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Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 30, 2019
Document and entity information [abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Registrant Name	THOMSON REUTERS CORP /CAN/
Entity Central Index Key	0001075124
Current Fiscal Year End Date	--12-31

Consolidated Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Consolidated Income Statement - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONTINUING OPERATIONS
Revenues	$ 1,423	$ 1,311	$ 2,910	$ 2,690
Operating expenses	(1,070)	(964)	(2,161)	(1,916)
Depreciation	(38)	(29)	(72)	(59)
Other operating gains, net	261	14	305	12
Operating profit	447	204	721	472
Finance costs, net:
Net interest expense	(37)	(81)	(72)	(159)
Other finance (costs) income	(18)	14	(29)	21
Income before tax and equity method investments	392	137	620	334
Share of post-tax (losses) earnings in equity method investments	(126)	2	(223)	4
Tax (expense) benefit	(50)	3	(55)	(24)
Earnings from continuing operations	216	142	342	314
(Loss) earnings from discontinued operations, net of tax	(27)	515	(37)	32
Net earnings	189	657	305	346
Earnings attributable to:
Common shareholders	$ 189	625	$ 305	286
Non-controlling interests		$ 32		$ 60
Basic earnings (loss) per share:
From continuing operations	$ 0.43	$ 0.20	$ 0.68	$ 0.44
From discontinued operations	(0.05)	0.68	(0.08)	(0.04)
Basic earnings per share	0.38	0.88	0.60	0.40
Diluted earnings (loss) per share:
From continuing operations	0.43	0.20	0.68	0.44
From discontinued operations	(0.06)	0.68	(0.08)	(0.04)
Diluted earnings per share	$ 0.37	$ 0.88	$ 0.60	$ 0.40
Computer software [member]
CONTINUING OPERATIONS
Amortization	$ (104)	$ (100)	$ (209)	$ (198)
Other identifiable intangible assets [member]
CONTINUING OPERATIONS
Amortization	$ (25)	$ (28)	$ (52)	$ (57)

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement [LineItems]
Net earnings	$ 189	$ 657	$ 305	$ 346
Items that have been or may be subsequently reclassified to net earnings:
Cash flow hedges adjustments to net earnings	(10)	28	(19)	68
Cash flow hedges adjustments to equity	5	(30)	14	(58)
Foreign currency translation adjustments to equity	2	(360)	35	(201)
Share of other comprehensive income (loss) in equity method investments	5		(26)
Related tax (expense) benefit on share of other comprehensive income (loss) in equity method investments	(2)		6
Reclassification of foreign currency translation adjustments on disposal of businesses	9		9
Other comprehensive income that will be reclassified to profit or loss, net of tax	9	(362)	19	(191)
Items that will not be reclassified to net earnings:
Fair value adjustments on financial assets	3		1
Remeasurement on defined benefit pension plans	(3)	65	(10)	111
Related tax (expense) benefit on remeasurement on defined benefit pension plans		(15)	2	(27)
Share of other comprehensive income in equity method investments	15		9
Related tax expense on share of other comprehensive income in equity method investments	(3)		(2)
Other comprehensive income that will not be reclassified to profit or loss, net of tax	12	50		84
Other comprehensive income (loss)	21	(312)	19	(107)
Total comprehensive income	210	345	324	239
Continuing Operations [member]
Common shareholders:
Common shareholders	237	74	361	223
Discontinued operations [member]
Common shareholders:
Common shareholders	$ (27)	239	$ (37)	(44)
Non-controlling interests
Non-controlling interests - discontinued operations		$ 32		$ 60

Consolidated Statement of Financial Position - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Statement of financial position [abstract]
Cash and cash equivalents	$ 2,108	$ 2,706
Trade and other receivables	1,178	1,313
Other financial assets	48	76
Prepaid expenses and other current assets	527	434
Current assets	3,861	4,529
Computer hardware and other property, net	470	473
Computer software, net	881	908
Other identifiable intangible assets, net	3,272	3,324
Goodwill	5,078	5,076
Equity method investments	1,969	2,207
Other financial assets	363	53
Other non-current assets	528	446
Deferred tax	31	31
Total assets	16,453	17,047
Liabilities
Current indebtedness		3
Payables, accruals and provisions	1,063	1,549
Deferred revenue	845	815
Other financial liabilities	92	95
Current liabilities	2,000	2,462
Long-term indebtedness	3,233	3,213
Provisions and other non-current liabilities	1,178	1,268
Other financial liabilities	232	79
Deferred tax	712	799
Total liabilities	7,355	7,821
Equity
Capital	5,381	5,348
Retained earnings	4,577	4,755
Accumulated other comprehensive loss	(860)	(877)
Total equity	9,098	9,226
Total liabilities and equity	16,453	17,047
Contingencies (note 18)	$ 0	$ 0

Consolidated Statement of Cash Flow - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Consolidated Statement of Cash Flow - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
OPERATING ACTIVITIES
Earnings from continuing operations	$ 216	$ 142	$ 342	$ 314
Adjustments for:
Depreciation	38	29	72	59
Net losses (gains) on disposals of businesses and investments	3		(21)
Deferred tax	(9)	(30)	(73)	(25)
Other	(77)	11	53	58
Pension contribution			(167)
Changes in working capital and other items	(94)	72	(262)	(100)
Operating cash flows from continuing operations	206	352	205	561
Operating cash flows from discontinued operations	(65)	451	(122)	661
Net cash provided by operating activities	141	803	83	1,222
INVESTING ACTIVITIES
Acquisitions, net of cash acquired	(1)	(1)	(5)	(28)
Proceeds from disposals of businesses and investments, net of taxes paid	23		57
Capital expenditures	(130)	(131)	(240)	(310)
Proceeds from disposals of property and equipment	2	27	2	27
Other investing activities	1	18	4	18
Investing cash flows from continuing operations	(105)	(87)	(182)	(293)
Investing cash flows from discontinued operations		(138)	29	(246)
Net cash used in investing activities	(105)	(225)	(153)	(539)
FINANCING ACTIVITIES
Proceeds from debt				1,370
Repayments of debt		(870)		(870)
Net borrowings under short-term loan facilities		1,313		61
Payments of lease principal	(12)		(23)
Repurchases of common shares		(359)	(190)	(359)
Other financing activities	2	1	37	1
Financing cash flows from continuing operations	(186)	(154)	(527)	(273)
Financing cash flows from discontinued operations		(24)		(35)
Net cash used in financing activities	(186)	(178)	(527)	(308)
(Decrease) increase in cash and bank overdrafts	(150)	400	(597)	375
Translation adjustments		(13)	2	(12)
Cash and bank overdrafts at beginning of period	2,258	844	2,703	868
Cash and bank overdrafts at end of period	2,108	1,231	2,108	1,231
Cash and bank overdrafts at end of period comprised of:
Cash and cash equivalents	2,108	879	2,108	879
Cash and cash equivalents in assets held for sale		356		356
Bank overdrafts		(4)		(4)
Cash and bank overdrafts at end of period	2,108	1,231	2,108	1,231
Supplemental cash flow information is provided in note 17.
Interest paid	(82)	(114)	(96)	(142)
Interest received	10	4	27	5
Income taxes paid	(62)	(33)	(169)	(95)
Preference shares [member]
FINANCING ACTIVITIES
Dividends paid	(1)		(2)	(1)
Number of common shares [member]
FINANCING ACTIVITIES
Dividends paid	(175)	(239)	(349)	(475)
Computer software [member]
Adjustments for:
Amortization expense	104	100	209	198
Other identifiable intangible assets [member]
Adjustments for:
Amortization expense	$ 25	$ 28	$ 52	$ 57

Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Preference shares [member]	Number of common shares [member]	Repurchases of common shares [member]	Stated share capital [member]	Stated share capital [member] Repurchases of common shares [member]	Contributed surplus [member]	Total capital [member]	Total capital [member] Repurchases of common shares [member]	Retained earnings [member]	Retained earnings [member] Preference shares [member]	Retained earnings [member] Number of common shares [member]	Retained earnings [member] Repurchases of common shares [member]	Unrecognized gain (loss) on financial instruments [member]	Foreign currency translation adjustments [member]	Total accumulated other comprehensive loss AOCL [member]	Shareholders' equity [member]	Shareholders' equity [member] Preference shares [member]	Shareholders' equity [member] Number of common shares [member]	Shareholders' equity [member] Repurchases of common shares [member]	Non-controlling interests [member]
Balance (After IFRS 15 adoption [member]) at Dec. 31, 2017	$ 13,747				$ 9,306		$ 243	$ 9,549		$ 7,373				$ 16	$ (3,689)	$ (3,673)	$ 13,249				$ 498
Balance (Adjustments Due to Adoption of IFRS 15 [member]) at Dec. 31, 2017	172									172							172
Balance at Dec. 31, 2017	13,575				9,306		243	9,549		7,201				16	(3,689)	(3,673)	13,077				498
Statement [LineItems]
Net earnings	346									286							286				60
Dividends declared		$ (1)	$ (490)								$ (1)	$ (490)						$ (1)	$ (490)
Other comprehensive income (loss)	(107)									84				10	(201)	(191)	(107)
Shares issued under Dividend Reinvestment Plan ("DRIP")	15				15			15									15
Total comprehensive income (loss)	239									370				10	(201)	(191)	179				60
Repurchases of common shares				$ (373)		$ (123)			$ (123)				$ (250)							$ (373)
Change in ownership interest of subsidiary	24									27							27				(3)
Distributions to non-controlling interests	(35)																				(35)
Pre-defined share repurchase plan	(967)				(313)			(313)		(654)							(967)
Stock compensation plans	4				88		(84)	4									4
Balance at Jun. 30, 2018	12,163				8,973		159	9,132		6,375				26	(3,890)	(3,864)	$ 11,643				$ 520
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	9,237				3,443		1,905	5,348		4,766				10	(887)	(877)
Balance at Dec. 31, 2018	9,226				3,443		1,905	5,348		4,755				10	(887)	(877)
Statement [LineItems]
Net earnings	305									305
Dividends declared		$ (2)	$ (361)								$ (2)	$ (361)
Other comprehensive income (loss)	19									2				(25)	42	17
Shares issued under Dividend Reinvestment Plan ("DRIP")	12				12			12
Total comprehensive income (loss)	324									307				(25)	42	17
Repurchases of common shares				$ (151)		$ (18)			$ (18)				$ (133)
Stock compensation plans	39				140		(101)	39
Balance at Jun. 30, 2019	$ 9,098				$ 3,577		$ 1,804	$ 5,381		$ 4,577				$ (15)	$ (845)	$ (860)

Business Description and Basis of Preparation

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Business Description and Basis of Preparation

Note 1: Business Description and Basis of Preparation

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 major provider of news and information-based tools to professionals.

Basis of preparation

The unaudited consolidated interim financial statements (“interim financial statements”) were prepared using the same accounting policies and methods as those used in the Company’s consolidated financial statements for the year ended December 31, 2018, except as described below. The interim financial statements comply with International Accounting Standard 34, Interim Financial Reporting (“IAS 34”). Accordingly, certain information and footnote disclosure normally included in annual financial statements prepared in accordance with International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board (“IASB”), have been omitted or condensed. The preparation of financial statements in accordance with IAS 34 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 have been disclosed in note 2 of the consolidated financial statements for the year ended December 31, 2018. These interim financial statements should be read in conjunction with the Company’s consolidated financial statements for the year ended December 31, 2018, which are included in the Company’s 2018 annual report.

On October 1, 2018, the Company sold a 55% interest in its Financial & Risk business to private equity funds managed by Blackstone. The Company retained a 45% interest in the business, which is now known as Refinitiv. The Financial & Risk business was reported as a discontinued operation from the beginning of 2018 to the closing date.

The accompanying interim financial statements include all adjustments, composed of normal recurring adjustments, considered necessary by management to fairly state the Company’s results of operations, financial position and cash flows. The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year.

References to “$” are to U.S. dollars and references to “C$” are to Canadian dollars.

