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Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 30, 2018 shares
Document - Document and Entity Information [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	TRI
Entity Registrant Name	THOMSON REUTERS CORP /CAN/
Entity Central Index Key	0001075124
Current Fiscal Year End Date	--06-30
Entity Common Stock, Shares Outstanding	0

Consolidated Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Consolidated Income Statement - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONTINUING OPERATIONS
Revenues	$ 1,311	$ 1,280	$ 2,690	$ 2,611
Operating expenses	(964)	(899)	(1,916)	(1,810)
Depreciation	(29)	(34)	(59)	(62)
Other operating gains (losses), net	14	(1)	12	12
Operating profit	204	218	472	492
Finance costs, net:
Net interest expense	(81)	(89)	(159)	(181)
Other finance income (costs)	14	(60)	21	(88)
Income before tax and equity method investments	137	69	334	223
Share of post-tax earnings (losses) in equity method investments	2	(7)	4	(5)
Tax benefit (expense)	3	(15)	(24)	(26)
Earnings from continuing operations	142	47	314	192
Earnings from discontinued operations, net of tax	515	159	32	328
Net earnings	657	206	346	520
Earnings attributable to:
Common shareholders	625	192	286	489
Non-controlling interests	$ 32	$ 14	$ 60	$ 31
Basic and diluted earnings (loss) per share:
From continuing operations	$ 0.20	$ 0.07	$ 0.44	$ 0.26
From discontinued operations	0.68	0.20	(0.04)	0.41
Basic and diluted earnings (loss) per share	$ 0.88	$ 0.27	$ 0.40	$ 0.67
Computer software [member]
CONTINUING OPERATIONS
Amortization	$ (100)	$ (93)	$ (198)	$ (189)
Other identifiable intangible assets [member]
CONTINUING OPERATIONS
Amortization	$ (28)	$ (35)	$ (57)	$ (70)

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net earnings	$ 657	$ 206	$ 346	$ 520
Items that have been or may be subsequently reclassified to net earnings:
Cash flow hedges adjustments to net earnings	28	(37)	68	(44)
Cash flow hedges adjustments to equity	(30)	22	(58)	31
Foreign currency translation adjustments to equity	(360)	251	(201)	384
Other comprehensive income that will be reclassified to profit or loss, net of tax	(362)	236	(191)	371
Items that will not be reclassified to net earnings:
Remeasurement on defined benefit pension plans	65	16	111	20
Related tax expense on remeasurement on defined benefit pension plans	(15)	(6)	(27)	(11)
Other comprehensive income that will not be reclassified to profit or loss, net of tax	50	10	84	9
Other comprehensive (loss) income	(312)	246	(107)	380
Total comprehensive income	345	452	239	900
Non-controlling interests
Total comprehensive income	345	452	239	900
Continuing operations [member]
Common shareholders:
Continuing operations	74	69	223	233
Discontinued operations [member]
Common shareholders:
Continuing operations	239	369	(44)	636
Non-controlling interests
Non-controlling interests - discontinued operations	$ 32	$ 14	$ 60	$ 31

Consolidated Statement of Financial Position - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Statement of financial position [abstract]
Cash and cash equivalents	$ 879	$ 874
Trade and other receivables	856	1,457
Other financial assets	48	98
Prepaid expenses and other current assets	380	548
Current assets excluding assets held for sale	2,163	2,977
Assets held for sale	14,445
Current assets	16,608	2,977
Computer hardware and other property, net	502	921
Computer software, net	910	1,458
Other identifiable intangible assets, net	3,298	5,315
Goodwill	4,984	15,042
Other financial assets	40	83
Other non-current assets	586	605
Deferred tax	47	79
Total assets	26,975	26,480
Liabilities
Current indebtedness	2,595	1,644
Payables, accruals and provisions	1,037	2,086
Deferred revenue	781	937
Other financial liabilities	1,106	129
Current liabilities excluding liabilities associated with assets held for sale	5,519	4,796
Liabilities associated with assets held for sale	1,657
Current liabilities	7,176	4,796
Long-term indebtedness	4,936	5,382
Provisions and other non-current liabilities	1,204	1,740
Other financial liabilities	211	279
Deferred tax	1,285	708
Total liabilities	14,812	12,905
Equity
Capital	9,132	9,549
Retained earnings	6,375	7,201
Accumulated other comprehensive loss	(3,864)	(3,673)
Total shareholders' equity	11,643	13,077
Non-controlling interests	520	498
Total equity	12,163	13,575
Total liabilities and equity	26,975	26,480
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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES
Earnings from continuing operations	$ 142	$ 47	$ 314	$ 192
Adjustments for:
Depreciation	29	34	59	62
Deferred tax	(30)	(16)	(25)	(12)
Other	11	151	58	211
Pension contribution				(500)
Changes in working capital and other items	72	46	(100)	(219)
Operating cash flows from continuing operations	352	390	561	(7)
Operating cash flows from discontinued operations	451	444	661	473
Net cash provided by operating activities	803	834	1,222	466
INVESTING ACTIVITIES
Acquisitions, net of cash acquired	(1)	(5)	(28)	(5)
Proceeds from disposals of businesses and investments				10
Capital expenditures	(131)	(124)	(310)	(232)
Proceeds from disposals of property and equipment	27		27
Other investing activities	18	9	18	15
Investing cash flows from continuing operations	(87)	(120)	(293)	(212)
Investing cash flows from discontinued operations	(138)	(100)	(246)	(383)
Net cash used in investing activities	(225)	(220)	(539)	(595)
FINANCING ACTIVITIES
Proceeds from debt			1,370
Repayments of debt	(870)		(870)	(550)
Net borrowings (repayments) under short-term loan facilities	1,313	(105)	61	150
Repurchases of common shares	(359)	(294)	(359)	(578)
Other financing activities	1	11	1	16
Financing cash flows from continuing operations	(154)	(629)	(273)	(1,446)
Financing cash flows from discontinued operations	(24)	(22)	(35)	(31)
Net cash used in financing activities	(178)	(651)	(308)	(1,477)
Increase (decrease) in cash and bank overdrafts	400	(37)	375	(1,606)
Translation adjustments	(13)	3	(12)	5
Cash and bank overdrafts at beginning of period	844	800	868	2,367
Cash and bank overdrafts at end of period	1,231	766	1,231	766
Cash and bank overdrafts at end of period comprised of:
Cash and cash equivalents	879	771	879	771
Cash and cash equivalents in assets held for sale	356		356
Bank overdrafts	(4)	(5)	(4)	(5)
Cash and bank overdrafts at end of period	1,231	766	1,231	766
Supplemental cash flow information is provided in note 17.
Interest paid	(114)	(96)	(142)	(165)
Income taxes (paid) received	(33)	6	(95)	(56)
Preference shares [member]
FINANCING ACTIVITIES
Dividends paid			(1)	(1)
Number of common shares [member]
FINANCING ACTIVITIES
Dividends paid	(239)	(241)	(475)	(483)
Computer software [member]
Adjustments for:
Amortization expense	100	93	198	189
Other identifiable intangible assets [member]
Adjustments for:
Amortization expense	$ 28	$ 35	$ 57	$ 70

Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Stated share capital [member]	Contributed surplus [member]	Total capital [member]	Retained earnings [member]	Unrecognized (loss) gain on cash flow hedges [member]	Foreign currency translation adjustments [member]	Total accumulated other comprehensive loss AOCL [member]	Shareholders' equity [member]	Non-controlling interests [member]
Balance (Impact of IFRS 2 amendments [member]) at Dec. 31, 2016	$ 152		$ 152	$ 152					$ 152
Balance (After IFRS 2 amendments [member]) at Dec. 31, 2016	13,408	$ 9,393	348	9,741	$ 7,477	$ 32	$ (4,325)	$ (4,293)	12,925	$ 483
Balance at Dec. 31, 2016	13,256	9,393	196	9,589	7,477	32	(4,325)	(4,293)	12,773	483
Net earnings	520				489				489	31
Other comprehensive income (loss)	380				9	(13)	384	371	380
Total comprehensive income (loss)	900				498	(13)	384	371	869	31
Change in ownership interest of subsidiary	24				13				13	11
Distributions to non-controlling interests	(31)									(31)
Dividends declared on preference shares	(1)				(1)				(1)
Dividends declared on common shares	(500)				(500)				(500)
Shares issued under Dividend Reinvestment Plan ("DRIP")	17	17		17					17
Repurchases of common shares	(591)	(177)		(177)	(414)				(591)
Pre-defined share repurchase plan	(115)	(32)		(32)	(83)				(115)
Stock compensation plans	22	126	(104)	22					22
Balance at Jun. 30, 2017	13,133	9,327	244	9,571	6,990	19	(3,941)	(3,922)	12,639	494
Balance (Adjustments Due to Adoption of IFRS 15 [member]) at Dec. 31, 2017	172				172				172
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 at Dec. 31, 2017	13,575	9,306	243	9,549	7,201	16	(3,689)	(3,673)	13,077	498
Net earnings	346				286				286	60
Other comprehensive income (loss)	(107)				84	10	(201)	(191)	(107)
Total comprehensive income (loss)	239				370	10	(201)	(191)	179	60
Change in ownership interest of subsidiary	24				27				27	(3)
Distributions to non-controlling interests	(35)									(35)
Dividends declared on preference shares	(1)				(1)				(1)
Dividends declared on common shares	(490)				(490)				(490)
Shares issued under Dividend Reinvestment Plan ("DRIP")	15	15		15					15
Repurchases of common shares	(373)	(123)		(123)	(250)				(373)
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

Business Description and Basis of Preparation

6 Months Ended

Jun. 30, 2018

Text block1 [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 source of news and information for professional markets.

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, 2017, except as described below. The interim financial statements are in compliance 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 a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements have been disclosed in note 3 of the interim financial statements and in note 2 of the consolidated financial statements for the year ended December 31, 2017. These interim financial statements should be read in conjunction with the Company’s consolidated financial statements for the year ended December 31, 2017, which are included in the Company’s 2017 annual report.

On January 30, 2018, the Company signed a definitive agreement to enter into a strategic partnership with private equity funds managed by Blackstone. Canada Pension Plan Investment Board and an affiliate of GIC will invest alongside Blackstone. As part of the transaction, the Company will sell a 55% majority stake in its Financial & Risk business and will retain a 45% interest in the business. Beginning with the three-month period ended March 31, 2018, the Financial & Risk business was reported as a discontinued operation.

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.

Prior-year period amounts have been reclassified to reflect the current presentation.

Changes in accounting policy

Effective January 1, 2018, the Company adopted IFRS 15, Revenue from Contracts with Customers (“IFRS 15”). The Company made the following changes as a consequence of adopting IFRS 15:

^●

Revenue for certain term licenses of intellectual property is recognized at the time control is transferred to the customer, rather than over the license term.

^●

Certain contingent payouts are recognized as a reduction of revenue, rather than as expense.

^●

Additional commission expense for sales employees is deferred and a substantial portion of these deferrals will be amortized over three years.

The Company adopted IFRS 15 using the modified retrospective method. Accordingly, the cumulative effect of adoption of $172 million was recognized as an adjustment to the opening balance of retained earnings at January 1, 2018 to reflect an increase in total assets of $150 million due to the deferral of additional commission expense for sales employees and a decrease in total liabilities of $22 million primarily related to adjustments to deferred revenue. Comparative information was not restated.

