THOMSON REUTERS CORP /CAN/ (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 1001 - Document - Document and Entity Information Network

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2 Implied Table Table

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3 Document and entity information [abstract] Abstract tri:DocumentAndEntityInformationAbstract
4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
14 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
15 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
16 1003 - Statement - Consolidated Income Statement Network

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17 Statement [table] Table

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18 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
19 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
20 Computer software [member] Member ifrs-full:ComputerSoftwareMember
21 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
22 Statement [LineItems] LineItems tri:StatementLineItems
23 CONTINUING OPERATIONS Abstract ifrs-full:ProfitLossAbstract
24 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
25 Operating expenses Concept (Monetary) For Period Debit tri:OperatingExpenseExcludingDepreciationAmortizationAndOther
26 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
27 Amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
28 Other operating gains, net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
29 Operating profit Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
30 Finance costs, net: Abstract tri:FinanceIncomeCostAbstract
31 Net interest expense Concept (Monetary) For Period Credit ifrs-full:InterestRevenueExpense
32 Other finance income (costs) Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
33 Income before tax and equity method investments Concept (Monetary) For Period Credit tri:ProfitLossFromContinuingOperationsBeforeIncomeTaxExpenseOrIncomeAndBeforeTheCompanyShareOfPosttaxEarningsOrLossesFromEquitymethodInvestments
34 Share of post-tax losses in equity method investments Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
35 Tax (expense) benefit Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
36 Earnings from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
37 Earnings from discontinued operations, net of tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
38 Net earnings Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
39 Earnings attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
40 Common shareholders Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
41 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
42 Earnings per share: Abstract ifrs-full:EarningsPerShareAbstract
43 Basic and diluted earnings per share Abstract ifrs-full:BasicAndDilutedEarningsPerShareAbstract
44 From continuing operations Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShareFromContinuingOperations
45 From discontinued operations Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShareFromDiscontinuedOperations
46 Basic and diluted earnings per share Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
47 1004 - Statement - Consolidated Statement of Comprehensive Income Network

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48 Statement [table] Table

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52 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
53 Statement [LineItems] LineItems tri:StatementLineItems
54 Net earnings Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
55 Other comprehensive income (loss): Abstract ifrs-full:OtherComprehensiveIncomeAbstract
56 Items that have been or may be subsequently reclassified to net earnings: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
57 Cash flow hedges adjustments to net earnings Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax
58 Cash flow hedges adjustments to equity Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
59 Foreign currency translation adjustments to equity Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
60 Share of other comprehensive loss in equity method investments Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax
61 Related tax benefit on share of other comprehensive loss in equity method investments Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss
62 Reclassification of foreign currency translation adjustments on disposal of business Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationNetOfTax
63 Other comprehensive income that will be reclassified to profit or loss, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
64 Items that will not be reclassified to net earnings: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
65 Fair value adjustments on financial assets Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
66 Remeasurement on defined benefit pension plans Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
67 Related tax expense on remeasurement on defined benefit pension plans Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
68 Share of other comprehensive loss in equity method investments Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax
69 Related tax benefit on share of other comprehensive loss in equity method investments Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss
70 Other comprehensive income that will not be reclassified to profit or loss, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
71 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
72 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
73 Comprehensive income for the period attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
74 Common shareholders: Abstract tri:CommonShareholdersAbstract
75 Common shareholders Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
76 Non-controlling interests Abstract tri:NonControllingInterestsAbstract
77 Non-controlling interests - discontinued operations Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
78 1005 - Statement - Consolidated Statement of Financial Position Network

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79 Implied Table Table

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80 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
81 Assets Abstract ifrs-full:AssetsAbstract
82 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
83 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
84 Other financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
85 Prepaid expenses and other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
86 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
87 Computer hardware and other property, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
88 Computer software, net Concept (Monetary) As Of Debit ifrs-full:ComputerSoftware
89 Other identifiable intangible assets, net Concept (Monetary) As Of Debit ifrs-full:OtherIntangibleAssets
90 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
91 Equity method investments Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
92 Other financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
93 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
94 Deferred tax Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
95 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
96 LIABILITIES AND EQUITY Abstract ifrs-full:EquityAndLiabilitiesAbstract
97 Liabilities Abstract ifrs-full:LiabilitiesAbstract
98 Current indebtedness Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
99 Payables, accruals and provisions Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
100 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
101 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
102 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
103 Long-term indebtedness Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
104 Provisions and other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
105 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
106 Deferred tax Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
107 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
108 Equity Abstract ifrs-full:EquityAbstract
109 Capital Concept (Monetary) As Of Credit tri:Capital1
110 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
111 Accumulated other comprehensive loss Concept (Monetary) As Of Credit ifrs-full:AccumulatedOtherComprehensiveIncome
112 Total shareholders' equity Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
113 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
114 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
115 Total liabilities and equity Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
116 Contingencies (note 30) Concept (Monetary) As Of tri:Contingencies
117 1006 - Statement - Consolidated Statement of Cash Flow Network

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118 Statement [table] Table

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119 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
120 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
121 Computer software [member] Member ifrs-full:ComputerSoftwareMember
122 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
123 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
124 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
125 Substantial issuer bid/tender offer [member] Member tri:SubstantialIssuerBidOfferMember
126 Return of capital [member] Member tri:ReturnOfCapitalMember
127 Share repurchases [member] Member tri:ShareRepurchasesMember
128 Preference shares [member] Member ifrs-full:PreferenceSharesMember
129 Number of common shares [member] Member ifrs-full:OrdinarySharesMember
130 Statement [LineItems] LineItems tri:StatementLineItems
131 OPERATING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
132 Earnings from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
133 Adjustments for: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
134 Depreciation Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationExpense
135 Amortization expense Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForAmortisationExpense
136 Net gains on disposals of businesses and investments Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
137 Deferred tax Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxExpense
138 Other Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsToReconcileProfitLoss
139 Pension contribution Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities
140 Changes in working capital and other items Concept (Monetary) For Period Credit tri:IncreaseDecreaseInWorkingCapitalAndOtherItems
141 Operating cash flows from continuing operations Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInOperatingActivitiesContinuingOperations
142 Operating cash flows from discontinued operations Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations
143 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
144 INVESTING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
145 Acquisitions, net of cash acquired Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
146 Proceeds from disposals of businesses and investments Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
147 Capital expenditures Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
148 Proceeds from disposals of property and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
149 Other investing activities Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
150 Investing cash flows from continuing operations Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivitiesContinuingOperations
151 Investing cash flows from discontinued operations, net of taxes paid Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations
152 Net cash provided by (used in) investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
153 FINANCING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
154 Proceeds from debt Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
155 Repayments of debt Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
156 Net (repayments) borrowings under short-term loan facilities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings
157 Payments on common shares Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
158 Dividends paid Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
159 Other financing activities Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
160 Financing cash flows from continuing operations Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivitiesContinuingOperations
161 Financing cash flows from discontinued operations Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations
162 Net cash used in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
163 Increase (decrease) in cash and bank overdrafts Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
164 Translation adjustments Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
165 Cash and bank overdrafts at beginning of period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
166 Cash and bank overdrafts at end of period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
167 Cash and bank overdrafts at end of period comprised of: Abstract ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPositionAbstract
168 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
169 Bank overdrafts Concept (Monetary) As Of Credit ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
170 Cash and bank overdrafts at end of period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
171 Supplemental cash flow information is provided in note 28. Abstract tri:SupplementalCashFlowInformation1Abstract
172 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsOperatingActivities
173 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
174 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefund
175 1007 - Statement - Consolidated Statement of Changes in Equity Network

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176 Statement [table] Table

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177 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
178 Equity [member] Member ifrs-full:EquityMember
179 Stated share capital [member] Member ifrs-full:IssuedCapitalMember
180 Contributed surplus [member] Member ifrs-full:SharePremiumMember
181 Total capital [member] Member tri:TotalCapitalMember
182 Retained earnings [member] Member ifrs-full:RetainedEarningsMember
183 Unrecognized gain (loss) on financial instruments [member] Member tri:ReserveOfGainsAndLossesOnFinancialInstrumentsMember
184 Foreign currency translation adjustments [member] Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
185 Total accumulated other comprehensive loss AOCL [member] Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
186 Shareholders' equity [member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
187 Non-controlling interests [member] Member ifrs-full:NoncontrollingInterestsMember
188 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
189 Currently stated [member] Member ifrs-full:RestatedMember
190 Adjustments Due to Adoption of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
191 After IFRS 15 adoption [member] Member tri:AfterIfrs15AdoptionMember
192 Impact of IFRS 2 amendments [member] Member ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
193 After IFRS 2 amendments [member] Member tri:AfterIFRS2AmendmentsMember
194 Treasury stock activity by type [axis] Axis tri:TreasuryStockActivityByTypeAxis
195 Treasury stock activity by type [domain] Member tri:TreasuryStockActivityByTypeDomain
196 Substantial issuer bid/tender offer [member] Member tri:SubstantialIssuerBidTenderOfferMember
197 Return of capital on common shares [member] Member tri:ReturnOfCapitalOnCommonSharesMember
198 Repurchases of common shares [member] Member tri:RepurchasesOfCommonSharesMember
199 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
200 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
201 Preference shares [member] Member ifrs-full:PreferenceSharesMember
202 Number of common shares [member] Member ifrs-full:OrdinarySharesMember
203 Statement [LineItems] LineItems tri:StatementLineItems
204 Balance Concept (Monetary) As Of Credit ifrs-full:Equity
205 Net earnings Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
206 Other comprehensive (loss) income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
207 Total comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
208 Change in ownership interest of subsidiary Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
209 Distributions to non-controlling interests Concept (Monetary) For Period Debit ifrs-full:DividendsRecognisedAsDistributionsToNoncontrollingInterests
210 Increase (decrease) through treasury share transactions Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions
211 Dividends declared Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
212 Shares issued under Dividend Reinvestment Plan ("DRIP") Concept (Monetary) For Period Credit tri:SharesIssuedUnderDividendReinvestmentPlan
213 Pre-defined share repurchase plan Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
214 Stock compensation plans Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
215 Balance Concept (Monetary) As Of Credit ifrs-full:Equity
216 1008 - Disclosure - Summary of Business and Significant Accounting Policies Network

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220 1009 - Disclosure - Critical Accounting Estimates and Judgments Network

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224 1010 - Disclosure - Recent Accounting Pronouncements Network

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228 1011 - Disclosure - Revenues Network

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232 1012 - Disclosure - Segment Information Network

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236 1013 - Disclosure - Operating Expenses Network

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240 1014 - Disclosure - Other Operating Gains, Net Network

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244 1015 - Disclosure - Finance Costs, Net Network

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248 1016 - Disclosure - Equity Method Investments Network

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252 1017 - Disclosure - Taxation Network

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256 1018 - Disclosure - Discontinued Operations Network

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260 1019 - Disclosure - Earnings Per Share Network

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264 1020 - Disclosure - Cash and Cash Equivalents Network

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268 1021 - Disclosure - Trade and Other Receivables Network

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272 1022 - Disclosure - Prepaid Expenses and Other Current Assets Network

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274 Text block [abstract] Abstract tri:TextBlockAbstract
275 Prepaid Expenses and Other Current Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
276 1023 - Disclosure - Computer Hardware and Other Property Network

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277 Implied Table Table

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278 Text block [abstract] Abstract tri:TextBlockAbstract
279 Computer Hardware and Other Property Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
280 1024 - Disclosure - Intangible Assets Network

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281 Statement [table] Table

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282 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
283 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
284 Computer software [member] Member ifrs-full:ComputerSoftwareMember
285 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
286 Statement [LineItems] LineItems tri:StatementLineItems
287 Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
288 1025 - Disclosure - Goodwill Network

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289 Implied Table Table

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290 Text block [abstract] Abstract tri:TextBlockAbstract
291 Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGoodwillExplanatory
292 1026 - Disclosure - Financial Instruments Network

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293 Implied Table Table

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294 Text block [abstract] Abstract tri:TextBlockAbstract
295 Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
296 1027 - Disclosure - Other Non-Current Assets Network

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297 Implied Table Table

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298 Text block [abstract] Abstract tri:TextBlockAbstract
299 Other Non-Current Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
300 1028 - Disclosure - Payables, Accruals and Provisions Network

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301 Implied Table Table

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302 Text block [abstract] Abstract tri:TextBlockAbstract
303 Payables, Accruals and Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
304 1029 - Disclosure - Provisions and Other Non-Current Liabilities Network

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305 Implied Table Table

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306 Text block [abstract] Abstract tri:TextBlockAbstract
307 Provisions and Other Non-Current Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory
308 1030 - Disclosure - Deferred Tax Network

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309 Implied Table Table

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310 Text block [abstract] Abstract tri:TextBlockAbstract
311 Deferred Tax Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
312 1031 - Disclosure - Capital Network

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313 Implied Table Table

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314 Text block [abstract] Abstract tri:TextBlockAbstract
315 Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
316 1032 - Disclosure - Share-Based Compensation Network

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317 Implied Table Table

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318 Text block [abstract] Abstract tri:TextBlockAbstract
319 Share-Based Compensation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
320 1033 - Disclosure - Employee Benefit Plans Network

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321 Implied Table Table

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322 Text block [abstract] Abstract tri:TextBlockAbstract
323 Employee Benefit Plans Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
324 1034 - Disclosure - Supplemental Cash Flow Information Network

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325 Implied Table Table

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326 Text block [abstract] Abstract tri:TextBlockAbstract
327 Supplemental Cash Flow Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
328 1035 - Disclosure - Acquisitions Network

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329 Implied Table Table

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330 Text block [abstract] Abstract tri:TextBlockAbstract
331 Acquisitions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBusinessCombinationsExplanatory
332 1036 - Disclosure - Contingencies, Commitments and Guarantees Network

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333 Implied Table Table

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334 Text block [abstract] Abstract tri:TextBlockAbstract
335 Contingencies, Commitments and Guarantees Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
336 1037 - Disclosure - Related Party Transactions Network

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337 Implied Table Table

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338 Text block [abstract] Abstract tri:TextBlockAbstract
339 Related Party Transactions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
340 1038 - Disclosure - Subsequent Events Network

