XML 47 R34.htm IDEA: XBRL DOCUMENT v3.10.0.1

Revenue - Schedule of Revenues Disaggregated by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Disaggregation Of Revenue [Line Items]
Revenues	$ 409,747	$ 341,673	$ 817,970	$ 670,736
North America
Disaggregation Of Revenue [Line Items]
Revenues	284,538	238,989	563,715	471,719
Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues	81,592	61,496	164,123	118,914
United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues	29,210	26,435	59,495	50,434
Other
Disaggregation Of Revenue [Line Items]
Revenues	14,407	14,753	30,637	29,669
Meeting Fees
Disaggregation Of Revenue [Line Items]
Revenues	192,712	175,003	382,834	339,355
Meeting Fees | North America
Disaggregation Of Revenue [Line Items]
Revenues	142,767	129,666	282,918	253,665
Meeting Fees | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues	29,402	24,798	58,482	46,764
Meeting Fees | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues	14,551	14,028	28,933	26,141
Meeting Fees | Other
Disaggregation Of Revenue [Line Items]
Revenues	5,992	6,511	12,500	12,785
Online Subscription Services
Disaggregation Of Revenue [Line Items]
Revenues	151,018	107,998	289,565	205,122
Online Subscription Services | North America
Disaggregation Of Revenue [Line Items]
Revenues	101,099	73,535	193,339	141,682
Online Subscription Services | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues	39,342	25,701	75,503	47,243
Online Subscription Services | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues	6,955	5,745	13,519	10,200
Online Subscription Services | Other
Disaggregation Of Revenue [Line Items]
Revenues	3,622	3,017	7,205	5,997
Service revenues, net
Disaggregation Of Revenue [Line Items]
Revenues	343,730	283,001	672,399	544,477
Service revenues, net | North America
Disaggregation Of Revenue [Line Items]
Revenues	243,866	203,201	476,257	395,347
Service revenues, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues	68,744	50,499	133,985	94,007
Service revenues, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues	21,506	19,773	42,452	36,341
Service revenues, net | Other
Disaggregation Of Revenue [Line Items]
Revenues	9,614	9,528	19,705	18,782
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues	66,017	58,672	145,571	126,259
Product sales and other, net | North America
Disaggregation Of Revenue [Line Items]
Revenues	40,672	35,788	87,458	76,372
Product sales and other, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues	12,848	10,997	30,138	24,907
Product sales and other, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues	7,704	6,662	17,043	14,093
Product sales and other, net | Other
Disaggregation Of Revenue [Line Items]
Revenues	$ 4,793	$ 5,225	$ 10,932	$ 10,887

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtw_NorthAmericaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtw_EuropeSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wtw_GBSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=wtw_MeetingServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=wtw_OnlineSubscriptionServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=wtw_ServicesAggregateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=wtw_ProductSalesAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: