WW International (WW) 10-K 26 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 29, 2018	Feb. 01, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 29, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	WTW
Entity Registrant Name	WEIGHT WATCHERS INTERNATIONAL INC
Entity Central Index Key	105,319
Current Fiscal Year End Date	--12-29
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		66,960,122
Entity Public Float			$ 4,004,158,613

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 236,974	$ 83,054
Receivables (net of allowances: December 29, 2018 - $1,743 and December 30, 2017 - $2,001)	27,247	23,913
Inventories	25,851	31,728
Prepaid income taxes	33,997	43,488
Prepaid expenses and other current assets	42,355	26,805
TOTAL CURRENT ASSETS	366,424	208,988
Property and equipment, net	52,202	47,978
Franchise rights acquired	751,134	754,040
Goodwill	152,519	156,281
Other intangible assets, net	57,162	46,536
Deferred income taxes	16,230	12,447
Other noncurrent assets	18,870	19,730
TOTAL ASSETS	1,414,541	1,246,000
CURRENT LIABILITIES
Portion of long-term debt due within one year	77,000	82,750
Accounts payable	27,098	24,356
Salaries and wages payable	64,600	62,179
Accrued marketing and advertising	14,052	18,154
Accrued interest	28,651	10,834
Other accrued liabilities	48,218	52,516
Derivative payable	5,578	12,171
Income taxes payable	22,618	5,735
Deferred revenue	53,501	74,332
TOTAL CURRENT LIABILITIES	341,316	343,027
Long-term debt, net	1,669,708	1,740,612
Deferred income taxes	190,258	143,591
Other	18,289	30,289
TOTAL LIABILITIES	2,219,571	2,257,519
Commitments and contingencies (Note 15)
Redeemable noncontrolling interest	3,913	4,467
TOTAL DEFICIT
Common stock, $0 par value; 1,000,000 shares authorized; 120,352 shares issued at December 29, 2018 and 118,947 shares issued at December 30, 2017	0	0
Treasury stock, at cost, 53,396 shares at December 29, 2018 and 54,258 shares at December 30, 2017	(3,175,624)	(3,208,836)
Retained earnings	2,382,438	2,203,317
Accumulated other comprehensive loss	(15,757)	(10,467)
TOTAL DEFICIT	(808,943)	(1,015,986)
TOTAL LIABILITIES AND TOTAL DEFICIT	$ 1,414,541	$ 1,246,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Statement Of Financial Position [Abstract]
Receivables, allowances	$ 1,743	$ 2,001
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	118,947,000
Treasury stock, shares	53,396,000	54,258,000

CONSOLIDATED STATEMENTS OF NET

CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Revenues, net	$ 1,514,121	$ 1,306,911	$ 1,164,902
Cost of revenues	647,711	614,262	579,401
Gross profit	866,410	692,649	585,501
Marketing expenses	226,319	200,797	194,398
Selling, general and administrative expenses	251,106	211,224	190,292
Goodwill impairment	0	13,323	0
Operating income	388,985	267,305	200,811
Interest expense	142,346	112,784	115,160
Other expense, net	2,578	472	1,524
Early extinguishment of debt, net	0	8,969	0
Income before income taxes	244,061	145,080	84,127
Provision for (benefit from) income taxes	20,493	(18,237)	16,634
Net income	223,568	163,317	67,493
Net loss attributable to the noncontrolling interest	181	197	206
Net income attributable to Weight Watchers International, Inc.	$ 223,749	$ 163,514	$ 67,699
Earnings Per Share attributable to Weight Watchers International, Inc.
Basic	$ 3.38	$ 2.54	$ 1.06
Diluted	$ 3.19	$ 2.40	$ 1.03
Weighted average common shares outstanding
Basic	66,280	64,329	63,742
Diluted	70,115	68,248	65,897
Service
Revenues, net	$ 1,273,196	$ 1,081,679	$ 949,121
Cost of revenues	508,477	486,293	468,761
Product and Other
Revenues, net	240,925	225,232	215,781
Cost of revenues	$ 139,234	$ 127,969	$ 110,640

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 223,568	$ 163,317	$ 67,493
Other comprehensive (loss) gain:
Foreign currency translation (loss) gain	(11,462)	9,848	5,556
Income tax benefit (expense) on foreign currency translation (loss) gain	2,906	(3,840)	(2,089)
Foreign currency translation (loss) gain, net of taxes	(8,556)	6,008	3,467
Gain on derivatives	7,205	17,393	11,821
Income tax expense on gain on derivatives	(1,827)	(6,783)	(4,688)
Gain on derivatives, net of taxes	5,378	10,610	7,133
Total other comprehensive (loss) gain	(3,178)	16,618	10,600
Comprehensive income	220,390	179,935	78,093
Net loss attributable to the noncontrolling interest	181	197	206
Foreign currency translation loss (gain), net of taxes attributable to the noncontrolling interest	373	35	(455)
Comprehensive loss (income) attributable to the noncontrolling interest	554	232	(249)
Comprehensive income attributable to Weight Watchers International, Inc.	$ 220,944	$ 180,167	$ 77,844

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN TOTAL DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Weilos	Redeemable Noncontrolling Interest	Common Stock	Common StockWeilos	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained EarningsWeilos
Beginning Balance at Jan. 02, 2016	$ (1,290,158)		$ 4,450	$ 0		$ (3,247,406)	$ (37,265)	$ 1,994,513
Beginning balance (in shares) at Jan. 02, 2016				118,855		55,301
Comprehensive income	77,844		249				10,145	67,699
Issuance of treasury stock under stock plans	(2,113)					$ 10,060		(12,173)
Issuance of treasury stock under stock plans (in shares)						(280)
Tax benefit of restricted stock units vested and stock options exercised	327							327
Compensation expense on share-based awards	6,527							6,527
Stock issued business acquisition value		$ 0							$ 0
Stock issued business acquisition value (in shares)					92
Ending balance at Dec. 31, 2016	(1,207,573)		4,699	$ 0		$ (3,237,346)	(27,120)	2,056,893
Ending balance (in shares) at Dec. 31, 2016				118,947		55,021
Comprehensive income	180,167		(232)				16,653	163,514
Issuance of treasury stock under stock plans	(3,529)					$ 28,510		(32,039)
Issuance of treasury stock under stock plans (in shares)						(763)
Compensation expense on share-based awards	14,949							14,949
Ending balance at Dec. 30, 2017	(1,015,986)		4,467	$ 0		$ (3,208,836)	(10,467)	2,203,317
Ending balance (in shares) at Dec. 30, 2017				118,947		54,258
Comprehensive income	220,944		(554)				(2,805)	223,749
Issuance of treasury stock under stock plans	2,594					$ 33,212		(30,618)
Issuance of treasury stock under stock plans (in shares)						(862)
Compensation expense on share-based awards	20,188							20,188
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 Dec. 29, 2018	$ (808,943)		$ 3,913	$ 0		$ (3,175,624)	$ (15,757)	$ 2,382,438
Ending balance (in shares) at Dec. 29, 2018				120,352		53,396

