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Disclosure - Summary of Business and Material Accounting Policies - Estimated Useful Lives (Detail) link:presentationLink link:calculationLink link:definitionLink 75750 - Disclosure - Critical Accounting Estimates and Judgments - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75760 - Disclosure - Revenues - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75770 - Disclosure - Revenues - Summary of Revenues by Type (Detail) link:presentationLink link:calculationLink link:definitionLink 75780 - Disclosure - Revenues - Summary of Geographical Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75790 - Disclosure - Revenues - Summary of Contract Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 75800 - Disclosure - Revenues - Summary of Remaining Performance Obligations (Detail) link:presentationLink link:calculationLink link:definitionLink 75810 - Disclosure - Segment Information - Summary of Operating Results of Reportable Segments (Detail) link:presentationLink link:calculationLink link:definitionLink 75820 - Disclosure - Segment Information - Summary of Revenues by Classes of Similar Products or Services (Detail) link:presentationLink link:calculationLink link:definitionLink 75830 - Disclosure - Segment Information - Summary of Operating Results by Geographical areas (Detail) link:presentationLink link:calculationLink link:definitionLink 75840 - Disclosure - Segment Information - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75850 - Disclosure - Operating Expenses - Components of Operating Expenses (Detail) link:presentationLink link:calculationLink link:definitionLink 75860 - Disclosure - Other Operating Gains, Net - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75870 - Disclosure - Disposals - Summary of Net Assets Disposed (Detail) link:presentationLink link:calculationLink link:definitionLink 75880 - 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Disclosure - Equity Method Investments - Summary of Share of Post-Tax Earnings in its YPL Investment (Detail) link:presentationLink link:calculationLink link:definitionLink 75950 - Disclosure - Equity Method Investments - Summary Financial Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75960 - Disclosure - Equity Method Investments - Summary of Financial Information for YPL with Reconciliation to Thomson Reuters Carrying Value of its Investment (Detail) link:presentationLink link:calculationLink link:definitionLink 75970 - Disclosure - Taxation - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 75980 - Disclosure - Taxation - Components of Tax (Benefit) Expense (Detail) link:presentationLink link:calculationLink link:definitionLink 75990 - Disclosure - Taxation - Schedule of Taxes on items Recognized in other Comprehensive (loss) income or Directly in Equity (Detail) link:presentationLink link:calculationLink link:definitionLink 76000 - Disclosure - Taxation - Schedule of Reconciliation of Income Tax Expense Benefit (Detail) link:presentationLink link:calculationLink link:definitionLink 76010 - Disclosure - Taxation - Schedule of Reconciliation of Income Tax Expense Benefit (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 76020 - Disclosure - Discontinued Operations - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76030 - Disclosure - Earnings Per Share - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76040 - Disclosure - Earnings Per Share - Reconciliation of Earnings Used for Earnings per Share Calculations (Detail) link:presentationLink link:calculationLink link:definitionLink 76050 - Disclosure - Earnings Per Share - Weighted Average Common Shares (Detail) link:presentationLink link:calculationLink link:definitionLink 76060 - Disclosure - Cash and Cash Equivalents - Additional information (Detail) link:presentationLink link:calculationLink link:definitionLink 76070 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) link:presentationLink link:calculationLink link:definitionLink 76080 - Disclosure - Cash and Cash Equivalents-Summary of Cash and Cash Equivalents (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 76090 - Disclosure - Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) link:presentationLink link:calculationLink link:definitionLink 76100 - Disclosure - Trade and Other Receivables - Schedule of Aging of Trade Receivables (Detail) link:presentationLink link:calculationLink link:definitionLink 76110 - Disclosure - Trade and Other Receivables - Schedule of Change in Allowance for Doubtful Accounts (Detail) link:presentationLink link:calculationLink link:definitionLink 76120 - Disclosure - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) link:presentationLink link:calculationLink link:definitionLink 76130 - Disclosure - Property and Equipment - Summary of Property and Equipment (Detail) link:presentationLink link:calculationLink link:definitionLink 76140 - Disclosure - Software - Schedule of Changes in Software (Detail) link:presentationLink link:calculationLink link:definitionLink 76150 - Disclosure - Other Identifiable Intangible Assets - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76160 - Disclosure - Other Identifiable Intangible Assets - Summary of Other Identifiable Intangible Assets (Detail) link:presentationLink link:calculationLink link:definitionLink 76170 - Disclosure - Goodwill - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76180 - Disclosure - Goodwill - Summary of Goodwill (Detail) link:presentationLink link:calculationLink link:definitionLink 76190 - Disclosure - Goodwill - Summary of Carrying Amount of Goodwill by Cash Generating Unit (Detail) link:presentationLink link:calculationLink link:definitionLink 76200 - Disclosure - Goodwill - Impairment Test of Goodwill- Key Assumptions (Detail) link:presentationLink link:calculationLink link:definitionLink 76210 - Disclosure - Financial Instruments - Summary of Financial Assets and Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 76220 - Disclosure - Financial Instruments - Summary of Financial Assets and Liabilities (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 76230 - Disclosure - Financial Instruments - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76240 - Disclosure - Financial Instruments - Summary of Debt Exchange (Details) link:presentationLink link:calculationLink link:definitionLink 76250 - Disclosure - Financial Instruments - Summary of Debt Exchange (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 76260 - Disclosure - Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 76270 - Disclosure - Financial Instruments - Summary of Debt and Related Derivative Instruments (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 76280 - Disclosure - Financial Instruments - Outstanding Instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 76290 - Disclosure - Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Detail) link:presentationLink link:calculationLink link:definitionLink 76300 - Disclosure - Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 76310 - Disclosure - Financial Instruments - Summary of Fixed and Floating Rate Mix of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 76320 - Disclosure - Financial Instruments - Fair Value Gains and Losses