Thomson Reuters (TRI) 40-F 10 Mar 21 2020 FY Annual report (Canada) Financial data

Cover Page

Cover Page	12 Months Ended
	Dec. 31, 2020shares
Cover [Abstract]
Document Type	40-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Registrant Name	THOMSON REUTERS CORP /CAN/
Entity Central Index Key	0001075124
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Address, Country	CA
Entity Incorporation, State or Country Code	A6
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding	497,117,528
ICFR Auditor Attestation Flag	true

Consolidated Income Statement

Consolidated Income Statement - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CONTINUING OPERATIONS
Revenues	$ 5,984	$ 5,906
Operating expenses	(3,999)	(4,413)
Depreciation	(184)	(154)
Other operating gains, net	736	423
Operating profit	1,929	1,199
Finance costs, net:
Net interest expense	(195)	(163)
Other finance income (costs)	30	(65)
Income before tax and equity method investments	1,764	971
Share of post-tax losses in equity method investments	(544)	(599)
Tax (expense) benefit	(71)	1,198
Earnings from continuing operations	1,149	1,570
Loss from discontinued operations, net of tax	(27)	(6)
Net earnings	1,122	1,564
Earnings attributable to common shareholders	$ 1,122	$ 1,564
Basic earnings per share
From continuing operations	$ 2.31	$ 3.13
From discontinued operations	(0.06)	(0.01)
Basic earnings per share	2.25	3.12
Diluted earnings per share
From continuing operations	2.30	3.12
From discontinued operations	(0.05)	(0.01)
Diluted earnings per share	$ 2.25	$ 3.11
Computer software [member]
CONTINUING OPERATIONS
Amortization	$ (485)	$ (449)
Other identifiable intangible assets [member]
CONTINUING OPERATIONS
Amortization	$ (123)	$ (114)

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement [LineItems]
Net earnings	$ 1,122	$ 1,564
Items that have been or may be subsequently reclassified to net earnings:
Cash flow hedges adjustments to net earnings	(108)	(20)
Cash flow hedges adjustments to equity	97	14
Foreign currency translation adjustments to equity	(12)	109
Share of other comprehensive income (loss) in equity method investments	146	(27)
Related tax (expense) benefit on share of other comprehensive income (loss) in equity method investments	(35)	7
Reclassification of foreign currency translation adjustments on disposal of businesses		9
Other comprehensive income that will be reclassified to profit or loss, net of tax	88	92
Items that will not be reclassified to net earnings:
Fair value adjustments on financial assets	5	7
Remeasurement on defined benefit pension plans	78	(53)
Related tax benefit (expense) on remeasurement on defined benefit pension plans	(17)	12
Share of other comprehensive income (loss) in equity method investments	3	(8)
Related tax (expense) benefit on share of other comprehensive income (loss) in equity method investments	(1)	2
Other comprehensive income that will not be reclassified to profit or loss, net of tax	68	(40)
Other comprehensive income	156	52
Total comprehensive income	1,278	1,616
Comprehensive income (loss) for the period attributable to:
Total comprehensive income	1,278	1,616
Continuing Operations [member]
Comprehensive income (loss) for the period attributable to:
Common shareholders	1,305	1,622
Discontinued operations [member]
Comprehensive income (loss) for the period attributable to:
Common shareholders	$ (27)	$ (6)

Consolidated Statement of Finan

Consolidated Statement of Financial Position - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 1,787	$ 825
Trade and other receivables	1,151	1,167
Other financial assets	612	533
Prepaid expenses and other current assets	425	546
Current assets	3,975	3,071
Property and equipment, net	545	615
Computer software, net	830	900
Other identifiable intangible assets, net	3,427	3,518
Goodwill	5,976	5,853
Equity method investments	1,136	1,551
Other non-current assets	788	611
Deferred tax	1,204	1,176
Total assets	17,881	17,295
Liabilities
Current indebtedness		579
Payables, accruals and provisions	1,410	1,373
Deferred revenue	866	833
Other financial liabilities	376	434
Current liabilities	2,652	3,219
Long-term indebtedness	3,772	2,676
Provisions and other non-current liabilities	1,083	1,264
Deferred tax	394	576
Total liabilities	7,901	7,735
Equity
Capital	5,458	5,377
Retained earnings	5,211	4,965
Accumulated other comprehensive loss	(689)	(782)
Total equity	9,980	9,560
Total liabilities and equity	$ 17,881	$ 17,295

Consolidated Statement of Cash

Consolidated Statement of Cash Flow - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Earnings from continuing operations	$ 1,149	$ 1,570
Adjustments for:
Depreciation	184	154
Net (gains) losses on disposals of businesses and investments	(471)	3
Deferred tax	(231)	(1,395)
Other	421	385
Pension contribution		(167)
Changes in working capital and other items	102	(247)
Operating cash flows from continuing operations	1,762	866
Operating cash flows from discontinued operations	(17)	(164)
Net cash provided by operating activities	1,745	702
INVESTING ACTIVITIES
Acquisitions, net of cash acquired	(167)	(998)
Proceeds from disposals of businesses and investments	367	74
Capital expenditures	(504)	(505)
Proceeds from disposals of property and equipment	162	7
Other investing activities	4	9
Investing cash flows from continuing operations	(138)	(1,413)
Investing cash flows from discontinued operations		29
Net cash used in investing activities	(138)	(1,384)
FINANCING ACTIVITIES
Proceeds from debt	2,019
Repayments of debt	(1,645)
Net repayments under short-term loan facilities	(2)
Payments of lease principal	(75)	(51)
Repurchases of common shares	(200)	(488)
Other financing activities	(9)	39
Net cash used in financing activities	(644)	(1,201)
Increase (decrease) in cash and bank overdrafts	963	(1,883)
Translation adjustments	(1)	5
Cash and bank overdrafts at beginning of period	825	2,703
Cash and bank overdrafts at end of period	1,787	825
Cash and bank overdrafts at end of period comprised of:
Cash and cash equivalents	1,787	825
Supplemental cash flow information is provided in note 28.
Interest paid, net of debt-related hedges	(164)	(189)
Interest received	8	44
Income taxes paid	(164)	(314)
Preference shares [member]
FINANCING ACTIVITIES
Dividends paid	(2)	(3)
Common shares [member]
FINANCING ACTIVITIES
Dividends paid	(730)	(698)
Computer software [member]
Adjustments for:
Amortization expense	485	449
Other identifiable intangible assets [member]
Adjustments for:
Amortization expense	$ 123	$ 114

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Preference shares [member]	Number of common shares [member]	Stated share capital [member]	Contributed surplus [member]	Total capital [member]	Retained earnings [member]	Retained earnings [member]Preference shares [member]	Retained earnings [member]Number of common shares [member]	Unrecognized gain (loss) on financial instruments [member]	Foreign currency translation adjustments [member]	Total accumulated other comprehensive loss AOCL [member]
Balance (Adjustments Due to Adoption of IFRS 16 [member]) at Dec. 31, 2018	$ 11						$ 11
Balance (After IFRS 16 adoption [member]) at Dec. 31, 2018	9,221			$ 3,443	$ 1,905	$ 5,348	4,750			$ 10	$ (887)	$ (877)
Balance at Dec. 31, 2018	9,210			3,443	1,905	5,348	4,739			10	(887)	(877)
Statement [LineItems]
Net earnings	1,564						1,564
Dividends declared		$ (3)	$ (721)					$ (3)	$ (721)
Other comprehensive income (loss)	52						(43)			(13)	108	95
Shares issued under Dividend Reinvestment Plan ("DRIP")	23			23		23
Total comprehensive income (loss)	1,616						1,521			(13)	108	95
Repurchases of common shares	(450)			(48)		(48)	(402)
Pre-defined share repurchase plan	(200)			(20)		(20)	(180)
Stock compensation plans	74			178	(104)	74
Balance at Dec. 31, 2019	9,560			3,576	1,801	5,377	4,965			(3)	(779)	(782)
Statement [LineItems]
Net earnings	1,122						1,122
Dividends declared		$ (2)	$ (753)					$ (2)	$ (753)
Other comprehensive income (loss)	156						63			(5)	98	93
Shares issued under Dividend Reinvestment Plan ("DRIP")	23			23		23
Total comprehensive income (loss)	1,278						1,185			(5)	98	93
Repurchases of common shares				2		2	(2)
Pre-defined share repurchase plan	(200)			(18)		(18)	(182)
Stock compensation plans	74			136	(62)	74
Balance at Dec. 31, 2020	$ 9,980			$ 3,719	$ 1,739	$ 5,458	$ 5,211			$ (8)	$ (681)	$ (689)

Summary of Business and Signifi

Summary of Business and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Business and Significant Accounting Policies	Note 1: Summary of Business and Significant Accounting Policies General business description Thomson Reuters Corporation (the “Company” or “Thomson Reuters”) is an Ontario, Canada corporation with common shares listed on the Toronto Stock Exchange (“TSX”) and the New York Stock Exchange (“NYSE”) and Series II preference shares listed on the TSX. The Company is a leading provider of business information services. The Company’s products include highly specialized information-enabled software and tools for legal, tax, accounting and compliance professionals combined with the world’s most global news service – Reuters. These consolidated financial statements were approved by the Company’s board of directors on March 3, 2021. Basis of preparation These consolidated financial statements were prepared in accordance with International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board (“IASB”), on a going concern basis, under the historical cost convention, as modified by the revaluation of financial assets and financial liabilities (including derivative instruments) at fair value. The preparation of financial statements in accordance with IFRS requires the use of certain critical accounting estimates. It also requires management to exercise judgment in applying the Company’s accounting policies. The areas involving more judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements are disclosed in note 2. In the first quarter of 2020, the Company re-assessed Year ended December 31, 2019 As Reported Adjustments As Revised Revenues Legal Professionals 2,419 14 2,433 Corporates 1,321 (13) 1,308 Tax & Accounting Professionals 844 (1) 843 Reuters News 630 - 630 Global Print 693 - 693 Eliminations/Rounding (1) - (1) Total revenues 5,906 - 5,906 Adjusted EBITDA Legal Professionals 901 (6) 895 Corporates 433 (21) 412 Tax & Accounting Professionals 323 (5) 318 Reuters News 35 33 68 Global Print 295 (1) 294 Corporate costs (494) - (494) Total adjusted EBITDA 1,493 - 1,493 References to “$” are to U.S. dollars, references to “C$” are to Canadian dollars, references to “£” are to British pounds sterling and references to “ € Changes in accounting policies Effective January 1, 2019, the Company adopted IFRS 16, Leases Principles of consolidation The consolidated financial statements of the Company include the accounts of all of its subsidiaries. Subsidiaries Subsidiaries are entities over which the Company has control, where control is defined as the power to govern financial and operating policies. Generally, the Company has a shareholding of more than 50% of the voting rights in its subsidiaries. The effect of potential voting rights that are currently exercisable are considered when assessing whether control exists. Subsidiaries are fully consolidated from the date control is transferred to the Company, and are de-consolidated The acquisition method of accounting is used to account for the acquisition of subsidiaries as follows: · Acquisition cost is measured as the fair value of the assets given, equity instruments issued, and liabilities incurred or assumed at the date of exchange, excluding transaction costs which are expensed as incurred; · Identifiable assets acquired and liabilities assumed are measured at their fair values at the acquisition date; · The excess of acquisition cost over the fair value of the identifiable net assets acquired is recorded as goodwill; · If the acquisition cost is less than the fair value of the net assets acquired, the fair value of the net assets is re-assessed, · Contingent consideration is measured at fair value on the acquisition date, with subsequent changes in the fair value recorded through the consolidated income statement when the contingent consideration is a financial liability. Contingent consideration is not re-measured · Upon gaining control in a step acquisition, the existing ownership interest is re-measured Intercompany transactions between subsidiaries are eliminated in consolidation. Non-controlling Non-controlling Equity method investees Equity method investees are entities over which the Company has significant influence, but not control, and includes joint ventures, where the Company has joint control with one or more unaffiliated entities. Generally, the Company has a shareholding of between 20% and 50% of the voting rights in its equity method investees. Investments in equity method investees are accounted for using the equity method as follows: · Investments are initially recognized at cost and are reported in the consolidated statement of financial position; · Equity method investees include goodwill identified on acquisition, net of any accumulated impairment loss; · The Company’s share of post-acquisition profits or losses is recognized in the consolidated income statement and the Company’s share of other comprehensive income or losses is recognized in the consolidated statement of comprehensive income, and both are adjusted against the carrying amount of the investments; · When the Company’s share of losses equals or exceeds its interest in the investee, the Company does not recognize further losses, unless it has incurred obligations or made payments on behalf of the investee; · Gains and losses on transactions between the Company and its equity method investees are eliminated to the extent of the Company’s interest in these entities; · Dividends received or a receivable from equity method investees are recognized as a reduction in the carrying amount of the investment; and · Equity method investees are assessed for impairment whenever events or changes in circumstances indicate that their carrying value may not be recoverable and at the end of each reporting period for indicators of impairment. Upon loss of significant influence, any retained interest in the investee is remeasured to its fair value with the change in carrying amount recognized in other operating gains or losses in the consolidated income statement. The accounting policies of subsidiaries and equity method investees were changed where necessary to ensure consistency with the Company’s policies. Operating segments The Company’s operating segments are organized around the customers it serves and are reported in a manner consistent with the internal reporting provided to the chief operating decision-maker (“CODM”). The Chief Executive Officer has authority for resource allocation and assessment of the Company’s performance and is therefore the CODM. Foreign currency The consolidated financial statements are presented in U.S. dollars, which is the Company’s presentation currency. The financial statements of each of the Company’s subsidiaries are measured using the currency of the primary economic environment in which the subsidiary operates (the “functional currency”). · Assets and liabilities of entities with functional currencies other than U.S. dollars are translated to U.S. dollars at the period end rates of exchange, and the results of their operations are translated at average rates of exchange for the period. The resulting translation adjustments are included in accumulated other comprehensive loss in shareholders’ equity. For entities operating in countries where the currency has been designated as hyperinflationary, the assets, liabilities and results of their operations are translated at the period end rates of exchange, after re-indexing · Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the dates of the transaction. Foreign exchange gains and losses resulting from the settlement of such transactions as well as from the translation of monetary assets and liabilities not denominated in the functional currency of the subsidiary, are recognized in the consolidated income statement, except for qualifying cash flow hedges which are deferred in accumulated other comprehensive loss in shareholders’ equity. · Foreign exchange gains and losses arising from borrowings and related hedging instruments, cash and cash equivalents and intercompany loans that are not permanent in nature are presented in the consolidated income statement within “Finance costs, net”. · Foreign exchange gains and losses related to certain intercompany loans that are permanent in nature are included in accumulated other comprehensive loss. · All other foreign exchange gains and losses are presented in the consolidated income statement within “Operating expenses”. Accumulated foreign exchange gains and losses are recycled from accumulated other comprehensive loss to “Other operating gains (losses), net” or to discontinued operations, as applicable, within the consolidated income statement upon loss of control, significant influence or joint control of the applicable entity, including foreign exchange amounts relating to settled intercompany loans that had previously been considered permanent. Revenue recognition Revenues are recognized when control of the Company’s products or services are transferred to customers. The amount of revenues recognized reflects the consideration to which the Company expects to be entitled. Such consideration is net of estimated returns, discounts, value-added and other sales taxes. The Company derives its revenues from selling information, software and services. Revenues are generally recognized as follows: Recurring revenues Recurring revenues are generally recognized on a ratable basis over the contract term. Recurring revenues primarily consist of fees to access products or services delivered electronically over time, such as Westlaw and Checkpoint. These products are generally provided under subscription arrangements, which most customers renew at the end of each subscription term. Most subscription arrangements have multiple year terms that range from one to five years. Recurring revenues also include fees from software maintenance arrangements that are recognized over the maintenance period. Arrangements may be billed in advance or in arrears. Transactions revenues Transactions revenues are recognized primarily at a point in time and based on their type, as follows: · Volume-based fees related to online searches are recognized based on usage; · Fees from software licenses with no future obligations are recognized at the point of delivery; and · Professional fees from service and consulting arrangements are recognized as services are performed, generally based on hours incurred, reflecting the continuous transfer of control to the customer. Transactions revenues may be billed in advance or in arrears. Print revenues Print revenues that are sold under subscription agreements, which provide access to a library of print products as well as updates released during the subscription term, are generally recognized on a ratable basis over the contract term and may be billed in advance or in arrears. Revenues for print products that are not sold as part of a subscription arrangement are recognized at the point of shipment and billed at the same time. Print revenues consist of fees for content that is delivered primarily in traditional paper format. The Company also considers the following when recognizing revenues: Multiple performance obligations Certain customer contracts include multiple products and services, which are accounted for as separate performance obligations when they are distinct. A product or service is distinct if a customer can benefit from it either on its own or with other readily available resources, and the promise to transfer the good or service is separately identifiable in the contract. The transaction price is allocated to the separate performance obligations based on the relative standalone selling price. A series of distinct goods or services is accounted for as a single performance obligation if the items in the series are substantially the same, have the same pattern of transfer and: (1) each distinct item in the series represents a performance obligation that would be satisfied over time, and (2) the measure to satisfy the performance obligation for each distinct item in the series is the same. Certain arrangements include installation or implementation services. If these services are distinct, consideration is allocated to them and they are recognized as services are performed and included as transaction revenues. If the services are not distinct, they are recognized as part of the related subscription arrangement or as part of the related software license, as applicable. Sales involving third parties Revenues from sales of third-party content or services delivered on the Company’s platforms are recorded gross when the Company is a principal to the transaction, and net of costs when the Company is acting as an agent between the customer and the vendor. The Company considers several factors to determine whether it is acting as principal or an agent, most notably whether it is primarily responsible for (1) fulfilling the promise to provide the content or services, (2) setting the price, and (3) the credit risk for the amount billed to the customer. Deferred revenue Deferred revenue, a contract liability, is recorded when cash payments are received or due in advance of the transfer of the related products or services. Contract costs Incremental costs of obtaining a contract with a customer are recognized as an asset if the benefit of such costs is expected to be longer than one year, and amortized on a straight-line basis over the period that the product or service is transferred to the customer. Incremental costs include sales commissions to direct sales people as well as to account executives and sales management. Sales commissions on new customer contracts are generally paid at significantly higher rates than renewals. As such: · Assets related to new customer contracts are amortized over three years, which may anticipate renewal periods, as management estimates that this corresponds to the period over which a customer benefits from existing technology in the underlying product or service; and · Assets related to renewal of customer contracts are amortized over the term of the contract if they are commensurate with previous renewals commissions. The Company recognizes the following assets, “Deferred commissions” short-term, included within “Prepaid expenses and other current assets” and “Deferred commissions” long-term, included within “Other non-current The Company recognizes the incremental cost of obtaining a contract as an expense when incurred, if the amortization period is one year or less. Employee future benefits The net periodic pension expense of defined benefit pension plans and other post-employment benefits is actuarially determined on an annual basis using the projected unit credit method. The determination of benefit expense requires assumptions such as the discount rate, which is used to measure service cost, benefit plan obligations and the net interest income (expense) on the net benefit plan assets (obligations). Other significant assumptions include expected mortality, the expected rate of increase with respect to future compensation and pension payments as well as the expected healthcare cost trend rate. Actual results will differ from results which are estimated based on assumptions. Past service cost arising from plan amendments is recognized immediately in the consolidated income statement. The asset or liability recognized in the consolidated statement of financial position is the present value of the defined benefit obligation at the end of the reporting period less the fair value of plan assets. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity approximating the terms of the related pension liability. All actuarial gains and losses that arise in calculating the present value of the defined benefit obligation and the fair value of plan assets are recognized immediately in retained earnings and included in the consolidated statement of comprehensive income. For funded plans, surpluses are recognized only to the extent that the surplus is considered recoverable. Recoverability is primarily based on the extent to which the Company can unilaterally reduce future contributions to the plan. Payments to defined contribution plans are expensed as incurred, which is as the related employee service is rendered. Share-based compensation plans The Company operates equity-settled share-based compensation plans under which it receives services from employees as consideration for equity instruments of the Company. Share-based compensation expense is based on the grant date fair value of the awards expected to vest over the vesting period. The expense is recognized over the vesting period, which is the period over which the specified vesting conditions are satisfied. For awards with graded vesting, the fair value of each tranche is recognized over its respective vesting period. At the end of each reporting period, the Company re-assesses Termination benefits Termination benefits are generally payable when an employee is terminated before the normal retirement date or accepts voluntary redundancy. The associated charges are recognized when the Company can no longer withdraw the offer of termination benefits as follows: · Voluntary redundancy – recognized the earlier of when the employee accepts the offer and when the Company is restricted from withdrawing the offer; or · Involuntary termination – recognized when the Company has communicated to the affected employees a termination plan that is unlikely to change, describing (a) the type and amount of benefits, (b) the number, job classifications or functions and locations of employees to be terminated and (c) the plan’s expected completion date. Profit sharing and bonus plans Liabilities for profit sharing and bonuses are recognized based on a formula that takes into consideration various financial metrics after certain adjustments. The Company recognizes an accrual where contractually obliged or where there is a past practice that has created a constructive obligation to make such compensation payments. Cash and cash equivalents Cash and cash equivalents comprise cash on hand, demand deposits and investments with an original maturity at the date of purchase of three months or less. Trade receivables Trade receivables are amounts due from customers from providing services or the sale of goods in the ordinary course of business. Trade receivables are recognized initially at fair value and subsequently measured at amortized cost, less impairment. Trade receivables are classified as current assets if payment is due within one year or less. The Company maintains an allowance for doubtful accounts and sales adjustments to provide for impairment of trade receivables. The expense relating to doubtful accounts is included within “Operating expenses” in the consolidated income statement. Revenues are recorded net of sales adjustments. Property and equipment Property and equipment are recorded at cost and depreciated on a straight-line basis over their estimated useful lives as follows: Buildings and building improvements 10-40 years Computer equipment 3 years Furniture, fixtures and other equipment 5-7 Residual values and useful lives are reviewed at the end of each reporting period and adjusted if appropriate. Intangible assets Computer software Certain costs incurred in the development of software to be used internally or for providing services to customers are capitalized once a project has progressed beyond a conceptual, preliminary stage to that of application development. Development costs that are directly attributable to the design and testing of identifiable and unique software products controlled by the Company are recognized as intangible assets when the following criteria are met: · It is technically feasible to complete the software product so that it will be available for use; · Management intends to complete the software product and use or sell it; · There is an ability to use or sell the software product; · It can be demonstrated how the software product will generate probable future economic benefits; · Adequate technical, financial and other resources to complete the development and to use or sell the software product are available; and · The expenditure attributable to the software product during its development can be reliably measured. Costs that qualify for capitalization include both internal and external costs but are limited to those that are directly related to the specific project. The capitalized amounts, net of accumulated amortization, are included in “Computer software, net” in the consolidated statement of financial position. These costs are amortized over a three-year expected useful life. Amortization expense is included in “Amortization of computer software” in the consolidated income statement. Residual values and useful lives are reviewed at the end of each reporting period and adjusted if appropriate. Cloud computing arrangements In a cloud computing arrangement, the Company is granted a right to access software and other technology capabilities at a third-party provider through the internet. These arrangements typically do not allow the Company to acquire, take possession or control the underlying assets of the provider. Costs associated with cloud computing arrangements are generally expensed as incurred because they generally do not meet software capitalization criteria. The Company capitalizes costs to develop software that is hosted in the public cloud when: · It has the contractual right to take possession of the software from the cloud provider without significant penalty; and · It can demonstrate that it is feasible for the Company to run the software on its own hardware or that of another provider. The Company capitalizes costs to migrate software from on-premise Goodwill Goodwill represents the excess of the cost of an acquisition over the fair value of the Company’s share of the identifiable net assets of the acquired subsidiary or equity method investee at the date of acquisition. Goodwill is tested at least annually for impairment and carried at cost. Gains and losses on the disposal of an entity include an allocation of goodwill. Other identifiable intangible assets Upon acquisition, identifiable intangible assets are recorded at fair value and are carried at cost less accumulated amortization. Identifiable intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives as follows: Trade names 3-20 years Customer relationships 6-30 years Databases and content 5-30 Other 10-30 years Useful lives are reviewed at the end of each reporting period and adjusted if appropriate. Impairment When the recoverable amount of assets is less than their carrying amount, an impairment charge is recognized in the consolidated income statement. The recoverable amount is the higher of an asset’s fair value less costs of disposal or its value in use. Impairment losses, other than those relating to goodwill, are evaluated for potential reversals when events or changes in circumstances warrant such consideration. Intangible assets The carrying values of all intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable and at the end of each reporting period for indicators of impairment. Additionally, the carrying values of goodwill and identifiable intangible assets with indefinite lives are tested annually for impairment. For purposes of impairment testing: · Goodwill is allocated to cash-generating units (“CGUs”) or groups of CGUs based on the level at which management monitors it, which is not higher than an operating segment. Goodwill is allocated to those CGUs or groups of CGUs that are expected to benefit from the business combination in which the goodwill arose; and · Identifiable intangible assets with indefinite lives are allocated to the CGU with which they are associated, or compared to the excess fair value of all the CGUs if they are a corporate asset. Financial assets At the end of each reporting period, the Company assesses whether there is objective evidence that a financial asset is impaired. Non-financial The carrying value of a non-financial Disposal of long-lived assets and discontinued operations Long-lived assets are classified as held for sale if the carrying amount will be recovered principally through a sale transaction rather than through continued use and such sale is considered highly probable. The criteria for classification as held for sale include a firm decision by management or the board of directors to dispose of a business or a group of selected assets, an active marketing plan, and the expectation that such disposal will be completed within a 12-month · Represent a separate major line of business or geographical area of operations; · Are part of a single coordinated plan to dispose of a separate major line of business or geographical area of operations; or · Are a subsidiary acquired exclusively with a view to resale. Trade payables Trade payables are obligations to pay for goods or services that have been acquired in the ordinary course of business. Trade payables are initially recognized at fair value and subsequently measured at amortized cost using the effective interest method. Trade payables are classified as current liabilities if payment is due within one year or less. Provisions Provisions represent liabilities of the Company for which the amount or timing is uncertain. Provisions are recognized when the Company has a present legal or constructive obligation due to past events, it is probable that an outflow of resources will be required to settle the obligation, and the amount can be reliably estimated. Provisions are not recognized for future operating losses. Provisions are measured at the present value of the expected expenditures to settle the obligation using a discount rate that reflects current market assessments of the time value of money and the risks specific to the obligation. The increase in the provision due to passage of time is recognized as interest expense. Indebtedness Debt is recognized initially at fair value, net of transaction costs. Debt is subsequently stated at amortized cost with any difference between the proceeds (net of transactions costs) and the redemption value recognized in the consolidated income statement over the term of the debt using the effective interest method. Where a debt instrument is in a fair value hedging relationship, a fair value adjustment is made to its carrying value to reflect hedged risk. Interest on indebtedness is expensed as incurred unless capitalized for qualifying assets in accordance with IAS 23, Borrowing Costs Debt is classified as a current liability unless the Company has an unconditional right to defer settlement for at least 12 months after the end of the reporting period. Leases A contract is or contains a lease if it conveys the right to control the use of an identified asset for a specified period in exchange for consideration. When the Company leases assets from third parties, the Company is the lessee. When the Company leases assets to third parties, the Company is the lessor. Lessee At the lease commencement date, a right-of-use right-of-use The right-of-use non-current Right-of-use · The initial amount of the lease liability; · Lease payments made at or before the commencement date; and · Initial direct costs and expected restoration costs. Lease liabilities are measured as the present value of non-cancellable · Fixed payments (including in-substance · Variable lease payments that are based on an index or a rate (including inflation-linked payments); · Amounts expected to be payable by the lessee under residual value guarantees; · Exercise price of a purchase option if the lessee is reasonably certain to exercise that option; and · Penalty payments for terminating the lease, if the lease term reflects the lessee exercising that option. Where exercise of renewal or termination options is deemed reasonably certain, such assumptions are reflected in the valuation of the lease right-of-use re-assessed Lease payments are apportioned between the liability and a finance charge, which is reported within “Finance costs, net” in the consolidated income statement. The right-of-use Most of the Company’s leases are comprised of property leases, for which fixed payments covering lease and non-lease right-of-use Payments for leases with a term of 12 months or less and certain low-value Lessor Lessor arrangements are classified as finance leases when substantially all the risks and rewards of the underlying asset transfer to the lessee. A receivable, equal to the net investment in the lease, is recognized on the consolidated statement of financial position at the commencement date with an offset to the underlying asset. The receivable is measured as the present value of non-cancellable When the Company retains the risks and rewards of the underlying asset, the arrangement is classified as an operating lease. Payments received under operating leases are recognized as income on a straight-line basis over the lease term within “Operating expenses” in the consolidated income statement. The carrying value of the underlying asset is retained on the consolidated statement of financial position and amortized over the remaining term, determined as the shorter of the estimated useful life of the asset or the remaining lease term. Financial assets Purchases and sales of financial assets are recognized on the settlement date, which is the date on which the asset is delivered to or by the Company. Financial assets are derecognized when the rights to receive cash flows from the investments have expired or were transferred and the Company has transferred substantially all risks and rewards of ownership. Financial assets are classified in the following categories at the time of initial recognition based on the purpose for which the financial assets were acquired: Financial assets at fair value through the consolidated income statement · Classification Financial assets are classified at fair value through the consolidated income statement if acquired primarily for the purpose of selling in the short-term, such as financial assets held for trading, or if so designated by management. This category primarily includes money market accounts and warrants the Company held in Refinitiv. · Recognition and measurement Financial assets in this category are initially recognized, and subsequently carried, at fair value, with changes recognized in the consolidated income statement. Transaction costs are expensed. Financial assets at amortized cost – Cash, trade and other receivables · Classification Trade and other receivables are non-derivative non-current · Recognition and measurement Trade and other receivables are initially recognized at fair value plus transaction costs and subsequently measured at amortized cost using the effective interest method. Financial assets at fair value through other comprehensive income · Classification These financial assets are non-derivatives non-current held-for-trading · Recognition and measurement Investments are initially recognized at fair value plus transaction costs and are subsequently carried at fair value with changes recognized in other comprehensive income or loss. The amounts presented in accumulated other comprehensive income or loss are not subsequently recycled to the consolidated income statement. Offsetting financial instruments Financial assets and liabilities are offset and reported net in the consolidated statement of financial position when there is a legally enforceable right to offset the recognized amounts and there is an intention to settle on a net basis or to simultaneously realize the asset and settle the liability. Bank overdrafts in cash pooling arrangements may only be netted against cash and cash equivalents when settlement occurs on or about the end of the reporting period. Derivative financial instruments and hedging Derivatives are initially recognized at fair value on the date a contract is entered and are subsequently re-measured The Company documents at the inception of the transaction the relationship between hedging instruments and hedged items, a

Critical Accounting Estimates a

Critical Accounting Estimates and Judgments	12 Months Ended
	Dec. 31, 2020
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Critical Accounting Estimates and Judgments	Note 2: Critical Accounting Estimates and Judgments The preparation of financial statements requires management to make estimates and judgments about the future. Estimates and judgments are continually evaluated and are based on historical experience and other factors, including future events that are believed to be reasonable under the circumstances. Accounting estimates will, by definition, seldom equal the actual results. In March 2020, the World Health Organization characterized a novel strain of the coronavirus, known as COVID-19, COVID-19, COVID-19 The following discussion sets forth management’s: · Most critical estimates and assumptions in determining the value of assets and liabilities; and · Most critical judgments in applying accounting policies. Critical accounting estimates and assumptions Allowance for doubtful accounts and sales adjustments The Company must assess whether accounts receivable are collectible from customers. Accordingly, management establishes an allowance for estimated losses arising from non-payment pre-tax Computer software Computer software represented $0.8 billion of total assets in the consolidated statement of financial position at December 31, 2020. A significant portion of ongoing expenditures relate to software that is developed as part of electronic databases, delivery systems and internal infrastructures, and, to a lesser extent, software licensed directly to customers. As part of the software development process, management must estimate the expected period of benefit over which capitalized costs should be amortized. The basis of these estimates includes the timing of technological obsolescence, economic and competitive pressures, historical experience and internal business plans for the use of the software. Due to rapidly changing technology and the uncertainty of the software development process itself, future results could be affected if management’s current assessment of its software projects differs from actual performance. Other identifiable intangible assets and goodwill Other identifiable intangible assets and goodwill represented $3.4 billion and $6.0 billion, respectively, of total assets in the consolidated statement of financial position at December 31, 2020. Other identifiable intangible assets and goodwill arise out of business combinations. Business combinations are accounted for under the acquisition method of accounting, which requires the Company to identify and attribute values to the intangible assets acquired based on their estimated fair value as well as to estimate their useful lives. These determinations involve significant estimates and assumptions regarding cash flow projections, economic risk and weighted-average cost of capital. The excess of acquisition cost over the fair value of identifiable net assets acquired is recorded as goodwill. Subsequent to acquisition, the Company tests other identifiable intangible assets and goodwill for impairment as required. The outcome of these tests is highly dependent on management’s latest estimates and assumptions regarding cash flow projections, economic risk and weighted-average cost of capital. Specifically, cash flow projections could be impacted by deterioration in macroeconomic conditions, including potential impacts of regulation on customers, changes in customer buying patterns or competitive pressures. The Company’s assumption of perpetual growth could be impacted by changes in long-term outlooks for global inflation. Additionally, the discount rate, tax rate and revenue or EBITDA multiples used in various impairment tests are based on those for comparable companies, which are driven by market conditions and prevailing tax laws. If future events or results differ adversely from the estimates and assumptions made at acquisition or as part of subsequent impairment tests, the Company could record increased amortization or impairment charges in the future. See note 18 for discussion of the annual impairment testing of goodwill. Equity Method Investments and Related Warrants Equity method investments represented $1.1 billion of total assets in the consolidated statement of financial position at December 31, 2020, and consisted primarily of the Company’s former 45% investment in Refinitiv. The carrying amount of equity method investees is assessed for impairment whenever events or changes in circumstances indicate that its carrying value may not be recoverable and at the end of each reporting period for indicators of impairment. Additionally, the terms of the Company’s former investment in Refinitiv included warrants that provided for the exchange of value between private equity funds affiliated with Blackstone and the Company at the time of an initial public offering (“IPO”) or change in control of Refinitiv, depending on the value of Refinitiv at that date. These warrants were a derivative instrument that were accounted for at fair value each reporting period. On August 1, 2019, the Company and private equity funds affiliated with Blackstone agreed to sell Refinitiv to London Stock Exchange Group (“LSEG”) (see note 8), for a value that was substantially in excess of the carrying value of the Company’s investment. On January 29, 2021, the sale of Refinitiv to LSEG was completed (see note 32), however this event was not considered an adjusting subsequent event for purposes of valuing the warrants at December 31, 2020. The value of the warrants at December 31, 2020 reflected the entry into a definitive agreement for the sale of the Refinitiv business on August 1, 2019. As such, the value at each date was primarily based on the number of incremental shares in Refinitiv to which the Company was contractually entitled upon closing and the share price of LSEG on December 31, 2020. The valuation also incorporated (on a weighted-average basis) other outcomes based on the likelihood of the transaction closing using a Monte Carlo simulation approach, which required key inputs such as the estimated equity value of Refinitiv; the capitalization structure of Refinitiv; the expected volatility; the risk-free rate of return; annual dividends or distributions; and assumptions about the timing of a liquidity event. The Company held other equity investments at December 31, 2020 aggregating $0.2 billion in a variety of industries, including real estate, technology and media, which could become impaired in the future due to the uncertainty of economic conditions. Employee future benefits The Company sponsors defined benefit plans providing pension and other post-employment benefits to covered employees. The determination of benefit expense associated with employee future benefits requires assumptions such as the discount rate, which is used to measure service cost, benefit plan obligations and the net interest income (expense) on the net benefit plan assets (obligations). Other significant assumptions include expected mortality, the expected rate of increase with respect to future compensation and pension payments as well as the expected healthcare cost trend rate. Because the determination of the cost and obligations associated with employee future benefits requires the use of various assumptions, there is measurement uncertainty inherent in the actuarial valuation process. Actual results will differ from results which are estimated based on assumptions. In December 2020, the Company amended its most significant defined benefit plan such that employees will stop accruing benefits on January 1, 2023. This amendment will eliminate the need for management to make assumptions about future compensation after that date. See note 26 for further details about the impact of this amendment on the consolidated financial statements. Income taxes The Company computes an income tax provision in each of the jurisdictions in which it operates. These income tax provisions include amounts that are based upon the Company’s estimates and assumptions regarding prices and values used to record intercompany transactions. Actual amounts of income tax expense only become final upon filing and acceptance of the tax return by the relevant authorities, which occurs subsequent to the issuance of the financial statements. Additionally, estimation of income taxes includes evaluating the recoverability of deferred tax assets based on an assessment of the ability to use the underlying future tax deductions before they expire against future taxable income. The assessment is based upon existing tax laws and estimates of future taxable income. To the extent estimates differ from the final tax return, earnings would be affected in a subsequent period. In interim periods, the income tax provision is based on estimates of full-year earnings by jurisdiction. The average annual effective income tax rates are re-estimated The Company has deferred tax assets in connection with the intercompany transfer of certain operations. The determination of these assets requires management to make significant estimates and assumptions about the fair value of the related operations. Critical estimates include, but are not limited to, internal revenue and expense forecasts and discount rates, while critical assumptions include those regarding macroeconomic conditions and prevailing tax laws. The discount rates used in the income method to reduce expected future cash flows to present value are derived from a weighted-average cost of capital analysis and are adjusted to reflect the inherent risks related to the cash flow. Although the Company believes its assumptions and estimates are reasonable and appropriate, they are based in part on historical experience and are inherently uncertain. Unanticipated events and circumstances may occur that could differ adversely from the Company’s assumptions and estimates, which could require the Company to reduce its deferred tax assets in future periods. Critical judgments in applying accounting policies Revenue recognition To determine the appropriate revenue recognition for its products and services, management must assess whether multiple products and services in customer contracts are distinct performance obligations that should be accounted for separately, or whether they must be accounted for together. In making the determination, management considers, for example, whether the Company regularly sells a good or service separately, or whether the goods or services are highly interrelated. Management must also determine the standalone selling price (SSP) for each distinct performance obligation. The Company typically has more than one SSP for individual products and services due to the stratification of its offerings by customer. As a result, management determines the SSP taking into consideration market conditions and other factors, including the value of its contracts, the product or service sold, the customer’s market, geographic location, and the number and types of users in each contract. Finally, management must also estimate the period over which to amortize assets arising from incremental costs of obtaining a contract. As management estimates that this period corresponds to the period over which a customer benefits from existing technology in the underlying product or service, this judgment is closely linked with the determination of software amortization periods. Uncertain tax positions The Company is subject to taxation in numerous jurisdictions and is routinely under audit by many different taxing authorities in the ordinary course of business. There are many transactions and calculations during the course of business for which the ultimate tax determination is uncertain, as taxing authorities may challenge some of the Company’s positions and propose adjustments or changes to its tax filings. As a result, the Company maintains provisions for uncertain tax positions that it believes appropriately reflect its risk. These provisions are made using the Company’s best estimates of the amount expected to be paid based on a qualitative assessment of all relevant factors. When appropriate, the Company performs an expected value calculation to determine its provisions. The Company reviews the adequacy of these provisions at the end of each reporting period and adjusts them based on changing facts and circumstances. Due to the uncertainty associated with tax audits, it is possible that at some future date, liabilities resulting from such audits or related litigation could vary significantly from the Company’s provisions. Where the outcome of these tax-related Unrecognized Deferred Tax Assets Deferred tax assets are recognized to the extent it is probable that taxable profits will be available against which the deductible temporary differences can be utilized, and are reduced to the extent that it is not probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered. In evaluating deferred tax assets, management must make judgments to assess the future taxable profits and likely outcomes of unresolved tax audits associated with the relevant jurisdictions. As of December 31, 2020, the Company recorded deferred tax assets of $1,801 million and disclosed unrecognized deferred tax assets of $1,188 million (see note 23).