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Operating activities:
Net income	$ 223,568	$ 163,317	$ 67,493
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	44,061	50,880	52,633
Amortization of deferred financing costs and debt discount	8,539	6,112	6,116
Goodwill impairment	0	13,323	0
Impairment of intangible and long-lived assets	27	682	615
Write-off of net assets due to cessation of Spain operations	0	70	0
Share-based compensation expense	20,188	14,949	6,527
Deferred tax (benefit) provision	(13,673)	(48,216)	11,093
Allowance for doubtful accounts	130	(587)	363
Reserve for inventory obsolescence	7,906	7,823	5,109
Foreign currency exchange rate loss	2,036	202	1,270
Early extinguishment of debt, net	0	8,969	0
Changes in cash due to:
Receivables	(7,999)	5,444	(37)
Inventories	(1,148)	(4,504)	(9,513)
Prepaid expenses	(3,991)	(4,359)	(14,755)
Accounts payable	2,224	(14,507)	461
Accrued liabilities	16,600	4,414	(8,823)
Deferred revenue	(17,198)	8,298	1,212
Other long term assets and liabilities, net	(13,001)	5,683	1,512
Income taxes	27,323	4,281	(2,232)
Cash provided by operating activities	295,592	222,274	119,044
Investing activities:
Capital expenditures	(19,050)	(13,732)	(5,556)
Capitalized software expenditures	(27,763)	(26,916)	(28,785)
Cash paid for acquisitions	(7,100)	0	(2,898)
Other items, net	(10,045)	(143)	(291)
Cash used for investing activities	(63,958)	(40,791)	(37,530)
Financing activities:
Net (payments) borrowings on revolver	(25,000)	25,000	(48,000)
Proceeds from new long term debt	0	1,840,000	0
Financing costs and debt discount	0	(53,636)	0
Payments on long-term debt	(57,750)	(2,018,773)	(165,323)
Taxes paid related to net share settlement of equity awards	(25,020)	(9,548)	0
Excess tax benefit of share-based compensation	0	0	973
Proceeds from stock options exercised	33,417	5,475	139
Payment of dividends	0	0	(11)
Cash used for financing activities	(74,353)	(211,482)	(212,222)
Effect of exchange rate changes on cash and cash equivalents	(3,361)	4,397	(2,162)
Net increase (decrease) in cash and cash equivalents	153,920	(25,602)	(132,870)
Cash and cash equivalents, beginning of fiscal year	83,054	108,656	241,526
Cash and cash equivalents, end of fiscal year	$ 236,974	$ 83,054	$ 108,656