from Derivative Financial Instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 76330 - Disclosure - Financial Instruments - Currency Risk- Sensitivity Analysis (Detail) link:presentationLink link:calculationLink link:definitionLink 76340 - Disclosure - Financial Instruments - Disclosure of Maturity Analysis for Non-Derivative and Derivative Financial Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 76350 - Disclosure - Financial Instruments - Summary of Credit Ratings (Detail) link:presentationLink link:calculationLink link:definitionLink 76360 - Disclosure - Financial Instruments - Net Debt (Detail) link:presentationLink link:calculationLink link:definitionLink 76370 - Disclosure - Financial Instruments - Reconciliation of Movements of Liabilities to Cash Flows Arising from Financing Activities (Detail) link:presentationLink link:calculationLink link:definitionLink 76380 - Disclosure - Financial Instruments - Summary of Fair Value Measurements Carried at Fair Value in the Consolidated Statement of Financial Position (Detail) link:presentationLink link:calculationLink link:definitionLink 76390 - Disclosure - Financial Instruments - Summary of Offsetting of Financial Assets and Financial Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 76400 - Disclosure - Other Non-Current Assets - Summary of Other Non-Current Assets (Detail) link:presentationLink link:calculationLink link:definitionLink 76410 - Disclosure - Other Non-Current Assets - Summary of Other Non-Current Assets (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 76420 - Disclosure - Payables, Accruals and Provisions - Schedule of Payables, Accruals and Provisions (Detail) link:presentationLink link:calculationLink link:definitionLink 76430 - Disclosure - Provisions and Other Non-Current Liabilities - Summary of Provisions and Other Non-Current Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 76440 - Disclosure - Provisions and Other Non-Current Liabilities - Summary of Movement in Provisions (Detail) link:presentationLink link:calculationLink link:definitionLink 76450 - Disclosure - Provisions and Other Non-Current Liabilities - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76460 - Disclosure - Deferred Tax - Reconciliation of Movements of Deferred Tax Assets and Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 76470 - Disclosure - Deferred Tax - Summary of Estimated Recovery Period For Deferred Tax Balances (Detail) link:presentationLink link:calculationLink link:definitionLink 76480 - Disclosure - Deferred Tax - Summary of Tax Losses and Other Tax Attributes (Detail) link:presentationLink link:calculationLink link:definitionLink 76490 - Disclosure - Deferred Tax - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76500 - Disclosure - Capital - Summary of Change in Capital (Detail) link:presentationLink link:calculationLink link:definitionLink 76510 - Disclosure - Capital - Summary of Change in Capital (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 76520 - 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Disclosure - Leases - Summary of Carrying Amount and Related Depreciation (Detail) link:presentationLink link:calculationLink link:definitionLink 76780 - Disclosure - Leases - Summary of Future Aggregate Undiscounted Non-cancellable Lease Payments (Detail) link:presentationLink link:calculationLink link:definitionLink 76790 - Disclosure - Supplemental Cash Flow Information - Details of Other in the Consolidated Statement of Cash Flow (Detail) link:presentationLink link:calculationLink link:definitionLink 76800 - Disclosure - Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Detail) link:presentationLink link:calculationLink link:definitionLink 76810 - Disclosure - Supplemental Cash Flow Information - Details of Income Taxes Paid (Detail) link:presentationLink link:calculationLink link:definitionLink 76820 - Disclosure - Acquisitions - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76830 - Disclosure - Acquisitions - Summary of Acquisition Activity (Detail) link:presentationLink link:calculationLink link:definitionLink 76840 - Disclosure - Acquisitions - Summary of Brief Description of the Most Significant Acquisition (Detail) link:presentationLink link:calculationLink link:definitionLink 76850 - Disclosure - Acquisitions - Summary of Net Assets Acquired (Detail) link:presentationLink link:calculationLink link:definitionLink 76860 - Disclosure - Contingencies, Commitments and Guarantees - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76870 - Disclosure - Contingencies, Commitments and Guarantees - Summary of Future Unconditional Purchase Obligations (Detail) link:presentationLink link:calculationLink link:definitionLink 76880 - Disclosure - Related Party Transactions - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 76890 - Statement - Acquisitions - Summary of Net Assets Acquired (Detail) Alternate 1 link:presentationLink link:calculationLink link:definitionLink 76900 - 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Shares Issued Under Dividend Reinvestment Plan Shares issued under DRIP Shares issued under DRIP Current prepaid expenses Prepaid expenses Disclosure of changes in accounting policies [text block] Changes in accounting policies Land and buildings [member] Land, buildings and building improvements [member] Land, Buildings and Building Improvements [Member] Disclosure of financial assets and liabilities table. Disclosure Of Financial Assets And Liabilities [table] Disclosure Of Financial Assets And Liabilities [table] Disclosure of detailed information about business combination [abstract] Estimate of contributions expected to be paid to plan for next annual reporting period Expected employer contribution to be made in 2020 Amended credit facility maturities in November 2027. Amended Credit Facility Maturities In November Two Thousand Twenty Seven [Member] Amended Credit Facility Maturities in November 2027 [Member] Status Of Settlement Of Tax Dues [Axis] Top of Range [Member] Top of Range [Member] Top of range [member] Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities Foreign exchange movements Other receivables Other receivables Entity Incorporation, State or Country Code Disclosure of transaction price allocated to remaining performance obligations [table] Range two. Range Two [Member] 75.01 - 80.00 [Member] Description of accounting policy for derivative financial instruments [text block] Derivatives that do not qualify for hedge accounting Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Cash flow hedges Cash flow hedges [member] Actuarial assumption of discount rates Discount rate Years to retirement difference between current age of participants and retirement age. Years To Retirement Difference Between Current Age of Participants And Retirement Age Years to retirement difference between current age of participants and retirement age Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity Purchase of non-controlling interests Brand names Trade Name Income Loss From Discontinued Operations [table] Income Loss From Discontinued Operations [table] Income Loss From Discontinued Operations [table] Disclosure of detailed information about investments accounted for using equity method. Disclosure of detailed information about investments accounted for using equity method [text block] Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position Entity Current Reporting Status Entity Current Reporting Status Total capital of the entity. Capital1 Capital Percentage Share of Borrowings Percentage share of borrowings. % Share Increase (decrease) through share-based payment transactions, equity Stock compensation plans Sure prep LLC. Sure Prep LLC [Member] SurePrep LLC [Member] Deferred Tax Liabilities. 