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341 Implied Table Table

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342 Text block [abstract] Abstract tri:TextBlockAbstract
343 Subsequent Events Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
344 1039 - Disclosure - Summary of Business and Significant Accounting Policies (Policies) Network

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345 Implied Table Table

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346 Text block [abstract] Abstract tri:TextBlockAbstract
347 Basis of Presentation 1 Concept (Text Block (HTML)) For Period ifrs-full:StatementOfIFRSCompliance
348 Basis of Presentation 2 Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReclassificationsOrChangesInPresentationExplanatory
349 Changes in accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations
350 Principles of consolidation Concept (Text Block (HTML)) For Period tri:DescriptionOfAccountingPolicyForPrinciplesOfConsolidationExplanatory
351 Operating segments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
352 Foreign currency Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
353 Revenue recognition Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
354 Employee future benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
355 Share-based compensation plans Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
356 Termination benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTerminationBenefits
357 Profit sharing and bonus plans Concept (Text Block (HTML)) For Period tri:DescriptionOfAccountingPolicyForProfitSharingAndBonusPlansExplanatory
358 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
359 Trade receivables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
360 Computer hardware and other property Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
361 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
362 Impairment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
363 Disposal of long-lived assets and discontinued operations Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory
364 Trade payables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
365 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
366 Indebtedness Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory
367 Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
368 Financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory
369 Derivative financial instruments and hedging Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory
370 Derivatives that do not qualify for hedge accounting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory
371 Taxation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
372 Critical judgments in applying accounting policies Concept (Text Block (HTML)) For Period tri:DescriptionOfAccountingPolicyForCriticalAccountingEstimatesAndJudgementsExplanatory
373 Recent Accounting Pronouncements Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
374 1040 - Disclosure - Summary of Business and Significant Accounting Policies (Tables) Network

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375 Implied Table Table

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376 Text block [abstract] Abstract tri:TextBlockAbstract
377 Schedule of Computer Hardware and Other Property - Estimated Useful Lives Concept (Text Block (HTML)) For Period tri:DisclosureOfPropertyPlantAndEquipmentEstimatedUsefulLifeExplanatory
378 Schedule of Other Identifiable Assets - Estimated Useful Lives Concept (Text Block (HTML)) For Period tri:DisclosureOfOtherIdentifiableIntangibleAssetsExplanatory
379 1041 - Disclosure - Revenues (Tables) Network

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380 Implied Table Table

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381 Text block [abstract] Abstract tri:TextBlockAbstract
382 Summary of Revenues by Type and Geography Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory
383 Summary of Remaining Performance Obligations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPerformanceObligationsExplanatory
384 1042 - Disclosure - Segment Information (Tables) Network

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385 Implied Table Table

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386 Text block [abstract] Abstract tri:TextBlockAbstract
387 Revenues and Adjusted EBITDA by Segment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
388 Schedule of Other Required Segment Data Concept (Text Block (HTML)) For Period tri:DisclosureOfOtherReportableSegmentDataExplanatory
389 Summary of geographical information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
390 Summary of Revenues by Classes of Similar Products or Services Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProductsAndServicesExplanatory
391 1043 - Disclosure - Operating Expenses (Tables) Network

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392 Implied Table Table

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393 Text block [abstract] Abstract tri:TextBlockAbstract
394 Components of Operating Expenses Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutComponentsOfOperatingExpensesExplanatory
395 1044 - Disclosure - Finance Costs, Net (Tables) Network

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396 Implied Table Table

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397 Text block [abstract] Abstract tri:TextBlockAbstract
398 Components of Finance Costs, Net, Include Interest Expense (Income) Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestExpenseExplanatory
399 Components of Finance Costs, Net, Include Other Finance Costs (Income) Concept (Text Block (HTML)) For Period tri:DisclosureOfFinanceIncomeCostsExplanatory
400 1045 - Disclosure - Equity Method Investments (Tables) Network

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401 Implied Table Table

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402 Text block [abstract] Abstract tri:TextBlockAbstract
403 Share of Post-tax (Losses) in Equity Method Investments Reported in Consolidated Income Statement Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationOfPostTaxEarningsLossesInEquityMethodInvestmentsExplanatory
404 Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutInvestmentsAccountedForUsingEquityMethodExplanatory
405 Summary of Financial Information for Refinitiv with Reconciliation to Thomson Reuters Carrying Value of its Investment Concept (Text Block (HTML)) For Period tri:DisclosureOfSummarizedFinancialInformationOfEquityMethodInvestmentsExplantory
406 1046 - Disclosure - Taxation (Tables) Network

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407 Implied Table Table

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408 Text block [abstract] Abstract tri:TextBlockAbstract
409 Components of Tax Expense (Benefit) Concept (Text Block (HTML)) For Period tri:DisclosureOfComponentsOfIncomeTaxExplanatory
410 Schedule of Taxes on Items Recognized in Other Comprehensive Loss or Directly in Equity Concept (Text Block (HTML)) For Period tri:DisclosureOfTaxRelatingToComponentsOfOtherComprehensiveIncomeOrLossExplanatory
411 Schedule of Reconciliation of Income Tax Expense Benefit Concept (Text Block (HTML)) For Period tri:DisclosureOfReconciliationOfIncomeTaxExpenseBenefitExplanatory
412 1047 - Disclosure - Discontinued Operations (Tables) Network

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413 Statement [table] Table

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414 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
415 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
416 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
417 Statement [LineItems] LineItems tri:StatementLineItems
418 Summary of Earnings from Discontinued Operations Concept (Text Block (HTML)) For Period tri:DisclosureOfProfitOrLossFromDiscontinuedOperationsExplanatory
419 Schedule of Consideration Received and Net Assets Disposed on Sale of Financial and Risk Business Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationOfConsiderationReceivedAndNetAssetsDisposedOnSaleOfPropertiesExplanatory
420 1048 - Disclosure - Earnings Per Share (Tables) Network

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421 Implied Table Table

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422 Text block [abstract] Abstract tri:TextBlockAbstract
423 Reconciliation of Earnings Used for Earnings per Share Calculations Concept (Text Block (HTML)) For Period tri:DisclosureOfEarningsPerShareFromContinuingOperationsExplanatory
424 Weighted Average Common Shares Concept (Text Block (HTML)) For Period tri:DisclosureOfWeightedAverageNumberOfCommonSharesOutstandingAndItsReconciliationExplanatory
425 1049 - Disclosure - Cash and Cash Equivalents (Tables) Network

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426 Implied Table Table

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427 Text block [abstract] Abstract tri:TextBlockAbstract
428 Summary of Cash and Cash Equivalents Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatory
429 1050 - Disclosure - Trade and Other Receivables (Tables) Network

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430 Implied Table Table

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431 Text block [abstract] Abstract tri:TextBlockAbstract
432 Summary of Trade and Other Receivables Concept (Text Block (HTML)) For Period tri:DisclosureDetailedInformationOfTradeAndOtherReceivablesExplanatory
433 Summary of Aging of Gross Trade Receivables Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationOfAgingOfTradeReceivablesExplanatory
434 Summary of Change in Allowance for Doubtful Accounts Concept (Text Block (HTML)) For Period tri:DisclosureOfAllowanceForDoubtfulAccountsExplanatory
435 1051 - Disclosure - Prepaid Expenses and Other Current Assets (Tables) Network

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436 Implied Table Table

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437 Text block [abstract] Abstract tri:TextBlockAbstract
438 Schedule of Prepaid Expenses and Other Current Assets Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationOfPrepaidExpensesAndOtherCurrentAssetsExplanatory
439 1052 - Disclosure - Computer Hardware and Other Property (Tables) Network

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440 Implied Table Table

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441 Text block [abstract] Abstract tri:TextBlockAbstract
442 Summary of Computer Hardware and Other Property Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
443 1053 - Disclosure - Intangible Assets (Tables) Network

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444 Statement [table] Table

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445 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
446 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
447 Computer software [member] Member ifrs-full:ComputerSoftwareMember
448 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
449 Statement [LineItems] LineItems tri:StatementLineItems
450 Schedule of Changes in Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
451 1054 - Disclosure - Goodwill (Tables) Network

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452 Implied Table Table

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453 Text block [abstract] Abstract tri:TextBlockAbstract
454 Summary of Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillExplanatory
455 Summary of Carrying Amount of Goodwill by Cash Generating Unit Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
456 Impairment Test of Goodwill- Key Assumptions Concept (Text Block (HTML)) For Period tri:DisclosureOfKeyAssumptionsUsedInPerformingGoodwillImpairmentExplanatory
457 1055 - Disclosure - Financial Instruments (Tables) Network

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458 Implied Table Table

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459 Text block [abstract] Abstract tri:TextBlockAbstract
460 Summary of Financial Assets and Liabilities Concept (Text Block (HTML)) For Period tri:DisclosureOfFinancialAssetsAndLiabilitiesExplanatory
461 Summary of Debt and Related Derivative Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDebtSecuritiesExplanatory
462 Summmary of Information Regarding Notes Repaid Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
463 Cross-currency Risk Exposures Interest Rate Swaps Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutHedgesExplanatory
464 Currency Risk Exposures Concept (Text Block (HTML)) For Period tri:DisclosureOfCurrencyRiskExposureExplanatory
465 Foreign Exchange Contracts- US Dollar Notional Amounts Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationNotionalAmountsOfContractsOutstandingExplanatory
466 Fair Value Gains and Losses from Derivative Financial Instruments Concept (Text Block (HTML)) For Period tri:DisclosureOfFairValueGainsAndLossesFromDerivativeFinancialInstrumentsExplanatory
467 Currency Risk- Sensitivity Analysis Concept (Text Block (HTML)) For Period tri:DisclosureOfCurrencyRiskSensitivityAnalysisExplanatory
468 Disclosure of Maturity Analysis for Non-derivative and Derivative Financial Liabilities Concept (Text Block (HTML)) For Period tri:DisclosureOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilitiesExplanatory
469 Summary of Credit Ratings Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExternalCreditExposuresExplanatory
470 Net Debt Concept (Text Block (HTML)) For Period tri:DisclosureOfNetDebtExplanatory
471 Reconciliation of Movements of Liabilities to Cash Flows Arising from Financing Activities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
472 Fair Value Hierarchy Concept (Text Block (HTML)) For Period tri:DisclosureOfFairValueHierarchyExplanatory
473 Disclosure of Offsetting of Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOffsettingOfFinancialAssetsExplanatory
474 Disclosure of Offsetting of Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesExplanatory
475 1056 - Disclosure - Other Non-Current Assets (Tables) Network

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476 Implied Table Table

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477 Text block [abstract] Abstract tri:TextBlockAbstract
478 Summary of Other Non-Current Assets Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutOtherNoncurrentAssetsExplanatory
479 1057 - Disclosure - Payables, Accruals and Provisions (Tables) Network

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480 Implied Table Table

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481 Text block [abstract] Abstract tri:TextBlockAbstract
482 Schedule of Payables, Accruals and Provisions Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutPayablesAccrualsAndProvisionsExplanatory
483 1058 - Disclosure - Provisions and Other Non-Current Liabilities (Tables) Network

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484 Implied Table Table

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485 Text block [abstract] Abstract tri:TextBlockAbstract
486 Summary of Provisions and Other Non-Current Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
487 Summary of Movement in Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherProvisionsExplanatory
488 1059 - Disclosure - Deferred Tax (Tables) Network

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489 Implied Table Table

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490 Text block [abstract] Abstract tri:TextBlockAbstract
491 Summary of Movements of Deferred Income Tax Liabilities and Assets Concept (Text Block (HTML)) For Period tri:DisclosureOfMovementsOfDeferredTaxAssetsAndLiabilitiesExplanatory
492 Summary of Adjustments in Deferred Tax Assets Concept (Text Block (HTML)) For Period tri:DisclosureOfDeferredTaxAssetsLiabilityAdjustmentsExplanatory
493 Summary of Estimated Recovery Period for Deferred Tax Balances Concept (Text Block (HTML)) For Period tri:DisclosureOfEstimatedRecoveryPeriodForTheDeferredTaxBalanceExplanatory
494 Summary of Tax Losses and Other Tax Attributes Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutDeferredTaxesExplanatory
495 1060 - Disclosure - Capital (Tables) Network

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496 Implied Table Table

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497 Text block [abstract] Abstract tri:TextBlockAbstract
498 Summary of Change in Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIssuedCapitalExplanatory
499 Summary of dividend declared and paid Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDividendsExplanatory
500 Details of NCIB Share Repurchases Concept (Text Block (HTML)) For Period tri:DisclosureOfShareRepurchasesExplanatory
501 1061 - Disclosure - Share-Based Compensation (Tables) Network

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502 Implied Table Table

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503 Text block [abstract] Abstract tri:TextBlockAbstract
504 Stock Incentive Plans Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementExplanatory
505 Fair Value Measurement of Stock Options Concept (Text Block (HTML)) For Period tri:DisclosureOfOptionPricingModelAssumptionsExplanatory
506 Number of Awards Outstanding Concept (Text Block (HTML)) For Period tri:DisclosureOfChangesInOutstandingStockbasedAwardsAndNumberOfAwardsExercisableExplanatory
507 Summary of Share Based Compensation Expense Concept (Text Block (HTML)) For Period tri:DisclosureOfShareBasedCompensationExpenseExplanatory
508 Summary of Additional Information Relating to Stock Option and SAR's Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory
509 1062 - Disclosure - Employee Benefit Plans (Tables) Network