IFRS 15 did not have a material impact on the consolidated income statement and no impact on cash flows for the three and six months ended June 30, 2018. In the consolidated statement of financial position, total assets increased $160 million and total liabilities decreased $25 million at June 30, 2018, compared to December 31, 2017. Of these amounts, $90 million of the increase in total assets and the entire decrease in total liabilities related to continuing operations. Refer to Note 3 for the Company’s accounting policies, critical judgments and disclosures under IFRS 15.

Effective January 1, 2018, the Company also adopted IFRS 9, Financial Instruments (“IFRS 9”). IFRS 9 introduces new requirements for classification and measurement, impairment and hedge accounting. The Company adopted IFRS 9 using the retrospective method and, as permitted by the standard, elected not to reclassify prior-year period amounts. IFRS 9 did not have a material impact on the consolidated income statement and cash flow for the three and six months ended June 30, 2018 and financial position for the six months ended June 30, 2018.

Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Recent Accounting Pronouncements

Note 2: Recent Accounting Pronouncements

Certain pronouncements were issued by the IASB or International Financial Reporting Interpretations Committee (“IFRIC”) that are effective for accounting periods beginning on or after January 1, 2018. Many of these updates are not applicable or consequential to the Company and have been excluded from the discussion below.

Pronouncements effective for annual periods beginning January 1, 2019:

IFRS 16

Leases

IFRS 16 introduces a single lease accounting model, eliminating the existing distinction between operating and finance leases for lessees. The standard requires a lessee to recognize right-of-use assets and lease liabilities on the statement of financial position for almost all leases having a term of more than 12 months. The Company is reviewing its lease portfolio to evaluate the impact of the standard and is considering changes to its processes and internal controls, including the implementation of a new lease accounting system in 2018. The Company will adopt the standard using the modified retrospective method. As such, the cumulative effect of adoption will be recognized as an adjustment to the opening balance of retained earnings. Prior-year period amounts will not be adjusted. While the assessment of the adoption impact is ongoing, the Company preliminarily expects that IFRS 16 will result in a material increase to assets and liabilities. For reference, the Company’s future aggregate minimum lease payments under non-cancellable operating leases were approximately $1.3 billion at December 31, 2017 (see note 28 to the consolidated financial statements for the year then ended). Of this amount, the Company estimates that approximately $400 million relates to the continuing operations of the business. While the Company also expects a material impact from the reclassification of lease expense from operating expenses to depreciation and interest expense, it does not expect a material impact to net earnings. There will be no impact on consolidated cash flows, however, cash flows from operating activities will increase as cash payments from the principal portion of lease obligations will be reclassified to cash flows from financing activities.

IFRIC 23

Uncertainty over Income Tax Treatments

IFRIC 23 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. The Company is assessing the impact of IFRIC 23 on its consolidated financial statements.

Revenues

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Revenues

Note 3: Revenues

Significant accounting policies

Effective January 1, 2018, revenue is recognized when control of the Company’s products or services is transferred to customers. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled. Such consideration is net of estimated returns, discounts, value-added and other sales taxes.

The Company derives its revenue from selling information, software and services. Revenue is generally recognized as follows:

Recurring revenues

Recurring revenue is generally recognized on a ratable basis over the contract term.

Recurring revenues primarily consist of fees to access products or services delivered electronically over time, such as Westlaw and Checkpoint. These products are generally provided under subscription arrangements, which most customers renew at the end of each subscription term. The majority of subscription arrangements have multiple year terms that range from one to five years. Recurring revenues also include fees from software maintenance arrangements that are recognized over the maintenance period. Arrangements may be billed in advance or in arrears.

Transactions revenues

Transactions revenues are recognized primarily at a point in time and based on their type, as follows:

^●

Volume-based fees related to online searches are recognized based on usage;

^●

Fees from software licenses with no future obligations are recognized at the point of delivery; and

^●

Professional fees from service and consulting arrangements are recognized as services are performed, generally based on hours incurred, reflecting the continuous transfer of control to the customer.

Transactions revenues may be billed in advance or in arrears.

Print revenues

Print revenues are generally recognized at the point of shipment.

Print revenue consists of fees for content that is delivered in traditional paper format rather than online. Revenue is generally billed at shipment.

The Company also considers the following when recognizing revenue:

Multiple performance obligations

Certain customer contracts include multiple products and services, which are accounted for as separate performance obligations when they are distinct. A product or service is distinct if a customer can benefit from it either on its own or with other readily available resources, and the promise to transfer the good or service is separately identifiable in the contract. The transaction price is allocated to the separate performance obligations based on the relative standalone selling price.

A series of distinct goods or services is accounted for as a single performance obligation if the items in the series are substantially the same, have the same pattern of transfer and: (1) each distinct item in the series represents a performance obligation that would be satisfied over time, and (2) the measure to satisfy the performance obligation for each distinct item in the series is the same.

Certain arrangements include installation or implementation services. If these services are distinct, consideration is allocated to them and they are recognized as services are performed and included as transaction revenues. If the services are not distinct, they are recognized as part of the related subscription arrangement or as part of the related software license, as applicable.

Sales involving third parties

Revenue from sales of third party content or services delivered on the Company’s platforms is recorded net of costs when the Company is acting as an agent between the customer and the vendor, and gross when the Company is a principal to the transaction.

Deferred revenue

Deferred revenue is recorded when cash payments are received or due in advance of the transfer of the related products or services.

Contract costs

Incremental costs of obtaining a contract with a customer are recognized as an asset if the benefit of such costs is expected to be longer than one year, and amortized on a straight-line basis over the period that the product or service is transferred to the customer. Incremental costs include sales commissions to direct sales people as well as to account executives and sales management. Sales commissions on new customer contracts are generally paid at significantly higher rates than renewals. As such:

^●

Assets related to new customer contracts are amortized over three years, which may anticipate renewal periods, as management estimates that this corresponds to the period over which a customer benefits from existing technology in the underlying product or service; and

^●

Assets related to renewal customer contracts are amortized over the term of the contract if they are commensurate with previous renewals commissions.

The Company recognizes the following assets, “Deferred commissions” short-term, included within “Prepaid expenses and other current assets” and “Deferred commissions” long-term, included within “Other non-current assets” in the consolidated statement of financial position for costs to obtain a contract.

The Company applied the practical expedient in IFRS 15 to recognize the incremental cost of obtaining a contract as an expense when incurred, if the amortization period is one year or less.

Critical judgments in applying accounting policies

Management exercises significant judgment to determine the following when applying the accounting policy:

^●

whether multiple products and services in customer contracts are distinct performance obligations that should be accounted for separately, or whether they must be accounted for together

^¡

In making the determination, management considers, for example, whether the Company regularly sells a good or service separately, or whether the goods or services are highly interrelated.

^●

the standalone selling price (SSP) for each distinct performance obligation

^¡

The Company typically has more than one SSP for individual products and services due to the stratification of its offerings by customer. As a result, management determines the SSP taking into consideration market conditions and other factors, including the value of its contracts, the product or service sold, the customer’s market, geographic location, and the number and types of users in each contract.

^●

the period over which to amortize assets arising from incremental costs of obtaining a contract

^¡

As management estimates that period corresponds to the period over which a customer benefits from existing technology in the underlying product or service, this judgment is closely linked with the determination of software amortization periods.

Revenues by type and geography

The following tables disaggregate revenues by type and geography and reconcile them to reportable segments from continuing operations for the three and six months ended June 30, 2018 and 2017 (see note 4).


Revenues by type	Legal				Tax & Accounting				Reuters News				Total
Three months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
Recurring		640		613		277		269		64		62		981		944
Transactions		79		77		70		70		8		12		157		159
Print		163		168		12		11		-		-		175		179
Eliminations		-		-		-		-		-		-		(2)		(2)
Total		882		858		359		350		72		74		1,311		1,280


Revenues by type	Legal				Tax & Accounting				Reuters News				Total
Six months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
Recurring		1,277		1,217		587		557		126		125		1,990		1,899
Transactions		155		154		184		185		18		23		357		362
Print		322		328		25		25		-		-		347		353
Eliminations		-		-		-		-		-		-		(4)		(3)
Total		1,754		1,699		796		767		144		148		2,690		2,611


Revenues by geography (country of destination)	Legal				Tax & Accounting				Reuters News				Total
Three months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
U.S.		697		670		281		277		19		18		997		965
Canada (country of domicile)		32		37		10		10		1		1		43		48
Other		13		15		37		38		2		2		52		55
Americas (North America, Latin America, South America)		742		722		328		325		22		21		1,092		1,068

U.K.		84		82		16		11		7		7		107		100
Other		24		18		5		3		28		29		57		50
EMEA (Europe, Middle East and Africa)		108		100		21		14		35		36		164		150

Asia Pacific		32		36		10		11		15		17		57		64
Eliminations		-		-		-		-		-		-		(2)		(2)
Total		882		858		359		350		72		74		1,311		1,280


Revenues by geography (country of destination)	Legal				Tax & Accounting				Reuters News				Total
Six months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
U.S.		1,386		1,340		641		625		37		37		2,064		2,002
Canada (country of domicile)		61		69		22		20		1		1		84		90
Other		23		30		76		73		4		4		103		107
Americas (North America, Latin America, South America)		1,470		1,439		739		718		42		42		2,251		2,199

U.K.		166		156		29		21		14		14		209		191
Other		52		34		9		8		58		56		119		98
EMEA (Europe, Middle East and Africa)		218		190		38		29		72		70		328		289

Asia Pacific		66		70		19		20		30		36		115		126
Eliminations		-		-		-		-		-		-		(4)		(3)
Total		1,754		1,699		796		767		144		148		2,690		2,611

See note 10 for disaggregated revenues from discontinued operations.

Segment Information

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Segment Information

Note 4: Segment Information

The Company’s continuing business is organized as three reportable segments reflecting how the businesses are managed: Legal, Tax & Accounting, and Reuters News. Beginning in the first quarter of 2018, Reuters News became a reportable segment. Reuters News was previously an operating segment included within a Corporate and Other category. The accounting policies applied by the segments are the same as those applied by the Company.

Effective January 1, 2018, the operating results of Financial & Risk are reported as a discontinued operation, except for the Regulatory Intelligence and Compliance Learning businesses that the Company will retain after the closing of the proposed transaction and is now reported as part of the Legal segment. The Company’s Chief Executive Officer continues to act as the chief operating decision maker (CODM) for the Financial & Risk business due to its significance to the Company. See note 10 for financial information regarding the Financial & Risk business.

The reportable segments offer products and services to target markets as described below.

Legal

The Legal segment is a provider of critical online and print information, decision tools, software and services that support legal, investigation, business and government professionals around the world.

Tax & Accounting

The Tax & Accounting segment is a provider of integrated tax compliance and accounting information, software and services for professionals in accounting firms, corporations, law firms and government.

Reuters News

The Reuters News segment is a provider of real-time, multimedia news and information services to newspapers, television and cable networks, radio stations and websites around the globe.

The Company also reports “Corporate”, which includes expenses for corporate functions and does not qualify for segment reporting.


