Document and Entity Information [Abstract] Entity Addresses [Table] Entity Addresses [Line Items] Document Type Document Period End Date Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Consolidated income statement Revenue Revenue Cost of sales Cost of sales Gross profit Gross profit Selling, general and administrative expense Selling, general and administration Research and development expense Research and development Other operating income (expense) Other operating income/(expense) Profit (loss) from operating activities Group operating profit Operating profit Finance income Finance income Finance costs Finance expense Finance income (cost) Net finance costs Gains (losses) on net monetary position Net monetary gain arising from hyperinflationary economies Profit (loss) before tax Profit before tax Tax expense (income) Income tax Tax - IFRS Profit (loss) Profit after tax for the period Profit after tax for the period Profit after tax Profit (loss), attributable to owners of parent Profit attributable to shareholders of the Group Profit (loss), attributable to non-controlling interests Profit attributable to non-controlling interests Basic earnings (loss) per share Basic earnings per share (pence) Diluted earnings (loss) per share Diluted earnings per share (pence) Consolidated statement of comprehensive income Other comprehensive income [abstract] Other comprehensive (expenses)/income for the year Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] Items that may be subsequently reclassified to the income statement: Other comprehensive income, before tax, exchange differences on translation of foreign operations Exchange movements on overseas net assets The amount of other comprehensive income, before tax, after reclassification adjustments attributable to non-controlling interests, related to exchange differences on translation of financial statements of foreign operations. Other Comprehensive Income, Before Tax, Exchange Differences on Translation of Foreign Operations attributable To Non-controlling Interests Exchange movements on overseas net assets of non-controlling interests Gains (losses) on cash flow hedges, before tax Fair value movements on cash flow hedges Reclassification adjustments on cash flow hedges, before tax Reclassification of cash flow hedges to the income statement Income tax relating to components of other comprehensive income that will be reclassified to profit or loss Related tax on items that may be subsequently reclassified to the income statement Other comprehensive income that will be reclassified to profit or loss, net of tax Total Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] Items that will not be reclassified to income statement: Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans Remeasurement gains on defined benefit plan Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss Related tax on items that will not be reclassified to the income statement Other comprehensive income, before tax, gains (losses) from investments in equity instruments Fair value movements on equity investments Other comprehensive income that will not be reclassified to profit or loss, net of tax Total Other comprehensive income Other comprehensive income/(expenses) Other comprehensive (expenses)/income, net of tax for the period Comprehensive income Total comprehensive (expenses)/income Total comprehensive income, net of tax for the period Comprehensive income attributable to [abstract] Total comprehensive income for the period attributable to: Comprehensive income, attributable to owners of parent Shareholders of the Group Comprehensive income, attributable to non-controlling interests Non-controlling interests Consolidated balance sheet Non-current assets [abstract] Non-current assets Property, plant and equipment Property, plant and equipment Right-of-use assets Right of use assets Intangible assets and goodwill Intangible assets Other non-current financial assets Other investments Deferred tax assets Deferred tax assets Non-current net defined benefit asset Post-employment benefit assets Non-current derivative financial assets Derivative financial instruments Other non-current assets Non-current assets Total non-current assets Current assets [abstract] Current assets Current inventories Inventories Trade and other current receivables Trade and other receivables Cash and cash equivalents Cash and cash equivalents Current derivative financial assets Derivative financial instruments Current tax assets, current Current tax receivables Current assets Total current assets Assets Total assets Current liabilities [abstract] Current liabilities Current borrowings and current portion of non-current borrowings Current Short-term borrowings Current Trade and other current payables Trade and other payables Current derivative financial liabilities Derivative financial instruments Current tax liabilities, current Current tax payable Current provisions Short-term provisions Current liabilities Total current liabilities Non-current liabilities [abstract] Non-current liabilities Non-current portion of