Cost Gross carrying amount [member] Schedule of Weighted Average Exercise Prices for Options Outstanding Disclosure of Weighted Average Exercise Prices for Options Outstanding [Table Text Block] Disclosure of Weighted Average Exercise Prices for Options Outstanding Subsidiary notes payable Subsidiary Notes Payable [Member] Subsidiary Notes Payable RSU Restricted Share Units (RSU) [Member] Restricted Share Units (RSU) [Member] Loss with respect to associate for which no deferred tax asset is recognized Rate of loss with respect to associate for which no deferred tax asset is recognized, reconciliation of effective tax rate Rate of loss with respect to associate for which no deferred tax asset is recognized, reconciliation of effective tax rate Subsidiary operating companies Subsidiary operating companies [Abstract] Subsidiary operating companies Treasury Shares Treasury shares [member] Bristol Myers Squibb Bristol Myers Squibb [Member] Bristol Myers Squibb Non-current liabilities Non-current liabilities [abstract] Income Tax Type [Axis] Income Tax Type [Axis] Income Tax Type Investment, Name [Domain] Investment, Name [Domain] Operating Segments Description of accounting policy for segment reporting [text block] Share-based payment expense Key management personnel compensation, share-based payment Ranges of exercise prices for outstanding share options Ranges of exercise prices for outstanding share options [member] 0.01 Exercise Price Range One [Member] Exercise Price Range One [Member] Investments held at fair value Beginning balance Ending balance Non-current financial assets at fair value through profit or loss Gain/(loss) from change in fair value of convertible debt Gain/(Loss) from change in fair value of convertible debt Gain/(Loss) from change in fair value of convertible debt Depreciation and amortization Adjustments for depreciation and amortisation expense Nondeductible compensation Executive compensation, reconciliation of effective tax rate Executive compensation, reconciliation of effective tax rate Salaries and wages Wages and salaries Realized loss on sale of investments Adjustments for losses (gains) on disposal of non-current assets Tax Effected Tax Effected [Member] Tax Effected Within Three Months Within Three Months [Member] Within Three Months Expected terms (in years) Option life, share options granted Trade payables Current trade payables Disclosure of financial liabilities [line items] Disclosure of financial liabilities [line items] Director Director [Member] Entrega and Vedanta Entrega and Vedanta [Member] Entrega and Vedanta Total minimum liquidation preference Minimum liquidation preference Minimum liquidation preference Other Other inflows (outflows) of cash, classified as financing activities Impairment of investment in associates Impairment of investment in associates Impairment Impairment loss recognised in profit or loss Final fee, percentage of original principal amount outstanding Debt instrument, payment terms, final fee, percentage of original principal amount outstanding Debt instrument, payment terms, final fee, percentage of original principal amount outstanding Weighted average grant date fair value, RSU vested (in GBP per share) Weighted average grant date fair value of other equity instruments Vested in share-based payment arrangement Weighted average grant date fair value of other equity instruments Vested in share-based payment arrangement Transferred over time Goods or services transferred over time [member] Proceeds from maturity of short-term investments Proceeds from sales or maturity of financial instruments, classified as investing activities Disclosure of non-adjusting events after reporting period [line items] Disclosure of non-adjusting events after reporting period [line items] Range [axis] Range [axis] Restricted Share Units Restricted share units [member] General and administrative General And Administrative [Member] General And Administrative Equity - 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Imbrium Therapeutics L.P. [Member] Imbrium Therapeutics L.P. Non-controlling interests Profit (loss), attributable to non-controlling interests Number of options held (in shares) Number of Options held Number of Options held Subsidiary Preferred Shares [Abstract] Subsidiary Preferred Shares [Abstract] Subsidiary Preferred Shares [Abstract] Share-based Payments Table [Line Items] Share-based Payments Table [Line Items] Share-based Payments Table Property and Equipment Disclosure of property, plant and equipment [text block] Property, plant and equipment [Table] Disclosure of detailed information about property, plant and equipment [table] Disclosure of non-adjusting events after reporting period [table] Disclosure of non-adjusting events after reporting period [table] Risks Risks [member] Subsidiary preferred shares Subsidiary Preferred Shares [Member] Subsidiary Preferred Shares Investment in Sonde - deconsolidation Investments In Associates Accounted For Using Equity Method, Increase From Deconsolidation Investments In Associates Accounted For Using Equity Method, Increase From Deconsolidation Profit or loss [abstract] Schedule of Investments Held at Fair Value Summary Of Investments Held At Fair Value [Table Text Block] Summary Of Investments Held At Fair Value Top of range Top of range [member] Title of 12(b) Security Title of 12(b) Security Disclosure of disaggregation of revenue from contracts with customers [table] Disclosure of disaggregation of revenue from contracts with customers [table] Other income/(expense) Other gains (losses) Conversion of subsidiary convertible note into preferred share liabilities Conversion of subsidiary Convertible note into preferred share liabilities Conversion of subsidiary Convertible note into preferred share liabilities Proceeds from sale of equity investment Proceeds From Sale Of Equity Investment Proceeds From Sale Of Equity Investment Other general and administrative expenses Other Selling General And Administrative Expense 1 Other Selling General And Administrative Expense 1 Trade and other payables Adjustments for increase (decrease) in trade accounts payable Weighted average stock price of share options exercised in share-based payment arrangement (in GBP per share) Weighted average stock price of share options exercised in share-based payment arrangement Weighted average stock price of share options exercised in share-based payment arrangement More than 10 years Later than ten years [member] Investment percentage related to common share Investment Percentage Related To Common Share Investment Percentage Related To Common Share Controlled founded entities Controlled Founded Entities Controlled Founded Entities [Member] Controlled Founded Entities Interest expense on lease liability Interest expense Interest expense on lease liabilities Changes in the value of subsidiary preferred shares [Table] Changes in the value of subsidiary preferred shares [Table] Changes in the value of subsidiary preferred shares [Table] Gain/(loss) on dilution of