WW International (WW) 10-Q 3 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 30, 2019	Apr. 26, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	WW
Entity Registrant Name	WEIGHT WATCHERS INTERNATIONAL INC
Entity Central Index Key	0000105319
Current Fiscal Year End Date	--12-28
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		66,998,390

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 193,358	$ 236,974
Receivables (net of allowances: March 30, 2019 - $1,601 and December 29, 2018 - $1,743)	32,104	27,247
Inventories	31,859	25,851
Prepaid income taxes	39,572	33,997
Prepaid expenses and other current assets	30,543	42,355
TOTAL CURRENT ASSETS	327,436	366,424
Property and equipment, net	51,843	52,202
Operating lease assets	148,447	0
Franchise rights acquired	752,638	751,134
Goodwill	153,172	152,519
Other intangible assets, net	57,864	57,162
Deferred income taxes	17,468	16,230
Other noncurrent assets	17,316	18,870
TOTAL ASSETS	1,526,184	1,414,541
CURRENT LIABILITIES
Portion of long-term debt due within one year	57,750	77,000
Portion of operating lease liabilities due within one year	36,125	0
Accounts payable	29,139	27,098
Salaries and wages payable	50,462	64,600
Accrued marketing and advertising	23,972	14,052
Accrued interest	35,912	28,651
Other accrued liabilities	46,599	48,218
Derivative payable	9,961	5,578
Income taxes payable	21,635	22,618
Deferred revenue	60,597	53,501
TOTAL CURRENT LIABILITIES	372,152	341,316
Long-term debt, net	1,651,952	1,669,708
Long-term operating lease liabilities	121,308	0
Deferred income taxes	189,226	190,258
Other	6,612	18,289
TOTAL LIABILITIES	2,341,250	2,219,571
Redeemable noncontrolling interest	3,868	3,913
TOTAL DEFICIT
Common stock, $0 par value; 1,000,000 shares authorized; 120,352 shares issued at March 30, 2019 and December 29, 2018	0	0
Treasury stock, at cost, 53,375 shares at March 30, 2019 and 53,396 shares at December 29, 2018	(3,174,871)	(3,175,624)
Retained earnings	2,375,903	2,382,438
Accumulated other comprehensive loss	(19,966)	(15,757)
TOTAL DEFICIT	(818,934)	(808,943)
TOTAL LIABILITIES AND TOTAL DEFICIT	$ 1,526,184	$ 1,414,541

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Statement Of Financial Position [Abstract]
Receivables, allowances	$ 1,601	$ 1,743
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	120,352,000	120,352,000
Treasury stock, shares	53,375,000	53,396,000

CONSOLIDATED STATEMENTS OF NET

CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Revenues, net	$ 363,164	$ 408,223
Cost of revenues	162,216	187,220
Gross profit	200,948	221,003
Marketing expenses	114,249	98,919
Selling, general and administrative expenses	64,802	60,011
Operating income	21,897	62,073
Interest expense	35,195	35,866
Other expense (income), net	303	(235)
(Loss) income before income taxes	(13,601)	26,442
Benefit from income taxes	(2,875)	(12,617)
Net (loss) income	(10,726)	39,059
Net loss attributable to the noncontrolling interest	39	53
Net (loss) income attributable to Weight Watchers International, Inc.	$ (10,687)	$ 39,112
(Loss) Earnings Per Share attributable to Weight Watchers International, Inc.
Basic	$ (0.16)	$ 0.60
Diluted	$ (0.16)	$ 0.56
Weighted average common shares outstanding
Basic	66,964	65,123
Diluted	66,964	69,501
Service
Revenues, net	$ 306,726	$ 328,669
Cost of revenues	128,957	139,778
Product and Other
Revenues, net	56,438	79,554
Cost of revenues	$ 33,259	$ 47,442

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (10,726)	$ 39,059
Other comprehensive (loss) gain:
Foreign currency translation gain (loss)	1,714	(3,425)
Income tax (expense) benefit on foreign currency translation gain (loss)	(435)	868
Foreign currency translation gain (loss), net of taxes	1,279	(2,557)
(Loss) gain on derivatives	(7,361)	11,167
Income tax benefit (expense) on (loss) gain on derivatives	1,867	(2,832)
(Loss) gain on derivatives, net of taxes	(5,494)	8,335
Total other comprehensive (loss) gain	(4,215)	5,778
Comprehensive (loss) income	(14,941)	44,837
Net loss attributable to the noncontrolling interest	39	53
Foreign currency translation loss, net of taxes attributable to the noncontrolling interest	6	236
Comprehensive loss attributable to the noncontrolling interest	45	289
Comprehensive (loss) income attributable to Weight Watchers International, Inc.	$ (14,896)	$ 45,126

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN TOTAL DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Redeemable Noncontrolling Interest	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning Balance at Dec. 30, 2017	$ (1,015,986)	$ 4,467	$ 0	$ (3,208,836)	$ (10,467)	$ 2,203,317
Beginning balance (in shares) at Dec. 30, 2017			118,947	54,258
Comprehensive (loss) income	45,126	(289)			6,014	39,112
Issuance of treasury stock under stock plans	3,058			$ 5,505		(2,447)
Issuance of treasury stock under stock plans (in shares)				(144)
Compensation expense on share- based awards	4,384					4,384
Issuance of common stock	9,796					9,796
Issuance of common stock (in shares)			1,405
Cumulative effect of revenue accounting change	2,933					2,933
Cumulative effect of tax accounting change	(49,412)				(2,485)	(46,927)
Ending balance at Mar. 31, 2018	(1,000,101)	4,178	$ 0	$ (3,203,331)	(6,938)	2,210,168
Ending balance (in shares) at Mar. 31, 2018			120,352	54,114
Beginning Balance at Dec. 29, 2018	(808,943)	3,913	$ 0	$ (3,175,624)	(15,757)	2,382,438
Beginning balance (in shares) at Dec. 29, 2018			120,352	53,396
Comprehensive (loss) income	(14,896)	(45)			(4,209)	(10,687)
Issuance of treasury stock under stock plans	93			$ 753		(660)
Issuance of treasury stock under stock plans (in shares)				(21)
Compensation expense on share- based awards	4,812					4,812
Ending balance at Mar. 30, 2019	$ (818,934)	$ 3,868	$ 0	$ (3,174,871)	$ (19,966)	$ 2,375,903
Ending balance (in shares) at Mar. 30, 2019			120,352	53,375

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Operating activities:
Net (loss) income	$ (10,726)	$ 39,059
Adjustments to reconcile net (loss) income to cash provided by operating activities:
Depreciation and amortization	11,405	11,154
Amortization of deferred financing costs and debt discount	2,208	1,914
Share-based compensation expense	4,812	4,384
Deferred tax benefit	(433)	(457)
Allowance for doubtful accounts	(290)	(49)
Reserve for inventory obsolescence	2,243	6,423
Foreign currency exchange rate loss (gain)	173	(367)
Changes in cash due to:
Receivables	(3,316)	(5,562)
Inventories	(8,059)	1,241
Prepaid expenses	1,105	(15,088)
Accounts payable	2,171	7,510
Accrued liabilities	(326)	(2,175)
Deferred revenue	6,925	22,932
Other long term assets and liabilities, net	272	(6,328)
Income taxes	(940)	8,868
Cash provided by operating activities	7,224	73,459
Investing activities:
Capital expenditures	(4,059)	(1,753)
Capitalized software expenditures	(7,167)	(5,966)
Other items, net	3	(24)
Cash used for investing activities	(11,223)	(7,743)
Financing activities:
Net payments on revolver	0	(25,000)
Payments on long-term debt	(38,500)	(19,250)
Taxes paid related to net share settlement of equity awards	(381)	(2,128)
Proceeds from stock options exercised	127	14,679
Other items, net	(80)	0
Cash used for financing activities	(38,834)	(31,699)
Effect of exchange rate changes on cash and cash equivalents	(783)	544
Net (decrease) increase in cash and cash equivalents	(43,616)	34,561
Cash and cash equivalents, beginning of period	236,974	83,054
Cash and cash equivalents, end of period	$ 193,358	$ 117,615

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	1. The accompanying consolidated financial statements include the accounts of Weight Watchers International, Inc. and all of its subsidiaries. The terms “Company” and “WW” as used throughout these notes are used to indicate Weight Watchers International, Inc. and all of its operations consolidated for purposes of its financial statements. The Company’s “Digital” business refers to providing subscriptions to the Company’s digital product offerings, including the Personal Coaching + Digital product. The Company’s “Studio + Digital” business refers to providing access to the Company’s weekly in-person workshops combined with the Company’s digital subscription product offerings to commitment plan subscribers. The “Studio + Digital” business also includes the provision of access to workshops for members who do not subscribe to commitment plans, including the Company’s The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and include amounts that are based on management’s best estimates and judgments. While all available information has been considered, actual amounts could differ from those estimates. The consolidated financial statements include all of the Company’s majority-owned subsidiaries. All entities acquired, and any entity of which a majority interest was acquired, are included in the consolidated financial statements from the date of acquisition. All intercompany accounts and transactions have been eliminated in consolidation. The Company’s operating results for any interim period are not necessarily indicative of future or annual results. The consolidated financial statements are unaudited and, accordingly, they do not include all of the information necessary for a comprehensive presentation of results of operations, financial position and cash flow activity required by GAAP for complete financial statements but, in the opinion of management, reflect all adjustments including those of a normal recurring nature necessary for a fair statement of the interim results presented. These statements should be read in conjunction with the Company’s Annual Report on Form 10-K for fiscal 2018 filed on February 26, 2019, which includes additional information about the Company, its results of operations, its financial position and its cash flows.

Recently Issued Accounting Stan

Recently Issued Accounting Standards	3 Months Ended
	Mar. 30, 2019
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Standards	2. For a discussion of the Company’s significant accounting policies, see “Summary of Significant Accounting Policies” in the Notes to Consolidated Financial Statements of the Company’s Annual Report on Form 10-K for fiscal 2018. For a discussion of accounting standards adopted in the current period, see Note 3.

Accounting Standards Adopted in

Accounting Standards Adopted in Current Year	3 Months Ended
	Mar. 30, 2019
Accounting Changes And Error Corrections [Abstract]
Accounting Standards Adopted in Current Year	3. In February 2016, the Financial Accounting Standards Board (the “FASB”) issued updated guidance regarding leases, requiring lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but will be updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The effective date of the new guidance for public companies is for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. In July 2018, the FASB issued updated guidance by providing an entity with an additional and optional transition method to adopt the new lease guidance. On December 30, 2018, the Company adopted the updated lease guidance on a modified retrospective basis as of the adoption date. Periods prior to the adoption date continue to be reported under the historical lease accounting guidance. See Note 4 for further details.