non-current borrowings Long-term borrowings Non-current Non-current Deferred tax liabilities Deferred tax liabilities Non-current net defined benefit liability Post-employment benefit obligations Non-current derivative financial liabilities Derivative financial instruments Non-current provisions Long-term provisions Other non-current liabilities Other non-current liabilities Non-current liabilities Total non-current liabilities Liabilities Total liabilities Assets (liabilities) Net assets Equity [abstract] Equity Issued capital Share capital Other reserves Other reserves Retained earnings Retained earnings Equity attributable to owners of parent Shareholders' equity Non-controlling interests Non-controlling interests Equity Ending Balance Beginning Balance Total equity Consolidated statement of changes in equity Statement of changes in equity [table] Statement of changes in equity [table] Components of equity [axis] Components of equity [axis] Components of equity [domain] Equity attributable to owners of parent [member] Shareholders' equity Issued capital [member] Share capital Other reserves [member] Other reserves Retained earnings [member] Retained earnings Non-controlling interests [member] Non-controlling interests Statement of changes in equity [line items] Statement of changes in equity [line items] Dividends recognised as distributions to non-controlling interests Distributions to non-controlling interests Dividends recognised as distributions to owners of parent Dividends to equity shareholders Increase (decrease) through share-based payment transactions, equity Share based incentive plans Decrease (increase) through tax on share-based payment transactions, equity Tax on share-based incentive plans Increase (decrease) through exercise of options, equity Shares transferred to employees The decrease (increase) in equity resulting from the repurchase of ordinary shares and capital reduction. Decrease (increase) through repurchase of ordinary shares and capital reduction, equity Repurchase of ordinary shares and capital reduction Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity Purchase of non-controlling interests Consolidated cash flow statement Cash flows from (used in) operating activities [abstract] Cash flows from operating activities Adjustments for income tax expense Taxation charge Adjustments for finance income (cost) Net finance costs Adjustments for depreciation expense Depreciation of property, plant and equipment and right of use assets Adjustments for amortisation expense Amortisation of intangible assets Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss Impairment and assets written off, net of reversals Adjustments for losses (gains) on disposal of non-current assets Loss/(gain) on sale of property, plant and equipment and businesses Adjustments for share-based payments Share-based incentive plan expense Other adjustments for non-cash items Other non-cash movements Adjustments for provisions Increase/(decrease) in pension and other provisions Changes in working capital. Changes in Working Capital [Abstract] Changes in working capital: Adjustments for decrease (increase) in inventories (Increase)/decrease in inventories Adjustments for decrease (increase) in trade accounts receivable Increase in trade receivables Adjustments for increase (decrease) in trade accounts payable Increase in trade payables Adjustments for increase (decrease) in other receivable and payable to reconcile profit (loss) to net cash flow from (used in) operating activities. Adjustments for Increase (Decrease) in Other Receivable and Payable, Net Net change in other receivables and payables Income taxes paid (refund), classified as operating activities Taxation paid Cash flows from (used in) operating activities Net cash inflow from operating activities Cash flows from (used in) investing activities [abstract] Cash flows from investing activities Purchase of property, plant and equipment, classified as investing activities Purchase of property, plant and equipment Proceeds from sales of property, plant and equipment, classified as investing activities Proceeds from sale of property, plant, and equipment Purchase of intangible assets, classified as investing activities Purchase of intangible assets Cash flows from losing control of subsidiaries or other businesses, classified as investing activities Proceeds from sale of businesses Interest received, classified as investing activities Interest received Cash flows from (used in) decrease (increase) in short-term deposits and investments Decrease in liquid investments Cash flows from (used in) investing activities Net cash outflow from investing activities Cash flows from (used in) financing activities [abstract] Cash flows from financing activities Payments to acquire or redeem entity's shares Share capital purchased for cancellation Repurchase of shares Payments from changes in ownership interests in subsidiaries that do not result in loss of control Purchase of non-controlling interests Payments of lease liabilities, classified as financing activities Payment of