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 29, 2018
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 + “pay-as-you-go” members. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and 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. Out-of-Period Adjustments: In fiscal 2016, the Company identified and recorded out-of-period adjustments related to (i) income tax errors primarily related to reversing a foreign tax receivable originally recorded in fiscal 2008 that should have been reversed in fiscal 2009; (ii) errors in the prior period tax provision identified upon filing of the tax return and (iii) technology expenses that should have been capitalized in fiscal 2015. The impact of correcting these errors, which were immaterial to prior period financial statements and corrected in fiscal 2016, increased income before income taxes by $347, increased provision for income taxes by $2,138 and decreased net income attributable to the Company by $1,791.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 29, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Fiscal Year: The Company’s fiscal year ends on the Saturday closest to December 31 st Use of Estimates: The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates and judgments, including those related to inventories, the impairment analysis for goodwill and other indefinite-lived intangible assets, share-based compensation, income taxes, tax contingencies and litigation. The Company bases its estimates on historical experience and on various other factors and assumptions that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual amounts could differ from these estimates. Translation of Foreign Currencies: For all foreign operations, the functional currency is the local currency. Assets and liabilities of these operations are translated into US dollars using the exchange rate in effect at the end of each reporting period. Income statement accounts are translated at the average rate of exchange prevailing during each reporting period. Translation adjustments arising from the use of differing exchange rates from period to period are included in accumulated other comprehensive loss. Foreign currency gains and losses arising from the translation of intercompany receivables and intercompany payables with the Company’s international subsidiaries are recorded as a component of other expense, net, unless the receivable or payable is considered long-term in nature, in which case the foreign currency gains and losses are recorded as a component of accumulated other comprehensive loss. Cash Equivalents: Cash and cash equivalents are defined as highly liquid investments with original maturities of three months or less. Cash balances may, at times, exceed insurable amounts. The Company believes it mitigates this risk by investing in or through major financial institutions. Cash includes balances due from third-party credit card companies. Inventories: Inventories, which consist of finished goods, are stated at the lower of cost or net realizable value on a first-in, first-out basis, net of reserves for obsolescence and shrinkage. Property and Equipment: Property and equipment are recorded at cost. For financial reporting purposes, equipment is depreciated on the straight-line method over the estimated useful lives of the assets (3 to 10 years). Leasehold improvements are amortized on the straight-line method over the shorter of the term of the lease or the useful life of the related assets. Expenditures for new facilities and improvements that substantially extend the useful life of an asset are capitalized. Ordinary repairs and maintenance are expensed as incurred. When assets are retired or otherwise disposed of, the cost and related depreciation are removed from the accounts and any related gains or losses are included in income. Impairment of Long Lived Assets: The Company reviews long-lived assets, including amortizable intangible assets, for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. In fiscal 2018, fiscal 2017 and fiscal 2016, the Company recorded impairment charges of $0, $674 and $484, respectively, related to internal-use computer software that was not expected to provide substantive service potential. In fiscal 2018, fiscal 2017 and fiscal 2016, the Company recorded impairment charges of $27, $8 and $131, respectively, related to property, plant and equipment that were expected to be disposed of before the end of their estimated useful lives. Goodwill and Franchise Rights Acquired: The Company reviews goodwill and other indefinite-lived intangible assets, including franchise rights acquired with indefinite lives, for potential impairment on at least an annual basis or more often if events so require. The Company performed fair value impairment testing as of May 6, 2018 and May 7, 2017, each the first day of fiscal May, on its goodwill and other indefinite-lived intangible assets. In addition, for the Company’s Brazil reporting unit only, given the ongoing challenging economic environment, the negative performance trends and the Company’s reduced expectations regarding the future impact of its business growth strategies in the country, the Company performed an interim goodwill impairment analysis at December 30, 2017. In performing the interim goodwill impairment analysis for its Brazil reporting unit, the Company recorded a $13,323 impairment charge at December 30, 2017. In performing its annual impairment analysis as of May 6, 2018 and May 7, 2017, the Company determined that the carrying amounts of its goodwill reporting units and franchise rights acquired with indefinite lives units of account did not exceed their respective fair values and therefore, no impairment existed. For all reporting units, except for Brazil, there was significant headroom in the impairment analysis. Based on the results of the Company’s annual impairment test performed for all of its reporting units except for Brazil, as of the December 29, 2018 balance sheet date, the Company estimated that for reporting units that hold approximately 97.0% of the Company’s goodwill, those units had a fair value at least 50 impairment test performed for its Brazil reporting unit is When determining fair value, the Company utilizes various assumptions, including projections of future cash flows, growth rates and discount rates. A change in these underlying assumptions would cause a change in the results of the tests and, as such, could cause fair value to be less than the carrying amounts and result in an impairment of those assets. In the event such a result occurred, the Company would be required to record a corresponding charge, which would impact earnings. The Company would also be required to reduce the carrying amounts of the related assets on its balance sheet. The Company continues to evaluate these assumptions and believes that these assumptions are appropriate. The following is a discussion of the goodwill and franchise rights acquired impairment analysis. Goodwill In performing the impairment analysis for goodwill, the fair value for the Company’s reporting units is estimated using a discounted cash flow approach. This approach involves projecting future cash flows attributable to the reporting unit and discounting those estimated cash flows using an appropriate discount rate. The estimated fair value is then compared to the carrying value of the reporting units. The Company has determined the appropriate reporting unit for purposes of assessing annual impairment to be the country for all reporting units. For all of the Company’s reporting units except for Brazil (see below), the Company estimated future cash flows by utilizing the historical debt-free cash flows (cash flows provided by operating activities less capital expenditures) attributable to that country and then applied expected future operating income growth rates for such country. The Company utilized operating income as the basis for measuring its potential growth because it believes it is the best indicator of the performance of its business. The Company then discounted the estimated future cash flows utilizing a discount rate which was calculated using the average cost of capital, which included the cost of equity and the cost of debt. The cost of equity was determined by combining a risk-free rate of return and a market risk premium for the Company’s peer group. The risk-free rate of return was determined based on the average rate of long-term U.S. Treasury securities. The market risk premium was determined by reviewing external market data. The cost of debt was determined by estimating the Company’s current borrowing rate. As it relates to the impairment analysis for Brazil, the Company estimated future debt free cash flows in contemplation of its growth strategies for that market. In developing these projections, the Company considered the historical impact of similar growth strategies in other markets as well as the current market conditions in Brazil. The Company then discounted the estimated future cash flows utilizing a discount rate which was calculated using the average cost of capital, which included the cost of equity and the cost of debt. The cost of equity was determined by combining a risk-free rate of return and a market risk premium for the Company’s peer group. The risk-free rate of return was determined based on the average rate of long-term U.S. Treasury securities. The market risk premium was determined by reviewing external market data including the current economic conditions in Brazil and the country specific risk thereon. A further risk premium was included to reflect the risk associated with the significantly higher growth rates projected in the May 7, 2017 annual impairment test. The cost of debt was determined by estimating the Company’s current borrowing rate. The book values of goodwill in the United States, Canada, Brazil and other countries at December 29, 2018 were $98,857, $39,300, $4,584 and $9,778, respectively, totaling $152,519 and the values at December 30, 2017 were $97,755, $42,634, $5,372 and $10,520, respectively, totaling $156,281. Franchise Rights Acquired Finite-lived franchise rights acquired are amortized over the remaining contractual period, which is generally less than one year. Indefinite-lived franchise rights acquired are tested on an annual basis for impairment. In performing the impairment analysis for indefinite-lived franchise rights acquired, the fair value for franchise rights acquired is estimated using a discounted cash flow approach referred to as the hypothetical start-up approach for franchise rights related to the Company’s Studio + Digital business and a relief from royalty methodology for franchise rights related to the Company’s Digital business. The aggregate estimated fair value for these rights is then compared to the carrying value of the unit of account for those franchise rights. The Company has determined the appropriate unit of account for purposes of assessing impairment to be the combination of the rights in both the Studio + Digital business and the Digital business in the country in which the acquisitions have occurred. The book values of these franchise rights in the United States, Canada, United Kingdom, Australia, and New Zealand at December 29, 2018 were $671,914, $52,919, $11,441, $6,327 and $4,747, respectively, totaling $747,348 and the values at December 30, 2017 were $671,914, $57,408, $12,680, $7,018 and $5,020, respectively, totaling $754,040. In its hypothetical start-up approach analysis for fiscal 2018, the Company assumed that the year of maturity was reached after 7 years. Subsequent to the year of maturity, the Company estimated future cash flows for the Studio + Digital business in each country based on assumptions regarding revenue growth and operating income margins. The cash flows associated with the Digital business were based on the expected Digital revenue for such country and the application of a market-based royalty rate. The cash flows for the Studio + Digital and Digital businesses were discounted utilizing rates consistent with those utilized in the goodwill impairment analysis. Other Intangible Assets: Other finite-lived intangible assets are amortized using the straight-line method over their estimated useful lives of 3 to 20 years. The Company expenses all software costs (including website development costs) incurred during the preliminary project stage and capitalizes all internal and external direct costs of materials and services consumed in developing software (including website development costs) once the development has reached the application development stage. Application development stage costs generally include software configuration, coding, installation to hardware and testing. These costs are amortized over their estimated useful life of 3 years for website development costs and from 3 to 5 years for all other software costs. All costs incurred for upgrades, maintenance and enhancements, including the cost of website content, which do not result in additional functionality, are expensed as incurred. Revenue Recognition: WW earns revenue from subscriptions for the Company’s 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. WW 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 is 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, WW 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. Advertising Costs: Advertising costs consist primarily of broadcast and digital media. All costs related to advertising are expensed in the period incurred, except for media production-related costs, which are expensed the first time the advertising takes place. Total advertising expenses for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, were $218,062, $193,423 and $186,614, respectively. Income Taxes: Deferred income tax assets and liabilities result primarily from temporary differences between the financial statement and tax bases of assets and liabilities, using enacted tax rates in effect for the year in which differences are expected to reverse. If it is more-likely-than-not that some portion of a deferred tax asset will not be realized, a valuation allowance is recognized. The Company considers historic levels of income, estimates of future taxable income and feasible tax planning strategies in assessing the need for a tax valuation allowance. The Company recognizes a benefit for uncertain tax positions when a tax position taken or expected to be taken in a tax return is more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The Company recognizes accrued interest and penalties associated with uncertain tax positions as part of the provision for income taxes on its consolidated statements of net income. In addition, assets and liabilities acquired in purchase business combinations are assigned their fair values and deferred taxes are provided for lower or higher tax bases. Derivative Instruments and Hedging: The Company is exposed to certain risks related to its ongoing business operations, primarily interest rate risk and foreign currency risk. An interest rate swap was entered into to hedge a portion of the cash flow exposure associated with the Company’s variable-rate borrowings. The Company does not use any derivative instruments for trading or speculative purposes. The Company recognizes the fair value of all derivative instruments as either assets or liabilities on the balance sheet. The Company has designated and accounted for the interest rate swap as cash flow hedges of its variable-rate borrowings. For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of accumulated other comprehensive loss and reclassified into earnings in the periods during which the hedged transactions affect earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. The fair value of the Company’s interest rate swap is reported as a component of accumulated other comprehensive loss on its balance sheet. See Note 17 for a further discussion regarding the fair value of the Company’s interest rate swap. The net effect of the interest payable and receivable under the Company’s interest rate swap is included in interest expense on the consolidated statements of net income. Deferred Financing Costs: Deferred financing costs consist of fees paid by the Company as part of the establishment, exchange and/or modification of the Company’s long-term debt. During the fourth quarter of fiscal 2017, the Company incurred fees of $53,832 (which includes $30,800 of a debt discount) in connection with the November 2017 debt refinancing (as described in Note 8). In addition, the Company recorded a loss on extinguishment of debt of $10,524 in connection thereto. This early extinguishment of debt write-off was comprised of $5,716 of deferred financing fees paid in connection with the November 2017 debt refinancing and $4,808 of pre-existing deferred financing fees. During the fiscal year ended December 30, 2017 in connection with the prepayment of debt, the Company wrote-off deferred financing fees of $618, incurred fees of $305 and recorded a gain on early extinguishment of debt of $1,554, inclusive of these fees. Amortization expense for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $8,539, $6,112 and $6,116, respectively. Accumulated Other Comprehensive Loss: The Company’s accumulated other comprehensive loss includes changes in the fair value of derivative instruments and the effects of foreign currency translations. At December 29, 2018, December 30, 2017 and December 31, 2016, the cumulative balance of changes in fair value of derivative instruments, net of taxes, was $1,175, $5,392 and $16,002, respectively. At December 29, 2018, December 30, 2017 and December 31, 2016, the cumulative balance of the effects of foreign currency translations, net of taxes, was $14,582, $5,075 and $11,118, respectively.