Revenues

Revenues	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Revenues	Note 3: Revenues Revenues by type and geography The following tables disaggregate revenues by type and geography and reconciles them to reportable segments (see note 4). Revenues by type Legal Corporates Tax & Reuters News Global Print Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 Recurring 2,367 2,249 1,143 1,079 682 703 566 573 - - 4,758 4,604 Transactions 168 184 224 229 154 140 62 57 - - 608 610 Global Print - - - - - - - - 620 693 620 693 Eliminations/Rounding - - - - - - - - - - (2) (1) Total 2,535 2,433 1,367 1,308 836 843 628 630 620 693 5,984 5,906 Revenues by geography (country of destination) Legal Corporates Tax & Reuters News Global Print Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 U.S. 2,027 1,991 1,129 1,062 704 704 418 419 436 482 4,714 4,658 Canada (country of domicile) 51 41 10 11 27 26 4 3 81 91 173 172 Other 19 25 45 60 76 82 9 9 17 22 166 198 Americas (North America, Latin America, South America) 2,097 2,057 1,184 1,133 807 812 431 431 534 595 5,053 5,028 U.K. 249 213 109 105 15 17 35 29 41 45 449 409 Other 60 59 41 37 2 1 105 111 15 18 223 226 EMEA (Europe, Middle East and Africa) 309 272 150 142 17 18 140 140 56 63 672 635 Asia Pacific 129 104 33 33 12 13 57 59 30 35 261 244 Eliminations/Rounding - - - - - - - - - - (2) (1) Total 2,535 2,433 1,367 1,308 836 843 628 630 620 693 5,984 5,906 Contract liabilities December 31, 2020 2019 2018 Deferred revenue 866 833 815 Deferred revenue at December 31, 2020 increased compared to the balance at December 31, 2019 primarily due to cash payments received or due in advance of satisfying performance obligations, offset by $786 million of revenues recognized that were included in the deferred revenue balance at the beginning of the period. Deferred revenue at December 31, 2019 increased compared to the balance at December 31, 2018 primarily driven by cash payments received or due in advance of satisfying performance obligations, offset by $796 million of revenues recognized that were included in the deferred revenue balance at the beginning of the period. Costs to obtain a contract Amortization of deferred commissions was $128 million and $120 million for the years ending December 31, 2020 and 2019, respectively, and was recorded within ”Operating expenses” in the consolidated income statement. Remaining performance obligations As of December 31, 2020, remaining performance obligations were $16.0 billion (2019 - $16.1 billion), including the portion recorded as deferred revenue. The Company expects to recognize these revenues as follows: December 31, 2020 2019 1 year 25% 24% Between 1 and 2 years 13% 13% Between 2 and 3 years 8% 7% Later than 3 years 54% 56% The remaining performance obligations later than three years largely relate to an agreement under which the Reuters News business supplies news and editorial content to Refinitiv for a minimum amount of revenue through October 1, 2048. In 2020 and 2019, the Company recorded $336 million of revenues under this agreement, which represent the current minimum annual value. However, these revenues may increase further as the contract requires adjustments related to changes in the consumer price index and foreign exchange rates (see note 31). As permitted by IFRS 15, Revenue from Contracts with Customers

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2020
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Segment Information	Note 4: Segment Information The Company is organized as five reportable segments, reflecting how the businesses are managed. The accounting policies applied by the segments are the same as those applied by the Company. The segments offer products and services to target customers as described below. Legal Professionals The Legal Professionals segment serves law firms and governments with research and workflow products, focusing on intuitive legal research powered by emerging technologies and integrated legal workflow solutions that combine content, tools and analytics. Corporates The Corporates segment serves corporate customers from small businesses to multinational organizations, including the seven largest global accounting firms, with the Company’s full suite of content-enabled technology solutions for in-house legal, tax, regulatory, compliance and IT professionals. Tax & Accounting Professionals The Tax & Accounting Professionals segment serves tax, accounting and audit professionals in accounting firms (other than the seven largest, which are served by the Corporates segment) with research and workflow products, focusing on intuitive tax offerings and automating tax workflows. Reuters News The Reuters News segment supplies business, financial, national and international news to professionals via desktop terminals, including through Refinitiv, the world’s media organizations, industry events and directly to consumers. Global Print The Global Print segment provides legal and tax information primarily in print format to customers around the world. The Company also reports “Corporate costs”, which includes expenses for corporate functions and does not qualify as a reportable segment. Year ended December 31, 2020 2019 Revenues Legal Professionals 2,535 2,433 Corporates 1,367 1,308 Tax & Accounting Professionals 836 843 Reuters News 628 630 Global Print 620 693 Eliminations/Rounding (2) (1) Consolidated revenues 5,984 5,906 Adjusted EBITDA Legal Professionals 1,001 895 Corporates 460 412 Tax & Accounting Professionals 330 318 Reuters News 73 68 Global Print 242 294 Corporate costs (131) (494) Adjusted EBITDA 1,975 1,493 Fair value adjustments (see note 5) 10 - Depreciation (184) (154) Amortization of computer software (485) (449) Amortization of other identifiable intangible assets (123) (114) Other operating gains, net 736 423 Consolidated operating profit 1,929 1,199 Net interest expense (195) (163) Other finance income (costs) 30 (65) Share of post-tax losses in equity method investments (544) (599) Tax (expense) benefit (71) 1,198 Earnings from continuing operations 1,149 1,570 Additions to Capital Assets (1) December 31, 2020 2019 Legal Professionals 382 679 Corporates 119 127 Tax & Accounting Professionals 100 524 Reuters News 28 228 Global Print 22 5 Reportable segments 651 1,563 Corporate assets 52 245 Total 703 1,808 (1) Capital assets include property and equipment, computer software and other identifiable intangible assets. Geographic Information Non-Current Assets (1) December 31, 2020 2019 U.S. 7,209 7,549 Canada (country of domicile) 1,034 1,035 Other 191 233 Americas (North America, Latin America, South America) 8,434 8,817 U.K. 1,544 1,612 Other 1,930 1,983 EMEA (Europe, Middle East and Africa) 3,474 3,595 Asia Pacific 126 133 Total 12,034 12,545 (1) Non-current In accordance with IFRS 8, Operating Segments Adjusted EBITDA · Segment adjusted EBITDA represents earnings from continuing operations before tax expense or benefit, net interest expense, other finance costs or income, depreciation, amortization of software and other identifiable intangible assets, the Company’s share of post-tax · The Company does not consider these excluded items to be controllable operating activities for purposes of assessing the current performance of the reportable segments. · Each segment includes an allocation of costs, based on usage or other applicable measures, for centralized support services such as technology, customer service, commercial policy, facilities management, and product and content development. Additionally, product costs are allocated when one segment sells products managed by another segment. · Consolidated adjusted EBITDA is comprised of adjusted EBITDA from reportable segments and Corporate costs. Revenues by Classes of Similar Products or Services The following table sets forth revenues by major type: Year ended December 31, 2020 2019 Electronic, software & services 5,364 5,213 Global Print 620 693 Total 5,984 5,906

Operating Expenses

Operating Expenses	12 Months Ended
	Dec. 31, 2020
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Operating Expenses	Note 5: Operating Expenses The components of operating expenses include the following: Year ended December 31, 2020 2019 Salaries, commissions and allowances (1) 2,269 2,431 Share-based payments 64 56 Post-employment benefits 135 130 Total staff costs 2,468 2,617 Goods and services (2) 1,158 1,411 Content 274 265 Telecommunications 54 48 Facilities 55 72 Fair value adjustments (3) (10) - Total operating expenses 3,999 4,413 (1) The 2019 period included $117 million of restructuring charges. See note 22. (2) Goods and services include professional fees, consulting and outsourcing services, contractors, selling and marketing, and other general and administrative costs. (3) Fair value adjustments primarily represent gains or losses due to changes in foreign currency exchange rates on intercompany balances that arise in the ordinary course of business.

Other Operating Gains, Net

Other Operating Gains, Net	12 Months Ended
	Dec. 31, 2020
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Other Operating Gains, Net	Note 6: Other Operating Gains, Net Other operating gains, net, were $736 million and $423 million for the year ended December 31, 2020 and 2019, respectively. In 2020, other operating gains, net, included a gain of $472 million related to the sale of an equity method investment and a $119 million gain from an amendment to the Company’s U.S. pension plan (see note 26). Both periods included a benefit from the revaluation of warrants that the Company held in Refinitiv, prior to its sale to LSEG in January 2021 (see note 32), due to an increase in the share price of LSEG. In 2020, other

Finance Costs, Net

Finance Costs, Net	12 Months Ended
	Dec. 31, 2020
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Finance Costs, Net	Note 7: Finance Costs, Net The components of finance costs, net, include interest expense (income) and other finance costs (income) as follows: Year ended December 31, 2020 2019 Interest expense: Debt 156 155 Derivative financial instruments - hedging activities (1) 2 Other, net 14 18 Fair value gains on cash flow hedges, transfer from equity (see note 19) (97) (21) Net foreign exchange losses on debt 97 21 Net interest expense - debt and other 169 175 Net interest expense - leases 10 7 Net interest expense - pension and other post-employment benefit plans 21 25 Interest income (5) (44) Net interest expense 195 163 Year ended December 31, 2020 2019 Net (gains) losses due to changes in foreign currency exchange rates (9) 37 Net (gains) losses on derivative instruments (21) 7 Losses from redemption of debt securities - 19 Other - 2 Other finance (income) costs (30) 65 Net (gains) losses due to changes in foreign currency exchange rates Net (gains) losses due to changes in foreign currency exchange rates were principally comprised of amounts related to certain intercompany funding arrangements. Net (gains) losses on derivative instruments Net (gains) losses on derivative instruments were principally comprised of amounts relating to foreign exchange contracts and the ineffective portion of cash flow hedges (see note 19). Losses from redemption of debt securities Losses from redemption of debt securities primarily represent premiums incurred for early extinguishment of debt securities (see note 19).

Equity Method Investments

Equity Method Investments	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Equity Method Investments	Note 8: Equity Method Investments Equity method investments are primarily comprised of the Company’s former 45% investment in Refinitiv, a provider of market and financial data and analytics, with trading venues across asset classes. Private equity funds affiliated with Blackstone owned the remaining 55%. As the Company had significant influence in the financial and operating policy decisions of Refinitiv, the investment was accounted for under the equity method. Refinitiv Holdings Ltd. is an exempted company incorporated with limited liability under the laws of the Cayman Islands with corporate offices in New York and London. In accordance with its debt covenants, Refinitiv is limited in its ability to pay dividends to its investors, subject to certain exceptions. The Company’s share of post-tax Year ended December 31, 2020 2019 Refinitiv (45% ownership interest) (554) (609) Other equity method investments 10 10 Total share of post-tax losses in equity method investments (544) (599) The composition of equity method investments as reported in the consolidated statement of financial position is comprised of the following: December 31, 2020 2019 Refinitiv (45% ownership interest) 981 1,387 Other equity method investments 155 164 Total equity method investments 1,136 1,551 Set forth below is summarized financial information for 100% of Refinitiv, and a reconciliation to the Company’s carrying value of its investment. Year ended December 31, 2020 2019 Revenues 6,513 6,250 Net loss (1,137) (1,278) Remove: Net earnings attributable to non-controlling interests (95) (75) Net loss attributable to Refinitiv (1,232) (1,353) Other comprehensive income (loss) attributable to Refinitiv 330 (78) Total comprehensive loss attributable to Refinitiv (902) (1,431) December 31, 2020 2019 Assets Current assets 2,071 2,031 Non-current assets 21,094 20,709 Total assets 23,165 22,740 Liabilities Current liabilities 3,995 3,398 Non-current liabilities 14,268 13,964 Total liabilities 18,263 17,362 Net assets 4,902 5,378 Non-controlling interests (2,415) (2,100) Other (1) (306) (195) Net assets attributable to Refinitiv 2,181 3,083 Net assets attributable to Refinitiv - beginning period 3,083 4,514 Net loss attributable to Refinitiv (1,232) (1,353) Other comprehensive income (loss) attributable to Refinitiv 330 (78) Net assets attributable to Refinitiv - ending period 2,181 3,083 Thomson Reuters % share 45% 45% Thomson Reuters carrying amount 981 1,387 (1) Consists primarily of equity transactions excluded from Thomson Reuters 45% share of total comprehensive loss. Refer to note 31 for related party transactions with Refinitiv. On January 29, 2021, the Company and private equity funds affiliated with Blackstone sold Refinitiv to LSEG (see note 32). The terms of the Company’s investment in Refinitiv included warrants that provided for an exchange of value between private equity funds affiliated with Blackstone and the Company at the time of a change in control of Refinitiv, depending on the value of Refinitiv. As a result of the LSEG transaction, the exercise of the warrants in connection with the closing of the transaction entitled the Company to receive an additional 4.5 million shares of Refinitiv. These warrants were a derivative instrument, recorded within “Other financial assets – current” in the consolidated statement of financial position and accounted for at fair value each reporting period. Changes in value were recorded within “O ther o

Taxation

Taxation	12 Months Ended
	Dec. 31, 2020
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Taxation	Note 9: Taxation The components of tax expense (benefit) for 2020 and 2019 are as follows: Year ended December 31, 2020 2019 Current tax expense 302 197 Deferred tax benefit (231) (1,395) Total tax expense (benefit) 71 (1,198) Taxes on items recognized in “Other comprehensive income (loss)” or directly in equity in 2020 and 2019 are as follows: Year ended December 31, 2020 2019 Deferred tax expense (benefit) on actuarial gains (losses) on defined benefit plans 17 (12) Deferred tax expense (benefit) on share of other comprehensive income (loss) in equity method investments - may be subsequently reclassified to net earnings 35 (7) Deferred tax expense (benefit) on share of other comprehensive income (loss) in equity method investments - will not be reclassified to net earnings 1 (2) Deferred tax benefit on share-based payments (3) (8) Current tax benefit on share-based payments (11) (20) Items affecting tax expense for 2020 and 2019 In the year ended December 31, 2020, the Company recorded $138 million of tax benefits to recognize deferred tax assets that arose in prior years in various subsidiaries outside the U.S. The deferred tax assets recognized were almost entirely related to tax losses and other tax attributes in subsidiaries that have experienced improved profitability within the past year and have projected future taxable profits sufficient to utilize these deferred tax assets. These tax losses and other tax attributes can be carried forward indefinitely. In December 2019, the Company reorganized the operations of certain foreign affiliates that were subject to different tax rates, which resulted in an increase in the tax basis of the reorganized business to the acquiror and a related tax benefit of $1.2 billion. The Company recognized a $1.2 billion deferred tax asset, which it expects to realize in subsequent periods, based on the historical and expected future profitability of the reorganized business. Below is a reconciliation of income taxes calculated at the Canadian corporate tax rate of 26.5% to the tax expense (benefit) for 2020 and 2019: Year ended December 31, 2020 2019 Income before tax 1,220 372 Income before tax multiplied by the standard rate of Canadian corporate tax of 26.5% 323 99 Effects of: Income taxes recorded at rates different from the Canadian tax rate (167) (159) Tax losses for which no benefit is recognized 1 1 Reorganization of certain foreign affiliate operations - (1,197) Net non-deductible foreign exchange and other losses 6 42 Impact of disposals of businesses - (66) Tax on reversal of statutory intercompany investment impairments (1) 905 - Recognition of tax losses that arose in prior years due to statutory intercompany investment impairments (1) (905) - Provision for uncertain tax provisions 10 (46) Derecognition of tax losses that arose in prior years - 88 Recognition of tax losses that arose in prior years (138) (29) U.S. base erosion minimum tax 43 7 Impact of tax law changes - 52 Research and development credits (12) (6) Other adjustments related to prior years (6) 3 Withholding taxes 6 3 Other differences 5 10 Total tax expense (benefit) 71 (1,198) (1) In 2020, a non-U.S. The Company’s 2020 effective income tax rate on earnings from continuing operations was 5.8%. In 2019, the effective income tax rate on earnings from continuing operations was not meaningful due to the impact of the $1.2 billion tax benefit discussed above. A 1% increase in the effective income tax rate would have increased 2020 income tax expense and decreased earnings from continuing operations by approximately $12 million.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Discontinued Operations	Note 10: Discontinued Operations Loss from discontinued operations, net of tax, was $27 million and $6 million for the years ended December 31, 2020 and December 31, 2019, respectively. The results of discontinued operations included residual expenses related to liabilities associated with businesses that were previously classified as discontinued operations. In both years, the expenses were partially offset by tax benefits of $15 million in 2020 and $31 million in 2019 related to the reversal of tax reserves no longer required due to changes in tax laws and the expiration of statutes of limitation.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Basic and diluted earnings per share [abstract]
Earnings Per Share	Note 11: Earnings Per Share Basic earnings per share was calculated by dividing earnings attributable to common shareholders less dividends declared on preference shares by the sum of the weighted-average number of common shares outstanding and vested deferred share units (“DSUs”) outstanding during the period. DSUs represent common shares that certain employees have elected to receive in the future upon vesting of share-based compensation awards or in lieu of cash compensation. Diluted earnings per share was calculated using the denominator of the basic calculation described above adjusted to include the potentially dilutive effect of outstanding stock options and time-based restricted share units (“TRSUs”). Earnings used in determining consolidated earnings per share and earnings per share from continuing operations are as follows: Year ended December 31, 2020 2019 Earnings attributable to common shareholders 1,122 1,564 Less: Dividends declared on preference shares (2) (3) Earnings used in consolidated earnings per share 1,120 1,561 Less: Loss from discontinued operations, net of tax 27 6 Earnings used in earnings per share from continuing operations 1,147 1,567 The weighted-average number of common shares outstanding, as well as a reconciliation of the weighted-average number of common shares outstanding used in the basic earnings per share computation to the weighted-average number of common shares outstanding used in the diluted earnings per share computation, is presented below: Year ended December 31, 2020 2019 Weighted-average number of common shares outstanding 496,343,778 500,395,573 Weighted-average number of vested DSUs 378,514 434,180 Basic 496,722,292 500,829,753 Effect of stock options and TRSUs 1,309,714 1,691,447 Diluted 498,032,006 502,521,200 There were 557,056 and nil share-based compensation awards outstanding at December 31, 2020 and 2019, respectively, where the exercise price was greater than the average market price. Accordingly, these awards were anti-dilutive, and therefore excluded from the diluted earnings per share computation.

Cash and Cash Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Cash and Cash Equivalents	Note 12: Cash and Cash Equivalents December 31, 2020 2019 Cash Cash at bank and on hand 311 335 Cash equivalents Money market accounts 1,476 490 Cash and cash equivalents 1,787 825 Of total cash and cash equivalents, $43 million and $34 million at December 31, 2020 and 2019, respectively, were held in subsidiaries which have regulatory restrictions and were therefore not available for general use by the Company.

Trade and Other Receivables

Trade and Other Receivables	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Trade and Other Receivables	Note 13: Trade and Other Receivables December 31, 2020 2019 Trade receivables 1,195 1,184 Less: allowance for doubtful accounts (37) (30) Less: allowance for sales adjustments (36) (34) Net trade receivables 1,122 1,120 Other receivables (1) 29 47 Trade and other receivables 1,151 1,167 (1) At December 31, 2020 and 2019, includes $11 million and $27 million, respectively, due from Refinitiv. There are no expected credit losses associated with this receivable. See note 31. The aging of gross trade receivables at each reporting date was as follows: December 31, 2020 2019 Current 751 806 Past due 1-30 days 195 185 Past due 31-60 days 72 63 Past due 61-90 days 42 36 Past due >91 days 135 94 Balance at December 31 1,195 1,184 Allowance for doubtful accounts The change in the allowance for doubtful accounts was as follows: December 31, 2020 2019 Balance at beginning of year 30 30 Charges 51 29 Write-offs (44) (28) Disposals of businesses - (1) Balance at end of year 37 30 The Company is exposed to normal credit risk with respect to its accounts receivable and maintains provisions for credit losses. The potential for such losses is mitigated because customer creditworthiness is evaluated before credit is extended and there is no significant exposure to any single customer. The Company estimates credit losses for trade receivables by aggregating similar customer types together, because they tend to share similar credit risk characteristics, taking into consideration the number of days the receivable is past due. Provision rates for the allowance for doubtful accounts are based on historical credit loss experience and calibrated, based on management’s judgment, with forward looking information about a debtor’s ability to pay, including estimates related to the global economic crisis caused by the COVID-19

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Prepaid Expenses and Other Current Assets	Note 14: Prepaid Expenses and Other Current Assets December 31, 2020 2019 Inventory 26 23 Prepaid expenses 126 130 Current tax receivables (1) 65 72 Deferred commissions 127 117 Other current assets 81 204 Prepaid expenses and other current assets 425 546 (1) Both periods include $9 million of uncertain tax positions, which reduced total current tax receivables.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Property and Equiptment	Note 15: Property and Equipment Property and equipment consist of the following: Land, Buildings and Building Improvements Computer Equipment Furniture, Fixtures and Other Equipment Total Cost: December 31, 2018 757 774 295 1,826 Impact of IFRS 16 adoption 126 - 2 128 Additions: Capital expenditures 46 46 16 108 Leases 143 41 - 184 Acquisitions 1 3 3 7 Removed from service (3) (130) (5) (138) Disposals of businesses (168) (13) (1) (182) Translation and other, net (4) 31 2 29 December 31, 2019 898 752 312 1,962 Additions: Capital expenditures 19 24 23 66 Leases 21 32 2 55 Removed from service (19) (12) (3) (34) Disposals of businesses (10) - (6) (16) Translation and other, net 5 (4) (32) (31) December 31, 2020 914 792 296 2,002 Accumulated depreciation: December 31, 2018 (441) (687) (225) (1,353) Current year depreciation (84) (54) (16) (154) Removed from service 3 130 5 138 Disposals of businesses 38 10 1 49 Translation and other, net 3 (33) 3 (27) December 31, 2019 (481) (634) (232) (1,347) Current year depreciation (105) (64) (15) (184) Removed from service 19 12 3 34 Disposals of businesses 7 - 4 11 Translation and other, net 15 2 12 29 December 31, 2020 (545) (684) (228) (1,457) Carrying amount: December 31, 2019 417 118 80 615 December 31, 2020 369 108 68 545 Fully depreciated assets are retained in cost and accumulated depreciation accounts until such assets are removed from service. Proceeds from disposals of property and equipment are netted against the related assets and the accumulated depreciation and included within “Operating profit” in the consolidated income statement. See note 27 for right-of-use

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2020
Computer software [member]
Statement [LineItems]
Intangible Assets	Note 16: Computer Software Computer software consists of the following: 2020 2019 Cost: Balance at January 1, 4,464 4,183 Additions: Internally developed 397 388 Purchased 4 15 Acquisitions 25 82 Removed from service (57) (66) Disposals of businesses (60) (144) Translation and other, net (2) 6 Balance at December 31, 4,771 4,464 Accumulated amortization: Balance at January 1, (3,564) (3,275) Current year amortization (485) (449) Removed from service 57 66 Disposals of businesses 49 94 Translation and other, net 2 - Balance at December 31, (3,941) (3,564) Carrying amount at December 31: 830 900 Fully amortized assets are retained in cost and accumulated amortization accounts until such assets are removed from service. Proceeds from disposals of computer software are netted against the related assets and the accumulated amortization and included within “Operating profit” in the consolidated income statement.
Other identifiable intangible assets [member]
Statement [LineItems]
Intangible Assets	Note 17: Other Identifiable Intangible Assets Indefinite Finite Useful Life Trade Names Trade Names Customer Databases and Other Total Cost: December 31, 2018 2,646 153 1,595 669 741 5,804 Acquisitions - 40 268 1 - 309 Disposals of businesses - (28) (72) (18) - (118) Translation and other, net - 1 19 (13) 5 12 December 31, 2019 2,646 166 1,810 639 746 6,007 Acquisitions - 2 21 - - 23 Removed from service - (18) - - (12) (30) Translation and other, net - (3) 13 1 9 20 December 31, 2020 2,646 147 1,844 640 743 6,020 Accumulated amortization: December 31, 2018 - (146) (1,122) (514) (698) (2,480) Current year amortization - (5) (66) (22) (21) (114) Disposals of businesses - 28 72 18 - 118 Translation and other, net - - (9) (2) (2) (13) December 31, 2019 - (123) (1,125) (520) (721) (2,489) Current year amortization - (10) (81) (21) (11) (123) Removed from service - 18 - - 12 30 Translation and other, net - (2) 2 (1) (10) (11) December 31, 2020 - (117) (1,204) (542) (730) (2,593) Carrying amount: December 31, 2019 2,646 43 685 119 25 3,518 December 31, 2020 2,646 30 640 98 13 3,427 The carrying amount of the indefinite-lived trade names is comprised of the following: · Reuters trade name of $1,939 million at December 31, 2020 and 2019; and · West trade name of $707 million at December 31, 2020 and 2019. Due to widespread brand recognition, long history and expected future use, these trade names have been assigned indefinite lives. For purposes of impairment testing, the West trade name was allocated to the Legal Professionals, Corporates and Global Print CGUs as it primarily benefits those CGUs. The Reuters trade name is considered a corporate asset, because it is used in the Company’s name, and therefore its carrying value was compared to the combined excess fair value of all the Company’s CGUs. The Company performed its annual test for impairment as of October 1, 2020. No impairment was recorded. See note 18.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Goodwill	Note 18: Goodwill The following table presents goodwill for the years ended December 31, 2020 and 2019: 2020 2019 Cost: Balance at January 1, 5,853 5,076 Acquisitions 133 715 Disposals of businesses - (18) Translation and other, net (10) 80 Carrying amount at December 31: 5,976 5,853 Impairment test of goodwill The Company performed its annual goodwill impairment test as of October 1, 2020. No goodwill impairment was recorded as the estimated fair value less costs of disposal of each CGU exceeded their carrying values by more than 100%. The Company performed the test for each group of CGUs to which goodwill was allocated and monitored by management at the date of the test. The following table shows the carrying amount of goodwill that was tested for impairment by CGU: Cash-Generating Unit 2020 Legal Professionals 3,353 Corporates 1,294 Tax & Accounting Professionals 869 Reuters News 137 Global Print 248 In the 2019 impairment test, the fair value less costs of disposal for each CGU exceeded their respective carrying values by over 100%. As allowed under IAS 36, Impairment of Assets re-estimate Valuation Techniques The selection and application of valuation techniques and the determination of significant assumptions requires judgment. As with previous impairment tests, the recoverable value of each CGU was based on fair value less costs of disposal, using a weighted average of the income approach and market approach. IFRS 13, Fair Value Measurement Income approach The income approach is predicated upon the value of the future cash flows that a business will generate. The Company used the discounted cash flow (“DCF”) method, which involves projecting cash flows and converting them into a present value equivalent through discounting. The discounting process uses a rate of return that is commensurate with the risk associated with the business and the time value of money. This approach requires assumptions about revenue growth rates, operating margins, capital expenditures, tax rates and discount rates. Market approach The market approach assumes that companies operating in the same industry will share similar characteristics and that company values will correlate to those characteristics. Therefore, a comparison of a CGU to similar companies whose financial information is publicly available may provide a reasonable basis to estimate fair value. Under the market approach, fair value is calculated based on revenue or EBITDA multiples of benchmark companies comparable to the businesses in each CGU. Data for the benchmark companies was obtained from publicly available information. Significant Assumptions Weighting of Valuation Techniques The Company weighted the results of the two valuation techniques noted above, consistently applied to each CGU, as follows: 60% income approach/40% market approach. The Company believes that given volatility in capital markets, it is appropriate to apply a heavier weighting to the income approach. Cash Flow Projections Cash flow projections were based on the Company’s internal budget. The Company projected cash flows for a period of three years and applied a perpetual growth rate thereafter, as prescribed by IAS 36. To project cash flows for the three-year period, the Company considered growth in revenues and costs as well as capital expenditures. In preparing its projections, the Company considered past experience, economic trends such as GDP growth and inflation as well as industry and market trends. The projections also considered the expected impact from efficiency initiatives, new product launches, customer retention, as well as the maturity of the markets in which each business operates. Discount Rate The Company assumed a discount rate to calculate the present value of its projected cash flows. The discount rate represented a weighted-average cost of capital (“WACC”) for comparable companies operating in similar industries as the applicable CGU, based on publicly available information. The WACC is an estimate of the overall required rate of return on an investment for both debt and equity owners and serves as the basis for developing an appropriate discount rate. Determination of the WACC requires separate analysis of the cost of equity and the cost of debt. The cost of equity reflects the long-term risk-free interest rate associated with U.S. Treasury bonds and considers a risk premium based on an assessment of risks related to the projected cash flows of each CGU. Lower discount rates were applied to CGUs whose cash flows are expected to be less volatile due to factors such as the maturity of the market they serve and their market position. Higher discount rates were applied to CGUs whose cash flows are expected to be more volatile due to competition or participation in less stable geographic markets. Tax Rate The tax rates applied to the projections were based on effective tax rates of comparable companies operating in similar industries as the applicable CGU, based on publicly available information, or statutory tax rates. Tax assumptions are sensitive to changes in tax laws and the jurisdictions in which profits are earned. The key assumptions used in performing the impairment test, by CGU, are presented below: Cash-Generating Unit Perpetual (1) Discount Tax Legal Professionals 2.5 % 7.0 % 25.6 % Corporates 2.5 % 8.0 % 25.9 % Tax & Accounting Professionals 3.0 % 8.5 % 26.8 % Reuters News 2.5 % 9.0 % 20.8 % Global Print (4.4 %) 9.0 % 25.8 % (1) The perpetual growth rate is applied to the final year of cash flow projections. Results and Sensitivities The fair value for each CGU exceeded its carrying value by over 100%. Therefore, the sensitivity analysis demonstrated that no reasonably possible change in the perpetual growth, discount rate or income tax assumptions would cause the carrying amounts of any CGU to exceed its recoverable amount.

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Financial Instruments	Note 19: Financial Instruments Financial assets and liabilities Financial assets and liabilities in the consolidated statement of financial position were as follows: December 31, 2020 Assets/(Liabilities) at Amortized Cost Assets/(Liabilities) at Fair Value through Earnings Assets at Fair Value through Other Comprehensive Income or Loss Derivatives Used for Hedging (1) Total Cash and cash equivalents 311 1,476 - - 1,787 Trade and other receivables 1,151 - - - 1,151 Other financial assets – current 95 517 - - 612 Other financial assets – non-current (see note 20) 35 17 46 100 198 Trade payables (see note 21) (217) - - - (217) Accruals (see note 21) (761) - - - (761) Other financial liabilities – current (2) (3) (374) (2) - - (376) Long-term indebtedness (3,772) - - - (3,772) Other financial liabilities – non-current (see note 22) (4) (223) (1) - - (224) Total (3,755) 2,007 46 100 (1,602) December 31, 2019 Assets/(Liabilities) at Amortized Cost Assets/(Liabilities) at Fair Value through Earnings Assets at Fair Value through Other Comprehensive Income or Loss Derivatives Used for Hedging (1) Total Cash and cash equivalents 335 490 - - 825 Trade and other receivables 1,167 - - - 1,167 Other financial assets – current 98 435 - - 533 Other financial assets – non-current (see note 20) 45 24 29 - 98 Current indebtedness (579) - - - (579) Trade payables (see note 21) (265) - - - (265) Accruals (see note 21) (801) - - - (801) Other financial liabilities – current (2)(3) (365) (7) - (62) (434) Long-term indebtedness (2,676) - - - (2,676) Other financial liabilities – non-current (see note 22) (4) (253) (3) - - (256) Total (3,294) 939 29 (62) (2,388) (1) Derivatives are entered into with specific objectives for each transaction, and are linked to specific assets, liabilities, firm commitments, or highly probable forecasted transactions. (2) Includes lease liabilities of $83 million (2019 - $69 million). (3) Includes a commitment to repurchase up to $200 million (2019 - $200 million) of shares related to the Company’s pre-defined (4) Includes lease liabilities of $223 million (2019 - $253 million). Fair Value The fair values of cash and cash equivalents, trade and other receivables, trade payables and accruals approximate their carrying amounts because of the short-term maturity of these instruments. The fair value of long-term debt and related derivative instruments is set forth below. Debt and Related Derivative Instruments Carrying Amounts Amounts recorded in the consolidated statement of financial position are referred to as “carrying amounts”. The carrying amounts of primary debt are reflected in “Long-term indebtedness” and “Current indebtedness” and the carrying amounts of derivative instruments are included in “Other financial assets” and “Other financial liabilities”, both current and non-current, Fair Value The fair value of debt is estimated based on either quoted market prices for similar issues or current rates offered to the Company for debt of the same maturity. The fair value of interest rate swaps is estimated based upon discounted cash flows using applicable current market rates and considering non-performance The following is a summary of debt and related derivative instruments that hedged the cash flows of debt: Carrying Amount Fair Value December 31, 2020 Primary Debt Derivative Primary Debt Derivative Instruments C$1,400, 2.239% Notes, due 2025 1,093 (100 ) 1,151 (100 ) $600, 4.30% Notes, due 2023 597 - 657 - $450, 3.85% Notes, due 2024 (1) 241 - 266 - $500, 3.35% Notes, due 2026 497 - 557 - $350, 4.50% Notes, due 2043 (1) 116 - 130 - $350, 5.65% Notes, due 2043 342 - 471 - $400, 5.50% Debentures, due 2035 395 - 531 - $500, 5.85% Debentures, due 2040 491 - 696 - Total 3,772 (100 ) 4,459 (100 ) Long-term 3,772 (100 ) (1) Notes were partially redeemed in October 2018. Carrying Amount Fair Value December 31, 2019 Primary Debt Derivative Primary Debt Derivative Instruments Liability Bank and other 1 - 1 - C$550, 3.309% Notes, due 2021 435 62 435 62 $350, 3.95% Notes, due 2021 (1) 143 - 143 - $600, 4.30% Notes, due 2023 596 - 639 - $450, 3.85% Notes, due 2024 (1) 240 - 254 - $500, 3.35% Notes, due 2026 496 - 513 - $350, 4.50% Notes, due 2043 (1) 116 - 120 - $350, 5.65% Notes, due 2043 342 - 412 - $400, 5.50% Debentures, due 2035 395 - 447 - $500, 5.85% Debentures, due 2040 491 - 592 - Total 3,255 62 3,556 62 Current portion 579 62 Long-term portion 2,676 - (1) Notes were partially redeemed in October 2018. Long-term Debt Activity The following table provides information regarding notes that the Company issued and repaid in 2020. Month/Year Transaction Principal Amount (in millions) Notes issued May 2020 2.239% Notes, due C$1,400 Notes repaid January 2020 3.309% Notes, due 2021 C$550 January 2020 3.95% Notes, due 2021 US$139 The notes issued in May 2020 were immediately swapped into U.S. dollars and the Company used the $999 million of net proceeds for general corporate purposes, which included repayment of borrowings under the Company’s credit facility. In January 2020, the Company repaid notes prior to their scheduled maturity dates for $640 million. This amount included early redemption premiums and the settlement of cross-currency swaps. The repayments were funded with commercial paper borrowings. The Company did not issue notes or make any debt repayments in 2019. Cross-currency interest rate swaps The Company uses fixed-to-fixed At December 31, 2020 and December 31, 2019, the Company recorded swaps outstanding in the consolidated statement of financial position at their fair value, which was an asset of $100 million (2019 – net liability of $62 million). These swaps were designated as cash flow hedges. The details of these instruments are set forth below: Received Paid Hedged Risk Year of Maturity Principal Amount 2020 Cash flow hedges Canadian dollar fixed U.S. dollar fixed Foreign exchange 2025 US$999 Received Paid Hedged Risk Year of Maturity Principal Amount 2019 Cash flow hedges Canadian dollar fixed U.S. dollar fixed Foreign exchange 2020 US$483 The ineffective portion of the cash flow hedges recognized through earnings was a gain of $10 million for the year ended December 31, 2020 (2019 – nil). The gain was reclassified from “Cash flow hedges adjustments to net earnings” in the consolidated statement of comprehensive income to “Other finance income (costs)” in the consolidated income statement. Currency Risk Exposures At each reporting date presented, substantially all indebtedness was denominated in U.S. dollars or had been swapped into U.S. dollar obligations. The carrying amount of debt, all of which is unsecured, was denominated in the following currencies: Before Currency Hedging Arrangements After Currency Hedging Arrangements December 31, December 31, 2020 2019 2020 2019 (1) Canadian dollar 1,093 435 - - U.S. dollar 2,679 2,819 3,672 3,316 Other currencies - 1 - 1 3,772 3,255 3,672 3,317 (1) Includes fair value adjustments of $3 million at December 31, 2019 associated with the interest related fair value component of the hedging instrument settled in January 2020. Interest Rate Risk Exposures At December 31, 2020 and 2019, the Company’s notes and debentures (after swaps) pay interest at fixed rates. The weighted-average interest rate was 4.1% in 2020 (2019 – 4.6%). Foreign Exchange Contracts There were no foreign exchange contracts outstanding at December 31, 2020. In 2019, the Company had foreign exchange contracts to sell British pound sterling to manage foreign exchange risk on certain cash flows excluding indebtedness. At December 31, 2019, the cumulative U.S. dollar notional amount of contracts outstanding was $111 million. The fair value of these contracts was a liability of $7 million reported within “Other financial liabilities – current” in the consolidated statement of financial position. Fair value gains and losses from derivative financial instruments Fair value gains and losses from derivative financial instruments recognized in the consolidated income statement and consolidated statement of changes in equity were as follows: Year ended December 31, 2020 2019 Fair Value Gain Fair Value Loss Fair Value Gain Fair Value Loss Warrants 82 – 419 – Foreign exchange contracts 11 – (7 ) – Hedging instruments: Cross currency interest rate swaps – cash flow hedges (1) 107 (11 ) 19 (6 ) Forward interest rate swaps – cash flow hedges 1 – 1 – 201 (11 ) 432 (6 ) (1) In 2020, comprised of $97 million (2019 - $21 million) of foreign exchange gains, hedge ineffectiveness of $10 million (2019 - nil) related to hedges on Canadian dollar denominated debt, and nil (2019 - $2 million loss) relating to swaps that were terminated ahead of their maturity in connection with the early repayment of the related hedged debt. Financial Risk Management The Company is exposed to a variety of financial risks including market risk (primarily currency risk and interest rate risk), credit risk and liquidity risk, as its operations are diverse and global. A centralized corporate treasury group works to minimize the potential adverse effects from these risks by using hedging strategies, where applicable, as well as associating with high quality financial institutions, limiting exposures to counterparties and ensuring flexible sources of funding. The Chief Financial Officer oversees the overall approach and ensures the use of strict guidelines and internal control processes. Market Risk Currency Risk The Company’s consolidated financial statements are expressed in U.S. dollars. However, the Company transacts a portion of its business in other currencies and is therefore subject to the effects of foreign currency translation into U.S. dollars as well as currency transaction risk. The impact of foreign currency translation from changes in exchange rates between 2019 and 2020 decreased consolidated revenues and operating expenses each by 1%, and generated $12 million of net translation losses in the consolidated statement of financial position (2019 - $109 million of net translation gains), which were recorded within accumulated other comprehensive loss in shareholders’ equity. Exposure to currency transaction risk is minimized as the Company generally bills customers and incurs operating expenses in the functional currency of the legal entity that records the transaction. However, the Company is exposed to currency transaction risk from the revaluation of non-permanent The table below shows the impact on earnings that a hypothetical 10% strengthening of the U.S. dollar against other foreign currencies would have as a result of changes in fair values of financial instruments as of December 31, 2020. (Decrease) increase to earnings £ € C$ Other Currencies Total Impact on earnings from financial assets and liabilities (1) - (1) - 3 2 Impact on earnings from non-permanent intercompany loans (21) (3) 52 (7) 21 Total impact on earnings (21) (4) 52 (4) 23 (1) Excludes debt which has been swapped into U.S. dollar obligations. The Company only uses derivative instruments to reduce foreign currency and interest rate exposures. Canadian dollar borrowings are generally converted to U.S. dollar obligations through currency swap arrangements. At each reporting date presented, substantially all indebtedness was denominated in U.S. dollars or had been swapped into U.S. dollar obligations. Interest Rate Risk The Company is exposed to fluctuations in interest rates with respect to cash and cash equivalents and long-term borrowings. As of December 31, 2020, the majority of $1,787 million (2019 - $825 million) in cash and cash equivalents was comprised of interest-bearing assets. Based on amounts as of December 31, 2020, a 100-basis At December 31, 2020, the Company’s notes and debentures (after swaps) pay interest at fixed rates. As of December 31, 2020, there were no derivatives designated as fair value hedges. Price Risk The Company has no significant exposure to price risk from equity securities or commodities in the normal course of business. However, the value of the Company’s warrants in Refinitiv (see the “Valuation of the Refinitiv Warrants” section below for additional information) and the value of the transaction with LSEG (see note 8) have been subject to change as a result of changes in the price of LSEG shares. In the future, the Company’s indirect investment in LSEG will be subject to variability based on changes in the price of LSEG shares and changes in the British pound sterling and U.S. dollar foreign exchange rate (see note 32). Credit Risk Credit risk arises from cash and cash equivalents and derivative financial instruments, as well as credit exposure to customers including outstanding receivables. The Company attempts to minimize credit exposure as follows: · Cash investments are placed with high-quality financial institutions with limited exposure to any one institution. At December 31, 2020, approximately 99% of cash and cash equivalents were held by institutions that were rated at “A-“ · Counterparties to derivative contracts are major investment-grade international financial institutions and exposure to any single counterparty is monitored and limited; and · The Company assesses the creditworthiness of its customers. No allowance for credit losses on financial assets was required as of December 31, 2020, other than the allowance for doubtful accounts (see note 13). Further, no financial or other assets have been pledged. The Company’s maximum exposure with respect to credit, assuming no mitigating factors, would be the aggregate of its cash and cash equivalents $1,787 million (2019 - $825 million), trade and other receivables $1,151 million (2019 - $1,167 million), derivative exposures $100 million (2019 - nil) and other financial assets $664 million (2019 - $602 million). Liquidity Risk A centralized treasury function ensures funding flexibility by assessing future cash flow expectations and by maintaining sufficient capacity under its committed borrowing facilities. Cash flow estimates are based on rolling forecasts of operating, investing and financing flows. Such forecasting also considers account borrowing limits, cash restrictions and compliance with debt covenants. Cash which is surplus to working capital requirements is invested in money market funds or bank money market deposits with maturities aligned to expected cash needs. As at December 31, 2020, cash and cash equivalents were $1.8 billion. In addition, the Company maintains a commercial paper program, which provides cost-effective and flexible short-term funding, and a $1.8 billion credit facility, which provides additional liquidity, as further described below. Commercial Paper Program Under its commercial paper program, the Company may issue up to $1.8 billion of notes. There was no outstanding commercial paper at December 31, 2020 and 2019. In January 2020, the Company issued $630 million of commercial paper, the proceeds of which were used to redeem debt obligations ahead of their maturity. The Company’s commercial paper borrowings were repaid later in the year, primarily from funds borrowed under its credit facility, as discussed below. The Company did not issue commercial paper in 2019. Credit Facility The Company has a $1.8 billion syndicated credit facility agreement which matures in December 2024 and may be used to provide liquidity for general corporate purposes (including acquisitions or support for its commercial paper program). There were no outstanding borrowings under the credit facility at December 31, 2020 and 2019. In 2020, the Company borrowed and repaid $1.0 billion under this facility. Based on the Company’s current credit ratings, the cost of borrowing under the facility is priced at LIBOR/EURIBOR plus 112.5 basis points. The Company has the option to request an increase, subject to approval by applicable lenders, in the lenders’ commitments in an aggregate amount of $600 million for a maximum credit facility commitment of $2.4 billion. The U.K. Financial Conduct Authority, which regulates LIBOR, intends to phase out LIBOR by the end of 2021. Key alternative reference rates have been established and progress continues to be made in establishing better liquidity and term structures required to efficiently replace the existing LIBOR structures. With the exception of the LIBOR-based benchmarks within the Company’s external credit facility, the Company has no material agreements with third-parties that use or reference LIBOR as a benchmark rate which requires amendment. If the Company’s debt rating is downgraded by Moody’s or S&P, the facility fees and borrowing costs may increase, although availability would be unaffected. Conversely, an upgrade in the Company’s ratings may reduce the facility fees and borrowing costs. The Company guarantees borrowings by its subsidiaries under the credit facility. The Company must also maintain a ratio of net debt as defined in the credit agreement (total debt after swaps less cash and cash equivalents) as of the last day of each fiscal quarter to EBITDA as defined in the credit agreement (earnings before interest, income taxes, depreciation and amortization and other modifications described in the credit agreement) for the last four quarters ended of not more than 4.5:1. If the Company were to complete an acquisition with a purchase price of over $500 million, the ratio of net debt to EBITDA would temporarily increase to 5.0:1 for three quarters after completion, at which time the ratio would revert to 4.5:1. As of December 31, 2020, the Company was in compliance with this covenant as its ratio of net debt to EBITDA, as calculated under the terms of its syndicated credit facility, was 1.0:1. The tables below set forth non-derivative December 31, 2020 2021 2022 2023 2024 2025 Thereafter Total Long-term debt (1) - - 600 242 1,099 1,869 3,810 Interest payable (1) 153 153 153 127 105 1,103 1,794 Debt-related hedges outflows 22 22 22 22 1,010 - 1,098 Debt-related hedges inflows (1) (25) (25) (25) (25) (1,110) - (1,210) Trade payables 217 - - - - - 217 Accruals 761 - - - - - 761 Lease liabilities 92 76 49 39 29 44 329 Other financial liabilities 291 - - - - - 291 Total 1,511 226 799 405 1,133 3,016 7,090 December 31, 2019 2020 2021 2022 2023 2024 Thereafter Total Current debt (2) 579 - - - - - 579 Long-term debt (3) - - - 600 242 1,869 2,711 Interest payable (3) 132 128 128 128 102 1,196 1,814 Debt-related hedges outflows (2) 499 - - - - - 499 Debt-related hedges inflows (2) (437) - - - - - (437) Trade payables 265 - - - - - 265 Accruals 801 - - - - - 801 Lease liabilities 80 75 60 41 34 64 354 Other financial liabilities 295 - - - - - 295 Total 2,214 203 188 769 378 3,129 6,881 (1) Represents contractual cash flows calculated using spot foreign exchange rates as of December 31, 2020. (2) Represents early repayment of hedged Canadian debt and U.S. dollar denominated debt redeemed in January 2020. (3) Represents contractual principal and interest payments. Capital Management The Company’s capital management strategy is focused on ensuring that it has the investment capacity to drive revenue growth both organically and through acquisitions, while also maintaining its long-term financial leverage and credit ratings and continuing to provide returns to shareholders. The Company’s existing sources of liquidity are cash and cash equivalents, cash provided by operating activities, the commercial paper program, and credit facility. From time to time, the Company issues debt securities. These sources will generate sufficient funding for the Company to meet its current obligations as well as allowing for: (i) reinvestment in the business through capital expenditures and acquisitions; (ii) debt service; and (iii) returns to shareholders in the form of dividends and share buybacks. The Company has set a target to maintain approximately 500 million common shares outstanding by using share repurchases to offset dilution associated with its dividend reinvestment and equity incentive plans. Additionally, the Company targets a leverage ratio of net debt, as defined below, to adjusted EBITDA of no more than 2.5x as a measure of its financial flexibility and ability to maintain investment grade credit ratings. As of December 31, 2020, the Company was below its maximum target ratio. The Company’s investment grade credit ratings provide added financial flexibility and the ability to borrow to support the operations and growth strategies of the business. The following table sets forth the credit ratings that the Company has received from rating agencies in respect of its outstanding securities as of December 31, 2020:​​​​​​​​​​​​​​ Moody’s S&P Global Ratings DBRS Limited Fitch Long-term debt Baa2 BBB BBB (high) BBB+ Commercial paper P-2 A-2 R-2 (high) F1 Trend/Outlook Stable Stable Stable Stable Net debt is defined as total indebtedness (excluding the associated unamortized transaction costs and premiums or discounts) plus the currency related fair value of associated hedging instruments, and lease liabilities less cash and cash equivalents. As the Company hedges some of its debt to reduce risk, the hedging instruments are included in the measurement of the total obligation associated with its outstanding debt. However, because the Company generally intends to hold the debt and related hedges to maturity, it does not consider the associated fair value of the interest-related component of hedging instruments in the measurement of net debt. The following table presents the calculation of net debt (1) December 31, 2020 2019 Current indebtedness - 579 Long-term indebtedness 3,772 2,676 Total debt 3,772 3,255 Swaps (100) 62 Total debt after swaps 3,672 3,317 Remove fair value adjustments for hedges (2) 1 - Total debt after currency hedging arrangements 3,673 3,317 Remove transaction costs, premiums or discounts included in the carrying value of debt 38 36 Add: Lease liabilities (current and non-current) 306 322 Less: cash and cash equivalents (1,787) (825) Net debt (1) 2,230 2,850 (1) Net debt is a non-IFRS (2) Represents the interest-related fair value component of hedging instruments that are removed to reflect net cash outflow upon maturity. The following is a reconciliation on movements of liabilities to cash flows arising from financing activities for the years ended December 31, 2020 and 2019: Notes and (1) Credit Derivative (Assets) Lease Total Liabilities December 31, 2018 3,216 - 76 - 3,292 IFRS 16 adoption - - - 197 197 Payments of lease principal - - - (51) (51) Additional leases - - - 176 176 Foreign exchange movements 21 - (21) - - Other, net (2) 18 - 7 - 25 December 31, 2019 3,255 - 62 322 3,639 Proceeds from debt 999 1,020 - - 2,019 Repayments of debt (560) (1,020) (65) - (1,645) Payments of lease principal - - - (75) (75) Additional leases - - - 58 58 Foreign exchange movements 97 - (97) 4 4 Other, net (2) (19) - - (3) (22) December 31, 2020 3,772 - (100) 306 3,978 (1) Includes bank and other financial instruments in current indebtedness. (2) Includes early redemption premium on debt, amortization of transaction and discount costs, fair value movements on derivatives and lease interest payments. Fair value estimation The following fair value measurement hierarchy is used for financial instruments that are measured in the consolidated statement of financial position at fair value: · Level 1 quoted prices (unadjusted) in active markets for identical assets or liabilities; · Level 2 inputs other than quoted prices included within level 1 that are observable for the asset or liability, either directly (that is, as prices) or indirectly (that is, derived from prices); and · Level 3 inputs for the asset or liability that are not based on observable market data (that is, unobservable inputs). The levels used to determine fair value measurements for those instruments carried at fair value in the consolidated statement of financial position are as follows: December 31, 2020 Total Assets Level 1 Level 2 Level 3 Balance Money market accounts - 1,476 - 1,476 Warrants (1) - - 517 517 Other receivables (2) - - 17 17 Financial assets at fair value through earnings - 1,476 534 2,010 Financial assets at fair value through other comprehensive income (3) 27 19 - 46 Derivatives used for hedging (4) - 100 - 100 Total assets 27 1,595 534 2,156 Liabilities Contingent consideration (5) - - (3) (3) Financial liabilities at fair value through earnings - - (3) (3) Total liabilities - - (3) (3) December 31, 2019 Total Assets Level 1 Level 2 Level 3 Balance Money market accounts - 490 - 490 Warrants (1) - - 435 435 Other receivables (2) - - 24 24 Financial assets at fair value through earnings - 490 459 949 Financial assets at fair value through other comprehensive income (3) 2 27 - 29 Total assets 2 517 459 978 Liabilities Forward exchange contracts (6) - (7) - (7) Contingent consideration (5) - - (3) (3) Financial liabilities at fair value through earnings - (7) (3) (10) Derivatives used for hedging (4) - (62) - (62) Total liabilities - (69) (3) (72) (1) Warrants relate to the Company’s former equity method investment in Refinitiv (see note 8). (2) Receivables under indemnification arrangement (see note 30). (3) Investments in entities over which the Company does not have control, joint control or significant influence. (4) Comprised of fixed-to-fixed (5) Obligations to pay additional consideration for prior acquisitions, based upon performance measures contractually agreed at the time of purchase. (6) Used to manage foreign exchange risk on cash flows excluding indebtedness. The following reflects the change in the fair value of the Refinitiv warrants, which were classified as level 3 in the fair value measurement hierarchy, for the years ended December 31, 2020 and 2019: Year ended December 31, 2020 2019 January 1, 435 16 Gain recognized within other operating gains, net 82 419 December 31, 517 435 The Company recognizes transfers into and out of the fair value measurement hierarchy levels at the end of the reporting period in which the event or change in circumstances that caused the transfer occurred. There were no transfers between hierarchy levels for the years ending December 31, 2020 and 2019. Valuation Techniques The fair value of financial instruments that are not traded in an active market (for example, over-the-counter Specific valuation techniques used to value financial instruments include: · Quoted market prices or dealer quotes for similar instruments; · The fair value of cross-currency interest rate swaps and forward foreign exchange contracts are calculated as the present value of the estimated future cash flows based on observable yield curves; · The fair value of other receivables considers estimated future cash flows, current market interest rates and non-performance · The fair value of contingent consideration is calculated based on estimates of future revenue performance. Valuation of the Refinitiv Warrants · On August 1, 2019, the Company and private equity funds affiliated with Blackstone agreed to sell Refinitiv, in which the Company owned a 45% interest, to LSEG, in an all share transaction which closed on January 29, 2021 (see note 8). Under the terms of the warrant agreement, the transaction constituted a change in control whereby the exercise of the warrants in connection with the closing of the transaction entitled the Company to an additional 4.5 million shares of Refinitiv. The value of the warrants at December 31, 2020 and 2019 reflected the entry into a definitive agreement for the sale of the Refinitiv business on August 1, 2019. The closing of the transaction on January 29, 2021 was not considered an adjusting subsequent event, and therefore the value at December 31, 2020 was not adjusted to incorporate the closing of the transaction. As such, the value at each date was primarily based on the number of incremental shares in Refinitiv to which the Company was entitled upon closing and the share price of LSEG on December 31, 2020 and 2019, respectively. The valuation also incorporated (on a weighted-average basis) other outcomes based on the likelihood of the transaction closing. In the first quarter of 2021, the Company will record a gain on the transaction that includes the value of the warrants based on the share price of LSEG on January 29, 2021. · The Monte Carlo simulation approach, which was incorporated into the valuation of the Refinitiv warrants, generates values based on the random outcomes from a probability distribution. Key inputs under the Monte Carlo approach include: the estimated equity value of Refinitiv; the capitalization structure of Refinitiv; the expected volatility; the risk-free rate of return; annual dividends or distributions; and assumptions about the timing of a liquidity event. An increase in the equity value would typically have resulted in an increase in the fair value of the warrants and conversely, a decrease would typically have resulted in a decrease in the fair value of the warrants. Offsetting Financial Assets and Financial Liabilities The Company is subject to master netting arrangements with certain counterparties. Certain of these arrangements allow for the netting of assets and liabilities in the ordinary course of business, and are reflected on a net basis in the consolidated statement of financial position. In other circumstances, netting is permitted only in the event of bankruptcy or default of either party to the agreement, and such amounts are not netted in the consolidated statement of financial position. The following table sets forth balances that are subject to master netting arrangements, however there were no offsetting amounts at December 31, 2020 or 2019. Financial assets Gross Financial Assets Gross Financial Liabilities Netted Against Assets Net Financial Assets in the Consolidated Statement of Financial Position Related Financial Liabilities Not Netted Net Amount Derivative financial assets 100 - 100 (1) - 100 Cash and cash equivalents 33 - 33 (2) - 33 December 31, 2020 133 - 133 - 133 Cash and cash equivalents 17 - 17 (2) - 17 December 31, 2019 17 - 17 - 17 Financial liabilities Gross Gross Financial Net Financial Liabilities Related Financial Net Derivative financial liabilities 68 - 68 (3) - 68 Bank indebtedness 1 - 1 (4) - 1 December 31, 2019 69 - 69 - 69 (1) Included within “Other financial assets” – non-current in the consolidated statement of financial position. (2) Included within “Cash and cash equivalents” in the consolidated statement of financial position. (3) Included within “Other financial liabilities” – current and “Provisions and other non-current liabilities”, in the consolidated statement of financial position. (4) Included within “Current indebtedness” in the consolidated statement of financial position.