ownership interest in associates Gain (Loss) Recognized On Dilution Of Ownership Interest In Associate, Without Earn-out Shares Gain (Loss) Recognized On Dilution Of Ownership Interest In Associate, Without Earn-out Shares Weighted Average Options forfeited [Line Items] Weighted Average Options forfeited [Line Items] Weighted Average Options forfeited Lighthouse Capital Partners VI, L.P Lighthouse Capital Partners VI, L.P [Member] Lighthouse Capital Partners VI, L.P One to two years Later than one year and not later than two years [member] Statistical Measurement [Axis] Statistical Measurement [Axis] Interest income from financial assets Interest Income From Financial Assets Interest Income From Financial Assets Subsidiary Preferred Shares Disclosure of Subsidiary Preferred Shares [Text Block] Disclosure of Subsidiary Preferred Shares Non-Controlling Interests [Abstract] Non-Controlling Interests [Abstract] Non-Controlling Interests [Abstract] Entity Interactive Data Current Entity Interactive Data Current Expected volatility Expected volatility, share options granted Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets Basis of Measurement Description Of Accounting Policy For Basis of Measurement [Policy Text Block] Description Of Accounting Policy For Basis of Measurement Receipt of cash from sale of future royalties Proceeds From Sale Of Future Royalties Proceeds From Sale Of Future Royalties Dr Robert Langer Dr Robert Langer [Member] Dr Robert Langer Comprehensive income/(loss) attributable to: Comprehensive income attributable to [abstract] Level 1 of fair value hierarchy Level 1 of fair value hierarchy [member] Sale Of Future Royalties Liability [Table] Sale Of Future Royalties Liability [Table] Sale Of Future Royalties Liability [Table] Number of entities established Number Of Entities Established Number Of Entities Established Jefferies International Limited Jefferies International Limited [Member] Jefferies International Limited Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Equity - Acquired Share capital PureTech LLC [Table] Equity - Acquired Share capital PureTech LLC [Table] Equity - Acquired Share capital PureTech LLC [Table] Leases - Rental [Line Items] Leases - Rental [Line Items] Leases - Rental [Line Items] Owners of the Group Profit (loss), attributable to owners of parent Schedule of Stock Option Activity Disclosure of number and weighted average exercise prices of share options [text block] Loss – change in fair value through profit and loss Increase (decrease) in fair value measurement, assets Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Revaluation of deferred due to rate change Tax Rate Effect Of Adjustments Related To Change In Blend State Rate Tax Rate Effect Of Adjustments Related To Change In Blend State Rate Proposed capital return amount Proposed Capital Return Amount Proposed Capital Return Amount Counterparty Name [Axis] Counterparty Name [Axis] Schedule of Cost and Accumulated Amortization of Intangible Assets Disclosure of detailed information about intangible assets [text block] Non-adjusting events after reporting period Non-adjusting events after reporting period [member] Percentage of voting equity interests acquired Percentage of voting equity interests acquired Financial Instruments [Abstract] Financial Instruments [Abstract] Financial Instruments [Abstract] Operating loss carryforwards not subject to expiration Operating Loss Carryforwards Not Subject To Expiration [Member] Operating Loss Carryforwards Not Subject To Expiration Number of days after debt incurred from a certain investor Debt Instrument, Payment Term, Number Of Days After Debt Incurred From A Certain Investor Debt Instrument, Payment Term, Number Of Days After Debt Incurred From A Certain Investor Schedule of Quantitative Information About Right-of-use Assets and Lease Liability Disclosure of quantitative information about right-of-use assets [text block] Disclosure of Maturity Analysis of Operating Lease Payments [Table] Disclosure of maturity analysis of operating lease payments [table] Total Auditor's remuneration Auditor Location Auditor Location Note receivable Note Receivable [Member] Note Receivable Class B common Class B Common [Member] Class B Common Group's share in net losses - limited to net investment amount Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method Share-based Payment Expense Category [Axis] Share-based Payment Expense Category [Axis] Share-based Payment Expense Category Voting percentage through the holdings Proportion of voting rights held in subsidiary Taxation Disclosure of income tax [text block] Classes of financial instruments [axis] Classes of financial instruments [axis] Schedule of 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Deconsolidation of Subsidiary Increase (decrease) through change in equity of subsidiaries, equity One year to Five Years Later than one year and not later than five years [member] Aggregated measurement Aggregated measurement [member] Share Capital Description of accounting policy for issued capital [text block] Supplemental disclosure of non-cash investment and financing activities: Supplemental disclosure of non-cash investment and financing activities [Abstract] Supplemental disclosure of non-cash investment and financing activities Weighted average exercise price, options forfeited and expired (in GBP per share) Weighted Average Exercise Price Of Share Options Forfeited And Expired In Share-based Payment Arrangement Weighted Average Exercise Price Of Share Options Forfeited And Expired In Share-based Payment Arrangement Accumulated amortization Accumulated depreciation and amortisation [member] Useful life measured as period of time, property, plant and equipment Useful life measured as period of time, property, plant and equipment Operating Loss Carryforwards, Expiration Periods [Domain] Operating Loss Carryforwards, Expiration Periods [Domain] Operating Loss Carryforwards, Expiration Periods Ensof Biosystems, Inc. (held indirectly through Enlight) Ensof Biosystems Inc [Member] Ensof Biosystems Inc Underlying stock price (GBP) (in GBP per share) Share price at grant date Weighted average share price, share options granted Lease liability Lease liabilities [member] Operating expenses: Operating Expense [Abstract] Operating Expense Royalty income Royalty income Significant Subsidiary Plans [Table] Significant Subsidiary Plans [Table] Significant Subsidiary Plans [Table] Segments Segments [member] Net cash provided by (used in) financing activities Cash flows from (used in) financing activities Interest expense on other borrowings Interest expense on borrowings Purchases of short-term investments Purchase of financial instruments, classified as investing activities Dr Bharatt Chowrira Dr Bharatt Chowrira [Member] Dr Bharatt Chowrira Schedule of Detailed Information about Borrowings Disclosure of detailed information about borrowings [text block] Amounts received at closing Royalties Liabilities, Initial Payment Received At Closing Royalties Liabilities, Initial