Accounting Standards Adopted in

Accounting Standards Adopted in Current Year	12 Months Ended
	Dec. 29, 2018
Accounting Changes And Error Corrections [Abstract]
Accounting Standards Adopted in Current Year	3. In March 2016, the Financial Accounting Standards Board (the “FASB”) issued updated guidance on revenue from contracts with customers, which is intended to clarify the implementation guidance on principal versus agent considerations. The amendments in this update do not change the core principle of the guidance, but are intended to improve the operability and understandability of the implementation guidance on principal versus agent considerations by including indicators to assist an entity in determining whether it controls a specified good or service before it is transferred to the customer. In April 2016, the FASB issued updated guidance on revenue from contracts with customers, which is intended to clarify guidance related to identifying performance obligations and licensing implementation guidance contained in the new revenue recognition standard. In May 2016, the FASB issued updated guidance on revenue from contracts with customers, which is intended to provide narrow scope guidance and practical expedients contained in the new revenue standard. In December 2016, the FASB issued updated guidance on revenue from contracts with customers for technical corrections and improvements on narrow aspects within the original and amended guidance. The amendments in these updates are effective for annual periods beginning after December 15, 2017 and interim periods within those fiscal years, with early adoption permitted. On the first day of the first quarter of fiscal 2018, the Company adopted the updated guidance on revenue from contracts with customers on a modified retrospective basis. See Note 4 for further details In October 2016, the FASB issued updated guidance on intra-equity transfers of assets other than inventory which is intended to improve the accounting for income tax consequences by eliminating the deferral of tax effects of intra-entity asset transfers other than inventory within the consolidated entity. The current guidance to defer the recognition of any tax impact on the transfer of inventory within the consolidated entity until it is sold to a third party remains unaffected. The updated guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those fiscal years, with early adoption permitted. The updated guidance must be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company adopted this guidance the first day of the first quarter of 2018, and as a result, recorded a net deferred tax liability with a corresponding cumulative adjustment to decrease retained earnings of $46,927 associated with an intra-entity transfer of certain intellectual property rights related to the Company’s non-U.S. business to its Canadian entity. Before the to retained earnings was necessary. In February 2018, the FASB issued updated guidance on tax effects of items within accumulated other comprehensive income resulting from Tax Cuts and Jobs Act of 2017 (the “2017 Tax Act”). This update eliminates the stranded tax effects from the Act and permits a company to make an accounting policy election to reclassify those effects from accumulated other comprehensive income (“AOCI”) to retained earnings. The updated guidance is effective for the Company beginning in the first quarter of fiscal 2019 and early adoption is permitted. The Company adopted this guidance the first day of the first quarter of fiscal 2018, and the election was made to reclassify the income tax effects of the 2017 Tax Act from accumulated other comprehensive loss to retained earnings, resulting in a $2,485 increase to retained earnings in the consolidated balance sheet. There were no other income tax effects related to the application of the 2017 Tax Act with the adoption of this updated guidance. In March 2018, the FASB issued guidance pursuant to the amendments issued by the staff of the U.S. Securities and Exchange Commission . the in the fourth quarter of fiscal 2017 and completed the accounting of the 2017 Tax Act in the fourth 12 In June 2018, the FASB issued updated guidance regarding share-based payment transactions for acquiring goods and services from nonemployees. The updated guidance applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. 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, but no earlier than an entity’s adoption date of the revenue guidance. The updated guidance is effective for the Company beginning in the first quarter of fiscal 2019. The Company early adopted this guidance during the third quarter of 2018. The adoption of this guidance had no impact on the consolidated financial statements.

Revenue

Revenue	12 Months Ended
	Dec. 29, 2018
Revenue From Contract With Customer [Abstract]
Revenue	4. 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 on or 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. See Note 2 for further information on the Company’s revenue recognition policies. The following table presents the Company’s revenues disaggregated by revenue source: Fiscal Year Ended December 29, December 30, December 31, 2018 2017 2016 Digital Subscription Revenues $ 567,767 $ 416,722 $ 343,789 Studio + Digital Fees 705,429 664,957 605,332 Service revenues, net $ 1,273,196 $ 1,081,679 $ 949,121 Product sales and other, net 240,925 225,232 215,781 Revenues, net $ 1,514,121 $ 1,306,911 $ 1,164,902 The following tables present the Company’s revenues disaggregated by segment: Fiscal Year Ended December 29, 2018 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 378,678 $ 149,571 $ 25,557 $ 13,961 $ 567,767 Studio + Digital Fees 522,372 107,528 52,676 22,853 705,429 Service revenues, net $ 901,050 $ 257,099 $ 78,233 $ 36,814 $ 1,273,196 Product sales and other, net 146,201 47,226 28,839 18,659 240,925 Revenues, net $ 1,047,251 $ 304,325 $ 107,072 $ 55,473 $ 1,514,121 Fiscal Year Ended December 30, 2017 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 281,432 $ 102,039 $ 21,477 $ 11,774 $ 416,722 Studio + Digital Fees 493,800 93,723 52,161 25,273 664,957 Service revenues, net $ 775,232 $ 195,762 $ 73,638 $ 37,047 $ 1,081,679 Product sales and other, net 135,117 43,461 26,351 20,303 225,232 Revenues, net $ 910,349 $ 239,223 $ 99,989 $ 57,350 $ 1,306,911 Fiscal Year Ended December 31, 2016 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 239,145 $ 75,014 $ 18,780 $ 10,850 $ 343,789 Studio + Digital Fees 437,239 89,646 54,473 23,974 605,332 Service revenues, net $ 676,384 $ 164,660 $ 73,253 $ 34,824 $ 949,121 Product sales and other, net 122,443 45,930 27,555 19,853 215,781 Revenues, net $ 798,827 $ 210,590 $ 100,808 $ 54,677 $ 1,164,902 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 30, 2017 $ 74,332 $ 2,049 Adoption of accounting standard (3,501 ) 0 Net decrease during the period (17,330 ) (1,088 ) Balance as of December 29, 2018 $ 53,501 $ 961 Revenue recognized from amounts included in current deferred revenue as of December 30, 2017 was $70,625 for the fiscal year ended December 29, 2018. The Company’s long-term deferred revenue, which is included in other liabilities on the Company’s consolidated balance sheet, had a balance of $961 at December 29, 2018 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

Acquisitions

Acquisitions	12 Months Ended
	Dec. 29, 2018
Business Combinations [Abstract]
Acquisitions	5. Acquisitions Acquisition of Kurbo Health, Inc. On August 10, 2018, the Company acquired substantially all of the assets of Kurbo Health, Inc. (“Kurbo”), a family-based healthy lifestyle coaching program, for a net purchase price of $3,063. Payment was in the form of cash. The total purchase price of Kurbo has been allocated to goodwill ($1,101), website development ($1,916), prepaid expenses ($78) and other assets ($32) partially offset by deferred revenue ($57) and other liabilities ($7). The acquisition of Kurbo has been accounted for under the purchase method of accounting and, accordingly, earnings of Kurbo have been included in the consolidated operating results of the Company since the date of acquisition. The goodwill will be deductible annually for tax purposes. Acquisition of Franchisees On December 10, 2018, the Company acquired substantially all of the assets of its franchisee for certain territories in South Carolina, At Goal, Inc., for a purchase price of $4,000 (the “South Carolina Acquisition”). Payment was in the form of cash ($4,000) and assumed net liabilities ($37). The total purchase price has been allocated to franchise rights acquired ($3,791) and customer relationship value ($209). The acquisition of the franchisee has been accounted for under the purchase method of accounting and, accordingly, earnings of the acquired franchisee have been included in the consolidated operating results of the Company since the date of acquisition. On June 27, 2016, the Company acquired substantially all of the assets of its franchisee for certain territories in South Florida, Weight Watchers of Greater Miami, Inc., for a purchase price of $3,250 (the “Miami Acquisition”). Payment was in the form of cash ($2,898) plus cash in reserves ($300) and assumed net liabilities of ($52). The total purchase price has been allocated to franchise rights acquired ($114), goodwill ($2,945) and customer relationship value ($191). The acquisition of the franchisee has been accounted for under the purchase method of accounting and, accordingly, earnings of the acquired franchisee have been included in the consolidated operating results of the Company since the date of acquisition. The goodwill will be deductible for tax purposes.