Changes in accounting policy

Effective January 1, 2019, the Company adopted IFRS 16, Leases (“IFRS 16”), which introduced a single lease accounting model that eliminated the prior distinction between operating and finance leases for lessees. IFRS 16 was adopted using the modified retrospective method, including a set of practical expedients and elections. Under this approach, the cumulative effect of adoption of $11 million was recorded as an adjustment to retained earnings at January 1, 2019 and comparative period information was not restated. From January 1, 2019, the Company:

^●

Recognizes right-of-use assets and lease liabilities on the consolidated statement of financial position for leases having a term of more than 12 months;

^●

Depreciates right-of-use assets on a straight-line basis over the shorter of the estimated useful life of the asset or the remaining lease term;

^●

Presents interest expense on lease liabilities as a component of “Finance costs, net,” within the consolidated income statement;

^●

Presents the principal portion of its total lease payments within “Financing activities” and the interest portion within “Operating activities” on the consolidated statement of cash flow; and

^●

Recognizes a receivable, which arises from sublease arrangements, equal to the net investment in the lease on the consolidated statement of financial position.

Prior to January 1, 2019, the Company classified all lease commitments as operating and did not record them on the consolidated statement of financial position. Operating lease payments were recognized as expense on a straight-line basis over the lease term in “Operating expenses” within the consolidated income statement and operating lease payments were reported as “Operating activities” in the consolidated statement of cash flow.

The Company applied certain practical expedients and elections at January 1, 2019, the initial application date of IFRS 16. Specifically, the Company:

^●

Continued to treat contracts determined to be leases under the prior accounting standard as leases under IFRS 16;

^●

Measured right-of-use assets and lease liabilities, regardless of commencement date, using incremental borrowing rates as of January 1, 2019;

^●

Retained prior assessments of onerous lease contracts under IAS 37 Provisions, Contingent Liabilities and Contingent Assets; and

^●

Excluded from recognized assets and liabilities, as applicable (a) initial direct costs to enter the lease, (b) leases with a remaining term of 12 months or less from January 1, 2019 and (c) low-value leases, all of which will continue to be accounted for as “Operating expenses” in the consolidated income statement.

The following table reconciles operating lease commitments at December 31, 2018 to lease liabilities recognized in the consolidated statement of financial position at January 1, 2019, the date of initial application:

January 1,

2019

Operating lease commitments at December 31, 2018

329

Leases beginning after January 1, 2019

(65)

Operating lease commitments subject to IFRS 16

264

Discounted at 4.1%, the weighted-average incremental borrowing rate at January 1, 2019

(26)

Exemption for short-term leases

(41)

Lease liabilities at January 1, 2019

197

The following table sets forth the adoption impacts on the consolidated statement of financial position at January 1, 2019:

December 31,

January 1,

2018 As

IFRS 16 Adoption

2019

Reported

Adjustment

Opening Balance

Other financial assets—current

Prepaid expenses and other current assets

434

(5)

429

Computer hardware and other property, net

473

128

601

Other financial assets—non-current

Total assets

17,047

163

17,210

Payables, accruals and provisions

1,549

(31)

1,518

Other financial liabilities—current

138

Provisions and other non-current liabilities

1,268

(14)

1,254

Other financial liabilities—non-current

154

233

Total liabilities

7,821

152

7,973

Retained earnings

4,755

4,766

Total assets increased by $163 million, primarily due to the recognition of right-of-use assets of $128 million, and net investments in subleases of $40 million. Total liabilities increased by $152 million, as the recognition of $197 million of new lease liabilities was offset by the reclassification of liabilities associated with the former operating leases.

Effective January 1, 2019, the Company adopted IAS 19 amendments, Plan Amendment, Curtailment or Settlement, which clarifies the accounting for amendments, curtailments or settlements for defined benefit plans. These changes require an entity to remeasure its defined benefit liability and use the updated assumptions from the remeasurement to determine current service and net interest for the remainder of the reporting period after the change. The IAS 19 amendments did not have a material impact on the consolidated income statement and cash flow for the three and six months ended June 30, 2019 and financial position for the six months ended June 30, 2019.

Effective January 1, 2019, the Company adopted International Financial Reporting Interpretations Committee (“IFRIC”) 23, Uncertainty over Income Tax Treatments, which adds to the requirements of IAS 12, Income Taxes, by specifying how to reflect the effects of uncertainty in the accounting for income taxes. An uncertainty arises when it is unclear how a tax law applies to a particular transaction, or whether a taxation authority will accept a company’s tax treatment. IFRIC 23 did not have a material impact on the consolidated income statement and cash flow for the three and six months ended June 30, 2019 and financial position for the six months ended June 30, 2019.

Accounting Policies

Leases

For periods beginning from January 1, 2019:

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 asset for the underlying leased asset and corresponding lease liability are recognized in the consolidated statement of financial position measured on a present value basis. Lease payments are discounted using the interest rate implicit in the lease. If that rate cannot be readily determined, the Company uses its incremental borrowing rate, which is the interest rate that the Company would pay to borrow funds to obtain an asset of a similar value to the right-of-use asset with a comparable security, economic environment and term.

The right-of-use asset is included in “Computer hardware and other property, net” and the lease liability is included in “Other financial liabilities” (current or non-current, based on maturity) within the consolidated statement of financial position.

Right-of-use assets are measured on a number of factors including:

^●

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 payments over the lease term, which may include:

^●

Fixed payments (including in-substance fixed payments), less any lease incentives receivable;

^●

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 asset and liability. The reasonably certain assessment is made at the lease commencement date and re-assessed if there is a material change in circumstances supporting the assessment.

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 asset is depreciated over the shorter of the asset’s useful life or the lease term on a straight-line basis and presented within “Depreciation” in the consolidated income statement.

Most of the Company’s leases are comprised of property leases, for which fixed payments covering lease and non-lease components are included in the value of the right-of-use assets and lease liabilities.

Payments for leases with a term of 12 months or less and low-value leases are recognized on a straight-line basis within “Operating expenses” in the consolidated income statement and are not recognized in the consolidated statement of financial position.

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 payments to be received by the Company over the lease term. The payments are discounted using the interest rate implicit in the lease, if this can be readily determined, or at the Company’s incremental borrowing rate, if the implicit rate cannot be determined. A gain or loss is recorded in “Other operating gains (losses), net,” within the consolidated income statement for the difference between the carrying value of the underlying asset and the lease receivable. Lease payments are apportioned between the lease receivable and finance income, which is reported within “Finance costs, net” in the consolidated income statement.

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.

Revenues

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Revenues

Note 2: Revenues

Revenues by type and geography

The following tables disaggregate revenues by type and geography and reconcile them to reportable segments for the three and six months ended June 30, 2019 and 2018 (see note 3).



Revenues by type	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Three months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
Recurring		555		539		269		243		147		139		144		63		-		-		1,115		984
Transactions		48		54		49		53		35		37		12		9		-		-		144		153
Global Print		-		-		-		-		-		-		-		-		164		174		164		174
Eliminations		-		-		-		-		-		-		-		-		-		-		-		-
Total		603		593		318		296		182		176		156		72		164		174		1,423		1,311



Revenues by type	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Six months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
Recurring		1,105		1,072		538		486		320		306		287		125		-		-		2,250		1,989
Transactions		92		106		132		139		84		87		24		19		-		-		332		351
Global Print		-		-		-		-		-		-		-		-		329		351		329		351
Eliminations		-		-		-		-		-		-		-		-		-		-		(1)		(1)
Total		1,197		1,178		670		625		404		393		311		144		329		351		2,910		2,690



Revenues by geography (country of destination)	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Three months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
U.S.		492		485		257		232		143		138		103		19		116		122		1,111		996
Canada (country of domicile)		12		11		3		2		8		8		-		-		20		21		43		42
Other		6		5		14		18		20		19		4		2		7		6		51		50
Americas (North America, Latin America, South America)		510		501		274		252		171		165		107		21		143		149		1,205		1,088

U.K.		49		54		30		27		7		7		7		7		9		13		102		108
Other		18		16		6		10		-		-		28		29		4		3		56		58
EMEA (Europe, Middle East and Africa)		67		70		36		37		7		7		35		36		13		16		158		166
Asia Pacific		26		22		8		7		4		4		14		15		8		9		60		57
Eliminations		-		-		-		-		-		-		-		-		-		-		-		-
Total		603		593		318		296		182		176		156		72		164		174		1,423		1,311



Revenues by geography (country of destination)	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Six months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
U.S.		979		961		546		500		328		316		206		37		236		247		2,295		2,061
Canada (country of domicile)		22		21		6		5		17		17		1		1		38		40		84		84
Other		13		12		30		34		41		41		5		4		11		15		100		106
Americas (North America, Latin America, South America)		1,014		994		582		539		386		374		212		42		285		302		2,479		2,251

U.K.		100		107		53		52		11		11		13		14		19		25		196		209
Other		31		32		19		20		-		-		56		58		8		6		114		116
EMEA (Europe, Middle East and Africa)		131		139		72		72		11		11		69		72		27		31		310		325
Asia Pacific		52		45		16		14		7		8		30		30		17		18		122		115
Eliminations		-		-		-		-		-		-		-		-		-		-		(1)		(1)
Total		1,197		1,178		670		625		404		393		311		144		329		351		2,910		2,690

Segment Information

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Segment Information

Note 3: Segment Information

The Company is organized as five reportable segments reflecting how the businesses are managed: Legal Professionals, Corporates, Tax & Accounting Professionals, Reuters News and Global Print. In the second quarter of 2019, the Company changed the name of its Tax Professionals segment to Tax & Accounting Professionals to better reflect the nature of the customers served by the segment. The Company did not change the way that it manages the business. 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, including the seven largest global accounting firms, with the Company’s full suite of offerings across legal, tax, regulatory and compliance functions.

Tax & Accounting Professionals

The Tax & Accounting Professionals segment serves tax, accounting and audit professionals in accounting firms (other than the seven largest firms, which are served by the Corporates segment), as well as governmental taxing authorities with research and workflow products, focusing on intuitive tax offerings and automating tax workflows.

Reuters News

The Reuters News segment provides real-time, multi-media news and information services to newspapers, television and cable networks, radio stations and websites around the globe, as well as to Refinitiv.

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.



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Revenues
Legal Professionals		603		593		1,197		1,178
Corporates		318		296		670		625
Tax & Accounting Professionals		182		176		404		393
Reuters News		156		72		311		144
Global Print		164		174		329		351
Eliminations		-		-		(1)		(1)
Consolidated revenues		1,423		1,311		2,910		2,690

Adjusted EBITDA
Legal Professionals		232		198		459		389
Corporates		102		95		220		206
Tax & Accounting Professionals		60		41		153		121
Reuters News		10		8		26		16
Global Print		73		76		147		157
Corporate costs		(122)		(70)		(253)		(111)
Adjusted EBITDA		355		348		752		778
Fair value adjustments (see note 5)		(2)		(1)		(3)		(4)
Depreciation		(38)		(29)		(72)		(59)
Amortization of computer software		(104)		(100)		(209)		(198)
Amortization of other identifiable intangible assets		(25)		(28)		(52)		(57)
Other operating gains, net		261		14		305		12
Consolidated operating profit		447		204		721		472
Net interest expense		(37)		(81)		(72)		(159)
Other finance (costs) income		(18)		14		(29)		21
Share of post-tax (losses) earnings in equity method investments		(126)		2		(223)		4
Tax (expense) benefit		(50)		3		(55)		(24)
Earnings from continuing operations		216		142		342		314

In accordance with IFRS 8, Operating Segments, the Company discloses certain information about its reportable segments based upon measures used by management in assessing the performance of those reportable segments. These measures are defined below and may not be comparable to similar measures of other companies.

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 earnings or losses in equity method investments, other operating gains and losses, certain asset impairment charges, fair value adjustments, and corporate related items.

^●

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, commercial sales operations, real estate, and product and content development, as well as an allocation of product costs when one segment sells products managed by another segment.

^●

Consolidated adjusted EBITDA is comprised of adjusted EBITDA from reportable segments and Corporate costs.

Seasonality	6 Months Ended
Seasonality	Jun. 30, 2019
Text block [abstract]
Seasonality	*Note 4: Seasonality* The Company’s revenues and operating profit on a consolidated basis do not tend to be significantly impacted by seasonality as it records a large portion of its revenues ratably over a contract term and its costs are generally incurred evenly throughout the year. However, the Company’s revenues from quarter to consecutive quarter can be impacted by the release of certain tax products, which tend to be concentrated in the fourth quarter and, to a lesser extent, in the first quarter of the year. Additionally, the seasonality of the Company’s operating profit may be further impacted by the timing of its corporate costs, as it has been incurring significant costs to reposition its business following the sale of Financial & Risk.