Payment Received At Closing Financial assets Financial assets, at fair value Balance at beginning of period Balance at end of period Financial assets, at fair value Weighted Average Options granted [Line Items] Weighted Average Options granted [Line Items] Weighted Average Options granted Schedule of Estimated Useful Life of Assets Disclosure Of Estimated Useful Life Of Assets [Table Text Block] Disclosure Of Estimated Useful Life Of Assets Schedule of Accumulated Depreciation and Impairment Loss Disclosure of accumulated depreciation and impairment loss [Table Text Block] Disclosure of accumulated depreciation and impairment loss 1.00 to 2.00 Exercise Price Range Two [Member] Exercise Price Range Two [Member] Related party transactions [Table] Related party transactions [Table] Related party transactions Depreciation Depreciation Depreciation, right-of-use assets Share of net income/(loss) of associates accounted for using the equity method Share of net loss of associates accounted for using the equity method Share in net loss of associates Share of profit (loss) of associates and joint ventures accounted for using equity method Interest rate, interest only period Borrowings, Interest Only Period, Interest Rate Borrowings, Interest Only Period, Interest Rate Share-based payments Share-based payments [Member] Share-based payments Current liabilities from share based payment transactions Current Liabilities From Share based Payment Transactions Current Liabilities From Share based Payment Transactions Fair value of warrants Fair Value Of Warrants Fair Value Of Warrants Other reserve Other reserves [member] Long-term loan Non-current portion of non-current borrowings Share-based Payment Expense [Abstract] Share-based Payments [Abstract] Share-based Payments [Abstract] Basis of consolidation Description Of Accounting Policy For Basis Of Consolidation [Policy Text Block] Description Of Accounting Policy For Basis Of Consolidation Sale of Future Royalties Liability Description Of Accounting Policy For Sale Of Future Royalties Liability [Policy Text Block] Description Of Accounting Policy For Sale Of Future Royalties Liability Deductible temporary difference Deductible temporary differences for which no deferred tax asset is recognised Purchase of intangible assets not yet paid in cash Purchase Of Intangible Assets But Not Yet Paid Purchase Of Intangible Assets But Not Yet Paid Volatility Historical volatility for shares, measurement input [member] Unobservable inputs Unobservable inputs [member] Fair value of equity investment Fair Value Of Equity Investment After Deconsolidation Fair Value Of Equity Investment After Deconsolidation Interest received Interest received, classified as operating activities Classes of financial liabilities [axis] Classes of financial liabilities [axis] Appeering Inc. Appeering Appeering [Member] Appeering Lease liability, number of renewal options Lease Liability, Number Of Renewal Periods Lease Liability, Number Of Renewal Periods Financial liabilities, class Financial liabilities, class [member] Nontrading holding companies Nontrading Holding Companies [Member] Nontrading Holding Companies Computer equipment and software Computer equipment [member] Total other comprehensive income/(loss) Other comprehensive income/(loss), net Other comprehensive income Auditor Information [Abstract] Auditor Information PureTech LYT, Inc. (formerly Ariya Therapeutics, Inc.) PureTech LYT [Member] PureTech LYT American Depositary Shares American Depositary Shares [Member] American Depositary Shares Major Equity Investment Major Equity Investment [Member] Major Equity Investment Deferred Tax Assets and Liabilities [Line Items] Deferred Tax Assets and Liabilities [Line Items] Deferred Tax Assets and Liabilities Deconsolidation (in shares) Number Of Share Options Deconsolidated In Share-based Payment Arrangement Number Of Share Options Deconsolidated In Share-based Payment Arrangement Inactive subsidiaries Inactive Subsidiaries [Member] Inactive Subsidiaries Lease liability, non-current Long-term portion of lease liability Non-current lease liabilities Entity Emerging Growth Company Entity Emerging Growth Company Sale of investment held at fair value Sale Of Investment Held At Fair Value [Member] Sale Of Investment Held At Fair Value Gelesis Holdings Inc. Gelesis Holdings Inc. [Member] Gelesis Holdings Inc. Amortization of deferred gain Gains (Losses) Arising From Difference Between Fair Value And Transaction Price Of Derivative Assets Through Profit Or Loss Gains (Losses) Arising From Difference Between Fair Value And Transaction Price Of Derivative Assets Through Profit Or Loss Enlight Biosciences, LLC Enlight Enlight [Member] Enlight Available Funds Statement of financial position [abstract] Convertible Notes [Line Items] Convertible Notes [Line Items] Convertible Notes Discount, conversion from notes - non qualified financing Discount, conversion from notes - non qualified financing Discount, conversion from notes - non qualified financing Classes of share capital [axis] Classes of share capital [axis] Investment in Associates Investments in associates [Member] Investments in associates Net finance income/(costs) Net finance income/(costs) Finance income (cost) Subsidiary Notes Payable - Loans [Line Items] Subsidiary Notes Payable - Loans [Line Items] Subsidiary Notes Payable - Loans Intangible Assets Disclosure of detailed information about intangible assets [line items] Ranges Ranges [member] Acquisition of equity instruments in other entities Acquisition of equity instruments in other entities Acquisition of equity instruments in other entities Sensitivity analysis for equity price risk, impact on pre-tax earnings Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Pre-Tax Earnings Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Pre-Tax Earnings Deconsolidated former subsidiary operating companies Deconsolidated former Subsidiary Operating Companies [Member] Deconsolidated former Subsidiary Operating Companies Entity Address, Postal Zip Code Entity Address, Postal Zip Code Weighted Average Options forfeited [Table] Weighted Average Options forfeited [Table] Weighted Average Options forfeited [Table] Revenue [Line Items] Revenue [Line Items] Revenue Disclosure of information of employees [Line Items] Disclosure of information of employees [Line Items] Disclosure of information of employees [Line Items] Libra Biosciences, Inc. Libra Biosciences Inc [Member] Libra Biosciences Inc Types of risks [axis] Types of risks [axis] Schedule of Range of Exercise Prices of Outstanding Share Options Disclosure of range of exercise prices of outstanding share options [text block] Borrowings by name [axis] Borrowings by name [axis] Nonexecutive Directors Nonexecutive Directors [Member] Nonexecutive Directors Cash derecognized upon loss of control over subsidiary (see table below) Cash In Deconsolidated Subsidiary Cash In Deconsolidated Subsidiary Accounts receivables related to contract revenue Receivables from contracts with customers