Franchise Rights Acquired, Good

Franchise Rights Acquired, Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 29, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Franchise Rights Acquired, Goodwill and Other Intangible Assets	6. Franchise Rights Acquired, Goodwill and Other Intangible Assets The Company performed its annual impairment review of goodwill and other indefinite-lived intangible assets for fiscal 2018 and fiscal 2017 on May 6 and May 7, respectively. In addition, for the Company’s Brazil reporting unit only, given the ongoing challenging economic environment, the negative performance trends and the Company’s reduced expectations regarding the future impact of its business growth strategies in the country, the Company performed an interim goodwill impairment analysis at December 30, 2017. In performing its annual impairment analysis as of May 6, 2018 and May 7, 2017, the Company determined that the carrying amounts of its goodwill reporting units and franchise rights acquired with indefinite lives units of account did not exceed their respective fair values and therefore, no impairment existed 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 fiscal year ended December 29, 2018, the change in the carrying value of franchise rights acquired is due to the franchisee acquisitions as described in Note 5 and the effect of exchange rate changes. Goodwill primarily relates to the acquisition of the Company by H.J. Heinz Company in 1978 and the Company’s acquisition of WeightWatchers.com, Inc. in 2005, acquisitions of the Company’s franchised territories, acquisitions of the majority interest in Vigilantes do Peso Marketing Ltda. (“VPM”) and of Knowplicity, Inc., d/b/a Wello, in fiscal 2014 and the acquisition of Weilos, Inc. in fiscal 2015. See Note 5 for additional information about acquisitions by the Company. For the fiscal year ended December 29, 2018, the change in the carrying amount of goodwill is due to the Kurbo acquisition, a franchise acquisition and the effect of exchange rate changes as follows: North Continental United America Europe Kingdom Other Total Balance as of December 30, 2017 $ 140,389 $ 7,759 $ 1,253 $ 6,880 $ 156,281 Goodwill acquired during the period 1,101 0 0 0 1,101 Effect of exchange rate changes (3,334 ) (517 ) (75 ) (937 ) (4,863 ) Balance as of December 29, 2018 $ 138,156 $ 7,242 $ 1,178 $ 5,943 $ 152,519 Finite-lived Intangible Assets The below table reflects the carrying values of finite-lived intangible assets as of December 29, 2018 and December 30, 2017: December 29, 2018 December 30, 2017 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Amount Amortization Capitalized software costs $ 121,508 $ 102,659 $ 111,617 $ 94,697 Website development costs 105,710 77,825 90,096 61,125 Trademarks 11,620 11,010 11,231 10,833 Other 13,967 4,149 3,793 3,546 Trademarks and other intangible assets $ 252,805 $ 195,643 $ 216,737 $ 170,201 Franchise rights acquired 8,110 4,319 4,526 4,526 Total finite-lived intangible assets $ 260,915 $ 199,962 $ 221,263 $ 174,727 Aggregate amortization expense for finite-lived intangible assets was recorded in the amounts of $28,995, $36,040 and $35,752, for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. The franchise rights acquired related to the VPM acquisition were amortized ratably over a 2 year period. The franchise rights acquired related to the Miami Acquisition were amortized ratably over a 3 month period. The franchise rights acquired related to the South Carolina Acquisition will be amortized ratably over an 18 year period. Estimated amortization expense of existing finite-lived intangible assets for the next five fiscal years and thereafter is as follows: Fiscal 2019 $ 23,689 Fiscal 2020 $ 16,232 Fiscal 2021 $ 7,971 Fiscal 2022 $ 1,641 Fiscal 2023 and thereafter $ 11,420

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 29, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	7. The below table reflects the carrying values of property and equipment as of December 29, 2018 and December 30, 2017: December 29, December 30, 2018 2017 Equipment $ 75,531 $ 70,126 Leasehold improvements 80,002 71,469 155,533 141,595 Less: Accumulated depreciation and amortization (103,331 ) (93,617 ) $ 52,202 $ 47,978 Depreciation and amortization expense of property and equipment for the fiscal years ended December 29, 2018, December 30, 2017, and December 31, 2016 was $15,066, $14,840 and $16,881, respectively.

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 29, 2018
Debt Disclosure [Abstract]
Long-Term Debt	8. The components of the Company’s long-term debt were as follows: December 29, 2018 December 30, 2017 Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) New Revolving Credit Facility due November 29, 2022 $ 0 $ 0 $ 0 4.39 % $ 25,000 $ 0 $ 0 4.15 % Former Tranche B-2 Term Facility due April 2, 2020 0 0 0 0.00 % 0 0 0 4.76 % New Term Loan Facility due November 29, 2024 1,482,250 8,307 26,033 7.53 % 1,540,000 9,783 30,433 6.84 % Notes due December 1, 2025 300,000 1,202 0 8.69 % 300,000 1,422 0 8.82 % Total $ 1,782,250 $ 9,509 $ 26,033 7.63 % $ 1,865,000 $ 11,205 $ 30,433 4.96 % Less: Current Portion 77,000 82,750 Unamortized Deferred Financing Costs 9,509 11,205 Unamortized Debt Discount 26,033 30,433 Total Long-Term Debt $ 1,669,708 $ 1,740,612 (1) Includes amortization of deferred financing costs and debt discount. For fiscal 2017, the effective interest rate for the tranche B-2 term facility of the Company’s then-existing term loan facility was computed based on interest expense incurred over the period for which borrowings were outstanding 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 “New 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 he Company incurred fees of $53,832 (which included $30,800 of a debt discount) in connection with the November 2017 debt refinancing. In addition, the Company recorded a loss on early extinguishment of debt of $10,524 in connection thereto. This early extinguishment of debt write-off was comprised of $5,716 of deferred financing fees paid in connection with the November 2017 debt refinancing and $4,808 of pre-existing deferred financing fees. Senior Secured Credit Facilities The New 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 New Credit Facilities consist of (1) $1,540,000 in aggregate principal amount of senior secured tranche B term loans due in 2024 (the “New 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 “New Revolving Credit Facility”). As of December 29, 2018, the Company had $1,482,250 of debt outstanding under the New Credit Facilities, with $148,841 of availability and $1,159 in issued but undrawn letters of credit outstanding under the New Revolving Credit Facility. The outstanding balance as of December 30, 2017 of $25,000 under the New Revolving Credit Facility was included in the current portion of long-term debt due to the Company’s then intent to repay its borrowings within twelve months on the accompanying consolidated balance sheet included in these consolidated financial statements. There was no outstanding balance under the New Revolving Credit Facility as of December 29, 2018. 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 Leverage Ratio (as defined 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 New 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 New 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 New 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 December 29, 2018, the applicable margins for the LIBOR rate borrowings under the New Term Loan Facility and the New Revolving Credit Facility were 4.75% and 2.25%, respectively. On a quarterly basis, the Company pays a commitment fee to the lenders under the New Revolving Credit Facility in respect of unutilized commitments thereunder, which commitment fee fluctuates depending upon the Company’s Consolidated Leverage Ratio. Based on the Company’s Consolidated Leverage Ratio as of December 29, 2018, the commitment fee was 0.35% per annum. 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 New Revolving Credit Facility includes a maintenance covenant that will require, in certain circumstances, compliance with certain first lien secured net leverage ratios. As of December 29, 2018, the Company was in compliance with all applicable financial covenants in the Credit Agreement governing the New 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 New Credit Facilities. Outstanding Debt At At December 29, 2018 and December 30, 2017, 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 18 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 7.73% Maturities At December 29, 2018, the aggregate amounts of the Company’s existing long-term debt maturing in each of the next five fiscal years and thereafter were as follows: 2019 $ 77,000 2020 96,250 2021 77,000 2022 77,000 2023 77,000 2024 and thereafter 1,378,000 $ 1,782,250