Other Non-Current Assets

Other Non-Current Assets	12 Months Ended
	Dec. 31, 2020
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Other Non-Current Assets	Note 20: Other Non-Current December 31, 2020 2019 Net defined benefit plan surpluses (see note 26) 128 85 Cash surrender value of life insurance policies 334 320 Deferred commissions 105 82 Other financial assets (see note 19) 198 98 Other non-current assets 23 26 Total other non-current assets 788 611

Payables, Accruals and Provisio

Payables, Accruals and Provisions	12 Months Ended
	Dec. 31, 2020
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Payables, Accruals and Provisions	Note 21: Payables, Accruals and Provisions December 31, 2020 2019 Trade payables 217 265 Current tax liabilities (1) 251 124 Accruals 761 801 Provisions (see note 22) 111 119 Other current liabilities 70 64 Total payables, accruals and provisions 1,410 1,373 (1) Includes $214 million (2019 – $204 million) of uncertain tax positions, that were net of tax receivables in the same jurisdictions.

Provisions and Other Non-Curren

Provisions and Other Non-Current Liabilities	12 Months Ended
	Dec. 31, 2020
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Provisions and Other Non-Current Liabilities	Note 22: Provisions and Other Non-Current December 31, 2020 2019 Net defined benefit plan obligations (see note 26) 598 714 Other financial liabilities (see note 19) 224 256 Deferred compensation and employee incentives (1) 111 141 Provisions 140 126 Other non-current liabilities 10 27 Total provisions and other non-current liabilities 1,083 1,264 (1) In June 2020, the Company amended its non-employee director compensation plan such that the directors no longer control the decision as to whether DSUs earned as part of their compensation are settled in cash or common shares. As a result, director DSUs are now classified as equity settled and $27 million was reclassified to “Contributed surplus.” The following table presents the movement in provisions for the years ended December 31, 2020 and 2019: Employee- Restructuring Facilities- Other Total Balance at December 31, 2018 - 94 28 209 331 Charges 12 117 3 70 202 Utilization (25) (145) (18) (113) (301) Translation and other, net 13 (10) 14 (4) 13 Balance at December 31, 2019 - 56 27 162 245 Less: short-term provisions - 56 2 61 119 Long-term provisions - - 25 101 126 Balance at December 31, 2019 - 56 27 162 245 Charges 61 - 3 30 94 Utilization (15) (52) (2) (7) (76) Translation and other, net - 1 - (13) (12) Balance at December 31, 2020 46 5 28 172 251 Less: short-term provisions 46 5 3 57 111 Long-term provisions - - 25 115 140 Employee-related The employee-related provisions consisted of severance. Restructuring In 2019, the Company incurred $117 million of severance costs associated with reductions in workforce to de-layer Facilities-related Facilities-related provisions include lease retirement obligations, which arise when the Company agrees to restore a leased property to a specified condition at the completion of the lease period. Lease retirement provisions relate primarily to leases which expire over the next four years. Other Other includes various items arising in the normal course of business such as disposal related reserves, legal provisions and reserves for health care.

Deferred Tax

Deferred Tax	12 Months Ended
	Dec. 31, 2020
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Deferred Tax	Note 23: Deferred Tax The movements of deferred tax assets and liabilities are shown below: Deferred tax liabilities Goodwill and Other Computer Software, Equity Method Other Total December 31, 2018 528 18 463 239 1,248 Impact of IFRS 16 adoption - 38 - 10 48 Acquisitions 63 16 - - 79 Benefit to income statement – continuing operations (11) (19) (158) (62) (250) Benefit to income statement – discontinued operations - (4) (2) - (6) Benefit to other comprehensive income - - (9) - (9) Disposals of businesses (2) (12) - - (14) Translation and other, net - 1 - 13 14 December 31, 2019 578 38 294 200 1,110 Acquisitions 5 2 - - 7 (Benefit) expense to income statement – continuing operations (33) (19) (159) 48 (163) Expense to other comprehensive income - - 36 - 36 Translation and other, net (4) 2 1 2 1 December 31, 2020 546 23 172 250 991 Deferred tax assets Tax Losses Goodwill and Other (1) Employee Benefits Other Total December 31, 2018 73 11 238 177 499 Impact of IFRS 16 adoption - - - 45 45 Benefit (expense) to income statement - continuing operations 7 1,158 (5) (15) 1,145 Expense to income statement - discontinued operations (7) - - (6) (13) Benefit to other comprehensive income - - 12 - 12 Benefit to equity - - 8 - 8 Disposals of businesses - - - (1) (1) Translation and other, net 18 (1) - (2) 15 December 31, 2019 91 1,168 253 198 1,710 Benefit (expense) to income statement - continuing operations 29 (59) (24) 122 68 Benefit to income statement - discontinued operations - - - 4 4 Expense to other comprehensive income - - (17) - (17) Benefit to equity - - 3 - 3 Translation and other, net 11 1 (1) 22 33 December 31, 2020 131 1,110 214 346 1,801 Net deferred tax asset at December 31, 2019 600 Net deferred tax asset at December 31, 2020 810 (1) The 2019 period included a $1.2 billion increase in the tax basis of assets owned by a foreign subsidiary. The estimated recovery period for the deferred tax balances is shown below: December 31, 2020 2019 Deferred tax liabilities Deferred tax liabilities to be recovered after more than 12 months 866 1,107 Deferred tax liabilities to be recovered within 12 months 125 3 Total deferred tax liabilities 991 1,110 Deferred tax assets Deferred tax assets to be recovered after more than 12 months 1,666 1,616 Deferred tax assets to be recovered within 12 months 135 94 Total deferred tax assets 1,801 1,710 Net deferred tax asset 810 600 In December 2019, the Company reorganized the operations of certain foreign affiliates that were subject to different tax rates. The reorganization resulted in an increase in the tax basis of the reorganized business to the acquiror and a related tax benefit of $1.2 billion. The Company recognized a $1.2 billion deferred tax asset, which it expects to realize in subsequent periods, based on the historical and expected future profitability of the reorganized business. Deferred tax assets are recognized to the extent that the realization of the related tax benefit through future taxable profits and the resolution of uncertain tax positions is probable. The ability to realize these deferred tax benefits is dependent on a number of factors, including the future profitability of operations and the resolution of tax audits in the jurisdictions in which the deferred tax assets arose. At December 31, 2020, the following summarizes the Company’s tax losses, certain deductible temporary differences and other tax attributes: Carry Forward Loss/ Tax Value Unrecognized Net Deferred Tax (1) Canadian net operating losses 2,130 562 (559) 3 Net operating losses – other jurisdictions 1,911 491 (430) 61 Capital losses 737 162 (99) 63 Investment in subsidiaries 300 75 (75) - Other deductible temporary differences 30 8 (8) - U.S. state net operating losses (2) n/m 12 (10) 2 Other attributes and credits (3) n/m 87 (7) 80 Total 1,397 (1,188) 209 (1) Includes tax losses of $131 million and $78 million of other deferred tax assets. (2) The aggregation of U.S. state net operating losses is not meaningful due to differing combination and apportionment rules in various states. (3) As other attributes and credits are calculated on an after-tax If not utilized, most of the Canadian tax losses and U.S. state tax losses carried forward will expire between 2021 and 2040. Most of the tax losses carried forward in other jurisdictions may be carried forward indefinitely. No deferred tax is recognized on the temporary differences associated with investments in subsidiaries and equity method investments to the extent that the Company can control the timing and reversal of such differences, or the reversal would not create a tax liability. These temporary differences are primarily attributable to the undistributed earnings of non-Canadian

Capital

Capital	12 Months Ended
	Dec. 31, 2020
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Capital	Note 24: Capital The change in capital, which includes stated capital and contributed surplus, was as follows: Number of Stated Capital Series II, Cumulative Contributed Total Capital Balance, December 31, 2018 501,493,187 3,333 110 1,905 5,348 Shares issued under DRIP 361,470 23 - - 23 Stock compensation plans (1) 3,074,176 178 - (104) 74 Repurchases of common shares (2) (7,469,287) (68) - - (68) Balance, December 31, 2019 497,459,546 3,466 110 1,801 5,377 Shares issued under DRIP 313,879 23 - - 23 Stock compensation plans (1) 1,896,489 136 - (62) 74 Repurchases of common shares (2) (2,552,386) (16) - - (16) Balance, December 31, 2020 497,117,528 3,609 110 1,739 5,458 (1) Movements in contributed surplus include cash payments related to withholding tax on stock compensation plans. Additionally, in 2020, the Company amended its non-employee director compensation plan such that the directors no longer control the decision as to whether DSUs earned as part of their compensation are settled in cash or common shares. As a result, director DSUs are now classified as equity settled and $27 million was reclassified to “Contributed surplus” from “Provisions and other non-current liabilities” on the consolidated statement of financial position. (2) Stated capital was reduced ($18) million and ($20) million at December 31, 2020 and 2019, respectively, related to the Company’s pre-defined Common shares of the Company have no par value and the authorized common share capital is an unlimited number of shares. Dividends Dividends on common shares are declared in U.S. dollars. In the consolidated statement of cash flow, dividends paid on common shares are shown net of amounts reinvested in the Company under its dividend reinvestment plan (“DRIP”). Details of dividends declared per common share and dividends paid on common shares are as follows: Year ended December 31, 2020 2019 Dividends declared per common share $ 1.52 $ 1.44 Dividends declared 753 721 Dividends reinvested (23) (23) Dividends paid 730 698 Registered holders of common shares may participate in the DRIP, under which cash dividends are automatically reinvested in new common shares. Common shares are valued at the weighted-average price at which the shares traded on the TSX during the five trading days immediately preceding the record date for the dividend. Share Repurchases – Normal Course Issuer Bid (“NCIB”) The Company may buy back shares (and subsequently cancel them) from time to time as part of its capital strategy. Share repurchases are typically executed under a NCIB. Under the current NCIB, the Company may repurchase up to 5 million common shares between January 4, 2021 and January 3, 2022 in open market transactions on the TSX, the NYSE and/or other exchanges and alternative trading systems, if eligible, or by such other means as may be permitted by the TSX and/or NYSE or under applicable law, including private agreement purchases if the Company receives an issuer bid exemption order from applicable securities regulatory authorities in Canada for such purchases. The price that the Company will pay for shares in open market transactions under the NCIB will be the market price at the time of purchases or such other price as may be permitted by TSX. Details of share repurchases were as follows: Year ended December 31, 2020 2019 Share repurchases (millions of U.S. dollars) 200 488 Shares repurchased (number in millions) 2.6 7.8 Share repurchases – average price per share in U.S. dollars $ 78.37 $ 62.33 In February 2020, the Company completed the repurchase of $200 million of its common shares under a buyback program announced in October 2019. Decisions regarding any future repurchases will depend on factors such as market conditions, share price, and other opportunities to invest capital for growth. The Company may elect to suspend or discontinue its share repurchases at any time, in accordance with applicable laws. From time to time when the Company does not possess material nonpublic information about itself or its securities, it may enter into a pre-defined 10b5-1 Series II, Cumulative Redeemable Preference Shares The authorized preference share capital of the Company is an unlimited number of preference shares without par value. The directors are authorized to issue preference shares without par value in one or more series, and to determine the number of shares in, and terms attaching to, each such series. As of December 31, 2020 and 2019, 6,000,000 Series II, cumulative redeemable preference shares were authorized, issued and outstanding. The Series II preference shares are non-voting

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2020
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Share-Based Compensation	Note 25: Share-Based Compensation The Company operates equity-settled compensation plans under which it receives services from employees as consideration for equity instruments of the Company. Each plan is described below: Stock Incentive Plan Under its stock incentive plan, the Company may grant stock options, TRSUs, performance restricted share units (“PRSUs”) and other awards to certain employees for a maximum of up to 69,150,969 common shares. As of December 31, 2020, there were 11,106,551 awards available for grant (2019 – 12,703,952). The following table summarizes the methods used to measure fair value for each type of award and the related vesting period over which compensation expense is recognized: Equity-settled Type of award Vesting period Fair Value Measure Compensation expense based on: Stock options Up to four years Black-Scholes option pricing model Fair value on business day prior to grant date TRSUs Up to five years Closing common share price Fair value on business day prior to grant date PRSUs Three-year performance period Closing common share price Fair value on business day prior to grant date Additional information on each type of award is as follows: Stock Options The maximum term of an option is 10 years from the grant date. Under the plan, options may be granted by reference to the Company’s common share price on the NYSE or TSX. The weighted-average fair value of options granted for the years ended December 31, 2020 and 2019 and principal assumptions used in applying the Black-Scholes option pricing model were as follows: 2020 2019 Weighted-average fair value ($) 6.73 5.65 Weighted-average of key assumptions: Share price ($) 75.96 54.48 Exercise price ($) 75.96 54.48 Risk-free interest rate 0.9% 2.6% Dividend yield 3.1% 3.3% Volatility factor 16% 15% Expected life (in years) 5 5 The Black-Scholes model was developed for use in estimating the fair value of traded options that have no vesting restrictions. The model requires the use of subjective assumptions, including expected stock-price volatility. Historical data has been considered in setting the assumptions. Time-Based Restricted Share Units (TRSUs) TRSUs give the holder the right to receive one common share for each unit that vests on the vesting date. The holders of TRSUs have no voting rights and accumulate additional units based on notional dividends paid by the Company on its common shares on each dividend payment date, which are reinvested as additional TRSUs. The weighted-average fair value of TRSUs granted was $75.68 and $59.97 for the years ended December 31, 2020 and 2019, respectively. Performance Restricted Share Units (PRSUs) PRSUs give the holder the right to receive one common share for each unit that vests on the vesting date. The holders of PRSUs have no voting rights and accumulate additional units based on notional dividends paid by the Company on its common shares on each dividend payment date, which are reinvested as additional PRSUs. The percentage of PRSUs initially granted that vests depends upon the Company’s performance, typically over a three-year period, against pre-established Employee Stock Purchase Plan (ESPP) The Company maintains an ESPP whereby eligible employees can purchase common shares at a 15% discount to the closing share price on the NYSE on the last business day of each quarter. Each quarter, employees may elect to authorize payroll deductions from their eligible compensation, up to a maximum of $21,250 per year (or a comparable amount in foreign currency for the global ESPP). The discount is expensed as incurred. A maximum of 20,388,909 common shares can be purchased through the ESPP. The movement in the number of awards outstanding and their related weighted-average exercise prices are as follows: Stock TRSUs PRSUs Total Weighted- Average (1) Awards outstanding (in thousands): Outstanding at December 31, 2018 8,459 2,419 1,594 12,472 39.11 Granted 908 818 456 2,182 54.48 Exercised (3,971) (483) (1,087) (5,541) 38.21 Forfeited (322) (259) (82) (663) - Outstanding at December 31, 2019 5,074 2,495 881 8,450 42.36 Exercisable at December 31, 2019 1,449 - - 1,449 39.77 Granted 1,113 573 398 2,084 75.96 Exercised (2,575) (660) (463) (3,698) 40.05 Forfeited (151) (283) (71) (505) - Outstanding at December 31, 2020 3,461 2,125 745 6,331 54.06 Exercisable at December 31, 2020 577 - - 577 44.35 (1) Represents the weighted-average exercise price for stock options. TRSUs and PRSUs are excluded as they entitle holders to receive common shares upon vesting without an associated exercise price. In 2020, the weighted-average share price at the time of exercise for the awards described above was $69.98 per share (2019 - $59.61). Share-based compensation expense for years ended December 31, 2020 and 2019 was as follows: Stock Options TRSUs PRSUs ESPP Total December 31, 2020 7 40 13 4 64 December 31, 2019 5 35 12 4 56 Relative to the share-based awards outstanding at December 31, 2020, the Company expects to pay approximately $115 million at December 31, 2020 (2019 - $127 million) to tax authorities for employee withholding tax liabilities when these awards are exercised in the future. The following table summarizes additional information relating to stock options outstanding at December 31, 2020: Range of exercise prices (1) Number Weighted-Average Weighted-Average Number Exercisable Weighted-Average 35.01 - 40.00 1,090 7.23 $39.23 276 $38.47 40.01 - 45.00 574 6.17 $42.30 117 $42.30 50.01 - 55.00 753 8.18 $54.36 181 $54.36 60.01 - 65.00 12 8.36 $63.26 3 $63.26 75.01 - 80.00 1,032 9.18 $75.96 - - Total 3,461 577 (1) TRSUs and PRSUs are excluded as they entitle holders to receive common shares upon vesting without an associated exercise price.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2020
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Employee Benefit Plans	Note 26: Employee Benefit Plans Retirement Benefits The Company sponsors both defined benefit and defined contribution employee future benefit plans covering substantially all employees. Costs for future employee benefits are accrued over the periods in which employees earn the benefits. Defined benefit plans provide pension and other post-employment benefits (“OPEB”) to covered employees. Significant plans are valued under IAS 19, Employee Benefits The most significant funded defined benefit plans are the Thomson Reuters Group Pension Plan (“TRGP”), covering U.S. employees, and The Thomson Corporation PLC Pension Scheme (“TTC”), covering U.K. employees. The Company also has unfunded obligations consisting of supplemental executive retirement plans (“SERPs”) and OPEB consisting largely of retiree medical benefits, both primarily in the U.S. Defined benefit obligations in the rest of the world are less significant. Defined benefit plan design and governance Benefits payable are generally based on salary and years of service, although each plan has a unique benefits formula. Employees in the TTC plan (and in some smaller global plans) may also make voluntary contributions to augment future benefits. The normal retirement age is typically in the range of 60 to 65 years and benefits are generally payable in annuity or lump sum upon retirement. Most plans include provisions for early retirement, death, survivor and disability benefits. Under the TTC plan, vested benefits of former employees who are not yet of retirement age are held in deferment. Under the TRGP, former and future terminating employees with vested benefits have the option to receive benefits as a lump sum or to defer benefits until retirement. In addition, future TRGP retirees may receive benefits in lump sum or annuity. Eligible benefits under the TTC plan increase based on inflation, whereas TRGP benefits are not indexed to inflation. In some countries, the Company operates cash balance plans (accounted for as defined benefit obligations) where the accumulated balance on the pension account is based on employee and employer allocations and a promised annual crediting rate. Except where required by law, virtually all defined benefit plans are closed to new employees. The TRGP is a qualified pension plan in the U.S. and is governed by the Employee Retirement Income Security Act of 1974 (“ERISA”). In its role as plan fiduciary, the Company has a policy to contribute at least the minimum required amount under ERISA. Similar to the TRGP, the Company bears the cost of the TTC plan (less employee contributions). However, the responsibility for the management and governance of the TTC plan lies with an independent trustee board (the “Trustees”). The Trustees are responsible for carrying out triennial valuations (unless circumstances require an earlier review) and securing funding for benefit payments. To develop funding valuations and investment policies, the Trustees consult with the plan’s actuary (who is independent of the Company’s actuary), the plan’s investment advisors (also independent of the Company’s investment advisors) and the Company. The Trustees and the Company are required to agree on a schedule of contributions in support of funding objectives. These arrangements are updated in conjunction with the triennial valuations. Other international locations operate various pension plans in accordance with local regulations and practices. Plan amendment and curtailment In December 2020, the Company amended the TRGP to freeze the plan from future service accruals effective January 1, 2023. This amendment resulted in a $119 million gain recognized in “Other operating gains, net” within the consolidated income statement, reflecting a reduction of the TRGP defined benefit obligation. In 2019, curtailment gains of $8 million were recognized in “Other operating gains, net” reflecting reductions in the number of employees accruing service under various defined benefit plans. Net defined benefit plan obligations The movement on net defined benefit plan obligations was as follows: Pension Plans (1) OPEB (1) Total (1) 2020 2019 2020 2019 2020 2019 As of January 1 (510) (589) (119) (112) (629) (701) Plan income (expense) recognized in income statement: 43 (67) (3) (13) 40 (80) Actuarial gains (losses) 60 (49) 18 (4) 78 (53) Exchange differences 5 1 2 - 7 1 Contributions paid 28 195 6 8 34 203 Disposals of businesses - - - 1 - 1 Other 2 (1) (2) 1 - - Net plan obligations as of December 31 (372) (510) (98) (119) (470) (629) Net plan surpluses recognized in non-current assets 128 85 Net plan obligations recognized in non-current liabilities (598) (714) (1) Includes amounts for immaterial defined benefit and OPEB plans that are not included in the detailed analysis below. Analysis of material defined benefit plans The following analysis relates to the Company’s most significant defined benefit plans, the largest of which are in the U.S. and the U.K. The net surpluses (obligations) of the material defined benefit plans recognized in the consolidated statement of financial position were as follows: Funded Unfunded (1) OPEB Total As of December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Present value of plan obligations (3,915) (3,628) (317) (299) (75) (102) (4,307) (4,029) Fair value of plan assets 3,867 3,428 - - - - 3,867 3,428 Net plan obligations (48) (200) (317) (299) (75) (102) (440) (601) Net plan surpluses 125 83 - - - - 125 83 Net plan obligations (173) (283) (317) (299) (75) (102) (565) (684) (1) Unfunded pension plans consist of SERPs for eligible employees. Defined benefit obligation The following summarizes activity in the defined benefit obligation: Present Value of Defined Benefit Obligations Funded Unfunded OPEB Total As of December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Opening defined benefit obligation (3,628) (3,164) (299) (279) (102) (104) (4,029) (3,547) Current service cost (44) (39) (1) (2) - (1) (45) (42) Administration fees (7) (11) (1) (1) - - (8) (12) Interest cost (103) (119) (9) (12) (3) (4) (115) (135) Actuarial losses from changes in financial assumptions (1) (406) (497) (20) (27) (10) (8) (436) (532) Actuarial gains from changes in demographic assumptions 23 52 2 4 1 1 26 57 Experience (losses) gains (2) (20) 1 (3) (4) 28 6 5 3 Contributions by employees (1) (1) - - (2) (2) (3) (3) Benefits paid 190 172 20 22 8 10 218 204 Administration fees disbursements 7 11 - - - - 7 11 Curtailment gain - 8 - - - - - 8 Plan amendments (3) 119 - (4) - - - 115 - Exchange differences (43) (42) (2) (1) - - (45) (43) Other (2) 1 - 1 5 - 3 2 Closing defined benefit obligation (3,915) (3,628) (317) (299) (75) (102) (4,307) (4,029) (1) Losses in 2020 and 2019 were primarily associated with a decrease in discount rates used to measure the obligation. (2) In 2020, OPEB experience gains reflect lower costs due to transition of the U.S. retiree medical plan from self-insured to an insurance company. (3) In 2020, gains primarily relate to a plan amendment to freeze the TRGP from future service accruals effective January 1, 2023. The total closing defined benefit obligation can be further analyzed by participant group and by geography. As of December 31, 2020 2019 As of December 31, 2020 2019 Active employees 27% 30% U.S. 69% 70% Deferred 35% 33% U.K. 27% 26% Retirees 38% 37% Rest of world 4% 4% Closing defined benefit obligation 100% 100% 100% 100% The weighted-average duration of plan obligations for the TRGP and TTC in 2020 were 17 years (2019 – 17 years) and 18 years (2019 – 18 years), respectively. Plan assets The following summarizes activity in plan assets: Fair Value of Plan Assets Funded Unfunded OPEB Total As of December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Opening fair value of plan assets 3,428 2,857 - - - - 3,428 2,857 Interest income (1) 94 110 - - - - 94 110 Return on plan assets excluding amounts included in interest income (2) 482 424 - - - - 482 424 Contributions by employer 7 173 20 22 6 8 33 203 Contributions by employees 1 1 - - 2 2 3 3 Benefits paid (190) (172) (20) (22) (8) (10) (218) (204) Administration fees disbursements (7) (11) - - - - (7) (11) Exchange differences 51 43 - - - - 51 43 Other 1 3 - - - - 1 3 Closing fair value of plan assets 3,867 3,428 - - - - 3,867 3,428 (1) Interest income is calculated using the discount rate for the period. (2) Return on plan assets represents the difference between the actual return on plan assets and the interest income computed using the discount rate. Investment policy of funded plans Plan assets are invested to adequately secure benefits and to minimize the Company’s long-term contributions to the plans. However, specific investment allocations will vary across plans. The Company funds unfunded and OPEB plans as claims are made. Plan fiduciaries, comprised of the Company or plan trustees, set investment policies and strategies for each funded plan and oversee investment allocation, which includes selecting investment managers, commissioning periodic asset-liability studies and setting long-term strategic targets. Investment allocation takes into consideration a number of factors, including the funded status of the plan, a balance between risk and return, the plan’s liquidity needs, current and expected economic and market conditions, specific asset class risk as well as the risk profile and maturity pattern of the respective plan. Target investment allocation ranges are guidelines, not limitations. Funded plans may have broadly diversified portfolios with investments in equities, fixed income, real estate, insurance contracts, derivatives and other asset classes through direct ownership or through other instruments such as mutual funds, commingled funds and hedge funds. Derivatives may be used to achieve investment objectives or as a component of risk management such as for interest rate and currency management strategies. In aggregate, the major categories of plan assets for funded plans were as follows: Quoted (1) Unquoted Total As of December 31, 2020 2019 2020 2019 2020 2019 Equities (2) U.S. 157 144 65 50 222 194 U.K. 3 6 - - 3 6 All other 109 92 526 479 635 571 Total Equities 269 242 591 529 860 771 Bonds (3) Corporate U.S. 226 201 791 698 1,017 899 U.K. - - - 149 - 149 All other 3 2 109 54 112 56 Government U.S. 3 2 631 552 634 554 All other 4 3 13 11 17 14 Other fixed income 73 68 183 112 256 180 Total Bonds 309 276 1,727 1,576 2,036 1,852 Multi-asset (4) U.K. - 7 - - - 7 All other 1 - 134 133 135 133 Total Multi-asset 1 7 134 133 135 140 Property 4 2 - - 4 2 Insurance - - 36 38 36 38 Derivatives - - 679 266 679 266 Cash and cash equivalents 12 11 97 341 109 352 Other 1 1 7 6 8 7 Total 596 539 3,271 2,889 3,867 3,428 (1) Asset valuation based on Level 1 evidence under the fair value hierarchy: quoted prices (unadjusted) in active markets for identical assets or liabilities. (2) Equities include direct shareholdings and funds focused on equity strategies. (3) Bonds include direct credit holdings and funds focused on fixed income strategies. Within this grouping, Government includes debt issued by national, state and local government agencies and Other fixed income includes blended Corporate/Government credit strategies. (4) Multi-asset includes funds that invest in a range of asset classes. As of December 31, 2020 and 2019, there were no Thomson Reuters securities held in the Company’s pension plans’ assets. Contributions In 2020, the Company contributed $33 million to its material defined benefit plans. In 2019, the Company contributed $203 million to its material defined benefit plans including $167 million that was contributed to the TTC plan in February 2019 to satisfy U.K. pension law funding obligations arising from the sale of the Financial & Risk business. In 2021, the Company expects to contribute approximately $39 million to its material defined benefit plans, $6 million in accordance with the normal funding policy of funded plans and $33 million for claims expected to arise under unfunded and OPEB plans. From time to time, the Company may elect to make voluntary contributions to improve the funded status of the plans. For certain plans, the trustees have the right to call for special valuations, which could subsequently result in the Company having to make an unexpected contribution. Market-related factors may also affect the timing and amount of contributions. The amount and timing of any future required contributions to pension plans could differ significantly from the Company’s estimates at December 31, 2020. Actuarial assumptions The weighted-average actuarial assumptions were as follows: Funded Unfunded OPEB As of December 31, 2020 2019 2020 2019 2020 2019 Discount rate 2.22% 2.94% 2.59% 3.31% 2.05% 3.03% Inflation assumption 2.78% 3.19% 2.71% 2.37% - - Rate of increase in salaries 3.48% 3.44% 1.75% 3.50% 3.50% 3.40% Rate of increase in pension payments 2.79% 3.03% 2.75% 3.05% - - Medical cost trend - - - - 7.50% 6.25% Discount rate The discount rate was based on current market interest rates of high-quality, fixed-rate debt securities adjusted to reflect the duration of expected future cash outflows for pension benefit payments. To estimate the discount rate, the Company used a hypothetical yield curve that represented yields on high quality zero-coupon Rates of inflation, increase in salaries and pension payments The rate of inflation, which impacts increases in eligible U.K. pension payments, was determined by reference to consumer and retail price indices. For the TTC plan, a 0.25% increase or decrease in the rate of increase in pension payments would have increased or decreased the defined benefit obligation by approximately $25 million. Given the freezing of the TRGP plan effective January 1, 2023, the rate of increase in salaries assumption no longer has a material impact on the defined benefit obligation sensitivity analysis. Medical cost trend The medical cost trend is based on the Company’s actuarial medical claims experience and future projections of medical costs. The average medical cost trend rate used was 7.5% for 2020, which is reduced gradually to 4.8% in 2032. A 1% increase or decrease in the trend rate would have resulted in an increase or decrease in the benefit obligation for post-retirement benefits of approximately $6 million at December 31, 2020. Mortality assumptions The mortality assumptions used to assess the defined benefit obligation as of December 31, 2020 are based on the following: · TRGP: Pri 2012/MP-2020 · TTC plan: SAPS S3 Light Tables with allowances for plan demographic specifics and longevity improvements. The following table illustrates the life expectation in years of an average plan participant retiring at age 65 as of December 31, 2020 and 2019 and a plan participant at age 40 as of December 31, 2020 and 2019 retiring 25 years later at age 65 under the mortality assumptions used. December 31, 2020 Life Expectation in Years Male Female Employee retiring as of December 31, 2020 at age 65 21 23 Employee age 40 as of December 31, 2020 retiring at age 65 23 24 December 31, 2019 Life Expectation in Years Male Female Employee retiring as of December 31, 2019 at age 65 22 23 Employee age 40 as of December 31, 2019 retiring at age 65 24 25 For the TRGP and the TTC plans combined, an increase in life expectancy of one year across all age groups would have increased the defined benefit obligation by approximately $100 million as of December 31, 2020. The sensitivity analyses are based on a change in one assumption while holding all other assumptions constant, so that interdependencies between assumptions are excluded. The measurement methodology (i.e. present value of the obligation calculated using the projected unit credit method) applied in the sensitivity analyses is also consistent to that used to determine the defined benefit obligation in the consolidated statement of financial position. Risks and uncertainties The material risks and uncertainties the Company is exposed to in relation to defined benefit pension plans are: · Investment risk: · Interest rate risk: · Inflation risk: · Currency risk: · Liquidity risk: · Mortality risk: For defined benefit retiree medical plans, the material risks are mortality risk, as described above, and costs being greater than assumed, either due to inflation of future medical costs or the frequency of participants’ claims. Analysis of income and expense Defined benefit plan (income) expense for material defined benefit plans for years ended December 31, 2020 and 2019 was as follows: Income Statement (1) Funded Unfunded OPEB Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Current service cost 44 39 1 2 - 1 45 42 Net interest cost 9 9 9 12 3 4 21 25 Administration fees 7 11 1 1 - - 8 12 Curtailment gain - (8) - - - - - (8) Plan amendments (2) (119) - 4 - - - (115) - Defined benefit plan (income) expense (59) 51 15 15 3 5 (41) 71 (1) Current service cost and administration fees are included in the “Post-employment benefits” component of “Operating expenses” as set out in note 5. Net interest cost is reported in “Finance costs, net” as set out in note 7. (2) Related to the TRGP amendment to freeze the plan from future service accruals effective January 1, 2023. Analysis of other comprehensive (income) loss The following summarizes amounts recognized in other comprehensive (income) loss for material defined benefit plans: Other Comprehensive (Income) Loss Funded Unfunded OPEB Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Remeasurement losses (gains) on defined benefit obligation: Due to financial assumption changes 406 497 20 27 10 8 436 532 Due to demographic assumption changes (23) (52) (2) (4) (1) (1) (26) (57) Due to experience 20 (1) 3 4 (28) (6) (5) (3) Return on plan assets greater than discount rate (482) (424) - - - - (482) (424) Total recognized in other comprehensive (income) loss before taxation (79) 20 21 27 (19) 1 (77) 48 Accumulated Comprehensive Loss (Income) Funded Unfunded OPEB Total 2020 2019 2020 2019 2020 2019 2020 2019 Balance of accumulated comprehensive loss (income) at January 1 1,391 1,371 82 55 (87) (88) 1,386 1,338 Net actuarial (gains) losses recognized in the year (79) 20 21 27 (19) 1 (77) 48 Total accumulated comprehensive loss (income) at December 31, 1,312 1,391 103 82 (106) (87) 1,309 1,386 Defined contribution plans The Company sponsors various defined contribution savings plans that provide for Company matching contributions. Total expense related to defined contribution plans was $78 million in 2020 (2019—$75 million), which approximates the cash outlays related to the plans.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
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Leases	Note 27: Leases Lessee In the ordinary course of business, the Company enters leases primarily for property and equipment. The carrying amount and the related depreciation for the right-of-use Land, Buildings Computer Furniture, Fixtures Total Year ended December 31, 2020 Carrying amount 171 49 2 222 Depreciation 67 22 1 90 Year ended December 31, 2019 Carrying amount 213 40 1 254 Depreciation 52 1 1 54 Expenses related to short-term leases were $6 million and $27 million and were recognized in the consolidated income statement for the years ending December 31, 2020 and 2019, respectively. For the years ending December 31, 2020 and 2019, cash outflows for leases, which include payments of lease principal, interest, short-term and low value leases, were $96 million and $88 million, respectively. The following table sets forth the Company’s future aggregate undiscounted non-cancellable lease payments over the lease term as well as its discounted lease liabilities as reported in the consolidated statement of financial position as of December 31, 2020 and 2019: December 31, 2020 2019 Within 1 year 92 80 Between 1 and 2 years 76 75 Between 2 and 3 years 49 60 Between 3 and 4 years 39 41 Between 4 and 5 years 29 34 Later than 5 years 44 64 Total undiscounted cash flows 329 354 Lease liabilities included in the consolidated statement of financial position Current 83 69 Non-current 223 253 As of December 31, 2020 and 2019, the Company was committed to leases with future cash outflows totaling $134 million and $190 million, respectively, which had not yet commenced and therefore are not accounted for as a liability as of December 31, 2020 and 2019, respectively. A liability and corresponding right-of-use With certain leases, the Company guarantees the restoration of the leased property to a specified condition after completion of the lease period. The liability associated with these restorations is recorded within “Provisions and other non-current Lessor The Company may act as a sub-lessor Operating lease income of $20 million and $10 million was recognized in the consolidated income statement for the years ending December 31, 2020 and 2019, respectively. The Company is entitled to receive the following aggregate undiscounted payments for finance leases as of December 31, 2020 and 2019: December 31, 2020 2019 Within 1 year 8 9 Between 1 and 2 years 7 8 Between 2 and 3 years 7 7 Between 3 and 4 years 7 6 Between 4 and 5 years 5 7 Later than 5 years 2 7 Total undiscounted lease payments to be received 36 44 Unearned finance income (3) (4) Net investment in leases 33 40