Operating Expenses

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Operating Expenses

Note 5: Operating Expenses

The components of operating expenses include the following:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Salaries, commissions and allowances		609		592		1,231		1,178
Share-based payments		15		14		27		23
Post-employment benefits		34		34		68		72
Total staff costs		658		640		1,326		1,273
Goods and services⁽¹⁾		313		229		645		463
Data		66		59		129		112
Telecommunications		13		9		23		14
Real estate		18		26		35		50
Fair value adjustments⁽²⁾		2		1		3		4
Total operating expenses		1,070		964		2,161		1,916

(1)	Goods and services include professional fees, consulting and outsourcing services, contractors, selling and marketing, and other general and administrative costs.

(2)	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	6 Months Ended
Other Operating Gains, Net	Jun. 30, 2019
Text block [abstract]
Other Operating Gains, Net	*Note 6: Other Operating Gains, Net* Other operating gains, net, were $261 million and $14 million for the three months ended June 30, 2019 and 2018, respectively, and $305 million and $12 million for the six months ended June 30, 2019 and 2018, respectively. The three and six months ended June 30, 2019 included a $256 million and $275 million benefit, respectively from the revaluation of warrants that the Company holds in Refinitiv (see note 12). Each period also included income related to a license that allows Refinitiv to use the “Reuters” mark to brand its products and services (see note 19) and the six months ended June 30, 2019 also included net gains from the sale of several small businesses. The three and six months ended June 30, 2018 included a gain on the sale of a Canadian wholly-owned subsidiary to a company affiliated with The Woodbridge Company Limited (“Woodbridge”), the Company’s principal shareholder.

Finance Costs, Net

6 Months Ended

Jun. 30, 2019

Text block [abstract]

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:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Interest expense:
Debt		39		74		77		144
Derivative financial instruments - hedging activities		-		2		1		3
Other, net		5		1		9		2
Fair value losses on financial instruments:
Cash flow hedges, transfer from equity		(10)		28		(19)		68
Net foreign exchange losses (gains) on debt		10		(28)		19		(68)
Net interest expense - debt and other		44		77		87		149
Interest expense - leases⁽¹⁾		1		-		3		-
Net interest expense - pension and other post-employment benefit plans		7		7		13		14
Interest income		(15)		(3)		(31)		(4)
Net interest expense		37		81		72		159

(1)	Relates to the 2019 adoption of IFRS 16. See note 1.



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Net losses (gains) due to changes in foreign currency exchange rates		18		(5)		29		(18)
Net gains on derivative instruments		-		(9)		-		(3)
Other finance costs (income)		18		(14)		29		(21)

Net losses (gains) due to changes in foreign currency exchange rates

Net losses (gains) due to changes in foreign currency exchange rates were principally comprised of amounts related to certain intercompany funding arrangements.

Net gains on derivative instruments

Net gains on derivative instruments were principally comprised of amounts relating to foreign exchange contracts.

Equity Method Investments

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Equity Method Investments

Note 8: Equity Method Investments

Equity method investments are primarily comprised of the Company’s 45% investment in Refinitiv.

The Company’s share of post-tax (losses) earnings in equity method investments as reported in the consolidated income statement is comprised of the following:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Refinitiv (45% ownership interest)		(129)		-		(231)		-
Other equity method investments		3		2		8		4
Total share of post-tax (losses) earnings in equity method investments		(126)		2		(223)		4

The composition of equity method investments as reported in the consolidated statement of financial position is comprised of the following:



	June 30,		December 31,

	2019		2018
Refinitiv (45% ownership interest)		1,805		2,052
Other equity method investments		164		155
Total equity method investments		1,969		2,207

Set forth below is summarized financial information for 100% of Refinitiv, and a reconciliation to the Company’s carrying value of its investment.



	Three months ended June 30,		Six months ended June 30,

	2019		2019
Revenues		1,550		3,117

Net loss		(267)		(477)
Remove: Net earnings attributable to non-controlling interests		(11)		(29)
Net loss attributable to Refinitiv		(278)		(506)
Other comprehensive income (loss) attributable to Refinitiv		46		(31)
Total comprehensive loss attributable to Refinitiv		(232)		(537)



	June 30,		December 31,

	2019		2018
Assets
Current assets		2,168		2,284
Non-current assets		21,007		20,978
Total assets		23,175		23,262
Liabilities
Current liabilities		1,880		1,842
Non-current liabilities		14,258		13,966
Total liabilities		16,138		15,808
Net assets		7,037		7,454
Non-controlling interests		(2,014)		(1,924)
Preference shares and other excluded items		(1,013)		(971)
Net assets attributable to Refinitiv		4,010		4,559

Net assets attributable to Refinitiv - beginning period		4,559		5,218
Net loss attributable to Refinitiv		(506)		(487)
Other comprehensive loss attributable to Refinitiv		(31)		(172)
Other adjustments⁽¹⁾		(12)		-
Net assets attributable to Refinitiv - ending period		4,010		4,559
Thomson Reuters % share		45%		45%
Thomson Reuters carrying amount		1,805		2,052

(1)	Relates to an adjustment associated with the audit of Refinitiv’s 2018 annual financial statements.

Taxation	6 Months Ended
Taxation	Jun. 30, 2019
Text block [abstract]
Taxation	*Note 9: Taxation* Tax expense (benefit) was $50 million and $(3) million for the three months ended June 30, 2019 and 2018, respectively, and $55 million and $24 million for the six months ended June 30, 2019 and 2018, respectively. The tax expense (benefit) in each period reflected the mix of taxing jurisdictions in which pre-tax profits and losses were recognized. Because the geographical mix of pre-tax profits and losses in interim periods may be different from that for the full year, tax expense or benefit in interim periods is not necessarily indicative of tax expense (benefit) for the full year.

Discontinued Operations

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Discontinued Operations

Note 10: Discontinued Operations

On October 1, 2018, the Company sold a 55% interest in its Financial & Risk business. The Company retained a 45% interest in the business, which is now known as Refinitiv. The three and six months ended June 30, 2018 include the results of Financial & Risk reported as discontinued operations in the consolidated financial statements. The three and six months ended June 30, 2019 included residual expenses and charges related to liabilities associated with businesses that were previously classified as discontinued operations, including Financial & Risk.

(Loss) earnings from discontinued operations are summarized as follows:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Revenues		-		1,553		-		3,136
Expenses		(27)		(1,022)		(37)		(2,220)
(Loss) earnings from discontinued operations before income tax		(27)		531		(37)		916
Tax expense⁽¹⁾		-		(16)		-		(884)
(Loss) earnings from discontinued operations, net of tax		(27)		515		(37)		32

(1)

The three months and six months ended June 30, 2018 reflected a $32 million deferred tax benefit and an $812 million deferred tax charge, respectively, that was recorded when the Financial & Risk business was classified as held for sale. These deferred taxes were not previously required as the business was not considered held for sale until January 2018. The benefit in the three-month period ended June 30, 2018 represented a revision to an estimate recorded in the three-month period ended March 31, 2018.

Earnings Per Share

6 Months Ended

Jun. 30, 2019

Text block [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:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Earnings attributable to common shareholders		189		625		305		286
Less: Dividends declared on preference shares		(1)		-		(2)		(1)
Earnings used in consolidated earnings per share		188		625		303		285
Less: Loss (earnings) from discontinued operations, net of tax		27		(515)		37		(32)
Remove: Non-controlling interests from discontinued operations		-		32		-		60
Earnings used in earnings per share from continuing operations		215		142		340		313

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:

Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

Weighted-average number of common shares outstanding

500,705,054

708,974,582

501,035,457

709,448,598

Weighted-average number of vested DSUs

526,158

699,588

522,677

767,352

Basic

501,231,212

709,674,170

501,558,134

710,215,950

Effect of stock options and TRSUs

1,809,524

421,224

1,594,354

581,482

Diluted

503,040,736

710,095,394

503,152,488

710,797,432

Financial Instruments

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Financial Instruments

Note 12: Financial Instruments

Financial assets and liabilities

Financial assets and liabilities in the consolidated statement of financial position are as follows:

June 30, 2019

Assets/

(Liabilities) at
Amortized
Cost

Assets/

(Liabilities)
at Fair
Value
through
Earnings

Assets at Fair
Value through
Other
Comprehensive
Income

Derivatives
Used for
Hedging

Total

Cash and cash equivalents

1,221

887

2,108

Trade and other receivables

1,178

Other financial assets - current

Other financial assets - non-current

291

363

Trade payables (see note 14)

(191)

Accruals (see note 14)

(570)

Other financial liabilities - current⁽¹⁾

(92)

Long-term indebtedness

(3,233)

Other financial liabilities - non current⁽²⁾

(169)

(1)

(62)

(232)

Total

(1,760)

1,177

(62)

(621)

(1)	Includes lease liabilities of $49 million recognized in 2019 due to the adoption of IFRS 16. See note 1.

(2)	Includes lease liabilities of $168 million recognized in 2019 due to the adoption of IFRS 16. See note 1.

December 31, 2018

Assets/

(Liabilities) at
Amortized
Cost

Assets/

(Liabilities)
at Fair
Value
through
Earnings

Assets at Fair
Value through
Other
Comprehensive
Income

Derivatives
Used for
Hedging

Total

Cash and cash equivalents

316

2,390

2,706

Trade and other receivables

1,313

Other financial assets - current

Other financial assets - non-current

Current indebtedness

(3)

Trade payables (see note 14)

(326)

Accruals (see note 14)

(854)

Other financial liabilities - current

(95)

Long-term indebtedness

(3,213)

Other financial liabilities - non current

(1)

(2)

(76)

(79)

Total

(2,774)

2,405

(76)

(422)

Cash and cash equivalents

Of total cash and cash equivalents, $34 million and $24 million at June 30, 2019 and December 31, 2018, respectively, were held in subsidiaries which have regulatory restrictions, contractual restrictions or operate in countries where exchange controls and other legal restrictions apply and were therefore not available for general use by the Company.

Commercial paper

Under its commercial paper program, the Company may issue up to $2.0 billion of notes. There was no outstanding commercial paper at June 30, 2019.

Credit facility

The Company has a $2.4 billion credit facility agreement which matures in November 2021 and may be used to provide liquidity for general corporate purposes (including support for its commercial paper program). There were no outstanding borrowings under this credit facility at June 30, 2019. Based on the Company’s credit ratings, the cost of borrowing under the agreement is priced at LIBOR/EURIBOR plus 110 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 $3.0 billion.

Fair Value

The fair values of cash, 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, in the consolidated statement of financial position, as appropriate.

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 taking into account non-performance risk.

The following is a summary of debt and related derivative instruments that hedge the cash flows of debt:

Carrying Amount

Fair Value

June 30, 2019

Primary Debt
Instruments

Derivative
Instruments
Liability

Primary Debt
Instruments

Derivative
Instruments
Liability

C$550, 3.309% Notes, due 2021

420

432

$350, 3.95% Notes, due 2021⁽¹⁾

138

142

$600, 4.30% Notes, due 2023

596

637

$450, 3.85% Notes, due 2024⁽¹⁾

241

250

$500, 3.35% Notes, due 2026

496

502

$350, 4.50% Notes, due 2043⁽¹⁾

116

$350, 5.65% Notes, due 2043

341

393

$400, 5.50% Debentures, due 2035

395

439

$500, 5.85% Debentures, due 2040

490

577

Total

3,233

3,488

Long-term

3,233


	Carrying Amount				Fair Value
December 31, 2018	Primary Debt Instruments		Derivative Instruments Liability		Primary Debt Instruments		Derivative Instruments Liability
Bank and other		3		-		3		-
C$550, 3.309% Notes, due 2021		402		76		407		76
$350, 3.95% Notes, due 2021⁽¹⁾		138		-		139		-
$600, 4.30% Notes, due 2023		596		-		607		-
$450, 3.85% Notes, due 2024⁽¹⁾		240		-		233		-
$500, 3.35% Notes, due 2026		495		-		458		-
$350, 4.50% Notes, due 2043⁽¹⁾		116		-		105		-
$350, 5.65% Notes, due 2043		341		-		364		-
$400, 5.50% Debentures, due 2035		395		-		406		-
$500, 5.85% Debentures, due 2040		490		-		524		-
Total		3,216		76		3,246		76
Current portion		3		-
Long-term portion		3,213		76

(1)	Notes were partially redeemed in October 2018.