Treasury Stock

Treasury Stock	12 Months Ended
	Dec. 29, 2018
Class Of Stock Disclosures [Abstract]
Treasury Stock	9. On October 9, 2003, the Company’s Board of Directors authorized and the Company announced a program to repurchase up to $250,000 of the Company’s outstanding common stock. On each of June 13, 2005, May 25, 2006 and October 21, 2010, the Company’s Board of Directors authorized and the Company announced adding $250,000 to the program. The repurchase program allows for shares to be purchased from time to time in the open market or through privately negotiated transactions. No shares will be purchased from Artal Holdings Sp. z o.o., Succursale de Luxembourg and its parents and subsidiaries under the program. The repurchase program currently has no expiration date. During the fiscal years ended December 29, 2018, December 30, 2017, and December 31, 2016, the Company purchased no shares of its common stock in the open market under the repurchase program. As of the end of fiscal 2018, $208,933 remained available to purchase shares of the Company’s common stock under the repurchase program.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 29, 2018
Earnings Per Share [Abstract]
Earnings Per Share	10. 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 EPS for the fiscal years ended: December 29, December 30, December 31, 2018 2017 2016 Numerator: Net income attributable to Weight Watchers International, Inc. $ 223,749 $ 163,514 $ 67,699 Denominator: Weighted average shares of common stock outstanding 66,280 64,329 63,742 Effect of dilutive common stock equivalents 3,835 3,919 2,155 Weighted average diluted common shares outstanding 70,115 68,248 65,897 Earnings per share attributable to Weight Watchers International, Inc. Basic $ 3.38 $ 2.54 $ 1.06 Diluted $ 3.19 $ 2.40 $ 1.03 The number of anti-dilutive common stock equivalents excluded from the calculation of the weighted average number of common shares for diluted EPS was 419,