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2020
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Supplemental Cash Flow Information	Note 28: Supplemental Cash Flow Information Details of “Other” in the consolidated statement of cash flow are as follows: Year ended December 31, 2020 2019 Non-cash employee benefit charges 160 157 Net (gains) losses on foreign exchange and derivative financial instruments (28) 47 Share of post-tax losses in equity method investments 544 599 Revaluation of Refinitiv warrants (see note 6) (82) (419) Fair value adjustments (10) - Other (1) (163) 1 421 385 (1) Includes $119 million gain related to an amendment to the Company’s U.S. pension plan. See note 26. Details of “Changes in working capital and other items” are as follows: Year ended December 31, 2020 2019 Trade and other receivables 29 116 Prepaid expenses and other current assets 8 25 Other financial assets 2 (17) Payables, accruals and provisions (133) (220) Deferred revenue 19 (10) Other financial liabilities (2) 17 Income taxes 250 (71) Other (71) (87) 102 (247) Details of income taxes (paid) received are as follows: Year ended December 31, 2020 2019 Operating activities - continuing operations (52) (268) Operating activities - discontinued operations 2 (45) Investing activities - continuing operations (114) (1) Total income taxes paid (164) (314)

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2020
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Acquisitions	Note 29: Acquisitions Acquisitions primarily comprise the purchase of businesses that are integrated into existing operations to broaden the Company’s range of offerings to customers as well as its presence in global markets. The results of acquired businesses are included in the consolidated financial statements from the dates of acquisition. Acquisitions also included investments in equity method investments and asset acquisitions. Acquisition activity The number of acquisitions completed, and the related total consideration during 2020 and 2019 were as follows: Year ended December 31, 2020 2019 Number of Cash Number of Cash Businesses acquired 2 166 4 1,049 Less: Cash acquired (4) (59) Businesses acquired, net of cash 2 162 4 990 Investments in businesses - 1 - 4 Contingent consideration payments 4 - Asset acquisitions - - 1 4 2 167 5 998 The following describes some of the acquisitions completed during 2020 and 2019: Date Company Acquiring Segments Description March 2020 Pondera Solutions Legal Professionals A provider of technology and advanced analytics to combat fraud, waste and abuse in healthcare and large government programs. August 2020 CaseLines Legal Professionals A provider of a cloud-based, evidence sharing platform that allows courts, law enforcement, prosecutors and legal practitioners to digitally collaborate, share and participate in virtual and physical court proceedings. July 2019 Confirmation Tax & Accounting Professionals/Corporates A provider of digital audit confirmation services to accounting firms, banks and law firms. July 2019 HighQ Legal Professionals/Corporates A provider of collaboration tools to the legal and regulatory market segments. October 2019 FC Business Intelligence Reuters News A global business-to-business Purchase price allocations related to certain acquisitions may be subject to adjustment pending completion of final valuations. The details of net assets acquired were as follows: Year ended December 31, 2020 2019 Cash and cash equivalents 4 59 Trade receivables 4 13 Prepaid expenses and other current assets 1 7 Current assets 9 79 Property and equipment - 7 Computer software 25 78 Other identifiable intangible assets 23 309 Total assets 57 473 Payables and accruals (7) (29) Deferred revenue (6) (25) Other financial liabilities (2) (1) Current liabilities (15) (55) Provisions and other non-current liabilities (2) (5) Deferred tax (7) (79) Total liabilities (24) (139) Net assets acquired 33 334 Goodwill 133 715 Total 166 1,049 The excess of the purchase price over the net assets acquired was recorded as goodwill and reflects synergies and the value of the acquired workforce. The majority of goodwill for acquisitions completed in 2020 and 2019 is not expected to be deductible for tax purposes. Acquisition transactions were completed by acquiring all equity interests or the net assets of the acquired business. Other The revenues and operating profit of acquired businesses since the date of acquisition were not material to the Company’s results of operations.

Contingencies, Commitments and

Contingencies, Commitments and Guarantees	12 Months Ended
	Dec. 31, 2020
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Contingencies, Commitments and Guarantees	Note 30: Contingencies, Commitments and Guarantees Lawsuits and legal claims The Company is engaged in various legal proceedings, claims, audits and investigations that have arisen in the ordinary course of business. These matters include, but are not limited to, employment matters, commercial matters, defamation claims and intellectual property infringement claims. The outcome of all of the matters against the Company is subject to future resolution, including the uncertainties of litigation. Based on information currently known to the Company and after consultation with outside legal counsel, management believes that the ultimate resolution of any such matters, individually or in the aggregate, will not have a material adverse impact on the Company’s financial condition taken as a whole. Uncertain tax positions The Company is subject to taxation in numerous jurisdictions and is routinely under audit by many different taxing authorities in the ordinary course of business. There are many transactions and calculations during the course of business for which the ultimate tax determination is uncertain, as taxing authorities may challenge some of the Company’s positions and propose adjustments or changes to its tax filings. As a result, the Company maintains provisions for uncertain tax positions that it believes appropriately reflect its risk. These provisions are made using the Company’s best estimates of the amount expected to be paid based on a qualitative assessment of all relevant factors. When appropriate, the Company performs an expected value calculation to determine its provisions. The Company reviews the adequacy of these provisions at the end of each reporting period and adjusts them based on changing facts and circumstances. Due to the uncertainty associated with tax audits, it is possible that at some future date, liabilities resulting from such audits or related litigation could vary significantly from the Company’s provisions. However, based on currently enacted legislation, information currently known by the Company and after consultation with outside tax advisors, management believes that the ultimate resolution of any such matters, individually or in the aggregate, will not have a material adverse impact on the Company’s financial condition taken as a whole. In February 2018, the U.K. tax authority, HM Revenue & Customs (“HMRC”), issued notices of assessment under the Diverted Profits Tax (“DPT”) regime for the 2015 taxation year of certain of the Company’s current and former U.K. affiliates. The Company paid $31 million in tax, as required under the notices. As management does not believe that these U.K. affiliates fall within the scope of the Diverted Profits Tax regime, the Company appealed these assessments in July 2019 to obtain a refund. HMRC has opened audit enquiries of subsequent taxation years and in February 2021 issued final DPT notices for the 2016 taxation year aggregating $90 million, which the Company is required to pay in March 2021. In addition, based on recent discussions with HMRC, management believes it is reasonably possible that HMRC may issue similar notices in the next 6 to 12 months for one or more other taxation years, largely related to businesses that the Company has sold and that are subject to indemnity arrangements. If that occurs, the Company will be required to pay additional taxes to HMRC, including those attributable to the indemnity counterparty, shortly thereafter. If the Company is required to make any additional tax payments, which could be as much as $600 million to $700 million, it intends to vigorously defend its position by contesting the assessments through all available administrative and judicial remedies. The large majority of the anticipated amounts in dispute relates to the Company’s Financial & Risk business, which was divested in 2018. Any payment made by the Company would not be a reflection of its view on the merits of the case. Because management believes that its position is supported by the weight of law, it does not believe that the resolution of this matter will have a material adverse effect on the Company’s financial condition taken as a whole. As a result, the Company would expect to record substantially all of any potential future payments as non-current Dispositions In certain disposition agreements, the Company guarantees to the purchaser the recoverability of certain assets or limits on certain liabilities, including as in the “Uncertain tax positions” section above. The Company does not believe based upon current facts and circumstances described that additional payments in connection with these transactions would have a material adverse impact on the Company’s financial condition taken as a whole. Unconditional purchase obligations The Company has various obligations for materials, supplies, outsourcing and other services contracted in the ordinary course of business. The future unconditional purchase obligations as of December 31, 2020 and 2019 are as follows: December 31, 2020 2019 Within 1 year 316 300 Between 1 and 2 years 277 219 Between 2 and 3 years 242 180 Between 3 and 4 years 71 160 Between 4 and 5 years 13 62 Later than 5 years - 1 919 922

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2020
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Related Party Transactions	Note 31: Related Party Transactions As of December 31, 2020, the Company’s principal shareholder, The Woodbridge Company Limited (“Woodbridge”), beneficially owned approximately 66% of the Company’s common shares. Transactions with Woodbridge From time to time, in the normal course of business, the Company enters into transactions with Woodbridge and certain of its affiliates. These transactions involve providing and receiving product and service offerings and are not material to the Company’s results of operations or financial condition either individually or in the aggregate. Transactions with Refinitiv In October 2018, the Company sold a 55% interest in its former Financial & Risk business to private equity funds affiliated with Blackstone, and retained a 45% interest in the company, which is now known as Refinitiv. As part of the transaction, Reuters News and Refinitiv have an agreement pursuant to which Reuters News supplies news and editorial content to Refinitiv for a minimum amount of revenues through October 1, 2048. In 2020 and 2019, the Company recorded $336 million of revenues under this agreement, which represent the current minimum annual value. However, these revenues may increase further as the contract requires adjustments related to changes in the consumer price index and foreign exchange rates. For the duration of the agreement, Refinitiv may also license the “Reuters” mark to brand its products and services, subject to certain contractual restrictions. For the year ended December 31, 2020, the Company recorded $24 million of income in “Other operating gains, net” within the consolidated income statement under this license (2019 – $23 million). Additionally, the Company and Refinitiv sell products and services to each other in the normal course of business. These transactions are not significant to the Company’s results of operations or financial condition either individually or in the aggregate. To facilitate the separation, the Company and Refinitiv agreed to provide certain operational services to each other, including technology and administrative services, for a specified multi-year period. Additionally, the Company and Refinitiv extended property leases to each other, including the 3 Times Square property in New York, New York, which the Company leases from Refinitiv. For the years ended December 31, 2020 and 2019, the Company recorded the following amounts as expense or contra-expense, as applicable, related to these transactions: Provided by Thomson Reuters to Refinitiv Contra-expense Provided by Refinitiv to Thomson Reuters (Expense) Year ended December 31, Year ended December 31, 2020 2019 2020 2019 Transitional services 8 26 (15) (52) Properties leased 23 39 (13) (34) As of December 31, 2020, the Company owed $59 million (2019 – $79 million) to Refinitiv under non-cancellable leases and Refinitiv owed the Company $15 million (2019 – $56 million) under non-cancellable lease agreements (see note 27). At December 31, 2020, the consolidated statement of financial position included a receivable from Refinitiv of $112 million (2019 – $135 million) and a payable to Refinitiv of $100 million (2019 – $102 million) related to all transactions between the two companies. Transactions with other associates and joint ventures From time to time, the Company enters transactions with its investments in other associates and joint ventures. These transactions typically involve providing or receiving services in the normal course of business and are not material to the Company’s results of operations or financial condition either individually or in the aggregate. Compensation of key management personnel Key management personnel compensation, including directors, was as follows: Year ended December 31, 2020 2019 Salaries and other benefits 41 60 Share-based payments 16 20 Total compensation 57 80 Key management personnel are comprised of the Company’s directors and executive officers.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2020
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Subsequent Events	Note 32: Subsequent Events Sale of Refinitiv to LSEG On January 29, 2021, the Company and private equity funds affiliated with Blackstone closed the sale of Refinitiv to LSEG in an all share transaction. As of the closing date, the Company indirectly owned approximately 82.5 million LSEG shares, which had a market value of approximately $9.8 billion based on LSEG’s closing share price on January 28, 2021. The Company’s interest in LSEG shares are held through an entity jointly owned with Blackstone’s consortium. Subject to certain exceptions, the Company and Blackstone’s consortium have otherwise The Company expects to record a pre-tax post-tax post-tax 2021 dividends In February 2021, the Company announced a $0.10 per share increase in the annualized dividend to $1.62 per common share, which was approved by the Company’s board of directors. A quarterly dividend of $0.405 per share will be paid on March 17, 2021 to shareholders of record as of March 5, 2021.

Summary of Business and Signi_2

Summary of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
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Basis of preparation 1	Basis of preparation These consolidated financial statements were prepared in accordance with International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board (“IASB”), on a going concern basis, under the historical cost convention, as modified by the revaluation of financial assets and financial liabilities (including derivative instruments) at fair value. The preparation of financial statements in accordance with IFRS requires the use of certain critical accounting estimates. It also requires management to exercise judgment in applying the Company’s accounting policies. The areas involving more judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements are disclosed in note 2.
Basis of Presentation 2	In the first quarter of 2020, the Company re-assessed Year ended December 31, 2019 As Reported Adjustments As Revised Revenues Legal Professionals 2,419 14 2,433 Corporates 1,321 (13) 1,308 Tax & Accounting Professionals 844 (1) 843 Reuters News 630 - 630 Global Print 693 - 693 Eliminations/Rounding (1) - (1) Total revenues 5,906 - 5,906 Adjusted EBITDA Legal Professionals 901 (6) 895 Corporates 433 (21) 412 Tax & Accounting Professionals 323 (5) 318 Reuters News 35 33 68 Global Print 295 (1) 294 Corporate costs (494) - (494) Total adjusted EBITDA 1,493 - 1,493 References to “$” are to U.S. dollars, references to “C$” are to Canadian dollars, references to “£” are to British pounds sterling and references to “ €
Changes in accounting policy	Changes in accounting policies Effective January 1, 2019, the Company adopted IFRS 16, Leases
Principles of consolidation	Principles of consolidation The consolidated financial statements of the Company include the accounts of all of its subsidiaries. Subsidiaries Subsidiaries are entities over which the Company has control, where control is defined as the power to govern financial and operating policies. Generally, the Company has a shareholding of more than 50% of the voting rights in its subsidiaries. The effect of potential voting rights that are currently exercisable are considered when assessing whether control exists. Subsidiaries are fully consolidated from the date control is transferred to the Company, and are de-consolidated The acquisition method of accounting is used to account for the acquisition of subsidiaries as follows: · Acquisition cost is measured as the fair value of the assets given, equity instruments issued, and liabilities incurred or assumed at the date of exchange, excluding transaction costs which are expensed as incurred; · Identifiable assets acquired and liabilities assumed are measured at their fair values at the acquisition date; · The excess of acquisition cost over the fair value of the identifiable net assets acquired is recorded as goodwill; · If the acquisition cost is less than the fair value of the net assets acquired, the fair value of the net assets is re-assessed, · Contingent consideration is measured at fair value on the acquisition date, with subsequent changes in the fair value recorded through the consolidated income statement when the contingent consideration is a financial liability. Contingent consideration is not re-measured · Upon gaining control in a step acquisition, the existing ownership interest is re-measured Intercompany transactions between subsidiaries are eliminated in consolidation. Non-controlling Non-controlling Equity method investees Equity method investees are entities over which the Company has significant influence, but not control, and includes joint ventures, where the Company has joint control with one or more unaffiliated entities. Generally, the Company has a shareholding of between 20% and 50% of the voting rights in its equity method investees. Investments in equity method investees are accounted for using the equity method as follows: · Investments are initially recognized at cost and are reported in the consolidated statement of financial position; · Equity method investees include goodwill identified on acquisition, net of any accumulated impairment loss; · The Company’s share of post-acquisition profits or losses is recognized in the consolidated income statement and the Company’s share of other comprehensive income or losses is recognized in the consolidated statement of comprehensive income, and both are adjusted against the carrying amount of the investments; · When the Company’s share of losses equals or exceeds its interest in the investee, the Company does not recognize further losses, unless it has incurred obligations or made payments on behalf of the investee; · Gains and losses on transactions between the Company and its equity method investees are eliminated to the extent of the Company’s interest in these entities; · Dividends received or a receivable from equity method investees are recognized as a reduction in the carrying amount of the investment; and · Equity method investees are assessed for impairment whenever events or changes in circumstances indicate that their carrying value may not be recoverable and at the end of each reporting period for indicators of impairment. Upon loss of significant influence, any retained interest in the investee is remeasured to its fair value with the change in carrying amount recognized in other operating gains or losses in the consolidated income statement. The accounting policies of subsidiaries and equity method investees were changed where necessary to ensure consistency with the Company’s policies.
Operating segments	Operating segments The Company’s operating segments are organized around the customers it serves and are reported in a manner consistent with the internal reporting provided to the chief operating decision-maker (“CODM”). The Chief Executive Officer has authority for resource allocation and assessment of the Company’s performance and is therefore the CODM.
Foreign currency	Foreign currency The consolidated financial statements are presented in U.S. dollars, which is the Company’s presentation currency. The financial statements of each of the Company’s subsidiaries are measured using the currency of the primary economic environment in which the subsidiary operates (the “functional currency”). · Assets and liabilities of entities with functional currencies other than U.S. dollars are translated to U.S. dollars at the period end rates of exchange, and the results of their operations are translated at average rates of exchange for the period. The resulting translation adjustments are included in accumulated other comprehensive loss in shareholders’ equity. For entities operating in countries where the currency has been designated as hyperinflationary, the assets, liabilities and results of their operations are translated at the period end rates of exchange, after re-indexing · Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the dates of the transaction. Foreign exchange gains and losses resulting from the settlement of such transactions as well as from the translation of monetary assets and liabilities not denominated in the functional currency of the subsidiary, are recognized in the consolidated income statement, except for qualifying cash flow hedges which are deferred in accumulated other comprehensive loss in shareholders’ equity. · Foreign exchange gains and losses arising from borrowings and related hedging instruments, cash and cash equivalents and intercompany loans that are not permanent in nature are presented in the consolidated income statement within “Finance costs, net”. · Foreign exchange gains and losses related to certain intercompany loans that are permanent in nature are included in accumulated other comprehensive loss. · All other foreign exchange gains and losses are presented in the consolidated income statement within “Operating expenses”. Accumulated foreign exchange gains and losses are recycled from accumulated other comprehensive loss to “Other operating gains (losses), net” or to discontinued operations, as applicable, within the consolidated income statement upon loss of control, significant influence or joint control of the applicable entity, including foreign exchange amounts relating to settled intercompany loans that had previously been considered permanent.
Revenue recognition	Revenue recognition Revenues are recognized when control of the Company’s products or services are transferred to customers. The amount of revenues recognized reflects the consideration to which the Company expects to be entitled. Such consideration is net of estimated returns, discounts, value-added and other sales taxes. The Company derives its revenues from selling information, software and services. Revenues are generally recognized as follows: Recurring revenues Recurring revenues are generally recognized on a ratable basis over the contract term. Recurring revenues primarily consist of fees to access products or services delivered electronically over time, such as Westlaw and Checkpoint. These products are generally provided under subscription arrangements, which most customers renew at the end of each subscription term. Most subscription arrangements have multiple year terms that range from one to five years. Recurring revenues also include fees from software maintenance arrangements that are recognized over the maintenance period. Arrangements may be billed in advance or in arrears. Transactions revenues Transactions revenues are recognized primarily at a point in time and based on their type, as follows: · Volume-based fees related to online searches are recognized based on usage; · Fees from software licenses with no future obligations are recognized at the point of delivery; and · Professional fees from service and consulting arrangements are recognized as services are performed, generally based on hours incurred, reflecting the continuous transfer of control to the customer. Transactions revenues may be billed in advance or in arrears. Print revenues Print revenues that are sold under subscription agreements, which provide access to a library of print products as well as updates released during the subscription term, are generally recognized on a ratable basis over the contract term and may be billed in advance or in arrears. Revenues for print products that are not sold as part of a subscription arrangement are recognized at the point of shipment and billed at the same time. Print revenues consist of fees for content that is delivered primarily in traditional paper format. The Company also considers the following when recognizing revenues: Multiple performance obligations Certain customer contracts include multiple products and services, which are accounted for as separate performance obligations when they are distinct. A product or service is distinct if a customer can benefit from it either on its own or with other readily available resources, and the promise to transfer the good or service is separately identifiable in the contract. The transaction price is allocated to the separate performance obligations based on the relative standalone selling price. A series of distinct goods or services is accounted for as a single performance obligation if the items in the series are substantially the same, have the same pattern of transfer and: (1) each distinct item in the series represents a performance obligation that would be satisfied over time, and (2) the measure to satisfy the performance obligation for each distinct item in the series is the same. Certain arrangements include installation or implementation services. If these services are distinct, consideration is allocated to them and they are recognized as services are performed and included as transaction revenues. If the services are not distinct, they are recognized as part of the related subscription arrangement or as part of the related software license, as applicable. Sales involving third parties Revenues from sales of third-party content or services delivered on the Company’s platforms are recorded gross when the Company is a principal to the transaction, and net of costs when the Company is acting as an agent between the customer and the vendor. The Company considers several factors to determine whether it is acting as principal or an agent, most notably whether it is primarily responsible for (1) fulfilling the promise to provide the content or services, (2) setting the price, and (3) the credit risk for the amount billed to the customer. Deferred revenue Deferred revenue, a contract liability, is recorded when cash payments are received or due in advance of the transfer of the related products or services. Contract costs Incremental costs of obtaining a contract with a customer are recognized as an asset if the benefit of such costs is expected to be longer than one year, and amortized on a straight-line basis over the period that the product or service is transferred to the customer. Incremental costs include sales commissions to direct sales people as well as to account executives and sales management. Sales commissions on new customer contracts are generally paid at significantly higher rates than renewals. As such: · Assets related to new customer contracts are amortized over three years, which may anticipate renewal periods, as management estimates that this corresponds to the period over which a customer benefits from existing technology in the underlying product or service; and · Assets related to renewal of customer contracts are amortized over the term of the contract if they are commensurate with previous renewals commissions. The Company recognizes the following assets, “Deferred commissions” short-term, included within “Prepaid expenses and other current assets” and “Deferred commissions” long-term, included within “Other non-current The Company recognizes the incremental cost of obtaining a contract as an expense when incurred, if the amortization period is one year or less.
Employee future benefits	Employee future benefits The net periodic pension expense of defined benefit pension plans and other post-employment benefits is actuarially determined on an annual basis using the projected unit credit method. The determination of benefit expense requires assumptions such as the discount rate, which is used to measure service cost, benefit plan obligations and the net interest income (expense) on the net benefit plan assets (obligations). Other significant assumptions include expected mortality, the expected rate of increase with respect to future compensation and pension payments as well as the expected healthcare cost trend rate. Actual results will differ from results which are estimated based on assumptions. Past service cost arising from plan amendments is recognized immediately in the consolidated income statement. The asset or liability recognized in the consolidated statement of financial position is the present value of the defined benefit obligation at the end of the reporting period less the fair value of plan assets. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity approximating the terms of the related pension liability. All actuarial gains and losses that arise in calculating the present value of the defined benefit obligation and the fair value of plan assets are recognized immediately in retained earnings and included in the consolidated statement of comprehensive income. For funded plans, surpluses are recognized only to the extent that the surplus is considered recoverable. Recoverability is primarily based on the extent to which the Company can unilaterally reduce future contributions to the plan. Payments to defined contribution plans are expensed as incurred, which is as the related employee service is rendered.
Share-based compensation plans	Share-based compensation plans The Company operates equity-settled share-based compensation plans under which it receives services from employees as consideration for equity instruments of the Company. Share-based compensation expense is based on the grant date fair value of the awards expected to vest over the vesting period. The expense is recognized over the vesting period, which is the period over which the specified vesting conditions are satisfied. For awards with graded vesting, the fair value of each tranche is recognized over its respective vesting period. At the end of each reporting period, the Company re-assesses
Termination benefits	Termination benefits Termination benefits are generally payable when an employee is terminated before the normal retirement date or accepts voluntary redundancy. The associated charges are recognized when the Company can no longer withdraw the offer of termination benefits as follows: · Voluntary redundancy – recognized the earlier of when the employee accepts the offer and when the Company is restricted from withdrawing the offer; or · Involuntary termination – recognized when the Company has communicated to the affected employees a termination plan that is unlikely to change, describing (a) the type and amount of benefits, (b) the number, job classifications or functions and locations of employees to be terminated and (c) the plan’s expected completion date.
Profit sharing and bonus plans	Profit sharing and bonus plans Liabilities for profit sharing and bonuses are recognized based on a formula that takes into consideration various financial metrics after certain adjustments. The Company recognizes an accrual where contractually obliged or where there is a past practice that has created a constructive obligation to make such compensation payments.
Cash and cash equivalents	Cash and cash equivalents Cash and cash equivalents comprise cash on hand, demand deposits and investments with an original maturity at the date of purchase of three months or less.
Trade receivables	Trade receivables Trade receivables are amounts due from customers from providing services or the sale of goods in the ordinary course of business. Trade receivables are recognized initially at fair value and subsequently measured at amortized cost, less impairment. Trade receivables are classified as current assets if payment is due within one year or less. The Company maintains an allowance for doubtful accounts and sales adjustments to provide for impairment of trade receivables. The expense relating to doubtful accounts is included within “Operating expenses” in the consolidated income statement. Revenues are recorded net of sales adjustments.
Property and equipment	Property and equipment Property and equipment are recorded at cost and depreciated on a straight-line basis over their estimated useful lives as follows: Buildings and building improvements 10-40 years Computer equipment 3 years Furniture, fixtures and other equipment 5-7 Residual values and useful lives are reviewed at the end of each reporting period and adjusted if appropriate.
Intangible assets	Intangible assets Computer software Certain costs incurred in the development of software to be used internally or for providing services to customers are capitalized once a project has progressed beyond a conceptual, preliminary stage to that of application development. Development costs that are directly attributable to the design and testing of identifiable and unique software products controlled by the Company are recognized as intangible assets when the following criteria are met: · It is technically feasible to complete the software product so that it will be available for use; · Management intends to complete the software product and use or sell it; · There is an ability to use or sell the software product; · It can be demonstrated how the software product will generate probable future economic benefits; · Adequate technical, financial and other resources to complete the development and to use or sell the software product are available; and · The expenditure attributable to the software product during its development can be reliably measured. Costs that qualify for capitalization include both internal and external costs but are limited to those that are directly related to the specific project. The capitalized amounts, net of accumulated amortization, are included in “Computer software, net” in the consolidated statement of financial position. These costs are amortized over a three-year expected useful life. Amortization expense is included in “Amortization of computer software” in the consolidated income statement. Residual values and useful lives are reviewed at the end of each reporting period and adjusted if appropriate. Cloud computing arrangements In a cloud computing arrangement, the Company is granted a right to access software and other technology capabilities at a third-party provider through the internet. These arrangements typically do not allow the Company to acquire, take possession or control the underlying assets of the provider. Costs associated with cloud computing arrangements are generally expensed as incurred because they generally do not meet software capitalization criteria. The Company capitalizes costs to develop software that is hosted in the public cloud when: · It has the contractual right to take possession of the software from the cloud provider without significant penalty; and · It can demonstrate that it is feasible for the Company to run the software on its own hardware or that of another provider. The Company capitalizes costs to migrate software from on-premise Goodwill Goodwill represents the excess of the cost of an acquisition over the fair value of the Company’s share of the identifiable net assets of the acquired subsidiary or equity method investee at the date of acquisition. Goodwill is tested at least annually for impairment and carried at cost. Gains and losses on the disposal of an entity include an allocation of goodwill. Other identifiable intangible assets Upon acquisition, identifiable intangible assets are recorded at fair value and are carried at cost less accumulated amortization. Identifiable intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives as follows: Trade names 3-20 years Customer relationships 6-30 years Databases and content 5-30 Other 10-30 years Useful lives are reviewed at the end of each reporting period and adjusted if appropriate.
Impairment	Impairment When the recoverable amount of assets is less than their carrying amount, an impairment charge is recognized in the consolidated income statement. The recoverable amount is the higher of an asset’s fair value less costs of disposal or its value in use. Impairment losses, other than those relating to goodwill, are evaluated for potential reversals when events or changes in circumstances warrant such consideration. Intangible assets The carrying values of all intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable and at the end of each reporting period for indicators of impairment. Additionally, the carrying values of goodwill and identifiable intangible assets with indefinite lives are tested annually for impairment. For purposes of impairment testing: · Goodwill is allocated to cash-generating units (“CGUs”) or groups of CGUs based on the level at which management monitors it, which is not higher than an operating segment. Goodwill is allocated to those CGUs or groups of CGUs that are expected to benefit from the business combination in which the goodwill arose; and · Identifiable intangible assets with indefinite lives are allocated to the CGU with which they are associated, or compared to the excess fair value of all the CGUs if they are a corporate asset. Financial assets At the end of each reporting period, the Company assesses whether there is objective evidence that a financial asset is impaired. Non-financial The carrying value of a non-financial
Disposal of long-lived assets and discontinued operations	Disposal of long-lived assets and discontinued operations Long-lived assets are classified as held for sale if the carrying amount will be recovered principally through a sale transaction rather than through continued use and such sale is considered highly probable. The criteria for classification as held for sale include a firm decision by management or the board of directors to dispose of a business or a group of selected assets, an active marketing plan, and the expectation that such disposal will be completed within a 12-month · Represent a separate major line of business or geographical area of operations; · Are part of a single coordinated plan to dispose of a separate major line of business or geographical area of operations; or · Are a subsidiary acquired exclusively with a view to resale.
Trade payables	Trade payables Trade payables are obligations to pay for goods or services that have been acquired in the ordinary course of business. Trade payables are initially recognized at fair value and subsequently measured at amortized cost using the effective interest method. Trade payables are classified as current liabilities if payment is due within one year or less.
Provisions	Provisions Provisions represent liabilities of the Company for which the amount or timing is uncertain. Provisions are recognized when the Company has a present legal or constructive obligation due to past events, it is probable that an outflow of resources will be required to settle the obligation, and the amount can be reliably estimated. Provisions are not recognized for future operating losses. Provisions are measured at the present value of the expected expenditures to settle the obligation using a discount rate that reflects current market assessments of the time value of money and the risks specific to the obligation. The increase in the provision due to passage of time is recognized as interest expense.
Indebtedness	Indebtedness Debt is recognized initially at fair value, net of transaction costs. Debt is subsequently stated at amortized cost with any difference between the proceeds (net of transactions costs) and the redemption value recognized in the consolidated income statement over the term of the debt using the effective interest method. Where a debt instrument is in a fair value hedging relationship, a fair value adjustment is made to its carrying value to reflect hedged risk. Interest on indebtedness is expensed as incurred unless capitalized for qualifying assets in accordance with IAS 23, Borrowing Costs Debt is classified as a current liability unless the Company has an unconditional right to defer settlement for at least 12 months after the end of the reporting period.
Leases	Leases A contract is or contains a lease if it conveys the right to control the use of an identified asset for a specified period in exchange for consideration. When the Company leases assets from third parties, the Company is the lessee. When the Company leases assets to third parties, the Company is the lessor. Lessee At the lease commencement date, a right-of-use right-of-use The right-of-use non-current Right-of-use · The initial amount of the lease liability; · Lease payments made at or before the commencement date; and · Initial direct costs and expected restoration costs. Lease liabilities are measured as the present value of non-cancellable · Fixed payments (including in-substance · Variable lease payments that are based on an index or a rate (including inflation-linked payments); · Amounts expected to be payable by the lessee under residual value guarantees; · Exercise price of a purchase option if the lessee is reasonably certain to exercise that option; and · Penalty payments for terminating the lease, if the lease term reflects the lessee exercising that option. Where exercise of renewal or termination options is deemed reasonably certain, such assumptions are reflected in the valuation of the lease right-of-use re-assessed Lease payments are apportioned between the liability and a finance charge, which is reported within “Finance costs, net” in the consolidated income statement. The right-of-use Most of the Company’s leases are comprised of property leases, for which fixed payments covering lease and non-lease right-of-use Payments for leases with a term of 12 months or less and certain low-value Lessor Lessor arrangements are classified as finance leases when substantially all the risks and rewards of the underlying asset transfer to the lessee. A receivable, equal to the net investment in the lease, is recognized on the consolidated statement of financial position at the commencement date with an offset to the underlying asset. The receivable is measured as the present value of non-cancellable When the Company retains the risks and rewards of the underlying asset, the arrangement is classified as an operating lease. Payments received under operating leases are recognized as income on a straight-line basis over the lease term within “Operating expenses” in the consolidated income statement. The carrying value of the underlying asset is retained on the consolidated statement of financial position and amortized over the remaining term, determined as the shorter of the estimated useful life of the asset or the remaining lease term.
Financial assets	Financial assets Purchases and sales of financial assets are recognized on the settlement date, which is the date on which the asset is delivered to or by the Company. Financial assets are derecognized when the rights to receive cash flows from the investments have expired or were transferred and the Company has transferred substantially all risks and rewards of ownership. Financial assets are classified in the following categories at the time of initial recognition based on the purpose for which the financial assets were acquired: Financial assets at fair value through the consolidated income statement · Classification Financial assets are classified at fair value through the consolidated income statement if acquired primarily for the purpose of selling in the short-term, such as financial assets held for trading, or if so designated by management. This category primarily includes money market accounts and warrants the Company held in Refinitiv. · Recognition and measurement Financial assets in this category are initially recognized, and subsequently carried, at fair value, with changes recognized in the consolidated income statement. Transaction costs are expensed. Financial assets at amortized cost – Cash, trade and other receivables · Classification Trade and other receivables are non-derivative non-current · Recognition and measurement Trade and other receivables are initially recognized at fair value plus transaction costs and subsequently measured at amortized cost using the effective interest method. Financial assets at fair value through other comprehensive income · Classification These financial assets are non-derivatives non-current held-for-trading · Recognition and measurement Investments are initially recognized at fair value plus transaction costs and are subsequently carried at fair value with changes recognized in other comprehensive income or loss. The amounts presented in accumulated other comprehensive income or loss are not subsequently recycled to the consolidated income statement. Offsetting financial instruments Financial assets and liabilities are offset and reported net in the consolidated statement of financial position when there is a legally enforceable right to offset the recognized amounts and there is an intention to settle on a net basis or to simultaneously realize the asset and settle the liability. Bank overdrafts in cash pooling arrangements may only be netted against cash and cash equivalents when settlement occurs on or about the end of the reporting period.
Derivative financial instruments and hedging	Derivative financial instruments and hedging Derivatives are initially recognized at fair value on the date a contract is entered and are subsequently re-measured The Company documents at the inception of the transaction the relationship between hedging instruments and hedged items, as well as its risk management objectives and strategy for undertaking various hedging transactions. The Company also documents its assessment, both at hedge inception and on an ongoing basis, of whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in fair values or cash flows of hedged items. Non-performance The Company designates certain derivatives as either: · Fair value hedges These are hedges of the exposure to changes in fair value of a recognized asset or liability or unrecognized firm commitment. Changes in the fair value of derivatives that are designated as fair value hedges are recorded in the consolidated income statement together with any changes in the fair value of the hedged asset or liability that are attributable to the hedged risk. · Cash flow hedges These are hedges of the exposure to variability in cash flows of a recognized asset or liability or a highly probable forecast transaction. The effective portion of changes in the fair value of derivatives that are designated as a cash flow hedge is recognized in other comprehensive income or loss. The gain or loss relating to the ineffective portion is recognized immediately in the consolidated income statement. Additionally: — amounts accumulated in other comprehensive income or loss are recycled to the consolidated income statement in the period when the hedged item will affect earnings; — when a hedging instrument expires or is sold, or when a hedge no longer meets the criteria for hedge accounting, any cumulative gain or loss in other comprehensive income or loss remains in other comprehensive income or loss and is recognized when the forecast transaction is ultimately recognized in the consolidated income statement; and — when a forecast transaction is no longer expected to occur, the cumulative gain or loss that was reported in other comprehensive income or loss is immediately recognized in the consolidated income statement.
Derivatives that do not qualify for hedge accounting	Derivatives that do not qualify for hedge accounting Certain derivative instruments, while providing effective economic hedges, are not designated as hedges for accounting purposes. Changes in the fair value of any derivatives that are not designated as hedges for accounting purposes are recognized within “Other finance (costs) income” or “Operating expenses” in the consolidated income statement consistent with the underlying nature and purpose of the derivative instruments. Settlements from these instruments are classified within the cash flow line item where an economic hedge relationship exists in the consolidated statement of cash flow.
Taxation	Taxation Tax expense comprises current and deferred income tax. Tax is recognized in the consolidated income statement except to the extent it relates to items recognized in other comprehensive income or loss or directly in equity. Current tax Current tax expense is based on the results for the period as adjusted for items that are currently not taxable or not deductible. Current tax is calculated using tax rates and laws that were enacted or substantively enacted at the end of the reporting period. Management periodically evaluates positions taken in tax returns with respect to situations in which applicable tax regulation is subject to interpretation. Provisions are established where appropriate based on amounts expected to be paid to the tax authorities. Deferred tax Deferred tax is recognized on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the consolidated statement of financial position. Deferred tax is calculated using tax rates and laws that have been enacted or substantively enacted at the end of the reporting period, and which are expected to apply when the related deferred income tax asset is realized, or the deferred income tax liability is settled. Deferred tax liabilities: · Are generally recognized for all taxable temporary differences; · Are recognized for taxable temporary differences arising on investments in subsidiaries, associates and joint ventures, except where the reversal of the temporary difference can be controlled, and it is probable that the difference will not reverse in the foreseeable future or create a tax liability; and · Are not recognized on temporary differences that arise from goodwill that is not deductible for tax purposes. Deferred tax assets: · Are recognized to the extent it is probable that taxable profits will be available against which the deductible temporary differences can be utilized; and · Are reviewed at the end of the reporting period and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered. Deferred tax assets and liabilities are not recognized in respect of temporary differences that arise on initial recognition of assets and liabilities acquired other than in a business combination.
Critical judgments in applying accounting policies	Critical judgments in applying accounting policies Revenue recognition To determine the appropriate revenue recognition for its products and services, management must assess whether multiple products and services in customer contracts are distinct performance obligations that should be accounted for separately, or whether they must be accounted for together. In making the determination, management considers, for example, whether the Company regularly sells a good or service separately, or whether the goods or services are highly interrelated. Management must also determine the standalone selling price (SSP) for each distinct performance obligation. The Company typically has more than one SSP for individual products and services due to the stratification of its offerings by customer. As a result, management determines the SSP taking into consideration market conditions and other factors, including the value of its contracts, the product or service sold, the customer’s market, geographic location, and the number and types of users in each contract. Finally, management must also estimate the period over which to amortize assets arising from incremental costs of obtaining a contract. As management estimates that this period corresponds to the period over which a customer benefits from existing technology in the underlying product or service, this judgment is closely linked with the determination of software amortization periods. Uncertain tax positions The Company is subject to taxation in numerous jurisdictions and is routinely under audit by many different taxing authorities in the ordinary course of business. There are many transactions and calculations during the course of business for which the ultimate tax determination is uncertain, as taxing authorities may challenge some of the Company’s positions and propose adjustments or changes to its tax filings. As a result, the Company maintains provisions for uncertain tax positions that it believes appropriately reflect its risk. These provisions are made using the Company’s best estimates of the amount expected to be paid based on a qualitative assessment of all relevant factors. When appropriate, the Company performs an expected value calculation to determine its provisions. The Company reviews the adequacy of these provisions at the end of each reporting period and adjusts them based on changing facts and circumstances. Due to the uncertainty associated with tax audits, it is possible that at some future date, liabilities resulting from such audits or related litigation could vary significantly from the Company’s provisions. Where the outcome of these tax-related Unrecognized Deferred Tax Assets Deferred tax assets are recognized to the extent it is probable that taxable profits will be available against which the deductible temporary differences can be utilized, and are reduced to the extent that it is not probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered. In evaluating deferred tax assets, management must make judgments to assess the future taxable profits and likely outcomes of unresolved tax audits associated with the relevant jurisdictions. As of December 31, 2020, the Company recorded deferred tax assets of $1,801 million and disclosed unrecognized deferred tax assets of $1,188 million (see note 23).