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Credit Ratings On Commercial Paper Description Commercial paper Cash flows from (used in) investing activities, continuing operations Investing cash flows from continuing operations Unused tax losses [member] Unused tax losses [member] Disclosure of transaction price allocated to remaining performance obligations [abstract] The useful lives or depreciation rates used for property, plant and equipment. Disclosure Of Property Plant And Equipment Estimated Useful Life Explanatory [Text Block] Schedule of Computer Hardware and Other Property - Estimated Useful Lives Contribution type. Contribution Type [Member] Consortium. Consortium [Member] Non controlling interest recognised as of acquisition date. Non Controlling Interest Recognised As Of Acquisition Date  Non-controlling interests The disclosure of future unconditional purchase obligations. Disclosure Of Future Unconditional Purchase Obligations [Line Items] Disclosure of Future Unconditional Purchase Obligations [line items] Technology-based intangible assets [member] Databases and Content [Member] Technology Assets [Member] Transfer of Certain Technology Assets Transfer of certain technology assets. Diverted profits tax paid. Diverted Profits Tax Paid Diverted profits tax paid Adjustments for other miscellaneous to reconcile profit (loss) to net cash flow from (used in) operating activities. Adjustments for other miscellaneous Other Disclosure Of Share Of Equity Investment [table] Disclosure Of Share Of Equity Investment [table] Disclosure Of Share Of Equity Investment [table] Gross financial assets subject to offsetting, enforceable master netting arrangements or similar agreements Gross Financial Assets Organization For Economic Cooperation And Development [Member] Cash flows from (used in) financing activities Net cash used in financing activities Cybersecurity Risk Management, Strategy, and Governance [Abstract] Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Fixed interest rate [member] Total Fixed [Member] Cybersecurity Risk Board of Directors Oversight [Text Block] Net defined benefit liability (asset) [axis] The disclosure of allowance for doubtful accounts explanatory. Disclosure Of Allowance For Doubtful Accounts Explanatory [Table Text Block] Summary of Change in Allowance for Doubtful Accounts Name of acquiree Name of acquiree Description of acquiree Description of acquiree Old Notes [Member] Old Notes. Other current financial assets Other financial assets - current Between one and two years [member] Between One And Two Years [Member] Between one and two years [member] Disclosure of range of exercise prices of outstanding share options [table] Effect of exchange rate changes on cash and cash equivalents Translation adjustments Disclosure of reconciliation of liabilities arising from financing activities [line items] Disclosure of reconciliation of liabilities arising from financing activities [Line Items] Classes of financial instruments [axis] Classes of financial instruments [axis] Borrowings, maturity Debt instrument, maturity year Maturity date Disclosure of financial instruments by type of interest rate [table] Tax on Equity Instruments [Member] Tax on equity instruments in OCI. Tax on Equity Instruments [Member] Schedule of key assumptions on which management has based its determination of fair value less costs of disposal for a cash-generating unit (group of units). Key assumptions are those to which the unit's (group of units') recoverable amount is most sensitive. [Refer: Cash-generating units [member]] Disclosure Of Key Assumptions Used In Performing Goodwill Impairment Explanatory [Table Text Block] Impairment Test of Goodwill- Key Assumptions Americas [Member] Americas [member] Cash Cash at bank and on hand Other inflows (outflows) of cash, classified as investing activities Other investing activities EMEA 1 [Member] EMEA 1 member. EMEA [Member] Five Point Five Zero Zero Debentures due 2035 [Member] Five Point Five Zero Zero Debentures due 2035. 5.500% Debentures due 2035 [Member] Basic earnings (loss) per share from discontinued operations From discontinued operations Description of maturity period for investments. Description of Maturity Period For Investments Maturity period of investments classified as cash and cash equivalents Foreign exchange gain losses on equity method investments. 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Percentage Of Participants In Defined Benefits Plans Total participation Intangible assets with indefinite useful life [axis] Intangible assets with indefinite useful life [axis] Intangible assets and goodwill [abstract] Actuarial gains (losses) arising from changes in financial assumptions, net defined benefit liability (asset) Due to financial assumption changes Actuarial (losses) gains from changes in financial assumptions Disclosure of major categories of defined benefit plan assets. Disclosure Of Major Categories Of Defined Benefit Plan Assets Explanatory [Text Block] Summary of Major Categories of Plan Assets for Funded Plans Income taxes Adjustments for income tax expense Assumption of perpetual growth rates. Assumption Of Perpetual Growth Rates Perpetual growth rate Subsidiaries [domain] Disclosure of transactions between related parties [line items] Disclosure of transactions between related parties [Line Items] Three point eight five notes due two thousand twenty four. Three Point Eight Five Notes Due Two Thousand Twenty Four [member] 3.85% Notes, due 2024 [member] Historical excluded equity adjustment. Historical Excluded Equity Adjustment Historical excluded equity adjustment Foreign currency Description of accounting policy for foreign currency translation [text block] Recovery period [Axis] Recovery Period [Axis] Goodwill recognised as of acquisition date Goodwill Earnings used to determine consolidated earnings per share and earnings per share from continuing operations. Disclosure of earnings per share from continuing operations explanatory Reconciliation of Earnings Used for Earnings per Share Calculations Disclosure of non-adjusting events after reporting period [line items] Disclosure of non-adjusting events after reporting period [Line Items] Four point five zero notes due two thousand forty three. 