Stock Plans

Stock Plans	12 Months Ended
	Dec. 29, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Plans	11. Incentive Compensation Plans and Inducement Option 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 Board of Directors or a committee thereof administers the 2014 Plan. Under the 2014 Plan, grants may take the following forms at the Company’s Board of Directors’ Compensation and Benefit Committee’s (the “Compensation Committee”) discretion: non-qualified stock options, incentive stock options, stock appreciation rights, restricted stock units (“RSUs”), restricted stock and other stock-based awards. As of May 9, 2017, the maximum number of shares of common stock available for grant under the 2014 Plan was 8,500, subject to increase and adjustment as set forth in the 2014 Plan. Under the 2014 Plan, the Company also grants fully-vested shares of its common stock to certain members of its Board of Directors. Additionally, the Company granted such shares to director members of the Interim Office of the Chief Executive Officer. While these shares are fully vested, the directors are restricted from selling these shares while they are still serving on the Company’s Board of Directors. During the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, the Company granted to members of the Company’s Board of Directors an aggregate of 11, 30 and 36 fully-vested shares, respectively, and recognized compensation expense of $754, $664 and $451, respectively. During the fiscal year ended December 30, 2017, the Company granted to director members of the Interim Office of the Chief Executive Officer an aggregate of 40 fully vested shares and recognized compensation expense of $604. In fiscal 2017, as part of an initial equity award, the Company granted a stock option to purchase 500 shares of its common stock (the “Inducement Option”) to its new President and Chief Executive Officer upon commencement of her employment. The Inducement Option vests proportionately over four years on each anniversary of the grant date and expires on the seven-year anniversary of the grant date. While the Inducement Option was granted in reliance on an employment inducement exemption and not awarded pursuant to the 2014 Plan, it is subject to the same terms and conditions of the 2014 Plan. 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. From time to time, the Company has granted fully-vested shares of its common stock to individuals in connection with special circumstances. The Company issues common stock for share-based compensation awards from treasury stock. The total compensation cost that has been charged against income for share-based compensation awards was $20,188, $14,949 and $6,527 for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. Such amounts have been included as a component of selling, general and administrative expenses. The total income tax benefit recognized in the income statement for all share-based compensation awards was $4,007, $3,580 and $1,849 for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. The tax benefits realized from options exercised and RSUs and PSUs vested totaled $30,268, $7,210 and $2,114 for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. No compensation costs were capitalized. As of December 29, 2018, there was $41,496 of total unrecognized compensation cost related to the Inducement Option and stock options, RSUs and PSUs granted under the Stock Plans. That cost is expected to be recognized over a weighted-average period of approximately 1.6 years. Stock Option Awards Under Stock Plans and Inducement Option Stock Option Awards with Time-Vesting Criteria Stock options with time-vesting criteria (“Time-Vesting Options”) are exercisable based on the terms and conditions outlined in the applicable award agreement. Time-Vesting Options outstanding at December 29, 2018, December 30, 2017 and December 31, 2016 vest over a period of three to five years and the expiration term is seven to ten years. Time-Vesting Options outstanding at December 29, 2018, December 30, 2017 and December 31, 2016 have an exercise price between $3.97 and $63.59 per share. The Company did not grant Time-Vesting Options in fiscal 2018. The fair value of each of these option awards is estimated on the date of grant using the Black-Scholes option pricing model with the weighted average assumptions noted in the following table. Expected volatility is based on the historical volatility of the Company’s common stock. Since the Company’s option exercise history is limited, it has estimated the expected term of these options (other than the options with a seven-year term) to be the midpoint between the vesting period and the contractual term of each option. For options with a seven-year contractual term, the expected term is equal to 7 years. The risk-free interest rate is based on the U.S. Treasury yield curve in effect on the date of grant which most closely corresponds to the expected term of the Time-Vesting Options. The dividend yield is based on the Company’s historic average dividend yield. December 30, December 31, 2017 2016 Dividend yield 0.0% 0.0% Volatility 51.3%-51.7% 49.6%-51.4% Risk-free interest rate 2.17% 1.24%-2.26% Expected term (years) 6.0-7.0 6.0 Option Activity A summary of all option activity under the Stock Plans and with respect to the Inducement Option and the previously disclosed Winfrey Option for the fiscal year ended December 29, 2018 is presented below: Weighted- Weighted- Average Average Remaining Aggregate Exercise Contractual Intrinsic Shares Price Life (Yrs.) Value Outstanding at December 30, 2017 5,884 $ 18.17 Granted 0 $ 0.00 Exercised (2,037 ) $ 11.89 Cancelled (58 ) $ 9.21 Outstanding at December 29, 2018 3,789 $ 21.69 6.2 $ 84,871 Exercisable at December 29, 2018 2,790 $ 13.27 6.5 $ 81,774 The weighted-average grant-date fair value of all options granted was $0.00, $15.21 and $5.79, for the fiscal years ended December 29, 2018, December 30, 2017, and December 31, 2016, respectively. The total intrinsic value of Time-Vesting Options exercised was $105,647, $5,930 and $117 for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. Cash received from Time-Vesting Options exercised during the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $33,385, $5,475 and $139, respectively. Restricted Stock Unit Awards with Time-Vesting Criteria RSUs are exercisable based on the terms outlined in the applicable award agreement. The RSUs generally vest over a period of two to four years. The fair value of RSUs is determined using the closing market price of the Company’s common stock on the date of grant. A summary of RSU activity under the Stock Plans for the fiscal year ended December 29, 2018 is presented below: Weighted-Average Grant-Date Fair Shares Value Outstanding at December 30, 2017 1,077 $ 24.22 Granted 274 $ 63.91 Vested (379 ) $ 22.38 Forfeited (91 ) $ 21.07 Outstanding at December 29, 2018 881 $ 37.91 The weighted-average grant-date fair value of RSUs granted was $63.91, $31.58 and $12.68 for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. The total fair value of RSUs vested during the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $8,484, $10,211 and $5,145, respectively. Performance-Based Stock Unit Awards with Time- and Performance-Vesting Criteria 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 will be satisfied if the Company has 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 both vesting criteria, shall be equal to (x) the target number of PSUs granted multiplied by (y) 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. The fair value of PSUs is determined using the closing market price of the Company’s common stock on the date of grant. A summary of PSU activity under the 2014 Plan for the fiscal year ended December 29, 2018 is presented below: Weighted-Average Grant-Date Fair Shares Value Outstanding at December 30, 2017 330 $ 19.42 Granted 81 $ 80.18 Vested 0 $ 0 Forfeited (31 ) $ 17.73 Outstanding at December 29, 2018 380 $ 32.56 The weighted-average grant-date fair value of PSUs granted was $80.18, $27.22 and $13.19 during the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively. No PSUs vested during the fiscal years ended December 29, 2018 and December 30, 2017. The total fair value of PSUs vested during the fiscal year ended December 31, 2016 was $8.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Income Taxes	12. In December 2017, the 2017 Tax Act was enacted. The 2017 Tax Act includes a number of changes to previous U.S. tax laws that impact the Company, most notably a reduction of the U.S. corporate income tax rate from 35% to 21% for tax years beginning after December 31, 2017. . Certain impacts of the 2017 Tax Act generally would have been required to be completed and incorporated into the Company’s fiscal 2017 year-end financial statements. However, due to the complexity of the 2017 Tax Act, the staff of the U.S. Securities and Exchange Commission issued guidance that provided companies with up to a one-year window to finalize the 2017 impact of this new legislation. The Company finalized its accounting related to the 2017 Tax Act during the fourth quarter of fiscal 2018. The impact on the Company’s fiscal 2018 results was a net tax benefit of $2,678, which is related to finalizing the provisional transition tax, and related foreign tax credits, originally recorded as of December 31, 2017. Additionally, proposed regulations were issued by the IRS throughout 2018. The Company expects these regulations to be finalized in 2019 and such updates, as well as the issuance of future regulations or notices by the IRS, may have an impact on the Company’s fiscal 2018 income tax provision. The Company will assess the impact of any additional guidance when it is issued. As of December 29, 2018, the Company has made a policy decision to elect to treat taxes due from GILTI as a current period expense. The following tables summarize the Company’s consolidated provision for U.S. federal, state and foreign taxes on income: December 29, December 30, December 31, 2018 2017 2016 Current: U.S. federal $ 1,235 $ 9,224 $ (15,254 ) State 5,918 1,993 604 Foreign 27,013 18,762 20,191 $ 34,166 $ 29,979 $ 5,541 Deferred: U.S. federal $ (10,367 ) $ (51,788 ) $ 10,980 State (2,566 ) 481 1,877 Foreign (740 ) 3,091 (1,764 ) $ (13,673 ) $ (48,216 ) $ 11,093 Total tax provision (benefit) $ 20,493 $ (18,237 ) $ 16,634 The components of the Company’s consolidated income before income taxes consist of the following: December 29, December 30, December 31, 2018 2017 2016 Domestic $ 126,171 $ 53,045 $ 26,367 Foreign 117,890 92,035 57,760 $ 244,061 $ 145,080 $ 84,127 The effective tax rates for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 were 8.4%, (12.6%) and 19.8%, respectively. The difference between the U.S. federal statutory tax rate and the Company’s consolidated effective tax rate is as follows: The Company’s effective tax rate for the fiscal year ended December 29, 2018 was affected by the following items: (i) a $25,353 tax benefit related to tax windfalls from stock compensation, (ii) a $8,535 tax benefit due to the reversal of a valuation allowance on foreign tax credit carryforwards now expected to be utilized, (iii) a $3,435 tax benefit due to the reversal of a valuation allowance on certain net operating losses that are now expected to be realized, (iv) a $3,430 tax benefit primarily related to the reversal of tax reserves resulting from the closure of various tax audits, (v) a $2,678 tax benefit related to favorable tax return adjustments due to the 2017 Tax Act, and (vi) a $1,858 tax benefit related to the cessation of operations of the Company’s Mexican subsidiary. The Company’s effective tax rate for the fiscal year ended December 30, 2017 was impacted by the 2017 Tax Act which benefited its tax expense by $56,560 and was comprised of the following items: (i) a $68,654 tax benefit related to the revaluation of deferred tax liabilities to reflect the decrease in the corporate tax rate from 35% to 21%, (ii) a $8,964 charge to record a valuation allowance against foreign tax credit carryforwards that as a result of the 2017 Tax Act are no longer expected to be realized, and (iii) a net charge of $3,130 related to other 2017 Tax Act items, which includes the transition tax on foreign earnings. In addition, the effective tax rate for fiscal 2017 was impacted by the following one-time discrete items (i) an $11,633 tax benefit related to the cessation of operations of the Company’s Spanish subsidiary, (ii) a $3,735 tax benefit due to a change in estimate related to the availability of certain foreign tax credits, and (iii) a The Company’s effective tax rate for the fiscal year ended December 31, 2016 was affected by a net tax benefit arising from a research and development tax credit and a Section 199 deduction for the tax years 2012 through 2016 and the reversal of a valuation allowance related to tax benefits for foreign losses that are now expected to be realized. These benefits were partially offset by income tax expenses recorded for out-of-period adjustments. December 29, December 30, December 31, 2018 2017 2016 U.S. federal statutory tax rate 21.0 % 35.0 % 35.0 % State income taxes (net of federal benefit) 1.1 % 2.5 % 2.0 % Cessation of operations (0.8 %) (8.0 %) 0.0 % Research and development credit (0.5 %) (1.3 %) (19.5 %) Tax windfall on share-based awards (8.6 %) (1.1 %) 0.0 % Reserves for uncertain tax positions (1.4 %) (0.2 %) 2.9 % Tax rate changes 0.3 % (49.6 %) 0.0 % (Decrease) increase in valuation adjustment related to foreign tax credits (3.5 %) 3.5 % (2.3 %) GILTI 1.5 % 0.0 % 0.0 % FDII (1.9 %) 0.0 % 0.0 % (Decrease) increase in valuation allowance due to net operating loss (0.7 %) 3.0 % 0.0 % Goodwill impairment 0.0 % 3.2 % 0.0 % Tax return adjustments related to 2017 Tax Act (1.1 %) 0.0 % 0.0 % Impact of foreign operations 3.2 % (0.7 %) 0.0 % Out-of-period adjustments 0.0 % 0.0 % 2.6 % Other (0.2 %) 1.1 % (0.9 %) Total effective tax rate 8.4 % (12.6 %) 19.8 % The deferred tax assets and liabilities recorded on the Company’s consolidated balance sheets are as follows: December 29, December 30, 2018 2017 Interest expense disallowance $ 22,418 $ 2,452 Operating loss carryforwards 9,862 17,424 Provision for estimated expenses 2,320 2,307 Depreciation 0 1,005 Salaries and wages 2,518 1,579 Share-based compensation 7,666 8,016 Foreign tax credit carryforwards 0 8,964 Other comprehensive income 5,877 4,797 Other 7,481 6,539 Less: valuation allowance (6,191 ) (22,760 ) Total deferred tax assets $ 51,951 $ 30,323 Goodwill and intangible assets $ (223,938 ) $ (166,257 ) Depreciation (1,149 ) 0 Other (886 ) (1,025 ) Total deferred tax liabilities $ (225,973 ) $ (167,282 ) Net deferred tax liabilities $ (174,022 ) $ (136,959 ) Certain foreign operations of the Company have generated net operating loss carryforwards. If it has been determined that it is more-likely-than-not that the deferred tax assets associated with these net operating loss carryforwards will not be utilized, a valuation allowance has been recorded. As of December 29, 2018 and December 30, 2017, various foreign subsidiaries had net operating loss carryforwards of approximately $38,098 and $69,359, respectively, some of which have an unlimited carryforward period, while others will begin to expire in fiscal 2019. As a result of the 2017 Tax Act changing the U.S. to a modified territorial tax system, the Company will no longer assert its $5,190 of undistributed foreign earnings as of December 29, 2018 are permanently reinvested. The Company has considered whether there would be any potential future costs of not asserting indefinite reinvestment and does not expect such costs to be significant. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: December 29, December 30, December 31, 2018 2017 2016 Balance at beginning of year $ 15,173 $ 10,297 $ 8,261 Increases related to tax positions taken in current year 60 266 1,291 Increases related to tax positions taken in prior years 1,207 7,246 5,508 Reductions related to tax positions taken in prior years (10,560 ) (1,268 ) (840 ) Reductions related to settlements with tax authorities (2,215 ) 0 (1,700 ) Reductions related to the expiration of statutes of limitations 0 (1,369 ) (2,223 ) Balance at end of year $ 3,665 $ 15,173 $ 10,297 The above reconciliation relating to prior years has been revised to reflect gross amounts. At December 29, 2018, the total amount of unrecognized tax benefits that, if recognized, would affect the Company’s effective tax rate is $2,319. Given the potential outcome of current examinations, it is reasonably possible that the balance of unrecognized tax benefits could significantly change within the next twelve months. However, an estimate of the range of reasonably possible adjustments cannot be made at this time. In 2018, the Company reached favorable settlements with the IRS for tax years 2012 and 2013, which resulted in a tax benefit of $1,890, and the Netherlands, which resulted in the release of a valuation allowance in the amount of $3,434. The Company files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. At December 29, 2018, with few exceptions, the Company was no longer subject to U.S. federal, state or local income tax examinations by tax authorities for years prior to 2016, or non-U.S. income tax examinations by tax authorities for years prior to 2014. The Company has no significant non-U.S. jurisdiction audits underway. The tax years 2013 through 2017 remain subject to examination by foreign tax authorities. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense. The Company had $186 and $515 of accrued interest and penalties at December 29, 2018 and December 30, 2017, respectively. The Company recognized $(65), $63 and $(777) in interest and penalties during the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 29, 2018
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	13. The Company sponsors the Third Amended and Restated Weight Watchers Savings Plan (the “Savings Plan”) for salaried and certain hourly US employees of the Company. The Savings Plan is a defined contribution plan that provides for employer matching contributions of 50% of the employee’s tax deferred contributions up to 6% of an employee’s eligible compensation for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016. During fiscal 2014, the Company received a favorable determination letter from the IRS that qualifies the Savings Plan under Section 401(a) of the Internal Revenue Code. Pursuant to the Savings Plan, the Company also makes profit sharing contributions for all full-time salaried US employees who are eligible to participate in the Savings Plan (except for certain personnel above a determined compensation level). The profit sharing contribution is a guaranteed monthly employer contribution on behalf of each participant based on the participant’s age and a percentage of the participant’s eligible compensation. The Savings Plan also has a discretionary supplemental profit sharing employer contribution component that is determined annually by the Compensation and Benefits Committee of the Company’s Board of Directors. Expense related to these contributions for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $1,317, $1,195 and $1,027, respectively. For certain US personnel above a determined compensation level, the Company sponsors the Second Amended and Restated Weight Watchers Executive Profit Sharing Plan (“EPSP”). Under the IRS definition, the EPSP is considered a Nonqualified Deferred Compensation Plan. There is a promise of payment by the Company made on the employees’ behalf instead of an individual account with a cash balance. The EPSP provides for a guaranteed employer contribution on behalf of each participant based on the participant’s age and a percentage of the participant’s eligible compensation. The EPSP has a discretionary supplemental employer contribution component that is determined annually by the Compensation and Benefits Committee of the Company’s Board of Directors. The EPSP is valued at the end of each fiscal month, based on an annualized interest rate of prime plus 2%, with an annualized cap of 15%. Expense related to this commitment for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $2,913, $2,382 and $1,915, respectively.