Leases

Leases	3 Months Ended
	Mar. 30, 2019
Leases [Abstract]
Leases	4. Leases Adoption of Lease Standard On December 30, 2018, the Company adopted the updated guidance on leases using the modified retrospective transition method. Results for reporting periods beginning on or after December 30, 2018 are presented under the updated guidance, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historical lease accounting. The adoption of the standard had a material impact on the Company’s consolidated balance sheets but did not have a material impact on its consolidated statements of net income. The Company recorded $158,773 as a right of use asset, $167,081 of lease liabilities and $0 for retained earnings for operating leases upon adoption of the updated guidance. The standard did not have a material impact on the Company’s finance lease contracts. A lease is defined as an arrangement that contractually specifies the right to use and control an identified asset for a specific period of time in exchange for consideration. Operating leases are included in operating lease assets, portion of operating lease liabilities due within one year, and long-term operating lease liabilities in the Company’s 2019 consolidated balance sheet. Finance leases are included in property and equipment, net, other accrued liabilities, and other long-term liabilities in the Company’s 2019 consolidated balance sheet L The Company’s operating and finance leases are primarily for its studio locations, corporate offices, data centers and certain equipment, including automobiles. At March 30, 2019, the Company’s lease assets and lease liabilities were as follows: March 30, 2019 Assets: Operating lease assets $ 148,447 Finance lease assets 573 Total leased assets $ 149,020 Liabilities: Current Operating $ 36,125 Finance 376 Noncurrent Operating $ 121,308 Finance 107 Total lease liabilities $ 157,916 For the three months ended March 30, 2019, the components of the Company’s lease expense were as follows: Three Months Ended March 30, 2019 Operating lease cost $ 13,372 Finance lease cost: Amortization of leased assets 80 Interest on lease liabilities 8 Total finance lease cost $ 88 Total lease cost $ 13,460 At March 30, 2019, the Company’s weighted average remaining lease term and weighted average discount rates were as follows: March 30, 2019 Weighted Average Remaining Lease Term (years) Operating leases 7.47 Finance leases 1.21 Weighted Average Discount Rate Operating leases 7.03 Finance leases 4.74 The Company’s leases have remaining lease terms of 0 to 14 years with a weighted average lease term of 7.45 years. At March 30, 2019, the maturity of the Company’s lease liabilities in each of the next five fiscal years and thereafter were as follows: Operating Leases Finance Leases Total Remainder of fiscal 2019 $ 35,516 $ 360 $ 35,876 2020 36,625 110 36,735 2021 27,812 27 27,839 2022 18,965 — 18,965 2023 14,252 — 14,252 Thereafter 75,909 — 75,909 Total lease payments $ 209,079 $ 497 $ 209,576 Less imputed interest 51,646 14 51,660 Present value of lease liabilities $ 157,433 $ 483 $ 157,916 Minimum commitments under non-cancelable obligations, primarily for office and rental facilities operating leases at December 29, 2018, consisted of the following: 2019 $ 63,261 2020 38,491 2021 22,341 2022 14,017 2023 9,192 2024 and thereafter 37,704 Total $ 185,006 Total rent expense charged to operations for office and rental facilities under these operating leases for the three months ended March 31, 2018 was $10,791. Supplemental cash flow information related to leases for the three months ended March 30, 2019 were as follows: Three Months Ended March 30, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 12,742 Operating cash flows from finance leases $ 8 Financing cash flows from finance leases $ 80 Leased assets obtained in exchange for new operating lease liabilities $ 887 Leased assets obtained in exchange for new finance lease liabilities $ — Practical Expedients and Accounting Policy Elections The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which allowed the Company not to reassess whether any expired or existing contracts contained leases, to carry forward existing lease classifications and not to reassess initial direct costs for existing leases. In addition, the Company elected the benefit of hindsight practical expedient in determining the lease term for existing leases upon adoption of the updated guidance. The Company has lease agreements with lease and non-lease components and has elected the practical expedient not to separate non-lease components from lease components and instead to account for each separate lease component and non-lease component as a single lease component. The Company has elected the short-term lease exception accounting policy, whereby the recognition requirements of the updated guidance is not applied and lease expense is recorded on a straight-line basis with respect to leases with an initial term of 12 months or less.

Revenue

Revenue	3 Months Ended
	Mar. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue	5 . Revenue Adoption of Revenue from Contracts with Customers On December 31, 2017, the Company adopted the updated guidance on revenue from contracts with customers using the modified retrospective method applied to those contracts which were not completed as of December 31, 2017. Results for reporting periods beginning after December 31, 2017 are presented under the updated guidance, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historical revenue accounting. The Company recorded a net increase to opening retained earnings of $2,145 as of December 31, 2017 due to the cumulative impact of adopting the updated guidance, inclusive of a $3,501 decrease to deferred revenue, a decrease of $568 to prepaid expenses and other current assets and an increase to the deferred income tax liability of $788. Revenue Recognition Revenues are recognized when control of the promised services or goods is transferred to the Company’s customers, in an amount that reflects the consideration it expects to be entitled to in exchange for those services or goods. The Company earns revenue from subscriptions for its digital products and by conducting workshops, for which it charges a fee, predominantly through commitment plans, prepayment plans or the “pay-as-you-go” arrangement. The Company also earns revenue by selling consumer products (including publications) in its workshops, online through its ecommerce platform and to its franchisees, collecting commissions from franchisees, collecting royalties related to licensing agreements, selling magazine subscriptions, publishing, selling advertising space on its websites and in copies of its publications and By Mail product sales. Commitment plan revenues, prepaid workshop fees and magazine subscription revenue are recorded to deferred revenue and amortized into revenue as control is transferred over the period earned since these performance obligations are satisfied over time. Digital subscription revenues, consisting of the fees associated with subscriptions for the Company’s Digital products, including its Personal Coaching + Digital product, are deferred and recognized on a straight-line basis as control is transferred over the subscription period. One-time Digital sign-up fees are considered immaterial in the context of the contract and the related revenue is recorded to deferred revenue and amortized into revenue over the commitment period. In the Studio + Digital business, the Company generally charges non-refundable registration and starter fees in exchange for access to the Company’s digital subscription products, an introductory information session and materials it provides to new members. Revenue from these registration and starter fees is considered immaterial in the context of the contract and is recorded to deferred revenue and amortized into revenue over the commitment period. Revenue from “pay-as-you-go” workshop fees, consumer product sales and By Mail, commissions and royalties is recognized at the point in time control is transferred, which is when services are rendered, products are shipped to customers and title and risk of loss passes to the customers, and commissions and royalties are earned, respectively. Revenue from advertising in magazines is recognized when advertisements are published. Revenue from magazine sales is recognized when the magazine is sent to the customer. For revenue transactions that involve multiple performance obligations, the amount of revenue recognized is determined using the relative fair value approach, which is generally based on each performance obligation’s stand-alone selling price. Discounts to customers, including free registration offers, are recorded as a deduction from gross revenue in the period such revenue was recognized. Revenue from advertising on its websites is recognized when the advertisement is viewed by the user. The Company grants refunds in aggregate amounts that historically have not been material. Because the period of payment of the refund generally approximates the period revenue was originally recognized, refunds are recorded as a reduction of revenue over the same period. The following table presents the Company’s revenues disaggregated by revenue source: Three Months Ended March 30, March 31, 2019 2018 Digital Subscription Revenues $ 148,855 $ 138,547 Studio + Digital Fees 157,871 190,122 Service Revenues, net $ 306,726 $ 328,669 Product sales and other, net 56,438 79,554 Revenues, net $ 363,164 $ 408,223 The following tables present the Company’s revenues disaggregated by segment: Three Months Ended March 30, 2019 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 98,760 $ 40,183 $ 6,418 $ 3,494 $ 148,855 Studio + Digital Fees 117,599 23,949 11,263 5,060 157,871 Service Revenues, net $ 216,359 $ 64,132 $ 17,681 $ 8,554 $ 306,726 Product sales and other, net 33,652 12,025 6,930 3,831 56,438 Revenues, net $ 250,011 $ 76,157 $ 24,611 $ 12,385 $ 363,164 Three Months Ended March 31, 2018 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 92,240 $ 36,161 $ 6,563 $ 3,583 $ 138,547 Studio + Digital Fees 140,152 29,080 14,382 6,508 190,122 Service Revenues, net $ 232,392 $ 65,241 $ 20,945 $ 10,091 $ 328,669 Product sales and other, net 46,787 17,290 9,339 6,138 79,554 Revenues, net $ 279,179 $ 82,531 $ 30,284 $ 16,229 $ 408,223 Information about Contract Balances For Service Revenues, the Company typically collects payment in advance of providing services. Any amounts collected in advance of services being provided are recorded in deferred revenue. In the case where amounts are not collected, but the service has been provided and the revenue has been recognized, the amounts are recorded in accounts receivable. The opening and ending balances of the Company’s deferred revenues are as follows: Deferred Deferred Revenue Revenue-Long Term Balance as of December 29, 2018 $ 53,501 $ 961 Net increase (decrease) during the period 7,096 (267 ) Balance as of March 30, 2019 $ 60,597 $ 694 Revenue recognized from amounts included in current deferred revenue as of December 29, 2018 was $47,869 for the first quarter ended March 30, 2019. The Company’s long-term deferred revenue, which is included in other liabilities on the Company’s consolidated balance sheet, had a balance of $694 at March 30, 2019 related to upfront payments received as an inducement for entering into certain sales-based royalty agreements with third party licensees. This revenue is amortized on a straight-line basis over the term of the agreements. Practical Expedients and Exemptions The Company elected to apply the updated guidance only to contracts that were not completed as of December 31, 2017, the date of adoption. The Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less. The Company expenses sales commissions when incurred (amortization period would have been one year or less) and these expenses are recorded within selling, general and administrative expenses. The Company treats shipping and handling fees as fulfillment costs and not as a separate performance obligation, and as a result, any fees received from

Franchise Rights Acquired, Good

Franchise Rights Acquired, Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Franchise Rights Acquired, Goodwill and Other Intangible Assets	6 . Franchise Rights Acquired, Goodwill and Other Intangible Assets Franchise rights acquired are due to acquisitions of the Company’s franchised territories as well as the acquisition of franchise promotion agreements and other factors associated with the acquired franchise territories. For the three months ended March 30, 2019, the change in the carrying value of franchise rights acquired is due to the effect of exchange rate changes. Goodwill primarily relates to the acquisition of the Company by The Kraft Heinz Company (successor to H.J. Heinz Company) in 1978 and the Company’s acquisitions of WW.com, Inc. (formerly known as WeightWatchers.com, Inc.) in 2005, the Company’s franchised territories and the majority interest in Vigilantes do Peso Marketing Ltda. For the three months ended March 30, 2019, the change in the carrying amount of goodwill was due to the effect of exchange rate changes as follows: North Continental United America Europe Kingdom Other Total Balance as of December 29, 2018 $ 138,156 $ 7,242 $ 1,178 $ 5,943 $ 152,519 Effect of exchange rate changes 852 (195 ) 31 (35 ) 653 Balance as of March 30, 2019 $ 139,008 $ 7,047 $ 1,209 $ 5,908 $ 153,172 Finite-lived Intangible Assets The carrying values of finite-lived intangible assets as of March 30, 2019 and December 29, 2018 were as follows: March 30, 2019 December 29, 2018 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Amount Amortization Capitalized software costs $ 125,356 $ 105,221 $ 121,508 $ 102,659 Website development costs 109,704 82,333 105,710 77,825 Trademarks 11,694 11,063 11,620 11,010 Other 13,985 4,258 13,967 4,149 Trademarks and other intangible assets $ 260,739 $ 202,875 $ 252,805 $ 195,643 Franchise rights acquired 8,098 4,378 8,110 4,319 Total finite-lived intangible assets $ 268,837 $ 207,253 $ 260,915 $ 199,962 Aggregate amortization expense for finite-lived intangible assets was recorded in the amounts of $7,556 and $7,410 for the three months ended March 30, 2019 and March 31, 2018, respectively. Estimated amortization expense of existing finite-lived intangible assets for the next five fiscal years and thereafter is as follows: Remainder of fiscal 2019 $ 18,841 Fiscal 2020 $ 19,365 Fiscal 2021 $ 10,537 Fiscal 2022 $ 2,041 Fiscal 2023 and thereafter $ 10,800