Summary of Business and Signi_3

Summary of Business and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
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Schedule of Prior Period Adjustments And Impact On Financial Results Of Segments	These changes impacted the 2019 financial results of the segments, but did not change the consolidated 2019 financial results. The table below summarizes the changes: Year ended December 31, 2019 As Reported Adjustments As Revised Revenues Legal Professionals 2,419 14 2,433 Corporates 1,321 (13) 1,308 Tax & Accounting Professionals 844 (1) 843 Reuters News 630 - 630 Global Print 693 - 693 Eliminations/Rounding (1) - (1) Total revenues 5,906 - 5,906 Adjusted EBITDA Legal Professionals 901 (6) 895 Corporates 433 (21) 412 Tax & Accounting Professionals 323 (5) 318 Reuters News 35 33 68 Global Print 295 (1) 294 Corporate costs (494) - (494) Total adjusted EBITDA 1,493 - 1,493
Schedule of Computer Hardware and Other Property - Estimated Useful Lives	Property and equipment are recorded at cost and depreciated on a straight-line basis over their estimated useful lives as follows: Buildings and building improvements 10-40 years Computer equipment 3 years Furniture, fixtures and other equipment 5-7
Schedule of Other Identifiable Assets - Estimated Useful Lives	Identifiable intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives as follows: Trade names 3-20 years Customer relationships 6-30 years Databases and content 5-30 Other 10-30 years

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2020
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Summary of Revenues by Type and Geography	The following tables disaggregate revenues by type and geography and reconciles them to reportable segments (see note 4). Revenues by type Legal Corporates Tax & Reuters News Global Print Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 Recurring 2,367 2,249 1,143 1,079 682 703 566 573 - - 4,758 4,604 Transactions 168 184 224 229 154 140 62 57 - - 608 610 Global Print - - - - - - - - 620 693 620 693 Eliminations/Rounding - - - - - - - - - - (2) (1) Total 2,535 2,433 1,367 1,308 836 843 628 630 620 693 5,984 5,906 Revenues by geography (country of destination) Legal Corporates Tax & Reuters News Global Print Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 2020 2019 U.S. 2,027 1,991 1,129 1,062 704 704 418 419 436 482 4,714 4,658 Canada (country of domicile) 51 41 10 11 27 26 4 3 81 91 173 172 Other 19 25 45 60 76 82 9 9 17 22 166 198 Americas (North America, Latin America, South America) 2,097 2,057 1,184 1,133 807 812 431 431 534 595 5,053 5,028 U.K. 249 213 109 105 15 17 35 29 41 45 449 409 Other 60 59 41 37 2 1 105 111 15 18 223 226 EMEA (Europe, Middle East and Africa) 309 272 150 142 17 18 140 140 56 63 672 635 Asia Pacific 129 104 33 33 12 13 57 59 30 35 261 244 Eliminations/Rounding - - - - - - - - - - (2) (1) Total 2,535 2,433 1,367 1,308 836 843 628 630 620 693 5,984 5,906
Summary of of Deferred Income	December 31, 2020 2019 2018 Deferred revenue 866 833 815
Summary of Remaining Performance Obligations	The Company expects to recognize these revenues as follows: December 31, 2020 2019 1 year 25% 24% Between 1 and 2 years 13% 13% Between 2 and 3 years 8% 7% Later than 3 years 54% 56%

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Revenues and Adjusted EBITDA by Segment	Year ended December 31, 2020 2019 Revenues Legal Professionals 2,535 2,433 Corporates 1,367 1,308 Tax & Accounting Professionals 836 843 Reuters News 628 630 Global Print 620 693 Eliminations/Rounding (2) (1) Consolidated revenues 5,984 5,906 Adjusted EBITDA Legal Professionals 1,001 895 Corporates 460 412 Tax & Accounting Professionals 330 318 Reuters News 73 68 Global Print 242 294 Corporate costs (131) (494) Adjusted EBITDA 1,975 1,493 Fair value adjustments (see note 5) 10 - Depreciation (184) (154) Amortization of computer software (485) (449) Amortization of other identifiable intangible assets (123) (114) Other operating gains, net 736 423 Consolidated operating profit 1,929 1,199 Net interest expense (195) (163) Other finance income (costs) 30 (65) Share of post-tax losses in equity method investments (544) (599) Tax (expense) benefit (71) 1,198 Earnings from continuing operations 1,149 1,570
Schedule of Other Required Segment Data	Additions to Capital Assets (1) December 31, 2020 2019 Legal Professionals 382 679 Corporates 119 127 Tax & Accounting Professionals 100 524 Reuters News 28 228 Global Print 22 5 Reportable segments 651 1,563 Corporate assets 52 245 Total 703 1,808 (1) Capital assets include property and equipment, computer software and other identifiable intangible assets.
Summary of geographical information	Geographic Information Non-Current Assets (1) December 31, 2020 2019 U.S. 7,209 7,549 Canada (country of domicile) 1,034 1,035 Other 191 233 Americas (North America, Latin America, South America) 8,434 8,817 U.K. 1,544 1,612 Other 1,930 1,983 EMEA (Europe, Middle East and Africa) 3,474 3,595 Asia Pacific 126 133 Total 12,034 12,545 (1) Non-current
Summary of Revenues by Classes of Similar Products or Services	Revenues by Classes of Similar Products or Services The following table sets forth revenues by major type: Year ended December 31, 2020 2019 Electronic, software & services 5,364 5,213 Global Print 620 693 Total 5,984 5,906

Operating Expenses (Tables)

Operating Expenses (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Components of Operating Expenses	The components of operating expenses include the following: Year ended December 31, 2020 2019 Salaries, commissions and allowances (1) 2,269 2,431 Share-based payments 64 56 Post-employment benefits 135 130 Total staff costs 2,468 2,617 Goods and services (2) 1,158 1,411 Content 274 265 Telecommunications 54 48 Facilities 55 72 Fair value adjustments (3) (10) - Total operating expenses 3,999 4,413 (1) The 2019 period included $117 million of restructuring charges. See note 22. (2) Goods and services include professional fees, consulting and outsourcing services, contractors, selling and marketing, and other general and administrative costs. (3) Fair value adjustments primarily represent gains or losses due to changes in foreign currency exchange rates on intercompany balances that arise in the ordinary course of business.

Finance Costs, Net (Tables)

Finance Costs, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Components of Finance Costs, Net, Include Interest Expense (Income)	The components of finance costs, net, include interest expense (income) and other finance costs (income) as follows: Year ended December 31, 2020 2019 Interest expense: Debt 156 155 Derivative financial instruments - hedging activities (1) 2 Other, net 14 18 Fair value gains on cash flow hedges, transfer from equity (see note 19) (97) (21) Net foreign exchange losses on debt 97 21 Net interest expense - debt and other 169 175 Net interest expense - leases 10 7 Net interest expense - pension and other post-employment benefit plans 21 25 Interest income (5) (44) Net interest expense 195 163
Components of Finance Costs, Net, Include Other Finance Costs (Income)	Year ended December 31, 2020 2019 Net (gains) losses due to changes in foreign currency exchange rates (9) 37 Net (gains) losses on derivative instruments (21) 7 Losses from redemption of debt securities - 19 Other - 2 Other finance (income) costs (30) 65

Equity Method Investments (Tabl

Equity Method Investments (Tables)	12 Months Ended
	Dec. 31, 2020
Investments accounted for using equity method [abstract]
Share of Post-tax (Losses) Earnings in Equity Method Investments Reported in Consolidated Income Statement	The Company’s share of post-tax Year ended December 31, 2020 2019 Refinitiv (45% ownership interest) (554) (609) Other equity method investments 10 10 Total share of post-tax losses in equity method investments (544) (599)
Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position	The composition of equity method investments as reported in the consolidated statement of financial position is comprised of the following: December 31, 2020 2019 Refinitiv (45% ownership interest) 981 1,387 Other equity method investments 155 164 Total equity method investments 1,136 1,551
Summary of Financial Information for Refinitiv with Reconciliation to Thomson Reuters Carrying Value of its Investment	Set forth below is summarized financial information for 100% of Refinitiv, and a reconciliation to the Company’s carrying value of its investment. Year ended December 31, 2020 2019 Revenues 6,513 6,250 Net loss (1,137) (1,278) Remove: Net earnings attributable to non-controlling interests (95) (75) Net loss attributable to Refinitiv (1,232) (1,353) Other comprehensive income (loss) attributable to Refinitiv 330 (78) Total comprehensive loss attributable to Refinitiv (902) (1,431) December 31, 2020 2019 Assets Current assets 2,071 2,031 Non-current assets 21,094 20,709 Total assets 23,165 22,740 Liabilities Current liabilities 3,995 3,398 Non-current liabilities 14,268 13,964 Total liabilities 18,263 17,362 Net assets 4,902 5,378 Non-controlling interests (2,415) (2,100) Other (1) (306) (195) Net assets attributable to Refinitiv 2,181 3,083 Net assets attributable to Refinitiv - beginning period 3,083 4,514 Net loss attributable to Refinitiv (1,232) (1,353) Other comprehensive income (loss) attributable to Refinitiv 330 (78) Net assets attributable to Refinitiv - ending period 2,181 3,083 Thomson Reuters % share 45% 45% Thomson Reuters carrying amount 981 1,387 (1) Consists primarily of equity transactions excluded from Thomson Reuters 45% share of total comprehensive loss.

Taxation (Tables)

Taxation (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Components of Tax Expense (Benefit)	The components of tax expense (benefit) for 2020 and 2019 are as follows: Year ended December 31, 2020 2019 Current tax expense 302 197 Deferred tax benefit (231) (1,395) Total tax expense (benefit) 71 (1,198)
Schedule of Taxes on Items Recognized in Other Comprehensive Loss or Directly in Equity	Taxes on items recognized in “Other comprehensive income (loss)” or directly in equity in 2020 and 2019 are as follows: Year ended December 31, 2020 2019 Deferred tax expense (benefit) on actuarial gains (losses) on defined benefit plans 17 (12) Deferred tax expense (benefit) on share of other comprehensive income (loss) in equity method investments - may be subsequently reclassified to net earnings 35 (7) Deferred tax expense (benefit) on share of other comprehensive income (loss) in equity method investments - will not be reclassified to net earnings 1 (2) Deferred tax benefit on share-based payments (3) (8) Current tax benefit on share-based payments (11) (20)
Schedule of Reconciliation of Income Tax Expense Benefit	Below is a reconciliation of income taxes calculated at the Canadian corporate tax rate of 26.5% to the tax expense (benefit) for 2020 and 2019: Year ended December 31, 2020 2019 Income before tax 1,220 372 Income before tax multiplied by the standard rate of Canadian corporate tax of 26.5% 323 99 Effects of: Income taxes recorded at rates different from the Canadian tax rate (167) (159) Tax losses for which no benefit is recognized 1 1 Reorganization of certain foreign affiliate operations - (1,197) Net non-deductible foreign exchange and other losses 6 42 Impact of disposals of businesses - (66) Tax on reversal of statutory intercompany investment impairments (1) 905 - Recognition of tax losses that arose in prior years due to statutory intercompany investment impairments (1) (905) - Provision for uncertain tax provisions 10 (46) Derecognition of tax losses that arose in prior years - 88 Recognition of tax losses that arose in prior years (138) (29) U.S. base erosion minimum tax 43 7 Impact of tax law changes - 52 Research and development credits (12) (6) Other adjustments related to prior years (6) 3 Withholding taxes 6 3 Other differences 5 10 Total tax expense (benefit) 71 (1,198) (1) In 2020, a non-U.S.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Basic and diluted earnings per share [abstract]
Reconciliation of Earnings Used for Earnings per Share Calculations	Earnings used in determining consolidated earnings per share and earnings per share from continuing operations are as follows: Year ended December 31, 2020 2019 Earnings attributable to common shareholders 1,122 1,564 Less: Dividends declared on preference shares (2) (3) Earnings used in consolidated earnings per share 1,120 1,561 Less: Loss from discontinued operations, net of tax 27 6 Earnings used in earnings per share from continuing operations 1,147 1,567
Weighted Average Common Shares	The weighted-average number of common shares outstanding, as well as a reconciliation of the weighted-average number of common shares outstanding used in the basic earnings per share computation to the weighted-average number of common shares outstanding used in the diluted earnings per share computation, is presented below: Year ended December 31, 2020 2019 Weighted-average number of common shares outstanding 496,343,778 500,395,573 Weighted-average number of vested DSUs 378,514 434,180 Basic 496,722,292 500,829,753 Effect of stock options and TRSUs 1,309,714 1,691,447 Diluted 498,032,006 502,521,200

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Cash and Cash Equivalents	December 31, 2020 2019 Cash Cash at bank and on hand 311 335 Cash equivalents Money market accounts 1,476 490 Cash and cash equivalents 1,787 825

Trade and Other Receivables (Ta

Trade and Other Receivables (Tables)	12 Months Ended
	Dec. 31, 2020
Trade and other receivables [abstract]
Summary of Trade and Other Receivables	December 31, 2020 2019 Trade receivables 1,195 1,184 Less: allowance for doubtful accounts (37) (30) Less: allowance for sales adjustments (36) (34) Net trade receivables 1,122 1,120 Other receivables (1) 29 47 Trade and other receivables 1,151 1,167 (1) At December 31, 2020 and 2019, includes $11 million and $27 million, respectively, due from Refinitiv. There are no expected credit losses associated with this receivable. See note 31.
Summary of Aging of Gross Trade Receivables	The aging of gross trade receivables at each reporting date was as follows: December 31, 2020 2019 Current 751 806 Past due 1-30 days 195 185 Past due 31-60 days 72 63 Past due 61-90 days 42 36 Past due >91 days 135 94 Balance at December 31 1,195 1,184
Summary of Change in Allowance for Doubtful Accounts	The change in the allowance for doubtful accounts was as follows: December 31, 2020 2019 Balance at beginning of year 30 30 Charges 51 29 Write-offs (44) (28) Disposals of businesses - (1) Balance at end of year 37 30

Prepaid Expenses and Other Cu_2

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Schedule of Prepaid Expenses and Other Current Assets	December 31, 2020 2019 Inventory 26 23 Prepaid expenses 126 130 Current tax receivables (1) 65 72 Deferred commissions 127 117 Other current assets 81 204 Prepaid expenses and other current assets 425 546 (1) Both periods include $9 million of uncertain tax positions, which reduced total current tax receivables.

Property and Equipment (Table)

Property and Equipment (Table)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Property and Equipment	Property and equipment consist of the following: Land, Buildings and Building Improvements Computer Equipment Furniture, Fixtures and Other Equipment Total Cost: December 31, 2018 757 774 295 1,826 Impact of IFRS 16 adoption 126 - 2 128 Additions: Capital expenditures 46 46 16 108 Leases 143 41 - 184 Acquisitions 1 3 3 7 Removed from service (3) (130) (5) (138) Disposals of businesses (168) (13) (1) (182) Translation and other, net (4) 31 2 29 December 31, 2019 898 752 312 1,962 Additions: Capital expenditures 19 24 23 66 Leases 21 32 2 55 Removed from service (19) (12) (3) (34) Disposals of businesses (10) - (6) (16) Translation and other, net 5 (4) (32) (31) December 31, 2020 914 792 296 2,002 Accumulated depreciation: December 31, 2018 (441) (687) (225) (1,353) Current year depreciation (84) (54) (16) (154) Removed from service 3 130 5 138 Disposals of businesses 38 10 1 49 Translation and other, net 3 (33) 3 (27) December 31, 2019 (481) (634) (232) (1,347) Current year depreciation (105) (64) (15) (184) Removed from service 19 12 3 34 Disposals of businesses 7 - 4 11 Translation and other, net 15 2 12 29 December 31, 2020 (545) (684) (228) (1,457) Carrying amount: December 31, 2019 417 118 80 615 December 31, 2020 369 108 68 545

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Computer software [member]
Statement [LineItems]
Schedule of Changes in Intangible Assets	Computer software consists of the following: 2020 2019 Cost: Balance at January 1, 4,464 4,183 Additions: Internally developed 397 388 Purchased 4 15 Acquisitions 25 82 Removed from service (57) (66) Disposals of businesses (60) (144) Translation and other, net (2) 6 Balance at December 31, 4,771 4,464 Accumulated amortization: Balance at January 1, (3,564) (3,275) Current year amortization (485) (449) Removed from service 57 66 Disposals of businesses 49 94 Translation and other, net 2 - Balance at December 31, (3,941) (3,564) Carrying amount at December 31: 830 900
Other identifiable intangible assets [member]
Statement [LineItems]
Schedule of Changes in Intangible Assets	Indefinite Finite Useful Life Trade Names Trade Names Customer Databases and Other Total Cost: December 31, 2018 2,646 153 1,595 669 741 5,804 Acquisitions - 40 268 1 - 309 Disposals of businesses - (28) (72) (18) - (118) Translation and other, net - 1 19 (13) 5 12 December 31, 2019 2,646 166 1,810 639 746 6,007 Acquisitions - 2 21 - - 23 Removed from service - (18) - - (12) (30) Translation and other, net - (3) 13 1 9 20 December 31, 2020 2,646 147 1,844 640 743 6,020 Accumulated amortization: December 31, 2018 - (146) (1,122) (514) (698) (2,480) Current year amortization - (5) (66) (22) (21) (114) Disposals of businesses - 28 72 18 - 118 Translation and other, net - - (9) (2) (2) (13) December 31, 2019 - (123) (1,125) (520) (721) (2,489) Current year amortization - (10) (81) (21) (11) (123) Removed from service - 18 - - 12 30 Translation and other, net - (2) 2 (1) (10) (11) December 31, 2020 - (117) (1,204) (542) (730) (2,593) Carrying amount: December 31, 2019 2,646 43 685 119 25 3,518 December 31, 2020 2,646 30 640 98 13 3,427

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Goodwill	The following table presents goodwill for the years ended December 31, 2020 and 2019: 2020 2019 Cost: Balance at January 1, 5,853 5,076 Acquisitions 133 715 Disposals of businesses - (18) Translation and other, net (10) 80 Carrying amount at December 31: 5,976 5,853
Summary of Carrying Amount of Goodwill by Cash Generating Unit	The following table shows the carrying amount of goodwill that was tested for impairment by CGU: Cash-Generating Unit 2020 Legal Professionals 3,353 Corporates 1,294 Tax & Accounting Professionals 869 Reuters News 137 Global Print 248
Impairment Test of Goodwill- Key Assumptions	The key assumptions used in performing the impairment test, by CGU, are presented below: Cash-Generating Unit Perpetual (1) Discount Tax Legal Professionals 2.5 % 7.0 % 25.6 % Corporates 2.5 % 8.0 % 25.9 % Tax & Accounting Professionals 3.0 % 8.5 % 26.8 % Reuters News 2.5 % 9.0 % 20.8 % Global Print (4.4 %) 9.0 % 25.8 % (1) The perpetual growth rate is applied to the final year of cash flow projections.

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Financial Assets and Liabilities	Financial assets and liabilities in the consolidated statement of financial position were as follows: December 31, 2020 Assets/(Liabilities) at Amortized Cost Assets/(Liabilities) at Fair Value through Earnings Assets at Fair Value through Other Comprehensive Income or Loss Derivatives Used for Hedging (1) Total Cash and cash equivalents 311 1,476 - - 1,787 Trade and other receivables 1,151 - - - 1,151 Other financial assets – current 95 517 - - 612 Other financial assets – non-current (see note 20) 35 17 46 100 198 Trade payables (see note 21) (217) - - - (217) Accruals (see note 21) (761) - - - (761) Other financial liabilities – current (2) (3) (374) (2) - - (376) Long-term indebtedness (3,772) - - - (3,772) Other financial liabilities – non-current (see note 22) (4) (223) (1) - - (224) Total (3,755) 2,007 46 100 (1,602) December 31, 2019 Assets/(Liabilities) at Amortized Cost Assets/(Liabilities) at Fair Value through Earnings Assets at Fair Value through Other Comprehensive Income or Loss Derivatives Used for Hedging (1) Total Cash and cash equivalents 335 490 - - 825 Trade and other receivables 1,167 - - - 1,167 Other financial assets – current 98 435 - - 533 Other financial assets – non-current (see note 20) 45 24 29 - 98 Current indebtedness (579) - - - (579) Trade payables (see note 21) (265) - - - (265) Accruals (see note 21) (801) - - - (801) Other financial liabilities – current (2)(3) (365) (7) - (62) (434) Long-term indebtedness (2,676) - - - (2,676) Other financial liabilities – non-current (see note 22) (4) (253) (3) - - (256) Total (3,294) 939 29 (62) (2,388) (1) Derivatives are entered into with specific objectives for each transaction, and are linked to specific assets, liabilities, firm commitments, or highly probable forecasted transactions. (2) Includes lease liabilities of $83 million (2019 - $69 million). (3) Includes a commitment to repurchase up to $200 million (2019 - $200 million) of shares related to the Company’s pre-defined (4) Includes lease liabilities of $223 million (2019 - $253 million).
Summary of Debt and Related Derivative Instruments	The following is a summary of debt and related derivative instruments that hedged the cash flows of debt: Carrying Amount Fair Value December 31, 2020 Primary Debt Derivative Primary Debt Derivative Instruments C$1,400, 2.239% Notes, due 2025 1,093 (100 ) 1,151 (100 ) $600, 4.30% Notes, due 2023 597 - 657 - $450, 3.85% Notes, due 2024 (1) 241 - 266 - $500, 3.35% Notes, due 2026 497 - 557 - $350, 4.50% Notes, due 2043 (1) 116 - 130 - $350, 5.65% Notes, due 2043 342 - 471 - $400, 5.50% Debentures, due 2035 395 - 531 - $500, 5.85% Debentures, due 2040 491 - 696 - Total 3,772 (100 ) 4,459 (100 ) Long-term 3,772 (100 ) (1) Notes were partially redeemed in October 2018. Carrying Amount Fair Value December 31, 2019 Primary Debt Derivative Primary Debt Derivative Instruments Liability Bank and other 1 - 1 - C$550, 3.309% Notes, due 2021 435 62 435 62 $350, 3.95% Notes, due 2021 (1) 143 - 143 - $600, 4.30% Notes, due 2023 596 - 639 - $450, 3.85% Notes, due 2024 (1) 240 - 254 - $500, 3.35% Notes, due 2026 496 - 513 - $350, 4.50% Notes, due 2043 (1) 116 - 120 - $350, 5.65% Notes, due 2043 342 - 412 - $400, 5.50% Debentures, due 2035 395 - 447 - $500, 5.85% Debentures, due 2040 491 - 592 - Total 3,255 62 3,556 62 Current portion 579 62 Long-term portion 2,676 - (1) Notes were partially redeemed in October 2018.
Summmary of Information Regarding Notes Repaid	The following table provides information regarding notes that the Company issued and repaid in 2020. Month/Year Transaction Principal Amount (in millions) Notes issued May 2020 2.239% Notes, due C$1,400 Notes repaid January 2020 3.309% Notes, due 2021 C$550 January 2020 3.95% Notes, due 2021 US$139
Cross-currency Risk Exposures Interest Rate Swaps	The details of these instruments are set forth below: Received Paid Hedged Risk Year of Maturity Principal Amount 2020 Cash flow hedges Canadian dollar fixed U.S. dollar fixed Foreign exchange 2025 US$999 Received Paid Hedged Risk Year of Maturity Principal Amount 2019 Cash flow hedges Canadian dollar fixed U.S. dollar fixed Foreign exchange 2020 US$483
Currency Risk Exposures	The carrying amount of debt, all of which is unsecured, was denominated in the following currencies: Before Currency Hedging Arrangements After Currency Hedging Arrangements December 31, December 31, 2020 2019 2020 2019 (1) Canadian dollar 1,093 435 - - U.S. dollar 2,679 2,819 3,672 3,316 Other currencies - 1 - 1 3,772 3,255 3,672 3,317 (1) Includes fair value adjustments of $3 million at December 31, 2019 associated with the interest related fair value component of the hedging instrument settled in January 2020.
Fair Value Gains and Losses from Derivative Financial Instruments	Fair value gains and losses from derivative financial instruments recognized in the consolidated income statement and consolidated statement of changes in equity were as follows: Year ended December 31, 2020 2019 Fair Value Gain Fair Value Loss Fair Value Gain Fair Value Loss Warrants 82 – 419 – Foreign exchange contracts 11 – (7 ) – Hedging instruments: Cross currency interest rate swaps – cash flow hedges (1) 107 (11 ) 19 (6 ) Forward interest rate swaps – cash flow hedges 1 – 1 – 201 (11 ) 432 (6 ) (1) In 2020, comprised of $97 million (2019 - $21 million) of foreign exchange gains, hedge ineffectiveness of $10 million (2019 - nil) related to hedges on Canadian dollar denominated debt, and nil (2019 - $2 million loss) relating to swaps that were terminated ahead of their maturity in connection with the early repayment of the related hedged debt.
Currency Risk- Sensitivity Analysis	The table below shows the impact on earnings that a hypothetical 10% strengthening of the U.S. dollar against other foreign currencies would have as a result of changes in fair values of financial instruments as of December 31, 2020. (Decrease) increase to earnings £ € C$ Other Currencies Total Impact on earnings from financial assets and liabilities (1) - (1) - 3 2 Impact on earnings from non-permanent intercompany loans (21) (3) 52 (7) 21 Total impact on earnings (21) (4) 52 (4) 23 (1) Excludes debt which has been swapped into U.S. dollar obligations.
Disclosure of Maturity Analysis for Non-derivative and Derivative Financial Liabilities	The tables below set forth non-derivative December 31, 2020 2021 2022 2023 2024 2025 Thereafter Total Long-term debt (1) - - 600 242 1,099 1,869 3,810 Interest payable (1) 153 153 153 127 105 1,103 1,794 Debt-related hedges outflows 22 22 22 22 1,010 - 1,098 Debt-related hedges inflows (1) (25) (25) (25) (25) (1,110) - (1,210) Trade payables 217 - - - - - 217 Accruals 761 - - - - - 761 Lease liabilities 92 76 49 39 29 44 329 Other financial liabilities 291 - - - - - 291 Total 1,511 226 799 405 1,133 3,016 7,090 December 31, 2019 2020 2021 2022 2023 2024 Thereafter Total Current debt (2) 579 - - - - - 579 Long-term debt (3) - - - 600 242 1,869 2,711 Interest payable (3) 132 128 128 128 102 1,196 1,814 Debt-related hedges outflows (2) 499 - - - - - 499 Debt-related hedges inflows (2) (437) - - - - - (437) Trade payables 265 - - - - - 265 Accruals 801 - - - - - 801 Lease liabilities 80 75 60 41 34 64 354 Other financial liabilities 295 - - - - - 295 Total 2,214 203 188 769 378 3,129 6,881 (1) Represents contractual cash flows calculated using spot foreign exchange rates as of December 31, 2020. (2) Represents early repayment of hedged Canadian debt and U.S. dollar denominated debt redeemed in January 2020. (3) Represents contractual principal and interest payments.
Summary of Credit Ratings	The following table sets forth the credit ratings that the Company has received from rating agencies in respect of its outstanding securities as of December 31, 2020:​​​​​​​ Moody’s S&P Global Ratings DBRS Limited Fitch Long-term debt Baa2 BBB BBB (high) BBB+ Commercial paper P-2 A-2 R-2 (high) F1 Trend/Outlook Stable Stable Stable Stable
Net Debt	The following table presents the calculation of net debt (1) December 31, 2020 2019 Current indebtedness - 579 Long-term indebtedness 3,772 2,676 Total debt 3,772 3,255 Swaps (100) 62 Total debt after swaps 3,672 3,317 Remove fair value adjustments for hedges (2) 1 - Total debt after currency hedging arrangements 3,673 3,317 Remove transaction costs, premiums or discounts included in the carrying value of debt 38 36 Add: Lease liabilities (current and non-current) 306 322 Less: cash and cash equivalents (1,787) (825) Net debt (1) 2,230 2,850 (1) Net debt is a non-IFRS (2) Represents the interest-related fair value component of hedging instruments that are removed to reflect net cash outflow upon maturity.
Reconciliation of Movements of Liabilities to Cash Flows Arising from Financing Activities	The following is a reconciliation on movements of liabilities to cash flows arising from financing activities for the years ended December 31, 2020 and 2019: Notes and (1) Credit Derivative (Assets) Lease Total Liabilities December 31, 2018 3,216 - 76 - 3,292 IFRS 16 adoption - - - 197 197 Payments of lease principal - - - (51) (51) Additional leases - - - 176 176 Foreign exchange movements 21 - (21) - - Other, net (2) 18 - 7 - 25 December 31, 2019 3,255 - 62 322 3,639 Proceeds from debt 999 1,020 - - 2,019 Repayments of debt (560) (1,020) (65) - (1,645) Payments of lease principal - - - (75) (75) Additional leases - - - 58 58 Foreign exchange movements 97 - (97) 4 4 Other, net (2) (19) - - (3) (22) December 31, 2020 3,772 - (100) 306 3,978 (1) Includes bank and other financial instruments in current indebtedness. (2) Includes early redemption premium on debt, amortization of transaction and discount costs, fair value movements on derivatives and lease interest payments.
Fair Value Hierarchy	The levels used to determine fair value measurements for those instruments carried at fair value in the consolidated statement of financial position are as follows: December 31, 2020 Total Assets Level 1 Level 2 Level 3 Balance Money market accounts - 1,476 - 1,476 Warrants (1) - - 517 517 Other receivables (2) - - 17 17 Financial assets at fair value through earnings - 1,476 534 2,010 Financial assets at fair value through other comprehensive income (3) 27 19 - 46 Derivatives used for hedging (4) - 100 - 100 Total assets 27 1,595 534 2,156 Liabilities Contingent consideration (5) - - (3) (3) Financial liabilities at fair value through earnings - - (3) (3) Total liabilities - - (3) (3) December 31, 2019 Total Assets Level 1 Level 2 Level 3 Balance Money market accounts - 490 - 490 Warrants (1) - - 435 435 Other receivables (2) - - 24 24 Financial assets at fair value through earnings - 490 459 949 Financial assets at fair value through other comprehensive income (3) 2 27 - 29 Total assets 2 517 459 978 Liabilities Forward exchange contracts (6) - (7) - (7) Contingent consideration (5) - - (3) (3) Financial liabilities at fair value through earnings - (7) (3) (10) Derivatives used for hedging (4) - (62) - (62) Total liabilities - (69) (3) (72) (1) Warrants relate to the Company’s former equity method investment in Refinitiv (see note 8). (2) Receivables under indemnification arrangement (see note 30). (3) Investments in entities over which the Company does not have control, joint control or significant influence. (4) Comprised of fixed-to-fixed (5) Obligations to pay additional consideration for prior acquisitions, based upon performance measures contractually agreed at the time of purchase. (6) Used to manage foreign exchange risk on cash flows excluding indebtedness.
Schedule of Changes in Refinitv Warrants Level 3 Fair Value Measurement	The following reflects the change in the fair value of the Refinitiv warrants, which were classified as level 3 in the fair value measurement hierarchy, for the years ended December 31, 2020 and 2019: Year ended December 31, 2020 2019 January 1, 435 16 Gain recognized within other operating gains, net 82 419 December 31, 517 435
Disclosure of Offsetting of Financial Assets	The following table sets forth balances that are subject to master netting arrangements, however there were no offsetting amounts at December 31, 2020 or 2019. Financial assets Gross Financial Assets Gross Financial Liabilities Netted Against Assets Net Financial Assets in the Consolidated Statement of Financial Position Related Financial Liabilities Not Netted Net Amount Derivative financial assets 100 - 100 (1) - 100 Cash and cash equivalents 33 - 33 (2) - 33 December 31, 2020 133 - 133 - 133 Cash and cash equivalents 17 - 17 (2) - 17 December 31, 2019 17 - 17 - 17
Disclosure of Offsetting of Financial Liabilities	Financial liabilities Gross Financial Gross Financial Net Financial Liabilities in Related Financial Net Amount Derivative financial liabilities 68 - 68 (3) - 68 Bank indebtedness 1 - 1 (4) - 1 December 31, 2019 69 - 69 - 69 (1) Included within “Other financial assets” – non-current in the consolidated statement of financial position. (2) Included within “Cash and cash equivalents” in the consolidated statement of financial position. (3) Included within “Other financial liabilities” – current and “Provisions and other non-current liabilities”, in the consolidated statement of financial position. (4) Included within “Current indebtedness” in the consolidated statement of financial position.

Other Non-Current Assets (Table

Other Non-Current Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Other Non-Current Assets	December 31, 2020 2019 Net defined benefit plan surpluses (see note 26) 128 85 Cash surrender value of life insurance policies 334 320 Deferred commissions 105 82 Other financial assets (see note 19) 198 98 Other non-current assets 23 26 Total other non-current assets 788 611

Payables, Accruals and Provis_2

Payables, Accruals and Provisions (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Schedule of Payables, Accruals and Provisions	December 31, 2020 2019 Trade payables 217 265 Current tax liabilities (1) 251 124 Accruals 761 801 Provisions (see note 22) 111 119 Other current liabilities 70 64 Total payables, accruals and provisions 1,410 1,373 (1) Includes $214 million (2019 – $204 million) of uncertain tax positions, that were net of tax receivables in the same jurisdictions.