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:

June 30, 2019

Total

Assets

Level 1

Level 2

Level 3

Balance

Money market accounts

887

Warrants⁽¹⁾

291

Financial assets at fair value through earnings

887

291

1,178

Financial assets at fair value through other comprehensive income⁽²⁾

Total assets

907

291

1,202

Liabilities

Contingent consideration⁽³⁾

(1)

Financial liabilities at fair value through earnings

(1)

Derivatives used for hedging⁽⁴⁾

(62)

Total liabilities

(62)

(1)

(63)



December 31, 2018				Total

Assets	Level 1	Level 2	Level 3		Balance

Money market accounts	-	2,390	-		2,390

Warrants⁽¹⁾	-	-	16		16

Embedded derivatives⁽⁵⁾	-	1	-		1

Financial assets at fair value through earnings	-	2,391	16		2,407

Financial assets at fair value through other comprehensive income⁽²⁾	2	21	-		23

Total assets	2	2,412	16		2,430

Liabilities

Contingent consideration⁽³⁾	-	-	(2)		(2)

Financial liabilities at fair value through earnings	-	-	(2)		(2)

Derivatives used for hedging⁽⁴⁾	-	(76)	-		(76)

Total liabilities	-	(76)	(2)		(78)

(1)	Warrants related to the Company’s equity method investment in Refinitiv (see note 8).

(2)	Investments in entities over which the Company does not have control, joint control or significant influence.

(3)	Obligations to pay additional consideration for prior acquisitions, based upon performance measures contractually agreed at the time of purchase.

(4)	Comprised of fixed-to-fixed cross-currency swaps on indebtedness.

(5)	Largely related to U.S. dollar pricing of customer agreements by subsidiaries outside of the U.S.

The following reflects the change in Refinitiv warrants level 3 fair value measurement for the six months ended June 30, 2019:



	Six months ended June 30, 2019
December 31, 2018		16
Gain recognized within other operating gains, net		275
June 30, 2019		291

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 six months ended June 30, 2019.

Valuation Techniques

The fair value of financial instruments that are not traded in an active market (for example, over-the-counter derivatives) is determined by using valuation techniques. These valuation techniques maximize the use of observable market data where it is available and rely as little as possible on entity specific estimates. If all significant inputs required to fair value an instrument are observable, the instrument is included in level 2. If one or more of the significant inputs is not based on observable market data, the instrument is included in level 3.

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 are calculated as the present value of the estimated future cash flows based on observable yield curves; and

^●

the fair value of contingent consideration is calculated based on estimates of future revenue performance.

Valuation of the Refinitiv Warrants

^●

The fair value of the warrants in Refinitiv are generally calculated using a Monte Carlo simulation approach that 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 result in an increase in the fair value of the warrants and conversely, a decrease would typically result in a decrease in the fair value of the warrants.

^●

On August 1, 2019, the Company and private equity funds affiliated with Blackstone agreed to sell Refinitiv, in which the Company owns a 45%⁽¹⁾ interest, to the London Stock Exchange Group plc (“LSEG”), in an all share transaction that values Refinitiv at $27 billion (see note 20). Under the terms of the warrant agreement, the proposed transaction will constitute a change in control whereby the exercise of the warrants in connection with the closing of the transaction will increase the Company’s ownership of Refinitiv from 45%⁽¹⁾ to 47.6%⁽¹⁾. As a result of the entry into a definitive agreement for the sale of the Refinitiv business, the value of the warrants at June 30, 2019 is primarily based on the number of incremental shares in Refinitiv to which the Company is entitled upon closing and the share price of LSEG on June 30, 2019. The valuation also incorporates various outcomes (on a weighted average basis) based on the likelihood of the proposed transaction closing. In future periods, the warrants will be revalued based on the share price of LSEG at each reporting date, and will reflect management’s continuing assessment about the likelihood that the proposed transaction will close, including progress towards obtaining approval by LSEG shareholders, regulatory clearances and satisfying customary closing conditions.

(1)

Represents ownership interest before dilution for management equity triggered by a change in control.

Other Non-Current Assets

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Other Non-Current Assets

Note 13: Other Non-Current Assets



	June 30,		December 31,

	2019		2018

Net defined benefit plan surpluses⁽¹⁾		79		7

Cash surrender value of life insurance policies		313		300

Deferred commissions		74		82

Other non-current assets		62		57

Total other non-current assets		528		446

(1)	The funded status of the defined benefit pension plan covering U.K. employees changed from a net obligation to a net surplus as the Company contributed $167 million to the plan in February 2019. See note 15.

Payables, Accruals and Provisions

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Payables, Accruals and Provisions

Note 14: Payables, Accruals and Provisions



	June 30,		December 31,

	2019		2018

Trade payables		191		326

Accruals		570		854

Provisions		183		203

Other current liabilities		119		166

Total payables, accruals and provisions		1,063		1,549

Provisions and Other Non-Current Liabilities

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Provisions and Other Non-Current Liabilities

Note 15: Provisions and Other Non-Current Liabilities



	June 30,		December 31,

	2019		2018

Net defined benefit plan obligations⁽¹⁾		655		708

Deferred compensation and employee incentives		140		128

Provisions		115		128

Uncertain tax positions		230		223

Other non-current liabilities		38		81

Total provisions and other non-current liabilities		1,178		1,268

(1)	The funded status of the defined benefit pension plan covering U.K. employees changed from a net obligation to a net surplus as the Company contributed $167 million to the plan in February 2019. See note 13.

Capital

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Capital

Note 16: Capital

Share repurchases

The Company may buy back shares (and subsequently cancel them) from time to time as part of its capital strategy. Share repurchases are typically effected under a normal course issuer bid (“NCIB”), which permits the repurchase of common shares 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 pays for shares in open market transactions under the NCIB is the market price at the time of purchase or such other price as may be permitted by TSX.

Details of share repurchases are as follows:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018

Share repurchases (millions of U.S. dollars)		-		359		190		359

Shares repurchased (number in millions)		-		9.1		3.5		9.1

Share repurchases – average price per share in U.S. dollars		-	$	39.54	$	53.93	$	39.54

The Company did not repurchase any shares in the three months ended June 30, 2019.

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. Details of dividends declared per common share and dividends paid on common shares are as follows:

Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

Dividends declared per common share

$0.360

$0.345

$0.72

$0.69

Dividends declared

180

245

361

490

Dividends reinvested

(5)

(6)

(12)

(15)

Dividends paid

175

239

349

475

Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Supplemental Cash Flow Information

Note 17: Supplemental Cash Flow Information

Details of “Other” in the consolidated statement of cash flow are as follows:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018

Non-cash employee benefit charges		39		40		81		76

Net losses (gains) on foreign exchange and derivative financial instruments		18		(12)		28		(17)

Share of post-tax losses (earnings) in equity method investments		126		(2)		223		(4)

Warrants (see note 12)		(256)		-		(275)		-

Other		(4)		(15)		(4)		3

		(77)		11		53		58

Details of “Changes in working capital and other items” are as follows:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018

Trade and other receivables		(47)		(30)		96		61

Prepaid expenses and other current assets		23		18		49		19

Other financial assets		(2)		6		33		41

Payables, accruals and provisions		(143)		(24)		(396)		(196)

Deferred revenue		98		99		28		45

Other financial liabilities		-		(11)		(33)		(46)

Income taxes		10		18		10		(2)

Other		(33)		(4)		(49)		(22)

		(94)		72		(262)		(100)

Details of income taxes paid are as follows:

Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

Operating activities – continuing operations

(49)

(8)

(114)

(43)

Operating activities – discontinued operations

(12)

(25)

(54)

(52)

Investing activities – continuing operations

(1)

Total income taxes paid

(62)

(33)

(169)

(95)

Contingencies	6 Months Ended
Contingencies	Jun. 30, 2019
Text block [abstract]
Contingencies	*Note 18: Contingencies* 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. 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.

Related Party Transactions

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Related Party Transactions

Note 19: Related Party Transactions

As of June 30, 2019, the Company’s principal shareholder, Woodbridge, beneficially owned approximately 66% of the Company’s shares.

Transactions with Refinitiv

As part of the Company’s sale of a 55% interest in its Financial & Risk business, Reuters News and Refinitiv entered into an agreement which has a term of 30 years from October 1, 2018, pursuant to which Reuters News will supply news and editorial content to the Refinitiv partnership for a minimum of $325 million per year. For the six months ended June 30, 2019, the Company recorded $168 million of revenues under this agreement. 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 six months ended June 30, 2019, the Company recorded $12 million of income in “Other operating gains, net” within the consolidated income statement under this license.

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. For the six months ended June 30, 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)
Transitional services		17		(35)
Properties leased		18		(19)

At June 30, 2019, the consolidated statement of financial position included a receivable from Refinitiv of $268 million and a payable to Refinitiv of $151 million.

Except for the above transactions, there were no other significant related party transactions during the six months ended June 30, 2019. Refer to “Related party transactions” disclosed in note 31 of the Company’s consolidated financial statements for the year ended December 31, 2018, which are included in the Company’s 2018 annual report, for information regarding related party transactions.

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2019
Text block [abstract]
Subsequent Events	*Note 20: Subsequent Events* Acquisitions In July 2019, the Company acquired Confirmation, a provider of digital audit confirmation services to accounting firms, banks and law firms, and HighQ, a provider of collaboration tools to the legal and regulatory market segments. Proposed LSEG/Refinitiv Transaction On August 1, 2019, the Company announced that it and private equity funds affiliated with Blackstone agreed to sell Refinitiv to LSEG in an all share transaction for a total enterprise value of approximately $27 billion. The transaction will result in Blackstone’s consortium and Thomson Reuters ultimately holding a combined 37% economic interest in LSEG, approximately 15% of which would be attributed to Thomson Reuters. The proposed transaction is subject to LSEG shareholder approval, regulatory clearances and customary closing conditions and is expected to close in the second half of 2020. The Company expects to record a significant gain on the transaction upon closing.

Business Description and Basis of Preparation (Policies)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Basis of preparation 1

Basis of preparation

Basis of Presentation 2

References to “$” are to U.S. dollars and references to “C$” are to Canadian dollars.

Changes in accounting policy

Changes in accounting policy

^●

Recognizes right-of-use assets and lease liabilities on the consolidated statement of financial position for leases having a term of more than 12 months;

^●

Depreciates right-of-use assets on a straight-line basis over the shorter of the estimated useful life of the asset or the remaining lease term;

^●

Presents interest expense on lease liabilities as a component of “Finance costs, net,” within the consolidated income statement;

^●

Presents the principal portion of its total lease payments within “Financing activities” and the interest portion within “Operating activities” on the consolidated statement of cash flow; and

^●

Recognizes a receivable, which arises from sublease arrangements, equal to the net investment in the lease on the consolidated statement of financial position.

The Company applied certain practical expedients and elections at January 1, 2019, the initial application date of IFRS 16. Specifically, the Company:

^●

Continued to treat contracts determined to be leases under the prior accounting standard as leases under IFRS 16;

^●

Measured right-of-use assets and lease liabilities, regardless of commencement date, using incremental borrowing rates as of January 1, 2019;

^●

Retained prior assessments of onerous lease contracts under IAS 37 Provisions, Contingent Liabilities and Contingent Assets; and

^●

January 1,

2019

Operating lease commitments at December 31, 2018

329

Leases beginning after January 1, 2019

(65)

Operating lease commitments subject to IFRS 16

264

Discounted at 4.1%, the weighted-average incremental borrowing rate at January 1, 2019

(26)

Exemption for short-term leases

(41)

Lease liabilities at January 1, 2019

197

The following table sets forth the adoption impacts on the consolidated statement of financial position at January 1, 2019:

December 31,

January 1,

2018 As

IFRS 16 Adoption

2019

Reported

Adjustment

Opening Balance

Other financial assets—current

Prepaid expenses and other current assets

434

(5)

429

Computer hardware and other property, net

473

128

601

Other financial assets—non-current

Total assets

17,047

163

17,210

Payables, accruals and provisions

1,549

(31)

1,518

Other financial liabilities—current

138

Provisions and other non-current liabilities

1,268

(14)

1,254

Other financial liabilities—non-current

154

233

Total liabilities

7,821

152

7,973

Retained earnings

4,755

4,766

Leases

Leases

For periods beginning from January 1, 2019:

Lessee

Right-of-use assets are measured on a number of factors including:

^●

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 payments over the lease term, which may include:

^●

Fixed payments (including in-substance fixed payments), less any lease incentives receivable;

^●

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.