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	7 . The components of the Company’s long-term debt were as follows: March 30, 2019 December 29, 2018 Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) Revolving Credit Facility due November 29, 2022 $ 0 $ 0 $ 0 0.00 % $ 0 $ 0 $ 0 4.39 % Term Loan Facility due November 29, 2024 1,443,750 7,957 24,933 8.14 % 1,482,250 8,307 26,033 7.53 % Notes due December 1, 2025 300,000 1,158 0 8.62 % 300,000 1,202 0 8.69 % Total $ 1,743,750 $ 9,115 $ 24,933 8.22 % $ 1,782,250 $ 9,509 $ 26,033 7.63 % Less: Current Portion 57,750 77,000 Unamortized Deferred Financing Costs 9,115 9,509 Unamortized Debt Discount 24,933 26,033 Total Long-Term Debt $ 1,651,952 $ 1,669,708 (1) Includes amortization of deferred financing costs and debt discount. On November 29, 2017, the Company refinanced its then-existing credit facilities (hereinafter referred to as “the November 2017 debt refinancing”) consisting of $1,930,386 of borrowings under a term loan facility and an undrawn $50,000 revolving credit facility with $1,565,000 of borrowings under its new credit facilities, consisting of a $1,540,000 term loan facility, and a $150,000 revolving credit facility (of which $25,000 was drawn upon at the time of the November 2017 debt refinancing) (collectively, the “Credit Facilities”), and $300,000 in aggregate principal amount of 8.625% Senior Notes due 2025 (the “Notes”). During the fourth quarter of fiscal 2017, t Senior Secured Credit Facilities The Credit Facilities were issued under a new credit agreement, dated November 29, 2017 (the “Credit Agreement”), among the Company, as borrower, the lenders party thereto, JPMorgan Chase Bank, N.A. (“JPMorgan Chase”), as administrative agent and an issuing bank, Bank of America, N.A., as an issuing bank, and Citibank, N.A., as an issuing bank. The Credit Facilities consist of (1) $1,540,000 in aggregate principal amount of senior secured tranche B term loans due in 2024 (the “Term Loan Facility”) and (2) a $150,000 senior secured revolving credit facility (which includes borrowing capacity available for letters of credit) due in 2022 (the “Revolving Credit Facility”). As of March 30, 2019, the Company had $1,443,750 of debt outstanding under the Credit Facilities, with $148,841 of availability and $1,159 in issued but undrawn letters of credit outstanding under the Revolving Credit Facility. There was no outstanding balance under the Revolving Credit Facility as of March 30, 2019. All obligations under the Credit Agreement are guaranteed by, subject to certain exceptions, each of the Company’s current and future wholly-owned material domestic restricted subsidiaries. All obligations under the Credit Agreement, and the guarantees of those obligations, are secured by substantially all of the assets of the Company and each guarantor, subject to customary exceptions, including: • a pledge of 100% of the equity interests directly held by the Company and each guarantor in any wholly-owned domestic material subsidiary of the Company or any guarantor (which pledge, in the case of any non-U.S. subsidiary of a U.S. subsidiary, will not include more than 65% of the voting stock of such first-tier non-U.S. subsidiary), subject to certain exceptions; and • a security interest in substantially all other tangible and intangible assets of the Company and each guarantor, subject to certain exceptions. Under the terms of the Credit Agreement, depending on the Company’s Consolidated First Lien Net Debt Leverage Ratio (as used in the Credit Agreement), on an annual basis on or about the time the Company is required to deliver its financial statements for any fiscal year, the Company is obligated to offer to prepay a portion of the outstanding principal amount of the Term Loan Facility in an aggregate amount determined by a percentage of its annual excess cash flow (as defined in the Credit Agreement) (said payment, a “Cash Flow Sweep”). Borrowings under the Term Loan Facility bear interest at a rate per annum equal to, at the Company’s option, either (1) an applicable margin plus a base rate determined by reference to the highest of (a) 0.50% per annum plus the higher of (i) the Federal Funds Effective Rate and (ii) the Overnight Bank Funding Rate as determined by the Federal Reserve Bank of New York, (b) the prime rate of JPMorgan Chase and (c) the LIBOR rate determined by reference to the cost of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00%; provided that such rate is not lower than a floor of 1.75% or (2) an applicable margin plus a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, provided that LIBOR is not lower than a floor of 0.75%. Borrowings under the Revolving Credit Facility bear interest at a rate per annum equal to an applicable margin based upon a leverage-based pricing grid, plus, at the Company’s option, either (1) a base rate determined by reference to the highest of (a) 0.50% per annum plus the higher of (i) the Federal Funds Effective Rate and (ii) the Overnight Bank Funding Rate as determined by the Federal Reserve Bank of New York, (b) the prime rate of JPMorgan Chase and (c) the LIBOR rate determined by reference to the cost of funds for U.S. dollar deposits for an interest period of one month adjusted for certain additional costs, plus 1.00% or (2) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs. As of March 30, 2019, the applicable margins for the LIBOR rate borrowings under the Term Loan Facility and the Revolving Credit Facility were 4.75% and 2.00%, respectively. On a quarterly basis, the Company pays a commitment fee to the lenders under the Revolving Credit Facility in respect of unutilized commitments thereunder, which commitment fee fluctuates depending upon the Company’s Consolidated First Lien Net Debt Leverage Ratio. Based on the Company’s Consolidated First Lien Net Debt Leverage Ratio as of March 30, 2019, the commitment fee was 0.25% per annum. The Company’s Consolidated First Lien Net Debt Leverage Ratio as of March 30, 2019 was 2.91 :1.00. The Credit Agreement contains other customary terms, including (1) representations, warranties and affirmative covenants, (2) negative covenants, including limitations on indebtedness, liens, mergers, acquisitions, asset sales, investments, distributions, prepayments of subordinated debt, amendments of material agreements governing subordinated indebtedness, changes to lines of business and transactions with affiliates, in each case subject to baskets, thresholds and other exceptions, and (3) customary events of default. The availability of certain baskets and the ability to enter into certain transactions are also subject to compliance with certain financial ratios. In addition, the Revolving Credit Facility includes a maintenance covenant that will require, in certain circumstances, compliance with certain first lien secured net leverage ratios. As of March 30, 2019, the Company was in compliance with all applicable financial covenants in the Credit Agreement governing the Credit Facilities. Senior Notes The Notes were issued pursuant to an Indenture, dated as of November 29, 2017 (the “Indenture”), among the Company, the guarantors named therein and The Bank of New York Mellon, as trustee. The Indenture contains customary covenants, events of default and other provisions for an issuer of non-investment grade debt securities. These covenants include limitations on indebtedness, liens, mergers, acquisitions, asset sales, investments, distributions, prepayments of subordinated debt and transactions with affiliates, in each case subject to baskets, thresholds and other exceptions. The Notes accrue interest at a rate per annum equal to 8.625% and are due on December 1, 2025. Interest on the Notes is payable semi-annually on June 1 and December 1 of each year, beginning on June 1, 2018. On or after December 1, 2020, the Company may on any one or more occasions redeem some or all of the Notes at a purchase price equal to 104.313% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to, but not including, the redemption date, such optional redemption price decreasing to 102.156% on or after December 1, 2021 and to 100.000% on or after December 1, 2022. Prior to December 1, 2020, the Company may on any one or more occasions redeem up to 40% of the aggregate principal amount of the Notes with an amount not to exceed the net proceeds of certain equity offerings at 108.625% of the aggregate principal amount thereof, plus accrued and unpaid interest, if any, to, but not including, the redemption date. Prior to December 1, 2020, the Company may redeem some or all of the Notes at a make-whole price plus accrued and unpaid interest, if any, to, but not including, the redemption date. If a change of control occurs, the Company must offer to purchase for cash the Notes at a purchase price equal to 101% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to, but not including, the purchase date. Following the sale of certain assets and subject to certain conditions, the Company must offer to purchase for cash the Notes at a purchase price equal to 100% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to, but not including, the purchase date. The Notes are guaranteed on a senior unsecured basis by the Company’s subsidiaries that guarantee the Credit Facilities. Outstanding Debt At March 30, 2019, the Company had $1,743,750 outstanding under the Credit Facilities and the Notes, consisting of the Term Loan Facility of $1,443,750, $0 drawn down on the Revolving Credit Facility and $300,000 in aggregate principal amount of Notes issued and outstanding. At March 30, 2019 and December 29, 2018, the Company’s debt consisted of both fixed and variable-rate instruments. An interest rate swap was entered into to hedge a portion of the cash flow exposure associated with the Company’s variable-rate borrowings. See Note 12 for information on the Company’s interest rate swap. The weighted average interest rate (which includes amortization of deferred financing costs and debt discount) on the Company’s outstanding debt, exclusive of the impact of the swap, was approximately 8.22% and 7.73% per annum based on interest rates at March 30, 2019 and December 29, 2018, respectively. The weighted average interest rate (which includes amortization of deferred financing costs and debt discount) on the Company’s outstanding debt, including the impact of the swap, was approximately 7.50% and 7.46% per annum based on interest rates at March 30, 2019 and December 29, 2018, respectively.

(Loss) Earnings Per Share

(Loss) Earnings Per Share	3 Months Ended
	Mar. 30, 2019
Earnings Per Share [Abstract]
(Loss) Earnings Per Share	8 . Basic earnings per share (“EPS”) are calculated utilizing the weighted average number of common shares outstanding during the periods presented. Diluted EPS is calculated utilizing the weighted average number of common shares outstanding during the periods presented adjusted for the effect of dilutive common stock equivalents. The following table sets forth the computation of basic and diluted (loss) earnings per share: Three Months Ended March 30, March 31, 2019 2018 Numerator: Net (loss) income attributable to Weight Watchers International, Inc. $ (10,687 ) $ 39,112 Denominator: Weighted average shares of common stock outstanding 66,964 65,123 Effect of dilutive common stock equivalents — 4,378 Weighted average diluted common shares outstanding 66,964 69,501 (Loss) earnings per share attributable to Weight Watchers International, Inc. Basic $ (0.16 ) $ 0.60 Diluted $ (0.16 ) $ 0.56 The number of anti-dilutive common stock equivalents excluded from the calculation of the weighted average number of common shares for diluted EPS was 4,223 and 594 for the three months ended March 30, 2019 and March 31, 2018, respectively.