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Revenues
Legal		882		858		1,754		1,699
Tax & Accounting		359		350		796		767
Reuters News		72		74		144		148
Eliminations		(2)		(2)		(4)		(3)
Consolidated revenues		1,311		1,280		2,690		2,611

Adjusted EBITDA
Legal		321		325		640		639
Tax & Accounting		91		103		238		244
Reuters News		8		9		16		22
Corporate		(72)		(57)		(116)		(110)
Adjusted EBITDA		348		380		778		795
Fair value adjustments (see note 6)		(1)		1		(4)		6
Depreciation		(29)		(34)		(59)		(62)
Amortization of computer software		(100)		(93)		(198)		(189)
Amortization of other identifiable intangible assets		(28)		(35)		(57)		(70)
Other operating gains (losses), net		14		(1)		12		12
Consolidated operating profit		204		218		472		492
Net interest expense		(81)		(89)		(159)		(181)
Other finance income (costs)		14		(60)		21		(88)
Share of post-tax earnings (losses) in equity method investments		2		(7)		4		(5)
Tax benefit (expense)		3		(15)		(24)		(26)
Earnings from continuing operations		142		47		314		192

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 for centralized support services such as technology, editorial, real estate and certain global transaction processing functions that are based on usage or other applicable measures.

^●

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

Seasonality	6 Months Ended
Seasonality	Jun. 30, 2018
Text block1 [abstract]
Seasonality	*Note 5: 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 performance of the Tax & Accounting segment 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. The seasonality of the Company’s operating profit may also be impacted by the timing of corporate costs incurred in connection with the repositioning of the business following the sale of a 55% majority stake in the Financial & Risk business.

Operating Expenses

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Operating Expenses

Note 6: Operating Expenses

The components of operating expenses include the following:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Salaries, commissions and allowances		592		550		1,178		1,105
Share-based payments		14		13		23		28
Post-employment benefits		34		39		72		78
Total staff costs		640		602		1,273		1,211
Goods and services⁽¹⁾		229		196		463		414
Data		59		55		112		105
Telecommunications		9		9		14		17
Real estate		26		38		50		69
Fair value adjustments⁽²⁾		1		(1)		4		(6)
Total operating expenses		964		899		1,916		1,810

(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 (Losses), Net	6 Months Ended
Other Operating Gains (Losses), Net	Jun. 30, 2018
Text block1 [abstract]
Other Operating Gains (Losses), Net	*Note 7: Other Operating Gains (Losses), Net* Other operating gains (losses), net, were $14 million and $(1) million for the three months ended June 30, 2018 and 2017, respectively, and $12 million in both the six months ended June 30, 2018 and 2017. 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 (see note 19). The six months ended June 30, 2017 included gains on investments.

Finance Costs, Net

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Finance Costs, Net

Note 8: 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,
	2018		2017		2018		2017
Interest expense:
Debt		74		81		144		162
Derivative financial instruments - hedging activities		2		1		3		3
Other, net		1		-		2		4
Fair value losses (gains) on financial instruments:
Cash flow hedges, transfer from equity		28		(37)		68		(44)
Net foreign exchange (gains) losses on debt		(28)		37		(68)		44
Net interest expense - debt and other		77		82		149		169
Net interest expense - pension and other post-employment benefit plans		7		8		14		15
Interest income		(3)		(1)		(4)		(3)
Net interest expense		81		89		159		181

Three months ended June 30,

Six months ended June 30,

2018

2017

2018

2017

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

(5)

(18)

Net (gains) losses on derivative instruments

(9)

(3)

Other finance (income) costs

(14)

(21)

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

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

Net (gains) losses on derivative instruments

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

Taxation	6 Months Ended
Taxation	Jun. 30, 2018
Text block1 [abstract]
Taxation	*Note 9: Taxation* Tax (benefit) expense was $(3) million and $15 million for the three months ended June 30, 2018 and 2017, respectively, and $24 million and $26 million for the six months ended June 30, 2018 and 2017, respectively. The tax expense 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 for the full year.

Discontinued Operations

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Discontinued Operations

Note 10: Discontinued Operations

On January 30, 2018, the Company signed a definitive agreement to enter into a strategic partnership with private equity funds managed by Blackstone. As part of the transaction, the Company will sell a 55% majority stake in its Financial & Risk business and will retain a 45% interest in the business. The Company expects to receive approximately $17.0 billion in gross proceeds at closing (subject to purchase price adjustments). The transaction is expected to close early in the fourth quarter of 2018 and is subject to specified antitrust/competition and financial regulatory approvals and other customary closing conditions. Substantially all required regulatory approvals have been received. The Company expects to record a pre-tax gain on the transaction at the time of closing.

The results of Financial & Risk are reported as discontinued operations in the consolidated financial statements for all periods presented.

Earnings from discontinued operations are summarized as follows:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Revenues		1,553		1,501		3,136		2,986
Expenses		(1,022)		(1,352)		(2,220)		(2,671)
Earnings from discontinued operations before income tax		531		149		916		315
Tax (expense) benefit⁽¹⁾		(16)		10		(884)		13
Earnings from discontinued operations, net of tax		515		159		32		328

Adjusted EBITDA (Financial & Risk)		472		458		998		919
Fair value adjustments		83		(54)		65		(124)
Depreciation		-		(43)		(14)		(87)
Amortization of computer software		-		(75)		(30)		(159)
Amortization of other identifiable intangible assets		-		(85)		(28)		(169)
Other operating losses, net		(19)		(20)		(60)		(29)
Net interest expense		(2)		(6)		(6)		(7)
Other finance income (costs)		5		(31)		-		(30)
Intellectual Property & Science (loss) earnings from discontinued operations		(8)		5		(9)		1
Earnings from discontinued operations before income tax		531		149		916		315

(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, associated with the proposed sale of a 55% interest in the Financial & Risk business. These deferred taxes were not required before 2018 as the business was not considered held for sale until January 2018. The benefit in the three-month period represented a revision to an estimate recorded in the first quarter. The current and deferred tax consequences of the divestiture could vary significantly depending on the ultimate structure of the transaction.

The assets and liabilities classified as held for sale in the consolidated statement of financial position are as follows:


	June 30,
	2018
Cash and cash equivalents⁽¹⁾		356
Trade and other receivables		643
Other financial assets		12
Prepaid expenses and other current assets		272
Computer hardware and other property, net		436
Computer software, net		724
Other identifiable intangible assets, net		1,922
Goodwill		9,923
Other assets		140
Deferred tax		17
Total assets held for sale		14,445

Current indebtedness		1
Payables, accruals and provisions		762
Deferred revenue		193
Other financial liabilities		14
Provisions and other liabilities		422
Deferred tax		265
Total liabilities associated with assets held for sale		1,657

(1)	Includes cash and cash equivalents of $109 million, 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.

Relative to assets held for sale, foreign currency translation adjustments recorded within accumulated other comprehensive loss in the consolidated statement of financial position were losses of approximately $2.5 billion to $3.1 billion at June 30, 2018.

The following tables disaggregate revenues by type and geography for the Financial & Risk segment for the three and six months ended June 30, 2018 and 2017:


	Three months ended June 30,				Six months ended June 30,
Revenues by type (Financial & Risk)	2018		2017		2018		2017
Recurring		1,314		1,277		2,645		2,547
Transactions		239		224		491		439
Total		1,553		1,501		3,136		2,986

Revenues by geography (Financial & Risk)	Three months ended June 30,				Six months ended June 30,
(country of destination)	2018		2017		2018		2017
U.S.		568		562		1,149		1,128
Canada (country of domicile)		34		33		67		64
Other		26		25		53		51
Americas (North America, Latin America, South America)		628		620		1,269		1,243

U.K.		232		216		472		423
Other		398		376		806		747
EMEA (Europe, Middle East and Africa)		630		592		1,278		1,170

Asia Pacific		295		289		589		573
Total		1,553		1,501		3,136		2,986

Earnings Per Share

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Earnings Per Share

Note 11: Earnings Per Share

Basic earnings per share was calculated by dividing (loss) 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 (loss) 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,
	2018		2017		2018		2017
Earnings attributable to common shareholders		625		192		286		489
Less: Dividends declared on preference shares		-		-		(1)		(1)
Earnings used in consolidated earnings per share		625		192		285		488
Less: Earnings from discontinued operations, net of tax		(515)		(159)		(32)		(328)
Remove: Non-controlling interests from discontinued operations		32		14		60		31
Earnings used in earnings per share from continuing operations		142		47		313		191

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,

2018

2017

2018

2017

Weighted-average number of common shares outstanding

708,974,582

720,301,646

709,448,598

723,395,550

Weighted-average number of vested DSUs

699,588

708,311

767,352

692,636

Basic

709,674,170

721,009,957

710,215,950

724,088,186

Effect of stock options and TRSUs

421,224

1,494,152

581,482

1,321,292

Diluted

710,095,394

722,504,109

710,797,432

725,409,478

Financial Instruments

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Financial Instruments

Note 12: Financial Instruments

Financial assets and liabilities

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


June 30, 2018⁽¹⁾	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		312		567		-		-		879
Trade and other receivables		856		-		-		-		856
Other financial assets - current		41		7		-		-		48
Other financial assets - non-current		17		-		23		-		40
Current indebtedness		(2,595)		-		-		-		(2,595)
Trade payables (see note 14)		(138)		-		-		-		(138)
Accruals (see note 14)		(723)		-		-		-		(723)
Other financial liabilities - current⁽²⁾		(1,009)		(3)		-		(94)		(1,106)
Long-term indebtedness		(4,936)		-		-		-		(4,936)
Other financial liabilities - non current		-		-		-		(211)		(211)
Total		(8,175)		571		23		(305)		(7,886)

(1)	Current presentation reflects the adoption of IFRS 9, Financial Instruments, effective January 1, 2018.

(2)	Includes a commitment to repurchase up to $967 million of shares related to the Company’s pre-defined plan with its broker to repurchase the Company’s shares during its internal trading blackout period. See note 16.


December 31, 2017	Cash, Trade and Other Receivables		Assets/ (Liabilities) at Fair Value through Earnings		Derivatives Used for Hedging		Available for Sale		Other Financial Liabilities		Total
Cash and cash equivalents		874		-		-		-		-		874
Trade and other receivables		1,457		-		-		-		-		1,457
Other financial assets - current		78		20		-		-		-		98
Other financial assets - non-current		49		1		-		33		-		83
Current indebtedness		-		-		-		-		(1,644)		(1,644)
Trade payables (see note 14)		-		-		-		-		(307)		(307)
Accruals (see note 14)		-		-		-		-		(1,477)		(1,477)
Other financial liabilities - current		-		(49)		-		-		(80)		(129)
Long-term indebtedness		-		-		-		-		(5,382)		(5,382)
Other financial liabilities - non current		-		(31)		(246)		-		(2)		(279)
Total		2,458		(59)		(246)		33		(8,892)		(6,706)

Cash and cash equivalents

Of total cash and cash equivalents, $20 million and $126 million at June 30, 2018 and December 31, 2017, 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.

Long-term debt activity

The Company repaid the following notes in the six months ended June 30, 2017:


Month/Year	Transaction	Principal Amount (in millions)
	Notes repaid
February 2017	1.30% Notes, due 2017	US$550

Commercial paper

Under its commercial paper programs, the Company may issue up to $2.0 billion of notes. At June 30, 2018, current indebtedness included $1,711 million of outstanding commercial paper within the consolidated statement of financial position.

Credit facilities

The Company has two credit facilities available.