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510 Implied Table Table

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511 Text block [abstract] Abstract tri:TextBlockAbstract
512 Net Defined Benefit Plan Obligations Concept (Text Block (HTML)) For Period tri:ScheduleOfChangesInDefinedBenefitObligationExplanatory
513 Summary of Net Surpluses (Obligations) of Material Defined Benefit Plans Concept (Text Block (HTML)) For Period tri:DisclosureOfNetSurplusDeficitInPlanExplanatory
514 Disclosure of Present Value of Defined Benefit Obligations Concept (Text Block (HTML)) For Period tri:DisclosureOfChangesInThePresentValueOfDefinedBenefitObligationExplanatory
515 Defined Benefit Obligation - Other Disclosures Concept (Text Block (HTML)) For Period tri:DisclosureOfDefinedBenefitObligationsExplanatory
516 Summary of Weighted-Average Duration of Plan Obligations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutMaturityProfileOfDefinedBenefitObligationExplanatory
517 Fair Value of Plan Assets Concept (Text Block (HTML)) For Period tri:DisclosureOfChangesInFairValueOfPlanAssetsExplanatory
518 Summary of Major Categories of Plan Assets for Funded Plans Concept (Text Block (HTML)) For Period tri:DisclosureOfMajorCategoriesOfDefinedBenefitPlanAssetsExplanatory
519 Summary of Weighted-Average Actuarial Assumptions Concept (Text Block (HTML)) For Period tri:SummaryOfWeightedAverageActuarialAssumptionsExplanatory
520 Summary of Life Expectation in Years of an Average Plan Participant Concept (Text Block (HTML)) For Period tri:DisclosureOfLifeExpectationOfAnAveragePlanParticipantExplanatory
521 Defined Benefit Plan Expense Concept (Text Block (HTML)) For Period tri:DisclosureOfDefinedBenefitPensionPlanExpenseExplantaory
522 Summary of Amounts Recognized in Other Comprehensive Loss (Income) for Material Defined Benefit Plans Concept (Text Block (HTML)) For Period tri:DisclosureOfDefinedBenefitPlansExpenseRecognizedInIncomeStatementExplanatory
523 1063 - Disclosure - Supplemental Cash Flow Information (Tables) Network

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524 Implied Table Table

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525 Text block [abstract] Abstract tri:TextBlockAbstract
526 Details of Other in the Consolidated Statement of Cash Flow Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutOtherInConsolidatedStatementOfCashFlowExplanatory
527 Details of Changes in Working Capital and Other Items Concept (Text Block (HTML)) For Period tri:DisclosureOfChangesInWorkingCapitalAndOtherItemsExplanatory
528 Details of Income Taxes Paid Concept (Text Block (HTML)) For Period tri:DisclosureOfDetailedInformationAboutIncomeTaxPaidRefundTextBlock
529 Details of Operating Cash Flows from Discontinued Operations Concept (Text Block (HTML)) For Period tri:DisclosureOfCashFlowInformationOfDiscontinuedOperationsExplanatory
530 1064 - Disclosure - Acquisitions (Tables) Network

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531 Implied Table Table

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532 Text block [abstract] Abstract tri:TextBlockAbstract
533 Summary of Acquisition Activity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
534 Summary of Net Assets Acquired Concept (Text Block (HTML)) For Period tri:DisclosureOfBusinessAcquisitionsByAcquisitionAssetsAcquiredAndLiabilitiesAssumedExplanatory
535 1065 - Disclosure - Contingencies, Commitments and Guarantees (Tables) Network

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536 Implied Table Table

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537 Text block [abstract] Abstract tri:TextBlockAbstract
538 Summary of Future Aggregate Minimum Lease Payments under Non-Cancellable Operating Leases Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
539 Summary of Future Unconditional Purchase Obligations Concept (Text Block (HTML)) For Period tri:DisclosureOfFutureUnconditionalPurchaseObligationsExplanatory
540 1066 - Disclosure - Related Party Transactions (Tables) Network

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541 Implied Table Table

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542 Text block [abstract] Abstract tri:TextBlockAbstract
543 Summary of Expense or Contra-Expense Concept (Text Block (HTML)) For Period tri:DisclosureOfExpenseOrContraexpenseExplanatory
544 Summary of Key Management Personnel Compensation, Including Directors Concept (Text Block (HTML)) For Period tri:DisclosureOfKeyManagementPersonnelCompensationIncludingDirectorsOfEntityOrParentExpalantory
545 1067 - Disclosure - Summary of Business and Significant Accounting Policies - Additional Information (Detail) Network

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546 Disclosure of changes in accounting estimates [table] Table

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547 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
548 Currently stated [member] Member ifrs-full:RestatedMember
549 Adjustments Due to Adoption of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
550 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
551 Equity [member] Member ifrs-full:EquityMember
552 Retained earnings [member] Member ifrs-full:RetainedEarningsMember
553 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
554 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
555 Financial & risk [member] Member tri:FinancialAndRiskMember
556 Refinitiv [member] Member tri:RefinitivMember
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558 Ranges [member] Member ifrs-full:RangesMember
559 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
560 Top of range [member] Member ifrs-full:TopOfRangeMember
561 Disclosure of business description and basis of presentation [line items] LineItems tri:DisclosureOfBusinessDescriptionAndBasisOfPresentationLineItems
562 Percentage of ownership sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
563 Percentage of ownership held Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
564 Adjustment to opening balance of retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
565 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
566 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
567 Recurring revenues subscription term Concept (xbrli:durationItemType) For Period tri:RecurringRevenuesSubscriptionTerm
568 1068 - Disclosure - Summary of Business and Significant Accounting Policies - Schedule of Computer Hardware and Other Property - Estimated Useful Lives (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureSummaryOfBusinessAndSignificantAccountingPoliciesScheduleOfComputerHardwareAndOtherPropertyEstimatedUsefulLives
569 Disclosure of detailed information about property, plant and equipment [table] Table

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570 Range [axis] Axis ifrs-full:RangeAxis
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572 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
573 Top of range [member] Member ifrs-full:TopOfRangeMember
574 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
575 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
576 Computer hardware [member] Member ifrs-full:ComputerEquipmentMember
577 Buildings and building improvements [member] Member ifrs-full:BuildingsMember
578 Furniture, fixtures and equipment [member] Member ifrs-full:FixturesAndFittingsMember
579 Disclosure of detailed information about property, plant and equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
580 Property useful lives Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
581 1069 - Disclosure - Summary of Business and Significant Accounting Policies - Schedule of Other Identifiable Assets - Estimated Useful Lives (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureSummaryOfBusinessAndSignificantAccountingPoliciesScheduleOfOtherIdentifiableAssetsEstimatedUsefulLives
582 Disclosure of detailed information about property, plant and equipment [table] Table

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585 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
586 Top of range [member] Member ifrs-full:TopOfRangeMember
587 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
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589 Trade names [member] Member ifrs-full:BrandNamesMember
590 Customer relationships [member] Member ifrs-full:CustomerrelatedIntangibleAssetsMember
591 Databases and content [member] Member ifrs-full:TechnologybasedIntangibleAssetsMember
592 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
593 Disclosure of detailed information about property, plant and equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
594 Intangible assets useful lives Concept (Text/String) For Period ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
595 1070 - Disclosure - Critical Accounting Estimates and Judgments - Additional Information (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureCriticalAccountingEstimatesAndJudgmentsAdditionalInformation
596 Disclosure of changes in accounting estimates [table] Table

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597 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
598 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
599 Technology Related Development [member] Member ifrs-full:CapitalisedDevelopmentExpenditureMember
600 Major purchases of assets [member] Member ifrs-full:MajorPurchasesOfAssetsMember
601 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
602 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
603 Refinitiv [member] Member tri:RefinitivMember
604 Disclosure of changes in accounting estimates [Line Items] LineItems ifrs-full:DisclosureOfChangesInAccountingEstimatesLineItems
605 Combined allowances Concept (Monetary) As Of Credit tri:AllowanceAndSalesAdjustments
606 Trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
607 Combined allowances, percentage of trade receivables Concept (Percent) As Of tri:PercentageOfAllowanceAccountForCreditLossesOfFinancialAssets
608 Increase in reserves as a percentage of trade receivables Concept (Percent) For Period tri:IncreaseInReserveForAccountsReceivablePercentage
609 Decrease in pre-tax earnings Concept (Monetary) For Period Debit tri:DecreaseProfitLossBeforeTax
610 Computer software Concept (Monetary) As Of Debit ifrs-full:ComputerSoftware
611 Other identifiable intangible assets Concept (Monetary) As Of Debit ifrs-full:OtherIntangibleAssets
612 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
613 Equity method investments Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
614 Percentage of ownership held Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
615 1071 - Disclosure - Recent Accounting Pronouncements - Additional Information (Detail) Network

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616 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

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617 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
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619 IFRS 16 [member] Member tri:IFRS16Member
620 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
621 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
622 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
623 Decrease of lease expense Concept (Monetary) For Period Debit ifrs-full:RentalExpense
624 Increase in depreciation and interest expense Concept (Monetary) For Period Debit tri:ExpectedIncreaseOfDepreciationAndInterestExpense
625 1072 - Disclosure - Revenues - Summary of Revenues by Type (Detail) Network

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626 Disclosure of disaggregation of revenue from contracts with customers [table] Table

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627 Segments [axis] Axis ifrs-full:SegmentsAxis
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629 Legal Professionals [member] Member tri:LegalProfessionalsMember
630 Corporates [member] Member tri:CorporatesMember
631 Tax Professionals [member] Member tri:TaxProfessionalsMember
632 Reuters News [member] Member tri:ReutersNewsMember
633 Global Print [member] Member tri:GlobalPrintMember
634 Timing of transfer of goods or services [axis] Axis ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
635 Timing of transfer of goods or services [member] Member ifrs-full:TimingOfTransferOfGoodsOrServicesMember
636 Recurring [member] Member tri:RecurringMember
637 Transactions [member] Member tri:TransactionsMember
638 Global Print [member] Member tri:GlobalPrintMember
639 Eliminations [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
640 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
641 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
642 Operating segments [member] Member ifrs-full:OperatingSegmentsMember
643 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
644 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
645 1073 - Disclosure - Revenues - Summary of geographical information (Detail) Network

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646 Disclosure of geographical areas [table] Table

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647 Segments [axis] Axis ifrs-full:SegmentsAxis
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650 Corporates [member] Member tri:CorporatesMember
651 Tax Professionals [member] Member tri:TaxProfessionalsMember
652 Reuters News [member] Member tri:ReutersNewsMember
653 Global Print [member] Member tri:GlobalPrintMember
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657 Canada [member] Member country:CA
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661 Other Countries [member] Member tri:OtherCountriesMember
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663 Asia Pacific [member] Member srt:AsiaPacificMember
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665 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
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667 Operating segments [member] Member ifrs-full:OperatingSegmentsMember
668 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
669 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
670 1074 - Disclosure - Revenues - Additional Information (Detail) Network

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671 Disclosure of transaction price allocated to remaining performance obligations [table] Table

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672 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
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674 Refinitiv [member] Member tri:RefinitivMember
675 Maturity [axis] Axis ifrs-full:MaturityAxis
676 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
677 Later than three year to 2048 [member] Member tri:LaterThanThreeYearTo2048Member
678 Disclosure of transaction price allocated to remaining performance obligations [line items] LineItems ifrs-full:DisclosureOfTransactionPriceAllocatedToRemainingPerformanceObligationsLineItems
679 Deferred revenue, beginning of period Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
680 Transfer to assets held for sale Concept (Monetary) For Period Debit ifrs-full:DecreaseThroughTransferToLiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSaleOtherProvisions
681 Revenue recognized in deferred revenue Concept (Monetary) For Period Debit ifrs-full:DecreaseThroughPerformanceObligationBeingSatisfiedContractLiabilities
682 Non-current deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
683 Amortization of deferred commissions Concept (Monetary) For Period Debit ifrs-full:AmortisationAssetsRecognisedFromCostsIncurredToObtainOrFulfilContractsWithCustomers
684 Aggregate amount of transaction price allocated to remaining performance obligations Concept (Monetary) As Of Credit ifrs-full:TransactionPriceAllocatedToRemainingPerformanceObligations
685 Percentage of ownership held Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
686 Aggregate amount of transaction price allocated to remaining performance obligations, per year Concept (Monetary) For Period Credit ifrs-full:RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods
687 1075 - Disclosure - Revenues - Summary of Remaining Performance Obligations (Detail) Network

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688 Disclosure of transaction price allocated to remaining performance obligations [table] Table

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689 Maturity [axis] Axis ifrs-full:MaturityAxis
690 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
691 Not later than one year [member] Member ifrs-full:NotLaterThanOneYearMember
692 Between one and two years [member] Member tri:BetweenOneAndTwoYearsMember
693 Between two and three years [member] Member tri:BetweenTwoAndThreeYearsMember
694 Later than three year [member] Member tri:LaterThanThreeYearMember
695 Disclosure of transaction price allocated to remaining performance obligations [line items] LineItems ifrs-full:DisclosureOfTransactionPriceAllocatedToRemainingPerformanceObligationsLineItems
696 2019 Concept (Percent) For Period tri:RevenueOfRemainingPerformanceObligations
697 1076 - Disclosure - Segment Information - Summary of Operating Results of Reportable Segments (Detail) Network

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698 Disclosure of operating segments [table] Table

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699 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
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701 Computer software [member] Member ifrs-full:ComputerSoftwareMember
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707 Segments [axis] Axis ifrs-full:SegmentsAxis
708 Segments [member] Member ifrs-full:SegmentsMember
709 Legal Professionals [member] Member tri:LegalProfessionalsMember
710 Corporates [member] Member tri:CorporatesMember
711 Tax Professionals [member] Member tri:TaxProfessionalsMember
712 Reuters News [member] Member tri:ReutersNewsMember
713 Global Print [member] Member tri:GlobalPrintMember
714 Eliminations [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
715 Disclosure of operating segments [Line Items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
716 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
717 Adjusted EBITDA Concept (Monetary) For Period Credit tri:AdjustedEBITDA
718 Fair value adjustments (see note 6) Concept (Monetary) For Period Debit tri:FairValueAdjustments
719 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
720 Amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
721 Other operating gains, net Concept (Monetary) For Period Credit ifrs-full:OtherGainsLosses
722 Operating profit Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
723 Net interest expense Concept (Monetary) For Period Credit ifrs-full:InterestRevenueExpense
724 Other finance income (costs) Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
725 Share of post-tax losses in equity method investments Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
726 Tax (expense) benefit Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
727 Earnings from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
728 1077 - Disclosure - Segment Information - Schedule of Other Required Segment Data (Detail) Network