Stock Plans

Stock Plans	3 Months Ended
	Mar. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Plans	9 . On May 6, 2008 and May 12, 2004, respectively, the Company’s shareholders approved the 2008 Stock Incentive Plan (the “2008 Plan”) and the 2004 Stock Incentive Plan (the “2004 Plan”). On May 6, 2014, the Company’s shareholders approved the 2014 Stock Incentive Plan (as amended and restated, the “2014 Plan”, and together with the 2004 Plan and the 2008 Plan, the “Stock Plans”), which replaced the 2008 Plan and 2004 Plan for all equity-based awards granted on or after May 6, 2014. The 2014 Plan is designed to promote the long-term financial interests and growth of the Company by attracting, motivating and retaining employees with the ability to contribute to the success of the business and to align compensation for the Company’s employees over a multi-year period directly with the interests of the shareholders of the Company. The Company’s long-term equity incentive compensation program has historically included time-vesting non-qualified stock option and/or restricted stock unit (including performance-based stock unit with both time- and performance-vesting criteria (“PSUs”)) awards. The Company’s Board of Directors or a committee thereof administers the 2014 Plan. In fiscal 2018, the Company granted 81.3 PSUs in May 2018 having both time- and performance-vesting criteria. The time-vesting criteria for these PSUs will be satisfied upon continued employment (with limited exceptions) on the third anniversary of the grant date (i.e., May 15, 2021). The performance-vesting criteria for these PSUs will be satisfied if the Company has achieved a certain annual operating income objective for the performance period of fiscal 2020. Pursuant to these awards, the number of PSUs that become vested, if any, upon the satisfaction of both vesting criteria, shall be equal to (x) the target number of PSUs granted multiplied by (y) the applicable achievement percentage, rounded down to avoid the issuance of fractional shares. The applicable achievement percentage shall increase in the event the Company has achieved a certain revenue target during such performance period. The Company is currently accruing compensation expense to what it believes is the probable outcome upon vesting. In fiscal 2017, the Company granted 98.5 PSUs in May 2017 and 47.9 PSUs in July 2017, all having both time- and performance-vesting criteria. The time-vesting criteria for these PSUs will be satisfied upon continued employment (with limited exceptions) on May 15, 2020. The performance-vesting criteria for these PSUs will be satisfied if the Company has achieved, in the case of the May 2017 awards, certain annual operating income objectives and, in the case of the July 2017 award, certain net income or operating income objectives, as applicable, for each performance year, in each fiscal year over a three-year period (i.e., fiscal 2017 through fiscal 2019) (each, a “2017 Award Performance Year”). When the performance measure has been met for a particular 2017 Award Performance Year, that portion of units is “banked” for potential issuance following the satisfaction of the time-vesting criteria. Such portion of units to be “banked” shall be equal to (x) the target number of PSUs granted for the applicable 2017 Award Performance Year multiplied by (y) the applicable achievement percentage, rounded down to avoid the issuance of fractional shares. The Company is currently accruing compensation expense to what it believes is the probable outcome upon vesting. In fiscal 2016, the Company granted 289.9 PSUs having both time- and performance-vesting criteria. The time-vesting criteria for these PSUs will be satisfied upon continued employment (with limited exceptions) on the third anniversary of the grant date (i.e., May 16, 2019). The performance-vesting criteria for these PSUs was satisfied when the Company achieved a Debt Ratio (as defined in the applicable term sheet for these PSU awards and based on a Debt to EBITDAS ratio (each, as defined therein)) at levels at or below 4.5x over the performance period from December 31, 2017 to December 29, 2018. Pursuant to these awards, the number of PSUs that become vested, if any, upon the satisfaction of the time-vesting criteria, shall be equal to (x) the target number of PSUs granted multiplied by (y) 166.67%, the applicable Debt Ratio achievement percentage, rounded down to avoid the issuance of fractional shares. The Company is currently accruing compensation expense to what it believes is the probable outcome upon vesting.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	1 0 . The effective tax rates for the three months ended March 30, 2019 and March 31, 2018 were 21.1% and (47.7%), respectively. For the three months ended March 30, 2019, the primary difference between the U.S. federal statutory tax rate and the Company’s consolidated effective tax rate was due to $1,462 of higher state income tax expenses versus the prior year period and a $856 tax expense related to global intangible low-taxed income (“GILTI”) oreign-derived intangible income (“FDII”) The differences between the U.S. federal statutory tax rate and the Company’s consolidated effective tax rate were as follows: Three Months Ended March 30, March 31, 2019 2018 U.S. federal statutory tax rate 21.0 % 21.0 % State income taxes (net of federal benefit) (10.8 %) 2.9 % Cessation of operations 0.0 % (7.0 %) Research and development credit 2.3 % (1.6 %) Tax windfall on share-based awards 0.0 % (68.5 %) GILTI (6.3 %) 0.0 % FDII 4.8 % 0.0 % Section 162(m) limitation (1.4 %) 1.0 % Increase in valuation allowance due to net operating loss (2.2 %) 1.6 % Impact of foreign operations 3.9 % 1.0 % Other 9.8 % 1.9 % Total effective tax rate 21.1 % (47.7 %)

Legal

Legal	3 Months Ended
	Mar. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Legal	1 1. Securities Class Action Matters In March 2019, two substantially identical class action complaints alleging violations of the federal securities laws were filed by individual shareholders against the Company, certain of the Company’s current officers and the Company’s former controlling shareholder, Artal Group S.A., in the United States District Court for the Southern District of New York. One complaint was filed on behalf of all purchasers of the Company’s common stock and the other on behalf of all purchasers of the Company’s securities, between May 4, 2018 and February 26, 2019, inclusive (the “Class Period”). The complaints allege that, during the Class Period, the defendants disseminated materially false and misleading statements and/or concealed or recklessly disregarded material adverse facts. The complaints allege claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as On March 26, 2019, the Company received a shareholder litigation demand letter alleging breaches of fiduciary duties by certain current and former Company directors and executive officers, to the alleged injury of the Company. The allegations in the letter relate to those contained in the ongoing securities class action litigation. In response to the letter, pursuant to Virginia law, the Board of Directors is creating a special committee to review and evaluate the facts and circumstances surrounding the claims made in the demand letter. Other Litigation Matters Due to the nature of the Company’s activities, it is also, at times, subject to other pending and threatened legal actions, including patent and other intellectual property actions, that arise out of the ordinary course of business. In the opinion of management, the disposition of any such matters is not expected, individually or in the aggregate, to have a material adverse effect on the Company’s results of operations, financial condition or cash flows. However, the results of legal actions cannot be predicted with certainty. Therefore, it is possible that the Company’s results of operations, financial condition or cash flows could be materially adversely affected in any particular period by the unfavorable resolution of one or more legal actions.

Derivative Instruments and Hedg

Derivative Instruments and Hedging	3 Months Ended
	Mar. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging	1 2 . As of March 30, 2019 and December 29, 2018, the Company had in effect an interest rate swap with a notional amount totaling $1,250,000. On July 26, 2013, in order to hedge a portion of its variable rate debt, the Company entered into a forward-starting interest rate swap with an effective date of March 31, 2014 and a termination date of April 2, 2020. The initial notional amount of this swap was $1,500,000. During the term of this swap, the notional amount decreased from $1,500,000 effective March 31, 2014 to $1,250,000 on April 3, 2017, and will decrease to $1,000,000 on April 1, 2019. This interest rate swap effectively fixes the variable interest rate on the notional amount of this swap at 2.41%. This swap qualifies for hedge accounting and, therefore, changes in the fair value of this swap have been recorded in accumulated other comprehensive loss. On June 11, 2018, in order to hedge a portion of its variable rate debt, the Company entered into a forward-starting interest rate swap (hereinafter referred to as “future swap”) with an effective date of April 2, 2020 and a termination date of March 31, 2024. The initial notional amount of this swap is $500,000. During the term of this swap, the notional amount will decrease from $500,000 effective April 2, 2020 to $250,000 on March 31, 2021. This interest rate swap effectively fixes the variable interest rate on the notional amount of this swap at 3.1005%. This swap qualifies for hedge accounting and, therefore, changes in the fair value of this swap have been recorded in accumulated other comprehensive loss. As of March 30, 2019 and December 29, 2018, cumulative unrealized losses for qualifying hedges were reported as a component of accumulated other comprehensive loss in the amounts of $6,669 ($8,995 before taxes) and $1,175 ($1,634 before taxes), respectively. As of March 30, 2019, the fair value of the Company’s currently effective swap was a current asset of $2,229, which is included in other current assets in the consolidated balance sheet. As of March 30, 2019, the fair value of the Company’s future swap was a liability of $9,961, which is included in derivative payable in the consolidated balance sheet. As of December 29, 2018, the fair value of the Company’s currently effective swap included a current asset of $3,526 and a noncurrent asset of $398, which are included in other current assets and other noncurrent assets, respectively, in the consolidated balance sheet. As of December 29, 2018, the fair value of the Company’s future swap was a liability of $5,578, which is included in derivative payable in the consolidated balance sheet. The Company is hedging forecasted transactions for periods not exceeding the next five years. The Company expects approximately $690 ($925 before taxes) of derivative gains included in accumulated other comprehensive loss at March 30, 2019, based on current market rates, will be reclassified into earnings within the next 12 months.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	1 3 . Accounting guidance on fair value measurements for certain financial assets and liabilities requires that assets and liabilities carried at fair value be classified and disclosed in one of the following three categories: • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. When measuring fair value, the Company is required to maximize the use of observable inputs and minimize the use of unobservable inputs. Fair Value of Financial Instruments The Company’s significant financial instruments include long-term debt and interest rate swap agreements as of March 30, 2019 and December 29, 2018. The fair value of the Company’s borrowings under the Revolving Credit Facility approximated a carrying value of $0 at March 30, 2019 and December 29, 2018, respectively, due to the nature of the debt (Level 2 input). The fair value of the Company’s Credit Facilities is determined by utilizing average bid prices on or near the end of each fiscal quarter (Level 2 input). As of March 30, 2019 and December 29, 2018, the fair value of the Company’s long-term debt was approximately $1,628,502 and $1,757,717, respectively, as compared to the carrying value (net of deferred financing costs and debt discount) of $1,709,702 and $1,746,708, respectively. Derivative Financial Instruments The fair values for the Company’s derivative financial instruments are determined using observable current market information such as the prevailing LIBOR interest rate and LIBOR yield curve rates and include consideration of counterparty credit risk. See Note 12 for disclosures related to derivative financial instruments. The following table presents the aggregate fair value of the Company’s derivative financial instruments: The Company did not have any transfers into or out of Levels 1 and 2, and did not maintain any assets or liabilities classified as Level 3, during the three months ended March 30, 2019 and the fiscal year ended December 29, 2018. Fair Value Measurements Using: Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Interest rate swap asset at March 30, 2019 $ 2,229 $ 0 $ 2,229 $ 0 Interest rate swap liability at March 30, 2019 $ 9,961 $ 0 $ 9,961 $ 0 Interest rate swap asset at December 29, 2018 $ 3,924 $ 0 $ 3,924 $ 0 Interest rate swap liability at December 29, 2018 $ 5,578 $ 0 $ 5,578 $ 0