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Law Business [Member] Types of financial assets [axis] Employee related [Member] Employee Related [Member] Employee-related [member] Derivative financial liabilities Swaps Liabilities Total liabilities Disclosure of net defined benefit liability (asset) [abstract] Increase (decrease) through net exchange differences, other provisions Translation and other, net Contract cost [Member] Contract Cost [Member] Contract cost [member] Derivatives, amount contributed to fair value of plan assets Derivatives Shares in the investee company disposed during the period. Shares In The Investee Company Disposed During The Period Shares in the investee company disposed during the period Five point six five percent notes due two thousand and forty three. Five Point Six Five Percent Notes Due Two Thousand And Forty Three [Member] 5.65% Notes due 2043 [member] Accounting estimates [axis] Income taxes rate Tax rate Description of option pricing model, share options granted Fair Value Measure Disposal groups classified as held for sale [member] Disposals [member] LSEG data & analytics business. LSEG Data and Analytics Business [Member] LSEG Data & Analytics business [Member] Contingent Receivable The amount due upon achievement of certain milestones. Contingent receivable Increase (decrease) through business combinations, deferred tax liability (asset) Acquisitions Profit (loss), attributable to [abstract] Earnings (loss) attributable to: Liabilities arising from financing activities [domain] Material income and expense [abstract] Derecognition of deferred tax assets. Derecognition Of Deferred Tax Assets Unrecognized Deferred Tax Assets Unused tax losses for which no deferred tax asset recognised Unrecognized Deferred Tax Assets Disclosure of range of exercise prices of outstanding share options [text block] Summary of Additional Information Relating to Stock Option and SAR's Disclosure of disaggregation of revenue from contracts with customers [table] Disclosure of disaggregation of revenue from contracts with customers [table] New Legislation [Member] Between two and three years [member] Between Two And Three Years [Member] Between two and three years [member] Acquisitions. Acquisitions [Member] Acquisitions - Business Combinations [member] Disclosure of detailed information about business combination [table] Identifiable intangible assets Assets liabilities at amortized cost. 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Increase Decrease Through Net Exchange And Other Differences Allowance Account For Credit Losses Of Financial Assets Translation and other, net Translation and other, net Write-offs Allowance for credit losses Write-offs Allowance for credit losses Write-offs. 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Other Finance Income [Member] Other finance income [member] Other inflows (outflows) of cash, classified as financing activities Other financing activities Disclosure of income tax [text block] Taxation Cash and cash equivalents in subsidiary or businesses acquired or disposed  Cash and cash equivalents Supplemental cash flow information. Supplemental Cash Flow Information 1 [abstract] Supplemental cash flow information is provided in note 29. Plan income (expense) recognized in income statement. Plan Income Expense Recognized In Income Statement  Plan (expense) benefit recognized in income statement Document Type Document Type Taxation Information [Domain] Taxation Information [Domain] Increase through other contributions by owners, equity Non-controlling interests on acquisition of subsidiaries Details of defined benefit pension plan expense. Disclosure Of Defined Benefit Pension Plan Expense Explantaory [Text Block] Defined Benefit Plan Expense Provisions and other non current liabilities recognised as of acquisition date. Provisions And Other Non Current Liabilities Recognised As Of Acquisition Date Provisions and other non-current liabilities Description of useful life, intangible assets other than goodwill Prepaid expenses and other current assets [Abstract]. Prepaid Expenses And Other Current Assets [Abstract] Prepaid Expenses and Other Current Assets [abstract] EMEA [member] Europe, Middle East and Africa [Member] Europe, Middle East and Africa. Cash flows from (used in) investing activities Net cash (used in) provided by investing activities Disclosure of material accounting policy information [text block] Summary of Business and Material Accounting Policies Disclosure of detailed information about hedges [line items] Disclosure of detailed information about hedges [Line Items] Employee stock purchase plan. 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Disclosure of Fair Value Hierarchy [text block] Fair Value Hierarchy Type of measurement of expected credit losses [axis] Key management personnel compensation Total compensation Euro Member Countries, Euro Euros [member] Status Of Settlement Of Tax Dues [Domain] Retained earnings [member] Retained Earnings [Member] Lease liabilities [abstract] Lease liabilities included in the consolidated statement of financial position Other disposal. Other Disposal Other Document Financial Statement Error Correction [Flag] Categories of financial assets [domain] Categories of financial assets [domain] Adjustments for decrease (increase) in working capital and other items to reconcile profit (loss) to net cash flow from (used in) operating activities. Total adjustments for decrease (increase) in working capital and other items Total Types of risks [domain] Number of transactions investments in businesses. Number Of Transactions Investments In Businesses Investments in businesses Disclosure of number and weighted average exercise price of outstanding share awards. Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [Line Items] Three Point Three Five Percent Notes Due Two Thousand Twenty Six [Member] Three point three five percent notes due two thousand twenty six. 3.35% Notes, due 2026 [member] Disclosure of geographical areas [table] Disclosure of geographical areas [table] Percentage increase in effective tax rate. Increase In Effective Tax Rate Percentage of increase in effective tax rate Disclosure of trade and other payables [text block] Payables, Accruals and Provisions Due From Indemnification Arrangements Due From Indemnification Arrangements. Due from indemnification arrangement Other equity interest Historical excluded equity adjustment Disclosure of revenue [text block] Revenues Income tax relating to remeasurements of defined benefit plans included in other comprehensive income Deferred tax expense on remeasurement on defined benefit pension plans Related tax expense on remeasurement on defined benefit pension plans Non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets, and rights arising under insurance contracts Non-Current Assets Disclosure of other provisions, contingent liabilities and contingent assets [text block] Provisions and Other Non-Current Liabilities Disclosure of financial instruments by type of interest rate [abstract] Accumulated other comprehensive income Accumulated other comprehensive loss Number of transactions in contingent consideration payments. Number Of Transactions in Contingent consideration payments Deferred and contingent consideration payments Related party transactions [abstract] Ownership [Domain] Current tax relating to items credited (charged) directly to equity Current tax benefit on share-based payments Reportable segments adjusted EBITDA. Reportable Segments Adjusted EBITDA Reportable segments adjusted EBITDA Current Fiscal Year End Date Current Fiscal Year End Date Timing of transfer of goods or services [domain] Timing of transfer of goods or services [domain] Ranges of exercise prices for outstanding share options [axis] Finance income cost. Finance income cost [abstract] Finance costs, net: Dividends received from investments accounted for using equity method, classified as investing activities Proceeds from dividend from equity method investments Disclosure of expected impact of initial application of new standards or interpretations [text block] Accounting pronouncements effective in future periods Leases liabilities. Leases Liabilities [Member] Leases Liabilities [Member] Amount of decrease in income tax benefit and in earnings from continuing operations. Decrease Of Profit Loss From Continuing Operations Sensitivity to change in effective tax rate Segment consolidation. Segment Consolidation [Domain] Entity Address, State or Province Other non-current financial liabilities Other financial liabilities Other financial liabilities - non-current Investments accounted for using equity method [abstract] Cash flows from (used in) investing activities, discontinued operations Investing cash flows from discontinued operations Types of financial liabilities [domain] Leases as lessee, related party transactions Costs under lease arrangement Current liabilities Current liabilities Current liabilities Disclosure In Entirety Of Divestitures [Line Items] Disclosure in entirety of divestitures. Investment accounted for using equity method before equity adjustment. Investment Accounted For Using Equity Method Before Equity Adjustment Thomson Reuters $ share Gains or losses due to changes in foreign currency exchange rates on intercompany balances that arise in the ordinary course of business. Fair Value Adjustments Fair value adjustments (see note 5) Lease Retirement Obligations Expected Settlement Period Lease retirement obligations expected settlement period. Lease retirement provisions relate primarily to leases expiration period Disclosure of detailed information about components of operating expenses. Disclosure Of Detailed Information About Components Of Operating Expenses [text block] Components of Operating Expenses The amount of post-employment benefit expense relating to all benefit plans. Post Employment Benefit Expense Post-employment benefits Geographical [Axis] Geographical [Axis] Actuarial assumption of expected rates of inflation Inflation assumption Charges Additional provisions, other provisions Total additional provisions, other provisions Gains (losses) recognised when control of subsidiary is lost Gains (losses) recognised when control in subsidiary is lost Credit ratings on long-term debt description. Credit Ratings On Long term Debt Description Long-term debt Useful life measured as period of time, intangible assets other than goodwill Intangible assets useful lives Collateralized Borrowings. Collateralized Borrowings Other provisions Other provisions at end of period Other provisions at beginning of period Retrospective application and retrospective restatement [axis] Retrospective application and retrospective restatement [axis] Non-adjusting events after reporting period [axis] Non-adjusting events after reporting period [axis] Disclosure of detailed information about Payables Accruals And Provisions [text block] Disclosure of detailed information about Payables Accruals And Provisions [text block] Schedule of Payables, Accruals and Provisions Five Point Eight Five Zero Notes due 2040 [Member] Five Point Eight Five Zero Notes due 2040. 5.850% Notes due 2040 [Member] The disclosure of detailed information of trade and other receivables. Disclosure Detailed Information Of Trade And Other Receivables Explanatory [Table Text Block] Summary of Trade and Other Receivables Schedule of share repurchase information. Disclosure of share repurchases [text block] Details of NCIB Share Repurchases Other non-current payables Provisions and other non-current liabilities Total provisions and other non-current liabilities Borrowings term. BorrowingsTerm Borrowings term Disclosure of detailed information of prepaid expenses and other current assets explanatory [Table Text Block]. Disclosure Of Detailed Information Of Prepaid Expenses And Other Current Assets Explanatory [Table Text Block] Schedule of Prepaid Expenses and Other Current Assets Disclosure of trade and other receivables [text block] Trade and Other Receivables Continuing And Discontinued Operation [Domain] Payments to acquire or redeem entity's shares Share repurchases Repurchases of common shares Disclosure of reconciliation of changes in goodwill [text block] Summary of Goodwill Description of acquisitions completed [TableTextBlock] Description Of Acquisitions Completed [Table Text Block] Summary of Brief Description of the Most Significant Acquisition Text block1 [abstract]. Text Block1 [Abstract] Text block1 [abstract] Current tax assets, non-current Tax receivable Impact On Earnings Due To Changes In Foreign Currency Exchange Rates Due To Changes In Foreign Currency Exchange Rates. Impact On Earnings Due To Changes In Foreign Currency Exchange Rates Due To Changes In Foreign Currency Exchange Rates Total impact on earnings Four point five zero percent notes due two thousand and forty three Four Point Five Zero Percent Notes Due Two Thousand And Forty three [Member] 4.50% Notes due 2043 [member] Investments in associates accounted for using equity method Disclosure of range of exercise prices of outstanding share options [line items] Disclosure of range of exercise prices of outstanding share options [Line Items] Classes of contingent liabilities [domain] Number of shares issued to distribution to owners. Number Of Shares Issued To Distribution To Owners Return of capital, Number of Common Shares Contingent Receivables [Member] TRGP And TTC Plans [Member] TRGP and TTC Plans [Member] Debt Related Hedges Out flows. Debt Related Hedges Out flows Debt-related hedges outflows Disclosure of changes in accounting policies [abstract]. Disclosure of changes in accounting policies [abstract] Operating expense, excluding depreciation, amortization, and other Operating expense, excluding depreciation, amortization, and other Total operating expenses Operating expenses Increase (decrease) through net exchange differences, deferred tax liability (asset) Translation and other, net Actuarial assumptions [domain] Net financial liabilities subject to offsetting, enforceable master netting arrangements or similar agreements Net Amount Cash-generating units [domain] Disclosure of fair value of plan assets [table] Classes of liabilities [axis] Equity method investments. 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Reasonably Possible Increase In Basis Points Percentage of reasonably possible increase in unobservable input, assets Description of accounting policy for share-based payment transactions [text block] Share-based compensation plans Total additional provisions reversal during the period. Total Additional Provisions Reversal During The Period Charges Range [axis] Range [axis] Weighted average duration of defined benefit obligation Amounts payable, related party transactions Payables to related parties Basic earnings per share [abstract] Basic earnings per share: Disclosure of life expectation of an average plan participant explanatory. Disclosure Of Life Expectation Of An Average Plan Participant Explanatoy [Text Block] Summary of Life Expectation in Years of an Average Plan Participant Additive AI, Inc. [Member] Additive AI, Inc. [Member] Disclosure of operating segments [abstract] Five point eight five percent two thousand and forty. 