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729 Disclosure of operating segments [table] Table

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730 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
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732 Reportable segments [member] Member ifrs-full:ReportableSegmentsMember
733 Corporate assets [member] Member tri:CorporateAssetsMember
734 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
735 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
736 Legal Professionals [member] Member tri:LegalProfessionalsMember
737 Corporates [member] Member tri:CorporatesMember
738 Tax Professionals [member] Member tri:TaxProfessionalsMember
739 Reuters News [member] Member tri:ReutersNewsMember
740 Global Print [member] Member tri:GlobalPrintMember
741 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
742 Disclosure of operating segments [Line Items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
743 Additions to capital assets and goodwill Concept (Monetary) For Period Debit ifrs-full:AdditionsToNoncurrentAssets
744 1078 - Disclosure - Segment Information - Summary of Operating Results by Geographical areas (Detail) Network

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745 Disclosure of geographical areas [table] Table

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749 Canada [member] Member country:CA
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751 Americas [member] Member srt:AmericasMember
752 U.K. [Member] Member country:GB
753 Other Countries [member] Member tri:OtherCountriesMember
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755 Asia Pacific [member] Member srt:AsiaPacificMember
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757 Non-Current Assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
758 1079 - Disclosure - Segment Information - Summary of Revenues by Classes of Similar Products or Services (Detail) Network

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759 Disclosure of products and services [table] Table

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761 Recurring [member] Member ifrs-full:ProductsAndServicesMember
762 Electronic, software and services [member] Member tri:ElectronicSoftwareAndServicesMember
763 Global Print [member] Member tri:GlobalPrintMember
764 Disclosure of products and services [Line Items] LineItems ifrs-full:DisclosureOfProductsAndServicesLineItems
765 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
766 1080 - Disclosure - Operating Expenses - Components of Operating Expenses (Detail) Network

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767 Implied Table Table

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768 Operating Expenses 1 [abstract] Abstract tri:OperatingExpenses1Abstract
769 Salaries, commissions and allowances Concept (Monetary) For Period Debit tri:SalariesCommissionAndAllowances
770 Share-based payments Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
771 Post-employment benefits Concept (Monetary) For Period Debit tri:PostEmploymentBenefitExpense
772 Total staff costs Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
773 Goods and services Concept (Monetary) For Period Debit tri:GoodsAndServicesExpenses
774 Data Concept (Monetary) For Period Debit tri:DataExpenses
775 Telecommunications Concept (Monetary) For Period Debit ifrs-full:CommunicationExpense
776 Real estate Concept (Monetary) For Period Debit tri:RealEstateExpense
777 Fair value adjustments Concept (Monetary) For Period Debit tri:FairValueAdjustments
778 Total operating expenses Concept (Monetary) For Period Debit tri:OperatingExpenseExcludingDepreciationAmortizationAndOther
779 1081 - Disclosure - Operating Expenses - Components of Operating Expenses (Parenthetical) (Detail) Network

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780 Implied Table Table

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781 Operating Expenses 1 [abstract] Abstract tri:OperatingExpenses1Abstract
782 Severance costs Concept (Monetary) For Period Debit tri:SalariesCommissionsAndAllowancesIncludeSeveranceCosts
783 Restructuring charges Concept (Monetary) For Period Debit ifrs-full:ExpenseOfRestructuringActivities
784 1082 - Disclosure - Other Operating Gains Net - Additional Information (Detail) Network

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785 Disclosure Of Other Operating Gains Net [table] Table

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786 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
787 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
788 Refinitiv [member] Member tri:RefinitivMember
789 Disclosure of Other Operating Gains [Line Items] LineItems tri:DisclosureOfOtherOperatingGainsLineItems
790 Other operating (losses) gains, net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
791 1083 - Disclosure - Finance Costs, Net - Components of Finance Costs, Net, Include Interest Expense (Income) (Detail) Network

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792 Implied Table Table

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794 Interest expense: Abstract ifrs-full:InterestCostsAbstract
795 Debt Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBorrowings
796 Derivative financial instruments - hedging activities Concept (Monetary) For Period Debit tri:InterestExpenseOnDerivativeFinancialInstruments
797 Other, net Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnOtherFinancialLiabilities
798 Fair value (gains) losses on financial instruments: Abstract ifrs-full:GainsLossesOnFinancialInstrumentsAbstract
799 Cash flow hedges, transfer from equity (see note 20) Concept (Monetary) For Period Debit tri:ReclassificationAdjustmentsOnCashFlowHedgesNetOfTaxForeignExchange
800 Net foreign exchange (gains) losses on debt Concept (Monetary) For Period Debit tri:GainsLossesRecognizedInProfitLossAriseFromForeignCurrencyTranslationRelatedToDebt
801 Net interest expense - debt and other Concept (Monetary) For Period Debit tri:NetInterestExpenseFromDebtAndOther
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806 Implied Table Table

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809 Net (gains) losses on derivative instruments Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
810 Losses from redemption of debt securities Concept (Monetary) For Period Debit tri:LossesFromRedemptionOfDebtSecurities
811 Other Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
812 Other finance (income) costs Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
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814 Disclosure of associates [table] Table

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818 Refinitiv [member] Member tri:RefinitivMember
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828 Disclosure of associates [table] Table

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832 Other equity method investments [member] Member tri:OtherEquityMethodInvestmentsMember
833 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
834 Total share of post-tax losses in equity method investments Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
835 1087 - Disclosure - Equity Method Investments - Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position (Detail) Network

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836 Disclosure Of Share Of Equity Investment [table] Table

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842 Total equity method investments Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
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844 Disclosure Of Share Of Equity Investment [table] Table

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852 Thomson Reuters % share Concept (Percent) For Period tri:PercentageOfShareRecognisedInProfitOrLoss
853 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
854 Thomson Reuters carrying amount Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
855 Net assets attributable to Refinitiv, Beginning balance Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
856 Net earnings Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
857 Other comprehensive loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
858 Total comprehensive loss Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
859 Net assets attributable to Refinitiv, Ending balance Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
860 Assets Abstract ifrs-full:AssetsAbstract
861 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
862 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
863 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
864 Liabilities Abstract ifrs-full:LiabilitiesAbstract
865 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
866 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
867 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
868 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
869 Preference shares and other excluded additional paid in capital Concept (Monetary) For Period Credit tri:PreferredSharesAndOtherExcludedAdditionalPaidInCapital
870 1089 - Disclosure - Equity Method Investments - Summary of Financial Information for Refinitiv with Reconciliation to Thomson Reuters Carrying Value of its Investment (Parenthetical) (Detail) Network

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871 Disclosure Of Share Of Equity Investment [table] Table

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874 Refinitiv [member] Member tri:RefinitivMember
875 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
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877 1090 - Disclosure - Taxation - Components of Tax Expense (Benefit) (Detail) Network

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878 Implied Table Table

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882 Total tax expense (benefit) Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
883 1091 - Disclosure - Taxation - Schedule of Taxes on items Recognized in other Comprehensive loss or Directly in Equity (Detail) Network

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884 Disclosure Of Income Taxes [table] Table

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887 Employee benefits [member] Member tri:EmployeeBenefitsMember
888 Deferred and share-based compensation [member] Member tri:DeferredAndShareBasedCompensationMember
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890 Deferred tax expense (benefit) charged or credited directly to equity Concept (Monetary) For Period ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
891 Deferred tax benefit on share of other comprehensive loss in equity method investments - may be subsequently reclassified to net earnings Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss
892 Deferred tax benefit on share of other comprehensive loss in equity method investments - will not be reclassified to net earnings Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLoss
893 Current tax benefit on share-based payments Concept (Monetary) For Period Debit ifrs-full:CurrentTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
894 1092 - Disclosure - Taxation - Additional Information (Detail) Network

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895 Disclosure Of Income Taxes [table] Table

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900 Accounts payable and accrued liabilities [member] Member tri:AccountsPayableAndAccruedLiabilitiesMember
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906 Effective income tax expense (benefit) rate Concept (Percent) For Period ifrs-full:AverageEffectiveTaxRate
907 Effective income tax net charge associated with separation of financial and risk Concept (Monetary) For Period Debit tri:EffectiveIncomeTaxNetChargeAssociatedWithSeparationOfFinancialAndRisk
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911 Sensitivity to change in effective tax rate Concept (Monetary) For Period Debit tri:DecreaseOfProfitLossFromContinuingOperations
912 Current tax assets Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssets
913 Non-current tax assets Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsNoncurrent
914 Current taxes payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilities
915 1093 - Disclosure - Taxation - Schedule of Reconciliation of Income Tax Expense Benefit (Detail) Network

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916 Implied Table Table

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919 Income before tax multiplied by the standard rate of Canadian corporate tax of 26.5% Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
920 Income taxes recorded at rates different from the Canadian tax rate Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
921 Tax losses for which no benefit is recognized Concept (Monetary) For Period Debit tri:TaxLossesForWhichNoBenefitIsRecognized
922 Net non-deductible (non-taxable) foreign exchange and other losses (gains) Concept (Monetary) For Period Debit tri:TaxEffectOfNetNondeductibleNontaxableForeignExchangeAndOtherLossesGains
923 Tax on restructuring activities associated with the Financial & Risk transaction Concept (Monetary) For Period Debit tri:TaxOnRestructuringActivitiesAssociatedWithTheFinancialAndRiskTransaction
924 Provision for uncertain tax provisions Concept (Monetary) For Period Debit tri:ProvisionForUncertainTaxPositions
925 Recognition of tax losses that arose in prior years Concept (Monetary) For Period Credit tri:RecognitionOfPriorTaxLosses
926 Impact of tax law changes Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
927 Other adjustments related to prior years Concept (Monetary) For Period Debit tri:OtherAdjustmentsRelatedToPriorYears
928 Withholding taxes Concept (Monetary) For Period Debit tri:TaxEffectOfWithholdingTaxes
929 Other differences Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
930 Total tax expense (benefit) Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
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932 Disclosure Of Income Taxes [table] Table

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936 Disclosure of income taxes [line items] LineItems tri:DisclosureOfIncomeTaxesLineItems
937 Applicable tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
938 Deferred tax benefit Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
939 1095 - Disclosure - Discontinued Operations - Additional Information (Detail) Network

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940 Income Loss From Discontinued Operations [table] Table

*

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945 Percentage of ownership stake sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
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947 Income Loss From Discontinued Operations [table] Table

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952 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
953 Expenses Concept (Monetary) For Period Debit tri:ExpensesDiscontinuedOperations1
954 Earnings from discontinued operations before income tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
955 Tax (expense) benefit on earnings from discontinued operations Concept (Monetary) For Period Debit ifrs-full:TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
956 Earnings from discontinued operations after income tax Concept (Monetary) For Period Credit tri:ProfitLossAfterTaxDiscontinuedOperations
957 Gain on sale of discontinued operations before income tax Concept (Monetary) For Period Credit ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
958 Tax benefit on gain on sale of discontinued operations Concept (Monetary) For Period Debit ifrs-full:TaxExpenseRelatingToGainLossOnDiscontinuance
959 Earnings from discontinued operations, net of tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
960 1097 - Disclosure - Discontinued Operations - Summary of Earnings from Discontinued Operations (Parenthetical) (Detail) Network

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961 Income Loss From Discontinued Operations [table] Table

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963 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
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967 Deferred tax liability Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
968 Tax (expense) benefit on earnings from discontinued operations Concept (Monetary) For Period Debit ifrs-full:TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
969 1098 - Disclosure - Discontinued Operations - Summary of Assets and Liabilities Classified as Held for Sale (Detail) Network

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970 Income Loss From Discontinued Operations [table] Table

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975 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
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978 Consideration received - cash and cash equivalents Concept (Monetary) For Period Credit ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents
979 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
980 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
981 Other financial assets - current Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
982 Prepaid expenses and other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
983 Computer hardware and other property, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
984 Computer software, net Concept (Monetary) As Of Debit ifrs-full:ComputerSoftware
985 Other identifiable intangible assets, net Concept (Monetary) As Of Debit ifrs-full:OtherIntangibleAssets
986 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
987 Other financial assets - non-current Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
988 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
989 Deferred tax Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
990 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
991 Payables, accruals and provisions Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
992 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
993 Other financial liabilities - current Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
994 Provisions and other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
995 Other financial liabilities - non-current Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
996 Deferred tax Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
997 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
998 Net assets disposed Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
999 Non-controlling interests disposed Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1000 Cumulative foreign currency translation adjustments Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationNetOfTax
1001 Opening balance 45% equity investment in Refinitiv Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1002 Other Concept (Monetary) For Period Credit tri:DiscontinuedOperationsOtherNonoperatingIncomeExpensesNet
1003 Gain on sale before income tax Concept (Monetary) For Period Credit ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
1004 1099 - Disclosure - Discontinued Operations - Summary of Assets and Liabilities Classified as Held for Sale (Parenthetical) (Detail) Network

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1005 Income Loss From Discontinued Operations [table] Table

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1007 Assets and liabilities not classified as held for sale [member] Member ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
1008 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
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1010 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1011 Refinitiv [member] Member tri:RefinitivMember
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1015 1100 - Disclosure - Earnings Per Share - Reconciliation of Earnings Used for Earnings per Share Calculations (Detail) Network

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1016 Implied Table Table

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1018 Earnings attributable to common shareholders Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
1019 Less: Dividends declared on preference shares Concept (Monetary) For Period Debit tri:PreferenceSharesDividendsIncomeStatementImpact
1020 Earnings used in consolidated earnings per share Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
1021 Less: Earnings from discontinued operations, net of tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
1022 Remove: Non-controlling interests from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperationsAttributableToNoncontrollingInterests
1023 Earnings used in earnings per share from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperationsAttributableToOrdinaryEquityHoldersOfParentEntity
1024 1101 - Disclosure - Earnings Per Share - Weighted Average Common Shares (Detail) Network

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1025 Implied Table Table

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1032 1102 - Disclosure - Earnings Per Share - Additional Information (Detail) Network

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1033 Implied Table Table

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1034 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
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1036 1103 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) Network