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 30, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	1 4 . Amounts reclassified out of accumulated other comprehensive loss are as follows: Changes in Accumulated Other Comprehensive Loss by Component (a) Three Months Ended March 30, 2019 Loss on Qualifying Hedges Loss on Foreign Currency Translation Total Beginning Balance at December 29, 2018 $ (1,175 ) $ (14,582 ) $ (15,757 ) Other comprehensive (loss) income before reclassifications, net of tax (4,552 ) 1,279 (3,273 ) Amounts reclassified from accumulated other comprehensive loss, net of tax (b) (942 ) 0 (942 ) Net current period other comprehensive (loss) income including noncontrolling interest (5,494 ) 1,279 (4,215 ) Less: net current period other comprehensive loss attributable to the noncontrolling interest 0 6 6 Ending Balance at March 30, 2019 $ (6,669 ) $ (13,297 ) $ (19,966 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Three months ended March 31, 2018 (Loss) Gain on Qualifying Hedges Loss on Foreign Currency Translation Total Beginning Balance at December 30, 2017 $ (5,392 ) $ (5,075 ) $ (10,467 ) Other comprehensive income (loss) before reclassifications, net of tax 6,651 (2,557 ) 4,094 Amounts reclassified from accumulated other comprehensive loss, net of tax(b) 1,684 0 1,684 Adoption of accounting standard (1,161 ) (1,324 ) (2,485 ) Net current period other comprehensive income (loss) including noncontrolling interest 7,174 (3,881 ) 3,293 Less: net current period other comprehensive loss attributable to the noncontrolling interest 0 236 236 Ending Balance at March 31, 2018 $ 1,782 $ (8,720 ) $ (6,938 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Reclassifications out of Accumulated Other Comprehensive Loss (a) Three Months Ended March 30, March 31, 2019 2018 Details about Other Comprehensive Loss Components Amounts Reclassified from Accumulated Other Comprehensive Loss Affected Line Item in the Statement Where Net Income is Presented Loss on Qualifying Hedges Interest rate contracts $ 1,262 $ (2,257 ) Interest expense 1,262 (2,257 ) (Loss) income before income taxes (320 ) 573 Benefit from income taxes $ 942 $ (1,684 ) Net (loss) income (a) Amounts in parentheses indicate debits to profit/loss

Segment Data

Segment Data	3 Months Ended
	Mar. 30, 2019
Segment Reporting [Abstract]
Segment Data	1 5 . The Company has four reportable segments based on an integrated geographical structure as follows: North America, Continental Europe (CE), United Kingdom, and Other. Other consists of Australia, New Zealand and emerging markets operations and franchise revenues and related costs, all of which have been grouped together as if they were a single reportable segment because they do not meet any of the quantitative thresholds and are immaterial for separate disclosure. To be consistent with the information that is presented to the chief operating decision maker, the Company does not include intercompany activity in the segment results. Information about the Company’s reportable segments is as follows: Total Revenue, net Three Months Ended March 30, 2019 March 31, 2018 North America $ 250,011 $ 279,179 Continental Europe 76,157 82,531 United Kingdom 24,611 30,284 Other 12,385 16,229 Total revenue, net $ 363,164 $ 408,223 Net (Loss) Income Three Months Ended March 30, 2019 March 31, 2018 Segment operating income: North America $ 41,113 $ 62,353 Continental Europe 10,076 17,930 United Kingdom (751 ) 3,868 Other (331 ) 1,587 Total segment operating income 50,107 85,738 General corporate expenses 28,210 23,665 Interest expense 35,195 35,866 Other expense (income), net 303 (235 ) Benefit from income taxes (2,875 ) (12,617 ) Net (loss) income $ (10,726 ) $ 39,059 Net loss attributable to the noncontrolling interest 39 53 Net (loss) income attributable to Weight Watchers International, Inc. $ (10,687 ) $ 39,112 Depreciation and Amortization Three Months Ended March 30, 2019 March 31, 2018 North America $ 9,303 $ 9,480 Continental Europe 381 301 United Kingdom 285 366 Other 112 144 Total segment depreciation and amortization 10,081 10,291 General corporate depreciation and amortization 3,532 2,777 Depreciation and amortization $ 13,613 $ 13,068 Due to the adoption of the updated lease accounting guidance the Company has a right of use operating lease asset of $148,447 as of March 30, 2019, of which 53% is in the North America reportable segment

Related Party

Related Party	3 Months Ended
	Mar. 30, 2019
Related Party Transactions [Abstract]
Related Party	1 6 . As previously disclosed, on October 18, 2015, the Company entered into the Strategic Collaboration Agreement with Oprah Winfrey, under which she will consult with the Company and participate in developing, planning, executing and enhancing the WW program and related initiatives, and provide it with services in her discretion to promote the Company and its programs, products and services. In addition to the Strategic Collaboration Agreement, Ms. Winfrey and her related entities provided services to the Company totaling $1,283 and $1,299 for the three months ended March 30, 2019 and March 31, 2018, respectively, which services included advertising, production and related fees. The Company’s accounts payable to parties related to Ms. Winfrey at March 30, 2019 and December 29, 2018 was $58 and $62, respectively. In March 2018, as permitted by the transfer provisions set forth in the previously disclosed Share Purchase Agreement, dated October 18, 2015, between the Company and Ms. Winfrey, and the Option Agreement, dated October 18, 2015, between the Company and Ms. Winfrey, Ms. Winfrey sold 954 of the shares she purchased under such purchase agreement and exercised a portion of her stock options resulting in the sale of 1,405 shares issuable under such options, respectively.

Restructuring

Restructuring	3 Months Ended
	Mar. 30, 2019
Restructuring And Related Activities [Abstract]
Restructuring	1 7 . Restructuring The Company undertook an organizational realignment which resulted in the elimination of certain positions and termination of employment for certain employees The Company recorded expenses in connection with employee termination benefit costs of $6,331 ($4,727 after tax) during the three months ended March 30, 2019. These expenses impacted cost of revenues by $1,425 and selling, general and administrative expense by $4,906. The Company does not anticipate recording additional expenses in connection with this organizational realignment. All expenses were recorded to general corporate expenses and therefore there was no impact to the segments. The liability for these expenses at March 30, 2019 was $6,147, and $184 of payments were made during the first fiscal quarter ended March 30, 2019.

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 30, 2019
Leases [Abstract]
Schedule of Lease Assets and Lease Liabilities	At March 30, 2019, the Company’s lease assets and lease liabilities were as follows: March 30, 2019 Assets: Operating lease assets $ 148,447 Finance lease assets 573 Total leased assets $ 149,020 Liabilities: Current Operating $ 36,125 Finance 376 Noncurrent Operating $ 121,308 Finance 107 Total lease liabilities $ 157,916
Schedule of Components of Lease Expense	For the three months ended March 30, 2019, the components of the Company’s lease expense were as follows Three Months Ended March 30, 2019 Operating lease cost $ 13,372 Finance lease cost: Amortization of leased assets 80 Interest on lease liabilities 8 Total finance lease cost $ 88 Total lease cost $ 13,460
Summary of Weighted Average Remaining Lease Term and Weighted Average Discount Rates	At March 30, 2019, the Company’s weighted average remaining lease term and weighted average discount rates were as follows: March 30, 2019 Weighted Average Remaining Lease Term (years) Operating leases 7.47 Finance leases 1.21 Weighted Average Discount Rate Operating leases 7.03 Finance leases 4.74
Schedule of Maturity of Lease Liabilities	At March 30, 2019, the maturity of the Company’s lease liabilities in each of the next five fiscal years and thereafter were as follows: Operating Leases Finance Leases Total Remainder of fiscal 2019 $ 35,516 $ 360 $ 35,876 2020 36,625 110 36,735 2021 27,812 27 27,839 2022 18,965 — 18,965 2023 14,252 — 14,252 Thereafter 75,909 — 75,909 Total lease payments $ 209,079 $ 497 $ 209,576 Less imputed interest 51,646 14 51,660 Present value of lease liabilities $ 157,433 $ 483 $ 157,916
Minimum Commitments Under Non-Cancelable Obligations	Minimum commitments under non-cancelable obligations, primarily for office and rental facilities operating leases at December 29, 2018, consisted of the following: 2019 $ 63,261 2020 38,491 2021 22,341 2022 14,017 2023 9,192 2024 and thereafter 37,704 Total $ 185,006
Summary of Supplemental Cash Flow Information Related To Leases	Supplemental cash flow information related to leases for the three months ended March 30, 2019 were as follows: Three Months Ended March 30, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 12,742 Operating cash flows from finance leases $ 8 Financing cash flows from finance leases $ 80 Leased assets obtained in exchange for new operating lease liabilities $ 887 Leased assets obtained in exchange for new finance lease liabilities $ —

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 30, 2019
Revenue From Contract With Customer [Abstract]
Schedule of Revenues Disaggregated by Revenue Source	The following table presents the Company’s revenues disaggregated by revenue source: Three Months Ended March 30, March 31, 2019 2018 Digital Subscription Revenues $ 148,855 $ 138,547 Studio + Digital Fees 157,871 190,122 Service Revenues, net $ 306,726 $ 328,669 Product sales and other, net 56,438 79,554 Revenues, net $ 363,164 $ 408,223
Schedule of Revenues Disaggregated by Segment	The following tables present the Company’s revenues disaggregated by segment: Three Months Ended March 30, 2019 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 98,760 $ 40,183 $ 6,418 $ 3,494 $ 148,855 Studio + Digital Fees 117,599 23,949 11,263 5,060 157,871 Service Revenues, net $ 216,359 $ 64,132 $ 17,681 $ 8,554 $ 306,726 Product sales and other, net 33,652 12,025 6,930 3,831 56,438 Revenues, net $ 250,011 $ 76,157 $ 24,611 $ 12,385 $ 363,164 Three Months Ended March 31, 2018 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 92,240 $ 36,161 $ 6,563 $ 3,583 $ 138,547 Studio + Digital Fees 140,152 29,080 14,382 6,508 190,122 Service Revenues, net $ 232,392 $ 65,241 $ 20,945 $ 10,091 $ 328,669 Product sales and other, net 46,787 17,290 9,339 6,138 79,554 Revenues, net $ 279,179 $ 82,531 $ 30,284 $ 16,229 $ 408,223
Schedule of Accounts Receivable and Deferred Revenues	The opening and ending balances of the Company’s deferred revenues are as follows: Deferred Deferred Revenue Revenue-Long Term Balance as of December 29, 2018 $ 53,501 $ 961 Net increase (decrease) during the period 7,096 (267 ) Balance as of March 30, 2019 $ 60,597 $ 694

Franchise Rights Acquired, Go_2

Franchise Rights Acquired, Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Values of Goodwill	For the three months ended March 30, 2019, the change in the carrying amount of goodwill was due to the effect of exchange rate changes as follows: North Continental United America Europe Kingdom Other Total Balance as of December 29, 2018 $ 138,156 $ 7,242 $ 1,178 $ 5,943 $ 152,519 Effect of exchange rate changes 852 (195 ) 31 (35 ) 653 Balance as of March 30, 2019 $ 139,008 $ 7,047 $ 1,209 $ 5,908 $ 153,172
Schedule of Finite-Lived Intangible Assets by Major Class	The carrying values of finite-lived intangible assets as of March 30, 2019 and December 29, 2018 were as follows: March 30, 2019 December 29, 2018 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Amount Amortization Capitalized software costs $ 125,356 $ 105,221 $ 121,508 $ 102,659 Website development costs 109,704 82,333 105,710 77,825 Trademarks 11,694 11,063 11,620 11,010 Other 13,985 4,258 13,967 4,149 Trademarks and other intangible assets $ 260,739 $ 202,875 $ 252,805 $ 195,643 Franchise rights acquired 8,098 4,378 8,110 4,319 Total finite-lived intangible assets $ 268,837 $ 207,253 $ 260,915 $ 199,962
Schedule of Expected Amortization Expense	Estimated amortization expense of existing finite-lived intangible assets for the next five fiscal years and thereafter is as follows: Remainder of fiscal 2019 $ 18,841 Fiscal 2020 $ 19,365 Fiscal 2021 $ 10,537 Fiscal 2022 $ 2,041 Fiscal 2023 and thereafter $ 10,800