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Required ratio of net debt to ebitda Required ratio of net debt to ebitda 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 net earnings: Description of accounting policy for employee benefits [text block] Employee future benefits Scenario [Domain] Disclosure of net defined benefit liability (asset) [table] Other comprehensive income [abstract] Other comprehensive income (loss) Miscellaneous other provisions [member] Other [member] Contingent consideration [member] Contingent consideration payments [member] Shares Issued Or Purchased By Type [Axis] Electronic, software and services [member] Electronic Software And Services [Member] Electronic, software and services [member] Level 1 of fair value hierarchy [member] Level 1 [member] Description of how entity establishes hedge ratio and what sources of hedge ineffectiveness are Hedge ratio description Market approach [member] Disclosure of related party [text block] Related Party Transactions Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Disclosure of offsetting of financial assets [text block] Disclosure of Offsetting of Financial Assets Tax effect of Net non-deductible (non-taxable) foreign exchange and other losses (gains) Tax Effect Of Net Non deductible Non taxable Foreign Exchange And Other Losses Gains Net non-taxable foreign exchange and other gains and losses Tax Authority Name [Axis] Disclosure of issued capital [text block] Summary of Change in Capital Characteristics of defined benefit plans [axis] Disclosure of other non-current assets [text block] Other Non-Current Assets Dividend income Dividend income Disclosure of products and services [line items] Disclosure of products and services [Line Items] Description of vesting requirements for share-based payment arrangement Vesting period Corporate costs. 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Equity Method Investment Co Ventures [Domain] Financial liabilities recognised as of acquisition date Other financial liabilities Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Treasury stock activity by type [axis] Treasury stock activity by type [axis] Treasury stock activity by type [axis] Share premium [member] Contributed Surplus [Member] Amortization of computer software. Amortization Of Computer Software Amortization of software Amortization of software Number of Reportable Segment Number of reportable segment. Number of reportable segments Equity Balance Balance Total equity Increase (decrease) through treasury share transactions, equity Combined with share repurchase agreement. Increase (decrease) through treasury share transactions, equity Combined with share repurchase agreement Repurchases of common shares, number of shares Net debt Net debt Primary debt instruments. Primary Debt Instruments [member] Primary debt instruments [member] Provision for uncertain tax positions. Provision For Uncertain Tax Positions Provision for uncertain tax positions Classes of property, plant and equipment [domain] Classes of property, plant and equipment [domain] The disclosure of detailed information of aging of trade receivables. Disclosure Of Detailed Information Of Aging Of Trade Receivables Explanatory [Table Text Block] Summary of Aging of Trade Receivables Tax effect from change in tax rate Impact of changes in tax laws and rates Not internally generated [member] Purchased [member] Summary financial Information. Summary Financial Information [Table Text Block] Summary Financial Information Contingent liabilities recognised as of acquisition date Fair value of contingent consideration Contingent consideration Intangible assets with indefinite useful life [domain] Intangible assets with indefinite useful life [domain] Fixed to Floating Interest Rate Swaps [Member] Fixed-to-floating interest rate swaps. Fixed-to-floating interest rate swaps [member] Disclosure of detailed information of post tax earnings in its YPL investment. Disclosure Of Detailed Information Of Post Tax Earnings In Its Ypl Investment [Table Text Block] Disclosure of Detailed Information of Post Tax Earnings in its YPL Investment Description of criteria period for contract cost recognized as asset. Description Of Criteria Period For Contract Cost Recognized As Asset Criteria period for contract cost recognized as asset. Proceeds from borrowings, classified as financing activities Proceeds from commercial paper Percentage of voting equity interests acquired Percentage of voting equity interests acquired Long-term provisions Provisions Plan assets, at fair value Fair value of plan assets Total Acquisition [Axis] Tax on Remeasurement of Defined Benefit Plans [Member] Tax on Remeasurement of Defined Benefit Plans. Tax on Remeasurement of Defined Benefit Plans [Member] Disclosure of changes in accounting estimates [line items] Disclosure of changes in accounting estimates [Line Items] Pagero group ab. Pagero Group AB [Member] Pagero [Member] Retained earnings Retained earnings Life expectation period of female employees retiring at age sixty five Life Expectation Period Of Female Employees Retiring At Age Sixty Five Female employee retiring at age 65 Analysis of income and expense [abstract] Other finance cost Other Deferred tax liabilities recognised as of acquisition date Deferred tax Trade receivables Trade receivables Gross trade receivables Safe send. Safe Send [Member] Safe Send [Member] Other noncurrent assets. Other Noncurrent Assets [abstract] Disclosure of terms and conditions of share-based payment arrangement [text block] Stock Incentive Plans Equity and liabilities [abstract] LIABILITIES AND EQUITY Later than three year [member] Later Than Three Year [Member] Later than three year [member] Debt Before Currency Hedging Arrangements. Debt Before Currency Hedging Arrangements Borrowings before currency hedging arrangements Computer equipment [member] Computer equipment [member] Computer Equipment [Member] Ten Percentage Weakening In Foreign Currency Vs Us Ten Percentage Weakening In Foreign Currency Vs Us [Member] Ten percentage weakening in foreign currency vs us [member] Period. Period [Member] Period [member] Tax Losses and Other Attributes. Tax Losses and Other Attributes [Member] Tax Losses and Other Attributes [Member] DisclosureOfNumberAndWeightedAverageExercisePriceOfOutstandingAwards. DisclosureOfNumberAndWeightedAverageExercisePriceOfOutstandingAwards [Table] Title of Individual [Domain] Disclosure of detailed information about property, plant and equipment [table] Number of Repurchased Common Shares Number of repurchased common shares. Repurchased common shares City Area Code Disclosure of reconciliation of changes in goodwill [line items] Disclosure of reconciliation of changes in goodwill [Line Items] Accumulated depreciation, amortisation and impairment [member] Accumulated Depreciation [Member] Current borrowings Current