Non-controlling interests Comprehensive income, attributable to non-controlling interests PureTech Securities Corp. PureTech Securities Corp. [Member] PureTech Securities Corp. Minimum Minimum [Member] Total finance costs - non cash interest expense related to sale of future royalties Non cash interest expense recognized Noncash Interest Expense, Royalty Liability Noncash Interest Expense, Royalty Liability Purchase of investments held at fair value Cash purchase of Vor preferred shares Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities Fair value gain on other financial instruments Adjustments For Gains (Losses) On Change In Fair Value Of Other Financial Instruments Adjustments For Gains (Losses) On Change In Fair Value Of Other Financial Instruments New Standards and Interpretations Disclosure of changes in accounting policies [text block] Lease Contractual Term [Domain] Lease Contractual Terms [Domain] Lease Contractual Term [Domain] Exercise of call options, maximum number of common stocks to be purchased (in shares) Exercise Of Call Options, Maximum Number Of Common Stocks To Be Purchased 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lease incentives Leasehold improvements purchased through lease incentives Share-based Payments Table [Table] Share-based Payments Table [Table] Share-based Payments Table [Table] NCI exercise of stock options in subsidiary Proceeds From Issue Of shares to NCI Proceeds From Issue Of shares to NCI Schedule of Accumulated Amortization Disclosure of Accumulated amortization [Table Text Block] Disclosure of Accumulated amortization Customer C Customer C [Member] Customer C Unrecognized deferred tax assets [Line Items] Unrecognized deferred tax assets [Line Items] Unrecognized deferred tax assets [Line Items] Conversion to subsidiary preferred shares Conversion to preferred Conversion to preferred Shares repurchased under share repurchase program (in shares) Stock Repurchase Program, Number Of Shares Repurchased Stock Repurchase Program, Number Of Shares Repurchased Share-based payment arrangements Share-based payment arrangements [member] Presentation of leases for lessee [abstract] Schedule of Revenue Disclosure of revenue from contracts with customers [text block] Expected dividend yield Expected dividend, share options granted Related party transactions [abstract] Related party transactions [abstract] Stock repurchase program, purchase price per share Stock Repurchase Program, Purchase Price Per Share Stock Repurchase Program, Purchase Price Per Share Stock-based compensation Rate of Share based Payment expenses, non-deductible, reconciliation of effective tax rate Rate of Share based Payment expenses, non-deductible Deferred tax assets (liabilities), net, not recognized Total Net deferred tax assets, not recognised Net deferred tax assets, not recognised Types of customers Types of customers [member] Schedule of Weighted Average Exercise Prices for Options Granted Disclosure of Weighted Average Exercise Prices for Options Granted [Table Text Block] Disclosure of Weighted Average Exercise Prices for Options Granted Total revenue Revenue Revenue Payroll taxes Payroll Taxes Payroll Taxes Unrecognised share of losses of associates, other comprehensive loss Unrecognised Share Of Losses Of Associates, Other Comprehensive Loss Unrecognised Share Of Losses Of Associates, Other Comprehensive Loss Subsidiary Notes Payable [Abstract] Subsidiary Notes Payable [Abstract] Subsidiary Notes Payable [Abstract] Depreciation Depreciation expense Schedule of Liquidity Risk Disclosure of liquidity risk [text block] Issuance of subsidiary preferred Shares Proceeds from issue of preference shares Gain – change in fair value through profit and loss Gain/(loss) on changes in fair value Gains (losses) recognised in profit or loss excluding exchange differences, fair value measurement, assets Weighted average remaining contractual life of options excisable Weighted average remaining contractual life of options excisable Weighted average remaining contractual life of options excisable Document Transition Report Document Transition Report Statement Of Cash Flows [Table] Statement Of Cash Flows [Table] Statement Of Cash Flows [Table] Liquidity Risk [Line Items] Liquidity Risk [Line Items] Liquidity Risk Property and equipment, net Property, plant and equipment [member] Granted (in shares) Number of other equity instruments granted in share-based payment arrangement Entity's total for related parties Entity's total for related parties [member] Disclosure of detailed information about intangible assets [table] Disclosure of detailed information about intangible assets [table] Share premium Share premium [member] Gain/(loss) on foreign currency exchange Gain Loss on foreign currency exchange in finance costs Gain Loss on foreign currency exchange in finance costs Vor Biopharma Inc. Vor Vor [Member] Vor Current tax expense Total current income tax expense/(benefit) Current tax expense (income) Entity Address, Country Entity Address, Country Realized gain/(loss) on sale of investments Gains (losses) on disposals of investments Gain/(loss) on deconsolidation of subsidiary Gain on deconsolidation Gains (losses) recognised when control of subsidiary is lost Gross Amount Gross Amount [Member] Gross Amount Diluted earnings/(loss) per share (in dollars per share) Diluted earnings (loss) per share Series A financing, amount Proceeds From Financing Activity, Amount Proceeds From Financing Activity, Amount Non-Controlling Interests [Table] Non-Controlling Interests [Table] Non-Controlling Interests Long-term loan [Abstract] Long-term loan [Abstract] Investment in Gelesis 2023 Warrants Issues, Fair Value Measurement, Warrant Issues, Fair Value Measurement, Warrant Issuance of Subsidiary Convertible Note Proceeds from issue of bonds, notes and debentures Karuna, Vor and Akili Karuna, Vor and Akili [Member] Karuna, Vor and Akili Percentage of reasonably possible decrease in unobservable input, assets Percentage of reasonably possible decrease in unobservable input, assets Number of research Number Of Research Number Of Research Recognised Income Tax Expense [Table] Recognised Income Tax Expense [Table] Recognised Income Tax Expense [Table] Sensitivity range, decrease Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Period Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Decrease In Risk Variable, Period Contractual interest expense on notes payable Contractual Interest expense on notes Contractual Interest expense on notes Award settlement, price per share Share-Based Compensation Arrangement By Share-Based Payment Award, Award Settlement, Price Per Share Share-Based Compensation Arrangement By Share-Based Payment Award, Award Settlement, Price Per Share Document Financial Statement Error 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over 10% of revenue Customers [member] Investments held at fair value [Table] Investments held at fair value [Table] Investments held at fair value Segments [axis] Segments [axis] Intangible Assets