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 30, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The components of the Company’s long-term debt were as follows: March 30, 2019 December 29, 2018 Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) Revolving Credit Facility due November 29, 2022 $ 0 $ 0 $ 0 0.00 % $ 0 $ 0 $ 0 4.39 % Term Loan Facility due November 29, 2024 1,443,750 7,957 24,933 8.14 % 1,482,250 8,307 26,033 7.53 % Notes due December 1, 2025 300,000 1,158 0 8.62 % 300,000 1,202 0 8.69 % Total $ 1,743,750 $ 9,115 $ 24,933 8.22 % $ 1,782,250 $ 9,509 $ 26,033 7.63 % Less: Current Portion 57,750 77,000 Unamortized Deferred Financing Costs 9,115 9,509 Unamortized Debt Discount 24,933 26,033 Total Long-Term Debt $ 1,651,952 $ 1,669,708

(Loss) Earnings Per Share (Tabl

(Loss) Earnings Per Share (Tables)	3 Months Ended
	Mar. 30, 2019
Earnings Per Share [Abstract]
Schedule of (Loss) Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted (loss) earnings per share: Three Months Ended March 30, March 31, 2019 2018 Numerator: Net (loss) income attributable to Weight Watchers International, Inc. $ (10,687 ) $ 39,112 Denominator: Weighted average shares of common stock outstanding 66,964 65,123 Effect of dilutive common stock equivalents — 4,378 Weighted average diluted common shares outstanding 66,964 69,501 (Loss) earnings per share attributable to Weight Watchers International, Inc. Basic $ (0.16 ) $ 0.60 Diluted $ (0.16 ) $ 0.56

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 30, 2019
Income Tax Disclosure [Abstract]
Summary of Differences Between U.S. Federal Statutory Tax Rate and Company's Consolidated Effective Tax Rate	The differences between the U.S. federal statutory tax rate and the Company’s consolidated effective tax rate were as follows: Three Months Ended March 30, March 31, 2019 2018 U.S. federal statutory tax rate 21.0 % 21.0 % State income taxes (net of federal benefit) (10.8 %) 2.9 % Cessation of operations 0.0 % (7.0 %) Research and development credit 2.3 % (1.6 %) Tax windfall on share-based awards 0.0 % (68.5 %) GILTI (6.3 %) 0.0 % FDII 4.8 % 0.0 % Section 162(m) limitation (1.4 %) 1.0 % Increase in valuation allowance due to net operating loss (2.2 %) 1.6 % Impact of foreign operations 3.9 % 1.0 % Other 9.8 % 1.9 % Total effective tax rate 21.1 % (47.7 %)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following table presents the aggregate fair value of the Company’s derivative financial instruments: Fair Value Measurements Using: Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Interest rate swap asset at March 30, 2019 $ 2,229 $ 0 $ 2,229 $ 0 Interest rate swap liability at March 30, 2019 $ 9,961 $ 0 $ 9,961 $ 0 Interest rate swap asset at December 29, 2018 $ 3,924 $ 0 $ 3,924 $ 0 Interest rate swap liability at December 29, 2018 $ 5,578 $ 0 $ 5,578 $ 0

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 30, 2019
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss by Component	Amounts reclassified out of accumulated other comprehensive loss are as follows: Changes in Accumulated Other Comprehensive Loss by Component (a) Three Months Ended March 30, 2019 Loss on Qualifying Hedges Loss on Foreign Currency Translation Total Beginning Balance at December 29, 2018 $ (1,175 ) $ (14,582 ) $ (15,757 ) Other comprehensive (loss) income before reclassifications, net of tax (4,552 ) 1,279 (3,273 ) Amounts reclassified from accumulated other comprehensive loss, net of tax (b) (942 ) 0 (942 ) Net current period other comprehensive (loss) income including noncontrolling interest (5,494 ) 1,279 (4,215 ) Less: net current period other comprehensive loss attributable to the noncontrolling interest 0 6 6 Ending Balance at March 30, 2019 $ (6,669 ) $ (13,297 ) $ (19,966 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Three months ended March 31, 2018 (Loss) Gain on Qualifying Hedges Loss on Foreign Currency Translation Total Beginning Balance at December 30, 2017 $ (5,392 ) $ (5,075 ) $ (10,467 ) Other comprehensive income (loss) before reclassifications, net of tax 6,651 (2,557 ) 4,094 Amounts reclassified from accumulated other comprehensive loss, net of tax(b) 1,684 0 1,684 Adoption of accounting standard (1,161 ) (1,324 ) (2,485 ) Net current period other comprehensive income (loss) including noncontrolling interest 7,174 (3,881 ) 3,293 Less: net current period other comprehensive loss attributable to the noncontrolling interest 0 236 236 Ending Balance at March 31, 2018 $ 1,782 $ (8,720 ) $ (6,938 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications
Reclassifications out of Accumulated Other Comprehensive Loss	Reclassifications out of Accumulated Other Comprehensive Loss (a) Three Months Ended March 30, March 31, 2019 2018 Details about Other Comprehensive Loss Components Amounts Reclassified from Accumulated Other Comprehensive Loss Affected Line Item in the Statement Where Net Income is Presented Loss on Qualifying Hedges Interest rate contracts $ 1,262 $ (2,257 ) Interest expense 1,262 (2,257 ) (Loss) income before income taxes (320 ) 573 Benefit from income taxes $ 942 $ (1,684 ) Net (loss) income (a) Amounts in parentheses indicate debits to profit/loss

Segment Data (Tables)

Segment Data (Tables)	3 Months Ended
	Mar. 30, 2019
Segment Reporting [Abstract]
Information About Reportable Segments	Information about the Company’s reportable segments is as follows: Total Revenue, net Three Months Ended March 30, 2019 March 31, 2018 North America $ 250,011 $ 279,179 Continental Europe 76,157 82,531 United Kingdom 24,611 30,284 Other 12,385 16,229 Total revenue, net $ 363,164 $ 408,223 Net (Loss) Income Three Months Ended March 30, 2019 March 31, 2018 Segment operating income: North America $ 41,113 $ 62,353 Continental Europe 10,076 17,930 United Kingdom (751 ) 3,868 Other (331 ) 1,587 Total segment operating income 50,107 85,738 General corporate expenses 28,210 23,665 Interest expense 35,195 35,866 Other expense (income), net 303 (235 ) Benefit from income taxes (2,875 ) (12,617 ) Net (loss) income $ (10,726 ) $ 39,059 Net loss attributable to the noncontrolling interest 39 53 Net (loss) income attributable to Weight Watchers International, Inc. $ (10,687 ) $ 39,112 Depreciation and Amortization Three Months Ended March 30, 2019 March 31, 2018 North America $ 9,303 $ 9,480 Continental Europe 381 301 United Kingdom 285 366 Other 112 144 Total segment depreciation and amortization 10,081 10,291 General corporate depreciation and amortization 3,532 2,777 Depreciation and amortization $ 13,613 $ 13,068

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018
Lessee Lease Description [Line Items]
Operating lease assets	$ 148,447		$ 0
Operating lease liabilities	$ 157,433
Lease weighted average remaining lease term	7 years 5 months 12 days
Operating leases, rent expense		$ 10,791
Minimum
Lessee Lease Description [Line Items]
Leases, remaining lease term	0 years
Maximum
Lessee Lease Description [Line Items]
Leases, remaining lease term	14 years
ASU 2016-02
Lessee Lease Description [Line Items]
Operating lease assets	$ 158,773
Operating lease liabilities	167,081
Retained earnings for operating leases	$ 0

Leases - Schedule of Lease Asse

Leases - Schedule of Lease Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Assets:
Operating lease assets	$ 148,447	$ 0
Finance lease assets	573
Total leased assets	149,020
Current
Operating	36,125	0
Finance	376
Noncurrent
Operating	121,308	$ 0
Finance	107
Total lease liabilities	$ 157,916

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 13,372
Finance lease cost:
Amortization of leased assets	80
Interest on lease liabilities	8
Total finance lease cost	88
Total lease cost	$ 13,460

Leases - Summary of Weighted Av

Leases - Summary of Weighted Average Remaining Lease Term and Weighted Average Discount Rates (Detail)	Mar. 30, 2019
Weighted Average Remaining Lease Term (years)
Operating leases	7 years 5 months 19 days
Finance leases	1 year 2 months 15 days
Weighted Average Discount Rate
Operating leases	7.03%
Finance leases	4.74%

Leases - Schedule of Maturity o

Leases - Schedule of Maturity of Lease Liabilities (Detail) $ in Thousands	Mar. 30, 2019USD ($)
Operating Leases
Remainder of fiscal 2019	$ 35,516
2020	36,625
2021	27,812
2022	18,965
2023	14,252
Thereafter	75,909
Total lease payments	209,079
Less imputed interest	51,646
Present value of lease liabilities	157,433
Finance Leases
Remainder of fiscal 2019	360
2020	110
2021	27
Total lease payments	497
Less imputed interest	14
Present value of lease liabilities	483
Total
Remainder of fiscal 2019	35,876
2020	36,735
2021	27,839
2022	18,965
2023	14,252
Thereafter	75,909
Total lease payments	209,576
Less imputed interest	51,660
Present value of lease liabilities	$ 157,916

Leases - Minimum Commitments Un

Leases - Minimum Commitments Under Non-Cancelable Obligations (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Lessee Lease Description [Line Items]
2019	$ 35,516
2020	36,625
2021	27,812
2022	18,965
2023	14,252
2024 and thereafter	75,909
Total lease payments	$ 209,079
Non Cancelable Obligations
Lessee Lease Description [Line Items]
2019		$ 63,261
2020		38,491
2021		22,341
2022		14,017
2023		9,192
2024 and thereafter		37,704
Total lease payments		$ 185,006

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information Related To Leases (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 12,742
Operating cash flows from finance leases	8
Financing cash flows from finance leases	80
Leased assets obtained in exchange for new operating lease liabilities	$ 887

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Dec. 29, 2018	Dec. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Decrease to deferred revenue	$ (60,597)	$ (53,501)
Decrease to prepaid expenses and other current assets	(30,543)	(42,355)
Increase to deferred income tax liability	189,226	$ 190,258
Deferred revenue recognized	$ 47,869
Revenue, practical expedient, remaining performance obligation, description	contracts with an original expected length of one year or less.
Revenue, remaining performance obligation, optional exemption, performance obligation	true
Other Liabilities
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Long-term deferred revenue	$ 694
Accounting Standards Update 2014-09 | Retained Earnings
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net increase to opening retained earnings			$ 2,145
Difference between Revenue Guidance in Effect Before and After Topic 606 | Accounting Standards Update 2014-09
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Decrease to deferred revenue			3,501
Decrease to prepaid expenses and other current assets			568
Increase to deferred income tax liability			$ 788