lease liabilities Interest paid, classified as financing activities Interest paid Dividends paid to equity holders of parent, classified as financing activities Dividends paid to shareholders Dividends paid to non-controlling interests, classified as financing activities Distributions to non-controlling interests Repayments of borrowings, classified as financing activities Repayment of borrowings Repayment of term loan Proceeds from borrowings, classified as financing activities Proceeds from borrowings Other inflows (outflows) of cash, classified as financing activities Other financing cash flows Cash flows from (used in) financing activities Net cash outflow from financing activities Increase (decrease) in cash and cash equivalents and bank overdrafts Increase (decrease) in cash and cash equivalents and bank overdrafts Decrease in cash and cash equivalents and bank overdrafts Cash and cash equivalents if different from statement of financial position Cash and cash equivalents and bank overdrafts at the end of the period Cash and cash equivalents and bank overdrafts at the beginning of the period Cash and cash equivalents and bank overdrafts at the end of the period Cash and cash equivalents net of bank overdrafts Effect of exchange rate changes on cash and cash equivalents Exchange adjustments Cash and cash equivalents if different from statement of financial position [abstract] Cash and cash equivalents and bank overdrafts at the end of the period comprise: Bank overdrafts Overdrafts No definition available. BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES The entire disclosure of basis of presentation and significant accounting policies. Ifrs Basis of Presentation and Significant Accounting Policies [Text Block] BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES REVENUE AND SEGMENT INFORMATION Disclosure of operating segments [text block] REVENUE AND SEGMENT INFORMATION IMPAIRMENT REVIEW Disclosure of impairment of assets [text block] IMPAIRMENT REVIEW RESTRUCTURING COSTS The entire disclosure of restructuring cost. Disclosure of restructuring costs [Text block] RESTRUCTURING COSTS TAX Disclosure of income tax [text block] TAX N/A DIVIDENDS Disclosure of dividends [text block] DIVIDENDS EARNINGS PER SHARE Disclosure of earnings per share [text block] EARNINGS PER SHARE FINANCIAL INSTRUMENTS AND RELATED DISCLOSURES Disclosure of financial instruments [text block] FINANCIAL INSTRUMENTS AND RELATED DISCLOSURES BORROWINGS Disclosure of borrowings [text block] BORROWINGS SHARE CAPITAL Disclosure of issued capital [text block] SHARE CAPITAL CONTINGENT LIABILITIES Disclosure of contingent liabilities [text block] CONTINGENT LIABILITIES RELATED PARTY TRANSACTIONS Disclosure of related party [text block] RELATED PARTY TRANSACTIONS POST BALANCE SHEET EVENTS Disclosure of events after reporting period [text block] POST BALANCE SHEET EVENTS Description of accounting policy for foreign currency translation [text block] Exchange rates The description of the entity's accounting policy for hyperinflationary reporting. Description of accounting policy for hyperinflationary reporting [Policy Text Block] Accounting for Argentina and Turkey as Hyperinflationary economies Disclosure of going concern [text block] Going concern The description of the accounting policy for the entity's judgments and estimates. Description Of Accounting Policy For Judgments and estimates [Policy Text block] Judgements and estimates The description of the entity's accounting policy for recent accounting developments. Description of Accounting Policy for Recent Accounting Developments [Policy Text Block] Recent accounting developments Tabular disclosure of relevant exchange rates. Disclosure of Relevant Exchange Rates [Table Text Block] Schedule of relevant exchange rates Disclosure of geographical areas [text block] Schedule of analysis of revenue and Adjusted Operating Profit by geographical segment Disclosure of products and services [text block] Schedule of analysis of revenue by product Tabular disclosure IFRS based income tax expense and management's adjustments Schedule of IFRS based income tax expense and management's adjustments [Table Text Block] Schedule of IFRS based income tax expense and management's adjustments Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. Ifrs Dividends Declared [Table Text Block] Schedule of dividends declared and paid during the year Earnings per share [text block] Schedule of basic and diluted earnings per share Disclosure of fair value of financial instruments [text block] Schedule of financial instruments held at fair value by fair value hierarchy Disclosure of fair value measurement of liabilities [text block] Schedule of carrying value and fair value of financial instruments Disclosure of detailed information about borrowings [text block] Schedule of composition of borrowings Disclosure of reconciliation of liabilities arising from financing activities [text block] Schedule of movement in financial liabilities to cash flow statement Disclosure of information about consolidated structured entities [table] Disclosure of information about consolidated structured entities [table] Maturity [axis] Maturity [domain] This member represents August 2029. August 2029 [member] August 2029 Classes of share capital [axis] Classes of share capital [axis] Classes of share capital [domain] Ordinary shares [member] Ordinary shares Ordinary shares, nominal value £0.01 per share Currency [Axis] All Currencies [Domain] Euro Member Countries, Euro Euro United States of America, Dollars USD Borrowings by name [axis] Borrowings by name [domain] This member stands for Euro commercial paper. Euro Commercial Paper [Member] Euro commercial paper This member stands for US Dollar commercial paper. US Dollar Commercial Paper [Member] US Dollar commercial paper Disclosure of information about consolidated structured entities [line items] Disclosure of information about consolidated structured entities [line items] Par value per share Nominal value per share Number of major product categories Number of major product categories Notional amount Nominal value Undrawn borrowing facilities Undrawn credit facilities Schedule disclosing information related to accounting policies. Disclosure of Accounting Policies [Table] China, Yuan Renminbi CNY Line items for disclosing information related to accounting policies. Disclosure of Accounting Policies [Line Items] Average foreign exchange rate Average rates Closing foreign exchange rate Period-end rates Hyperinflationary reporting, effect on revenue in the period Hyperinflationary reporting, effect on revenue in the period Hyperinflationary reporting, effect on operating profit (loss) in the period Hyperinflationary reporting, effect on operating profit (loss) in the period Hyperinflationary reporting, effect on operating profit in the period Disclosure of geographical areas [table] Segment consolidation items [axis] Segment consolidation items [domain] Unallocated amounts [member] Corporate and other unallocated Segments [axis] Segments [domain] This member stands for the North America segment. North America, segment [Member] North America This member stands for the Europe segment. Europe, segment [Member] Europe This member stands for the Asia Pacific segment. Asia Pacific, segment [Member] APAC This member stands for the International segment. International, segment [Member] International Disclosure of operating segments [line items] Number of geographical operating units. Number of geographical operating units Number of reportable segments. Ifrs Number Of Reportable Segments Number of reportable segments Adjustments to reconcile operating profit to adjusted operating profit. Adjustments to reconcile operating profit to adjusted operating profit Reconciling items between Group operating profit and Group adjusted operating profit The amount of adjusted operating profit. Adjusted Profit (loss) from operations Adjusted operating profit Net amortisation and impairment of intangible assets excluding computer software and impairment (reversal of impairment) of goodwill Net amortisation and impairment of intangible assets excluding computer software and impairment (reversal of impairment) of goodwill Expense of restructuring activities Restructuring costs Disclosure of products and services [table] Products and services [axis] Products and services [domain] This member stands for company product being Oral health. Oral Health [Member] Oral Health This member stands for company product being Vitamins, minerals and supplements. Vitamins, Minerals And Supplements [Member] Vitamins, Minerals and Supplements This member stands for company product being pain relief. Pain Relief [Member] Pain Relief This member stands for company product being respiratory health. Respiratory Health [Member] Respiratory Health This member represents Digestive Health. Digestive Health [Member] Digestive Health This member stands for Therapeutic Skin Health & Other. Therapeutic Skin Health and Other [Member] Therapeutic Skin Health and Other Disclosure of products and services [line items] Disclosure of attribution of expenses by nature to their function [table] Attribution of expenses by nature to their function [axis] Attribution of expenses by nature to their function [axis] Attribution of expenses by nature to their function [domain] Cost of sales [member] Cost of sales Selling, general and administrative expense [member] Selling, general and administration Primary financial statement caption in which the reported facts about research and development expense have been included. Ifrs Research and Development Expense [Member] Research and development Disclosure of attribution of expenses by nature to their function [line items] Expense of restructuring activities, operating model transformation. Expense of restructuring activities, operating model transformation Restructuring costs, operating model transformation Expense of restructuring activities, gain on site closures. Expense of restructuring activities, gain on site closures Restructuring costs, gain on site closures Expense of restructuring activities, operating model