Lessor

Business Description and Basis of Preparation (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Lease Liabilities Recognized in the Consolidated Statement Financial Position

January 1,

2019

Operating lease commitments at December 31, 2018

329

Leases beginning after January 1, 2019

(65)

Operating lease commitments subject to IFRS 16

264

Discounted at 4.1%, the weighted-average incremental borrowing rate at January 1, 2019

(26)

Exemption for short-term leases

(41)

Lease liabilities at January 1, 2019

197

Summary of Impacts on the consolidated statement of financial position

The following table sets forth the adoption impacts on the consolidated statement of financial position at January 1, 2019:

December 31,

January 1,

2018 As

IFRS 16 Adoption

2019

Reported

Adjustment

Opening Balance

Other financial assets—current

Prepaid expenses and other current assets

434

(5)

429

Computer hardware and other property, net

473

128

601

Other financial assets—non-current

Total assets

17,047

163

17,210

Payables, accruals and provisions

1,549

(31)

1,518

Other financial liabilities—current

138

Provisions and other non-current liabilities

1,268

(14)

1,254

Other financial liabilities—non-current

154

233

Total liabilities

7,821

152

7,973

Retained earnings

4,755

4,766

Revenues (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Revenues by Type and Geography

The following tables disaggregate revenues by type and geography and reconcile them to reportable segments for the three and six months ended June 30, 2019 and 2018 (see note 3).



Revenues by type	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Three months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
Recurring		555		539		269		243		147		139		144		63		-		-		1,115		984
Transactions		48		54		49		53		35		37		12		9		-		-		144		153
Global Print		-		-		-		-		-		-		-		-		164		174		164		174
Eliminations		-		-		-		-		-		-		-		-		-		-		-		-
Total		603		593		318		296		182		176		156		72		164		174		1,423		1,311



Revenues by type	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Six months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
Recurring		1,105		1,072		538		486		320		306		287		125		-		-		2,250		1,989
Transactions		92		106		132		139		84		87		24		19		-		-		332		351
Global Print		-		-		-		-		-		-		-		-		329		351		329		351
Eliminations		-		-		-		-		-		-		-		-		-		-		(1)		(1)
Total		1,197		1,178		670		625		404		393		311		144		329		351		2,910		2,690



Revenues by geography (country of destination)	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Three months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
U.S.		492		485		257		232		143		138		103		19		116		122		1,111		996
Canada (country of domicile)		12		11		3		2		8		8		-		-		20		21		43		42
Other		6		5		14		18		20		19		4		2		7		6		51		50
Americas (North America, Latin America, South America)		510		501		274		252		171		165		107		21		143		149		1,205		1,088

U.K.		49		54		30		27		7		7		7		7		9		13		102		108
Other		18		16		6		10		-		-		28		29		4		3		56		58
EMEA (Europe, Middle East and Africa)		67		70		36		37		7		7		35		36		13		16		158		166
Asia Pacific		26		22		8		7		4		4		14		15		8		9		60		57
Eliminations		-		-		-		-		-		-		-		-		-		-		-		-
Total		603		593		318		296		182		176		156		72		164		174		1,423		1,311



Revenues by geography (country of destination)	Legal Professionals				Corporates				Tax & Accounting Professionals				Reuters News				Global Print				Total

Six months ended June 30,	2019		2018		2019		2018		2019		2018		2019		2018		2019		2018		2019		2018
U.S.		979		961		546		500		328		316		206		37		236		247		2,295		2,061
Canada (country of domicile)		22		21		6		5		17		17		1		1		38		40		84		84
Other		13		12		30		34		41		41		5		4		11		15		100		106
Americas (North America, Latin America, South America)		1,014		994		582		539		386		374		212		42		285		302		2,479		2,251

U.K.		100		107		53		52		11		11		13		14		19		25		196		209
Other		31		32		19		20		-		-		56		58		8		6		114		116
EMEA (Europe, Middle East and Africa)		131		139		72		72		11		11		69		72		27		31		310		325
Asia Pacific		52		45		16		14		7		8		30		30		17		18		122		115
Eliminations		-		-		-		-		-		-		-		-		-		-		(1)		(1)
Total		1,197		1,178		670		625		404		393		311		144		329		351		2,910		2,690

Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Revenues and Adjusted EBITDA by Segment



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Revenues
Legal Professionals		603		593		1,197		1,178
Corporates		318		296		670		625
Tax & Accounting Professionals		182		176		404		393
Reuters News		156		72		311		144
Global Print		164		174		329		351
Eliminations		-		-		(1)		(1)
Consolidated revenues		1,423		1,311		2,910		2,690

Adjusted EBITDA
Legal Professionals		232		198		459		389
Corporates		102		95		220		206
Tax & Accounting Professionals		60		41		153		121
Reuters News		10		8		26		16
Global Print		73		76		147		157
Corporate costs		(122)		(70)		(253)		(111)
Adjusted EBITDA		355		348		752		778
Fair value adjustments (see note 5)		(2)		(1)		(3)		(4)
Depreciation		(38)		(29)		(72)		(59)
Amortization of computer software		(104)		(100)		(209)		(198)
Amortization of other identifiable intangible assets		(25)		(28)		(52)		(57)
Other operating gains, net		261		14		305		12
Consolidated operating profit		447		204		721		472
Net interest expense		(37)		(81)		(72)		(159)
Other finance (costs) income		(18)		14		(29)		21
Share of post-tax (losses) earnings in equity method investments		(126)		2		(223)		4
Tax (expense) benefit		(50)		3		(55)		(24)
Earnings from continuing operations		216		142		342		314

Operating Expenses (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Components of Operating Expenses

The components of operating expenses include the following:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Salaries, commissions and allowances		609		592		1,231		1,178
Share-based payments		15		14		27		23
Post-employment benefits		34		34		68		72
Total staff costs		658		640		1,326		1,273
Goods and services⁽¹⁾		313		229		645		463
Data		66		59		129		112
Telecommunications		13		9		23		14
Real estate		18		26		35		50
Fair value adjustments⁽²⁾		2		1		3		4
Total operating expenses		1,070		964		2,161		1,916

(1)	Goods and services include professional fees, consulting and outsourcing services, contractors, selling and marketing, and other general and administrative costs.

(2)	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)

6 Months Ended

Jun. 30, 2019

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:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Interest expense:
Debt		39		74		77		144
Derivative financial instruments - hedging activities		-		2		1		3
Other, net		5		1		9		2
Fair value losses on financial instruments:
Cash flow hedges, transfer from equity		(10)		28		(19)		68
Net foreign exchange losses (gains) on debt		10		(28)		19		(68)
Net interest expense - debt and other		44		77		87		149
Interest expense - leases⁽¹⁾		1		-		3		-
Net interest expense - pension and other post-employment benefit plans		7		7		13		14
Interest income		(15)		(3)		(31)		(4)
Net interest expense		37		81		72		159

(1)	Relates to the 2019 adoption of IFRS 16. See note 1.

Components of Finance Costs, Net, Include Other Finance Costs (Income)



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Net losses (gains) due to changes in foreign currency exchange rates		18		(5)		29		(18)
Net gains on derivative instruments		-		(9)		-		(3)
Other finance costs (income)		18		(14)		29		(21)

Equity Method Investments (Tables)

6 Months Ended

Jun. 30, 2019

Investments accounted for using equity method [abstract]

Share of Post-tax (Losses) in Equity Method Investments Reported in Consolidated Income Statement

The Company’s share of post-tax (losses) earnings in equity method investments as reported in the consolidated income statement is comprised of the following:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Refinitiv (45% ownership interest)		(129)		-		(231)		-
Other equity method investments		3		2		8		4
Total share of post-tax (losses) earnings in equity method investments		(126)		2		(223)		4

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:



	June 30,		December 31,

	2019		2018
Refinitiv (45% ownership interest)		1,805		2,052
Other equity method investments		164		155
Total equity method investments		1,969		2,207

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.



	Three months ended June 30,		Six months ended June 30,

	2019		2019
Revenues		1,550		3,117

Net loss		(267)		(477)
Remove: Net earnings attributable to non-controlling interests		(11)		(29)
Net loss attributable to Refinitiv		(278)		(506)
Other comprehensive income (loss) attributable to Refinitiv		46		(31)
Total comprehensive loss attributable to Refinitiv		(232)		(537)



	June 30,		December 31,

	2019		2018
Assets
Current assets		2,168		2,284
Non-current assets		21,007		20,978
Total assets		23,175		23,262
Liabilities
Current liabilities		1,880		1,842
Non-current liabilities		14,258		13,966
Total liabilities		16,138		15,808
Net assets		7,037		7,454
Non-controlling interests		(2,014)		(1,924)
Preference shares and other excluded items		(1,013)		(971)
Net assets attributable to Refinitiv		4,010		4,559

Net assets attributable to Refinitiv - beginning period		4,559		5,218
Net loss attributable to Refinitiv		(506)		(487)
Other comprehensive loss attributable to Refinitiv		(31)		(172)
Other adjustments⁽¹⁾		(12)		-
Net assets attributable to Refinitiv - ending period		4,010		4,559
Thomson Reuters % share		45%		45%
Thomson Reuters carrying amount		1,805		2,052

(1)	Relates to an adjustment associated with the audit of Refinitiv’s 2018 annual financial statements.

Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Earnings from Discontinued Operations

(Loss) earnings from discontinued operations are summarized as follows:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Revenues		-		1,553		-		3,136
Expenses		(27)		(1,022)		(37)		(2,220)
(Loss) earnings from discontinued operations before income tax		(27)		531		(37)		916
Tax expense⁽¹⁾		-		(16)		-		(884)
(Loss) earnings from discontinued operations, net of tax		(27)		515		(37)		32

(1)

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Text block [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:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018
Earnings attributable to common shareholders		189		625		305		286
Less: Dividends declared on preference shares		(1)		-		(2)		(1)
Earnings used in consolidated earnings per share		188		625		303		285
Less: Loss (earnings) from discontinued operations, net of tax		27		(515)		37		(32)
Remove: Non-controlling interests from discontinued operations		-		32		-		60
Earnings used in earnings per share from continuing operations		215		142		340		313

Weighted Average Common Shares

Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

Weighted-average number of common shares outstanding

500,705,054

708,974,582

501,035,457

709,448,598

Weighted-average number of vested DSUs

526,158

699,588

522,677

767,352

Basic

501,231,212

709,674,170

501,558,134

710,215,950

Effect of stock options and TRSUs

1,809,524

421,224

1,594,354

581,482

Diluted

503,040,736

710,095,394

503,152,488

710,797,432

Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Financial Assets and Liabilities

Financial assets and liabilities

Financial assets and liabilities in the consolidated statement of financial position are as follows:

June 30, 2019

Assets/

(Liabilities) at
Amortized
Cost

Assets/

(Liabilities)
at Fair
Value
through
Earnings

Assets at Fair
Value through
Other
Comprehensive
Income

Derivatives
Used for
Hedging

Total

Cash and cash equivalents

1,221

887

2,108

Trade and other receivables

1,178

Other financial assets - current

Other financial assets - non-current

291

363

Trade payables (see note 14)

(191)

Accruals (see note 14)

(570)

Other financial liabilities - current⁽¹⁾

(92)

Long-term indebtedness

(3,233)

Other financial liabilities - non current⁽²⁾

(169)

(1)

(62)

(232)

Total

(1,760)

1,177

(62)

(621)

(1)	Includes lease liabilities of $49 million recognized in 2019 due to the adoption of IFRS 16. See note 1.

(2)	Includes lease liabilities of $168 million recognized in 2019 due to the adoption of IFRS 16. See note 1.