Revenue - Schedule of Revenues

Revenue - Schedule of Revenues Disaggregated by Revenue Source (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 363,164	$ 408,223
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net	148,855	138,547
Studio + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net	157,871	190,122
Service Revenues, net
Disaggregation Of Revenue [Line Items]
Revenues, net	306,726	328,669
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 56,438	$ 79,554

Revenue - Schedule of Revenue_2

Revenue - Schedule of Revenues Disaggregated by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 363,164	$ 408,223
North America
Disaggregation Of Revenue [Line Items]
Revenues, net	250,011	279,179
Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	76,157	82,531
United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	24,611	30,284
Other
Disaggregation Of Revenue [Line Items]
Revenues, net	12,385	16,229
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net	148,855	138,547
Digital Subscription Revenues | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	98,760	92,240
Digital Subscription Revenues | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	40,183	36,161
Digital Subscription Revenues | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	6,418	6,563
Digital Subscription Revenues | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	3,494	3,583
Studio + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net	157,871	190,122
Studio + Digital Fees | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	117,599	140,152
Studio + Digital Fees | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	23,949	29,080
Studio + Digital Fees | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	11,263	14,382
Studio + Digital Fees | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	5,060	6,508
Service Revenues, net
Disaggregation Of Revenue [Line Items]
Revenues, net	306,726	328,669
Service Revenues, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	216,359	232,392
Service Revenues, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	64,132	65,241
Service Revenues, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	17,681	20,945
Service Revenues, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	8,554	10,091
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net	56,438	79,554
Product sales and other, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	33,652	46,787
Product sales and other, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	12,025	17,290
Product sales and other, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	6,930	9,339
Product sales and other, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 3,831	$ 6,138

Revenue - Schedule of Accounts

Revenue - Schedule of Accounts Receivable and Deferred Revenues (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Deferred Revenue - Short Term
Contract With Customer Asset And Liability [Line Items]
Deferred Revenue, Beginning balance	$ 53,501
Net increase (decrease) during the period	7,096
Deferred Revenue, Ending balance	60,597
Deferred Revenue - Long Term
Contract With Customer Asset And Liability [Line Items]
Deferred Revenue, Beginning balance	961
Net increase (decrease) during the period	(267)
Deferred Revenue, Ending balance	$ 694

Changes in Carrying Values of G

Changes in Carrying Values of Goodwill (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Goodwill [Line Items]
Beginning balance	$ 152,519
Ending balance	153,172
Kurbo Health, Inc.
Goodwill [Line Items]
Beginning balance	152,519
Effect of exchange rate changes	653
Ending balance	153,172
Kurbo Health, Inc. | North America
Goodwill [Line Items]
Beginning balance	138,156
Effect of exchange rate changes	852
Ending balance	139,008
Kurbo Health, Inc. | Continental Europe
Goodwill [Line Items]
Beginning balance	7,242
Effect of exchange rate changes	(195)
Ending balance	7,047
Kurbo Health, Inc. | United Kingdom
Goodwill [Line Items]
Beginning balance	1,178
Effect of exchange rate changes	31
Ending balance	1,209
Kurbo Health, Inc. | Other
Goodwill [Line Items]
Beginning balance	5,943
Effect of exchange rate changes	(35)
Ending balance	$ 5,908

Carrying Amount of Finite-Lived

Carrying Amount of Finite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 268,837	$ 260,915
Accumulated Amortization	207,253	199,962
Capitalized software costs
Finite-Lived Intangible Assets
Gross Carrying Amount	125,356	121,508
Accumulated Amortization	105,221	102,659
Website development costs
Finite-Lived Intangible Assets
Gross Carrying Amount	109,704	105,710
Accumulated Amortization	82,333	77,825
Trademarks
Finite-Lived Intangible Assets
Gross Carrying Amount	11,694	11,620
Accumulated Amortization	11,063	11,010
Other
Finite-Lived Intangible Assets
Gross Carrying Amount	13,985	13,967
Accumulated Amortization	4,258	4,149
Trademarks and other intangible assets
Finite-Lived Intangible Assets
Gross Carrying Amount	260,739	252,805
Accumulated Amortization	202,875	195,643
Franchise Rights
Finite-Lived Intangible Assets
Gross Carrying Amount	8,098	8,110
Accumulated Amortization	$ 4,378	$ 4,319

Franchise Rights Acquired, Go_3

Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Finite-lived intangible assets, aggregate amortization expense	$ 7,556	$ 7,410

Estimated Amortization Expense

Estimated Amortization Expense of Existing Finite-Lived Intangible Assets (Detail) $ in Thousands	Mar. 30, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of fiscal 2019	$ 18,841
Fiscal 2020	19,365
Fiscal 2021	10,537
Fiscal 2022	2,041
Fiscal 2023 and thereafter	$ 10,800

Components of Current and Long-

Components of Current and Long-Term Debt (Detail) - USD ($)		Mar. 30, 2019	Dec. 29, 2018
Debt Instrument
Total Debt		$ 1,743,750,000	$ 1,782,250,000
Less: Current Portion		57,750,000	77,000,000
Unamortized Deferred Financing Costs		9,115,000	9,509,000
Unamortized Debt Discount		24,933,000	26,033,000
Total Long-Term Debt		$ 1,651,952,000	$ 1,669,708,000
Effective Interest Rate	[1]	8.22%	7.63%
Term Loan due November 29, 2024
Debt Instrument
Total Debt		$ 1,443,750,000	$ 1,482,250,000
Unamortized Deferred Financing Costs		7,957,000	8,307,000
Unamortized Debt Discount		$ 24,933,000	$ 26,033,000
Effective Interest Rate	[1]	8.14%	7.53%
Notes due December 1, 2025
Debt Instrument
Total Debt		$ 300,000,000	$ 300,000,000
Unamortized Deferred Financing Costs		1,158,000	1,202,000
Unamortized Debt Discount		$ 0	$ 0
Effective Interest Rate	[1]	8.62%	8.69%
Revolving Credit Facility due November 29, 2022
Debt Instrument
Total Debt		$ 0	$ 0
Unamortized Deferred Financing Costs		0	0
Unamortized Debt Discount		$ 0	$ 0
Effective Interest Rate	[1]	0.00%	4.39%
[1]	Includes amortization of deferred financing costs and debt discount.

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)		Nov. 30, 2020	Nov. 29, 2017	Mar. 30, 2019	Dec. 30, 2017	Dec. 29, 2018
Debt Instrument
Unamortized Debt Discount				$ 24,933,000		$ 26,033,000
Write-off of deferred financing fees			$ 4,808,000
Gain (loss) on early extinguishment of debt			(10,524,000)
Debt outstanding amount				$ 1,743,750,000		$ 1,782,250,000
Percentage of equity interests pledged				100.00%
Effective Interest Rate	[1]			8.22%		7.63%
Average interest rate on outstanding debt, exclusive the impact of swap				8.22%		7.73%
Average interest rate on outstanding debt, including the impact of swap				7.50%		7.46%
Maximum
Debt Instrument
Pledge percentage of first tier foreign subsidiaries directly owned by company or wholly owned subsidiaries				65.00%
Revolving Credit Facility
Debt Instrument
Credit facility available amount			50,000,000	$ 148,841,000
Total Debt			150,000,000	1,709,702,000		$ 1,746,708,000
Line off credit facility drawn amount				0		0
Unamortized Debt Discount				0		0
Debt outstanding amount				0		$ 0
Line of credit facility, issued but undrawn letters of credit				$ 1,159,000
Effective Interest Rate	[1]			0.00%		4.39%
Percentage of equity interests pledged				0.25%
Consolidated first lien net debt leverage ratio				2.91
Term Loan Facility
Debt Instrument
Debt outstanding amount				$ 1,443,750,000
Credit Facilities
Debt Instrument
Credit Facility, maximum borrowing capacity			1,930,386,000
Total Debt			1,565,000,000	1,743,750,000
Line off credit facility drawn amount			25,000,000
Fees incurred in connection with debt refinancing					$ 53,832,000
Unamortized Debt Discount			30,800,000
Deferred financing costs			5,716,000
Term Loan Facility
Debt Instrument
Total Debt			1,540,000,000	$ 1,443,750,000
Term Loan Facility | Higher of Federal Funds Effective Rate and Overnight Bank Funding Rate
Debt Instrument
Credit facility, interest rate				0.50%
Term Loan Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument
Credit facility, interest rate				1.00%
Debt instrument variable rate floor percent determined option one				0.75%
Effective Interest Rate				4.75%
Term Loan Facility | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument
Debt instrument variable rate floor percent determined option one				1.75%
Notes due December 1, 2025
Debt Instrument
Total Debt			$ 300,000,000	$ 300,000,000
Debt Instrument Interest Rate Stated Percentage			8.625%	8.625%
Unamortized Debt Discount				$ 0		$ 0
Debt outstanding amount				$ 300,000,000		$ 300,000,000
Effective Interest Rate	[1]			8.62%		8.69%
Debt instrument issued date				Nov. 29, 2017
Debt instrument, due date				Dec. 1, 2025
Debt instrument interest payment term				Interest on the Notes is payable semi-annually on June 1 and December 1 of each year, beginning on June 1, 2018.
Debt Instrument, redemption, description				On or after December 1, 2020, the Company may on any one or more occasions redeem some or all of the Notes at a purchase price equal to 104.313% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to, but not including, the redemption date, such optional redemption price decreasing to 102.156% on or after December 1, 2021 and to 100.000% on or after December 1, 2022.
Notes due December 1, 2025 | Scenario, Forecast
Debt Instrument
Debt Instrument, percentage of principal can be redeemed		108.625%
Notes due December 1, 2025 | Change of Control | Scenario, Forecast
Debt Instrument
Repurchase price of principal amount of notes plus accrued and unpaid interest		101.00%
Notes due December 1, 2025 | Sale of Assets | Scenario, Forecast
Debt Instrument
Repurchase price of principal amount of notes plus accrued and unpaid interest		100.00%
Notes due December 1, 2025 | Debt Instrument Redemption Date, December 1, 2020
Debt Instrument
Debt Instrument, percentage of principal can be redeemed				104.313%
Debt Instrument, redemption date				Dec. 1, 2020
Notes due December 1, 2025 | Debt Instrument Redemption Date, December 1, 2021
Debt Instrument
Debt Instrument, percentage of principal can be redeemed				102.156%
Debt Instrument, redemption date				Dec. 1, 2021
Notes due December 1, 2025 | Debt Instrument Redemption Date, December 1, 2022
Debt Instrument
Debt Instrument, percentage of principal can be redeemed				100.00%
Debt Instrument, redemption date				Dec. 1, 2022
Notes due December 1, 2025 | Maximum | Scenario, Forecast
Debt Instrument
Percent of principal amount of debt that may be redeemed (up to)		40.00%
Senior Secured Tranche B Term Loan | Term Loan Facility
Debt Instrument
Credit Facility, maximum borrowing capacity			$ 1,540,000,000
Debt Instrument, maturity year			2024
Senior Secured Revolving Credit Facility | Revolving Credit Facility
Debt Instrument
Credit Facility, maximum borrowing capacity			$ 150,000,000
Debt Instrument, maturity year			2022
Revolving Credit Facility
Debt Instrument
Total Debt				$ 0
Revolving Credit Facility | Higher of Federal Funds Effective Rate and Overnight Bank Funding Rate
Debt Instrument
Credit facility, interest rate				0.50%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument
Credit facility, interest rate				1.00%
Effective Interest Rate				2.00%
[1]	Includes amortization of deferred financing costs and debt discount.