^●

The $2.4 billion credit facility matures in November 2021 and may be used to provide liquidity for general corporate purposes (including support for its commercial paper programs). In the six-month period ended June 30, 2018, the Company borrowed and repaid $370 million under this credit facility. There were no borrowings under this credit facility at June 30, 2018. Based on the Company’s current credit ratings, the cost of borrowing under the agreement is priced at LIBOR/EURIBOR plus 100 basis points.

^●

The $1.5 billion credit facility is comprised of a $0.5 billion term loan facility and a $1.0 billion revolving credit facility, that expires on November 21, 2018. The Company had no borrowings under the term loan facility, which was available to fund acquisitions up to June 30, 2018. In the six-month period ended June 30, 2018, the Company borrowed $1.0 billion and repaid $0.5 billion under this credit facility. The revolving credit facility may be used for general corporate purposes up to the expiration date. The cost of borrowing was priced at LIBOR plus 87.5 basis points.

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, 2018

Primary Debt
Instruments

Derivative
Instruments
Liability

Primary Debt
Instruments

Derivative
Instruments
Liability

Bank and other

Commercial paper

1,711

1,713

Credit facilities

497

500

C$500, 3.369% Notes, due 2019

380

383

C$750, 4.35% Notes, due 2020

569

153

590

153

C$550, 3.309% Notes, due 2021

417

423

$500, 4.70% Notes, due 2019

499

509

$350, 3.95% Notes, due 2021

349

352

$600, 4.30% Notes, due 2023

596

610

$450, 3.85% Notes, due 2024

447

442

$500, 3.35% Notes, due 2026

495

460

$350, 4.50% Notes, due 2043

341

321

$350, 5.65% Notes, due 2043

341

374

$400, 5.50% Debentures, due 2035

394

416

$500, 5.85% Debentures, due 2040

490

543

Total

7,531

305

7,641

305

Current portion

2,595

Long-term portion

4,936

211


	Carrying Amount				Fair Value
December 31, 2017	Primary Debt Instruments		Derivative Instruments Liability		Primary Debt Instruments		Derivative Instruments Liability
Bank and other		4		-		7		-
Commercial paper		1,637		-		1,641		-
C$500, 3.369% Notes, due 2019		398		75		405		75
C$750, 4.35% Notes, due 2020		597		128		629		128
C$550, 3.309% Notes, due 2021		437		43		450		43
$500, 4.70% Notes, due 2019		499		-		519		-
$350, 3.95% Notes, due 2021		349		-		361		-
$600, 4.30% Notes, due 2023		597		-		634		-
$450, 3.85% Notes, due 2024		447		-		459		-
$500, 3.35% Notes, due 2026		495		-		497		-
$350, 4.50% Notes, due 2043		341		-		361		-
$350, 5.65% Notes, due 2043		341		-		420		-
$400, 5.50% Debentures, due 2035		394		-		459		-
$500, 5.85% Debentures, due 2040		490		-		607		-
Total		7,026		246		7,449		246
Current portion		1,644		-
Long-term portion		5,382		246

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, 2018⁽¹⁾				Total
Assets	Level 1	Level 2	Level 3		Balance
Money market accounts	-	567	-		567
Forward exchange contracts⁽²⁾	-	7	-		7
Financial assets at fair value through earnings	-	574	-		574
Financial assets at fair value through other comprehensive income⁽³⁾	6	17	-		23
Total assets	6	591	-		597

Liabilities
Forward exchange contracts⁽²⁾	-	(3)	-		(3)
Financial liabilities at fair value through earnings	-	(3)	-		(3)
Derivatives used for hedging⁽⁴⁾	-	(305)	-		(305)
Total liabilities	-	(308)	-		(308)



December 31, 2017				Total
Assets	Level 1	Level 2	Level 3		Balance
Embedded derivatives⁽⁵⁾	-	12	-		12
Forward exchange contracts⁽²⁾	-	9	-		9
Financial assets at fair value through earnings	-	21	-		21
Available for sale investments⁽³⁾	7	26	-		33
Total assets	7	47	-		54

Liabilities
Embedded derivatives⁽⁵⁾	-	(63)	-		(63)
Forward exchange contracts⁽²⁾	-	(16)	-		(16)
Contingent consideration⁽⁶⁾	-	-	(1)		(1)
Financial liabilities at fair value through earnings	-	(79)	(1)		(80)
Derivatives used for hedging⁽⁴⁾	-	(246)	-		(246)
Total liabilities	-	(325)	(1)		(326)

(1)	Current presentation reflects the adoption of IFRS 9, Financial Instruments, effective January 1, 2018.

(2)	Used to manage foreign exchange risk on cash flows excluding indebtedness.

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

(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.

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

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, 2018.

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 and forward foreign exchange contracts is 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.

Other Non-Current Assets

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Other Non-Current Assets

Note 13: Other Non-Current Assets


	June 30,		December 31,
	2018		2017
Net defined benefit plan surpluses		18		30
Cash surrender value of life insurance policies		305		302
Equity method investments		155		167
Deferred commissions		71		8
Other non-current assets		37		98
Total other non-current assets		586		605

Payables, Accruals and Provisions

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Payables, Accruals and Provisions

Note 14: Payables, Accruals and Provisions


	June 30,		December 31,
	2018		2017
Trade payables		138		307
Accruals		723		1,477
Provisions		100		166
Other current liabilities		76		136
Total payables, accruals and provisions		1,037		2,086

Provisions and Other Non-Current Liabilities

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Provisions and Other Non-Current Liabilities

Note 15: Provisions and Other Non-Current Liabilities


	June 30,		December 31,
	2018		2017
Net defined benefit plan obligations		681		984
Deferred compensation and employee incentives		140		159
Provisions		63		124
Uncertain tax positions		287		337
Other non-current liabilities		33		136
Total provisions and other non-current liabilities		1,204		1,740

Capital

6 Months Ended

Jun. 30, 2018

Text block1 [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 effected under a normal course issuer bid (“NCIB”). In May 2018, the Company renewed its NCIB for an additional 12 months. Under the renewed NCIB, the Company may repurchase up to 35.5 million common shares between May 30, 2018 and May 29, 2019 in open market transactions on the TSX, the NYSE and/or other exchanges and alternative trading systems, if eligible, or by such other means as may be permitted by the TSX and/or NYSE or under applicable law, including private agreement purchases if the Company receives an issuer bid exemption order from applicable securities regulatory authorities in Canada for such purchases. The price that the Company will pay for shares in open market transactions under the NCIB will be the market price at the time of purchase or such other price as may be permitted by TSX. In the six months ended June 30, 2017, the Company privately repurchased 6.0 million common shares at a discount to the then-prevailing market price.

Details of share repurchases were as follows:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Share repurchases (millions of U.S. dollars)		359		294		359		578
Shares repurchased (number in millions)		9.1		6.7		9.1		13.5
Share repurchases—average price per share in U.S. dollars	$	39.54	$	43.73	$	39.54	$	42.70

Decisions regarding any future repurchases will depend on the timing of the closing of the proposed strategic partnership transaction and other factors, such as market conditions, share price, and other opportunities to invest capital for growth. The Company may elect to suspend or discontinue its share repurchases at any time, in accordance with applicable laws. From time to time when the Company does not possess material nonpublic information about itself or its securities, it may enter into a pre-defined plan with its broker to allow for the repurchase of shares at times when the Company ordinarily would not be active in the market due to its own internal trading blackout periods, insider trading rules or otherwise. Any such plans entered into with the Company’s broker will be adopted in accordance with applicable Canadian securities laws and the requirements of Rule 10b5-1 under the U.S. Securities Exchange Act of 1934, as amended. In June 2018, the Company entered into such a plan with its broker. In connection with the remaining portion of this plan, the Company recorded a $967 million liability in “Other financial liabilities” within current liabilities at June 30, 2018 with a corresponding amount recorded in equity in the consolidated statement of financial position.

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,
	2018		2017		2018		2017
Dividends declared per common share	$	0.345	$	0.345	$	0.69	$	0.69

Dividends declared		245		249		490		500
Dividends reinvested		(6)		(8)		(15)		(17)
Dividends paid		239		241		475		483

Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2018

Text block1 [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,
	2018		2017		2018		2017
Non-cash employee benefit charges		40		47		76		88
Net (gains) losses on foreign exchange and derivative financial instruments		(12)		63		(17)		89
Other		(17)		41		(1)		34
		11		151		58		211

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


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Trade and other receivables		(30)		11		61		3
Prepaid expenses and other current assets		18		5		19		7
Other financial assets		6		9		41		37
Payables, accruals and provisions		(24)		(64)		(196)		(239)
Deferred revenue		99		81		45		44
Other financial liabilities		(11)		(9)		(46)		(45)
Income taxes		18		33		(2)		8
Other⁽¹⁾		(4)		(20)		(22)		(34)
		72		46		(100)		(219)

(1)	Includes $(6) million (2017—$(7) million) and $(14) million (2017—$(15) million related to employee benefit plans for the three and six months ended June 30, 2018 and 2017, respectively.

Details of income taxes paid are as follows:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Operating activities — continuing operations		(8)		9		(43)		(19)
Operating activities — discontinued operations		(25)		(20)		(52)		(54)
Investing activities — discontinued operations		-		17		-		17
Total income taxes (paid) received		(33)		6		(95)		(56)

Contingencies	6 Months Ended
Contingencies	Jun. 30, 2018
Text block1 [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
Related Party Transactions	Jun. 30, 2018
Text block1 [abstract]
Related Party Transactions	*Note 19: Related Party Transactions* As of June 30, 2018, Woodbridge beneficially owned approximately 64% of the Company’s shares. In April 2018, the Company sold a Canadian wholly-owned subsidiary to a company affiliated with Woodbridge for $16 million. The subsidiary’s assets consisted of accumulated losses that management did not expect to utilize against future taxable income prior to their expiry. As such, no tax benefit for the losses had been recognized in the consolidated financial statements. Under Canadian law, certain losses may only be transferred to related companies, such as those affiliated with Woodbridge. A gain of $16 million was recorded within “Other operating gains (losses), net” within the consolidated income statement. In connection with this transaction, the board of directors’ Corporate Governance Committee obtained an independent fairness opinion. The Company utilized the independent fairness opinion to determine that the negotiated price between the Company and the purchaser was reasonable. After receiving the recommendation of the Corporate Governance Committee, the board of directors approved the transaction. Directors who were not considered independent because of their positions with Woodbridge refrained from deliberating and voting on the matter at both the committee and board meetings. Except for the above transaction, there were no new significant related party transactions during the six months ended June 30, 2018. Refer to “Related party transactions” disclosed in note 29 of the Company’s consolidated financial statements for the year ended December 31, 2017, which are included in the Company’s 2017 annual report, for information regarding related party transactions.

Business Description and Basis of Preparation (Policies)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Basis of preparation

Basis of preparation

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

Prior-year period amounts have been reclassified to reflect the current presentation.

Changes in accounting policy

Changes in accounting policy

Effective January 1, 2018, the Company adopted IFRS 15, Revenue from Contracts with Customers (“IFRS 15”). The Company made the following changes as a consequence of adopting IFRS 15:

^●

Revenue for certain term licenses of intellectual property is recognized at the time control is transferred to the customer, rather than over the license term.

^●

Certain contingent payouts are recognized as a reduction of revenue, rather than as expense.

^●

Additional commission expense for sales employees is deferred and a substantial portion of these deferrals will be amortized over three years.