Description of accounting policy for intangible assets other than goodwill [text block] Subsidiary Plans [Table] Subsidiary Plans [Table] Subsidiary Plans [Table] Percentage ownership interest Proportion of ownership interest in associate Document Period End Date Document Period End Date Schedule of Recognized Income Tax Expense Disclosure of recognized income tax expense [Table Text Block] Disclosure of recognized income tax expense Related Parties Transactions Disclosure of transactions between related parties [text block] Weighted average remaining contractual life of outstanding share options Weighted average remaining contractual life of outstanding share options 2.00 to 3.00 Exercise Price Range Three [Member] Exercise Price Range Three [Member] Accounting Policies Accounting Policies [Line Items] Accounting Policies Weighted-average exercise price, beginning of year (in GBP per share) Weighted-average exercise price, end of year (in GBP per share) Wtd Average Exercise Price (in GBP per share) Weighted-average exercise price (in dollars per share) Weighted average exercise price of share options outstanding in share-based payment arrangement Expiring term after issuance Warrants, Expiration Term Warrants, Expiration Term Tax losses Tax losses expiring Unused tax losses for which no deferred tax asset recognised Vedanta and Sonde Vedanta And Sonde [Member] Vedanta And Sonde PureTech and third-party PureTech and third-party [Member] PureTech and third-party Non-Controlling Interests [Line Items] Non-Controlling Interests [Line Items] Non-Controlling Interests Business combinations [axis] Business combinations [axis] Minimum liquidation preference [Table] Minimum liquidation preference [Table] Minimum liquidation preference [Table] Gain/(loss) from change in fair value of warrant liability Gain/(Loss) from change in fair value of warrant liability Gain/(Loss) from change in fair value of warrant liability Schedule of Finance Income (Cost) Disclosure of finance income (cost) [text block] Other Other inflows (outflows) of cash, classified as operating activities PureTech Management, Inc. PureTech Management [Member] PureTech Management Investments in associates accounted for using equity method Investments in associates accounted for using equity method Finance Income/(Costs), net Disclosure of finance cost [text block] Taxation [Table] Taxation [Table] Taxation Unrecognized deferred tax asset Tax rate effect of tax losses Property and equipment, net Property, plant and equipment, net Balance at beginning of period Balance at end of period Property, plant and equipment Market Backsolve & OPM Market Backsolve & OPM [Member] Market Backsolve & OPM Merger reserve Merger reserve Exercise of stock options (in shares) Increase (decrease) in number of ordinary shares issued Audit of the financial statements of subsidiaries Audit of financial statements of subsidiaries Audit of financial statements of subsidiaries Net increase (decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Cash paid for rent - interest Cash outflow for leases Entity's total for subsidiaries Entity's total for subsidiaries [member] Preferred A-1 Shares Preferred A-1 Shares [Member] Preferred A-1 Shares Other Other tax rate effects for reconciliation between accounting profit and tax expense (income) Short-term employee benefits Key management personnel compensation, short-term employee benefits Schedule of Reconciliation of Effective Tax Rate Disclosure of Reconciliation of Effective Tax Rate [Table Text Block] Disclosure of Reconciliation of Effective Tax Rate Interest income Interest income on loans and receivables Associates [axis] Associates [axis] Weighted average grant date fair value, RSU forfeited (in GBP per share) Weighted average grant date fair value of other equity instruments forfeited in share-based payment arrangement Weighted average grant date fair value of other equity instruments forfeited in share-based payment arrangement Deferred tax assets Deferred tax assets Income tax payable Trade and other payables Income Tax Payable Income Tax Payable Mandara Sciences, LLC Mandara Sciences LLC [Member] Mandara Sciences LLC Schedule of Operating Expenses Disclosure Of Total Operating Expense Explanatory [Table Text Block] Disclosure Of Total Operating Expense Explanatory Schedule of Payroll Costs Disclosure of Payroll Costs [Table Text Block] Disclosure of Payroll Costs Forfeited (in shares) Number of share options forfeited (in shares) Number of share options forfeited in share-based payment arrangement Disclosure of disaggregation of revenue from contracts with customers [line items] Disclosure of disaggregation of revenue from contracts with customers [line items] Tax credits Tax credits expiring Unused tax credits for which no deferred tax asset recognised Reclassifications Increase (decrease) through transfers from construction in progress, property, plant and equipment Share-based payment arrangements, percentage of common shares outstanding Share-based Payment Arrangements, Authorized Amount, Percentage of Common Shares Outstanding Share-based Payment Arrangements, Authorized Amount, Percentage of Common Shares Outstanding Schedule of Sale of Future Royalties Liability Schedule Of Royalty Liabilities [Table Text Block] Schedule Of Royalty Liabilities Sale of investments held at fair value Other cash receipts from sales of equity or debt instruments of other entities, classified as investing activities Establishment of new entities Establishment Of New Entities [Member] Establishment Of New Entities Weighted average exercise price, options exercised (in GBP per share) Weighted average exercise price of share options exercised in share-based payment arrangement Balance at beginning of period Balance at end of period Financial liabilities Financial liabilities, at fair value Gain/(loss) from change in fair value of preferred shares Gain/(Loss) from change in fair value of preferred shares Gain/(Loss) from change in fair value of preferred shares Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, assets Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, assets Statement of cash flows [abstract] Grant Revenue Description of accounting policy for government grants [text block] Prepaid expenses Prepaid assets Current prepaid expenses Operating Expense Category [Axis] Operating Expense Category [Axis] Operating Expense Category Total comprehensive income/(loss) for the year Comprehensive income Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash and cash equivalents Change in fair value Change in fair value Change in fair value Document Annual Report Document Annual Report Warrants fair value Warrants, Fair Value Warrants, Fair Value Total non-current liabilities Non-current liabilities Non-current liabilities Exercised (in shares) Number of share options exercised (in dollars per share) Number of share options exercised in share-based payment arrangement Cover [Abstract] Receivables due from related parties Receivables due from related