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1037 Implied Table Table

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1038 Cash and cash equivalents [abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
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1041 Short-term deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
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1043 1104 - Disclosure - Cash and Cash Equivalents - Additional information (Detail) Network

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1044 Implied Table Table

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1047 1105 - Disclosure - Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) Network

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1048 Implied Table Table

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1054 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherReceivables
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1056 1106 - Disclosure - Trade and Other Receivables - Summary of Trade and Other Receivables (Parenthetical) (Detail) Network

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1066 Aging Of Trade Receivables [table] Table

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1073 Later than three months [member] Member ifrs-full:LaterThanThreeMonthsMember
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1076 1108 - Disclosure - Trade and Other Receivables - Schedule of Change in Allowance for Doubtful Accounts (Detail) Network

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1077 Implied Table Table

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1080 Charges Concept (Monetary) For Period ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
1081 Write-offs Concept (Monetary) For Period Debit ifrs-full:UtilisationAllowanceAccountForCreditLossesOfFinancialAssets
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1083 Translation and other, net Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets
1084 Balance at end of year Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1085 1109 - Disclosure - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) Network

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1091 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
1092 Prepaid expenses and other current assets Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaymentsAndOtherCurrentAssets
1093 1110 - Disclosure - Computer Hardware and Other Property - Summary of Computer Hardware and Other Property (Detail) Network

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1111 Capital expenditures Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1112 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1113 Removed from service Concept (Monetary) For Period Credit ifrs-full:RetirementsPropertyPlantAndEquipment
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1116 Ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1117 1111 - Disclosure - Computer Software - Schedule of Changes in Computer Software (Detail) Network

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1118 Disclosure of detailed information about intangible assets [table] Table

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1135 Balance at beginning of year Concept (Monetary) As Of Debit ifrs-full:ComputerSoftware
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1137 Current year amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1138 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
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1140 Disposals of businesses Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1141 Translation and other, net Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
1142 Balance at end of year Concept (Monetary) As Of Debit ifrs-full:ComputerSoftware
1143 1112 - Disclosure - Other Identifiable Intangible Assets - Summary of Other Identifiable Intangible Assets (Detail) Network

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1144 Disclosure of detailed information about intangible assets [table] Table

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1149 Databases and content [member] Member ifrs-full:TechnologybasedIntangibleAssetsMember
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1163 Balance at beginning of year Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1164 Current year amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1165 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1166 Removed from service Concept (Monetary) For Period Credit ifrs-full:RetirementsIntangibleAssetsOtherThanGoodwill
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1168 Translation and other, net Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
1169 Balance at end of year Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1170 1113 - Disclosure - Other Identifiable Intangible Assets - Summary of Other Identifiable Intangible Assets (Parenthetical) (Detail) Network

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1171 Disclosure of detailed information about intangible assets [table] Table

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1176 Intangible assets carrying amount Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1177 Percentage of ownership sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
1178 1114 - Disclosure - Other Identifiable Intangible Assets - Additional Information (Detail) Network

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1179 Disclosure of detailed information about intangible assets [table] Table

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1185 Trade Name Concept (Monetary) As Of Debit ifrs-full:BrandNames
1186 Goodwill impairment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1187 1115 - Disclosure - Goodwill - Summary of Goodwill (Detail) Network

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1188 Disclosure of reconciliation of changes in goodwill [table] Table

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1193 Disclosure of reconciliation of changes in goodwill [Line Items] LineItems ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems
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1196 Disposals of businesses Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1197 Translation and other, net Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesGoodwill
1198 Translation Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesGoodwill
1199 Balance at end of year Concept (Monetary) As Of Debit ifrs-full:Goodwill
1200 1116 - Disclosure - Goodwill - Additional Information (Detail) Network

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1201 Disclosure of information for cash-generating units [table] Table

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1206 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
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1208 Legal and Tax & Accounting [member] Member tri:LegalAndTaxAndAccountingMember
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1217 1117 - Disclosure - Goodwill - Summary of Carrying Amount of Goodwill by Cash Generating Unit (Detail) Network

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1218 Disclosure of information for cash-generating units [table] Table

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1225 1118 - Disclosure - Goodwill - Impairment Test of Goodwill- Key Assumptions (Detail) Network

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1226 Disclosure of information for cash-generating units [table] Table

*

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1227 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
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1231 Disclosure of information for cash-generating units [Line Items] LineItems ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
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1235 1119 - Disclosure - Financial Instruments - Summary of Financial Assets and Liabilities (Detail) Network

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1236 Disclosure Of Financial Assets And Liabilities [table] Table

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1240 Assets/ (liabilities) at fair value through earnings [member] Member tri:AssetsLiabilitiesAtFairValueThroughEarningsMember
1241 Derivatives used for hedging [member] Member ifrs-full:DerivativesMember
1242 Available for sale [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1243 Assets liabilities at amortized cost [member] Member tri:AssetsLiabilitiesAtAmortizedCostMember
1244 Assets at Fair Value through Other Comprehensive Income [member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
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1262 1120 - Disclosure - Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) Network

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1263 Disclosure Of Summary Of Debt And Related Derivative Instruments [table] Table

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1279 Commercial paper [member] Member tri:CommercialPaper1Member
1280 3.369% Notes, Due 2019 [member] Member tri:ThreePointThreeSixNineNotesDueTwoThousandNineteenMember
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1282 4.70% Notes, Due 2019 [member] Member tri:FourPointSevenZeroNotesDueTwoThousandNineteenMember
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1293 1121 - Disclosure - Financial Instruments - Summary of Debt and Related Derivative Instruments (Parenthetical) (Detail) Network

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1294 Disclosure Of Summary Of Debt And Related Derivative Instruments [table] Table

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1301 3.35% notes, due 2026 [member] Member tri:ThreePointThreeFiveNotesDueTwoThousandTwentySixMember
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1312 Debt instrument, maturity year Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
1313 Debt instrument, original currency Concept (Text/String) For Period ifrs-full:BorrowingsOriginalCurrency
1314 1122 - Disclosure - Financial Instruments - Additional Information (Detail) Network

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1315 Disclosure of detailed information about financial instruments [table] Table

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*

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1330 Equity Price Risk [Member] Member ifrs-full:EquityPriceRiskMember
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1338 Canadian Dollar [member] Member tri:CanadianDollarMember
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1341 Top of range [member] Member ifrs-full:TopOfRangeMember
1342 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
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1344 Foreign exchange contracts [member] Member tri:ForeignExchangeContractsMember
1345 Embedded derivatives [member] Member tri:EmbeddedDerivativesMember
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1350 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
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1352 Refinitiv [member] Member tri:RefinitivMember
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1383 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
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1387 Amount returned to shareholders Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
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1389 Reinvestment fund Concept (Monetary) For Period Credit tri:ReinvestmentFund
1390 Transaction costs Concept (Monetary) For Period Debit tri:TransactionCosts
1391 Cost of reposition of Company for growth and scale Concept (Monetary) For Period Debit tri:RepositionCost
1392 Equity at fair value Concept (Monetary) As Of Credit tri:FairValueOfEquity
1393 1123 - Disclosure - Financial Instruments - Summary of Information Regarding Notes Repaid (Detail) Network

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1394 Disclosure of detailed information about borrowings [table] Table

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1395 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
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1397 Redemption of notes [member] Member tri:RedemptionOfNotesMember
1398 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1399 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1400 3.369% Notes, Due 2019 [member] Member tri:ThreePointThreeSixNineNotesDueTwoThousandNineteenMember
1401 4.35% Notes, Due 2020 [member] Member tri:FourPointThreeFiveNotesDueTwoThousandTwentyMember
1402 4.70% Notes, Due 2019 [member] Member tri:FourPointSevenZeroNotesDueTwoThousandNineteenMember
1403 3.95% Notes, Due 2021 [member] Member tri:ThreePointNineFiveNotesDueTwoThousandTwentyOneMember
1404 3.85% Notes, Due 2024 [member] Member tri:ThreePointEightFiveNotesDueTwoThousandTwentyFourMember
1405 4.50% Notes, Due 2043 [member] Member tri:FourPointFiveZeroNotesDueTwoThousandFortyThreeMember
1406 6.50% Notes, Due 2018 [member] Member tri:SixPointFiveZeroNotesDueTwoThousandEighteenMember
1407 1.65% Notes, Due 2017 [member] Member tri:OnePointSixFiveNotesDueTwoThousandSeventeenMember
1408 1.30% Notes, Due 2017 [member] Member tri:OnePointThreeZeroNotesDueTwoThousandSeventeenMember
1409 Borrowing redemption [axis] Axis tri:BorrowingRedemptionAxis
1410 Borrowing redemption [domain] Member tri:BorrowingRedemptionDomain
1411 Partial Redemption [member] Member tri:PartialRedemptionMember
1412 Full Redemption [member] Member tri:FullRedemptionMember
1413 Disclosure of detailed information about borrowings [Line Items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1414 Notes, repaid date Concept (Text/String) For Period tri:BorrowingsRepaidDate
1415 Debt instrument, maturity year Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
1416 Debt instrument, interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1417 Debt instrument, principal amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1418 1124 - Disclosure - Financial Instruments - Summary of Information Regarding Notes Repaid (Parenthetical) (Detail) Network

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1419 Disclosure of detailed information about borrowings [table] Table

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1420 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1421 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1422 3.95% Notes, Due 2021 [member] Member tri:ThreePointNineFiveNotesDueTwoThousandTwentyOneMember
1423 3.85% Notes, Due 2024 [member] Member tri:ThreePointEightFiveNotesDueTwoThousandTwentyFourMember
1424 4.50% Notes, Due 2043 [member] Member tri:FourPointFiveZeroNotesDueTwoThousandFortyThreeMember
1425 Borrowing redemption [axis] Axis tri:BorrowingRedemptionAxis
1426 Borrowing redemption [domain] Member tri:BorrowingRedemptionDomain
1427 Partial Redemption [member] Member tri:PartialRedemptionMember
1428 Disclosure of detailed information about borrowings [Line Items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1429 Debt instrument, repaid amount Concept (Monetary) As Of Credit tri:BorrowingsRepayment
1430 1125 - Disclosure - Financial Instruments - Outstanding Instruments (Detail) Network

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1431 Disclosure of detailed information about hedges [table] Table

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1432 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
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1435 Type two [member] Member tri:TypeTwoMember
1436 Type three [member] Member tri:TypeThreeMember
1437 Disclosure of detailed information about hedges [Line Items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1438 Currency received Concept (Text/String) For Period tri:CurrencyAndInterestRateReceived
1439 Currency paid Concept (Text/String) For Period tri:CurrencyAndInterestRatePaid
1440 Hedged Risk Concept (Text/String) For Period ifrs-full:DescriptionOfTypeOfHedge
1441 Year of Maturity Concept (Text/String) For Period tri:FinancialInstrumentsDesignatedAsHedgingInstrumentsMaturity
1442 Principal Amount Concept (Monetary) As Of invest:DerivativeNotionalAmount
1443 1126 - Disclosure - Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Detail) Network

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1444 Disclosure of detailed information about hedges [table] Table

*

*

 ifrs-full:DisclosureOfHedgeAccountingTable
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1447 Canada, Dollars [member] Member currency:CAD
1448 United States of America, Dollars [member] Member currency:USD
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1450 Disclosure of detailed information about hedges [Line Items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1451 Borrowings after currency hedging arrangements Concept (Monetary) As Of Credit tri:DebtAfterCurrencyHedgingArrangements
1452 Borrowings before currency hedging arrangements Concept (Monetary) As Of Credit tri:DebtBeforeCurrencyHedgingArrangements
1453 1127 - Disclosure - Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Parenthetical) (Detail) Network

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1454 Implied Table Table

*

*

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1455 Disclosure of detailed information about hedges [abstract] Abstract ifrs-full:DisclosureOfHedgeAccountingAbstract
1456 Fair value - interest component of cross-currency interest rate swaps Concept (Monetary) As Of Credit tri:FairValueInterestComponentOfCrossCurrencyInterestRateSwaps
1457 1128 - Disclosure - Financial Instruments - Foreign Exchange Contracts - US Dollar Notional Amounts (Detail) Network

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*

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1458 Disclosure of detail information about forward contracts [table] Table

*

*

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1462 Long1 [member] Member tri:Long1Member
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1465 Euros Sell [member] Member tri:EurosSellMember
1466 British pound sterling buy [member] Member tri:BritishPoundSterlingBuyMember
1467 Japanese Yen Sell [member] Member tri:JapaneseYenSellMember
1468 Disclosure of detail information about forward contracts [line items] LineItems tri:DisclosureOfDetailInformationAboutForwardContractsLineItems
1469 Notional amounts of contracts outstanding Concept (Monetary) As Of ifrs-full:NotionalAmount
1470 1129 - Disclosure - Financial Instruments - Fair Value Gains and Losses from Derivative Financial Instruments (Detail) Network

*

*

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1471 Gains (losses) on change in fair value of derivatives [table] Table

*

*

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1472 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
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1475 Cross-currency interest rate swaps [member] Member tri:CrosscurrencyInterestRateSwapsMember
1476 Forward interest rate swaps - cash flow hedges [member] Member tri:ForwardInterestRateSwapsCashFlowHedgesMember
1477 Gains (losses) on change in fair value of derivatives [line items] LineItems tri:GainsLossesOnChangeInFairValueOfDerivativesLineItems
1478 Fair Value Gain (Loss) Through Earnings Concept (Monetary) As Of Credit tri:FinancialInstrumentsAtFairValueThroughProfitOrLoss
1479 Fair Value Gain (Loss) Through Equity Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax
1480 1130 - Disclosure - Financial Instruments - Fair Value Gains and Losses from Derivative Financial Instruments (Parenthetical) (Detail) Network

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1481 Gains (losses) on change in fair value of derivatives [table] Table

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*

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1490 Cross-currency interest rate swaps [member] Member tri:CrosscurrencyInterestRateSwapsMember
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1492 Fair Value Gain (Loss) Through Earnings Concept (Monetary) As Of Credit tri:FinancialInstrumentsAtFairValueThroughProfitOrLoss
1493 1131 - Disclosure - Financial Instruments - Currency Risk- Sensitivity Analysis (Detail) Network