Provisions and Other Non-Curr_2

Provisions and Other Non-Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Provisions and Other Non-Current Liabilities	December 31, 2020 2019 Net defined benefit plan obligations (see note 26) 598 714 Other financial liabilities (see note 19) 224 256 Deferred compensation and employee incentives (1) 111 141 Provisions 140 126 Other non-current liabilities 10 27 Total provisions and other non-current liabilities 1,083 1,264 (1) In June 2020, the Company amended its non-employee director compensation plan such that the directors no longer control the decision as to whether DSUs earned as part of their compensation are settled in cash or common shares. As a result, director DSUs are now classified as equity settled and $27 million was reclassified to “Contributed surplus.”
Summary of Movement in Provisions	The following table presents the movement in provisions for the years ended December 31, 2020 and 2019: Employee- Restructuring Facilities- Other Total Balance at December 31, 2018 - 94 28 209 331 Charges 12 117 3 70 202 Utilization (25) (145) (18) (113) (301) Translation and other, net 13 (10) 14 (4) 13 Balance at December 31, 2019 - 56 27 162 245 Less: short-term provisions - 56 2 61 119 Long-term provisions - - 25 101 126 Balance at December 31, 2019 - 56 27 162 245 Charges 61 - 3 30 94 Utilization (15) (52) (2) (7) (76) Translation and other, net - 1 - (13) (12) Balance at December 31, 2020 46 5 28 172 251 Less: short-term provisions 46 5 3 57 111 Long-term provisions - - 25 115 140

Deferred Tax (Tables)

Deferred Tax (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Movements of Deferred Income Tax Liabilities	The movements of deferred tax assets and liabilities are shown below: Deferred tax liabilities Goodwill and Other Computer Software, Equity Method Other Total December 31, 2018 528 18 463 239 1,248 Impact of IFRS 16 adoption - 38 - 10 48 Acquisitions 63 16 - - 79 Benefit to income statement – continuing operations (11) (19) (158) (62) (250) Benefit to income statement – discontinued operations - (4) (2) - (6) Benefit to other comprehensive income - - (9) - (9) Disposals of businesses (2) (12) - - (14) Translation and other, net - 1 - 13 14 December 31, 2019 578 38 294 200 1,110 Acquisitions 5 2 - - 7 (Benefit) expense to income statement – continuing operations (33) (19) (159) 48 (163) Expense to other comprehensive income - - 36 - 36 Translation and other, net (4) 2 1 2 1 December 31, 2020 546 23 172 250 991
Summary of Movements of Deferred Income Tax Assets	Deferred tax assets Tax Losses Goodwill and Other (1) Employee Benefits Other Total December 31, 2018 73 11 238 177 499 Impact of IFRS 16 adoption - - - 45 45 Benefit (expense) to income statement - continuing operations 7 1,158 (5) (15) 1,145 Expense to income statement - discontinued operations (7) - - (6) (13) Benefit to other comprehensive income - - 12 - 12 Benefit to equity - - 8 - 8 Disposals of businesses - - - (1) (1) Translation and other, net 18 (1) - (2) 15 December 31, 2019 91 1,168 253 198 1,710 Benefit (expense) to income statement - continuing operations 29 (59) (24) 122 68 Benefit to income statement - discontinued operations - - - 4 4 Expense to other comprehensive income - - (17) - (17) Benefit to equity - - 3 - 3 Translation and other, net 11 1 (1) 22 33 December 31, 2020 131 1,110 214 346 1,801 Net deferred tax asset at December 31, 2019 600 Net deferred tax asset at December 31, 2020 810 (1) The 2019 period included a $1.2 billion increase in the tax basis of assets owned by a foreign subsidiary.
Summary of Estimated Recovery Period for Deferred Tax Balances	The estimated recovery period for the deferred tax balances is shown below: December 31, 2020 2019 Deferred tax liabilities Deferred tax liabilities to be recovered after more than 12 months 866 1,107 Deferred tax liabilities to be recovered within 12 months 125 3 Total deferred tax liabilities 991 1,110 Deferred tax assets Deferred tax assets to be recovered after more than 12 months 1,666 1,616 Deferred tax assets to be recovered within 12 months 135 94 Total deferred tax assets 1,801 1,710 Net deferred tax asset 810 600
Summary of Tax Losses and Other Tax Attributes	At December 31, 2020, the following summarizes the Company’s tax losses, certain deductible temporary differences and other tax attributes: Carry Forward Loss/ Tax Value Unrecognized Net Deferred Tax (1) Canadian net operating losses 2,130 562 (559) 3 Net operating losses – other jurisdictions 1,911 491 (430) 61 Capital losses 737 162 (99) 63 Investment in subsidiaries 300 75 (75) - Other deductible temporary differences 30 8 (8) - U.S. state net operating losses (2) n/m 12 (10) 2 Other attributes and credits (3) n/m 87 (7) 80 Total 1,397 (1,188) 209 (1) Includes tax losses of $131 million and $78 million of other deferred tax assets. (2) The aggregation of U.S. state net operating losses is not meaningful due to differing combination and apportionment rules in various states. (3) As other attributes and credits are calculated on an after-tax

Capital (Tables)

Capital (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Change in Capital	The change in capital, which includes stated capital and contributed surplus, was as follows: Number of Stated Capital Series II, Cumulative Contributed Total Capital Balance, December 31, 2018 501,493,187 3,333 110 1,905 5,348 Shares issued under DRIP 361,470 23 - - 23 Stock compensation plans (1) 3,074,176 178 - (104) 74 Repurchases of common shares (2) (7,469,287) (68) - - (68) Balance, December 31, 2019 497,459,546 3,466 110 1,801 5,377 Shares issued under DRIP 313,879 23 - - 23 Stock compensation plans (1) 1,896,489 136 - (62) 74 Repurchases of common shares (2) (2,552,386) (16) - - (16) Balance, December 31, 2020 497,117,528 3,609 110 1,739 5,458 (1) Movements in contributed surplus include cash payments related to withholding tax on stock compensation plans. Additionally, in 2020, the Company amended its non-employee director compensation plan such that the directors no longer control the decision as to whether DSUs earned as part of their compensation are settled in cash or common shares. As a result, director DSUs are now classified as equity settled and $27 million was reclassified to “Contributed surplus” from “Provisions and other non-current liabilities” on the consolidated statement of financial position. (2) Stated capital was reduced ($18) million and ($20) million at December 31, 2020 and 2019, respectively, related to the Company’s pre-defined
Summary of dividend declared and paid	Details of dividends declared per common share and dividends paid on common shares are as follows: Year ended December 31, 2020 2019 Dividends declared per common share $ 1.52 $ 1.44 Dividends declared 753 721 Dividends reinvested (23) (23) Dividends paid 730 698
Details of NCIB Share Repurchases	Details of share repurchases were as follows: Year ended December 31, 2020 2019 Share repurchases (millions of U.S. dollars) 200 488 Shares repurchased (number in millions) 2.6 7.8 Share repurchases – average price per share in U.S. dollars $ 78.37 $ 62.33

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
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Stock Incentive Plans	The following table summarizes the methods used to measure fair value for each type of award and the related vesting period over which compensation expense is recognized:​​​​​​​ Equity-settled Type of award Vesting period Fair Value Measure Compensation expense based on: Stock options Up to four years Black-Scholes option pricing model Fair value on business day prior to grant date TRSUs Up to five years Closing common share price Fair value on business day prior to grant date PRSUs Three-year performance period Closing common share price Fair value on business day prior to grant date
Fair Value Measurement of Stock Options	The weighted-average fair value of options granted for the years ended December 31, 2020 and 2019 and principal assumptions used in applying the Black-Scholes option pricing model were as follows: 2020 2019 Weighted-average fair value ($) 6.73 5.65 Weighted-average of key assumptions: Share price ($) 75.96 54.48 Exercise price ($) 75.96 54.48 Risk-free interest rate 0.9% 2.6% Dividend yield 3.1% 3.3% Volatility factor 16% 15% Expected life (in years) 5 5
Number of Awards Outstanding	The movement in the number of awards outstanding and their related weighted-average exercise prices are as follows: Stock TRSUs PRSUs Total Weighted- Average (1) Awards outstanding (in thousands): Outstanding at December 31, 2018 8,459 2,419 1,594 12,472 39.11 Granted 908 818 456 2,182 54.48 Exercised (3,971) (483) (1,087) (5,541) 38.21 Forfeited (322) (259) (82) (663) - Outstanding at December 31, 2019 5,074 2,495 881 8,450 42.36 Exercisable at December 31, 2019 1,449 - - 1,449 39.77 Granted 1,113 573 398 2,084 75.96 Exercised (2,575) (660) (463) (3,698) 40.05 Forfeited (151) (283) (71) (505) - Outstanding at December 31, 2020 3,461 2,125 745 6,331 54.06 Exercisable at December 31, 2020 577 - - 577 44.35 (1) Represents the weighted-average exercise price for stock options. TRSUs and PRSUs are excluded as they entitle holders to receive common shares upon vesting without an associated exercise price.
Summary of Share Based Compensation Expense	Share-based compensation expense for years ended December 31, 2020 and 2019 was as follows: Stock Options TRSUs PRSUs ESPP Total December 31, 2020 7 40 13 4 64 December 31, 2019 5 35 12 4 56
Summary of Additional Information Relating to Stock Option and SAR's	The following table summarizes additional information relating to stock options outstanding at December 31, 2020: Range of exercise prices (1) Number Weighted-Average Weighted-Average Number Exercisable Weighted-Average 35.01 - 40.00 1,090 7.23 $39.23 276 $38.47 40.01 - 45.00 574 6.17 $42.30 117 $42.30 50.01 - 55.00 753 8.18 $54.36 181 $54.36 60.01 - 65.00 12 8.36 $63.26 3 $63.26 75.01 - 80.00 1,032 9.18 $75.96 - - Total 3,461 577 (1) TRSUs and PRSUs are excluded as they entitle holders to receive common shares upon vesting without an associated exercise price.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Net Defined Benefit Plan Obligations	The movement on net defined benefit plan obligations was as follows: Pension Plans (1) OPEB (1) Total (1) 2020 2019 2020 2019 2020 2019 As of January 1 (510) (589) (119) (112) (629) (701) Plan income (expense) recognized in income statement: 43 (67) (3) (13) 40 (80) Actuarial gains (losses) 60 (49) 18 (4) 78 (53) Exchange differences 5 1 2 - 7 1 Contributions paid 28 195 6 8 34 203 Disposals of businesses - - - 1 - 1 Other 2 (1) (2) 1 - - Net plan obligations as of December 31 (372) (510) (98) (119) (470) (629) Net plan surpluses recognized in non-current assets 128 85 Net plan obligations recognized in non-current liabilities (598) (714) (1) Includes amounts for immaterial defined benefit and OPEB plans that are not included in the detailed analysis below.
Summary of Net Surpluses (Obligations) of Material Defined Benefit Plans	The net surpluses (obligations) of the material defined benefit plans recognized in the consolidated statement of financial position were as follows: Funded Unfunded (1) OPEB Total As of December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Present value of plan obligations (3,915) (3,628) (317) (299) (75) (102) (4,307) (4,029) Fair value of plan assets 3,867 3,428 - - - - 3,867 3,428 Net plan obligations (48) (200) (317) (299) (75) (102) (440) (601) Net plan surpluses 125 83 - - - - 125 83 Net plan obligations (173) (283) (317) (299) (75) (102) (565) (684) (1) Unfunded pension plans consist of SERPs for eligible employees.
Disclosure of Present Value of Defined Benefit Obligations	The following summarizes activity in the defined benefit obligation: Present Value of Defined Benefit Obligations Funded Unfunded OPEB Total As of December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Opening defined benefit obligation (3,628) (3,164) (299) (279) (102) (104) (4,029) (3,547) Current service cost (44) (39) (1) (2) - (1) (45) (42) Administration fees (7) (11) (1) (1) - - (8) (12) Interest cost (103) (119) (9) (12) (3) (4) (115) (135) Actuarial losses from changes in financial assumptions (1) (406) (497) (20) (27) (10) (8) (436) (532) Actuarial gains from changes in demographic assumptions 23 52 2 4 1 1 26 57 Experience (losses) gains (2) (20) 1 (3) (4) 28 6 5 3 Contributions by employees (1) (1) - - (2) (2) (3) (3) Benefits paid 190 172 20 22 8 10 218 204 Administration fees disbursements 7 11 - - - - 7 11 Curtailment gain - 8 - - - - - 8 Plan amendments (3) 119 - (4) - - - 115 - Exchange differences (43) (42) (2) (1) - - (45) (43) Other (2) 1 - 1 5 - 3 2 Closing defined benefit obligation (3,915) (3,628) (317) (299) (75) (102) (4,307) (4,029) (1) Losses in 2020 and 2019 were primarily associated with a decrease in discount rates used to measure the obligation. (2) In 2020, OPEB experience gains reflect lower costs due to transition of the U.S. retiree medical plan from self-insured to an insurance company. (3) In 2020, gains primarily relate to a plan amendment to freeze the TRGP from future service accruals effective January 1, 2023.
Defined Benefit Obligation - Other Disclosures	The total closing defined benefit obligation can be further analyzed by participant group and by geography. As of December 31, 2020 2019 As of December 31, 2020 2019 Active employees 27% 30% U.S. 69% 70% Deferred 35% 33% U.K. 27% 26% Retirees 38% 37% Rest of world 4% 4% Closing defined benefit obligation 100% 100% 100% 100%
Fair Value of Plan Assets	The following summarizes activity in plan assets: Fair Value of Plan Assets Funded Unfunded OPEB Total As of December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Opening fair value of plan assets 3,428 2,857 - - - - 3,428 2,857 Interest income (1) 94 110 - - - - 94 110 Return on plan assets excluding amounts included in interest income (2) 482 424 - - - - 482 424 Contributions by employer 7 173 20 22 6 8 33 203 Contributions by employees 1 1 - - 2 2 3 3 Benefits paid (190) (172) (20) (22) (8) (10) (218) (204) Administration fees disbursements (7) (11) - - - - (7) (11) Exchange differences 51 43 - - - - 51 43 Other 1 3 - - - - 1 3 Closing fair value of plan assets 3,867 3,428 - - - - 3,867 3,428 (1) Interest income is calculated using the discount rate for the period. (2) Return on plan assets represents the difference between the actual return on plan assets and the interest income computed using the discount rate.
Summary of Major Categories of Plan Assets for Funded Plans	In aggregate, the major categories of plan assets for funded plans were as follows: Quoted (1) Unquoted Total As of December 31, 2020 2019 2020 2019 2020 2019 Equities (2) U.S. 157 144 65 50 222 194 U.K. 3 6 - - 3 6 All other 109 92 526 479 635 571 Total Equities 269 242 591 529 860 771 Bonds (3) Corporate U.S. 226 201 791 698 1,017 899 U.K. - - - 149 - 149 All other 3 2 109 54 112 56 Government U.S. 3 2 631 552 634 554 All other 4 3 13 11 17 14 Other fixed income 73 68 183 112 256 180 Total Bonds 309 276 1,727 1,576 2,036 1,852 Multi-asset (4) U.K. - 7 - - - 7 All other 1 - 134 133 135 133 Total Multi-asset 1 7 134 133 135 140 Property 4 2 - - 4 2 Insurance - - 36 38 36 38 Derivatives - - 679 266 679 266 Cash and cash equivalents 12 11 97 341 109 352 Other 1 1 7 6 8 7 Total 596 539 3,271 2,889 3,867 3,428 (1) Asset valuation based on Level 1 evidence under the fair value hierarchy: quoted prices (unadjusted) in active markets for identical assets or liabilities. (2) Equities include direct shareholdings and funds focused on equity strategies. (3) Bonds include direct credit holdings and funds focused on fixed income strategies. Within this grouping, Government includes debt issued by national, state and local government agencies and Other fixed income includes blended Corporate/Government credit strategies. (4) Multi-asset includes funds that invest in a range of asset classes.
Summary of Weighted-Average Actuarial Assumptions	The weighted-average actuarial assumptions were as follows: Funded Unfunded OPEB As of December 31, 2020 2019 2020 2019 2020 2019 Discount rate 2.22% 2.94% 2.59% 3.31% 2.05% 3.03% Inflation assumption 2.78% 3.19% 2.71% 2.37% - - Rate of increase in salaries 3.48% 3.44% 1.75% 3.50% 3.50% 3.40% Rate of increase in pension payments 2.79% 3.03% 2.75% 3.05% - - Medical cost trend - - - - 7.50% 6.25%
Summary of Life Expectation in Years of an Average Plan Participant	The following table illustrates the life expectation in years of an average plan participant retiring at age 65 as of December 31, 2020 and 2019 and a plan participant at age 40 as of December 31, 2020 and 2019 retiring 25 years later at age 65 under the mortality assumptions used. December 31, 2020 Life Expectation in Years Male Female Employee retiring as of December 31, 2020 at age 65 21 23 Employee age 40 as of December 31, 2020 retiring at age 65 23 24 December 31, 2019 Life Expectation in Years Male Female Employee retiring as of December 31, 2019 at age 65 22 23 Employee age 40 as of December 31, 2019 retiring at age 65 24 25
Defined Benefit Plan Expense	Defined benefit plan (income) expense for material defined benefit plans for years ended December 31, 2020 and 2019 was as follows: Income Statement (1) Funded Unfunded OPEB Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Current service cost 44 39 1 2 - 1 45 42 Net interest cost 9 9 9 12 3 4 21 25 Administration fees 7 11 1 1 - - 8 12 Curtailment gain - (8) - - - - - (8) Plan amendments (2) (119) - 4 - - - (115) - Defined benefit plan (income) expense (59) 51 15 15 3 5 (41) 71 (1) Current service cost and administration fees are included in the “Post-employment benefits” component of “Operating expenses” as set out in note 5. Net interest cost is reported in “Finance costs, net” as set out in note 7. (2) Related to the TRGP amendment to freeze the plan from future service accruals effective January 1, 2023.
Summary of Amounts Recognized in Other Comprehensive Loss (Income) for Material Defined Benefit Plans	The following summarizes amounts recognized in other comprehensive (income) loss for material defined benefit plans: Other Comprehensive (Income) Loss Funded Unfunded OPEB Total Year ended December 31, 2020 2019 2020 2019 2020 2019 2020 2019 Remeasurement losses (gains) on defined benefit obligation: Due to financial assumption changes 406 497 20 27 10 8 436 532 Due to demographic assumption changes (23) (52) (2) (4) (1) (1) (26) (57) Due to experience 20 (1) 3 4 (28) (6) (5) (3) Return on plan assets greater than discount rate (482) (424) - - - - (482) (424) Total recognized in other comprehensive (income) loss before taxation (79) 20 21 27 (19) 1 (77) 48 Accumulated Comprehensive Loss (Income) Funded Unfunded OPEB Total 2020 2019 2020 2019 2020 2019 2020 2019 Balance of accumulated comprehensive loss (income) at January 1 1,391 1,371 82 55 (87) (88) 1,386 1,338 Net actuarial (gains) losses recognized in the year (79) 20 21 27 (19) 1 (77) 48 Total accumulated comprehensive loss (income) at December 31, 1,312 1,391 103 82 (106) (87) 1,309 1,386

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Disclosure of carrying amount and related depreciation	The carrying amount and the related depreciation for the right-of-use Land, Buildings Computer Furniture, Fixtures Total Year ended December 31, 2020 Carrying amount 171 49 2 222 Depreciation 67 22 1 90 Year ended December 31, 2019 Carrying amount 213 40 1 254 Depreciation 52 1 1 54
Disclosure of future aggregate undiscounted non-cancellable lease payments	The following table sets forth the Company’s future aggregate undiscounted non-cancellable lease payments over the lease term as well as its discounted lease liabilities as reported in the consolidated statement of financial position as of December 31, 2020 and 2019: December 31, 2020 2019 Within 1 year 92 80 Between 1 and 2 years 76 75 Between 2 and 3 years 49 60 Between 3 and 4 years 39 41 Between 4 and 5 years 29 34 Later than 5 years 44 64 Total undiscounted cash flows 329 354 Lease liabilities included in the consolidated statement of financial position Current 83 69 Non-current 223 253
Disclosure of future aggregate undiscounted lease receipts for finance leases	The Company is entitled to receive the following aggregate undiscounted payments for finance leases as of December 31, 2020 and 2019: December 31, 2020 2019 Within 1 year 8 9 Between 1 and 2 years 7 8 Between 2 and 3 years 7 7 Between 3 and 4 years 7 6 Between 4 and 5 years 5 7 Later than 5 years 2 7 Total undiscounted lease payments to be received 36 44 Unearned finance income (3) (4) Net investment in leases 33 40

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Details of Other in the Consolidated Statement of Cash Flow	Details of “Other” in the consolidated statement of cash flow are as follows: Year ended December 31, 2020 2019 Non-cash employee benefit charges 160 157 Net (gains) losses on foreign exchange and derivative financial instruments (28) 47 Share of post-tax losses in equity method investments 544 599 Revaluation of Refinitiv warrants (see note 6) (82) (419) Fair value adjustments (10) - Other (1) (163) 1 421 385 (1) Includes $119 million gain related to an amendment to the Company’s U.S. pension plan. See note 26.
Details of Changes in Working Capital and Other Items	Details of “Changes in working capital and other items” are as follows: Year ended December 31, 2020 2019 Trade and other receivables 29 116 Prepaid expenses and other current assets 8 25 Other financial assets 2 (17) Payables, accruals and provisions (133) (220) Deferred revenue 19 (10) Other financial liabilities (2) 17 Income taxes 250 (71) Other (71) (87) 102 (247)
Details of Income Taxes Paid	Details of income taxes (paid) received are as follows: Year ended December 31, 2020 2019 Operating activities - continuing operations (52) (268) Operating activities - discontinued operations 2 (45) Investing activities - continuing operations (114) (1) Total income taxes paid (164) (314)

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Acquisition Activity	The number of acquisitions completed, and the related total consideration during 2020 and 2019 were as follows: Year ended December 31, 2020 2019 Number of Cash Number of Cash Businesses acquired 2 166 4 1,049 Less: Cash acquired (4) (59) Businesses acquired, net of cash 2 162 4 990 Investments in businesses - 1 - 4 Contingent consideration payments 4 - Asset acquisitions - - 1 4 2 167 5 998
Summary of Net Assets Acquired	The details of net assets acquired were as follows: Year ended December 31, 2020 2019 Cash and cash equivalents 4 59 Trade receivables 4 13 Prepaid expenses and other current assets 1 7 Current assets 9 79 Property and equipment - 7 Computer software 25 78 Other identifiable intangible assets 23 309 Total assets 57 473 Payables and accruals (7) (29) Deferred revenue (6) (25) Other financial liabilities (2) (1) Current liabilities (15) (55) Provisions and other non-current liabilities (2) (5) Deferred tax (7) (79) Total liabilities (24) (139) Net assets acquired 33 334 Goodwill 133 715 Total 166 1,049

Contingencies, Commitments an_2

Contingencies, Commitments and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2020
Text block [abstract]
Summary of Future Unconditional Purchase Obligations	The future unconditional purchase obligations as of December 31, 2020 and 2019 are as follows: December 31, 2020 2019 Within 1 year 316 300 Between 1 and 2 years 277 219 Between 2 and 3 years 242 180 Between 3 and 4 years 71 160 Between 4 and 5 years 13 62 Later than 5 years - 1 919 922

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of transactions between related parties [line items]
Summary of Expense or Contra-Expense	For the years ended December 31, 2020 and 2019, the Company recorded the following amounts as expense or contra-expense, as applicable, related to these transactions: Provided by Thomson Reuters to Refinitiv Contra-expense Provided by Refinitiv to Thomson Reuters (Expense) Year ended December 31, Year ended December 31, 2020 2019 2020 2019 Transitional services 8 26 (15) (52) Properties leased 23 39 (13) (34)
Summary of Key Management Personnel Compensation, Including Directors	Key management personnel compensation, including directors, was as follows: Year ended December 31, 2020 2019 Salaries and other benefits 41 60 Share-based payments 16 20 Total compensation 57 80

Summary of Business and Signi_4

Summary of Business and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Disclosure of business description and basis of presentation [line items]
Adjustment to opening balance of retained earnings	$ 5,211	$ 4,965
Proportion of voting rights in subsidiaries used to determine control	50.00%
Criteria period for contract cost recognized as asset.	longer than one year
Maturity period of investments classified as cash and cash equivalents	three months or less
Contract cost [member]
Disclosure of business description and basis of presentation [line items]
Description of useful life, intangible assets other than goodwill	three years
Computer software [member]
Disclosure of business description and basis of presentation [line items]
Description of useful life, intangible assets other than goodwill	three-year
Bottom of range [member]
Disclosure of business description and basis of presentation [line items]
Recurring revenues subscription term	1 year
Percentage of voting interest in equity method investee.	20.00%
Top of range [member]
Disclosure of business description and basis of presentation [line items]
Recurring revenues subscription term	5 years
Percentage of voting interest in equity method investee.	50.00%
Adjustments Due to Adoption of IFRS 16 [member]
Disclosure of business description and basis of presentation [line items]
Adjustment to opening balance of retained earnings			$ 11

Summary of Business and Signi_5

Summary of Business and Significant Accounting Policies-Schedule of Prior Period Adjustments and Impact on Financial Results of Segments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue	$ 5,984	$ 5,906
Adjusted EBITDA	1,975	1,493
Operating segments [member] | Legal Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue	2,535	2,433
Adjusted EBITDA	1,001	895
Operating segments [member] | Corporates [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue	1,367	1,308
Adjusted EBITDA	460	412
Operating segments [member] | Reuters News [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue	628	630
Adjusted EBITDA	73	68
Operating segments [member] | Global Print [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue	620	693
Adjusted EBITDA	242	294
Operating segments [member] | Eliminations [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue	$ (2)	(1)
As Reported [member] | Operating segments [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		5,906
Adjusted EBITDA		1,493
As Reported [member] | Operating segments [member] | Legal Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		2,419
Adjusted EBITDA		901
As Reported [member] | Operating segments [member] | Corporates [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		1,321
Adjusted EBITDA		433
As Reported [member] | Operating segments [member] | Tax & Accounting Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		844
Adjusted EBITDA		323
As Reported [member] | Operating segments [member] | Reuters News [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		630
Adjusted EBITDA		35
As Reported [member] | Operating segments [member] | Global Print [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		693
Adjusted EBITDA		295
As Reported [member] | Operating segments [member] | Eliminations [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		(1)
As Reported [member] | Operating segments [member] | Corporate costs [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Adjusted EBITDA		(494)
Adjustments [member] | Operating segments [member] | Legal Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		14
Adjusted EBITDA		(6)
Adjustments [member] | Operating segments [member] | Corporates [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		(13)
Adjusted EBITDA		(21)
Adjustments [member] | Operating segments [member] | Tax & Accounting Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		(1)
Adjusted EBITDA		(5)
Adjustments [member] | Operating segments [member] | Reuters News [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Adjusted EBITDA		33
Adjustments [member] | Operating segments [member] | Global Print [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Adjusted EBITDA		(1)
As Revised [Member] | Operating segments [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		5,906
Adjusted EBITDA		1,493
As Revised [Member] | Operating segments [member] | Legal Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		2,433
Adjusted EBITDA		895
As Revised [Member] | Operating segments [member] | Corporates [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		1,308
Adjusted EBITDA		412
As Revised [Member] | Operating segments [member] | Tax & Accounting Professionals [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		843
Adjusted EBITDA		318
As Revised [Member] | Operating segments [member] | Reuters News [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		630
Adjusted EBITDA		68
As Revised [Member] | Operating segments [member] | Global Print [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		693
Adjusted EBITDA		294
As Revised [Member] | Operating segments [member] | Eliminations [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Revenue		(1)
As Revised [Member] | Operating segments [member] | Corporate costs [member]
Disclosure Of Prior Period Adjustments And Impact On financial results Of Segments [Line Items]
Adjusted EBITDA		$ (494)

Summary of Business and Signi_6

Summary of Business and Significant Accounting Policies - Schedule of Property And Equipment - Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2020
Computer Equipment [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property useful lives	3 years
Bottom of range [member] | Buildings and building improvements [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property useful lives	10 years
Bottom of range [member] | Furniture, fixtures and other equipment [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property useful lives	5 years
Top of range [member] | Buildings and building improvements [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property useful lives	40 years
Top of range [member] | Furniture, fixtures and other equipment [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property useful lives	7 years

Summary of Business and Signi_7

Summary of Business and Significant Accounting Policies - Schedule of Other Identifiable Assets - Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2020
Bottom of range [member] | Trade names [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	3 years
Bottom of range [member] | Customer relationships [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	6 years
Bottom of range [member] | Databases and content [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	5 years
Bottom of range [member] | Other identifiable intangible assets [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	10 years
Top of range [member] | Trade names [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	20 years
Top of range [member] | Customer relationships [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	30 years
Top of range [member] | Databases and content [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	30 years
Top of range [member] | Other identifiable intangible assets [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets useful lives	30 years

Critical Accounting Estimates_2

Critical Accounting Estimates and Judgments - Additional Information (Detail) - USD ($) $ in Millions	Oct. 01, 2018	Dec. 31, 2020	Dec. 31, 2019
Disclosure of changes in accounting estimates [Line Items]
Combined allowances		$ 73
Trade receivables		$ 1,195	$ 1,184
Combined allowances, percentage of trade receivables		6.00%
Increase in reserves as a percentage of trade receivables		1.00%
Decrease in pre-tax earnings		$ 12
Computer software		830	900
Other identifiable intangible assets		3,427	3,518
Goodwill		5,976	5,853
Equity method investments		1,136	1,551
Uncertain Tax Positions		228
Total deferred tax assets		1,801	1,710
Unrecognized Deferred Tax Assets		1,188
Other equity method investments [member]
Disclosure of changes in accounting estimates [Line Items]
Equity method investments		155	$ 164
Technology Related Development [member]
Disclosure of changes in accounting estimates [Line Items]
Computer software		800
Major purchases of assets [member]
Disclosure of changes in accounting estimates [Line Items]
Other identifiable intangible assets		3,400
Goodwill		$ 6,000
Refinitiv [member]
Disclosure of changes in accounting estimates [Line Items]
Percentage of ownership held	45.00%	45.00%	45.00%

Revenues - Additional Informati

Revenues - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transaction price allocated to remaining performance obligations [line items]
Revenue recognized in deferred revenue	$ 786	$ 796
Amortization of deferred commissions	128	120
Aggregate amount of transaction price allocated to remaining performance obligations	16,000	16,100
Refinitiv [member]
Disclosure of transaction price allocated to remaining performance obligations [line items]
Revenues from Contracts With Customers	$ 336	$ 336

Revenues - Summary of Revenues

Revenues - Summary of Revenues by Type (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ 5,984	$ 5,906
Recurring [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	4,758	4,604
Transactions [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	608	610
Global Print [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	620	693
Eliminations [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	(2)	(1)
Legal Professionals [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	2,535	2,433
Legal Professionals [member] | Recurring [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	2,367	2,249
Legal Professionals [member] | Transactions [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	168	184
Corporates [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,367	1,308
Corporates [member] | Recurring [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,143	1,079
Corporates [member] | Transactions [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	224	229
Tax & Accounting Professionals [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	836	843
Tax & Accounting Professionals [member] | Recurring [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	682	703
Tax & Accounting Professionals [member] | Transactions [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	154	140
Reuters News [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	628	630
Reuters News [member] | Recurring [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	566	573
Reuters News [member] | Transactions [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	62	57
Global Print [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	620	693
Global Print [member] | Global Print [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	620	693
Global Print [member] | Eliminations [member] | Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue		$ 0

Revenues - Summary of geographi

Revenues - Summary of geographical information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of geographical areas [line items]
Revenue	$ 5,984	$ 5,906
U.S. [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	4,714	4,658
Canada [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	173	172
Other [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	166	198
Americas [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	5,053	5,028
U.K. [Member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	449	409
Other Countries [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	223	226
EMEA [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	672	635
Asia Pacific [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	261	244
Eliminations [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	(2)	(1)
Legal Professionals [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	2,535	2,433
Legal Professionals [member] | U.S. [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	2,027	1,991
Legal Professionals [member] | Canada [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	51	41
Legal Professionals [member] | Other [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	19	25
Legal Professionals [member] | Americas [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	2,097	2,057
Legal Professionals [member] | U.K. [Member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	249	213
Legal Professionals [member] | Other Countries [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	60	59
Legal Professionals [member] | EMEA [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	309	272
Legal Professionals [member] | Asia Pacific [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	129	104
Corporates [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1,367	1,308
Corporates [member] | U.S. [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1,129	1,062
Corporates [member] | Canada [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	10	11
Corporates [member] | Other [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	45	60
Corporates [member] | Americas [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1,184	1,133
Corporates [member] | U.K. [Member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	109	105
Corporates [member] | Other Countries [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	41	37
Corporates [member] | EMEA [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	150	142
Corporates [member] | Asia Pacific [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	33	33
Tax & Accounting Professionals [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	836	843
Tax & Accounting Professionals [member] | U.S. [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	704	704
Tax & Accounting Professionals [member] | Canada [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	27	26
Tax & Accounting Professionals [member] | Other [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	76	82
Tax & Accounting Professionals [member] | Americas [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	807	812
Tax & Accounting Professionals [member] | U.K. [Member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	15	17
Tax & Accounting Professionals [member] | Other Countries [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	2	1
Tax & Accounting Professionals [member] | EMEA [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	17	18
Tax & Accounting Professionals [member] | Asia Pacific [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	12	13
Reuters News [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	628	630
Reuters News [member] | U.S. [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	418	419
Reuters News [member] | Canada [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	4	3
Reuters News [member] | Other [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	9	9
Reuters News [member] | Americas [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	431	431
Reuters News [member] | U.K. [Member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	35	29
Reuters News [member] | Other Countries [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	105	111
Reuters News [member] | EMEA [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	140	140
Reuters News [member] | Asia Pacific [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	57	59
Global Print [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	620	693
Global Print [member] | U.S. [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	436	482
Global Print [member] | Canada [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	81	91
Global Print [member] | Other [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	17	22
Global Print [member] | Americas [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	534	595
Global Print [member] | U.K. [Member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	41	45
Global Print [member] | Other Countries [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	15	18
Global Print [member] | EMEA [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	56	63
Global Print [member] | Asia Pacific [member] | Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	$ 30	$ 35

Revenues - Summary of Contract

Revenues - Summary of Contract Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Deferred Income [Abstract]
Deferred revenue	$ 866	$ 833	$ 815

Revenues - Summary of Remaining

Revenues - Summary of Remaining Performance Obligations (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Not later than one year [member]
Disclosure of transaction price allocated to remaining performance obligations [line items]
2020	25.00%	24.00%
Between one and two years [member]
Disclosure of transaction price allocated to remaining performance obligations [line items]
2020	13.00%	13.00%
Between two and three years [member]
Disclosure of transaction price allocated to remaining performance obligations [line items]
2020	8.00%	7.00%
Later than three year [member]
Disclosure of transaction price allocated to remaining performance obligations [line items]
2020	54.00%	56.00%

Segment Information - Summary o

Segment Information - Summary of Operating Results of Reportable Segments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [Line Items]
Revenues	$ 5,984	$ 5,906
Adjusted EBITDA	1,975	1,493
Fair value adjustments (see note 5)	10	0
Depreciation	(184)	(154)
Other operating gains, net	736	423
Operating profit	1,929	1,199
Net interest expense	(195)	(163)
Other finance income (costs)	30	(65)
Share of post-tax losses in equity method investments	(544)	(599)
Tax (expense) benefit	(71)	1,198
Earnings from continuing operations	1,149	1,570
Operating segments [member] | Legal Professionals [member]
Disclosure of operating segments [Line Items]
Revenues	2,535	2,433
Adjusted EBITDA	1,001	895
Operating segments [member] | Corporates [member]
Disclosure of operating segments [Line Items]
Revenues	1,367	1,308
Adjusted EBITDA	460	412
Operating segments [member] | Tax & Accounting Professionals [member]
Disclosure of operating segments [Line Items]
Revenues	836	843
Adjusted EBITDA	330	318
Operating segments [member] | Reuters News [member]
Disclosure of operating segments [Line Items]
Revenues	628	630
Adjusted EBITDA	73	68
Operating segments [member] | Global Print [member]
Disclosure of operating segments [Line Items]
Revenues	620	693
Adjusted EBITDA	242	294
Operating segments [member] | Eliminations [member]
Disclosure of operating segments [Line Items]
Revenues	(2)	(1)
Corporate costs [member]
Disclosure of operating segments [Line Items]
Adjusted EBITDA	(131)	(494)
Computer software [member]
Disclosure of operating segments [Line Items]
Amortization	(485)	(449)
Other identifiable intangible assets [member]
Disclosure of operating segments [Line Items]
Amortization	$ (123)	$ (114)

Segment Information - Schedule

Segment Information - Schedule of Other Required Segment Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	$ 703	$ 1,808
Reportable segments [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	651	1,563
Reportable segments [member] | Legal Professionals [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	382	679
Reportable segments [member] | Corporates [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	119	127
Reportable segments [member] | Tax & Accounting Professionals [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	100	524
Reportable segments [member] | Reuters News [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	28	228
Reportable segments [member] | Global Print [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	22	5
Corporate assets [member]
Disclosure of operating segments [Line Items]
Additions to capital assets and goodwill	$ 52	$ 245

Segment Information - Summary_2

Segment Information - Summary of Operating Results by Geographical areas (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [Line Items]
Non-Current Assets	$ 12,034	$ 12,545
U.S. [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	7,209	7,549
Canada [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	1,034	1,035
Other [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	191	233
Americas [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	8,434	8,817
U.K. [Member]
Disclosure of operating segments [Line Items]
Non-Current Assets	1,544	1,612
Other Countries [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	1,930	1,983
EMEA [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	3,474	3,595
Asia Pacific [member]
Disclosure of operating segments [Line Items]
Non-Current Assets	$ 126	$ 133

Segment Information - Summary_3

Segment Information - Summary of Revenues by Classes of Similar Products or Services (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of products and services [Line Items]
Revenue	$ 5,984	$ 5,906
Electronic, software and services [member]
Disclosure of products and services [Line Items]
Revenue	5,364	5,213
Global Print [member]
Disclosure of products and services [Line Items]
Revenue	$ 620	$ 693

Operating Expenses - Components

Operating Expenses - Components of Operating Expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating Expenses 1 [abstract]
Salaries, commissions and allowances	$ 2,269	$ 2,431
Share-based payments	64	56
Post-employment benefits	135	130
Total staff costs	2,468	2,617
Goods and services	1,158	1,411
Content	274	265
Telecommunications	54	48
Facilities	55	72
Fair value adjustments	(10)	0
Total operating expenses	$ 3,999	$ 4,413

Operating Expenses - Componen_2

Operating Expenses - Components of Operating Expenses (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Operating Expenses 1 [abstract]
Restructuring charges	$ 117

Other Operating Gains Net - Add

Other Operating Gains Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Other Operating Gains [Line Items]
Other operating (losses) gains, net	$ 736	$ 423
Revaluation of warrants	82	419
Gain on amendment to company's pension plan	78	$ (53)
Pension defined benefit plans [member]
Disclosure of Other Operating Gains [Line Items]
Gain on amendment to company's pension plan	119
Investments accounted for using equity method [member]
Disclosure of Other Operating Gains [Line Items]
Gain on sale of equity method investment	$ 472

Finance Costs, Net - Components

Finance Costs, Net - Components of Finance Costs, Net, Include Interest Expense (Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest expense:
Debt	$ 156	$ 155
Derivative financial instruments - hedging activities	(1)	2
Other, net	14	18
Fair value gains on financial instruments:
Net foreign exchange losses on debt	(97)	(21)
Cash flow hedges, transfer from equity	97	21
Net interest expense - debt and other	169	175
Net interest expense - leases	10	7
Net interest expense - pension and other post-employment benefit plans	21	25
Interest income	(5)	(44)
Net interest expense	$ 195	$ 163

Finance Costs, Net - Componen_2

Finance Costs, Net - Components of Finance Costs, Net, Include Other Finance Costs (Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Material income and expense [abstract]
Net (gains) losses due to changes in foreign currency exchange rates	$ (9)	$ 37
Net (gains) losses on derivative instruments	(21)	7
Losses from redemption of debt securities		19
Other		2
Other finance (income) costs	$ (30)	$ 65

Equity Method Investments - Sha

Equity Method Investments - Share of Post-tax (Losses) Earnings in Equity Method Investments Reported in Consolidated Income Statement (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of associates [line items]
Total share of post-tax losses in equity method investments	$ (544)	$ (599)
Refinitiv [member]
Disclosure of associates [line items]
Total share of post-tax losses in equity method investments	(554)	(609)
Other equity method investments [member]
Disclosure of associates [line items]
Total share of post-tax losses in equity method investments	$ 10	$ 10

Equity Method Investments - S_2

Equity Method Investments - Share of Post-tax (Losses) Earnings in Equity Method Investments Reported in Consolidated Income Statement (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Refinitiv [member]
Disclosure of associates [line items]
Percentage of voting equity interests	45.00%	45.00%

Equity Method Investments - Add

Equity Method Investments - Additional Information (Detail) shares in Millions	Dec. 31, 2020shares
Blackstone [Member]
Disclosure of associates [line items]
Percentage Of Ownership Interest Held By Private equity funds	55.00%
Refinitiv [member]
Disclosure of associates [line items]
Percentage of voting equity interests acquired	45.00%
Total number of share issued - warrant exercise	4.5

Equity Method Investments - Sum

Equity Method Investments - Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of associates [line items]
Total equity method investments	$ 1,136	$ 1,551
Refinitiv [member]
Disclosure of associates [line items]
Total equity method investments	981	1,387
Other equity method investments [member]
Disclosure of associates [line items]
Total equity method investments	$ 155	$ 164

Equity Method Investments - S_3

Equity Method Investments - Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Refinitiv [member]
Disclosure of associates [line items]
Percentage of voting equity interests	45.00%	45.00%

Equity Method Investments - S_4

Equity Method Investments - Summary of Financial Information for Refinitiv with Reconciliation to Thomson Reuters Carrying Value of its Investment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Assets
Current assets	$ 3,975	$ 3,071
Total assets	17,881	17,295
Revenues	5,984	5,906
Liabilities
Current liabilities	2,652	3,219
Total liabilities	7,901	7,735
Net loss	1,122	1,564
Net loss attributable to Refinitiv	1,122	1,564
Total comprehensive income	1,278	1,616
Thomson Reuters carrying amount	1,136	1,551
Refinitiv [member]
Assets
Current assets	2,071	2,031
Non-current assets	21,094	20,709
Total assets	23,165	22,740
Revenues	6,513	6,250
Liabilities
Current liabilities	3,995	3,398
Non-current liabilities	14,268	13,964
Total liabilities	18,263	17,362
Net loss	(1,137)	(1,278)
Net assets	4,902	5,378
Remove: Net earnings attributable to non-controlling interests	(95)	(75)
Non-controlling interests	(2,415)	(2,100)
Other	(306)	(195)
Net assets attributable to Refinitiv, Beginning balance	3,083	4,514
Net loss attributable to Refinitiv	(1,232)	(1,353)
Other comprehensive income (loss) attributable to Refinitiv	330	(78)
Total comprehensive income	(902)	(1,431)
Net assets attributable to Refinitiv, Ending balance	$ 2,181	$ 3,083
Thomson Reuters % share	45.00%	45.00%
Thomson Reuters carrying amount	$ 981	$ 1,387

Equity Method Investments - S_5

Equity Method Investments - Summary of Financial Information for Refinitiv with Reconciliation to Thomson Reuters Carrying Value of its Investment Parenthetical (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Refinitiv [member]
Disclosure of associates [line items]
Percentage of voting equity interests	45.00%	45.00%

Taxation - Additional Informati

Taxation - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Income Taxes [Line Items]
Income taxes rate	26.50%	26.50%
Effective income tax expense (benefit) rate	5.80%
Percentage of increase in effective tax rate	1.00%
Sensitivity to change in effective tax rate	$ 12
Deferred tax benefit	(231)	$ (1,395)
Deferred tax asset	1,204	1,176
Assets owned by foreign subsidiary [Member]
Disclosure Of Income Taxes [Line Items]
Deferred tax benefit	$ (138)	(1,200)
Deferred tax asset		$ 1,200

Taxation - Components of Tax Ex

Taxation - Components of Tax Expense (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Major components of tax expense (income) [abstract]
Current tax expense	$ 302	$ 197
Deferred tax benefit	(231)	(1,395)
Total tax expense (benefit)	$ 71	$ (1,198)

Taxation - Schedule of Taxes on

Taxation - Schedule of Taxes on items Recognized in other Comprehensive loss or Directly in Equity (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Income Taxes [Line Items]
Deferred tax expense (benefit) on actuarial gains (losses) on defined benefit plans	$ (17)	$ 12
Deferred tax expense (benefit) on share of other comprehensive income (loss) in equity method investments - may be subsequently reclassified to net earnings	35	(7)
Deferred tax expense (benefit) on share of other comprehensive income (loss) in equity method investments - will not be reclassified to net earnings	1	(2)
Employee benefits [member]
Disclosure Of Income Taxes [Line Items]
Deferred tax expense (benefit) on actuarial gains (losses) on defined benefit plans	17	(12)
Deferred and share-based compensation [member]
Disclosure Of Income Taxes [Line Items]
Deferred tax benefit on share-based payments	(3)	(8)
Current tax benefit on share-based payments	$ (11)	$ (20)

Taxation - Schedule of Reconcil

Taxation - Schedule of Reconciliation of Income Tax Expense Benefit (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Income before tax	$ 1,220	$ 372
Income before tax multiplied by the standard rate of Canadian corporate tax of 26.5%	323	99
Income taxes recorded at rates different from the Canadian tax rate	(167)	(159)
Tax losses for which no benefit is recognized	1	1
Reorganization of certain foreign affiliate operations		(1,197)
Net non-deductible foreign exchange and other losses	6	42
Impact of disposals of businesses		(66)
Tax on reversal of statutory intercompany investment impairments	905
Recognition of tax losses that arose in prior years due to statutory intercompany investment impairments	(905)
Provision for uncertain tax provisions	10	(46)
Derecognition of tax losses that arose in prior years		88
Recognition of tax losses that arose in prior years	(138)	(29)
U.S. base erosion minimum tax	43	7
Impact of tax law changes		52
Research and development credits	(12)	(6)
Other adjustments related to prior years	(6)	3
Withholding taxes	6	3
Other differences	5	10
Total tax expense (benefit)	$ 71	$ (1,198)

Taxation - Schedule of Reconc_2

Taxation - Schedule of Reconciliation of Income Tax Expense Benefit (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Applicable tax rate	26.50%	26.50%

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income loss from continuing and discontinued operations [line items]
Loss from discontinued operations, after tax	$ (27)	$ (6)
Discontinued operations [member]
Income loss from continuing and discontinued operations [line items]
Loss from discontinued operations, after tax	(27)	(6)
Tax benefit (expense) on (loss) earnings from discontinued operations	$ 15	$ 31

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail)	Dec. 31, 2020	Dec. 31, 2019
Earnings per share [abstract]
Anti-dilutive share-based compensation awards outstanding	557,056	0

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation of Earnings Used for Earnings per Share Calculations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings per share [abstract]
Earnings attributable to common shareholders	$ 1,122	$ 1,564
Less: Dividends declared on preference shares	(2)	(3)
Earnings used in consolidated earnings per share	1,120	1,561
Less: Loss from discontinued operations, net of tax	27	6
Earnings used in earnings per share from continuing operations	$ 1,147	$ 1,567