Recent Accounting Pronouncements

Pronouncements effective for annual periods beginning January 1, 2019:

IFRS 16

Leases

IFRIC 23

Uncertainty over Income Tax Treatments

Revenues (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Summary of Revenues by Type


Revenues by type	Legal				Tax & Accounting				Reuters News				Total
Three months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
Recurring		640		613		277		269		64		62		981		944
Transactions		79		77		70		70		8		12		157		159
Print		163		168		12		11		-		-		175		179
Eliminations		-		-		-		-		-		-		(2)		(2)
Total		882		858		359		350		72		74		1,311		1,280


Revenues by type	Legal				Tax & Accounting				Reuters News				Total
Six months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
Recurring		1,277		1,217		587		557		126		125		1,990		1,899
Transactions		155		154		184		185		18		23		357		362
Print		322		328		25		25		-		-		347		353
Eliminations		-		-		-		-		-		-		(4)		(3)
Total		1,754		1,699		796		767		144		148		2,690		2,611

Summary of Revenues by Geography


Revenues by geography (country of destination)	Legal				Tax & Accounting				Reuters News				Total
Three months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
U.S.		697		670		281		277		19		18		997		965
Canada (country of domicile)		32		37		10		10		1		1		43		48
Other		13		15		37		38		2		2		52		55
Americas (North America, Latin America, South America)		742		722		328		325		22		21		1,092		1,068

U.K.		84		82		16		11		7		7		107		100
Other		24		18		5		3		28		29		57		50
EMEA (Europe, Middle East and Africa)		108		100		21		14		35		36		164		150

Asia Pacific		32		36		10		11		15		17		57		64
Eliminations		-		-		-		-		-		-		(2)		(2)
Total		882		858		359		350		72		74		1,311		1,280


Revenues by geography (country of destination)	Legal				Tax & Accounting				Reuters News				Total
Six months ended June 30,	2018		2017		2018		2017		2018		2017		2018		2017
U.S.		1,386		1,340		641		625		37		37		2,064		2,002
Canada (country of domicile)		61		69		22		20		1		1		84		90
Other		23		30		76		73		4		4		103		107
Americas (North America, Latin America, South America)		1,470		1,439		739		718		42		42		2,251		2,199

U.K.		166		156		29		21		14		14		209		191
Other		52		34		9		8		58		56		119		98
EMEA (Europe, Middle East and Africa)		218		190		38		29		72		70		328		289

Asia Pacific		66		70		19		20		30		36		115		126
Eliminations		-		-		-		-		-		-		(4)		(3)
Total		1,754		1,699		796		767		144		148		2,690		2,611

Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Revenues and Adjusted EBITDA by Segment


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Revenues
Legal		882		858		1,754		1,699
Tax & Accounting		359		350		796		767
Reuters News		72		74		144		148
Eliminations		(2)		(2)		(4)		(3)
Consolidated revenues		1,311		1,280		2,690		2,611

Adjusted EBITDA
Legal		321		325		640		639
Tax & Accounting		91		103		238		244
Reuters News		8		9		16		22
Corporate		(72)		(57)		(116)		(110)
Adjusted EBITDA		348		380		778		795
Fair value adjustments (see note 6)		(1)		1		(4)		6
Depreciation		(29)		(34)		(59)		(62)
Amortization of computer software		(100)		(93)		(198)		(189)
Amortization of other identifiable intangible assets		(28)		(35)		(57)		(70)
Other operating gains (losses), net		14		(1)		12		12
Consolidated operating profit		204		218		472		492
Net interest expense		(81)		(89)		(159)		(181)
Other finance income (costs)		14		(60)		21		(88)
Share of post-tax earnings (losses) in equity method investments		2		(7)		4		(5)
Tax (benefit) expense		3		(15)		(24)		(26)
Earnings from continuing operations		142		47		314		192

Operating Expenses (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Components of Operating Expenses

The components of operating expenses include the following:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Salaries, commissions and allowances		592		550		1,178		1,105
Share-based payments		14		13		23		28
Post-employment benefits		34		39		72		78
Total staff costs		640		602		1,273		1,211
Goods and services⁽¹⁾		229		196		463		414
Data		59		55		112		105
Telecommunications		9		9		14		17
Real estate		26		38		50		69
Fair value adjustments⁽²⁾		1		(1)		4		(6)
Total operating expenses		964		899		1,916		1,810

(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, 2018

Text block1 [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,
	2018		2017		2018		2017
Interest expense:
Debt		74		81		144		162
Derivative financial instruments - hedging activities		2		1		3		3
Other, net		1		-		2		4
Fair value losses (gains) on financial instruments:
Cash flow hedges, transfer from equity		28		(37)		68		(44)
Net foreign exchange (gains) losses on debt		(28)		37		(68)		44
Net interest expense - debt and other		77		82		149		169
Net interest expense - pension and other post-employment benefit plans		7		8		14		15
Interest income		(3)		(1)		(4)		(3)
Net interest expense		81		89		159		181

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

Three months ended June 30,

Six months ended June 30,

2018

2017

2018

2017

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

(5)

(18)

Net (gains) losses on derivative instruments

(9)

(3)

Other finance (income) costs

(14)

(21)

Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Summary of Earnings from Discontinued Operations

Earnings from discontinued operations are summarized as follows:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Revenues		1,553		1,501		3,136		2,986
Expenses		(1,022)		(1,352)		(2,220)		(2,671)
Earnings from discontinued operations before income tax		531		149		916		315
Tax (expense) benefit⁽¹⁾		(16)		10		(884)		13
Earnings from discontinued operations, net of tax		515		159		32		328

Adjusted EBITDA (Financial & Risk)		472		458		998		919
Fair value adjustments		83		(54)		65		(124)
Depreciation		-		(43)		(14)		(87)
Amortization of computer software		-		(75)		(30)		(159)
Amortization of other identifiable intangible assets		-		(85)		(28)		(169)
Other operating losses, net		(19)		(20)		(60)		(29)
Net interest expense		(2)		(6)		(6)		(7)
Other finance income (costs)		5		(31)		-		(30)
Intellectual Property & Science (loss) earnings from discontinued operations		(8)		5		(9)		1
Earnings from discontinued operations before income tax		531		149		916		315

(1)

Summary of Assets and Liabilities as Held for Sale

The assets and liabilities classified as held for sale in the consolidated statement of financial position are as follows:


	June 30,
	2018
Cash and cash equivalents⁽¹⁾		356
Trade and other receivables		643
Other financial assets		12
Prepaid expenses and other current assets		272
Computer hardware and other property, net		436
Computer software, net		724
Other identifiable intangible assets, net		1,922
Goodwill		9,923
Other assets		140
Deferred tax		17
Total assets held for sale		14,445

Current indebtedness		1
Payables, accruals and provisions		762
Deferred revenue		193
Other financial liabilities		14
Provisions and other liabilities		422
Deferred tax		265
Total liabilities associated with assets held for sale		1,657

(1)	Includes cash and cash equivalents of $109 million, 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.

Summary of Disaggregation of Revenue by Type

The following tables disaggregate revenues by type and geography for the Financial & Risk segment for the three and six months ended June 30, 2018 and 2017:

Three months ended June 30,

Six months ended June 30,

Revenues by type (Financial & Risk)

2018

2017

2018

2017

Recurring

1,314

1,277

2,645

2,547

Transactions

239

224

491

439

Total

1,553

1,501

3,136

2,986

Summary of Disaggregation of Revenue by Geography

Revenues by geography (Financial & Risk)	Three months ended June 30,				Six months ended June 30,
(country of destination)	2018		2017		2018		2017
U.S.		568		562		1,149		1,128
Canada (country of domicile)		34		33		67		64
Other		26		25		53		51
Americas (North America, Latin America, South America)		628		620		1,269		1,243

U.K.		232		216		472		423
Other		398		376		806		747
EMEA (Europe, Middle East and Africa)		630		592		1,278		1,170

Asia Pacific		295		289		589		573
Total		1,553		1,501		3,136		2,986

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [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,
	2018		2017		2018		2017
Earnings attributable to common shareholders		625		192		286		489
Less: Dividends declared on preference shares		-		-		(1)		(1)
Earnings used in consolidated earnings per share		625		192		285		488
Less: Earnings from discontinued operations, net of tax		(515)		(159)		(32)		(328)
Remove: Non-controlling interests from discontinued operations		32		14		60		31
Earnings used in earnings per share from continuing operations		142		47		313		191

Weighted Average Common Shares

Three months ended June 30,

Six months ended June 30,

2018

2017

2018

2017

Weighted-average number of common shares outstanding

708,974,582

720,301,646

709,448,598

723,395,550

Weighted-average number of vested DSUs

699,588

708,311

767,352

692,636

Basic

709,674,170

721,009,957

710,215,950

724,088,186

Effect of stock options and TRSUs

421,224

1,494,152

581,482

1,321,292

Diluted

710,095,394

722,504,109

710,797,432

725,409,478

Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Summary of Financial Assets and Liabilities

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


June 30, 2018⁽¹⁾	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		312		567		-		-		879
Trade and other receivables		856		-		-		-		856
Other financial assets - current		41		7		-		-		48
Other financial assets - non-current		17		-		23		-		40
Current indebtedness		(2,595)		-		-		-		(2,595)
Trade payables (see note 14)		(138)		-		-		-		(138)
Accruals (see note 14)		(723)		-		-		-		(723)
Other financial liabilities - current⁽²⁾		(1,009)		(3)		-		(94)		(1,106)
Long-term indebtedness		(4,936)		-		-		-		(4,936)
Other financial liabilities - non current		-		-		-		(211)		(211)
Total		(8,175)		571		23		(305)		(7,886)

(1)	Current presentation reflects the adoption of IFRS 9, Financial Instruments effective January 1, 2018.

(2)	Includes a commitment to repurchase up to $967 million of shares related to the Company’s pre-defined plan with its broker to repurchase the Company’s shares during its internal trading blackout period. See note 16.