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*

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1494 Disclosure of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [table] Table

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*

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1507 1132 - Disclosure - Financial Instruments - Disclosure of maturity analysis for non-derivative and derivative financial liabilities (Detail) Network

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1508 Disclosure of maturity analysis for derivative and non-derivative financial liabilities [table] Table

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*

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1514 Later than three years and not later than four years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
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1516 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
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1520 Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items] LineItems tri:DisclosureOfMaturityAnalysisForDerivativeAndNonderivativeFinancialLiabilitiesLineItems
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1522 Interest payable Concept (Monetary) As Of Debit tri:TotalFutureInterestOutflows
1523 Debt-related hedges outflows Concept (Monetary) As Of Credit tri:DebtRelatedHedgesOutflows
1524 Debt-related hedges inflows Concept (Monetary) As Of Debit tri:DebtRelatedHedgesInflows
1525 Commercial paper Concept (Monetary) As Of Credit ifrs-full:CommercialPapersIssued
1526 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesToTradeSuppliers
1527 Accruals Concept (Monetary) As Of Credit ifrs-full:Accruals
1528 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
1529 Total Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1530 1133 - Disclosure - Financial Instruments - Summary of Credit Ratings (Detail) Network

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1531 Disclosure of credit risk exposure [table] Table

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*

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1537 Fitch [member] Member tri:FitchMember
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1542 1134 - Disclosure - Financial Instruments - Net Debt (Detail) Network

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1543 Implied Table Table

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1546 Long-term indebtedness Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1547 Total debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
1548 Swaps Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
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1550 Remove fair value adjustments for hedges Concept (Monetary) As Of Debit tri:ReductionOfFairValueAdjustmentsForHedges
1551 Total debt after currency hedging arrangements Concept (Monetary) As Of Credit tri:DebtAfterCurrencyHedgingArrangements
1552 Remove transaction costs and discounts included in the carrying value of debt Concept (Monetary) As Of Debit tri:DebtIssuanceCost
1553 Less: cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1554 Net debt Concept (Monetary) As Of Credit ifrs-full:NetDebt
1555 1135 - Disclosure - Financial Instruments - Reconciliation of Movements of Liabilities to Cash Flows Arising from Financing Activities (Detail) Network

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1556 Disclosure of reconciliation of liabilities arising from financing activities [table] Table

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1562 Disclosure of reconciliation of liabilities arising from financing activities [Line Items] LineItems ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
1563 Balance at beginning of year Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
1564 Proceeds Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
1565 Repayments of debt Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
1566 Net borrowings under short-term loan facilities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings
1567 Foreign exchange movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
1568 Other, net Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
1569 Balance at end of year Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
1570 1136 - Disclosure - Financial Instruments - Summary of Fair Value Measurements Carried at Fair Value in the Consolidated Statement of Financial Position (Detail) Network

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1571 Disclosure of fair value measurement of assets [table] Table

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1845 Maximum number of common shares available for grant Concept (Decimal) As Of tri:MaximumNumberOfCommonSharesAvailableForGrant
1846 Maximum term of option Concept (Text/String) For Period ifrs-full:DescriptionOfMaximumTermOfOptionsGrantedForSharebasedPaymentArrangement
1847 Weighted average fair value of options granted Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
1848 Vesting period Concept (xbrli:durationItemType) For Period tri:VestingPeriodOfOtherEquityInstrument
1849 Percentage of options vested Concept (Percent) For Period tri:PercentageOfOtherEquityInstrumentVested
1850 Percentage of discount allowed for purchase of shares Concept (Percent) For Period tri:PercentageOfDiscountAllowedForEmployeeStockPurchasePlan
1851 Maximum payroll deduction allowed Concept (Monetary) For Period Debit tri:MaximumPayrollDeductionAllowedForEmployeeStockPurchasePlan
1852 Maximum shares to be purchased through plan Concept (Shares) For Period tri:MaximumSharesAllowedToBePurchasedForEmployeeStockPurchasePlan
1853 Weighted average share price at the time of exercise of awards Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise
1854 Withholding tax liabilities Concept (Monetary) As Of Credit ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011
1855 1154 - Disclosure - Share-Based Compensation - Stock Incentive Plans (Detail) Network

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1856 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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1857 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
1858 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
1859 Equity-settled [member] Member tri:EquitysettledPlansMember
1860 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1861 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1862 Stock Options [Member] Member tri:StockOption1Member
1863 TSRUs [Member] Member tri:TimeBasedRestrictedShareUnitMember
1864 PRSUs [Member] Member tri:PerformanceRestrictedShareUnitMember
1865 Disclosure of terms and conditions of share-based payment arrangement [Line Items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1866 Vesting period Concept (Text/String) For Period ifrs-full:DescriptionOfVestingRequirementsForSharebasedPaymentArrangement
1867 Fair Value Measure Concept (Text/String) For Period ifrs-full:DescriptionOfOptionPricingModelShareOptionsGranted
1868 Compensation expense Concept (Text/String) For Period ifrs-full:DescriptionOfMethodOfSettlementForSharebasedPaymentArrangement
1869 1155 - Disclosure - Share-Based Compensation - Fair Value Measurement of Stock Options (Detail) Network

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1870 Implied Table Table

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1871 Disclosure of Weighted average fair value [abstract] Abstract tri:DisclosureOfWeightedAverageFairValueAbstract
1872 Weighted-average fair value Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
1873 Share price Concept (Monetary) For Period ifrs-full:WeightedAverageSharePriceShareOptionsGranted
1874 Exercise price Concept (Monetary) For Period ifrs-full:ExercisePriceShareOptionsGranted
1875 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
1876 Dividend yield Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
1877 Volatility factor Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
1878 Expected life (in years) Concept (Decimal) For Period ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
1879 1156 - Disclosure - Share-Based Compensation - Number of Awards Outstanding (Detail) Network

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1880 Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [table] Table

*

*

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1881 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1882 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1883 TSRUs [Member] Member tri:TimeBasedRestrictedShareUnitMember
1884 PRSUs [Member] Member tri:PerformanceRestrictedShareUnitMember
1885 SARs [Member] Member tri:ShareAppreciationRightsMember
1886 Stock Options [Member] Member tri:StockOption1Member
1887 Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [line items] LineItems tri:DisclosureOfNumberAndWeightedAverageExercisePriceOfOutstandingAwardsLineItems
1888 Beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1889 Granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1890 Exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1891 Forfeited Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
1892 Ending balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1893 Exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1894 Beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1895 Granted Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1896 Exercised Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1897 Forfeited Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1898 Ending balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1899 Exercisable Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1900 Beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1901 Granted Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
1902 Exercised Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1903 Forfeited Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
1904 Ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1905 Exercisable Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1906 1157 - Disclosure - Share-Based Compensation - Number of Awards Outstanding (Parenthetical) (Detail) Network

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1907 Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [table] Table

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*

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1908 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1909 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1910 Financial & risk [member] Member tri:FinancialAndRiskMember
1911 Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [line items] LineItems tri:DisclosureOfNumberAndWeightedAverageExercisePriceOfOutstandingAwardsLineItems
1912 Percentage of ownership stake sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
1913 1158 - Disclosure - Share-Based Compensation - Summary of Share Based Compensation Expense (Detail) Network

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1914 Disclosure Of Share Based Compensation Expense [table] Table

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1915 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1916 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1917 Stock Options [Member] Member tri:StockOption1Member
1918 TSRUs [Member] Member tri:TimeBasedRestrictedShareUnitMember
1919 PRSUs [Member] Member tri:PerformanceRestrictedShareUnitMember
1920 Employee Stock Purchase Plan [member] Member tri:EmployeeStockPurchasePlanMember
1921 Disclosure Of Share Based Compensation Expense [line items] LineItems tri:DisclosureOfShareBasedCompensationExpenseLineItems
1922 Share-based compensation expense Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
1923 Share-based compensation expense including expense related to revaluation of withholding taxes on share-based awards Concept (Monetary) For Period Debit tri:ExpenseFromShareBasedPaymentTransactionsWithEmployeesShareBasedCompensationIncludingExpenseRelatingToRevaluationOfWithholdingTaxes
1924 1159 - Disclosure - Share-Based Compensation - Summary of Additional Information Relating to Stock Options and SAR's (Detail) Network

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1925 Disclosure of range of exercise prices of outstanding share options [table] Table

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1926 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
1927 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
1928 0.00-30.00 [Member] Member tri:RangeOneMember
1929 30.01 - 35.00 [Member] Member tri:RangeTwoMember
1930 35.01 - 40.00 [Member] Member tri:RangeThreeMember
1931 40.01 - 45.00 [Member] Member tri:RangeFourMember
1932 Disclosure of range of exercise prices of outstanding share options [Line Items] LineItems ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems
1933 Number Oustanding Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1934 Weighted-Average Remaining Life Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
1935 Weighted-Average Exercise Price - Outstanding Awards Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1936 Number Exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1937 Weighted-Average Exercise Price - Exercisable Awards Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1938 1160 - Disclosure - Employee Benefit Plans - Additional Information (Detail) Network

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1939 Disclosure of defined benefit plans [table] Table

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1940 Range [axis] Axis ifrs-full:RangeAxis
1941 Ranges [member] Member ifrs-full:RangesMember
1942 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1943 Top of range [member] Member ifrs-full:TopOfRangeMember
1944 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1945 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1946 Financial & risk [member] Member tri:FinancialAndRiskMember
1947 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1948 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1949 U.K. [Member] Member country:GB
1950 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1951 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1952 Defined Benefit Plan [Member] Member tri:DefinedBenefitPlanMember
1953 Thomson reuters group pension plan [member] Member tri:ThomsonReutersGroupPensionPlanMember
1954 T R G P And T T C Plans [member] Member tri:TRGPAndTTCPlansMember
1955 Material defined benefit plans [Member] Member tri:MaterialDefinedBenefitPlansMember
1956 Funded Plans [member] Member tri:FundedPlansMember
1957 OPEB [Member] Member tri:OPEBMember
1958 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
1959 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
1960 Discount Rate [Member] Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1961 Rates of Inflation [Member] Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflationMember
1962 Rate of Increase in Salaries [Member] Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember
1963 Medical Cost Trend [Member] Member ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember
1964 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1965 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1966 Employee Benefit Expense [member] Member tri:EmployeeBenefitExpenseMember
1967 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
1968 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
1969 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
1970 Segments [axis] Axis ifrs-full:SegmentsAxis
1971 Segments [member] Member ifrs-full:SegmentsMember
1972 Financial & risk [member] Member tri:FinancialAndRiskMember
1973 Other Operating Income Expense [axis] Axis tri:OtherOperatingIncomeExpenseAxis
1974 Other Operating Income Expense [domain] Member tri:OtherOperatingIncomeExpenseDomain
1975 Other operating gains, net [member] Member tri:OtherOperatingGainsNetMember
1976 Disclosure of defined benefit plans [Line Items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1977 Percentage of ownership stake sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
1978 Normal Retirement Age Concept (xbrli:durationItemType) For Period tri:NormalRetirementAge
1979 Curtailment gains Concept (Monetary) For Period Credit ifrs-full:PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
1980 Enhanced benefits, recognized Concept (Monetary) For Period Debit tri:PastServiceCost
1981 Purchase of annuity insurance contract liability Concept (Monetary) For Period Credit tri:PurchaseOfAnnuityInsuranceContractLiability
1982 Payment to acquire annuity contract from third party Concept (Monetary) For Period Credit tri:PaymentsToAcquireAnnuityContractsFromThirdParty
1983 Settlement loss of annuity contract from third party Concept (Monetary) For Period Debit ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
1984 Employer contribution to defined benefit plans Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1985 Pension contribution Concept (Monetary) For Period Debit tri:PensionContribution
1986 Expected employer contribution to be made in 2019 Concept (Monetary) For Period Credit ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1987 Percentage of reasonably possible change in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
1988 Change in defined benefit obligation due to reasonably possible change in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
1989 Percentage of reasonably possible change in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
1990 Change in defined benefit obligation due to reasonably possible change in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
1991 Medical cost trend rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
1992 Increase in life expectancy Concept (xbrli:durationItemType) For Period tri:IncreaseInLifeExpectancy
1993 Post-employment benefit expense, defined contribution plans Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
1994 1161 - Disclosure - Employee Benefits Plan - Net Defined Benefit Plan Obligations (Detail) Network

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1995 Disclosure of net defined benefit liability (asset) [table] Table

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1996 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1997 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1998 Defined Benefit Plan [Member] Member tri:DefinedBenefitPlanMember
1999 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2000 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
2001 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
2002 Continuing Operations [member] Member tri:ContinuingOperations1Member
2003 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2004 Disclosure of net defined benefit liability (asset) [Line Items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2005 Beginning of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2006 Plan expense recognized in income statement: Abstract tri:PlanExpenseBenefitRecognizedInIncomeStatementAbstract
2007 Plan expense benefit recognized in income statement Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
2008 Actuarial gains Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
2009 Exchange differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
2010 Contributions paid Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
2011 Disposals of businesses Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset
2012 Other Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2013 End of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2014 Net plan surpluses recognized in non-current assets Concept (Monetary) As Of Debit ifrs-full:RecognisedAssetsDefinedBenefitPlan
2015 Net plan obligations recognized in non-current liabilities Concept (Monetary) As Of Credit ifrs-full:RecognisedLiabilitiesDefinedBenefitPlan
2016 1162 - Disclosure - Employee Benefits Plan - Summary of Net Surpluses (Obligations) of Material Defined Benefit Plans (Detail) Network

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2017 Disclosure of defined benefit plans [table] Table