transformation, severance and other termination benefits. Expense of restructuring activities, operating model transformation, severance and other termination benefits Accounting profit Pre-tax profit - IFRS Management's estimate of adjustments to profit (loss) before tax for tax purposes Management's estimate of adjustments to profit (loss) before tax for tax purposes Pre-tax profit - Adjusting items Management's estimate of adjusted profit (loss) before tax for tax purposes Management's estimate of adjusted profit (loss) before tax for tax purposes Pre-tax profit - Adjusted Management's estimate of adjustments to tax expense (income) Management's estimate of adjustments to tax expense (income) Tax - Adjusting items Management's estimate of adjusted tax expense (income) Management's estimate of adjusted tax expense (income) Tax - Adjusted Average effective tax rate Tax rate - IFRS Management's estimate of adjusted average effective tax rate Management's estimate of adjusted average effective tax rate Tax rate - Adjusted Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share Dividends proposed, per share Interim dividend per share Dividends paid, ordinary shares per share Dividend per share Dividends paid, ordinary shares Total dividend Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating basic earnings per share Profit after tax attributable to equity shareholders Weighted average shares, before effect of treasury shares Weighted average shares, before effect of treasury shares Weighted average number of shares Weighted average number of treasury shares and shares held by employee benefit trust during the period. Weighted average number of treasury shares and shares held by employee benefit trust during the period Weighted average number of treasury shares and shares held by EBTs Weighted average number of ordinary shares used in calculating basic earnings per share Basic weighted average number of shares - used for basic earnings per share Dilutive effect of all instruments on weighted average number of ordinary shares Effect of dilutive potential shares Weighted average number of ordinary shares used in calculating diluted earnings per share Diluted weighted average number of shares Disclosure of detailed information about financial instruments [table] Categories of financial assets [axis] Categories of financial assets [domain] Financial assets at fair value through other comprehensive income, category [member] Financial assets at fair value through other comprehensive income Financial assets at fair value through profit or loss, category [member] Financial assets at fair value through profit or loss Classes of financial assets [axis] Classes of financial assets [domain] Financial assets at fair value, class [member] Financial assets at fair value Equity investments [member] Equity investments This member stands for held for trading derivatives that are not in a designated and effective hedging relationship. Held for trading derivatives that are not in a designated and effective hedging relationship [Member] Held for trading derivatives that are not in a designated and effective hedging relationship This member stands for derivatives designated and effective as hedging instruments . Derivatives Designated and Effective as Hedging Instruments [Member] Derivatives designated and effective as hedging instruments Fund that invests in short-term money-market instruments, for example, but not limited to, commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and other highly liquid securities. Ifrs Money Market Funds [Member] Cash and cash equivalents (money market funds) Categories of financial liabilities [axis] Categories of financial liabilities [domain] Financial liabilities at fair value through profit or loss, category [member] Financial liabilities at fair value through profit or loss Classes of financial liabilities [axis] Classes of financial liabilities [domain] Financial liabilities at fair value, class [member] Financial liabilities at fair value This member stands for held for trading derivatives that are not in a designated and effective hedging relationship. Held for Trading Derivatives Not Designated and Effective Hedging Relationship [Member] Held for trading derivatives that are not in a designated and effective hedging relationship Levels of fair value hierarchy [axis] Levels of fair value hierarchy [domain] Level 1 of fair value hierarchy [member] Level 1 Level 2 of fair value hierarchy [member] Level 2 Level 3 of fair value hierarchy [member] Level 3 Types of hedges [axis] Types of hedges [domain] Fair value hedges [member] Fair value hedge Cash flow hedges [member] Cash flow hedge Hedges of net investment in foreign operations [member] Net investment hedge Disclosure of detailed information about financial instruments [line items] Financial instruments held at fair value by fair value hierarchy Carrying value and fair value of financial instruments Financial assets Financial liabilities Financial liabilities Carrying value, Financial liabilities Financial liabilities, at fair value Fair