December 31, 2017	Cash, Trade and Other Receivables		Assets/ (Liabilities) at Fair Value through Earnings		Derivatives Used for Hedging		Available for Sale		Other Financial Liabilities		Total
Cash and cash equivalents		874		-		-		-		-		874
Trade and other receivables		1,457		-		-		-		-		1,457
Other financial assets - current		78		20		-		-		-		98
Other financial assets - non-current		49		1		-		33		-		83
Current indebtedness		-		-		-		-		(1,644)		(1,644)
Trade payables (see note 14)		-		-		-		-		(307)		(307)
Accruals (see note 14)		-		-		-		-		(1,477)		(1,477)
Other financial liabilities - current		-		(49)		-		-		(80)		(129)
Long-term indebtedness		-		-		-		-		(5,382)		(5,382)
Other financial liabilities - non current		-		(31)		(246)		-		(2)		(279)
Total		2,458		(59)		(246)		33		(8,892)		(6,706)

Summmary of Information Regarding Notes Repaid

The Company repaid the following notes in the six months ended June 30, 2017:


Month/Year	Transaction	Principal Amount (in millions)
	Notes repaid
February 2017	1.30% Notes, due 2017	US$550

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, 2018

Primary Debt
Instruments

Derivative
Instruments
Liability

Primary Debt
Instruments

Derivative
Instruments
Liability

Bank and other

Commercial paper

1,711

1,713

Credit facilities

497

500

C$500, 3.369% Notes, due 2019

380

383

C$750, 4.35% Notes, due 2020

569

153

590

153

C$550, 3.309% Notes, due 2021

417

423

$500, 4.70% Notes, due 2019

499

509

$350, 3.95% Notes, due 2021

349

352

$600, 4.30% Notes, due 2023

596

610

$450, 3.85% Notes, due 2024

447

442

$500, 3.35% Notes, due 2026

495

460

$350, 4.50% Notes, due 2043

341

321

$350, 5.65% Notes, due 2043

341

374

$400, 5.50% Debentures, due 2035

394

416

$500, 5.85% Debentures, due 2040

490

543

Total

7,531

305

7,641

305

Current portion

2,595

Long-term portion

4,936

211


	Carrying Amount				Fair Value
December 31, 2017	Primary Debt Instruments		Derivative Instruments Liability		Primary Debt Instruments		Derivative Instruments Liability
Bank and other		4		-		7		-
Commercial paper		1,637		-		1,641		-
C$500, 3.369% Notes, due 2019		398		75		405		75
C$750, 4.35% Notes, due 2020		597		128		629		128
C$550, 3.309% Notes, due 2021		437		43		450		43
$500, 4.70% Notes, due 2019		499		-		519		-
$350, 3.95% Notes, due 2021		349		-		361		-
$600, 4.30% Notes, due 2023		597		-		634		-
$450, 3.85% Notes, due 2024		447		-		459		-
$500, 3.35% Notes, due 2026		495		-		497		-
$350, 4.50% Notes, due 2043		341		-		361		-
$350, 5.65% Notes, due 2043		341		-		420		-
$400, 5.50% Debentures, due 2035		394		-		459		-
$500, 5.85% Debentures, due 2040		490		-		607		-
Total		7,026		246		7,449		246
Current portion		1,644		-
Long-term portion		5,382		246

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, 2018⁽¹⁾				Total
Assets	Level 1	Level 2	Level 3		Balance
Money market accounts	-	567	-		567
Forward exchange contracts⁽²⁾	-	7	-		7
Financial assets at fair value through earnings	-	574	-		574
Financial assets at fair value through other comprehensive income⁽³⁾	6	17	-		23
Total assets	6	591	-		597

Liabilities
Forward exchange contracts⁽²⁾	-	(3)	-		(3)
Financial liabilities at fair value through earnings	-	(3)	-		(3)
Derivatives used for hedging⁽⁴⁾	-	(305)	-		(305)
Total liabilities	-	(308)	-		(308)



December 31, 2017				Total
Assets	Level 1	Level 2	Level 3		Balance
Embedded derivatives⁽⁵⁾	-	12	-		12
Forward exchange contracts⁽²⁾	-	9	-		9
Financial assets at fair value through earnings	-	21	-		21
Available for sale investments⁽³⁾	7	26	-		33
Total assets	7	47	-		54

Liabilities
Embedded derivatives⁽⁵⁾	-	(63)	-		(63)
Forward exchange contracts⁽²⁾	-	(16)	-		(16)
Contingent consideration⁽⁶⁾	-	-	(1)		(1)
Financial liabilities at fair value through earnings	-	(79)	(1)		(80)
Derivatives used for hedging⁽⁴⁾	-	(246)	-		(246)
Total liabilities	-	(325)	(1)		(326)

(1)	Current presentation reflects the adoption of IFRS 9, Financial Instruments, effective January 1, 2018.

(2)	Used to manage foreign exchange risk on cash flows excluding indebtedness.

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

(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.

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

Other Non-Current Assets (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Summary of Other Non-Current Assets


	June 30,		December 31,
	2018		2017
Net defined benefit plan surpluses		18		30
Cash surrender value of life insurance policies		305		302
Equity method investments		155		167
Deferred commissions		71		8
Other non-current assets		37		98
Total other non-current assets		586		605

Payables, Accruals and Provisions (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Schedule of Payables, Accruals and Provisions


	June 30,		December 31,
	2018		2017
Trade payables		138		307
Accruals		723		1,477
Provisions		100		166
Other current liabilities		76		136
Total payables, accruals and provisions		1,037		2,086

Provisions and Other Non-Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Summary of Provisions and Other Non-Current Liabilities


	June 30,		December 31,
	2018		2017
Net defined benefit plan obligations		681		984
Deferred compensation and employee incentives		140		159
Provisions		63		124
Uncertain tax positions		287		337
Other non-current liabilities		33		136
Total provisions and other non-current liabilities		1,204		1,740

Capital (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [abstract]

Details of Share Repurchases

Details of share repurchases were as follows:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Share repurchases (millions of U.S. dollars)		359		294		359		578
Shares repurchased (number in millions)		9.1		6.7		9.1		13.5
Share repurchases—average price per share in U.S. dollars	$	39.54	$	43.73	$	39.54	$	42.70

Summary of dividend declared and paid


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Dividends declared per common share	$	0.345	$	0.345	$	0.69	$	0.69

Dividends declared		245		249		490		500
Dividends reinvested		(6)		(8)		(15)		(17)
Dividends paid		239		241		475		483

Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2018

Text block1 [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,
	2018		2017		2018		2017
Non-cash employee benefit charges		40		47		76		88
Net (gains) losses on foreign exchange and derivative financial instruments		(12)		63		(17)		89
Other		(17)		41		(1)		34
		11		151		58		211

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,
	2018		2017		2018		2017
Trade and other receivables		(30)		11		61		3
Prepaid expenses and other current assets		18		5		19		7
Other financial assets		6		9		41		37
Payables, accruals and provisions		(24)		(64)		(196)		(239)
Deferred revenue		99		81		45		44
Other financial liabilities		(11)		(9)		(46)		(45)
Income taxes		18		33		(2)		8
Other⁽¹⁾		(4)		(20)		(22)		(34)
		72		46		(100)		(219)

(1)	Includes $(6) million (2017—$(7) million) and $(14) million (2017—$(15) million related to employee benefit plans for the three and six months ended June 30, 2018 and 2017, respectively.

Details of Income Taxes Paid

Details of income taxes paid are as follows:


	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Operating activities — continuing operations		(8)		9		(43)		(19)
Operating activities — discontinued operations		(25)		(20)		(52)		(54)
Investing activities — discontinued operations		-		17		-		17
Total income taxes (paid) received		(33)		6		(95)		(56)

Summary of Business Description and Basis of Preparation - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jan. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Disclosure of business description and basis of presentation [line items]
Adjustment to opening balance of retained earnings	$ 6,375			$ 7,201
Assets	26,975			26,480
Liabilities	14,812			$ 12,905
Financial & risk [member]
Disclosure of business description and basis of presentation [line items]
Stake to be sold		55.00%
Stake to be retained		45.00%
Adjustments Due to Adoption of IFRS 15 [member]
Disclosure of business description and basis of presentation [line items]
Assets	160		$ 150
Liabilities	25		(22)
Adjustments Due to Adoption of IFRS 15 [member] \| Continuing operations [member]
Disclosure of business description and basis of presentation [line items]
Assets	90
Liabilities	$ 25
Adjustments Due to Adoption of IFRS 15 [member] \| Retained earnings [member]
Disclosure of business description and basis of presentation [line items]
Adjustment to opening balance of retained earnings			$ 172

Recent Accounting Pronouncements - Additional Information (Detail) $ in Millions	Dec. 31, 2017 USD ($)
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Future aggregate minimum lease payments under non-cancellable operating leases	$ 1,300
Continuing operations [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Future aggregate minimum lease payments under non-cancellable operating leases	$ 400

Revenues - Summary of Revenues by Type (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ 1,311	$ 1,280	$ 2,690	$ 2,611
Eliminations [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	(2)	(2)	(4)	(3)
Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	981	944	1,990	1,899
Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	157	159	357	362
Print [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	175	179	347	353
Legal [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	882	858	1,754	1,699
Legal [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	640	613	1,277	1,217
Legal [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	79	77	155	154
Legal [member] \| Print [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	163	168	322	328
Tax & Accounting [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	359	350	796	767
Tax & Accounting [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	277	269	587	557
Tax & Accounting [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	70	70	184	185
Tax & Accounting [member] \| Print [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	12	11	25	25
Reuters News [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	72	74	144	148
Reuters News [member] \| Recurring [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	64	62	126	125
Reuters News [member] \| Transactions [member] \| Operating segments [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue	$ 8	$ 12	$ 18	$ 23

Revenues - Summary of geographical information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of geographical areas [line items]
Revenue	$ 1,311	$ 1,280	$ 2,690	$ 2,611
Eliminations [member]
Disclosure of geographical areas [line items]
Revenue	(2)	(2)	(4)	(3)
U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	997	965	2,064	2,002
Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	43	48	84	90
Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	52	55	103	107
Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1,092	1,068	2,251	2,199
U.K. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	107	100	209	191
Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	57	50	119	98
EMEA (Europe, Middle East and Africa) [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	164	150	328	289
Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	57	64	115	126
Legal [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	882	858	1,754	1,699
Legal [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	697	670	1,386	1,340
Legal [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	32	37	61	69
Legal [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	13	15	23	30
Legal [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	742	722	1,470	1,439
Legal [member] \| U.K. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	84	82	166	156
Legal [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	24	18	52	34
Legal [member] \| EMEA (Europe, Middle East and Africa) [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	108	100	218	190
Legal [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	32	36	66	70
Tax & Accounting [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	359	350	796	767
Tax & Accounting [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	281	277	641	625
Tax & Accounting [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	10	10	22	20
Tax & Accounting [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	37	38	76	73
Tax & Accounting [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	328	325	739	718
Tax & Accounting [member] \| U.K. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	16	11	29	21
Tax & Accounting [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	5	3	9	8
Tax & Accounting [member] \| EMEA (Europe, Middle East and Africa) [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	21	14	38	29
Tax & Accounting [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	10	11	19	20
Reuters News [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	72	74	144	148
Reuters News [member] \| U.S. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	19	18	37	37
Reuters News [member] \| Canada [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	1	1	1	1
Reuters News [member] \| Other [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	2	2	4	4
Reuters News [member] \| Americas [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	22	21	42	42
Reuters News [member] \| U.K. [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	7	7	14	14
Reuters News [member] \| Other Countries [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	28	29	58	56
Reuters News [member] \| EMEA (Europe, Middle East and Africa) [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	35	36	72	70
Reuters News [member] \| Asia Pacific [member] \| Operating segments [member]
Disclosure of geographical areas [line items]
Revenue	$ 15	$ 17	$ 30	$ 36