December 31, 2018

Assets/

(Liabilities) at
Amortized
Cost

Assets/

(Liabilities)
at Fair
Value
through
Earnings

Assets at Fair
Value through
Other
Comprehensive
Income

Derivatives
Used for
Hedging

Total

Cash and cash equivalents

316

2,390

2,706

Trade and other receivables

1,313

Other financial assets - current

Other financial assets - non-current

Current indebtedness

(3)

Trade payables (see note 14)

(326)

Accruals (see note 14)

(854)

Other financial liabilities - current

(95)

Long-term indebtedness

(3,213)

Other financial liabilities - non current

(1)

(2)

(76)

(79)

Total

(2,774)

2,405

(76)

(422)

Summary of Debt and Related Derivative Instruments

The following is a summary of debt and related derivative instruments that hedge the cash flows of debt:

Carrying Amount

Fair Value

June 30, 2019

Primary Debt
Instruments

Derivative
Instruments
Liability

Primary Debt
Instruments

Derivative
Instruments
Liability

C$550, 3.309% Notes, due 2021

420

432

$350, 3.95% Notes, due 2021⁽¹⁾

138

142

$600, 4.30% Notes, due 2023

596

637

$450, 3.85% Notes, due 2024⁽¹⁾

241

250

$500, 3.35% Notes, due 2026

496

502

$350, 4.50% Notes, due 2043⁽¹⁾

116

$350, 5.65% Notes, due 2043

341

393

$400, 5.50% Debentures, due 2035

395

439

$500, 5.85% Debentures, due 2040

490

577

Total

3,233

3,488

Long-term

3,233


	Carrying Amount				Fair Value
December 31, 2018	Primary Debt Instruments		Derivative Instruments Liability		Primary Debt Instruments		Derivative Instruments Liability
Bank and other		3		-		3		-
C$550, 3.309% Notes, due 2021		402		76		407		76
$350, 3.95% Notes, due 2021⁽¹⁾		138		-		139		-
$600, 4.30% Notes, due 2023		596		-		607		-
$450, 3.85% Notes, due 2024⁽¹⁾		240		-		233		-
$500, 3.35% Notes, due 2026		495		-		458		-
$350, 4.50% Notes, due 2043⁽¹⁾		116		-		105		-
$350, 5.65% Notes, due 2043		341		-		364		-
$400, 5.50% Debentures, due 2035		395		-		406		-
$500, 5.85% Debentures, due 2040		490		-		524		-
Total		3,216		76		3,246		76
Current portion		3		-
Long-term portion		3,213		76

(1)	Notes were partially redeemed in October 2018.

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:

June 30, 2019

Total

Assets

Level 1

Level 2

Level 3

Balance

Money market accounts

887

Warrants⁽¹⁾

291

Financial assets at fair value through earnings

887

291

1,178

Financial assets at fair value through other comprehensive income⁽²⁾

Total assets

907

291

1,202

Liabilities

Contingent consideration⁽³⁾

(1)

Financial liabilities at fair value through earnings

(1)

Derivatives used for hedging⁽⁴⁾

(62)

Total liabilities

(62)

(1)

(63)



December 31, 2018				Total

Assets	Level 1	Level 2	Level 3		Balance

Money market accounts	-	2,390	-		2,390

Warrants⁽¹⁾	-	-	16		16

Embedded derivatives⁽⁵⁾	-	1	-		1

Financial assets at fair value through earnings	-	2,391	16		2,407

Financial assets at fair value through other comprehensive income⁽²⁾	2	21	-		23

Total assets	2	2,412	16		2,430

Liabilities

Contingent consideration⁽³⁾	-	-	(2)		(2)

Financial liabilities at fair value through earnings	-	-	(2)		(2)

Derivatives used for hedging⁽⁴⁾	-	(76)	-		(76)

Total liabilities	-	(76)	(2)		(78)

(1)	Warrants related to the Company’s equity method investment in Refinitiv (see note 8).

(2)	Investments in entities over which the Company does not have control, joint control or significant influence.

(3)	Obligations to pay additional consideration for prior acquisitions, based upon performance measures contractually agreed at the time of purchase.

(4)	Comprised of fixed-to-fixed cross-currency swaps on indebtedness.

(5)	Largely related to U.S. dollar pricing of customer agreements by subsidiaries outside of the U.S.

Schedule of Changes in Refinitv Warrants Level 3 Fair Value Measurement

The following reflects the change in Refinitiv warrants level 3 fair value measurement for the six months ended June 30, 2019:



	Six months ended June 30, 2019
December 31, 2018		16
Gain recognized within other operating gains, net		275
June 30, 2019		291

Other Non-Current Assets (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Other Non-Current Assets



	June 30,		December 31,

	2019		2018

Net defined benefit plan surpluses⁽¹⁾		79		7

Cash surrender value of life insurance policies		313		300

Deferred commissions		74		82

Other non-current assets		62		57

Total other non-current assets		528		446

(1)	The funded status of the defined benefit pension plan covering U.K. employees changed from a net obligation to a net surplus as the Company contributed $167 million to the plan in February 2019. See note 15.

Payables, Accruals and Provisions (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Schedule of Payables, Accruals and Provisions



	June 30,		December 31,

	2019		2018

Trade payables		191		326

Accruals		570		854

Provisions		183		203

Other current liabilities		119		166

Total payables, accruals and provisions		1,063		1,549

Provisions and Other Non-Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Provisions and Other Non-Current Liabilities



	June 30,		December 31,

	2019		2018

Net defined benefit plan obligations⁽¹⁾		655		708

Deferred compensation and employee incentives		140		128

Provisions		115		128

Uncertain tax positions		230		223

Other non-current liabilities		38		81

Total provisions and other non-current liabilities		1,178		1,268

(1)	The funded status of the defined benefit pension plan covering U.K. employees changed from a net obligation to a net surplus as the Company contributed $167 million to the plan in February 2019. See note 13.

Capital (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Details of Share Repurchases



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018

Share repurchases (millions of U.S. dollars)		-		359		190		359

Shares repurchased (number in millions)		-		9.1		3.5		9.1

Share repurchases – average price per share in U.S. dollars		-	$	39.54	$	53.93	$	39.54

Summary of dividend declared and paid

Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

Dividends declared per common share

$0.360

$0.345

$0.72

$0.69

Dividends declared

180

245

361

490

Dividends reinvested

(5)

(6)

(12)

(15)

Dividends paid

175

239

349

475

Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2019

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:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018

Non-cash employee benefit charges		39		40		81		76

Net losses (gains) on foreign exchange and derivative financial instruments		18		(12)		28		(17)

Share of post-tax losses (earnings) in equity method investments		126		(2)		223		(4)

Warrants (see note 12)		(256)		-		(275)		-

Other		(4)		(15)		(4)		3

		(77)		11		53		58

Details of Changes in Working Capital and Other Items

Details of “Changes in working capital and other items” are as follows:



	Three months ended June 30,				Six months ended June 30,

	2019		2018		2019		2018

Trade and other receivables		(47)		(30)		96		61

Prepaid expenses and other current assets		23		18		49		19

Other financial assets		(2)		6		33		41

Payables, accruals and provisions		(143)		(24)		(396)		(196)

Deferred revenue		98		99		28		45

Other financial liabilities		-		(11)		(33)		(46)

Income taxes		10		18		10		(2)

Other		(33)		(4)		(49)		(22)

		(94)		72		(262)		(100)

Details of Income Taxes Paid

Details of income taxes paid are as follows:

Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

Operating activities – continuing operations

(49)

(8)

(114)

(43)

Operating activities – discontinued operations

(12)

(25)

(54)

(52)

Investing activities – continuing operations

(1)

Total income taxes paid

(62)

(33)

(169)

(95)

Related Party Transactions (Tables)

6 Months Ended

Jun. 30, 2019

Text block [abstract]

Summary of Expense or Contra-Expense

For the six months ended June 30, 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)
Transitional services		17		(35)
Properties leased		18		(19)

Business Description and Basis of Preparation - Additional Information (Detail) - USD ($) $ in Millions		6 Months Ended
	Oct. 01, 2018	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure of business description and basis of presentation [line items]
Adjustment to opening balance of retained earnings		$ 4,577	$ 4,766	$ 4,755
Assets		16,453	17,210	17,047
Right of use Assets			128
Expected future minimum sublease payments receivable under non-cancellable subleases, classified as operating lease			40
Liabilities		$ 7,355	7,973	$ 7,821
Lease Liabilities			197
Financial & risk [member]
Disclosure of business description and basis of presentation [line items]
Percentage of ownership sold	55.00%
Refinitiv [member]
Disclosure of business description and basis of presentation [line items]
Percentage of ownership held		45.00%
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
Assets			163
Liabilities			$ 152

Business Description and Basis of Preparation - Summary of Lease Liabilities Recognized in the Consolidated Statement Financial Position (Detail) - USD ($) $ in Millions	Jan. 01, 2019	Dec. 31, 2018
Disclosure Of Leases [Line items]
Operating lease commitments		$ 329
Discounted at 4.1%, the weighted-average incremental borrowing rate at January 1, 2019	$ (26)
Exemption for short-term leases	(41)
Lease Liabilities	197
Adjust Total Commitment to Commitment Subject to IFRS 16 [member]
Disclosure Of Leases [Line items]
Operating lease commitments	(65)
Commitment Subject to IFRS 16 [member]
Disclosure Of Leases [Line items]
Operating lease commitments	$ 264

Business Description and Basis of Preparation - Summary of Lease Liabilities Recognized in the Consolidated Statement Financial Position (Parenthetical) (Detail)	Jan. 01, 2019
Presentation of leases for lessee [abstract]
Weighted average discounted rate	4.10%

Business Description and Basis of Preparation - Summary of Impacts on Consolidated Statement of Financial Position (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure of initial application of standards or interpretations [line items]
Other financial assets-current	$ 48	$ 82	$ 76
Prepaid expenses and other current assets	527	429	434
Computer hardware and other property, net	470	601	473
Other financial assets-non-current	363	87	53
Total assets	16,453	17,210	17,047
Payables, accruals and provisions	1,063	1,518	1,549
Other financial liabilities-current	92	138	95
Provisions and other non-current liabilities	1,178	1,254	1,268
Other financial liabilities-non-current	232	233	79
Total liabilities	7,355	7,973	7,821
Retained earnings	$ 4,577	4,766	$ 4,755
Adjustments Due to Adoption of IFRS 16 [member]
Disclosure of initial application of standards or interpretations [line items]
Other financial assets-current		6
Prepaid expenses and other current assets		(5)
Computer hardware and other property, net		128
Other financial assets-non-current		34
Total assets		163
Payables, accruals and provisions		(31)
Other financial liabilities-current		43
Provisions and other non-current liabilities		(14)
Other financial liabilities-non-current		154
Total liabilities		152
Retained earnings		$ 11

Revenues - Summary of Revenues by Type (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ 1,423	$ 1,311	$ 2,910	$ 2,690
Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	1,115	984	2,250	1,989
Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	144	153	332	351
Global Print [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	164	174	329	351
Eliminations [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue			(1)	(1)
Legal Professionals [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	603	593	1,197	1,178
Legal Professionals [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	555	539	1,105	1,072
Legal Professionals [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	48	54	92	106
Corporates [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	318	296	670	625
Corporates [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	269	243	538	486
Corporates [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	49	53	132	139
Tax & Accounting Professionals [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	182	176	404	393
Tax & Accounting Professionals [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	147	139	320	306
Tax & Accounting Professionals [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	35	37	84	87
Reuters News [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	156	72	311	144
Reuters News [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	144	63	287	125
Reuters News [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	12	9	24	19
Global Print [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	164	174	329	351
Global Print [member] \| Global Print [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ 164	$ 174	$ 329	$ 351