value, Financial Liabilities Fair value, Financial Liabilities Measurement [axis] Measurement [domain] Not measured at fair value in statement of financial position but for which fair value is disclosed [member] Carrying value Debt security, in which the authorized issuer owes the holder a debt and is obliged to repay the principal and interest (the coupon). Ifrs Bonds [Member] Bonds Disclosure of detailed information about borrowings [table] Unsecured promissory note (generally negotiable) that provides institutions with short-term funds. Ifrs Commercial Paper [Member] Commercial paper This member stands for Loan and overdrafts. Loan And Overdrafts [Member] Loan and overdrafts This member represents advances. Advances [member] Advances Lease liabilities [member] Lease liabilities This member stands for Non-voting Preference Shares. Non-voting Preference Shares [Member] Non-voting preference shares This member stands for the Euro Medium Term Note Programme Euro Medium Term Note Programme [Member] Euro Medium Term Note Programme Pre-Separation EUR Medium Term Note Disclosure of detailed information about borrowings [line items] Borrowings Borrowings Total borrowings Borrowings, interest rate Interest rate Short-term borrowings [member] Short-term borrowings Short-term bank loans This member stands for Pre-Separation USD Notes. Pre-Separation USD Notes [Member] Pre-Separation USD Notes This member stands for short-term notes in issue Short-term notes in issue [member] Short-term notes in issue This member represents CNY short-term bank loans. CNY short-term bank loans [member] CNY short-term bank loans Range [axis] Range [domain] Weighted average [member] Weighted average Represents the average effective pre-swap interest rate of borrowings. Borrowings Average Effective Pre Swap Interest Rate Average effective pre-swap interest rate Represents the average effective post-swap interest rate of borrowings. Borrowings Average Effective Post-swap Interest Rate Average effective post-swap interest rate Repayments of bonds, notes and debentures Redemption of notes Repayment of notes This member stands for long-term notes in issue Long-term notes in issue [member] Long-term notes in issue This member stands for the CNY long-term bank loans. CNY long-term bank loans [member] CNY long-term bank loans Later than five years [member] After five years Number of preference shares issued. Number of Preference Shares Issued Number of preference shares issued Issue price per share. Issue Price Per Share Issue price per share Coupon rate, preference shares Coupon rate, preference shares This member represents Revolving credit facilities Revolving credit facilities [Member] Revolving credit facilities This member represents the Credit facility maturing August 2029. Credit facility maturing August 2029 [Member] Credit facility maturing August 2029 Disclosure of reconciliation of liabilities arising from financing activities [table] Liabilities arising from financing activities [axis] Liabilities arising from financing activities [domain] This member stands for total financial liabilities arising from financing activities Total financial liabilities arising from financing activities [Member] Total financial liabilities arising from financing activities Long-term borrowings [member] Long-term borrowings Derivatives [member] Derivative financial instruments This member stands for cash and cash equivalents net of bank overdrafts Cash and cash equivalents net of bank overdrafts [Member] Cash and cash equivalents net of bank overdrafts Disclosure of reconciliation of liabilities arising from financing activities [line items] Borrowings Net debt Net debt at end of the year Net debt at beginning of the year Increase (decrease) through financing cash flows, liabilities arising from financing activities Cash flows Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities Foreign exchange The increase (decrease) in liabilities arising from financing activities resulting from changes in fair values, interest and other changes. Increase Decrease Through Changes In Fair Values, Interest And Other Changes, Liabilities Arising From Financing Activities Fair value adjustments, interest and reclassification Disclosure of classes of share capital [table] Disclosure of classes of share capital [table] Share Repurchase Program [Axis] Share Repurchase Program [Domain] This member represents the allocated amount for share buybacks during 2025. Share buyback programme, allocated amount for 2025 [Member] Share buyback programme, allocated amount for 2025 This member represents the allocated amount for share buybacks during 2026. Share buyback programme, allocated amount for 2026 [Member] Share buyback programme, allocated amount for 2026 Disclosure of classes of share capital [line items] Disclosure of classes of share capital [line items] Share Repurchase Program, Authorized, Amount Number of shares outstanding Votes per share Votes per share Number of shares repurchased during the period Number of shares repurchased during the period Trade and other receivables