parties Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [table] Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [table] Total assets Assets US UNITED STATES Financial Instruments - Fair value Measurement and Classification [Line Items] Financial Instruments - Fair value Measurement and Classification [Line Items] Financial Instruments - Fair value Measurement and Classification Termination Benefits Key management personnel compensation, termination benefits Capstar Capstar [Member] Capstar Investment in associates – equity method Beginning balance Ending balance Investments in associates reported in separate financial statements Convertible Notes [Table] Convertible Notes [Table] Convertible Notes [Table] Lease liability, subleased area (in square feet) Lease Liability, Subleased Area Lease Liability, Subleased Area Translation reserve Reserve of exchange differences on translation [member] Aggregate principal amount Notional amount Finance costs Finance costs [Abstract] Finance costs Other assets and liabilities, net Other Assets And Liabilities, Net Other Assets And Liabilities, Net Leases - Rental [Table] Leases - Rental [Table] Leases - Rental [Table] Subsidiary Types [Domain] Subsidiary Types [Domain] Subsidiary Types [Domain] Cash flows from financing activities: Cash flows from (used in) financing activities [abstract] Depreciation Depreciation, property, plant and equipment Disclosure of financial liabilities [abstract] Share Capital Issued capital [member] Two to three years Later than two years and not later than three years [member] Functional and Presentation Currency Description of accounting policy for functional currency [text block] Business combination, additional shares to be received at no additional cost, fair value Business Combination, Additional Shares To Be Received At No Additional Cost, Fair Value Business Combination, Additional Shares To Be Received At No Additional Cost, Fair Value Entity Current Reporting Status Entity Current Reporting Status Receivables due from associates Receivables due from associates Increase through conversion of convertible instruments, equity Increase (decrease) through conversion of convertible instruments, equity Retained earnings Retained earnings/(accumulated deficit) Retained earnings Consideration for acquired non-controlling interest, first installment Consideration for acquired non-controlling interest, first installment Consideration for acquired non-controlling interest, first installment Weighted average number of ordinary shareholders to calculate basic earnings per share (in shares) Weighted average number of ordinary shares used in calculating basic earnings per share Investments held at fair value [Line Items] Investments held at fair value [Line Items] Investments held at fair value Right of use assets Right-of-use assets [member] Investments held at fair value Investments held at fair value [Member] Investments held at fair value Operating tax losses Unused tax losses [member] Debt instrument, payment terms, final fee trigger amount Debt instrument, payment terms, final fee trigger amount Debt instrument, payment terms, final fee trigger amount Acquisition cost Acquisition cost Acquisition cost Revaluation of deferred due to rate change Adjustments Related To Change In Blend State Rate Adjustment Related To Change In Blend State Rate Settlement of restricted stock units (in shares) Number Of Ordinary Shares Issued To Settle Share-based Payment Awards Number Of Ordinary Shares Issued To Settle Share-based Payment Awards Disclosure of terms and conditions of share-based payment arrangement [line items] Disclosure of terms and conditions of share-based payment arrangement [line items] Current receivable due from associates, interest rate Current Receivable Due From Associates, Interest Rate Current Receivable Due From Associates, Interest Rate Percent voting rights Percent voting rights of the Company Percent voting rights of the Company Percent voting rights of the Company Schedule of Income Taxes Recognized in Comprehensive Income Disclosure of Income Taxes Recognized in Comprehensive Income [Table Text Block] Disclosure of Income Taxes Recognized in Comprehensive Income Subsidiary Preferred Shares [Line Items] Subsidiary Preferred Shares [Line Items] Subsidiary Preferred Shares Schedule of Equity Summary of Equity [Table Text Block] Summary of Equity Types of customers [axis] Types of customers [axis] Schedule of Key Management Personnel Compensation Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [text block] State taxes, net of federal effect Effects of state tax rate in US, reconciliation of effective tax rate Effects of state tax rate in US, reconciliation of effective tax rate Taxation [Line Items] Taxation [Line Items] Taxation Current liabilities Current liabilities [abstract] Entity Voluntary Filers Entity Voluntary Filers Material Accounting Policies Disclosure of material accounting policy information [text block] Statistical Measurement [Domain] Statistical Measurement [Domain] Performance, market and service based RSU Performance, market and service based RSU [Member] Performance, market and service based RSU Disclosure of detailed information about intangible assets [abstract] Purchase of short-term note from associate Payment To Acquire Short-term Notes Receivable From Associate Payment To Acquire Short-term Notes Receivable From Associate Income taxes paid Income taxes paid (refund), classified as operating activities Consideration paid (received) Consideration paid (received) Net assets (deficit) attributable to shareholders of Gelesis Inc. Net assets attributable to shareholders of associate Net assets attributable to shareholders of associate Share capital Share capital [member] Business combination, number of shares received for additional cost (in shares) Business Combination, Number Of Shares Received Business Combination, Number Of Shares Received Directors and Senior Managers Shareholdings and Share Incentive awards [Table] Directors and Senior Managers Shareholdings and Share Incentive awards [Table] Directors and Senior Managers Shareholdings and Share Incentive awards PureTech Securities II Corp. PureTech Securities II Corp. [Member] PureTech Securities II Corp. Equity Value Equity Value, Measurement Input [Member] Equity Value, Measurement Input Deconsolidation of subsidiaries Decrease through loss of control of subsidiary, property, plant and equipment Operating income/(loss) Profit (loss) from operating activities Disclosure of financial assets [line items] Disclosure of financial assets [line items] Amortization Amortisation, intangible assets other than goodwill Total operating expense Total operating expenses Operating expense Types of financial assets [axis] Types of financial assets [axis] Investment, Name [Axis] Investment, Name [Axis] Share purchase price (in dollars per share) Share price of investee shares Share price of investee shares 2023 Performance Share Plan 2023 Performance Share Plan [Member] 2023 Performance Share Plan Issued ordinary shares