Revenues - Summary of geographical information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of geographical areas [line items]
Revenue	$ 1,423	$ 1,311	$ 2,910	$ 2,690
U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1,111	996	2,295	2,061
Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	43	42	84	84
Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	51	50	100	106
Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1,205	1,088	2,479	2,251
U.K. [Member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	102	108	196	209
Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	56	58	114	116
EMEA [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	158	166	310	325
Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	60	57	122	115
Eliminations [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue			(1)	(1)
Legal Professionals [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	603	593	1,197	1,178
Legal Professionals [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	492	485	979	961
Legal Professionals [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	12	11	22	21
Legal Professionals [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	6	5	13	12
Legal Professionals [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	510	501	1,014	994
Legal Professionals [member] \| U.K. [Member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	49	54	100	107
Legal Professionals [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	18	16	31	32
Legal Professionals [member] \| EMEA [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	67	70	131	139
Legal Professionals [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	26	22	52	45
Corporates [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	318	296	670	625
Corporates [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	257	232	546	500
Corporates [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	3	2	6	5
Corporates [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	14	18	30	34
Corporates [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	274	252	582	539
Corporates [member] \| U.K. [Member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	30	27	53	52
Corporates [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	6	10	19	20
Corporates [member] \| EMEA [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	36	37	72	72
Corporates [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	8	7	16	14
Tax & Accounting Professionals [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	182	176	404	393
Tax & Accounting Professionals [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	143	138	328	316
Tax & Accounting Professionals [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	8	8	17	17
Tax & Accounting Professionals [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	20	19	41	41
Tax & Accounting Professionals [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	171	165	386	374
Tax & Accounting Professionals [member] \| U.K. [Member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	7	7	11	11
Tax & Accounting Professionals [member] \| EMEA [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	7	7	11	11
Tax & Accounting Professionals [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	4	4	7	8
Reuters News [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	156	72	311	144
Reuters News [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	103	19	206	37
Reuters News [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue			1	1
Reuters News [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	4	2	5	4
Reuters News [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	107	21	212	42
Reuters News [member] \| U.K. [Member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	7	7	13	14
Reuters News [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	28	29	56	58
Reuters News [member] \| EMEA [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	35	36	69	72
Reuters News [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	14	15	30	30
Global Print [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	164	174	329	351
Global Print [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	116	122	236	247
Global Print [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	20	21	38	40
Global Print [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	7	6	11	15
Global Print [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	143	149	285	302
Global Print [member] \| U.K. [Member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	9	13	19	25
Global Print [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	4	3	8	6
Global Print [member] \| EMEA [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	13	16	27	31
Global Print [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	$ 8	$ 9	$ 17	$ 18

Segment Information - Summary of Operating Results of Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of operating segments [Line Items]
Revenues	$ 1,423	$ 1,311	$ 2,910	$ 2,690
Adjusted EBITDA	355	348	752	778
Fair value adjustments (see note 5)	(2)	(1)	(3)	(4)
Depreciation	(38)	(29)	(72)	(59)
Other operating gains, net	261	14	305	12
Operating profit	447	204	721	472
Net interest expense	(37)	(81)	(72)	(159)
Other finance (costs) income	(18)	14	(29)	21
Share of post-tax (losses) earnings in equity method investments	(126)	2	(223)	4
Tax (expense) benefit	(50)	3	(55)	(24)
Earnings from continuing operations	216	142	342	314
Operating segments [member] \| Legal Professionals [member]
Disclosure of operating segments [Line Items]
Revenues	603	593	1,197	1,178
Adjusted EBITDA	232	198	459	389
Operating segments [member] \| Corporates [member]
Disclosure of operating segments [Line Items]
Revenues	318	296	670	625
Adjusted EBITDA	102	95	220	206
Operating segments [member] \| Tax & Accounting Professionals [member]
Disclosure of operating segments [Line Items]
Revenues	182	176	404	393
Adjusted EBITDA	60	41	153	121
Operating segments [member] \| Reuters News [member]
Disclosure of operating segments [Line Items]
Revenues	156	72	311	144
Adjusted EBITDA	10	8	26	16
Operating segments [member] \| Global Print [member]
Disclosure of operating segments [Line Items]
Revenues	164	174	329	351
Adjusted EBITDA	73	76	147	157
Operating segments [member] \| Eliminations [member]
Disclosure of operating segments [Line Items]
Revenues			(1)	(1)
Corporate costs [member]
Disclosure of operating segments [Line Items]
Adjusted EBITDA	(122)	(70)	(253)	(111)
Computer software [member]
Disclosure of operating segments [Line Items]
Amortization	(104)	(100)	(209)	(198)
Other identifiable intangible assets [member]
Disclosure of operating segments [Line Items]
Amortization	$ (25)	$ (28)	$ (52)	$ (57)

Operating Expenses - Components of Operating Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Expenses 1 [abstract]
Salaries, commissions and allowances	$ 609	$ 592	$ 1,231	$ 1,178
Share-based payments	15	14	27	23
Post-employment benefits	34	34	68	72
Total staff costs	658	640	1,326	1,273
Goods and services	313	229	645	463
Data	66	59	129	112
Telecommunications	13	9	23	14
Real estate	18	26	35	50
Fair value adjustments	2	1	3	4
Total operating expenses	$ 1,070	$ 964	$ 2,161	$ 1,916

Other Operating Gains Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Operating Income [abstract]
Other operating (losses) gains, net	$ 261	$ 14	$ 305	$ 12
Revaluation of warrants	$ 256		$ 275

Finance Costs, Net - Components of Finance Costs, Net, Include Interest Expense (Income) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest expense:
Debt	$ 39	$ 74	$ 77	$ 144
Derivative financial instruments - hedging activities		2	1	3
Other, net	5	1	9	2
Fair value losses on financial instruments:
Cash flow hedges, transfer from equity	(10)	28	(19)	68
Net foreign exchange losses (gains) on debt	10	(28)	19	(68)
Net interest expense - debt and other	44	77	87	149
Interest expense - leases	1		3
Net interest expense - pension and other post-employment benefit plans	7	7	13	14
Interest income	(15)	(3)	(31)	(4)
Net interest expense	$ 37	$ 81	$ 72	$ 159

Finance Costs, Net - Components of Finance Costs, Net, Include Other Finance Costs (Income) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Material income and expense [abstract]
Net losses (gains) due to changes in foreign currency exchange rates	$ 18	$ (5)	$ 29	$ (18)
Net gains on derivative instruments		(9)		(3)
Other finance costs (income)	$ 18	$ (14)	$ 29	$ (21)

Equity Method Investments - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019
Refinitiv [member]
Disclosure of associates [line items]
Percentage of ownership held	45.00%

Equity Method Investments - Share of Post-tax (Losses) in Equity Method Investments Reported in Consolidated Income Statement (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of associates [line items]
Total share of post-tax(losses) earnings in equity method investment	$ (126)	$ 2	$ (223)	$ 4
Refinitiv [member]
Disclosure of associates [line items]
Total share of post-tax(losses) earnings in equity method investment	(129)		(231)
Other equity method investments [member]
Disclosure of associates [line items]
Total share of post-tax(losses) earnings in equity method investment	$ 3	$ 2	$ 8	$ 4

Equity Method Investments - Share of Post-tax (Losses) in Equity Method Investments Reported in Consolidated Income Statement (Parenthetical) (Detail)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Refinitiv [member]
Disclosure of associates [line items]
Percentage of voting equity interests acquired	45.00%	45.00%	45.00%

Equity Method Investments - Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of associates [line items]
Total equity method investments	$ 1,969	$ 2,207
Refinitiv [member]
Disclosure of associates [line items]
Total equity method investments	1,805	2,052
Other equity method investments [member]
Disclosure of associates [line items]
Total equity method investments	$ 164	$ 155

Equity Method Investments - Summary of Equity Method Investments Reported in Consolidated Statement of Financial Position (Parenthetical) (Detail)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Refinitiv [member]
Disclosure of associates [line items]
Percentage of voting equity interests acquired	45.00%	45.00%	45.00%

Equity Method Investments - Summary of Financial Information for Refinitiv with Reconciliation to Thomson Reuters Carrying Value of its Investment (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Jan. 01, 2019
Assets
Current assets	$ 3,861	$ 4,529		$ 3,861		$ 4,529
Total assets	16,453	17,047		16,453		17,047	$ 17,210
Revenues	1,423		$ 1,311	2,910	$ 2,690
Liabilities
Current liabilities	2,000	2,462		2,000		2,462
Total liabilities	7,355	7,821		7,355		7,821	$ 7,973
Net earnings (loss)	189		657	305	346
Net earnings attributable to non-controlling interests			32		60
Net loss attributable to Refinitiv	189		$ 625	305	$ 286
Thomson Reuters carrying amount	1,969	2,207		1,969		2,207
Refinitiv [member]
Assets
Current assets	2,168	2,284		2,168		2,284
Non-current assets	21,007	20,978		21,007		20,978
Total assets	23,175	23,262		23,175		23,262
Revenues	1,550			3,117
Liabilities
Current liabilities	1,880	1,842		1,880		1,842
Non-current liabilities	14,258	13,966		14,258		13,966
Total liabilities	16,138	15,808		16,138		15,808
Net earnings (loss)	(267)			(477)
Net assets	7,037	7,454		7,037		7,454
Net earnings attributable to non-controlling interests	(11)			(29)
Non-controlling interests	(2,014)	(1,924)		(2,014)		(1,924)
Preference shares and other excluded items	(1,013)	(971)		(1,013)		(971)
Net assets attributable to Refinitiv, Beginning balance		5,218		4,559
Net loss attributable to Refinitiv	(278)	(487)		(506)
Other comprehensive income (loss) attributable to Refinitiv	46	(172)		(31)
Other adjustments				(12)
Total comprehensive loss attributable to Refinitiv	(232)			(537)
Net assets attributable to Refinitiv, Ending balance	$ 4,010	4,559		$ 4,010		$ 4,559
Thomson Reuters % share	45.00%			45.00%		45.00%
Thomson Reuters carrying amount	$ 1,805	$ 2,052		$ 1,805		$ 2,052

Taxation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of income taxes [abstract]
Tax (expense) benefit	$ 50	$ (3)	$ 55	$ 24

- Definition

The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

+ References + Details

Discontinued Operations - Additional Information (Detail)		6 Months Ended
	Oct. 01, 2018	Jun. 30, 2019
Financial & risk [member]
Income loss from continuing and discontinued operations [line items]
Percentage of ownership stake sold	55.00%
Refinitiv [member]
Income loss from continuing and discontinued operations [line items]
Percentage of ownership stake retained		45.00%

Discontinued Operations - Summary of Earnings from Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income loss from continuing and discontinued operations [line items]
Revenues	$ 1,423	$ 1,311	$ 2,910	$ 2,690
(Loss) earnings from discontinued operations, net of tax	(27)	515	(37)	32
Discontinued operations [member]
Income loss from continuing and discontinued operations [line items]
Revenues		1,553		3,136
Expenses	(27)	(1,022)	(37)	(2,220)
(Loss) earnings from discontinued operations before income tax	(27)	531	(37)	916
Tax expense		(16)		(884)
(Loss) earnings from discontinued operations, net of tax	$ (27)	$ 515	$ (37)	$ 32

- Definition

The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2018-01-01
-Paragraph 28
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_28_a&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2018-01-01
-Paragraph 23
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23_a&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2018-01-01
-Paragraph 32
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_32&doctype=Standard
-URIDate 2018-03-16

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2018-01-01
-Paragraph 33
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_33_a&doctype=Standard
-URIDate 2018-03-16

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2018-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_34&doctype=Standard
-URIDate 2018-03-16

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 82
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_a&doctype=Standard
-URIDate 2018-03-16

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 103
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_103&doctype=Standard
-URIDate 2018-03-16

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 102
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_102&doctype=Standard
-URIDate 2018-03-16

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 5
-IssueDate 2018-01-01
-Paragraph 33
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=5&date=2018-03-01&anchor=para_33_b_i&doctype=Standard
-URIDate 2018-03-16

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph B12
-Subparagraph b
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B12_b_v&doctype=Appendix&seq=2
-URIDate 2018-03-16

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph B10
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B10_b&doctype=Appendix&seq=2
-URIDate 2018-03-16

+ Details

Discontinued Operations - Summary of Earnings from Discontinued Operations (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Discontinued operations [member]
Income loss from continuing and discontinued operations [line items]
Deferred tax (benefit) charge	$ (32)	$ 812

Earnings Per Share - Reconciliation of Earnings Used for Earnings per Share Calculations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings per share [abstract]
Common shareholders	$ 189	$ 625	$ 305	$ 286
Less: Dividends declared on preference shares	(1)		(2)	(1)
Earnings used in consolidated earnings per share	188	625	303	285
Less: Loss (earnings) from discontinued operations, net of tax	27	(515)	37	(32)
Remove: Non-controlling interests from discontinued operations		32		60
Earnings used in earnings per share from continuing operations	$ 215	$ 142	$ 340	$ 313

Earnings Per Share - Weighted Average Common Shares (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]
Weighted-average number of common shares outstanding	500,705,054	708,974,582	501,035,457	709,448,598
Weighted-average number of vested DSUs	526,158	699,588	522,677	767,352
Basic	501,231,212	709,674,170	501,558,134	710,215,950
Effect of stock options and TRSUs	1,809,524	421,224	1,594,354	581,482
Diluted	503,040,736	710,095,394	503,152,488	710,797,432

Financial Instruments - Summary of Financial Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Jun. 30, 2018
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	$ 2,108		$ 2,706	$ 879
Trade and other receivables	1,178		1,313
Other financial assets - current	48	$ 82	76
Other financial assets - non-current	363	87	53
Current indebtedness			(3)
Trade payables	(191)		(326)
Accruals	(570)		(854)
Other financial liabilities - current	(92)	(138)	(95)
Long-term indebtedness	(3,233)		(3,213)
Other financial liabilities - non current	(232)	$ (233)	(79)
Total	(621)		(422)
Assets/ (liabilities) at fair value through earnings [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	887		2,390
Other financial assets - current			1
Other financial assets - non-current	291		16
Other financial liabilities - non current	(1)		(2)
Total	1,177		2,405
Derivatives used for hedging [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Other financial liabilities - non current	(62)		(76)
Total	(62)		(76)
Assets liabilities at amortized cost [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	1,221		316
Trade and other receivables	1,178		1,313
Other financial assets - current	48		75
Other financial assets - non-current	48		14
Current indebtedness			(3)
Trade payables	(191)		(326)
Accruals	(570)		(854)
Other financial liabilities - current	(92)		(95)
Long-term indebtedness	(3,233)		(3,213)
Other financial liabilities - non current	(169)		(1)
Total	(1,760)		(2,774)
Assets at Fair Value through Other Comprehensive Income [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Other financial assets - non-current	24		23
Total	$ 24		$ 23

Financial Instruments - Summary of Financial Assets and Liabilities (Parenthetical) (Detail) $ in Millions	Jun. 30, 2019 USD ($)
Changes in fair value of credit derivative [abstract]
Current lease liabilities	$ 49
Non-current lease liabilities	$ 168

Financial Instruments - Additional Information (Detail) - USD ($)		6 Months Ended
	Aug. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [Line Items]
Restricted cash and cash equivalents		$ 34,000,000	$ 24,000,000
Commercial papers issued		0
Commercial paper [member]
Disclosure of detailed information about financial instruments [Line Items]
Commercial paper programs		2,000,000,000
Credit facility maturing in November 2021 [member]
Disclosure of detailed information about financial instruments [Line Items]
Gross loan commitments		$ 2,400,000,000
Maturity date		November 2021
Maximum gross loan commitment upon request		$ 3,000,000,000
Aggregate amount borrowing from lenders		$ 600,000,000
Credit facility maturing in November 2021 [member] \| London Interbank Offered Rate (LIBOR) [Member]
Disclosure of detailed information about financial instruments [Line Items]
Credit facility, rate of interest added to reference rate		1.10%
Refinitiv [member]
Disclosure of detailed information about financial instruments [Line Items]
Percentage of ownership held		45.00%
Major business combination [member] \| Refinitiv [member]
Disclosure of detailed information about financial instruments [Line Items]
Enterprise Value	$ 27,000,000,000
Major business combination [member] \| Refinitiv [member] \| Bottom of range [member]
Disclosure of detailed information about financial instruments [Line Items]
Percentage of ownership held	45.00%
Major business combination [member] \| Refinitiv [member] \| Top of range [member]
Disclosure of detailed information about financial instruments [Line Items]
Percentage of ownership held	47.60%

Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Current portion		$ 3
Long-term portion	$ 3,233	3,213
Derivative instrument liability	62	76
Derivative instrument liability, current portion		0
Derivative instrument liability, Long-term portion	62	76
At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	62	76
3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	62	76
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	76
Primary debt instruments [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	3,233	3,216
Current portion		3
Long-term portion	3,233	3,213
Primary debt instruments [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	3,488	3,246
Primary debt instruments [member] \| Bank and Other [Member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		3
Primary debt instruments [member] \| Bank and Other [Member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings		3
Primary debt instruments [member] \| 3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	420	402
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	432	407
Primary debt instruments [member] \| 3.95% Notes, Due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	138	138
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	142	139
Primary debt instruments [member] \| 4.30% notes, due 2023 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	596	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	637	607
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	250	233
Primary debt instruments [member] \| 3.35% notes, due 2026 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	496	495
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	502	458
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	116	105
Primary debt instruments [member] \| 5.65% notes, due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	341	341
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	393	364
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	439	406
Primary debt instruments [member] \| 5.85% debentures, due 2040 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	490	490
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	$ 577	$ 524

Financial Instruments - Summary of Debt and Related Derivative Instruments (Parenthetical) (Detail) $ in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2019 CAD ($)	Dec. 31, 2018 CAD ($)
3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount			$ 550	$ 550
Debt instrument, interest rate	3.309%	3.309%	3.309%	3.309%
Debt instrument, maturity year	2021	2021
Debt instrument, original currency	CAD	CAD
3.95% Notes, Due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 350	$ 350
Debt instrument, interest rate	3.95%	3.95%	3.95%	3.95%
Debt instrument, maturity year	2021	2021
Debt instrument, original currency	USD	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 - Summary of Fair Value Measurements Carried at Fair Value in the Consolidated Statement of Financial Position (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Assets
Money market accounts	$ 887	$ 2,390
Warrants	291	16
Embedded derivatives		1
Financial assets at fair value through earnings	1,178	2,407
Financial assets at fair value through other comprehensive income	24	23
Total assets	1,202	2,430
Liabilities
Contingent consideration	(1)	(2)
Financial liabilities at fair value through earnings	(1)	(2)
Derivatives used for hedging	(62)	(76)
Total liabilities	(63)	(78)
Level 1 [member]
Assets
Financial assets at fair value through other comprehensive income	4	2
Total assets	4	2
Level 2 [member]
Assets
Money market accounts	887	2,390
Embedded derivatives		1
Financial assets at fair value through earnings	887	2,391
Financial assets at fair value through other comprehensive income	20	21
Total assets	907	2,412
Liabilities
Derivatives used for hedging	(62)	(76)
Total liabilities	(62)	(76)
Level 3 [member]
Assets
Warrants	291	16
Financial assets at fair value through earnings	291	16
Total assets	291	16
Liabilities
Contingent consideration	(1)	(2)
Financial liabilities at fair value through earnings	(1)	(2)
Total liabilities	$ (1)	$ (2)

Financial Instruments - Schedule of Changes in Refinitv Warrants Level 3 Fair Value Measurement (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Disclosure of fair value measurement of assets [line items]
Beginning Balance	$ 16
Ending Balance	291
Level 3 [member]
Disclosure of fair value measurement of assets [line items]
Beginning Balance	16
Ending Balance	291
Level 3 [member] \| Warrants [member]
Disclosure of fair value measurement of assets [line items]
Beginning Balance	16
Gain recognized within other operating gains, net	275
Ending Balance	$ 291

Other Non-Current Assets - Summary of Other Non-Current Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Other Noncurrent Assets [abstract]
Net defined benefit plan surpluses	$ 79	$ 7
Cash surrender value of life insurance policies	313	300
Deferred commissions	74	82
Other non-current assets	62	57
Total other non-current assets	$ 528	$ 446

Other Non-Current Assets - Summary of Other Non-Current Assets (Parenthetical) (Detail) $ in Millions	1 Months Ended
	Feb. 28, 2019 USD ($)
U.K. [Member]
Disclosure Of Other Non-current Assets Table [line items]
Defined benefit pension plan, net surplus	$ 167

Payables, Accruals and Provisions - Schedule of Payables, Accruals and Provisions (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure Of Payables Accruals And Provisions [abstract]
Trade payables	$ 191		$ 326
Accruals	570		854
Provisions	183		203
Other current liabilities	119		166
Total payables, accruals and provisions	$ 1,063	$ 1,518	$ 1,549

Provisions and Other Non-Current Liabilities - Summary of Provisions and Other Non-Current Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure of other provisions [abstract]
Net defined benefit plan obligations	$ 655		$ 708
Deferred compensation and employee incentives	140		128
Provisions	115		128
Uncertain tax positions	230		223
Other non-current liabilities	38		81
Total provisions and other non-current liabilities	$ 1,178	$ 1,254	$ 1,268

Provisions and Other Non-Current Liabilities - Summary of Provisions and Other Non-Current Liabilities (Parenthetical) (Detail) $ in Millions	1 Months Ended
	Feb. 28, 2019 USD ($)
U.K. [Member]
Disclosure of other provisions [Line Items]
Defined benefit pension plan, net surplus	$ 167

Capital - Details of Share Repurchases (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of share repurchases [abstract]
Share repurchases	$ 359	$ 190	$ 359
Shares repurchased	9.1	3.5	9.1
Share repurchases - average price per share in U.S. dollars	$ 39.54	$ 53.93	$ 39.54

Capital - Summary of Dividend Declared and Paid (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of changes in unrealized fair value of available-for-sale investments [abstract]
Dividends declared per common share	$ 0.360	$ 0.345	$ 0.720	$ 0.690
Dividends declared	$ 180	$ 245	$ 361	$ 490
Dividends reinvested	(5)	(6)	(12)	(15)
Dividends paid	$ 175	$ 239	$ 349	$ 475

Supplemental Cash Flow Information - Details of Other in the Consolidated Statement of Cash Flow (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure Of Other In Consolidated Statement Of Cash Flow [abstract]
Non-cash employee benefit charges	$ 39	$ 40	$ 81	$ 76
Net losses (gains) on foreign exchange and derivative financial instruments	18	(12)	28	(17)
Share of post-tax losses (earnings) in equity method investments	126	(2)	223	(4)
Warrants	(256)		(275)
Other	(4)	(15)	(4)	3
Total	$ (77)	$ 11	$ 53	$ 58

Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure Of Changes In Working Capital And Other Items [abstract]
Trade and other receivables	$ (47)	$ (30)	$ 96	$ 61
Prepaid expenses and other current assets	23	18	49	19
Other financial assets	(2)	6	33	41
Payables, accruals and provisions	(143)	(24)	(396)	(196)
Deferred revenue	98	99	28	45
Other financial liabilities		(11)	(33)	(46)
Income taxes	10	18	10	(2)
Other	(33)	(4)	(49)	(22)
Total	$ (94)	$ 72	$ (262)	$ (100)

Supplemental Cash Flow Information - Details of Income Taxes (Paid) Received (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of income taxes [line items]
Operating activities	$ (49)	$ (8)	$ (114)	$ (43)
Investing activities	(1)		(1)
Total income taxes paid	(62)	(33)	(169)	(95)
Discontinued operations [member]
Disclosure of income taxes [line items]
Operating activities	$ (12)	$ (25)	$ (54)	$ (52)

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Oct. 01, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of transactions between related parties [Line Items]
Other operating gains, net		$ 261	$ 14	$ 305	$ 12
Financial & risk [member]
Disclosure of transactions between related parties [Line Items]
Percentage of sale of interest	55.00%
Refinitiv [member]
Disclosure of transactions between related parties [Line Items]
Total receivable from Refinitiv		268		268
Total payable to Refinitiv		$ 151		$ 151
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				$ 12
Refinitiv [member] \| news and editorial [member] \| Reuters News [member]
Disclosure of transactions between related parties [Line Items]
Agreement maturity period	30 years
Receipts for news and content	$ 325
Refinitiv [member] \| news and editorial [member] \| Reuters News [member] \| Bottom of range [member]
Disclosure of transactions between related parties [Line Items]
Revenue				$ 168

Related Party Transactions - Summary of Expense or Contra-Expense (Detail) - Refinitiv [member] $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Properties leased [member]
Disclosure of expenses [line items]
Provided by Thomson Reuters to Refinitiv Contra-expense	$ 18
Provided by Refinitiv to Thomson Reuters (Expense)	(19)
Transitional services [member]
Disclosure of expenses [line items]
Provided by Thomson Reuters to Refinitiv Contra-expense	17
Provided by Refinitiv to Thomson Reuters (Expense)	$ (35)

Subsequent Events - Additional information (Detail) - USD ($) $ in Billions		6 Months Ended
	Aug. 01, 2019	Jun. 30, 2019
Refinitiv [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Ownership interest		45.00%
Major business combination [member] \| LSEG [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Ownership interest of consortium	37.00%
Ownership interest	15.00%
Major business combination [member] \| Refinitiv [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Enterprise Value	$ 27