Segment Information - Summary of Operating Results of Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of operating segments [Line Items]
Revenues	$ 1,311	$ 1,280	$ 2,690	$ 2,611
Adjusted EBITDA	348	380	778	795
Fair value adjustments (see note 6)	(1)	1	(4)	6
Depreciation	(29)	(34)	(59)	(62)
Other operating gains (losses), net	14	(1)	12	12
Operating profit	204	218	472	492
Net interest expense	(81)	(89)	(159)	(181)
Other finance income (costs)	14	(60)	21	(88)
Share of post-tax earnings (losses) in equity method investments	2	(7)	4	(5)
Tax benefit (expense)	3	(15)	(24)	(26)
Earnings from continuing operations	142	47	314	192
Operating segments [member] \| Legal [member]
Disclosure of operating segments [Line Items]
Revenues	882	858	1,754	1,699
Adjusted EBITDA	321	325	640	639
Operating segments [member] \| Tax & Accounting [member]
Disclosure of operating segments [Line Items]
Revenues	359	350	796	767
Adjusted EBITDA	91	103	238	244
Operating segments [member] \| Reuters News [member]
Disclosure of operating segments [Line Items]
Revenues	72	74	144	148
Adjusted EBITDA	8	9	16	22
Corporate & other (includes reuters news) [member]
Disclosure of operating segments [Line Items]
Adjusted EBITDA	(72)	(57)	(116)	(110)
Eliminations [member]
Disclosure of operating segments [Line Items]
Revenues	(2)	(2)	(4)	(3)
Computer software [member]
Disclosure of operating segments [Line Items]
Amortization	(100)	(93)	(198)	(189)
Other identifiable intangible assets [member]
Disclosure of operating segments [Line Items]
Amortization	$ (28)	$ (35)	$ (57)	$ (70)

Seasonality - Additional Information (Detail)	6 Months Ended
Seasonality - Additional Information (Detail)	Jun. 30, 2018
Financial & risk [member]
Disclosure of seasonality [Line Items]
Percentage of ownership stake sold	55.00%

Operating Expenses - Components of Operating Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Expenses 1 [Abstract]
Salaries, commissions and allowances	$ 592	$ 550	$ 1,178	$ 1,105
Share-based payments	14	13	23	28
Post-employment benefits	34	39	72	78
Total staff costs	640	602	1,273	1,211
Goods and services	229	196	463	414
Data	59	55	112	105
Telecommunications	9	9	14	17
Real estate	26	38	50	69
Fair value adjustments	1	(1)	4	(6)
Total operating expenses	$ 964	$ 899	$ 1,916	$ 1,810

Other Operating Gains Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of Other Operating Gains [Line Items]
Other operating (losses) gains, net	$ 14	$ (1)	$ 12	$ 12
Woodbridge [member]
Disclosure of Other Operating Gains [Line Items]
Gain on sale of subsidiary	$ 16		$ 16

Finance Costs, Net - Components of Finance Costs, Net, Include Interest Expense (Income) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest expense:
Debt	$ 74	$ 81	$ 144	$ 162
Derivative financial instruments - hedging activities	2	1	3	3
Other, net	1		2	4
Fair value losses (gains) on financial instruments:
Cash flow hedges, transfer from equity	28	(37)	68	(44)
Net foreign exchange (gains) losses on debt	(28)	37	(68)	44
Net interest expense - debt and other	77	82	149	169
Net interest expense - pension and other post-employment benefit plans	7	8	14	15
Interest income	(3)	(1)	(4)	(3)
Net interest expense	$ 81	$ 89	$ 159	$ 181

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Material income and expense [abstract]
Net (gains) losses due to changes in foreign currency exchange rates	$ (5)	$ 42	$ (18)	$ 63
Net (gains) losses on derivative instruments	(9)	18	(3)	25
Other finance (income) costs	$ (14)	$ 60	$ (21)	$ 88

Taxation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure Of Income Taxes [Line Items]
Tax (benefit) expense	$ (3)	$ 15	$ 24	$ 26

- Definition

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

+ References + Details

Discontinued Operations - Additional Information (Detail) - USD ($) $ in Millions	Jan. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Disclosure of non-adjusting events after reporting period [Line Items]
Accumulated other comprehensive loss		$ (3,864)	$ (3,673)
Bottom of range [member] \| Disposal Groups Classified as Held for Sale [Member] \| Foreign currency translation adjustments [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Accumulated other comprehensive loss		(2,500)
Top of range [member] \| Disposal Groups Classified as Held for Sale [Member] \| Foreign currency translation adjustments [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Accumulated other comprehensive loss		$ (3,100)
Financial & risk [member]
Disclosure of non-adjusting events after reporting period [Line Items]
Stake to be sold	55.00%
Stake to be retained	45.00%
Expected gross proceeds from sale of stock	$ 17,000

Discontinued Operations - Summary of Earnings from Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income loss from continuing and discontinued operations [line items]
Earnings from discontinued operations, net of tax	$ 515	$ 159	$ 32	$ 328
Adjusted EBITDA	348	380	778	795
Depreciation	(29)	(34)	(59)	(62)
Other operating losses, net	14	(1)	12	12
Net interest expense	(81)	(89)	(159)	(181)
Other finance income (costs)	14	(60)	21	(88)
Computer software [member]
Income loss from continuing and discontinued operations [line items]
Amortization	100	93	198	189
Other identifiable intangible assets [member]
Income loss from continuing and discontinued operations [line items]
Amortization	28	35	57	70
Discontinued operations [member]
Income loss from continuing and discontinued operations [line items]
Revenues	1,553	1,501	3,136	2,986
Expenses	(1,022)	(1,352)	(2,220)	(2,671)
Earnings from discontinued operations before income tax	531	149	916	315
Tax (expense) benefit	(16)	10	(884)	13
Earnings from discontinued operations, net of tax	515	159	32	328
Adjusted EBITDA	472	458	998	919
Fair value adjustments	83	(54)	65	(124)
Depreciation		(43)	(14)	(87)
Other operating losses, net	(19)	(20)	(60)	(29)
Net interest expense	(2)	(6)	(6)	(7)
Other finance income (costs)	5	(31)		(30)
Intellectual Property & Science (loss) earnings from discontinued operations	(8)	5	(9)	1
Earnings from discontinued operations before income tax	$ 531	149	916	315
Discontinued operations [member] \| Computer software [member]
Income loss from continuing and discontinued operations [line items]
Amortization		(75)	(30)	(159)
Discontinued operations [member] \| Other identifiable intangible assets [member]
Income loss from continuing and discontinued operations [line items]
Amortization		$ (85)	$ (28)	$ (169)

Discontinued Operations - Summary of Earnings from Discontinued Operations (Parenthetical) (Detail) - Discontinued operations [member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Income loss from continuing and discontinued operations [line items]
Deferred tax (benefit) charge	$ (32)	$ 812
Ownership interest percentage sold	55.00%	55.00%

Discontinued Operations - Summary of Assets and Liabilities Classified as Held for Sale (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of assets and liabilities held for sale [line items]
Cash and cash equivalents	$ 879	$ 874	$ 771
Trade and other receivables	856	1,457
Prepaid expenses and other current assets	380	548
Computer hardware and other property, net	502	921
Computer software, net	910	1,458
Other identifiable intangible assets, net	3,298	5,315
Goodwill	4,984	15,042
Deferred tax	47	79
Total assets	26,975	26,480
Current indebtedness	2,595	1,644
Payables, accruals and provisions	1,037	2,086
Deferred revenue	781	937
Provisions and other non-current liabilities	1,204	1,740
Deferred tax	1,285	$ 708
Liabilities associated with assets held for sale	1,657
Disposal Groups Classified as Held for Sale [Member]
Disclosure of assets and liabilities held for sale [line items]
Cash and cash equivalents	356
Trade and other receivables	643
Other financial assets	12
Prepaid expenses and other current assets	272
Computer hardware and other property, net	436
Computer software, net	724
Other identifiable intangible assets, net	1,922
Goodwill	9,923
Other assets	140
Deferred tax	17
Total assets	14,445
Current indebtedness	1
Payables, accruals and provisions	762
Deferred revenue	193
Other financial liabilities	14
Provisions and other non-current liabilities	422
Deferred tax	265
Liabilities associated with assets held for sale	$ 1,657

Discontinued Operations - Summary of Assets and Liabilities Classified as Held for Sale (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of assets and liabilities held for sale [line items]
Cash and cash equivalents	$ 879	$ 874	$ 771
Disposal Groups Classified as Held for Sale [Member]
Disclosure of assets and liabilities held for sale [line items]
Cash and cash equivalents	356
Subsidiaries [member] \| Disposal Groups Classified as Held for Sale [Member]
Disclosure of assets and liabilities held for sale [line items]
Cash and cash equivalents	$ 109

Discontinued Operations - Summary of Disaggregation of Revenue by Type (Detail) - Discontinued operations [member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenues	$ 1,553	$ 1,501	$ 3,136	$ 2,986
Recurring [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenues	1,314	1,277	2,645	2,547
Transactions [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenues	$ 239	$ 224	$ 491	$ 439

Discontinued Operations - Summary of Disaggregation of Revenue by Geography (Detail) - Discontinued operations [member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of geographical areas [line items]
Revenues	$ 1,553	$ 1,501	$ 3,136	$ 2,986
U.S. [member]
Disclosure of geographical areas [line items]
Revenues	568	562	1,149	1,128
Canada [member]
Disclosure of geographical areas [line items]
Revenues	34	33	67	64
Other [member]
Disclosure of geographical areas [line items]
Revenues	26	25	53	51
Americas [member]
Disclosure of geographical areas [line items]
Revenues	628	620	1,269	1,243
U.K. [Member]
Disclosure of geographical areas [line items]
Revenues	232	216	472	423
Other Countries [member]
Disclosure of geographical areas [line items]
Revenues	398	376	806	747
EMEA (Europe, Middle East and Africa) [member]
Disclosure of geographical areas [line items]
Revenues	630	592	1,278	1,170
Asia Pacific [member]
Disclosure of geographical areas [line items]
Revenues	$ 295	$ 289	$ 589	$ 573

Earnings Per Share - Reconciliation of Earnings Used for Earnings per Share Calculations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings per share [abstract]
Earnings attributable to common shareholders	$ 625	$ 192	$ 286	$ 489
Less: Dividends declared on preference shares			(1)	(1)
Earnings used in consolidated earnings per share	625	192	285	488
Less: Earnings from discontinued operations, net of tax	(515)	(159)	(32)	(328)
Remove: Non-controllinginterests from discontinued operations	32	14	60	31
Earnings used in earnings per share from continuing operations	$ 142	$ 47	$ 313	$ 191

Earnings Per Share - Weighted Average Common Shares (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]
Weighted-average number of common shares outstanding	708,974,582	720,301,646	709,448,598	723,395,550
Weighted-average number of vested DSUs	699,588	708,311	767,352	692,636
Basic	709,674,170	721,009,957	710,215,950	724,088,186
Effect of stock options and TRSUs	421,224	1,494,152	581,482	1,321,292
Diluted	710,095,394	722,504,109	710,797,432	725,409,478

Financial Instruments - Summary of Financial Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	$ 879	$ 874	$ 771
Trade and other receivables	856	1,457
Other financial assets - current	48	98
Other financial assets - non-current	40	83
Current indebtedness	(2,595)	(1,644)
Trade payables	(138)	(307)
Accruals	(723)	(1,477)
Other financial liabilities - current	(1,106)	(129)
Long-term indebtedness	(4,936)	(5,382)
Other financial liabilities - non current	(211)	(279)
Total	(7,886)	(6,706)
Other other financial liabilities [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Current indebtedness		(1,644)
Trade payables		(307)
Accruals		(1,477)
Other financial liabilities - current		(80)
Long-term indebtedness		(5,382)
Other financial liabilities - non current		(2)
Total		(8,892)
Cash trade and other receivables [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents		874
Trade and other receivables		1,457
Other financial assets - current		78
Other financial assets - non-current		49
Total		2,458
Assets/ (liabilities) at fair value through earnings [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	567
Other financial assets - current	7	20
Other financial assets - non-current		1
Other financial liabilities - current	(3)	(49)
Other financial liabilities - non current		(31)
Total	571	(59)
Derivatives used for hedging [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Other financial liabilities - current	(94)
Other financial liabilities - non current	(211)	(246)
Total	(305)	(246)
Available for sale [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Other financial assets - non-current		33
Total		$ 33
Assets liabilities at amortized cost [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Cash and cash equivalents	312
Trade and other receivables	856
Other financial assets - current	41
Other financial assets - non-current	17
Current indebtedness	(2,595)
Trade payables	(138)
Accruals	(723)
Other financial liabilities - current	(1,009)
Long-term indebtedness	(4,936)
Total	(8,175)
Assets at Fair Value through Other Comprehensive Income [member]
Disclosure of Financial Assets and Liabilities [Line Items]
Other financial assets - non-current	23
Total	$ 23