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2018 Defined Benefit Plans Additional Information [axis] Axis tri:DefinedBenefitPlansAdditionalInformationAxis
2019 Defined Benefit Plans Additional Information [domain] Member tri:DefinedBenefitPlansAdditionalInformationDomain
2020 Material defined benefit plans [Member] Member tri:MaterialDefinedBenefitPlansMember
2021 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2022 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2023 Funded Plans [member] Member tri:FundedPlansMember
2024 UnFunded Plans [member] Member tri:UnfundedPlansMember
2025 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2026 Disclosure of defined benefit plans [Line Items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2027 Present value of plan obligations Concept (Monetary) As Of Credit ifrs-full:DefinedBenefitObligationAtPresentValue
2028 Fair value of plan assets Concept (Monetary) As Of Debit ifrs-full:PlanAssetsAtFairValue
2029 Total Concept (Monetary) As Of Debit ifrs-full:SurplusDeficitInPlan
2030 Unrecognized plan assets Concept (Monetary) As Of Debit tri:UnrecognizedPlanAssets
2031 Net plan obligations Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2032 Net plan surpluses Concept (Monetary) As Of Debit ifrs-full:RecognisedAssetsDefinedBenefitPlan
2033 Net plan obligations Concept (Monetary) As Of Credit ifrs-full:RecognisedLiabilitiesDefinedBenefitPlan
2034 1163 - Disclosure - Employee Benefits Plan - Summary of Activity in Defined Benefit Obligation (Detail) Network

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2035 Disclosure of net defined benefit liability (asset) [table] Table

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2036 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2037 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2038 Funded Plans [member] Member tri:FundedPlansMember
2039 UnFunded Plans [member] Member tri:UnfundedPlansMember
2040 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2041 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2042 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2043 Present Value of Defined Benefit Obligation [Member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2044 Disclosure of net defined benefit liability (asset) [Line Items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2045 Beginning of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2046 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
2047 Administration fees Concept (Monetary) For Period Credit tri:AdministrationFeesDefinedBenefitLiabilityAsset
2048 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2049 Actuarial gains (losses) from changes in financial assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
2050 Actuarial gains from changes in demographic assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
2051 Experience gains (losses) Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
2052 Contributions by employees Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
2053 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
2054 Administration fees disbursements Concept (Monetary) For Period Debit tri:AdministrationFeesDisbursementsDefinedBenefitLiabilityAsset
2055 Settlement Concept (Monetary) For Period Debit ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
2056 Curtailment gain (loss) Concept (Monetary) For Period Credit ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
2057 Disposals of businesses Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset
2058 Exchange differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
2059 Other Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2060 End of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2061 1164 - Disclosure - Employee Benefits Plan - Defined Benefit Obligation - Other Disclosures (Detail) Network

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2062 Disclosure of net defined benefit liability (asset) [table] Table

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2063 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
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2065 Present Value of Defined Benefit Obligation [Member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2066 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2067 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2068 Percentage of Participants in Defined Benefits Plans [Member] Member tri:PercentageOfParticipantsInDefinedBenefitsPlansMember
2069 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2070 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2071 U.S. [member] Member country:US
2072 U.K. [Member] Member country:GB
2073 Rest of World [Member] Member tri:RestOfWorldMember
2074 Disclosure of net defined benefit liability (asset) [Line Items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2075 Percentage attributable to active employees Concept (Percent) For Period tri:PercentageOfDefinedBenefitObligationAttributableToActiveEmployees
2076 Percentage attributable to deferred (former employees) Concept (Percent) For Period tri:PercentageOfDefinedBenefitObligationAttributableToFormerEmployeesNotRetired
2077 Percentage attributable to retirees Concept (Percent) For Period tri:PercentageOfDefinedBenefitObligationAttributableToRetiredEmployees
2078 Total participation Concept (Percent) For Period tri:PercentageOfParticipantsInDefinedBenefitsPlans
2079 Employee participation percentage Concept (Percent) For Period tri:PercentageOfDefinedBenefitObligationAttributableToParticipantsByGeography
2080 1165 - Disclosure - Employee Benefits Plan - Summary of Defined Benefit Obligation Analyzed by Participant Group and Geography (Detail) Network

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2081 Disclosure of net defined benefit liability (asset) [table] Table

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2082 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2083 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2084 Thomson reuters group pension plan [member] Member tri:ThomsonReutersGroupPensionPlanMember
2085 Reuters pension fund [member] Member tri:ReutersPensionFundMember
2086 Supplementary pension scheme [member] Member tri:SupplementaryPensionSchemeMember
2087 The thomson corporation PLC pension scheme [member] Member tri:TheThomsonCorporationPLCPensionSchemeMember
2088 Disclosure of net defined benefit liability (asset) [Line Items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2089 Weighted average duration of defined benefit obligation Concept (Decimal) For Period ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
2090 1166 - Disclosure - Employee Benefits Plan - Summary of Defined Benefit Obligation Analyzed by Participant Group and Geography (Parenthetical) (Detail) Network

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2091 Disclosure of net defined benefit liability (asset) [table] Table

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2092 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
2093 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
2094 Financial & risk [member] Member tri:FinancialAndRiskMember
2095 Disclosure of net defined benefit liability (asset) [Line Items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2096 Percentage of ownership sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
2097 1167 - Disclosure - Employee Benefits Plan - Fair Value of Plan Assets (Detail) Network

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2098 Disclosure of fair value of plan assets [table] Table

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2101 Funded Plans [member] Member tri:FundedPlansMember
2102 UnFunded Plans [member] Member tri:UnfundedPlansMember
2103 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2104 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2105 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2106 Fair Value of Plan Assets [Member] Member ifrs-full:PlanAssetsMember
2107 Disclosure of fair value of plan assets [Line Items] LineItems ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
2108 Beginning of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2109 Interest income Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2110 Return on plan assets excluding amounts included in interest income Concept (Monetary) For Period Debit ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
2111 Contributions by employer Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
2112 Contributions by employees Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
2113 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
2114 Administration fees disbursements Concept (Monetary) For Period Debit tri:AdministrationFeesDisbursementsDefinedBenefitLiabilityAsset
2115 Settlement Concept (Monetary) For Period Debit ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
2116 Disposals of businesses Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset
2117 Exchange differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
2118 Other Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2119 End of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2120 1168 - Disclosure - Employee Benefits Plan - Summary of Major Categories of Plan Assets for Funded Plans (Detail) Network

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2121 Disclosure of fair value of plan assets [table] Table

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*

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2122 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
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2124 Quoted Plan Assets [Member] Member tri:QuotedPlanAssetsMember
2125 Unquoted Plan Assets [Member] Member tri:UnquotedPlanAssetsMember
2126 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
2127 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
2128 Corporate Bonds [Member] Member tri:CorporateBondsMember
2129 Government Bonds [Member] Member tri:GovernmentBondsMember
2130 Other Fixed Income [Member] Member tri:OtherFixedIncomeMember
2131 Multi-Asset [Member] Member tri:MultiAssetMember
2132 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2133 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2134 U.S. [member] Member country:US
2135 U.K. [Member] Member country:GB
2136 All Other Countries [Member] Member tri:AllOtherCountriesMember
2137 Disclosure of fair value of plan assets [Line Items] LineItems ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
2138 Equities Concept (Monetary) As Of Debit ifrs-full:EquityInstrumentsAmountContributedToFairValueOfPlanAssets
2139 Bonds Concept (Monetary) As Of Debit ifrs-full:DebtInstrumentsAmountContributedToFairValueOfPlanAssets
2140 Multi-asset Concept (Monetary) As Of Debit ifrs-full:InvestmentFundsAmountContributedToFairValueOfPlanAssets
2141 Property Concept (Monetary) As Of Debit ifrs-full:PropertyAmountContributedToFairValueOfPlanAssets
2142 Insurance Concept (Monetary) As Of Debit tri:InsuranceAmountContributedToFairValueOfPlanAssets
2143 Derivatives Concept (Monetary) As Of Debit ifrs-full:DerivativesAmountContributedToFairValueOfPlanAssets
2144 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets
2145 Other Concept (Monetary) As Of Debit ifrs-full:OtherAssetsAmountContributedToFairValueOfPlanAssets
2146 Total Concept (Monetary) As Of Debit ifrs-full:PlanAssetsAtFairValue
2147 1169 - Disclosure - Employee Benefits Plan - Summary of Weighted-Average Actuarial Assumptions (Detail) Network

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2148 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

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2151 Funded Plans [member] Member tri:FundedPlansMember
2152 UnFunded Plans [member] Member tri:UnfundedPlansMember
2153 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2154 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
2155 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2156 Inflation assumption Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
2157 Rate of increase in salaries Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
2158 Rate of increase in pension payments Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfPensionIncreases
2159 Medical cost trend Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
2160 1170 - Disclosure - Employe Benfits Plan - Summary of Life Expectation in Years of an Average Plan Participant (Detail) Network

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2161 Implied Table Table

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2162 Disclosure of sensitivity analysis for actuarial assumptions [abstract] Abstract ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsAbstract
2163 Male employee retiring at age 65 Concept (xbrli:durationItemType) For Period tri:LifeExpectationPeriodOfMaleEmployeesRetiringAtAgeSixtyFive
2164 Male employee age 40 retiring at age 65 Concept (xbrli:durationItemType) For Period tri:LifeExpectationPeriodOfMaleEmployeesAgeAtFortyAndRetiringAtAgeSixtyFive
2165 Female employee retiring at age 65 Concept (xbrli:durationItemType) For Period tri:LifeExpectationPeriodOfFemaleEmployeesRetiringAtAgeSixtyFive
2166 Female employee age 40 retiring at age 65 Concept (xbrli:durationItemType) For Period tri:LifeExpectationPeriodOfFemaleEmployeesAgeAtFortyAndRetiringAtAgeSixtyFive
2167 1171 - Disclosure - Employee Benefits Plan - Summary of Defined Benefit Plan Expense (Detail) Network

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2168 Disclosure of defined benefit plan expense [table] Table

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2169 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
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2171 Funded Plans [member] Member tri:FundedPlansMember
2172 UnFunded Plans [member] Member tri:UnfundedPlansMember
2173 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2174 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
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2176 Continuing Operations [member] Member tri:ContinuingOperations1Member
2177 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2178 Disclosure of defined benefit plan expense [line items] LineItems tri:DisclosureOfDefinedBenefitPlanExpenseLineItems
2179 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
2180 Net interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2181 Administration fees Concept (Monetary) For Period Debit tri:AdministrationFeesDisbursementsDefinedBenefitLiabilityAsset
2182 Curtailment gain Concept (Monetary) For Period Credit ifrs-full:PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
2183 Plan amendments Concept (Monetary) For Period Debit tri:PlanAmendmentsDefinedBenefitLiabilityAsset
2184 Settlement loss Concept (Monetary) For Period Debit ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
2185 Defined benefit plan expense Concept (Monetary) For Period Debit tri:PostemploymentBenefitExpenseDefinedBenefitMaterialPlans
2186 1172 - Disclosure - Employee Benefits Plan - Summary of Defined Benefit Plan Expense (Parenthetical) (Detail) Network

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2187 Disclosure of defined benefit plan expense [table] Table

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 tri:DisclosureOfDefinedBenefitPlanExpenseTable
2188 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
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2190 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2191 Disclosure of defined benefit plan expense [line items] LineItems tri:DisclosureOfDefinedBenefitPlanExpenseLineItems
2192 Curtailment gain Concept (Monetary) For Period Credit ifrs-full:PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
2193 1173 - Disclosure - Employee Benefits Plan - Summary of Amounts Recognized in Other Comprehensive Loss (Income) for Material Defined Benefit Plans (Detail) Network

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2194 Disclosure of net defined benefit liability (asset) [table] Table

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*

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2195 Defined Benefit Plans Additional Information [axis] Axis tri:DefinedBenefitPlansAdditionalInformationAxis
2196 Defined Benefit Plans Additional Information [domain] Member tri:DefinedBenefitPlansAdditionalInformationDomain
2197 Material defined benefit plans [Member] Member tri:MaterialDefinedBenefitPlansMember
2198 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2199 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2200 Funded Plans [member] Member tri:FundedPlansMember
2201 UnFunded Plans [member] Member tri:UnfundedPlansMember
2202 Other Post Employment Benefits [Member] Member tri:OtherPostEmploymentBenefitsMember
2203 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
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2206 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2207 Disclosure of net defined benefit liability (asset) [Line Items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2208 Remeasurement (gains) losses on defined benefit obligation: Abstract ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAssetAbstract
2209 Due to financial assumption changes Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
2210 Due to demographic assumption changes Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
2211 Due to experience Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
2212 Return on plan assets greater than discount rate Concept (Monetary) For Period Debit ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
2213 Change in irrecoverable surplus other than interest Concept (Monetary) For Period Debit ifrs-full:GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling
2214 Total recognized in other comprehensive (income) loss before taxation Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
2215 Balance of actuarial losses (gains) at January 1 Concept (Monetary) As Of Credit tri:ActuarialGainsLossesNetDefinedBenefitLiabilityAsset
2216 Net actuarial losses (gains) recognized in the year Concept (Monetary) For Period Credit tri:NetActuarialGainsAndLosses
2217 Balance of actuarial losses (gains) at December 31 Concept (Monetary) As Of Credit tri:ActuarialGainsLossesNetDefinedBenefitLiabilityAsset
2218 Balance of asset ceiling at January 1 Concept (Monetary) As Of Credit tri:AssetCeilingBalance
2219 Interest cost on irrecoverable surplus Concept (Monetary) For Period Debit tri:InterestCostOnIrrecoverableSurplusNetDefinedBenefitAssetToAssetCeilingNetDefinedBenefitLiabilityAsset
2220 Effects of the asset ceiling in the year Concept (Monetary) For Period Debit tri:IncreaseDecreaseInAssetCeiling
2221 Balance of asset ceiling at December 31 Concept (Monetary) As Of Credit tri:AssetCeilingBalance
2222 Total accumulated comprehensive loss (income) at December 31 Concept (Monetary) For Period Credit tri:OtherComprehensiveIncomeBeforeTaxActuarialLossesGainsOnDefinedBenefitPlans
2223 1174 - Disclosure - Supplemental Cash Flow Information - Details of Other in the Consolidated Statement of Cash Flow (Detail) Network