indebtedness Current indebtedness Dividends Declared After Year Ended [Member] Dividends declared after year ended [member] Auditor Name New IFRSs [axis] New IFRSs [axis] Defined Benefit Plans Additional Information [Axis] Disclosure of information for cash-generating units [text block] Summary of Carrying Amount of Goodwill by Cash Generating Unit Vesting period of other equity instrument. Vesting Period Of Other Equity Instrument Vesting period Cash-generating units [axis] Disclosure of detailed information about hedges [abstract] Share redemption price. Share Redemption Price Redemption price of shares The disclosure of detailed information about other non-current assets. Disclosure of Detailed Information About Other Non-Current Assets [text block] Summary of Other Non-Current Assets Income approach [member] Purchase of property, plant and equipment, classified as investing activities Capital expenditures Actuarial gains (losses) arising from changes in demographic assumptions, net defined benefit liability (asset)  Actuarial gains from changes in demographic assumptions Due to demographic assumption changes Elite [Member] Elite [Member] Short-term investments, classified as cash equivalents Money market accounts Short-term Investments, cash and cash equivalents Repayments of borrowings, classified as financing activities Repayments of debt Disclosure of analysis of single amount of discontinued operations [abstract] State Net Operating Losses. State Net Operating Losses [Member] U.S. state net operating losses [member] Non-current liabilities Non-current liabilities Statement of cash flows [abstract] Disclosure of derivative financial instruments [text block] Fair Value Gains and Losses from Derivative Financial Instruments Other banking arrangements, classified as cash equivalents Money market accounts and other securities Interest costs [abstract] Interest expense: Reconciliation of income before tax multiplied by applicable Canadian corporate tax rate to total tax expense (benefit). Disclosure Of Reconciliation Of Income Tax Expense Benefit Explanatory [Text Block] Schedule of Reconciliation of Income Tax Expense Benefit Fair value financial instruments designated as hedging instruments. Fair Value Financial Instruments Designated As Hedging Instruments Derivatives used for hedging Description of accounting policy for termination benefits [text block] Termination benefits Allowance for credit losses [member] Restricted cash and cash equivalents Restricted cash and cash equivalents Gains (losses) on cash flow hedges, before tax Cash flow hedges adjustments to equity Key management personnel compensation, share-based payment Share-based payments Other comprehensive income, before tax, gains (losses) from investments in equity instruments Fair value adjustments on financial assets Borrowings, interest rate Debt instrument, interest rate Weighted-Average Interest Rate Classes of assets [axis] Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements Net Amount, Financial Assets Disclosure in entirety of divestitures. Disclosure In Entirety Of Divestitures Explanatory Divestitures Reconciliation of changes in deferred tax liability. Disclosure Of Movements Of Deferred Tax Liabilities Explanatory [Table Text Block] Summary of Movements of Deferred Income Tax Liabilities Scenario Forecast one [membe]. Scenario Forecast one [Member] Scenario Forecast [Member] Disclosure Of Net Defined Benefit Liability Asset [Line Items] Disclosure of net defined benefit liability (asset) [Line Items] Debt instruments held Total debt instruments held Securities held Net deferred tax assets Net deferred tax assets Non-adjusting events after reporting period [domain] Derivatives Hedge Ratio Derivatives hedge ratio. Derivatives hedge ratio Previously Held Financial Assets Measured At Fair Value Through Other Comprehensive Income. Previously Held Financial Assets Measured At Fair Value Through Other Comprehensive Income  Less: Fair value of previously held financial asset through other comprehensive income Disclosure Of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [Table] Tax On Changes in Statutory Inter Company Investment Values Tax on changes in statutory inter company investment values. Tax expense on changes in statutory intercompany investment values Cash flows from (used in) operating activities [abstract] OPERATING ACTIVITIES Decrease through other distributions to owners, equity Return of capital Return of capital on common shares (see note 25) Expected volatility, share options granted Volatility factor Trade and other receivables Trade and other receivables Trade and other receivables Disclosure of nature and extent of risks arising from financial instruments [abstract] Gains or losses due to changes in foreign currency exchange rates on intercompany balances that arise in the ordinary course of business. Fair Value Adjustment Fair value adjustments Assets (liabilities) at fair value through earnings. Assets Liabilities At Fair Value Through Earnings [member] Assets/ (Liabilities) at Fair Value through Earnings [member] Level 2 of fair value hierarchy [member] Level 2 [member] Disclosure of products and services [table] Recovery period. Recovery Period [Member] Disclosure of detailed information about intangible assets [text block] Summary of Other Identifiable Intangible Assets Summary of Software Comprehensive income, attributable to non-controlling interests Non-controlling interests Notes And Debentures [Member] Notes and Debentures [Member] Disclosure of detailed information of post tax earnings losses in equity method investments [text block] Disclosure of detailed information of post tax earnings losses in equity method investments [text block] Share of Post-tax Earnings (Losses) in Equity Method Investments Reported in Consolidated Income Statement Entity Primary SIC Number Increase (decrease) through other changes, liabilities arising from financing activities Other, net Goodwill expected to be deductible for tax purposes Range six. Range Six [Member] 155.01 - $160.00 [Member] Assets and liabilities classified held for sale Assets and Liabilities Classified Held for Sale [Axis] Disclosure of disaggregation of revenue from contracts with customers [abstract] Operating Expenses 1 [abstract] Operating Expenses 1 [abstract] Five point six five notes due two thousand forty three. Five Point Six Five Notes Due Two Thousand Forty Three [member] 5.65% Notes, due 2043 [member] Auditor Location Internally generated [member] Internally Developed [member] Disclosure In Entirety Of Disposals Explanatory Disclosure in entirety of disposals explanatory Disposals Disclosure on movements in provisions explanatory. Disclosure on Movements in Provisions Explanatory Summary of Movement in Provisions Disclosure of Future Unconditional Purchase Obligations. Disclosure Of Future Unconditional Purchase Obligations Explanatory [Text Block] Summary of Future Unconditional Purchase Obligations Maximum number of common shares available for grant. Maximum Number Of Common Shares Available For Grant Maximum number of common shares available for grant Actuarial assumptions [axis] Disclosure of detailed information about hedges [table] Property and equipment acquired. Property