Financial Instruments - Summary of Financial Assets and Liabilities (Parenthetical) (Detail) $ in Millions	Jun. 30, 2018 USD ($)
Changes in fair value of credit derivative [abstract]
Share repurchase commitment	$ 967

Financial Instruments - Additional information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Disclosure of detailed information about financial instruments [Line Items]
Restricted cash and cash equivalents	$ 20,000,000	$ 126,000,000
Commercial papers issued	1,711,000,000
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
Proceeds from borrowings	$ 370,000,000
Repayment of borrowings	$ 370,000,000
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	1.00%
Credit facility that expires on November 21, 2018 [member]
Disclosure of detailed information about financial instruments [Line Items]
Gross loan commitments	$ 1,500,000,000
Proceeds from borrowings	1,000,000,000
Repayment of borrowings	500,000,000
Term Loan Facility [Member]
Disclosure of detailed information about financial instruments [Line Items]
Gross loan commitments	$ 500,000,000
Maturity date	November 21, 2018
Term Loan Facility [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	0.875%
Revolving Credit Facility 1 [Member]
Disclosure of detailed information about financial instruments [Line Items]
Gross loan commitments	$ 1,000,000,000
Maturity date	November 21, 2018
Revolving Credit Facility 1 [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	0.875%

Financial Instruments - Summary of Information Regarding Notes Repaid (Detail) - 1.30% Notes, Due 2017 [Member] $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Disclosure of detailed information about borrowings [Line Items]
Debt instrument, principal amount	$ 550
Debt instrument, interest rate	1.30%
Debt instrument, maturity year	2017
Notes, repaid date	February 2017

Financial Instruments - Summary of Debt and Related Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Current portion	$ 2,595	$ 1,644
Long-term portion	4,936	5,382
Derivative instrument liability	305	246
Derivative instrument liability, current portion	94	0
Derivative instrument liability, Long-term portion	211	246
At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	305	246
3.369% notes, due 2019 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	94	75
3.369% notes, due 2019 [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	94	75
4.35% notes, due 2020 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	153	128
4.35% notes, due 2020 [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	153	128
3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	58	43
3.309% notes, due 2021 [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Derivative instrument liability	58	43
Primary debt instruments [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	7,531	7,026
Current portion	2,595	1,644
Long-term portion	4,936	5,382
Primary debt instruments [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	7,641	7,449
Primary debt instruments [member] \| Bank and Other [Member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	5	4
Primary debt instruments [member] \| Bank and Other [Member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	5	7
Primary debt instruments [member] \| Commercial paper [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	1,711	1,637
Primary debt instruments [member] \| Commercial paper [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	1,713	1,641
Primary debt instruments [member] \| Credit facilities [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	497
Primary debt instruments [member] \| Credit facilities [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	500
Primary debt instruments [member] \| 3.369% notes, due 2019 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	380	398
Primary debt instruments [member] \| 3.369% notes, due 2019 [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	383	405
Primary debt instruments [member] \| 4.35% notes, due 2020 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	569	597
Primary debt instruments [member] \| 4.35% notes, due 2020 [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	590	629
Primary debt instruments [member] \| 3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	417	437
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	423	450
Primary debt instruments [member] \| 4.70% notes, due 2019 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	499	499
Primary debt instruments [member] \| 4.70% notes, due 2019 [member] \| At fair value [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	509	519
Primary debt instruments [member] \| 3.95% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	349	349
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	352	361
Primary debt instruments [member] \| 4.30% notes, due 2023 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	596	597
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	610	634
Primary debt instruments [member] \| 3.85% notes, due 2024 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	447	447
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	442	459
Primary debt instruments [member] \| 3.35% notes, due 2026 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	495	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	460	497
Primary debt instruments [member] \| 4.50% notes, due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	341	341
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	321	361
Primary debt instruments [member] \| 5.50% debentures, due 2035 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Borrowings	394	394
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	416	459
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	543	607
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	$ 374	$ 420

Financial Instruments - Summary of Debt and Related Derivative Instruments (Parenthetical) (Detail) $ in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2018 CAD ($)	Dec. 31, 2017 CAD ($)
3.369% notes, due 2019 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount			$ 380	$ 500
Debt instrument, interest rate	3.369%	3.369%	3.369%	3.369%
Debt instrument, maturity year	2019	2019
Debt instrument, original currency	CAD	CAD
4.35% notes, due 2020 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount			$ 569	$ 750
Debt instrument, interest rate	4.35%	4.35%	4.35%	4.35%
Debt instrument, maturity year	2020	2020
Debt instrument, original currency	CAD	CAD
3.309% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount			$ 417	$ 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
4.70% notes, due 2019 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 499	$ 500
Debt instrument, interest rate	4.70%	4.70%	4.70%	4.70%
Debt instrument, maturity year	2019	2019
Debt instrument, original currency	USD	USD
3.95% notes, due 2021 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 349	$ 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	$ 596	$ 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	$ 447	$ 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	$ 495	$ 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	$ 341	$ 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
5.50% debentures, due 2035 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 394	$ 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	$ 490	$ 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
5.65% notes, due 2043 [member]
Disclosure of Summary of Debt and Related Derivative Instruments [Line Items]
Debt instrument, principal amount	$ 341	$ 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

Financial Instruments - Summary of Fair Value Measurements Carried at Fair Value in the Consolidated Statement of Financial Position (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Assets
Embedded derivatives		$ 12
Money market accounts	$ 567
Forward exchange contracts	7	9
Financial assets at fair value through earnings	574	21
Available for sale investments		33
Financial assets at fair value through other comprehensive income	23
Total assets	597	54
Liabilities
Embedded derivatives		(63)
Forward exchange contracts	(3)	(16)
Contingent consideration		(1)
Financial liabilities at fair value through earnings	(3)	(80)
Derivatives used for hedging	(305)	(246)
Total liabilities	(308)	(326)
Level 1 [member]
Assets
Available for sale investments		7
Financial assets at fair value through other comprehensive income	6
Total assets	6	7
Level 2 [member]
Assets
Embedded derivatives		12
Money market accounts	567
Forward exchange contracts	7	9
Financial assets at fair value through earnings	574	21
Available for sale investments		26
Financial assets at fair value through other comprehensive income	17
Total assets	591	47
Liabilities
Embedded derivatives		(63)
Forward exchange contracts	(3)	(16)
Financial liabilities at fair value through earnings	(3)	(79)
Derivatives used for hedging	(305)	(246)
Total liabilities	$ (308)	(325)
Level 3 [member]
Liabilities
Contingent consideration		(1)
Financial liabilities at fair value through earnings		(1)
Total liabilities		$ (1)

Other Non-Current Assets - Summary of Other Non-Current Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Other Noncurrent Assets [Abstract]
Net defined benefit plan surpluses	$ 18	$ 30
Cash surrender value of life insurance policies	305	302
Equity method investments	155	167
Deferred commissions	71	8
Other non-current assets	37	98
Total other non-current assets	$ 586	$ 605

Payables, Accruals and Provisions - Schedule of Payables, Accruals and Provisions (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Disclosure Of Payables Accruals And Provisions [Abstract]
Trade payables	$ 138	$ 307
Accruals	723	1,477
Provisions	100	166
Other current liabilities	76	136
Total payables, accruals and provisions	$ 1,037	$ 2,086

Provisions and Other Non-Current Liabilities - Summary of Provisions and Other Non-Current Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Disclosure of other provisions [abstract]
Net defined benefit plan obligations	$ 681	$ 984
Deferred compensation and employee incentives	140	159
Provisions	63	124
Uncertain tax positions	287	337
Other non-current liabilities	33	136
Total provisions and other non-current liabilities	$ 1,204	$ 1,740

Capital - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Disclosure of Share Capital [Line Items]
Repurchase of shares	9.1	6.7	9.1	13.5
Other financial liabilities	$ 1,106		$ 1,106		$ 129
Private Share Repurchase Agreement [member]
Disclosure of Share Capital [Line Items]
Repurchase of shares			6.0
NCIB [member]
Disclosure of Share Capital [Line Items]
Potential repurchase of common shares			35.5

Capital - Details of Share Repurchases (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of share repurchases [abstract]
Share repurchases	$ 359	$ 294	$ 359	$ 578
Shares repurchased	9.1	6.7	9.1	13.5
Share repurchases-average price per share in U.S. dollars	$ 39.54	$ 43.73	$ 39.54	$ 42.70

Capital - Summary of Dividend Declared and Paid (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of changes in unrealized fair value of available-for-sale investments [abstract]
Dividends declared per common share	$ 0.345	$ 0.345	$ 0.690	$ 0.690
Dividends declared	$ 245	$ 249	$ 490	$ 500
Dividends reinvested	(6)	(8)	(15)	(17)
Dividends paid	$ 239	$ 241	$ 475	$ 483

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure Of Other In Consolidated Statement Of Cash Flow [Abstract]
Non-cash employee benefit charges	$ 40	$ 47	$ 76	$ 88
Net (gains) losses on foreign exchange and derivative financial instruments	(12)	63	(17)	89
Other	(17)	41	(1)	34
Total	$ 11	$ 151	$ 58	$ 211

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure Of Changes In Working Capital And Other Items [Abstract]
Trade and other receivables	$ (30)	$ 11	$ 61	$ 3
Prepaid expenses and other current assets	18	5	19	7
Other financial assets	6	9	41	37
Payables, accruals and provisions	(24)	(64)	(196)	(239)
Deferred revenue	99	81	45	44
Other financial liabilities	(11)	(9)	(46)	(45)
Income taxes	18	33	(2)	8
Other	(4)	(20)	(22)	(34)
Total	$ 72	$ 46	$ (100)	$ (219)

Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure Of Changes In Working Capital And Other Items [Abstract]
Amount related to employee benefit plans	$ (6)	$ (7)	$ (14)	$ (15)

Supplemental Cash Flow Information - Details of Income Taxes Paid (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income taxes paid (refund) [abstract]
Operating activities - continuing operations	$ (8)	$ 9	$ (43)	$ (19)
Operating activities - discontinued operations	(25)	(20)	(52)	(54)
Investing activities - discontinued operations		17		17
Total income taxes (paid) received	$ (33)	$ 6	$ (95)	$ (56)

Related Party Transactions - Additional Information (Detail) - Woodbridge [member] - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Apr. 30, 2018	Jun. 30, 2018	Jun. 30, 2018
Disclosure of transactions between related parties [Line Items]
Beneficial ownership of shares			64.00%
Proceeds from sale of subsidiary	$ 16
Gain recorded on sale of subsidiaries		$ 16	$ 16