Earnings Per Share - Weighted A

Earnings Per Share - Weighted Average Common Shares (Detail) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]
Weighted-average number of common shares outstanding	496,343,778	500,395,573
Weighted-average number of vested DSUs	378,514	434,180
Basic	496,722,292	500,829,753
Effect of stock options and TRSUs	1,309,714	1,691,447
Diluted	498,032,006	502,521,200

Cash and Cash Equivalents - Add

Cash and Cash Equivalents - Additional information (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents [abstract]
Restricted cash and cash equivalents	$ 43	$ 34

Cash and Cash Equivalents - Sum

Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents [abstract]
Cash at bank and on hand	$ 311	$ 335
Money market accounts	1,476	490
Cash and cash equivalents	$ 1,787	$ 825

Trade and Other Receivables - S

Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Trade and other receivables [abstract]
Trade receivables	$ 1,195	$ 1,184
Less: allowance for doubtful accounts	(37)	(30)	$ (30)
Less: allowance for sales adjustments	(36)	(34)
Net trade receivables	1,122	1,120
Other receivables	29	47
Trade and other receivables	$ 1,151	$ 1,167

Trade and Other Receivables -_2

Trade and Other Receivables - Summary of Trade and Other Receivables (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of Trade and Other Receivables [Line items]
Other receivables	$ 29	$ 47
Expected credit losses	37	30	$ 30
Refinitiv [member]
Disclosure of Trade and Other Receivables [Line items]
Other receivables	11	$ 27
Expected credit losses	$ 0

Trade and Other Receivables -_3

Trade and Other Receivables - Schedule of Aging of Gross Trade Receivables (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Aging of Trade Receivables [Line Items]
Gross trade receivables	$ 1,195	$ 1,184
Current [member]
Aging of Trade Receivables [Line Items]
Gross trade receivables	751	806
Less Than One Month Past Due [member]
Aging of Trade Receivables [Line Items]
Gross trade receivables	195	185
Later than one month and not later than two months [member]
Aging of Trade Receivables [Line Items]
Gross trade receivables	72	63
Later than two months and not later than three months [member]
Aging of Trade Receivables [Line Items]
Gross trade receivables	42	36
Later than three months [member]
Aging of Trade Receivables [Line Items]
Gross trade receivables	$ 135	$ 94

Trade and Other Receivables -_4

Trade and Other Receivables - Schedule of Change in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]
Balance at beginning of year	$ 30	$ 30
Charges	51	29
Write-offs	(44)	(28)
Disposals of businesses		(1)
Balance at end of year	$ 37	$ 30

Prepaid Expenses and Other Cu_3

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Prepaid Expenses And Other Current Assets [Abstract]
Inventory	$ 26	$ 23
Prepaid expenses	126	130
Current tax receivables	65	72
Deferred commissions	127	117
Other current assets	81	204
Prepaid expenses and other current assets	$ 425	$ 546

Prepaid Expenses and Other Cu_4

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Prepaid Expenses And Other Current Assets [Abstract]
Uncertain tax positions current	$ 9	$ 9

Property and Equipment - Summar

Property and Equipment - Summary of Property and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	$ 615
Ending balance	545	$ 615
Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	1,962	1,826
Impact of IFRS 16 adoption		128
Capital expenditures	66	108
Leases	55	184
Acquisitions		7
Removed from service	(34)	(138)
Disposals of businesses	(16)	(182)
Translation and other, net	(31)	29
Ending balance	2,002	1,962
Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(1,347)	(1,353)
Removed from service	34	138
Disposals of businesses	11	49
Translation and other, net	29	(27)
Ending balance	(1,457)	(1,347)
Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Current year depreciation	(184)	(154)
Land, buildings and building improvements [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	417
Ending balance	369	417
Land, buildings and building improvements [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	898	757
Impact of IFRS 16 adoption		126
Capital expenditures	19	46
Leases	21	143
Acquisitions		1
Removed from service	(19)	(3)
Disposals of businesses	(10)	(168)
Translation and other, net	5	(4)
Ending balance	914	898
Land, buildings and building improvements [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(481)	(441)
Removed from service	19	3
Disposals of businesses	7	38
Translation and other, net	15	3
Ending balance	(545)	(481)
Land, buildings and building improvements [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Current year depreciation	(105)	(84)
Computer equipment [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	118
Ending balance	108	118
Computer equipment [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	752	774
Capital expenditures	24	46
Leases	32	41
Acquisitions		3
Removed from service	(12)	(130)
Disposals of businesses		(13)
Translation and other, net	(4)	31
Ending balance	792	752
Computer equipment [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(634)	(687)
Removed from service	12	130
Disposals of businesses		10
Translation and other, net	2	(33)
Ending balance	(684)	(634)
Computer equipment [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Current year depreciation	(64)	(54)
Furniture, fixtures and other equipment [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	80
Ending balance	68	80
Furniture, fixtures and other equipment [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	312	295
Impact of IFRS 16 adoption		2
Capital expenditures	23	16
Leases	2
Acquisitions		3
Removed from service	(3)	(5)
Disposals of businesses	(6)	(1)
Translation and other, net	(32)	2
Ending balance	296	312
Furniture, fixtures and other equipment [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning balance	(232)	(225)
Removed from service	3	5
Disposals of businesses	4	1
Translation and other, net	12	3
Ending balance	(228)	(232)
Furniture, fixtures and other equipment [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Current year depreciation	$ (15)	$ (16)

Computer Software - Schedule of

Computer Software - Schedule of Changes in Computer Software (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	$ 900
Balance at end of year	830	$ 900
Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Acquisitions	23	309
Disposals of businesses		(18)
Computer software [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization	(485)	(449)
Computer software [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	4,464	4,183
Acquisitions	25	82
Removed from service	(57)	(66)
Disposals of businesses	(60)	(144)
Translation and other, net	(2)	6
Balance at end of year	4,771	4,464
Computer software [member] | Gross carrying amount [member] | Internally generated [member]
Disclosure of detailed information about intangible assets [line items]
Additions	397	388
Computer software [member] | Gross carrying amount [member] | Not internally generated [member]
Disclosure of detailed information about intangible assets [line items]
Additions	4	15
Computer software [member] | Accumulated Amortization [Member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	(3,564)	(3,275)
Current year amortization	(485)	(449)
Removed from service	57	66
Disposals of businesses	49	94
Translation and other, net	2	0
Balance at end of year	$ (3,941)	$ (3,564)

Other Identifiable Intangible A

Other Identifiable Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	Oct. 01, 2020	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Goodwill impairment	$ 0
Reuters [member]
Disclosure of detailed information about intangible assets [line items]
Trade Name		$ 1,939	$ 1,939
West [member]
Disclosure of detailed information about intangible assets [line items]
Trade Name		$ 707	$ 707

Other Identifiable Intangible_2

Other Identifiable Intangible Assets - Summary of Other Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	$ 3,518
Balance at end of year	3,427	$ 3,518
Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	6,007	5,804
Acquisitions	23	309
Removed from service	(30)
Disposals of businesses		(118)
Translation and other, net	20	12
Balance at end of year	6,020	6,007
Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	(2,489)	(2,480)
Removed from service	30
Disposals of businesses		118
Translation and other, net	(11)	(13)
Balance at end of year	(2,593)	(2,489)
Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization	(123)	(114)
Trade names indefinite useful life [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	2,646
Balance at end of year	2,646	2,646
Trade names indefinite useful life [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	2,646	2,646
Acquisitions		0
Removed from service
Disposals of businesses		0
Translation and other, net		0
Balance at end of year	2,646	2,646
Trade names indefinite useful life [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	0	0
Removed from service
Disposals of businesses		0
Translation and other, net		0
Balance at end of year		0
Trade names indefinite useful life [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization		0
Finite useful life trade names finite useful life [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	43
Balance at end of year	30	43
Finite useful life trade names finite useful life [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	166	153
Acquisitions	2	40
Removed from service	(18)
Disposals of businesses		(28)
Translation and other, net	(3)	1
Balance at end of year	147	166
Finite useful life trade names finite useful life [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	(123)	(146)
Removed from service	18
Disposals of businesses		28
Translation and other, net	(2)	0
Balance at end of year	(117)	(123)
Finite useful life trade names finite useful life [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization	(10)	(5)
Customer relationships [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	685
Balance at end of year	640	685
Customer relationships [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	1,810	1,595
Acquisitions	21	268
Removed from service
Disposals of businesses		(72)
Translation and other, net	13	19
Balance at end of year	1,844	1,810
Customer relationships [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	(1,125)	(1,122)
Removed from service
Disposals of businesses		72
Translation and other, net	2	(9)
Balance at end of year	(1,204)	(1,125)
Customer relationships [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization	(81)	(66)
Databases and content [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	119
Balance at end of year	98	119
Databases and content [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	639	669
Acquisitions		1
Removed from service
Disposals of businesses		(18)
Translation and other, net	1	(13)
Balance at end of year	640	639
Databases and content [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	(520)	(514)
Removed from service
Disposals of businesses		18
Translation and other, net	(1)	(2)
Balance at end of year	(542)	(520)
Databases and content [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization	(21)	(22)
Other identifiable intangible assets [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	25
Current year amortization	(123)	(114)
Balance at end of year	13	25
Other identifiable intangible assets [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	746	741
Acquisitions		0
Removed from service	(12)
Disposals of businesses		0
Translation and other, net	9	5
Balance at end of year	743	746
Other identifiable intangible assets [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Balance at beginning of year	(721)	(698)
Removed from service	12
Disposals of businesses		0
Translation and other, net	(10)	(2)
Balance at end of year	(730)	(721)
Other identifiable intangible assets [member] | Continuing Operations [member] | Accumulated depreciation [member]
Disclosure of detailed information about intangible assets [line items]
Current year amortization	$ (11)	$ (21)

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - USD ($) $ in Millions	Oct. 01, 2020	Dec. 31, 2020
Percentage of valuation technique
Goodwill impairment	$ 0
Income approach [member]
Percentage of valuation technique
Percentage Of Valuation Techniques		60.00%
Market approach [member]
Percentage of valuation technique
Percentage Of Valuation Techniques		40.00%
Cash generating units [Member]
Percentage of valuation technique
Goodwill impairment test	100.00%	100.00%

Goodwill - Summary of Goodwill

Goodwill - Summary of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of changes in goodwill [Line Items]
Balance at beginning of year	$ 5,853
Balance at end of year	5,976	$ 5,853
Gross carrying amount [member]
Disclosure of reconciliation of changes in goodwill [Line Items]
Balance at beginning of year	5,853	5,076
Acquisitions	133	715
Disposals of businesses		(18)
Translation and other, net	(10)	80
Balance at end of year	$ 5,976	$ 5,853

Goodwill - Summary of Carrying

Goodwill - Summary of Carrying Amount of Goodwill by Cash Generating Unit (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Oct. 01, 2020	Dec. 31, 2019
Disclosure of information for cash-generating units [Line Items]
Goodwill	$ 5,976		$ 5,853
Legal Professionals [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill		$ 3,353
Corporates [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill		1,294
Tax & Accounting Professionals [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill		869
Reuters News [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill		137
Global Print [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill		$ 248

Goodwill - Impairment Test of G

Goodwill - Impairment Test of Goodwill- Key Assumptions (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of information for cash-generating units [Line Items]
Tax Rate	26.50%	26.50%
Legal Professionals [member]
Disclosure of information for cash-generating units [Line Items]
Perpetual growth rate	2.50%
Discount rate	7.00%
Tax Rate	25.60%
Corporates [member]
Disclosure of information for cash-generating units [Line Items]
Perpetual growth rate	2.50%
Discount rate	8.00%
Tax Rate	25.90%
Tax & Accounting Professionals [member]
Disclosure of information for cash-generating units [Line Items]
Perpetual growth rate	3.00%
Discount rate	8.50%
Tax Rate	26.80%
Reuters News [member]
Disclosure of information for cash-generating units [Line Items]
Perpetual growth rate	2.50%
Discount rate	9.00%
Tax Rate	20.80%
Global Print [member]
Disclosure of information for cash-generating units [Line Items]
Perpetual growth rate	(4.40%)
Discount rate	9.00%
Tax Rate	25.80%

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	Oct. 01, 2018	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [Line Items]
Notional amount		$ 999	$ 483
Foreign currency translation adjustments to OCI		(12)	109
Cash and cash equivalents		1,787	825
Interest Income Sensitivity		17	8
Trade and other receivables		1,151	1,167
Other financial assets		664	602
Fair value of contracts outstanding		$ (100)	$ 62
Percent of change in revenue due to foreign currency translation		1.00%	1.00%
Percent of change in operating expenses due to foreign currency translation		1.00%	1.00%
Targeted number of shares outstanding		500
Purchase price		$ 167	$ 998
Net Proceeds Used For General Corporate Purposes		999
Derivative financial assets		$ 100
Percentage strengthening of US dollar against other foreign currencies		10.00%
Target net debt to adjusted EBITDA		2.5x
Refinitiv [member]
Disclosure of detailed information about financial instruments [Line Items]
Total number of share issued - warrant exercise		4.5
Note Repayments Before Maturity [Member]
Disclosure of detailed information about financial instruments [Line Items]
Debt repaid		$ 640
Credit Facility Covenant- Acquisitions [Member]
Disclosure of detailed information about financial instruments [Line Items]
Purchase price		500
At fair value [member]
Disclosure of detailed information about financial instruments [Line Items]
Fair value of contracts outstanding			62
Derivative financial assets		100
Foreign Exchange Contracts [Member] | At fair value [member]
Disclosure of detailed information about financial instruments [Line Items]
Notional amount		0	111
Fair value of contracts outstanding			7
Interest rate risk [member]
Disclosure of detailed information about financial instruments [Line Items]
Cash and cash equivalents		$ 1,787	825
Description of increase decrease in interest rates basis point that would increase or decreased annual interest income		100-basis point
Credit risk [member]
Disclosure of detailed information about financial instruments [Line Items]
Cash and cash equivalents		$ 1,787	825
Percentage of cash and cash equivalents at A- or above rated institutions		99.00%
Derivative financial assets		$ 100
Cross-currency interest rate swaps [member]
Disclosure of detailed information about financial instruments [Line Items]
Fair value of contracts outstanding			62
Fair Value Gain (Loss) Through Earnings		10	0
Derivative financial assets		100
Commercial paper [member]
Disclosure of detailed information about financial instruments [Line Items]
Commercial paper programs		1,800
Commercial papers issued		$ 630	$ 0
Notes, Debentures and Commercial Paper [member]
Disclosure of detailed information about financial instruments [Line Items]
Weighted-average interest rate		4.10%	4.60%
Credit Facilities [Member]
Disclosure of detailed information about financial instruments [Line Items]
Gross loan commitments		$ 1,800
Amended Credit Facility Maturities In December 2024 [Member]
Disclosure of detailed information about financial instruments [Line Items]
Gross loan commitments		$ 1,800
Maturity date		December 2024
Credit facility, rate of interest added to reference rate		112.50%
Additional commitment from lenders		$ 600
Maximum CreditFacility Agreement		2,400
Proceeds from non-current borrowings		1,000
Repayments of non-current borrowings		$ 1,000
Ratio of net debt to ebitda under credit facility		1.0x
Top of range [member]
Disclosure of detailed information about financial instruments [Line Items]
Percentage of ownership held		50.00%
Top of range [member] | Amended Credit Facility Maturities In December 2024 [Member]
Disclosure of detailed information about financial instruments [Line Items]
Required ratio of net debt to ebitda		4.5
Top of range [member] | Amended Credit Facility Maturities In December 2024 [Member] | Scenario Forecast one [Member]
Disclosure of detailed information about financial instruments [Line Items]
Required ratio of net debt to ebitda		5
Refinitiv [member]
Disclosure of detailed information about financial instruments [Line Items]
Percentage of ownership held	45.00%	45.00%	45.00%
Total number of share issued - warrant exercise		4.5

Financial Instruments - Summary

Financial Instruments - Summary of Financial Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	$ 1,787	$ 825
Trade and other receivables	1,151	1,167
Other financial assets - current	612	533
Other financial assets – non-current	198	98
Current indebtedness		(579)
Trade payables	(217)	(265)
Accruals	(761)	(801)
Other financial liabilities - current	(376)	(434)
Long-term indebtedness	(3,772)	(2,676)
Other financial liabilities - non-current	(224)	(256)
Total	(1,602)	(2,388)
Assets/ (liabilities) at fair value through earnings [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	1,476	490
Other financial assets - current	517	435
Other financial assets – non-current	17	24
Other financial liabilities - current	(2)	(7)
Other financial liabilities - non-current	(1)	(3)
Total	2,007	939
Derivatives used for hedging [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	0
Other financial assets – non-current	100
Other financial liabilities - current		(62)
Total	100	(62)
Assets liabilities at amortized cost [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	311	335
Trade and other receivables	1,151	1,167
Other financial assets - current	95	98
Other financial assets – non-current	35	45
Current indebtedness		(579)
Trade payables	(217)	(265)
Accruals	(761)	(801)
Other financial liabilities - current	(374)	(365)
Long-term indebtedness	(3,772)	(2,676)
Other financial liabilities - non-current	(223)	(253)
Total	(3,755)	(3,294)
Assets at Fair Value through Other Comprehensive Income [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Other financial assets – non-current	46	29
Total	$ 46	$ 29

Financial Instruments - Summa_2

Financial Instruments - Summary of Financial Assets and Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Share Capital [Line Items]
Other financial liabilities	$ 376	$ 434
Current lease liabilities	83	69
Non-current lease liabilities	223	253
Share Repurchase Program [Member]
Disclosure Of Share Capital [Line Items]
Other financial liabilities	$ 200	$ 200

Financial Instruments - Summa_3

Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	$ 3,772	$ 3,255
Derivative financial assets	(100)
Current portion		579
Long-term portion	3,772	2,676
Derivative instrument liability	(100)	62
Derivative instrument liability, current portion		62
Derivative instrument Asset, Long-term portion	(100)
At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative financial assets	(100)
Derivative instrument liability		62
3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability		62
3.309% notes, due 2021 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability		62
2.239% Notes, due 2025 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative financial assets	(100)
2.239% Notes, due 2025 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative financial assets	(100)
Primary debt instruments [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	3,772	3,255
Current portion		579
Long-term portion	3,772	2,676
Primary debt instruments [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	4,459	3,556
Primary debt instruments [member] | Bank and Other [Member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		1
Primary debt instruments [member] | Bank and Other [Member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		1
Primary debt instruments [member] | 3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		435
Primary debt instruments [member] | 3.309% notes, due 2021 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		435
Primary debt instruments [member] | 3.95% Notes, Due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		143
Primary debt instruments [member] | 3.95% Notes, Due 2021 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		143
Primary debt instruments [member] | 2.239% Notes, due 2025 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	1,093
Primary debt instruments [member] | 2.239% Notes, due 2025 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	1,151
Primary debt instruments [member] | 4.30% notes, due 2023 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	597	596
Primary debt instruments [member] | 4.30% notes, due 2023 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	657	639
Primary debt instruments [member] | 3.85% Notes, Due 2024 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	241	240
Primary debt instruments [member] | 3.85% Notes, Due 2024 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	266	254
Primary debt instruments [member] | 3.35% notes, due 2026 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	497	496
Primary debt instruments [member] | 3.35% notes, due 2026 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	557	513
Primary debt instruments [member] | 4.50% Notes, Due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	116	116
Primary debt instruments [member] | 4.50% Notes, Due 2043 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	130	120
Primary debt instruments [member] | 5.65% notes, due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	342	342
Primary debt instruments [member] | 5.65% notes, due 2043 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	471	412
Primary debt instruments [member] | 5.50% debentures, due 2035 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	395	395
Primary debt instruments [member] | 5.50% debentures, due 2035 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	531	447
Primary debt instruments [member] | 5.85% debentures, due 2040 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	491	491
Primary debt instruments [member] | 5.85% debentures, due 2040 [member] | At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	$ 696	$ 592

Financial Instruments - Summa_4

Financial Instruments - Summary of Debt and Related Derivative Instruments (Parenthetical) (Detail) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020CAD ($)	Dec. 31, 2019CAD ($)
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 999	$ 483
2.239% Notes, due 2025 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount			$ 1,400
Debt instrument, interest rate	2.239%		2.239%
Debt instrument, maturity year	2025
Debt instrument, original currency	CAD
3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount				$ 550
Debt instrument, interest rate		3.309%		3.309%
Debt instrument, maturity year		2021
Debt instrument, original currency		CAD
3.95% Notes, Due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount		$ 350
Debt instrument, interest rate		3.95%		3.95%
Debt instrument, maturity year		2021
Debt instrument, original currency		USD
4.30% notes, due 2023 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 600	$ 600
Debt instrument, interest rate	4.30%	4.30%	4.30%	4.30%
Debt instrument, maturity year	2023	2023
Debt instrument, original currency	USD	USD
3.85% Notes, Due 2024 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 450	$ 450
Debt instrument, interest rate	3.85%	3.85%	3.85%	3.85%
Debt instrument, maturity year	2024	2024
Debt instrument, original currency	USD	USD
3.35% notes, due 2026 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 500	$ 500
Debt instrument, interest rate	3.35%	3.35%	3.35%	3.35%
Debt instrument, maturity year	2026	2026
Debt instrument, original currency	USD	USD
4.50% Notes, Due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 350	$ 350
Debt instrument, interest rate	4.50%	4.50%	4.50%	4.50%
Debt instrument, maturity year	2043	2043
Debt instrument, original currency	USD	USD
5.65% notes, due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 350	$ 350
Debt instrument, interest rate	5.65%	5.65%	5.65%	5.65%
Debt instrument, maturity year	2043	2043
Debt instrument, original currency	USD	USD
5.50% debentures, due 2035 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 400	$ 400
Debt instrument, interest rate	5.50%	5.50%	5.50%	5.50%
Debt instrument, maturity year	2035	2035
Debt instrument, original currency	USD	USD
5.85% debentures, due 2040 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 500	$ 500
Debt instrument, interest rate	5.85%	5.85%	5.85%	5.85%
Debt instrument, maturity year	2040	2040
Debt instrument, original currency	USD	USD

Financial Instruments - Summa_5

Financial Instruments - Summary of Information Regarding Notes Repaid (Detail) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020CAD ($)
Disclosure of detailed information about borrowings [Line Items]
Debt instrument, principal amount	$ 999	$ 483
3.95% Notes, Due 2021 [member]
Disclosure of detailed information about borrowings [Line Items]
Debt instrument, maturity year		2021
Debt instrument, interest rate		3.95%
Debt instrument, principal amount		$ 350
Redemption of notes [member] | 3.95% Notes, Due 2021 [member]
Disclosure of detailed information about borrowings [Line Items]
Debt instrument, maturity year	2021
Notes, repaid date	January 2020
Debt instrument, interest rate	3.95%		3.95%
Debt instrument, principal amount	$ 139
Redemption of notes [member] | 3.309% Notes, Due 2021 [member]
Disclosure of detailed information about borrowings [Line Items]
Debt instrument, maturity year	2021
Notes, repaid date	January 2020
Debt instrument, interest rate	3.309%		3.309%
Debt instrument, principal amount			$ 550
Transaction notes issued [Member] | 2.239% Notes, Due 2025 [member]
Disclosure of detailed information about borrowings [Line Items]
Debt instrument, maturity year	2025
Notes issued for transaction	May 2020
Debt instrument, interest rate	2.239%		2.239%
Debt instrument, principal amount			$ 1,400

Financial Instruments - Outstan

Financial Instruments - Outstanding Instruments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about hedges [Line Items]
Currency received	Canadian dollar fixed	Canadian dollar fixed
Currency paid	U.S. dollar fixed	U.S. dollar fixed
Hedged Risk	Foreign exchange	Foreign exchange
Year of Maturity	2025	2020
Principal Amount	$ 999	$ 483

Financial Instruments - Cross C

Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about hedges [Line Items]
Borrowings after currency hedging arrangements	$ 3,672	$ 3,317
Borrowings before currency hedging arrangements	3,772	3,255
Canada, Dollars [member]
Disclosure of detailed information about hedges [Line Items]
Borrowings before currency hedging arrangements	1,093	435
United States of America, Dollars [member]
Disclosure of detailed information about hedges [Line Items]
Borrowings after currency hedging arrangements	3,672	3,316
Borrowings before currency hedging arrangements	$ 2,679	2,819
Other Currencies [member]
Disclosure of detailed information about hedges [Line Items]
Borrowings after currency hedging arrangements		1
Borrowings before currency hedging arrangements		$ 1

Financial Instruments - Cross_2

Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Parenthetical) (Detail) $ in Millions	Dec. 31, 2019USD ($)
Disclosure of detailed information about hedges [abstract]
Fair value - interest component of cross-currency interest rate swaps	$ 3

Financial Instruments - Currenc

Financial Instruments - Currency Risk- Sensitivity Analysis (Detail) - Ten percentage weakening in foreign currency vs us [member] $ in Millions	Dec. 31, 2020USD ($)
Summary of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [line items]
Impact on earnings from financial assets and liabilities	$ 2
Impact on earnings from non-permanent intercompany loans	21
Total impact on earnings	23
British Pounds Sterling [Member]
Summary of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [line items]
Impact on earnings from non-permanent intercompany loans	(21)
Total impact on earnings	(21)
Euros [member]
Summary of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [line items]
Impact on earnings from financial assets and liabilities	(1)
Impact on earnings from non-permanent intercompany loans	(3)
Total impact on earnings	(4)
Other Currencies [member]
Summary of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [line items]
Impact on earnings from financial assets and liabilities	3
Impact on earnings from non-permanent intercompany loans	(7)
Total impact on earnings	(4)
Canada, Dollars [member]
Summary of Hypothetical Change In Foreign Currency Exchange Rates On Earnings [line items]
Impact on earnings from non-permanent intercompany loans	52
Total impact on earnings	$ 52

Financial Instruments - Fair Va

Financial Instruments - Fair Value Gains and Losses from Derivative Financial Instruments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	$ 201	$ 432
Fair Value Gain (Loss) Through Equity	(11)	(6)
Foreign exchange contracts [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	11	(7)
Cross-currency interest rate swaps [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	107	19
Fair Value Gain (Loss) Through Equity	(11)	(6)
Forward interest rate swaps - cash flow hedges [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	1	1
Warrants [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	$ 82	$ 419

Financial Instruments - Fair _2

Financial Instruments - Fair Value Gains and Losses from Derivative Financial Instruments (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	$ 201	$ 432
Cross-currency interest rate swaps [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	107	19
Hedged interest expense [member] | Cross-currency interest rate swaps [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	97	21
Ineffective Hedge [Member] | Cross-currency interest rate swaps [member]
Gains (losses) on change in fair value of derivatives [line items]
Gain (loss) on Hedge Ineffectiveness	10	0
Early redemption of debt securities [member] | Cross-currency interest rate swaps [member]
Gains (losses) on change in fair value of derivatives [line items]
Fair Value Gain (Loss) Through Earnings	$ 0	$ (2)

Financial Instruments - Disclos

Financial Instruments - Disclosure of maturity analysis for non-derivative and derivative financial liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		$ 579
Long-term debt	$ 3,772	2,676
Trade payables	217	265
Accruals	761	801
Lease liabilities	306	322
Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		579
Long-term debt	3,810	2,711
Interest payable	1,794	1,814
Debt-related hedges outflows	1,098	499
Debt-related hedges inflows	(1,210)	(437)
Trade payables	217	265
Accruals	761	801
Lease liabilities	329	354
Other financial liabilities	291	295
Total	7,090	6,881
Not later than one year [member] | Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		579
Long-term debt	0	0
Interest payable	153	132
Debt-related hedges outflows	22	499
Debt-related hedges inflows	(25)	(437)
Trade payables	217	265
Accruals	761	801
Lease liabilities	92	80
Other financial liabilities	291	295
Total	1,511	2,214
Later than one year and not later than two years [member] | Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		0
Long-term debt	0	0
Interest payable	153	128
Debt-related hedges outflows	22	0
Debt-related hedges inflows	(25)	0
Trade payables	0	0
Accruals	0	0
Lease liabilities	76	75
Other financial liabilities	0	0
Total	226	203
Later than two years and not later than three years [member] | Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		0
Long-term debt	600	0
Interest payable	153	128
Debt-related hedges outflows	22	0
Debt-related hedges inflows	(25)	0
Trade payables	0	0
Accruals	0	0
Lease liabilities	49	60
Other financial liabilities	0	0
Total	799	188
Later than three years and not later than four years [member] | Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		0
Long-term debt	242	600
Interest payable	127	128
Debt-related hedges outflows	22	0
Debt-related hedges inflows	(25)	0
Trade payables	0	0
Accruals	0	0
Lease liabilities	39	41
Other financial liabilities	0	0
Total	405	769
Later than four years and not later than five years [member] | Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		0
Long-term debt	1,099	242
Interest payable	105	102
Debt-related hedges outflows	1,010	0
Debt-related hedges inflows	(1,110)	0
Trade payables	0	0
Accruals	0	0
Lease liabilities	29	34
Other financial liabilities	0	0
Total	1,133	378
Later than five years [member] | Undiscounted Cash Flow [member]
Disclosure of maturity analysis for derivative and non-derivative financial liabilities [line items]
Current debt		0
Long-term debt	1,869	1,869
Interest payable	1,103	1,196
Debt-related hedges outflows	0	0
Debt-related hedges inflows	0	0
Trade payables	0	0
Accruals	0	0
Lease liabilities	44	64
Other financial liabilities	0	0
Total	$ 3,016	$ 3,129

Financial Instruments - Summa_6

Financial Instruments - Summary of Credit Ratings (Detail)	12 Months Ended
	Dec. 31, 2020
Moodys [member]
Disclosure of credit risk exposure [Line Items]
Long-term debt	Baa2
Commercial paper	P-2
Trend/Outlook	Stable
S&P Global Ratings [Member]
Disclosure of credit risk exposure [Line Items]
Long-term debt	BBB
Commercial paper	A-2
Trend/Outlook	Stable
DBRS Limited [Member]
Disclosure of credit risk exposure [Line Items]
Long-term debt	BBB (high)
Commercial paper	R-2 (high)
Trend/Outlook	Stable
Fitch [member]
Disclosure of credit risk exposure [Line Items]
Long-term debt	BBB+
Commercial paper	F1
Trend/Outlook	Stable

Financial Instruments - Net Deb

Financial Instruments - Net Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Borrowings [abstract]
Current indebtedness		$ 579
Long-term indebtedness	$ 3,772	2,676
Total debt	3,772	3,255
Swaps	(100)	62
Total debt after swaps	3,672	3,317
Remove fair value adjustments for hedges	1
Total debt after currency hedging arrangements	3,673	3,317
Remove transaction costs and discounts included in the carrying value of debt	38	36
Add: Lease liabilities (current and non-current)	306	322
Less: cash and cash equivalents	(1,787)	(825)
Net debt	$ 2,230	$ 2,850

Financial Instruments - Reconci

Financial Instruments - Reconciliation of Movements of Liabilities to Cash Flows Arising from Financing Activities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Balance at beginning of year	$ 3,639	$ 3,292
Proceeds from debt	2,019
Repayments of debt	(1,645)
Foreign exchange movements	4
Other, net	(22)	25
Payments of lease principal	(75)	(51)
IFRS 16 adoption - January 1, 2019		197
Additional Leases	58	176
Balance at end of year	3,978	3,639
Notes And Debentures [member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Balance at beginning of year	3,255	3,216
Proceeds from debt	999
Repayments of debt	(560)
Foreign exchange movements	97	21
Other, net	(19)	18
Balance at end of year	3,772	3,255
Commercial paper / credit facilities [member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Balance at beginning of year	0	0
Proceeds from debt	1,020
Repayments of debt	(1,020)
Balance at end of year		0
Derivative Instruments Liabilities (Assets) [member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Balance at beginning of year	62	76
Repayments of debt	(65)
Foreign exchange movements	(97)	(21)
Other, net		7
Balance at end of year	(100)	62
Leases Liabilities [Member]
Disclosure of reconciliation of liabilities arising from financing activities [Line Items]
Balance at beginning of year	322
Foreign exchange movements	4
Other, net	(3)
Payments of lease principal	(75)	(51)
IFRS 16 adoption - January 1, 2019		197
Additional Leases	58	176
Balance at end of year	$ 306	$ 322

Financial Instruments - Summa_7

Financial Instruments - Summary of Fair Value Measurements Carried at Fair Value in the Consolidated Statement of Financial Position (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Money market accounts	$ 1,476	$ 490
Warrants	517	435
Other receivables	17	24
Derivative financial asset held for hedging	100
Financial assets at fair value through earnings	2,010	949
Financial assets at fair value through other comprehensive income	46	29
Total assets	2,156	978
Liabilities
Forward exchange contracts		(7)
Contingent consideration	(3)	(3)
Financial liabilities at fair value through earnings	(3)	(10)
Derivatives used for hedging		(62)
Total liabilities	(3)	(72)
Level 1 [member]
Assets
Financial assets at fair value through earnings	0
Financial assets at fair value through other comprehensive income	27	2
Total assets	27	2
Level 2 [member]
Assets
Money market accounts	1,476	490
Derivative financial asset held for hedging	100
Financial assets at fair value through earnings	1,476	490
Financial assets at fair value through other comprehensive income	19	27
Total assets	1,595	517
Liabilities
Forward exchange contracts		(7)
Financial liabilities at fair value through earnings		(7)
Derivatives used for hedging		(62)
Total liabilities		(69)
Level 3 [member]
Assets
Warrants	517	435
Other receivables	17	24
Financial assets at fair value through earnings	534	459
Total assets	534	459
Liabilities
Contingent consideration	(3)	(3)
Financial liabilities at fair value through earnings	(3)	(3)
Derivatives used for hedging		0
Total liabilities	$ (3)	$ (3)

Financial Instruments - Schedul

Financial Instruments - Schedule of Changes in Refinitv Warrants Level 3 Fair Value Measurement (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value measurement of assets [line items]
Beginning Balance	$ 435
Ending Balance	517	$ 435
Level 3 [member]
Disclosure of fair value measurement of assets [line items]
Beginning Balance	435
Ending Balance	517	435
Level 3 [member] | Warrants [member]
Disclosure of fair value measurement of assets [line items]
Beginning Balance	435	16
Gain recognized within other operating gains, net	82	419
Ending Balance	$ 517	$ 435

Financial Instruments - Summa_8

Financial Instruments - Summary of Offsetting of Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross Financial Assets	$ 133	$ 17
Net Financial Assets in the Consolidated Statement of Financial Position	133	17
Net Amount, Financial Assets	133	17
Gross Financial Liabilities		69
Net Financial Liabilities in the Consolidated Statement of Financial Position		69
Net Amount		69
Derivative Financial Liabilities [Member]
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross Financial Liabilities		68
Net Financial Liabilities in the Consolidated Statement of Financial Position		68
Net Amount		68
Bank Indebtedness [Member]
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross Financial Liabilities		1
Net Financial Liabilities in the Consolidated Statement of Financial Position		1
Net Amount		1
Derivative financial assets [member]
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross Financial Assets	100
Net Financial Assets in the Consolidated Statement of Financial Position	100
Net Amount	100
Cash and cash equivalent [member]
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross Financial Assets	33	17
Net Financial Assets in the Consolidated Statement of Financial Position	33	17
Net Amount, Financial Assets	$ 33	$ 17

Other Non-Current Assets - Summ

Other Non-Current Assets - Summary of Other Non-Current Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Noncurrent Assets [abstract]
Net defined benefit plan surpluses	$ 128	$ 85
Cash surrender value of life insurance policies	334	320
Deferred commissions	105	82
Other financial assets	198	98
Other non-current assets	23	26
Total other non-current assets	$ 788	$ 611

Payables, Accruals and Provis_3

Payables, Accruals and Provisions - Schedule of Payables, Accruals and Provisions (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Payables Accruals And Provisions [abstract]
Trade payables	$ 217	$ 265
Current tax liabilities	251	124
Accruals	761	801
Provisions	111	119
Other current liabilities	70	64
Total payables, accruals and provisions	$ 1,410	$ 1,373

Payables, Accruals and Provis_4

Payables, Accruals and Provisions - Schedule of Payables, Accruals and Provisions Parenthetical (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Payables Accruals And Provisions [abstract]
Uncertain Tax Positions	$ 214	$ 204

Provisions and Other Non-Curr_3

Provisions and Other Non-Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other provisions [line items]
Restructuring charges		$ 117
Lease expiration period	expire over the next four years

Provisions and Other Non-Curr_4

Provisions and Other Non-Current Liabilities - Summary of Provisions and Other Non-Current Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other provisions [abstract]
Net defined benefit plan obligations	$ 598	$ 714
Other financial liabilities	224	256
Deferred compensation and employee incentives	111	141
Provisions	140	126
Other non-current liabilities	10	27
Total provisions and other non-current liabilities	$ 1,083	$ 1,264

Provisions and Other Non-Curr_5

Provisions and Other Non-Current Liabilities - Summary of Provisions and Other Non-Current Liabilities (Parenthetical) (Detail) $ in Millions	1 Months Ended
	Jun. 30, 2020USD ($)
Disclosure of other provisions [Line Items]
Reclassification of compensation to contributed surplus	$ 27

Provisions and Other Non-Curr_6

Provisions and Other Non-Current Liabilities - Summary of Movement in Provisions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other provisions [Line Items]
Other provisions at beginning of period	$ 245	$ 331
Charges	94	202
Utilization	(76)	(301)
Translation and other, net	(12)	13
Other provisions at end of period	251	245
Less: short-term provisions	111	119
Long-term provisions	140	126
Employee-related [member]
Disclosure of other provisions [Line Items]
Charges	61	12
Utilization	(15)	(25)
Translation and other, net		13
Other provisions at end of period	46
Less: short-term provisions	46
Restructuring [member]
Disclosure of other provisions [Line Items]
Other provisions at beginning of period	56	94
Charges		117
Utilization	(52)	(145)
Translation and other, net	1	(10)
Other provisions at end of period	5	56
Less: short-term provisions	5	56
Facilities-related [member]
Disclosure of other provisions [Line Items]
Other provisions at beginning of period	27	28
Charges	3	3
Utilization	(2)	(18)
Translation and other, net		14
Other provisions at end of period	28	27
Less: short-term provisions	3	2
Long-term provisions	25	25
Other [member]
Disclosure of other provisions [Line Items]
Other provisions at beginning of period	162	209
Charges	30	70
Utilization	(7)	(113)
Translation and other, net	(13)	(4)
Other provisions at end of period	172	162
Less: short-term provisions	57	61
Long-term provisions	$ 115	$ 101

Deferred Tax - Reconciliation o

Deferred Tax - Reconciliation of Movements of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets and Liabilities [Line Items]
Beginning Balance	$ 1,110
Ending balance	991	$ 1,110
Beginning balance	1,710
Ending Balance	1,801	1,710
Net deferred tax assets	810	600
Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
Beginning Balance	1,110	1,248
Acquisitions	7	79
Impact of IFRS 16 adoption		48
Benefit to other comprehensive income	36	(9)
Ending balance	991	1,110
Disposals of businesses		(14)
Translation and other, net	1	14
Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
Impact of IFRS 16 adoption		45
Benefit to other comprehensive income	(17)	12
Benefit to equity	3	8
Beginning balance	1,710	499
Disposals of businesses		(1)
Translation and other, net	33	15
Ending Balance	1,801	1,710
Continuing Operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	(163)	(250)
Continuing Operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	68	1,145
Discontinued operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement		(6)
Discontinued operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	4	(13)
Goodwill and Other Identifiable Intangible Assets [Member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
Beginning Balance	578	528
Acquisitions	5	63
Benefit to other comprehensive income	0
Ending balance	546	578
Disposals of businesses		(2)
Translation and other, net	(4)
Goodwill and Other Identifiable Intangible Assets [Member] | Continuing Operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	(33)	(11)
Computer Software, Property and Equipment [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
Beginning Balance	38	18
Acquisitions	2	16
Impact of IFRS 16 adoption		38
Benefit to other comprehensive income	0
Ending balance	23	38
Disposals of businesses		(12)
Translation and other, net	2	1
Computer Software, Property and Equipment [member] | Continuing Operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	(19)	(19)
Computer Software, Property and Equipment [member] | Discontinued operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement		(4)
Equity Method Investments [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
Beginning Balance	294	463
Acquisitions	0
Benefit to other comprehensive income	36	(9)
Ending balance	172	294
Translation and other, net	1
Equity Method Investments [member] | Continuing Operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	(159)	(158)
Equity Method Investments [member] | Discontinued operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement		(2)
Other [Member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
Beginning Balance	200	239
Acquisitions	0
Impact of IFRS 16 adoption		10
Benefit to other comprehensive income	0
Ending balance	250	200
Translation and other, net	2	13
Other [Member] | Continuing Operations [member] | Deferred Tax Liabilities [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	48	(62)
Tax losses [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
Benefit to equity	0
Beginning balance	91	73
Translation and other, net	11	18
Ending Balance	131	91
Tax losses [member] | Continuing Operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	29	7
Tax losses [member] | Discontinued operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	0	(7)
Goodwill and Other Identifiable Intangible Assets [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
Benefit to other comprehensive income	0
Benefit to equity	0
Beginning balance	1,168	11
Translation and other, net	1	(1)
Ending Balance	1,110	1,168
Goodwill and Other Identifiable Intangible Assets [member] | Continuing Operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	(59)	1,158
Goodwill and Other Identifiable Intangible Assets [member] | Discontinued operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	0
Employee Benefits and Compensation [member]
Deferred Tax Assets and Liabilities [Line Items]
Benefit to equity	(3)	(8)
Employee Benefits and Compensation [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
Benefit to other comprehensive income	(17)	12
Benefit to equity	3	8
Beginning balance	253	238
Translation and other, net	(1)
Ending Balance	214	253
Employee Benefits and Compensation [member] | Continuing Operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	(24)	(5)
Employee Benefits and Compensation [member] | Discontinued operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	0
Other [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
Impact of IFRS 16 adoption		45
Benefit to other comprehensive income	0
Benefit to equity	0
Beginning balance	198	177
Disposals of businesses		(1)
Translation and other, net	22	(2)
Ending Balance	346	198
Other [member] | Continuing Operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	122	(15)
Other [member] | Discontinued operations [member] | Deferred Tax Assets [member]
Deferred Tax Assets and Liabilities [Line Items]
(Benefit) expense to income statement	$ 4	$ (6)