at January 1 (in shares) Number of shares outstanding Taxation Income tax expense/(benefit) Income tax expense/(benefit) Income tax expense/(benefit) Tax expense (income) Total other operating expenses Miscellaneous other operating expense Settlement of restricted stock units through issuance of equity Ordinary Shares Issued To Settle Share-based Payment Awards Ordinary Shares Issued To Settle Share-based Payment Awards Total Business Or Sourcing Company Total Business Or Sourcing Company [Member] Total Business Or Sourcing Company Proportion of ownership interests held by non-controlling interests Proportion of ownership interests held by non-controlling interests Number of shares held (in shares) Number Of Shares Held Number Of Shares Held Expired During the Year Number of share options expired in share-based payment arrangement Vedanta Vedanta [Member] Vedanta Disclosure of associates [Line Items] Disclosure of associates [Line Items] Disclosure of associates Non-current assets Non-current assets [abstract] Non-cancellable contractual commitments Contractual capital commitments Consideration for acquired non-controlling interest Consideration for acquired non-controlling interest Consideration for acquired non-controlling interest Dr John LaMattina (individually) Dr John LaMattina (individually) [Member] Dr John LaMattina (individually) Subsidiary preferred shares and warrants Issued capital, preference shares Use of Judgments and Estimates Description Of Accounting Policy For Use Of Judgement And Estimates [Policy Text Block] Description Of Accounting Policy For Use Of Judgement And Estimates Stock options Stock Options [Member] Stock Options Interest rate types [member] Interest rate types [member] Commitments And Contingencies [Abstract] Commitments And Contingencies [Abstract] Gross principal - issuance of notes - financing activity Gross Principal Gross Principal Interest rate, repayment period Borrowings, Repayment Period, Interest Rate Borrowings, Repayment Period, Interest Rate Reclassification of equity settled awards to liability awards Increase Decrease in reclassification of equity settled awards into liability awards Increase Decrease in reclassification of equity settled awards into liability awards Liability for share-based awards Noncurrent Liabilities From Share based Payment Transactions Noncurrent Liabilities From Share based Payment Transactions 2015 Performance Share Plan 2015 Performance Share Plan [Member] 2015 Performance Share Plan Trade and other receivables Trade and other receivables Trade and other current receivables Average effective tax rate Average effective tax rate Finance income/(costs) – fair value accounting Rate of finance income costs - fair value accounting, reconciliation of effective tax rate Rate of finance income costs - fair value accounting, reconciliation of effective tax rate Earnings/(Loss) per Share Disclosure of earnings per share [text block] Share capital Issued capital Audit of financial statements of associates Audit of financial statements of associates Audit of financial statements of associates Karuna Therapeutics, Inc. Karuna Karuna [Member] Karuna Exercise of stock options Increase (decrease) through exercise of options, equity Short-term investments Short-term investments Short-term Investment Short-term Investment Lease liability, renewal term Lease Liability, Renewal Term Lease Liability, Renewal Term Preferred Preference shares Preference shares [member] Investments in notes from associates Non-current receivables due from associates At fair value At fair value [member] Treasury Shares Description of accounting policy for treasury shares [text block] Reclassification of Akili to level 1 investment Reclassification of investment to investment in associate Reclassification of investment to investment in associate Number of intangible assets wrote-offs Number Of Intangible Written-off Assets Number Of Intangible Written-off Assets Accrued expenses Accruals classified as current Sale of future royalties Future Royalties [Member] Future Royalties Merger reserve Merger reserve [member] Other Other tax effects for reconciliation between accounting profit and tax expense (income) Sublease, write off Lease Receivable, Sublease, Write Off Lease Receivable, Sublease, Write Off Basic earnings/(loss) per share (in dollars per share) Basic earnings (loss) per share Share-based liability awards Share based liabilty awards [Member] Share based liabilty awards Number of equal installments Consideration For Acquired Non-controlling Interest, Number Of Payment Installments Consideration For Acquired Non-controlling Interest, Number Of Payment Installments Tax credits Tax Credit, Reconciliation Of Effective Tax Rate Tax Credit, Reconciliation Of Effective Tax Rate Loss on change in fair value of derivatives Gains (losses) on change in fair value of derivatives State - current State [Member] State Other non-current assets Other non-current assets Repayment of short-term note from associate Cash Receipts From Repayment Of Current Receivables Due From Associates, Classified As Investing Activities Cash Receipts From Repayment Of Current Receivables Due From Associates, Classified As Investing Activities Gain on deconsolidation of subsidiary Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates Deconsolidated Deconsolidated Lease Liabilities Deconsolidated Lease Liabilities Research and development Research And Development [Member] Research And Development Number of associate's common stock held at fair value Number of associate common stock held at fair value Number of associate common stock held at fair value Consideration for acquired non-controlling interest, second installment Consideration for acquired non-controlling interest, second installment Consideration for acquired non-controlling interest, second installment Share-based compensation expense Adjustments for share-based payments Finance income/(costs): Finance income/(costs) [Abstract] Finance income/(costs) Sale of equity instruments in other entities (in shares) Sale of equity instruments in other entities Sale of equity instruments in other entities Commitments and Contingencies [Table] Commitments and Contingencies [Table] Commitments and Contingencies Vedanta Biosciences Vedanta Vedanta Biosciences [Member] Vedanta Biosciences Development Costs Description of accounting policy for research and development expense [text block] Related parties Related parties [member] Schedule of Earnings/(Loss) Attributable to Owners of Company Earnings Loss attributable to owners of company [Table Text Block] Earnings Loss attributable to owners of company Performance based RSU Performance based RSU [Member] Performance based RSU Types of interest rates [axis] Types of interest rates [axis] Licenses Licences [member] Laboratory and manufacturing equipment Laboratory and Manufacturing Equipment [Member] Laboratory and Manufacturing Equipment Non-controlling Interest Disclosure of non-controlling interests [text block] Impairment of Non-Financial