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2224 Implied Table Table

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2225 Disclosure Of Other In Consolidated Statement Of Cash Flow [abstract] Abstract tri:DisclosureOfOtherInConsolidatedStatementOfCashFlowAbstract
2226 Non-cash employee benefit charges Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
2227 Net (gains) losses on foreign exchange and derivative financial instruments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
2228 Share of post-tax losses in equity method investments Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForUndistributedProfitsOfAssociates
2229 Other Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
2230 Total Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsToReconcileProfitLoss
2231 1175 - Disclosure - Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Detail) Network

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2232 Implied Table Table

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2233 Disclosure Of Changes In Working Capital And Other Items [abstract] Abstract tri:DisclosureOfChangesInWorkingCapitalAndOtherItemsAbstract
2234 Trade and other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
2235 Prepaid expenses and other current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
2236 Other financial assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherAssets
2237 Payables, accruals and provisions Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
2238 Deferred revenue Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
2239 Other financial liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherLiabilities
2240 Income taxes Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncomeTaxExpense
2241 Other Concept (Monetary) For Period Debit tri:AdjustmentsForOtherMiscellaneous
2242 Total Concept (Monetary) For Period Debit tri:TotalAdjustmentsForDecreaseIncreaseInWorkingCapitalAndOtherItems
2243 1176 - Disclosure - Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Parenthetical) (Detail) Network

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2244 Implied Table Table

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2245 Disclosure Of Changes In Working Capital And Other Items [abstract] Abstract tri:DisclosureOfChangesInWorkingCapitalAndOtherItemsAbstract
2246 Amount related to employee benefit plans Concept (Monetary) For Period Debit tri:AdjustmentsRelatedToEmployeeBenefitPlans
2247 1177 - Disclosure - Supplemental Cash Flow Information - Details of Income Taxes (Paid) Received (Detail) Network

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2248 Disclosure Of Income Taxes [table] Table

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*

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2249 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
2250 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
2251 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2252 Disclosure of income taxes [line items] LineItems tri:DisclosureOfIncomeTaxesLineItems
2253 Operating activities Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
2254 Investing activities - discontinued operations Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsInvestingActivities
2255 Total income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefund
2256 1178 - Disclosure - Supplemental Cash Flow Information - Details of Operating Cash Flows from Discontinued Operations (Detail) Network

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2257 Disclosure Of Cash Flows From Discontinued Operations [table] Table

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2258 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
2259 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
2260 Discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2261 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
2262 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
2263 Computer software [member] Member ifrs-full:ComputerSoftwareMember
2264 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
2265 Disclosure Of Cash Flows From Discontinued Operations [line items] LineItems tri:DisclosureOfCashFlowsFromDiscontinuedOperationsLineItems
2266 OPERATING ACTIVITIES - DISCONTINUED OPERATIONS Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
2267 Earnings from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
2268 Adjustments for: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
2269 Depreciation Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationExpense
2270 Amortization of computer software Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForAmortisationExpense
2271 Net gains on disposals of businesses and investments Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
2272 Deferred tax Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxExpense
2273 Other Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsToReconcileProfitLoss
2274 Changes in working capital and other items Concept (Monetary) For Period Credit tri:IncreaseDecreaseInWorkingCapitalAndOtherItems
2275 Operating cash flows from discontinued operations Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations
2276 1179 - Disclosure - Acquisitions - Summary of Acquisition Activity (Detail) Network

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2277 Implied Table Table

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2278 Disclosure of detailed information about business combination [abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
2279 Businesses acquired Concept (Integer) For Period tri:NumberOfTransactionsBusinessesAcquired
2280 Investments in businesses Concept (Integer) For Period tri:NumberOfTransactionsInvestmentsInBusinesses
2281 Total number of transactions Concept (Integer) For Period tri:NumberOfTransactions
2282 Businesses acquired Concept (Monetary) As Of Credit tri:CashPaidForAcquisitionOfBusinesses
2283 Less: Cash acquired Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2284 Businesses acquired, net of cash Concept (Monetary) For Period Credit tri:BusinessAcquiredPurchasePrice
2285 Contingent consideration payments Concept (Monetary) As Of Credit tri:ContingentConsiderationOne
2286 Investments in businesses Concept (Monetary) As Of Credit tri:InvestmentsInBusinessesRecognisedAsOfAcquisitionDate
2287 Total Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
2288 1180 - Disclosure - Acquisitions - Summary of Acquisition Activity (Parenthetical) (Detail) Network

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2289 Disclosure of detailed information about business combination [table] Table

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2290 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
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2293 Disclosure of detailed information about business combination [Line Items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2294 Equity contribution Concept (Monetary) For Period Credit tri:CapitalContribution
2295 Ownership interest Concept (Percent) As Of tri:PercentageOfOwnershipInterest
2296 1181 - Disclosure - Acquisitions - Summary of Net Assets Acquired (Detail) Network

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2297 Disclosure of detailed information about business combination [table] Table

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*

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2298 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2299 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2300 Business combinations [member] Member ifrs-full:BusinessCombinationsMember
2301 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
2302 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
2303 Computer software [member] Member ifrs-full:ComputerSoftwareMember
2304 Other identifiable intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
2305 Disclosure of detailed information about business combination [Line Items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2306 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2307 Trade receivables Concept (Monetary) As Of Debit tri:TradeReceivablesRecognisedAsOfAcquisitionDate
2308 Prepaid expenses and other current assets Concept (Monetary) As Of Debit tri:PrepaidExpensesAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate
2309 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsRecognisedAsOfAcquisitionDate
2310 Computer hardware and other property Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2311 Identifiable intangible assets Concept (Monetary) As Of Debit ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
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2313 Payables and accruals Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate
2314 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeRecognisedAsOfAcquisitionDate
2315 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilitiesRecognisedAsOfAcquisitionDate
2316 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesRecognisedAsOfAcquisitionDate
2317 Total liabilities Concept (Monetary) As Of Credit tri:LiabilitiesRecognisedAsOfAcquisitionDate
2318 Net assets acquired Concept (Monetary) As Of Debit ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2319 Goodwill Concept (Monetary) As Of Debit ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2320 Total Concept (Monetary) As Of Debit tri:BusinessAcquisitionPurchasePriceAllocationAndAssetsAcquiredLiabilitiesAssumedNet
2321 1182 - Disclosure - Contingencies, Commitments and Guarantees - Additional Information (Detail) Network

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2322 Implied Table Table

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2323 Commitment And Contingencies [abstract] Abstract tri:CommitmentAndContingenciesAbstract
2324 Operating lease payments Concept (Monetary) For Period Debit ifrs-full:LeaseAndSubleasePaymentsRecognisedAsExpense
2325 Total of future minimum sublease payments to be received under non-cancellable subleases Concept (Monetary) As Of Debit ifrs-full:ExpectedFutureMinimumSubleasePaymentsReceivableUnderNoncancellableSubleasesClassifiedAsOperatingLease
2326 Sublease payments received Concept (Monetary) For Period Credit ifrs-full:IncomeFromSubleasingRightofuseAssets
2327 1183 - Disclosure - Contingencies, Commitments and Guarantees - Summary of Future Aggregate Minimum Lease Payments under Non-Cancellable Operating Leases (Detail) Network

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2328 Disclosure of Future Unconditional Purchase Obligations [table] Table

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2329 Maturity [axis] Axis ifrs-full:MaturityAxis
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2333 Later than two years and not later than three years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2334 Later than three years and not later than four years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2335 Later than four years and not later than five years [member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2336 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
2337 Disclosure of finance lease and operating lease by lessee [Line Items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
2338 Future aggregate minimum lease payments under non-cancellable operating leases Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2339 1184 - Disclosure - Contingencies, Commitments and Guarantees - Summary of Future Unconditional Purchase Obligations (Detail) Network

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2340 Disclosure of Future Unconditional Purchase Obligations [table] Table

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 tri:DisclosureOfFutureUnconditionalPurchaseObligationsTable
2341 Maturity [axis] Axis ifrs-full:MaturityAxis
2342 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2343 Not later than one year [member] Member ifrs-full:NotLaterThanOneYearMember
2344 Later than one year and not later than two years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2345 Later than two years and not later than three years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2346 Later than three years and not later than four years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2347 Later than four years and not later than five years [member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2348 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
2349 Disclosure of Future Unconditional Purchase Obligations [line items] LineItems tri:DisclosureOfFutureUnconditionalPurchaseObligationsLineItems
2350 Future unconditional purchase obligations Concept (Monetary) As Of Credit tri:FutureUnconditionalPurchaseObligations
2351 1185 - Disclosure - Related Party Transactions - Additional Information (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformation
2352 Disclosure of transactions between related parties [table] Table

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 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2353 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2354 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2355 Woodbridge [member] Member tri:WoodbridgeMember
2356 Refinitiv [member] Member tri:RefinitivMember
2357 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2358 Recurring [member] Member ifrs-full:ProductsAndServicesMember
2359 news and editorial [member] Member tri:NewsAndEditorialMember
2360 Legal Entity [Axis] Axis dei:LegalEntityAxis
2361 Entity [Domain] Member dei:EntityDomain
2362 Reuters News [member] Member tri:ReutersNewsMember
2363 Range [axis] Axis ifrs-full:RangeAxis
2364 Ranges [member] Member ifrs-full:RangesMember
2365 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2366 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
2367 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
2368 Financial & risk [member] Member tri:FinancialAndRiskMember
2369 Refinitiv [member] Member tri:RefinitivMember
2370 Other associates and joint ventures [member] Member tri:OtherAssociatesAndJointVenturesMember
2371 Disclosure of transactions between related parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2372 Beneficial ownership of shares Concept (Percent) For Period tri:PercentageOfOwnershipHeldByRelatedParty
2373 Proceeds from sale of subsidiary Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughDisposalOfSubsidiary
2374 Gain recorded on sale of subsidiaries Concept (Monetary) For Period Credit tri:GainOnSaleOfSubsidiary
2375 Amount returned to shareholders Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
2376 Number of shares repurchased Concept (Shares) For Period tri:NumberOfCommonSharesPurchased
2377 Price per share paid Concept (Share) For Period tri:SharePricePaid
2378 Number of shares sold through proportoinate tender Concept (Shares) As Of tri:NumberOfSharesTendered
2379 Percentage of ownership stake sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
2380 Ownership interest retained percentage Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
2381 Agreement maturity period Concept (xbrli:durationItemType) For Period tri:AgreementMaturityPeriod
2382 Revenue Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
2383 Receipts for news and content Concept (Monetary) For Period Debit tri:ReceiptsForNewsAndContent
2384 Other operating gains, net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
2385 Future aggregate minimum lease payments Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
2386 Minimum lease payments payable under non-cancellable operating lease Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2387 Purchase obligations Concept (Monetary) As Of Credit tri:FutureUnconditionalPurchaseObligations
2388 Purchase obligations Concept (Monetary) As Of Debit tri:FutureUnconditionalPurchaseCommitment
2389 Lease receivable amount Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
2390 Lease payment amount Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
2391 Area of office space Concept (num:areaItemType) For Period tri:AreaOfOfficeSpace
2392 Costs under lease arrangement Concept (Monetary) For Period ifrs-full:LeasesAsLesseeRelatedPartyTransactions
2393 1186 - Disclosure - Related Party Transactions - Summary of Expense or Contra-Expense (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSummaryOfExpenseOrContraExpense
2394 Disclosure of expenses [table] Table

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 tri:DisclosureOfExpensesTable
2395 Transactions with of related parties [axis] Axis tri:TransactionsWithOfRelatedPartiesAxis
2396 Transactions with of related parties [member] Member tri:TransactionsWithOfRelatedPartiesMember
2397 Transitional services [member] Member tri:TransitionalServicesMember
2398 Properties leased [member] Member tri:PropertiesLeasedMember
2399 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2400 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2401 Refinitiv [member] Member tri:RefinitivMember
2402 Disclosure of expenses [line items] LineItems tri:DisclosureOfExpensesLineItems
2403 Provided by Thomson Reuters to Refinitiv Contra-expense Concept (Monetary) For Period Credit tri:IncomeFromServicesProvidedToRelatedParty
2404 Provided by Refinitiv to Thomson Reuters (Expense) Concept (Monetary) For Period Debit tri:ExpenseFromServicesProvidedByRelatedParty
2405 1187 - Disclosure - Related Party Transactions - Summary of Key Management Personnel Compensation, Including Directors (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSummaryOfKeyManagementPersonnelCompensationIncludingDirectors
2406 Implied Table Table

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 implied:Table
2407 Related party transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
2408 Salaries and other benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2409 Share-based payments Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
2410 Total compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
2411 1188 - Disclosure - Subsequent Events - Additional Information (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureSubsequentEventsAdditionalInformation
2412 Disclosure of non-adjusting events after reporting period [table] Table

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 ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
2413 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2414 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
2415 Dividend announcement [member] Member tri:DividendAnnouncementMember
2416 Pension contribution announcement [member] Member tri:PensionContributionAnnouncementMember
2417 Major Ordinary Share Transactions [Member] Member ifrs-full:MajorOrdinaryShareTransactionsMember
2418 Dividend [axis] Axis tri:DividendAxis
2419 Dividend [domain] Member tri:DividendDomain
2420 Annualized dividend [member] Member tri:AnnualizedDividendMember
2421 Quarterly dividend [member] Member tri:QuarterlyDividendMember
2422 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2423 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2424 U.K. [Member] Member country:GB
2425 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2426 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2427 T T C Plans [member] Member tri:TTCPlansMember
2428 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
2429 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
2430 Financial & risk [member] Member tri:FinancialAndRiskMember
2431 Disclosure of non-adjusting events after reporting period [Line Items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2432 Dividend approved, per share Concept (Share) For Period ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
2433 Increase in authorized dividend Concept (Share) For Period tri:IncreaseDecreaseInDividendProposedOrDeclaredPerShare
2434 Pension contribution Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities
2435 Percentage of ownership stake sold Concept (Percent) For Period tri:PercentageOfOwnershipSold
2436 Repurchase of common shares Concept (Monetary) For Period Debit ifrs-full:PurchaseOfTreasuryShares

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