Computation of Basic and Dilute

Computation of Basic and Diluted (Loss) Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Numerator:
Net income attributable to Weight Watchers International, Inc.	$ (10,687)	$ 39,112
Denominator:
Weighted average shares of common stock outstanding	66,964	65,123
Effect of dilutive common stock equivalents		4,378
Weighted average diluted common shares outstanding	66,964	69,501
(Loss) earnings per share attributable to Weight Watchers International, Inc.
Basic	$ (0.16)	$ 0.60
Diluted	$ (0.16)	$ 0.56

(Loss) Earnings Per Share - Add

(Loss) Earnings Per Share - Additional Information (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Anti-dilutive common stock equivalents excluded from the calculation of diluted earnings per share	4,223	594

Stock Plans - Additional Inform

Stock Plans - Additional Information (Detail) - Performance-based stock unit - shares	1 Months Ended			12 Months Ended
	May 31, 2018	Jul. 31, 2017	May 31, 2017	Dec. 30, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Other than options, granted	81,300	47,900	98,500		289,900
Performance period (years)				3 years
Net debt to EBITDA ratio					450.00%
Debt ratio achievement percentage					166.67%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	21.10%	(47.70%)
Effective state income tax expenses	$ 1,462
Tax expense related to global intangible low taxed income	856
Tax expense (benefit) related to foreign derived intangible income	$ (648)
Tax shortfall on share-based awards		$ (18,105)
Benefit on closure of subsidiary		$ (1,859)

Income Taxes - Summary of Diffe

Income Taxes - Summary of Differences Between U.S. Federal Statutory Tax Rate and Company's Consolidated Effective Tax Rate (Detail)	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	21.00%
State income taxes (net of federal benefit)	(10.80%)	2.90%
Cessation of operations	0.00%	(7.00%)
Research and development credit	2.30%	(1.60%)
Tax windfall on share-based awards	0.00%	(68.50%)
GILTI	(6.30%)	0.00%
FDII	4.80%	0.00%
Section 162(m) limitation	(1.40%)	1.00%
Increase in valuation allowance due to net operating loss	(2.20%)	1.60%
Impact of foreign operations	3.90%	1.00%
Other	9.80%	1.90%
Total effective tax rate	21.10%	(47.70%)

Derivative Instruments and He_2

Derivative Instruments and Hedging - Additional Information (Detail) - USD ($)	Jun. 11, 2018	Jul. 26, 2013	Mar. 30, 2019	Dec. 29, 2018
Derivative
Maximum length of time hedging forecasted			5 years
Derivative gains included in accumulated other comprehensive income (loss) that are expected to be reclassified into earnings within the next 12 months, net of tax			$ 690,000
Derivative gains included in accumulated other comprehensive income (loss) that are expected to be reclassified into earnings within the next 12 months, before tax			$ 925,000
Interest Rate Swap
Derivative
Forward-starting interest rate swap, effective date	Apr. 2, 2020	Mar. 31, 2014
Forward starting interest rate swap, termination date	Mar. 31, 2024	Apr. 2, 2020
Derivative interest rate swap percentage	3.1005%		2.41%
Cumulative losses for qualifying hedges reported as a component of accumulated other comprehensive loss net of tax			$ 6,669,000	$ 1,175,000
Cumulative losses for qualifying hedges reported as a component of accumulated other comprehensive loss before tax			8,995,000	1,634,000
Interest Rate Swap | Other Noncurrent Asset
Derivative
Interest rate swap asset				398,000
Interest Rate Swap | Other Current Asset
Derivative
Interest rate swap asset			2,229,000	3,526,000
Interest Rate Swap | Cash Flow Hedging
Derivative
Notional amount	$ 500,000,000	$ 1,500,000,000	1,250,000,000	1,250,000,000
Interest Rate Swap | Cash Flow Hedging | March 31, 2014
Derivative
Notional amount			$ 1,500,000,000
Forward-starting interest rate swap, effective date			Mar. 31, 2014
Interest Rate Swap | Cash Flow Hedging | April 3, 2017
Derivative
Notional amount			$ 1,250,000,000
Forward-starting interest rate swap, effective date			Apr. 3, 2017
Interest Rate Swap | Cash Flow Hedging | April 1, 2019
Derivative
Notional amount			$ 1,000,000,000
Forward-starting interest rate swap, effective date			Apr. 1, 2019
Interest Rate Swap | Cash Flow Hedging | April 2, 2020
Derivative
Notional amount			$ 500,000,000
Forward-starting interest rate swap, effective date			Apr. 2, 2020
Interest Rate Swap | Cash Flow Hedging | March 31, 2021
Derivative
Notional amount			$ 250,000,000
Forward-starting interest rate swap, effective date			Mar. 31, 2021
Future Swap | Derivative Payable
Derivative
Interest rate swap liability			$ 9,961,000	$ 5,578,000

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Mar. 30, 2019	Dec. 29, 2018	Nov. 29, 2017
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value assets, transfer between level 1 to level 2	$ 0	$ 0
Fair value liabilities, transfer between level 1 to level 2	0	0
Fair value assets, transfer between level 2 to level 1	0	0
Fair value liabilities, transfer between level 2 to level 1	0	0
Revolving Credit Facility
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value of long-term debt	0	0
Fair value of long-term debt	1,628,502,000	1,757,717,000
Debt outstanding amount	$ 1,709,702,000	$ 1,746,708,000	$ 150,000,000

Aggregate Fair Value of Derivat

Aggregate Fair Value of Derivative Financial Instruments (Detail) - Fair Value, Measurements, Recurring - Interest Rate Swap - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap asset	$ 2,229	$ 3,924
Interest rate swap liability	9,961	5,578
Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap asset	0	0
Interest rate swap liability	0	0
Fair Value Measurements Using Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap asset	2,229	3,924
Interest rate swap liability	9,961	5,578
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap asset	0	0
Interest rate swap liability	$ 0	$ 0

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 30, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (808,943)	$ (1,015,986)
Other comprehensive (loss) income before reclassifications, net of tax	[1]	(3,273)	4,094
Amounts reclassified from accumulated other comprehensive loss, net of tax	[1],[2]	(942)	1,684
Adoption of accounting standard	[1]		(2,485)
Net current period other comprehensive (loss) income including noncontrolling interest	[1]	(4,215)	3,293
Less: net current period other comprehensive income (loss) attributable to the noncontrolling interest	[1]	6	236
Ending balance		(818,934)	(1,000,101)
(Loss) Gain on Qualifying Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(1,175)	(5,392)
Other comprehensive (loss) income before reclassifications, net of tax	[1]	(4,552)	6,651
Amounts reclassified from accumulated other comprehensive loss, net of tax	[1],[2]	(942)	1,684
Adoption of accounting standard	[1]		(1,161)
Net current period other comprehensive (loss) income including noncontrolling interest	[1]	(5,494)	7,174
Less: net current period other comprehensive income (loss) attributable to the noncontrolling interest	[1]	0	0
Ending balance	[1]	(6,669)	1,782
Loss on Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(14,582)	(5,075)
Other comprehensive (loss) income before reclassifications, net of tax	[1]	1,279	(2,557)
Amounts reclassified from accumulated other comprehensive loss, net of tax	[1],[2]	0	0
Adoption of accounting standard	[1]		(1,324)
Net current period other comprehensive (loss) income including noncontrolling interest	[1]	1,279	(3,881)
Less: net current period other comprehensive income (loss) attributable to the noncontrolling interest	[1]	6	236
Ending balance	[1]	(13,297)	(8,720)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(15,757)	(10,467)
Ending balance	[1]	$ (19,966)	$ (6,938)
[1]	Amounts in parentheses indicate debits
[2]	See separate table below for details about these reclassifications

Reclassifications out of Accumu

Reclassifications out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 30, 2019	Mar. 31, 2018
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense		$ (35,195)	$ (35,866)
(Loss) income before income taxes		13,601	(26,442)
Benefit from income taxes		(2,875)	(12,617)
Net (loss) income		10,726	(39,059)
Loss on Qualifying Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
(Loss) income before income taxes	[1]	1,262	(2,257)
Benefit from income taxes	[1]	(320)	573
Net (loss) income	[1]	942	(1,684)
Loss on Qualifying Hedges | Interest Rate Contract | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	[1]	$ 1,262	$ (2,257)
[1]	Amounts in parentheses indicate debits to profit/loss

Segment Data - Additional Infor

Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)Segment	Dec. 29, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	4
Operating lease assets | $	$ 148,447	$ 0
Operating Segments | North America
Segment Reporting Information [Line Items]
Segment reportable percentage	53.00%
General Corporate
Segment Reporting Information [Line Items]
Segment reportable percentage	42.00%

Information About Reportable Se

Information About Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net revenue	$ 363,164	$ 408,223
Operating income	21,897	62,073
Interest expense	35,195	35,866
Other expense (income), net	303	(235)
Benefit from income taxes	(2,875)	(12,617)
Net (loss) income	(10,726)	39,059
Net loss attributable to the noncontrolling interest	39	53
Net (loss) income attributable to Weight Watchers International, Inc.	(10,687)	39,112
Depreciation and amortization	13,613	13,068
Operating Segments
Segment Reporting Information [Line Items]
Operating income	50,107	85,738
Depreciation and amortization	10,081	10,291
General corporate expenses
Segment Reporting Information [Line Items]
General corporate expenses	28,210	23,665
Depreciation and amortization	3,532	2,777
North America
Segment Reporting Information [Line Items]
Net revenue	250,011	279,179
North America | Operating Segments
Segment Reporting Information [Line Items]
Operating income	41,113	62,353
Depreciation and amortization	9,303	9,480
Continental Europe
Segment Reporting Information [Line Items]
Net revenue	76,157	82,531
Continental Europe | Operating Segments
Segment Reporting Information [Line Items]
Operating income	10,076	17,930
Depreciation and amortization	381	301
United Kingdom
Segment Reporting Information [Line Items]
Net revenue	24,611	30,284
United Kingdom | Operating Segments
Segment Reporting Information [Line Items]
Operating income	(751)	3,868
Depreciation and amortization	285	366
Other
Segment Reporting Information [Line Items]
Net revenue	12,385	16,229
Other | Operating Segments
Segment Reporting Information [Line Items]
Operating income	(331)	1,587
Depreciation and amortization	$ 112	$ 144

Related Party - Additional Info

Related Party - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018
Ms. Winfrey and her related entities
Related Party Transaction [Line Items]
Related Party Transaction, service provided by related party	$ 1,283	$ 1,299
Ms. Winfrey
Related Party Transaction [Line Items]
Accounts payable to related parties	$ 58		$ 62
Number of shares purchased from related party	954
Stock options exercised	1,405

Restructuring - Additional Info

Restructuring - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Restructuring Cost And Reserve [Line Items]
Expenses	$ 6,331
Expenses, after tax	4,727
Expenses, liability	6,147
Payments for expenses	184
Cost of Revenues
Restructuring Cost And Reserve [Line Items]
Expenses	1,425
Selling, General and Administrative Expense
Restructuring Cost And Reserve [Line Items]
Expenses	$ 4,906