] Trade tax rate Trade Tax Rate Trade tax rate. Financial assets Financial assets, Carrying amount Other financial assets Disclosure of quantitative information about right-of-use assets [text block] Summary of Right-of use assets Disclosure Of Commitments And Contingencies [Abstract] Disclosure Of Commitments And Contingencies. Presentation of leases for lessee [abstract] Percentage of reasonably possible increase in unobservable input, liabilities Percentage of reasonable possible increase in unobservable inputs Amendment to IFRS sixteen [Member]. Amendment To IFRS Sixteen [Member] Amendment to IFRS 16 Disclosure of classes of share capital [abstract] Current warrant liability Liabilities for warrants Issued capital [member] Issued capital [Member] Share capital [member] Government Grants Description of accounting policy for government grants [text block] Later than four years and not later than five years [member] Weighted average remaining contractual life of outstanding share options Weighted average remaining contract life (years) 3 - 5 years [Member] Later than three years and not later than five years [member] Income Statement Location1 [Axis] Income Statement Location1. Local Phone Number Other current liabilities Total Immatics NV [Member] Immatics N.V. [Member] Immatics Nv Member Deferred Asset Netting [Member] Netting [Member] Deferred Asset Netting Member Auditor Opinion [Text Block] Other income Other Income [Abstract]1 Other Income Abstract. Increase Decrease In Profit Loss Before Tax On Basis Of Higher Lower Basis Points. Increase Decrease In Profit Loss Before Tax On Basis Of Higher Lower Basis Points Profit/(loss) Trade and other non-current receivables [abstract] Immatics US, Inc. Immatics US Inc [Member] Immatics US Inc [Member] Employee benefits expense Total Employee benefits expense, Total Total Changes in working capital [Abstract]. Changes In Working Capital [Abstract] Changes in: Service Options Four [Member]. Service Options Four [Member] Unrecorded contingent liability. Unrecorded Contingent Liability Unrecorded contingent liability Translation difference on right of use asset. Translation Difference On Right Of Use Asset Currency translation of  right-of-use assets  Other current. Other Current Other liabilities Adjustments to reconcile profit (loss) [abstract] Adjustments for: Financial Risk Management Objectives and Policies [Table] Financial risk management objectives and policies. Current assets Total current assets Nancy Valente [Member]. Nancy Valente [Member] Nancy Valente [Member] Key management personnel of entity or parent [member] Key management personnel of entity or parent [member] Office equipment and installations. Office Equipment And Installations [Member] Type Of Vesting [Axis] Entity Emerging Growth Company