Deferred Tax - Reconciliation_2

Deferred Tax - Reconciliation of Movements of Deferred Tax Assets and Liabilities (Parenthetical) (Detail) $ in Billions	12 Months Ended
	Dec. 31, 2019USD ($)
Deferred tax assets and liabilities [abstract]
Increase in tax assets owned by foreign subsidiary	$ 1.2

Deferred Tax - Summary of Estim

Deferred Tax - Summary of Estimated Recovery Period For Deferred Tax Balances (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Statement [Line Items]
Deferred tax liability	$ 394	$ 576
Total deferred tax liabilities	991	1,110
Deferred tax assets	1,204	1,176
Total deferred tax assets	1,801	1,710
Net deferred tax assets	810	600
Recovered after more than 12 Months [member]
Statement [Line Items]
Deferred tax liability	866	1,107
Deferred tax assets	1,666	1,616
Recovered within 12 Months [member]
Statement [Line Items]
Deferred tax liability	125	3
Deferred tax assets	$ 135	$ 94

Deferred Tax - Summary of Tax L

Deferred Tax - Summary of Tax Losses and Other Tax Attributes (Detail) $ in Millions	Dec. 31, 2020USD ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax Value	$ 1,397
Unrecognized Deferred Tax Assets	(1,188)
Net Deferred Tax Assets	209
Unused tax losses [member] | Canada [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Carry Forward Loss/Tax Attributes	2,130
Tax Value	562
Unrecognized Deferred Tax Assets	(559)
Net Deferred Tax Assets	3
Unused tax losses [member] | Other Jurisdictions [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Carry Forward Loss/Tax Attributes	1,911
Tax Value	491
Unrecognized Deferred Tax Assets	(430)
Net Deferred Tax Assets	61
Capital Losses [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Carry Forward Loss/Tax Attributes	737
Tax Value	162
Unrecognized Deferred Tax Assets	(99)
Net Deferred Tax Assets	63
Investment in subsidiaries [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Carry Forward Loss/Tax Attributes	300
Tax Value	75
Unrecognized Deferred Tax Assets	(75)
Other deductible temporary differences [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Carry Forward Loss/Tax Attributes	30
Tax Value	8
Unrecognized Deferred Tax Assets	(8)
U.S. state net operating losses [member] | U.S. [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax Value	12
Unrecognized Deferred Tax Assets	(10)
Net Deferred Tax Assets	2
Other attributes and credits [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Tax Value	87
Unrecognized Deferred Tax Assets	(7)
Net Deferred Tax Assets	$ 80

Deferred Tax - Summary of Tax_2

Deferred Tax - Summary of Tax Losses and Other Tax Attributes (Parenthetical) (Detail) $ in Millions	Dec. 31, 2020USD ($)
Deferred tax assets and liabilities [abstract]
Deferred tax assets tax losses	$ 131
Other deferred tax assets	$ 78

Deferred Tax - Additional Infor

Deferred Tax - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Undistributed earnings of non-Canadian subsidiaries	$ 12,100	$ 10,900
Deferred tax asset	1,204	1,176
Deferred tax benefit	(231)	(1,395)
Assets owned by foreign subsidiary [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax asset		1,200
Deferred tax benefit	$ (138)	$ (1,200)

Capital - Summary of Change in

Capital - Summary of Change in Capital (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Balance	$ 9,560	$ 9,210
Shares issued under DRIP	23	23
Stock compensation plans	74	74
Balance	9,980	9,560
Stated capital [member]
Disclosure of classes of share capital [line items]
Balance	3,466	3,333
Shares issued under DRIP	23	23
Stock compensation plans	136	178
Balance	3,609	3,466
Contributed surplus [member]
Disclosure of classes of share capital [line items]
Balance	1,801	1,905
Stock compensation plans	(62)	(104)
Balance	1,739	1,801
Total capital [member]
Disclosure of classes of share capital [line items]
Balance	5,377	5,348
Shares issued under DRIP	23	23
Stock compensation plans	74	74
Balance	5,458	5,377
Repurchases of common shares [member] | Stated capital [member]
Disclosure of classes of share capital [line items]
Increase (decrease) through treasury share transactions	(16)	(68)
Repurchases of common shares [member] | Total capital [member]
Disclosure of classes of share capital [line items]
Increase (decrease) through treasury share transactions	$ (16)	$ (68)
Number of common shares [member]
Disclosure of classes of share capital [line items]
Beginning balance, number of shares	497,459,546	501,493,187
Shares issued under DRIP, number of shares	313,879	361,470
Stock compensation plans, number of shares	1,896,489	3,074,176
Beginning balance, number of shares	497,117,528	497,459,546
Number of common shares [member] | Repurchases of common shares [member]
Disclosure of classes of share capital [line items]
Increase (decrease) through treasury share transactions, number of shares	(2,552,386)	(7,469,287)
Series ii cumulative redeemable preference share capital [member]
Disclosure of classes of share capital [line items]
Balance	$ 110	$ 110
Balance	$ 110	$ 110

Capital - Summary of Change i_2

Capital - Summary of Change in Capital (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Pre-defined share repurchase plan	$ (200)	$ (200)
Reclassification of compensation to contributed surplus	74	74
Stated Capital [Member]
Disclosure of classes of share capital [line items]
Pre-defined share repurchase plan	(18)	(20)
Share premium [member]
Disclosure of classes of share capital [line items]
Reclassification of compensation to contributed surplus	(62)	$ (104)
Share premium [member] | Stated Capital [Member]
Disclosure of classes of share capital [line items]
Reclassification of compensation to contributed surplus	$ 27

Capital - Summary of Dividend D

Capital - Summary of Dividend Declared and Paid (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Dividends Declared And Paid [Abstract]
Dividends declared per common share	$ 1.52	$ 1.44
Dividends declared	$ 753	$ 721
Dividends reinvested	(23)	(23)
Dividends paid	$ 730	$ 698

Capital - Details of Share Repu

Capital - Details of Share Repurchases (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of share repurchases [abstract]
Share repurchases	$ 200	$ 488
Shares repurchased	2.6	7.8
Share repurchases - average price per share in U.S. dollars	$ 78.37	$ 62.33

Capital - Additional Informatio

Capital - Additional Information (Detail) $ in Millions	1 Months Ended		12 Months Ended
	Feb. 28, 2021USD ($)	Feb. 29, 2020USD ($)	Dec. 31, 2020USD ($)shares	Dec. 31, 2020$ / shares	Dec. 31, 2019USD ($)shares
Disclosure Of Share Capital [Line Items]
Other financial liabilities			$ 376		$ 434
Major Ordinary Share Transactions [Member]
Disclosure Of Share Capital [Line Items]
Repurchase of common share		$ 200
Series ii cumulative redeemable preference share capital [member]
Disclosure Of Share Capital [Line Items]
Number of shares authorized | shares			6,000,000		6,000,000
Redemption price of shares | $ / shares				$ 25
Dividend payable rate percentage			70.00%
Pre-defined share repurchase program with broker [member]
Disclosure Of Share Capital [Line Items]
Other financial liabilities			$ 200		$ 200
NCIB [member]
Disclosure Of Share Capital [Line Items]
Potential repurchase of common shares | shares			5,000,000
NCIB [member] | Major Ordinary Share Transactions [Member] | Forecast [member]
Disclosure Of Share Capital [Line Items]
Repurchase of common share	$ 200

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Weighted average share price at the time of exercise of awards | $ / shares	$ 69.98	$ 59.61
Withholding tax liabilities	$ 115,000,000	$ 127,000,000
Stock incentive plan [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Number of common shares available for grant	11,106,551	12,703,952
Maximum number of common shares available for grant	69,150,969
Stock Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Maximum term of option	10 years
TSRUs [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Weighted average fair value of options granted	$ 75.68	$ 59.97
PRSUs [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Weighted average fair value of options granted	$ 75.95	$ 54.78
Vesting period	3 years
PRSUs [Member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Percentage of options vested	0.00%
PRSUs [Member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Percentage of options vested	200.00%
Employee Stock Purchase Plan [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Percentage of discount allowed for purchase of shares	15.00%
Maximum payroll deduction allowed	$ 21,250
Maximum shares to be purchased through plan | shares	20,388,909

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Incentive Plans (Detail)	12 Months Ended
	Dec. 31, 2020
Stock Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Vesting period	Up to four years
Fair Value Measure	Black-Scholes option pricing model
TSRUs [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Vesting period	Up to five years
Fair Value Measure	Closing common share price
PRSUs [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Vesting period	Three-year performance period
Fair Value Measure	Closing common share price
Equity-settled [member] | Stock Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	Fair value on business day prior to grant date
Equity-settled [member] | TSRUs [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	Fair value on business day prior to grant date
Equity-settled [member] | PRSUs [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Compensation expense	Fair value on business day prior to grant date

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value Measurement of Stock Options (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Weighted average fair value [abstract]
Weighted-average fair value	$ 6.73	$ 5.65
Share price	$ 75.96	$ 54.48
Exercise price	$ 75.96	$ 54.48
Risk-free interest rate	0.90%	2.60%
Dividend yield	3.10%	3.30%
Volatility factor	16.00%	15.00%
Expected life (in years)	5	5

Share-Based Compensation - Numb

Share-Based Compensation - Number of Awards Outstanding (Detail)	12 Months Ended
	Dec. 31, 2020$ / shares	Dec. 31, 2019$ / shares
Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [line items]
Ending balance	3,461,000
Exercisable	577,000
Beginning balance	8,450,000	12,472,000
Granted	2,084,000	2,182,000
Exercised	(3,698,000)	(5,541,000)
Forfeited	(505,000)	(663,000)
Ending balance	6,331,000	8,450,000
Exercisable	577,000	1,449,000
Beginning balance	$ 42.36	$ 39.11
Granted	75.96	54.48
Exercised	40.05	38.21
Ending balance	54.06	42.36
Exercisable	$ 44.35	$ 39.77
TSRUs [Member]
Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [line items]
Beginning balance	2,495,000	2,419,000
Granted	573,000	818,000
Exercised	(660,000)	(483,000)
Forfeited	(283,000)	(259,000)
Ending balance	2,125,000	2,495,000
Exercisable	0
PRSUs [Member]
Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [line items]
Beginning balance	881,000	1,594,000
Granted	398,000	456,000
Exercised	(463,000)	(1,087,000)
Forfeited	(71,000)	(82,000)
Ending balance	745,000	881,000
Exercisable	0
Stock Options [Member]
Disclosure Of Number And Weighted Average Exercise Price Of Outstanding Awards [line items]
Beginning balance	5,074,000	8,459,000
Granted	1,113,000	908,000
Exercised	(2,575,000)	(3,971,000)
Forfeited	(151,000)	(322,000)
Ending balance	3,461,000	5,074,000
Exercisable	577,000	1,449,000

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Share Based Compensation Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Share Based Compensation Expense [line items]
Share-based compensation expense	$ 64	$ 56
Stock Options [Member]
Disclosure Of Share Based Compensation Expense [line items]
Share-based compensation expense	7	5
TSRUs [Member]
Disclosure Of Share Based Compensation Expense [line items]
Share-based compensation expense	40	35
PRSUs [Member]
Disclosure Of Share Based Compensation Expense [line items]
Share-based compensation expense	13	12
Employee Stock Purchase Plan [member]
Disclosure Of Share Based Compensation Expense [line items]
Share-based compensation expense	$ 4	$ 4

Share-Based Compensation - Su_2

Share-Based Compensation - Summary of Additional Information Relating to Stock Options and SAR's (Detail) Unit_pure in Thousands	12 Months Ended
	Dec. 31, 2020$ / shares	Dec. 31, 2019$ / shares	Dec. 31, 2018$ / shares
Disclosure of range of exercise prices of outstanding share options [Line Items]
Number Outstanding	3,461
Weighted-Average Exercise Price - Outstanding Awards	$ 54.06	$ 42.36	$ 39.11
Number Exercisable	577
Weighted-Average Exercise Price - Exercisable Awards	$ 44.35	$ 39.77
35.01 - 40.00 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Number Outstanding	1,090
Weighted-Average Remaining Life	7 years 2 months 23 days
Weighted-Average Exercise Price - Outstanding Awards	$ 39.23
Number Exercisable	276
Weighted-Average Exercise Price - Exercisable Awards	$ 38.47
40.01 - 45.00 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Number Outstanding	574
Weighted-Average Remaining Life	6 years 2 months 1 day
Weighted-Average Exercise Price - Outstanding Awards	$ 42.30
Number Exercisable	117
Weighted-Average Exercise Price - Exercisable Awards	$ 42.30
50.01 - 55.00 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Number Outstanding	753
Weighted-Average Remaining Life	8 years 2 months 4 days
Weighted-Average Exercise Price - Outstanding Awards	$ 54.36
Number Exercisable	181
Weighted-Average Exercise Price - Exercisable Awards	$ 54.36
60.01 - 65.00 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Number Outstanding	12
Weighted-Average Remaining Life	8 years 4 months 9 days
Weighted-Average Exercise Price - Outstanding Awards	$ 63.26
Number Exercisable	3
Weighted-Average Exercise Price - Exercisable Awards	$ 63.26
75.01 - 80.00
Disclosure of range of exercise prices of outstanding share options [Line Items]
Number Outstanding	1,032
Weighted-Average Remaining Life	9 years 2 months 4 days
Weighted-Average Exercise Price - Outstanding Awards	$ 75.96

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2024
Disclosure of defined benefit plans [Line Items]
Curtailment gains		$ 8
Post-employment benefit expense, defined contribution plans	$ 78	$ 75
Average Plan [Member]
Disclosure of defined benefit plans [Line Items]
Retirement age used to for life expectancy	65 years	65 years
Participant Plan [Member]
Disclosure of defined benefit plans [Line Items]
Current age of participants to determine life expectancy at retirement	40 years	40 years
Retiring Plan [Member]
Disclosure of defined benefit plans [Line Items]
Years to retirement difference between current age of participants and retirement age	25 years	25 years
Other operating gains, net [member]
Disclosure of defined benefit plans [Line Items]
Curtailment gains	$ 119
Enhanced benefits, recognized		$ 8
Medical Cost Trend [Member]
Disclosure of defined benefit plans [Line Items]
Percentage of reasonably possible change in actuarial assumption	1.00%
Change in defined benefit obligation due to reasonably possible change in actuarial assumption	$ 6
Medical cost trend rate	7.50%		4.80%
TRGP and TTC Plans [member]
Disclosure of defined benefit plans [Line Items]
Change in defined benefit obligation due to reasonably possible change in actuarial assumption	$ 100
Increase in life expectancy	1 year
TRGP and TTC Plans [member] | Discount Rate [Member]
Disclosure of defined benefit plans [Line Items]
Percentage of reasonably possible change in actuarial assumption	0.25%
Change in defined benefit obligation due to reasonably possible change in actuarial assumption	$ 160
TRGP and TTC Plans [member] | Rates of Inflation [Member]
Disclosure of defined benefit plans [Line Items]
Percentage of reasonably possible change in actuarial assumption	0.25%
Change in defined benefit obligation due to reasonably possible change in actuarial assumption	$ 25
TRGP and TTC Plans [member] | Rate of Increase in Salaries [Member]
Disclosure of defined benefit plans [Line Items]
Percentage of reasonably possible change in actuarial assumption	0.25%
Material defined benefit plans [Member]
Disclosure of defined benefit plans [Line Items]
Employer contribution to defined benefit plans	$ 33	203
Expected employer contribution to be made in 2020	39
Funded Plans [member]
Disclosure of defined benefit plans [Line Items]
Curtailment gains		8
Expected employer contribution to be made in 2020	$ 6
Medical cost trend rate	0.00%
OPEB [Member]
Disclosure of defined benefit plans [Line Items]
Expected employer contribution to be made in 2020	$ 33
U.K. [Member] | Material defined benefit plans [Member]
Disclosure of defined benefit plans [Line Items]
Employer contribution to defined benefit plans		$ 167
Bottom of range [member]
Disclosure of defined benefit plans [Line Items]
Normal Retirement Age	60 years
Top of range [member]
Disclosure of defined benefit plans [Line Items]
Normal Retirement Age	65 years

Employee Benefits Plan - Net De

Employee Benefits Plan - Net Defined Benefit Plan Obligations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	$ (629)	$ (701)
Plan expense recognized in income statement:
Plan income (expense) recognized in income statement	40	(80)
Actuarial gains (losses)	78	(53)
Exchange differences	7	1
Contributions paid	34	203
Disposals of businesses		1
End of period	(470)	(629)
Net plan surpluses recognized in non-current assets	128	85
Net plan obligations recognized in non-current liabilities	(598)	(714)
Defined Benefit Plan [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(510)	(589)
Plan expense recognized in income statement:
Plan income (expense) recognized in income statement	43	(67)
Actuarial gains (losses)	60	(49)
Exchange differences	5	1
Contributions paid	28	195
Other	2	(1)
End of period	(372)	(510)
Other Post Employment Benefits [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(119)	(112)
Plan expense recognized in income statement:
Plan income (expense) recognized in income statement	(3)	(13)
Actuarial gains (losses)	18	(4)
Exchange differences	2
Contributions paid	6	8
Disposals of businesses		1
Other	(2)	1
End of period	$ (98)	$ (119)

Employee Benefits Plan - Summar

Employee Benefits Plan - Summary of Net Surpluses (Obligations) of Material Defined Benefit Plans (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefit plans [Line Items]
Fair value of plan assets	$ 3,867	$ 3,428
Net plan obligations	(470)	(629)	$ (701)
Net plan surpluses	128	85
Net plan obligations	(598)	(714)
Other Post Employment Benefits [Member]
Disclosure of defined benefit plans [Line Items]
Net plan obligations	(98)	(119)	$ (112)
Material Defined Benefit Plans [Member]
Disclosure of defined benefit plans [Line Items]
Present value of plan obligations	(4,307)	(4,029)
Fair value of plan assets	3,867	3,428
Net plan obligations	(440)	(601)
Net plan surpluses	125	83
Net plan obligations	(565)	(684)
Material Defined Benefit Plans [Member] | Funded Plans [Member]
Disclosure of defined benefit plans [Line Items]
Present value of plan obligations	(3,915)	(3,628)
Fair value of plan assets	3,867	3,428
Net plan obligations	(48)	(200)
Net plan surpluses	125	83
Net plan obligations	(173)	(283)
Material Defined Benefit Plans [Member] | Unfunded Plans [Member]
Disclosure of defined benefit plans [Line Items]
Present value of plan obligations	(317)	(299)
Net plan obligations	(317)	(299)
Net plan obligations	(317)	(299)
Material Defined Benefit Plans [Member] | Other Post Employment Benefits [Member]
Disclosure of defined benefit plans [Line Items]
Present value of plan obligations	(75)	(102)
Net plan obligations	(75)	(102)
Net plan obligations	$ (75)	$ (102)

Employee Benefits Plan - Summ_2

Employee Benefits Plan - Summary of Activity in Defined Benefit Obligation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	$ (629)	$ (701)
Current service cost	(45)	(42)
Interest cost	21	25
Administration fees disbursements	8	12
Exchange differences	7	1
End of period	(470)	(629)
Present Value of Defined Benefit Obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(4,029)	(3,547)
Current service cost	(45)	(42)
Administration fees	(8)	(12)
Interest cost	(115)	(135)
Actuarial losses from changes in financial assumptions	(436)	(532)
Actuarial gains from changes in demographic assumptions	26	57
Experience (losses) gains	5	3
Contributions by employees	(3)	(3)
Benefits paid	218	204
Administration fees disbursements	7	11
Curtailment gain		8
Plan amendments	115
Exchange differences	(45)	(43)
Other	3	2
End of period	(4,307)	(4,029)
Funded Plans [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Current service cost	(44)	(39)
Interest cost	9	9
Administration fees disbursements	7	11
Funded Plans [Member] | Present Value of Defined Benefit Obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(3,628)	(3,164)
Current service cost	(44)	(39)
Administration fees	(7)	(11)
Interest cost	(103)	(119)
Actuarial losses from changes in financial assumptions	(406)	(497)
Actuarial gains from changes in demographic assumptions	23	52
Experience (losses) gains	(20)	1
Contributions by employees	(1)	(1)
Benefits paid	190	172
Administration fees disbursements	7	11
Curtailment gain		8
Plan amendments	119
Exchange differences	(43)	(42)
Other	(2)	1
End of period	(3,915)	(3,628)
Unfunded Plans [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Current service cost	(1)	(2)
Interest cost	9	12
Administration fees disbursements	1	1
Unfunded Plans [Member] | Present Value of Defined Benefit Obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(299)	(279)
Current service cost	(1)	(2)
Administration fees	(1)	(1)
Interest cost	(9)	(12)
Actuarial losses from changes in financial assumptions	(20)	(27)
Actuarial gains from changes in demographic assumptions	2	4
Experience (losses) gains	(3)	(4)
Benefits paid	20	22
Plan amendments	(4)
Exchange differences	(2)	(1)
Other		1
End of period	(317)	(299)
Other Post Employment Benefits [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(119)	(112)
Current service cost		(1)
Interest cost	3	4
Exchange differences	2
Other	(2)	1
End of period	(98)	(119)
Other Post Employment Benefits [Member] | Present Value of Defined Benefit Obligation [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning of period	(102)	(104)
Current service cost		(1)
Interest cost	(3)	(4)
Actuarial losses from changes in financial assumptions	(10)	(8)
Actuarial gains from changes in demographic assumptions	1	1
Experience (losses) gains	28	6
Contributions by employees	(2)	(2)
Benefits paid	8	10
Other	5
End of period	$ (75)	$ (102)

Employee Benefits Plan - Define

Employee Benefits Plan - Defined Benefit Obligation - Other Disclosures (Detail) - Present Value of Defined Benefit Obligation [Member] - Percentage of Participants in Defined Benefits Plans [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of net defined benefit liability (asset) [Line Items]
Percentage attributable to active employees	27.00%	30.00%
Percentage attributable to deferred (former employees)	35.00%	33.00%
Percentage attributable to retirees	38.00%	37.00%
Total participation	100.00%	100.00%
U.S. [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Employee participation percentage	69.00%	70.00%
U.K. [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Employee participation percentage	27.00%	26.00%
Rest of World [Member]
Disclosure of net defined benefit liability (asset) [Line Items]
Employee participation percentage	4.00%	4.00%

Employee Benefits Plan - Summ_3

Employee Benefits Plan - Summary of Defined Benefit Obligation Analyzed by Participant Group and Geography (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Thomson Reuters Group Pension Plan [Member]
Disclosure of net defined benefit liability (asset) [line items]
Weighted average duration of defined benefit obligation	17 years	17 years
The Thomson Corporation PLC Pension Scheme [Member]
Disclosure of net defined benefit liability (asset) [line items]
Weighted average duration of defined benefit obligation	18 years	18 years

Employee Benefits Plan - Fair V

Employee Benefits Plan - Fair Value of Plan Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value of plan assets [Line Items]
Beginning of period	$ 629	$ 701
Interest income	(21)	(25)
Administration fees disbursements	(8)	(12)
Exchange differences	(7)	(1)
End of period	470	629
Fair Value of Plan Assets [Member]
Disclosure of fair value of plan assets [Line Items]
Beginning of period	3,428	2,857
Interest income	94	110
Return on plan assets excluding amounts included in interest income	482	424
Contributions by employer	33	203
Contributions by employees	3	3
Benefits paid	(218)	(204)
Administration fees disbursements	(7)	(11)
Exchange differences	51	43
Other	1	3
End of period	3,867	3,428
Funded Plans [member]
Disclosure of fair value of plan assets [Line Items]
Interest income	(9)	(9)
Administration fees disbursements	(7)	(11)
Funded Plans [member] | Fair Value of Plan Assets [Member]
Disclosure of fair value of plan assets [Line Items]
Beginning of period	3,428	2,857
Interest income	94	110
Return on plan assets excluding amounts included in interest income	482	424
Contributions by employer	7	173
Contributions by employees	1	1
Benefits paid	(190)	(172)
Administration fees disbursements	(7)	(11)
Exchange differences	51	43
Other	1	3
End of period	3,867	3,428
Unfunded Plans [Member]
Disclosure of fair value of plan assets [Line Items]
Interest income	(9)	(12)
Administration fees disbursements	(1)	(1)
Unfunded Plans [Member] | Fair Value of Plan Assets [Member]
Disclosure of fair value of plan assets [Line Items]
Contributions by employer	20	22
Benefits paid	(20)	(22)
Other Post Employment Benefits [Member]
Disclosure of fair value of plan assets [Line Items]
Beginning of period	119	112
Interest income	(3)	(4)
Exchange differences	(2)
Other	2	(1)
End of period	98	119
Other Post Employment Benefits [Member] | Fair Value of Plan Assets [Member]
Disclosure of fair value of plan assets [Line Items]
Contributions by employer	6	8
Contributions by employees	2	2
Benefits paid	$ (8)	$ (10)

Employee Benefits Plan - Summ_4

Employee Benefits Plan - Summary of Major Categories of Plan Assets for Funded Plans (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value of plan assets [Line Items]
Equities	$ 860	$ 771
Bonds	2,036	1,852
Property	4	2
Insurance	36	38
Derivatives	679	266
Cash and cash equivalents	109	352
Other	8	7
Total	3,867	3,428
U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Equities	222	194
U.K. [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	3	6
All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	635	571
Corporate Bonds [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Bonds	1,017	899
Corporate Bonds [Member] | U.K. [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds		149
Corporate Bonds [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	112	56
Government Bonds [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Bonds	634	554
Government Bonds [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	17	14
Other Fixed Income [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	256	180
Multi-Asset [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset	135	140
Multi-Asset [Member] | U.K. [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset		7
Multi-Asset [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset	135	133
Quoted Plan Assets [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	269	242
Bonds	309	276
Property	4	2
Cash and cash equivalents	12	11
Other	1	1
Total	596	539
Quoted Plan Assets [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Equities	157	144
Quoted Plan Assets [Member] | U.K. [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	3	6
Quoted Plan Assets [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	109	92
Quoted Plan Assets [Member] | Corporate Bonds [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Bonds	226	201
Quoted Plan Assets [Member] | Corporate Bonds [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	3	2
Quoted Plan Assets [Member] | Government Bonds [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Bonds	3	2
Quoted Plan Assets [Member] | Government Bonds [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	4	3
Quoted Plan Assets [Member] | Other Fixed Income [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	73	68
Quoted Plan Assets [Member] | Multi-Asset [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset	1	7
Quoted Plan Assets [Member] | Multi-Asset [Member] | U.K. [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset		7
Quoted Plan Assets [Member] | Multi-Asset [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset	1
Unquoted Plan Assets [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	591	529
Bonds	1,727	1,576
Property	0
Insurance	36	38
Derivatives	679	266
Cash and cash equivalents	97	341
Other	7	6
Total	3,271	2,889
Unquoted Plan Assets [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Equities	65	50
Unquoted Plan Assets [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Equities	526	479
Unquoted Plan Assets [Member] | Corporate Bonds [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Bonds	791	698
Unquoted Plan Assets [Member] | Corporate Bonds [Member] | U.K. [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds		149
Unquoted Plan Assets [Member] | Corporate Bonds [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	109	54
Unquoted Plan Assets [Member] | Government Bonds [Member] | U.S. [member]
Disclosure of fair value of plan assets [Line Items]
Bonds	631	552
Unquoted Plan Assets [Member] | Government Bonds [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	13	11
Unquoted Plan Assets [Member] | Other Fixed Income [Member]
Disclosure of fair value of plan assets [Line Items]
Bonds	183	112
Unquoted Plan Assets [Member] | Multi-Asset [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset	134	133
Unquoted Plan Assets [Member] | Multi-Asset [Member] | All Other Countries [Member]
Disclosure of fair value of plan assets [Line Items]
Multi-asset	$ 134	$ 133

Employee Benefits Plan - Summ_5

Employee Benefits Plan - Summary of Weighted-Average Actuarial Assumptions (Detail)	Dec. 31, 2020	Dec. 31, 2019
Funded Plans [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate	2.22%	2.94%
Inflation assumption	2.78%	3.19%
Rate of increase in salaries	3.48%	3.44%
Rate of increase in pension payments	2.79%	3.03%
Medical cost trend	0.00%
Unfunded Plans [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate	2.59%	3.31%
Inflation assumption	2.71%	2.37%
Rate of increase in salaries	1.75%	3.50%
Rate of increase in pension payments	2.75%	3.05%
Medical cost trend	0.00%
Other Post Employment Benefits [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate	2.05%	3.03%
Inflation assumption	0.00%
Rate of increase in salaries	3.50%	3.40%
Rate of increase in pension payments	0.00%
Medical cost trend	7.50%	6.25%

Employe Benfits Plan - Summary

Employe Benfits Plan - Summary of Life Expectation in Years of an Average Plan Participant (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of sensitivity analysis for actuarial assumptions [abstract]
Male employee retiring at age 65	21 years	22 years
Male employee age 40 retiring at age 65	23 years	24 years
Female employee retiring at age 65	23 years	23 years
Female employee age 40 retiring at age 65	24 years	25 years

Employee Benefits Plan - Summ_6

Employee Benefits Plan - Summary of Defined Benefit Plan Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of defined benefit plan expense [line items]
Current service cost	$ 45	$ 42
Net interest cost	21	25
Administration fees	8	12
Curtailment gain		(8)
Plan amendments	(115)
Defined benefit plan (income) expense	(41)	71
Funded Plans [member]
Disclosure of defined benefit plan expense [line items]
Current service cost	44	39
Net interest cost	9	9
Administration fees	7	11
Curtailment gain		(8)
Plan amendments	(119)
Defined benefit plan (income) expense	(59)	51
UnFunded Plans [member]
Disclosure of defined benefit plan expense [line items]
Current service cost	1	2
Net interest cost	9	12
Administration fees	1	1
Plan amendments	4
Defined benefit plan (income) expense	15	15
Other Post Employment Benefits [Member]
Disclosure of defined benefit plan expense [line items]
Current service cost		1
Net interest cost	3	4
Defined benefit plan (income) expense	$ 3	$ 5

Employee Benefits Plan - Summ_7

Employee Benefits Plan - Summary of Amounts Recognized in Other Comprehensive Loss (Income) for Material Defined Benefit Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Remeasurement losses (gains) on defined benefit obligation:
Total recognized in other comprehensive (income) loss before taxation	$ 78	$ (53)
Other Post Employment Benefits [Member]
Remeasurement losses (gains) on defined benefit obligation:
Total recognized in other comprehensive (income) loss before taxation	18	(4)
Material defined benefit plans [Member]
Remeasurement losses (gains) on defined benefit obligation:
Due to financial assumption changes	436	532
Due to demographic assumption changes	(26)	(57)
Due to experience	(5)	(3)
Return on plan assets greater than discount rate	(482)	(424)
Total recognized in other comprehensive (income) loss before taxation	(77)	48
Balance of accumulated comprehensive loss (income) at January 1	1,386	1,338
Net actuarial (gains) losses recognized in the year	(77)	48
Total accumulated comprehensive loss (income) at December 31,	1,309	1,386
Material defined benefit plans [Member] | Funded Plans [Member]
Remeasurement losses (gains) on defined benefit obligation:
Due to financial assumption changes	406	497
Due to demographic assumption changes	(23)	(52)
Due to experience	20	(1)
Return on plan assets greater than discount rate	(482)	(424)
Total recognized in other comprehensive (income) loss before taxation	(79)	20
Balance of accumulated comprehensive loss (income) at January 1	1,391	1,371
Net actuarial (gains) losses recognized in the year	(79)	20
Total accumulated comprehensive loss (income) at December 31,	1,312	1,391
Material defined benefit plans [Member] | Unfunded Plans [Member]
Remeasurement losses (gains) on defined benefit obligation:
Due to financial assumption changes	20	27
Due to demographic assumption changes	(2)	(4)
Due to experience	3	4
Total recognized in other comprehensive (income) loss before taxation	21	27
Balance of accumulated comprehensive loss (income) at January 1	82	55
Net actuarial (gains) losses recognized in the year	21	27
Total accumulated comprehensive loss (income) at December 31,	103	82
Material defined benefit plans [Member] | Other Post Employment Benefits [Member]
Remeasurement losses (gains) on defined benefit obligation:
Due to financial assumption changes	10	8
Due to demographic assumption changes	(1)	(1)
Due to experience	(28)	(6)
Total recognized in other comprehensive (income) loss before taxation	(19)	1
Balance of accumulated comprehensive loss (income) at January 1	(87)	(88)
Net actuarial (gains) losses recognized in the year	(19)	1
Total accumulated comprehensive loss (income) at December 31,	$ (106)	$ (87)

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Presentation of leases for lessee [abstract]
Cash outflows for leases	$ 96	$ 88
Lease Future Cash Outflow which has not yet commenced	134	190
Expenses related to short-term leases	$ 6	$ 27
Operating lease income	$ 20	$ 10

Leases - Summary of Carrying Am

Leases - Summary of Carrying Amount and Related Depreciation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	$ 222	$ 254
Depreciation	90	54
Computer Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	49	40
Depreciation	22	1
Land, Buildings and Building Improvements [member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	171	213
Depreciation	67	52
Furniture, Fixtrues and Other Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	2	1
Depreciation	$ 1	$ 1

Leases - Summary of Future Aggr

Leases - Summary of Future Aggregate Undiscounted Non-cancellable Lease Payments (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Statement [Line Items]
Lease liabilities	$ 329	$ 354
Lease liabilities included in the consolidated statement of financial position
Current	83	69
Non-current	223	253
Within 1 year [Member]
Statement [Line Items]
Lease liabilities	92	80
Between 1 and 2 years [Member]
Statement [Line Items]
Lease liabilities	76	75
Between 2 and 3 years [Member]
Statement [Line Items]
Lease liabilities	49	60
Between 3 and 4 years [Member]
Statement [Line Items]
Lease liabilities	39	41
Between 4 and 5 years [Member]
Statement [Line Items]
Lease liabilities	29	34
Later than 5 years [Member]
Statement [Line Items]
Lease liabilities	$ 44	$ 64

Leases - Summary of Future Ag_2

Leases - Summary of Future Aggregate Undiscounted Lease Payments to be Received (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	$ 36	$ 44
Unearned finance income	(3)	(4)
Net investment in leases	33	40
Within 1 year [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	8	9
Between 1 and 2 years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	7	8
Between 2 and 3 years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	7	7
Between 3 and 4 years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	7	6
Between 4 and 5 years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	5	7
Later than 5 years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Total undiscounted lease payments to be received	$ 2	$ 7

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Details of Other in the Consolidated Statement of Cash Flow (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Other In Consolidated Statement Of Cash Flow [abstract]
Non-cash employee benefit charges	$ 160	$ 157
Net losses (gains) on foreign exchange and derivative financial instruments	(28)	47
Share of post-tax losses in equity method investments	544	599
Revaluation of Refinitiv warrants (see note [6])	(82)	(419)
Fair value adjustments	(10)	0
Other	(163)	1
Total	$ 421	$ 385

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Changes In Working Capital And Other Items [abstract]
Trade and other receivables	$ 29	$ 116
Prepaid expenses and other current assets	8	25
Other financial assets	2	(17)
Payables, accruals and provisions	(133)	(220)
Deferred revenue	19	(10)
Other financial liabilities	(2)	17
Income taxes	250	(71)
Other	(71)	(87)
Total	$ 102	$ (247)

Supplemental Cash Flow Inform_5

Supplemental Cash Flow Information - Details of Income Taxes Paid (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Income Taxes [Line Items]
Investing activities – continuing operations	$ (114)	$ (1)
Operating activities	(52)	(268)
Total income taxes paid	(164)	(314)
Discontinued operations [member]
Disclosure Of Income Taxes [Line Items]
Operating activities	$ 2	$ (45)

Supplemental Cash Flow Inform_6

Supplemental Cash Flow Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement [Line Items]
Gain on amendment to company's pension plan		$ 8
Pension defined benefit plans [member]
Statement [Line Items]
Gain on amendment to company's pension plan	$ 119

Acquisitions - Summary of Acqui

Acquisitions - Summary of Acquisition Activity (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Disclosure of detailed information about business combination [abstract]
Businesses acquired	2	4
Businesses acquired, net of cash	2	4
Asset acquisitions		1
Total number of transactions	2	5
Businesses acquired	$ 166	$ 1,049
Less: Cash acquired	(4)	(59)
Businesses acquired, net of cash	162	990
Investments in businesses	1	4
Contingent consideration payments	4
Asset Acquisition		4
Total	$ 167	$ 998

Acquisitions - Summary of Net A

Acquisitions - Summary of Net Assets Acquired (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about business combination [Line Items]
Cash and cash equivalents	$ 4	$ 59
Business combinations [member]
Disclosure of detailed information about business combination [Line Items]
Cash and cash equivalents	4	59
Trade receivables	4	13
Prepaid expenses and other current assets	1	7
Current assets	9	79
Property and equipment		7
Total assets	57	473
Payables and accruals	(7)	(29)
Deferred revenue	(6)	(25)
Other financial liabilities	(2)	(1)
Current liabilities	(15)	(55)
Provisions and other non-current liabilities	(2)	(5)
Deferred tax	(7)	(79)
Total liabilities	(24)	(139)
Net assets acquired	33	334
Goodwill	133	715
Total	166	1,049
Business combinations [member] | Computer software [member]
Disclosure of detailed information about business combination [Line Items]
Identifiable intangible assets	25	78
Business combinations [member] | Other identifiable intangible assets [member]
Disclosure of detailed information about business combination [Line Items]
Identifiable intangible assets	$ 23	$ 309

Contingencies, Commitments an_3

Contingencies, Commitments and Guarantees - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of analysis of single amount of discontinued operations [line items]
DPT demand paid	$ 164	$ 314
Diverted Property Tax Payable	251	124
Tax Year 2015
Disclosure of analysis of single amount of discontinued operations [line items]
DPT demand paid		$ 31
Tax Year 2016
Disclosure of analysis of single amount of discontinued operations [line items]
Diverted Property Tax Payable	90
Tax Year 2018 | Discontinued operations [member] | Bottom of range [member]
Disclosure of analysis of single amount of discontinued operations [line items]
Potential diverted property tax payable	600
Tax Year 2018 | Discontinued operations [member] | Top of range [member]
Disclosure of analysis of single amount of discontinued operations [line items]
Potential diverted property tax payable	$ 700

Contingencies, Commitments an_4

Contingencies, Commitments and Guarantees - Summary of Future Unconditional Purchase Obligations (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	$ 919	$ 922
Not later than one year [member]
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	316	300
Later than one year and not later than two years [member]
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	277	219
Later than two years and not later than three years [member]
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	242	180
Later than three years and not later than four years [member]
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	71	160
Later than four years and not later than five years [member]
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	13	62
Later than five years [member]
Disclosure of Future Unconditional Purchase Obligations [line items]
Future unconditional purchase obligations	$ 0	$ 1

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	Oct. 01, 2018	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [Line Items]
Other operating gains, net		$ 736	$ 423
Refinitiv [member]
Disclosure of transactions between related parties [Line Items]
Percentage of ownership stake sold	55.00%
Ownership interest retained percentage	45.00%	45.00%	45.00%
Revenue		$ 336	$ 336
Lease receivable amount		112	135
Lease payment amount		$ 100	102
Bottom of range [member]
Disclosure of transactions between related parties [Line Items]
Ownership interest retained percentage		20.00%
Woodbridge [member]
Disclosure of transactions between related parties [Line Items]
Beneficial ownership of shares		66.00%
Refinitiv [member]
Disclosure of transactions between related parties [Line Items]
Other operating gains, net		$ 24	23
Future aggregate minimum lease payments		59	79
Future minimum lease payments receivable under noncancellable operating lease		15	56
Refinitiv [member] | news and editorial [member] | Reuters News [member] | Bottom of range [member]
Disclosure of transactions between related parties [Line Items]
Revenue		$ 336	$ 336

Related Party Transactions - Su

Related Party Transactions - Summary of Expense or Contra-Expense (Detail) - Refinitiv [member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Transitional services [member]
Disclosure of expenses [line items]
Provided by Thomson Reuters to Refinitiv Contra-expense	$ 8	$ 26
Provided by Refinitiv to Thomson Reuters (Expense)	(15)	(52)
Properties leased [member]
Disclosure of expenses [line items]
Provided by Thomson Reuters to Refinitiv Contra-expense	23	39
Provided by Refinitiv to Thomson Reuters (Expense)	$ (13)	$ (34)

Related Party Transactions - _2

Related Party Transactions - Summary of Key Management Personnel Compensation, Including Directors (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Related party transactions [abstract]
Salaries and other benefits	$ 41	$ 60
Share-based payments	16	20
Total compensation	$ 57	$ 80

Subsequent Events - Additional

Subsequent Events - Additional information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Billions	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 29, 2020	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 29, 2021
Disclosure of non-adjusting events after reporting period [Line Items]
Dividends declared per common share			$ 1.52	$ 1.44
Major business combination [member] | Refinitiv [member] | LSEG [member]
Disclosure of non-adjusting events after reporting period [Line Items]
No of shares acquired through sale of Refinitiv					82.5
Market value of shares acquired through sale of Refinitiv					$ 9.8
Gain on sale of Refinitiv		$ 8.5
Dividends declared after year ended [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Dividends declared per common share	$ 0.10
New annual dividends paid ordinary shares per share	1.62
Dividend paid per common share	$ 0.405