And Equipment Acquired Property and equipment Other non-current assets Other non-current assets Total other non-current assets Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities Business Acquired Acquisitions, net of cash acquired Adjustments for deferred tax expense Deferred tax Disclosure of other operating income [text block] Other Operating Gains, Net Major components of tax expense (income) [abstract] Deferred tax assets Deferred tax Deferred tax asset Financial assets (liabilities), net. Financial Assets Liabilities Net Total Disclosure of transactions between related parties [table] Disclosure of transactions between related parties [table] Entity Interactive Data Current Opening balance equity investment. Opening Balance Equity Investment Opening balance equity investment Other receivables from indemnification arrangement and contingent receivables. Other Receivables From Indemnification Arrangement And Contingent Receivables Other receivables Financial liabilities at fair value through profit or loss Financial liabilities at fair value through earnings Disclosure of changes in working capital and other items [text block]. Disclosure Of Changes In Working Capital And Other Items [text block] [Text Block] Details of Changes in Working Capital and Other Items Tax on Cash Flow Hedges [Member] Tax on Cash Flow Hedges in OCI. Common Shares Repurchased, Maximum Common shares repurchased, maximum. Common shares repurchased, maximum value Measurement [axis] Measurement [axis] Tax effect of foreign tax rates Income taxes recorded at rates different from the Canadian tax rate Increase (decrease) through net exchange differences, intangible assets other than goodwill Translation and other, net Others. Others [member] Other [member] Disclosure of business combinations [text block] Acquisitions Asset Acquisition [Member] Asset acquisition [member] Disclosure of quantitative information about right-of-use assets [text block] Disclosure of carrying amount and related depreciation Financial assets measured at fair value through other comprehensive income decreased from asset disposals Financial Assets Measured At Fair Value Through Other Comprehensive Income Decreased From Asset Disposals Financial Assets Measured At Fair Value Through Other Comprehensive Income Decreased From Asset Disposals Capital Losses. Capital Losses [Member] Capital Losses [member] Other Operating Income Expense [Domain] Disposals, property, plant and equipment Disposals, property, plant and equipment Disposals of businesses and property Disposals of businesses and property Business combinations [member] Presentation of leases for lessee [abstract] Acquisitions through business combinations, intangible assets other than goodwill Acquisitions Elite business. Elite Business [member] Disclosure of classes of share capital [abstract] Issued capital [member] Stated Share Capital [Member] Entity Tax Identification Number Income Statement Location [Axis] Disclosure in tabular form of consideration received on disposal of business. Disclosure In Tabular Form Of Consideration Received On Disposal Of Business [Table] Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, assets Increase decrease in fair value measurement due to reasonably possible increase in unobservable inputs recognized in profit or loss before tax assets Later than four years and not later than five years [member] Between 4 and 5 years [Member] Later than Four Years and not Later than Five Years [Member] Time based restricted share unit. Time Based Restricted Share Unit [Member] TSRUs [Member] Global Prints [Member] Global prints. Global Print [member] Weighted average remaining contractual life of outstanding share options Weighted-Average Remaining Life Percentage of ownership held by related party. Percentage of ownership held by related party Beneficial ownership of shares Borrowings Expiration Month And Year Borrowings expiration month and year. Borrowings expiration month and year Interest expense on borrowings Debt Local Phone Number Other current liabilities Other current liabilities Tax value. Tax Value Operating Losses Tax Value Amended Credit Facility Maturities In November Two Thousand Thirty [Member] Amended Credit Facility Maturities In November 2030 [Member] Auditor Opinion [Text Block] Actuarial assumption of expected rates of pension increases Rate of increase in pension payments Disclosure of changes in working capital and other items. Disclosure Of Changes In Working Capital And Other Items [abstract] Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed Total assets Schedule of changes in net defined benefit obligation explanatory Schedule Of Changes In Net Defined Benefit Obligation Explanatory Net Defined Benefit Plan Obligations Lease extended term month and year Lease extended term month and year. Identifiable assets acquired (liabilities assumed) Net assets acquired Percentage of discount allowed for employee stock purchase plan. Percentage Of Discount Allowed For Employee Stock Purchase Plan Percentage of discount allowed for purchase of shares Employee benefits expense Total staff costs Lease agreement [member] Lease agreement. Other comprehensive income that will be reclassified to profit or loss, net of tax Other comprehensive income that will be reclassified to profit or loss, net of tax Adjustments to reconcile profit (loss) [abstract] Adjustments for: Disclosure of sensitivity analysis for actuarial assumptions [table] Five Point Six Five Zero Notes due 2043 [Member] Five Point Six Five Zero Notes due 2043. 5.650% Notes due 2043 [Member] Transaction costs Debt-offer Transaction Costs Transaction costs from exchange offer reflected as a reduction of long-term debt. Continuing And Discontinued Operation [Axis] Continuing and discontinued operations [axis] Disclosure of business description and basis of presentation. Disclosure of business description and basis of presentation [line items] Disclosure of business description and basis of presentation [line items] Segmented employee benefits expense. Segmented Employee Benefits Expense Staff costs Disclosure of weighted average fair value. Disclosure of Weighted average fair value [abstract] Current assets Current assets Current assets Liabilities arising from financing activities [axis] Levels of fair value hierarchy [domain] Levels of fair value hierarchy [domain] Disclosure of information for cash-generating units [line items] Percentage of valuation technique Disclosure of information for cash-generating units [Line Items] Investment funds, amount contributed to fair value of plan assets Multi-asset Impact On Earnings From Nonpermanent Inter company Loans Due To Changes In Foreign Currency Exchange Rates. Impact On Earnings From Nonpermanent Inter company Loans Due To Changes In Foreign Currency Exchange Rates Non-permanent intercompany loans Entity Emerging Growth Company Entity Emerging Growth Company Financial assets at fair value through profit or loss Financial assets at fair value through earnings Number of transactions business acquired purchase price. Number of Transactions Business Acquired Purchase Price Businesses acquired, net of cash Description of types of hedge. Description Of Types Of Hedge Hedged Risk