Assets Description of accounting policy for impairment of non-financial assets [text block] Expiration of share options in subsidiary Decrease In Non-controlling From Expiration Of Share Options In Subsidiary Decrease In Non-controlling From Expiration Of Share Options In Subsidiary Deconsolidated Deconsolidation Right-of-use Assets Deconsolidation Right-of-use Assets Capital And Financial Risk Management [Abstract] Capital And Financial Risk Management Within 10 years Not later than 10 years [Member] Not later than 10 years Unrecognized deferred tax asset Tax effect of tax losses Auditors Remuneration [Line Items] Auditors Remuneration [Line Items] Auditors Remuneration [Line Items] Business combination, number of additional shares received, additional cost Business Combination, Number Of Additional Shares Received, Additional Cost Business Combination, Number Of Additional Shares Received, Additional Cost Loss on disposal of assets Adjustments for gain (loss) on disposals, property, plant and equipment Akili Interactive Labs, Inc. Akili Interactive Labs [Member] Akili Interactive Labs Share-based payment expense Expense from share-based payment transactions with employees Timing of transfer of goods or services [axis] Timing of transfer of goods or services [axis] Current assets Current assets [abstract] Commitments and Contingencies Disclosure of commitments and contingent liabilities [text block] Categories of related parties [axis] Categories of related parties [axis] Other Other current payables Schedule of Subsidiary Preferred Shares, Minimum Liquidation Preference Summary of Minimum liquidation preference [Table Text Block] Summary of Minimum liquidation preference Schedule of Investments in Associates Summary Of Investments In Associates [Table Text Block] Summary Of Investments In Associates Total Income Tax Type Total Income Tax Type [Member] Total Income Tax Type PureTech LYT 100, Inc. PureTech LYT - 100 [Member] PureTech LYT - 100 Statement of changes in equity [line items] Statement of changes in equity [line items] Entity's total for associates Entity's total for associates [member] Classes of financial assets [axis] Classes of financial assets [axis] Assets Assets [abstract] Share-based Payment [Line Items] Share-based Payment [Line Items] Share-based Payment Floating interest rate Floating interest rate [member] Entity File Number Entity File Number Accrued interest – contractual Accrued interest - contractual Accrued interest - contractual Cash flows from investing activities: Cash flows from (used in) investing activities [abstract] Gains (losses) on change in fair value of equity investments Gains (Losses) On Change In Fair Value Of Equity Investments Gains (Losses) On Change In Fair Value Of Equity Investments Income/(loss) for the year Net income/(loss) Profit (loss) Par value per share (in GBP per share) Par value per share Auditor Firm ID Auditor Firm ID Entity Shell Company Entity Shell Company Disclosure of information of employees [Table] Disclosure of information of employees [Table] Disclosure of information of employees [Table] Accrued interest Borrowings, Accrued Interest Borrowings, Accrued Interest Disclosure of range of exercise prices of outstanding share options [line items] Disclosure of range of exercise prices of outstanding share options [line items] All Subsidiaries All Subsidiaries [Member] All Subsidiaries Value of shares authorized to be repurchased Stock Repurchase Program, Shares Authorized to be Repurchased Stock Repurchase Program, Shares Authorized to be Repurchased Taxation Description of accounting policy for income tax [text block] Translation reserve Reserve of exchange differences on translation Significant unobservable input Significant unobservable input, assets Finance (income)/costs, net Adjustments For Finance Costs (Income) Adjustments For Finance Costs (Income) Effect of shares issued & treasury shares purchased (in shares) Dilutive Effect Of All Instruments On Weighted Average Number Of Ordinary Shares, Including Effect Of Treasury Shares Purchased Dilutive Effect Of All Instruments On Weighted Average Number Of Ordinary Shares, Including Effect Of Treasury Shares Purchased Exercise price (GBP) (in GBP per share) Exercise price, share options granted Exercise of stock options Proceeds from exercise of options Convertible Notes [Roll Forward] Convertible Notes [Roll Forward] Convertible Notes Statement of changes in equity [abstract] Gain/(loss) on investments in notes from associates Loss on investments in notes from associates Gain (Loss) On Investment In Notes Receivable From Associates Gain (Loss) On Investment In Notes Receivable From Associates Liability for share-based awards Other payables, liability settled share based awards Other payables, liability settled share based awards Share in other comprehensive income of associates Share of other comprehensive income of 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Subsidiary Plan [Line Items] Significant Subsidiary Plan [Line Items] Significant Subsidiary Plan Leasehold improvements Leasehold improvements [member] Schedule of Property and Equipment, Net Schedule of Property & Equipment net [Table Text Block] Schedule of Property & Equipment net Lease liability, current Short-term portion of lease liability Current lease liabilities Number of earnout shares received from SPAC exchange (in shares) Financial Investments, Number Of Earnout Shares Received From SPAC Exchange Financial Investments, Number Of Earnout Shares Received From SPAC Exchange Equity-settled share-based awards Increase (decrease) through share-based payment transactions, equity PureTech Health LLC PureTech Health LLC PureTech Health [Member] PureTech Health Disclosure of detailed information about borrowings [line items] Disclosure of detailed information about borrowings [line items] Schedule of Changes in the Value of Subsidiary Preferred Shares Changes in the value of 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Sonde Sonde [Member] Sonde Segment consolidation items [axis] Segment consolidation items [axis] Endra Holdings, LLC (held indirectly through Enlight) Endra Holdings LLC [Member] Endra Holdings LLC Schedule of RSU Activity Disclosure of number and weighted average exercise prices of other equity instruments [text block] Performance share plan Performance Share Plan [Member] Performance Share Plan Impairment Write-off amount Impairment loss recognised in profit or loss, intangible assets other than goodwill Nontrading holding companies Nontrading holding companies [Abstract] Nontrading holding companies Convertible note receivable Convertible note receivable Convertible Note Receivable [Member] Convertible Note Receivable Document and Entity Information [Line Items] Document Information [Line Items] Unused federal orphan drug tax credits Unused Federal orphan drug tax credits Unused Federal orphan drug tax credits Issued share capital acquired (in shares) Issued Share capital acquired 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