Cash Flow Information

Cash Flow Information	12 Months Ended
	Dec. 29, 2018
Supplemental Cash Flow Elements [Abstract]
Cash Flow Information	14. December 29, December 30, December 31, 2018 2017 2016 Net cash paid during the year for: Interest expense $ 119,866 $ 115,233 $ 112,942 Income taxes $ 12,095 $ 27,282 $ 25,516 Noncash investing and financing activities were as follows: Fair value of net assets acquired in connection with acquisitions $ 6,026 $ 0 $ 305 Change in Capital expenditures and Capitalized software included in accounts payable and accrued expenses $ (844 ) $ (3,450 ) $ 2,098

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 29, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. Litigation Matters Due to the nature of the Company’s activities, it is, at times, subject to pending and threatened legal 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. Commitments Minimum commitments under non-cancelable obligations, primarily for office and rental facilities operating leases at December 29, 2018, consist 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 under these operating leases for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $44,130, $42,259 and $40,927, respectively.

Segment and Geographic Data

Segment and Geographic Data	12 Months Ended
	Dec. 29, 2018
Segment Reporting [Abstract]
Segment and Geographic Data	16. 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 for the Year ended December 29, 2018 December 30, 2017 December 31, 2016 North America $ 1,047,251 $ 910,349 $ 798,827 Continental Europe 304,325 239,223 210,590 United Kingdom 107,072 99,989 100,808 Other 55,473 57,350 54,677 Total revenue, net $ 1,514,121 $ 1,306,911 $ 1,164,902 Net Income for the Year ended December 29, 2018 December 30, 2017 December 31, 2016 Segment operating income: North America $ 351,599 $ 247,587 $ 175,290 Continental Europe 114,708 73,689 51,096 United Kingdom 18,814 19,939 14,199 Other 9,604 (4,358 ) 8,813 Total segment operating income 494,725 336,857 249,398 General corporate expenses 105,740 69,552 48,587 Interest expense 142,346 112,784 115,160 Other expense, net 2,578 472 1,524 Early extinguishment of debt, net 0 8,969 0 Provision for (benefit from) income taxes 20,493 (18,237 ) 16,634 Net income $ 223,568 $ 163,317 $ 67,493 Net loss attributable to the noncontrolling interest 181 197 206 Net income attributable to Weight Watchers International, Inc. $ 223,749 $ 163,514 $ 67,699 Depreciation and Amortization for the Year ended December 29, 2018 December 30, 2017 December 31, 2016 North America $ 37,137 $ 39,501 $ 41,718 Continental Europe 1,347 1,203 1,621 United Kingdom 1,487 1,205 971 Other 597 626 815 Total segment depreciation and amortization 40,568 42,535 45,125 General corporate depreciation and amortization 12,032 14,457 13,624 Depreciation and amortization $ 52,600 $ 56,992 $ 58,749 The following tables present information about the Company’s sources of revenue and other information by geographic area. There were no material amounts of sales or transfers among geographic areas and no material amounts of US export sales. Total Revenue, net for the Year Ended December 29, 2018 December 30, 2017 December 31, 2016 Digital Subscription Revenues $ 567,767 $ 416,722 $ 343,789 Studio + Digital Fees 705,429 664,957 605,332 In-workshop product sales 148,856 137,855 125,508 Licensing, franchise royalties and other 92,069 87,377 90,273 $ 1,514,121 $ 1,306,911 $ 1,164,902 Total Revenue, net for the Year Ended December 29, 2018 December 30, 2017 December 31, 2016 United States $ 974,843 $ 846,249 $ 743,668 Canada 72,408 64,100 55,159 Continental Europe 304,325 239,223 210,590 United Kingdom 107,072 99,989 100,808 Other 55,473 57,350 54,677 $ 1,514,121 $ 1,306,911 $ 1,164,902 Long-Lived Assets December 29, 2018 December 30, 2017 December 31, 2016 United States $ 43,772 $ 42,114 $ 43,714 Canada 4,825 2,563 2,730 Continental Europe 1,257 642 716 United Kingdom 1,924 1,920 1,899 Other 424 739 515 $ 52,202 $ 47,978 $ 49,574

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 29, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	17. 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 an interest rate swap agreement as of December 29, 2018 and December 30, 2017. The fair value of the Company’s borrowings under the New Revolving Credit Facility approximated a carrying value of $0 and $25,000 at December 29, 2018 and December 30, 2017, respectively, due to the nature of the debt (Level 2 input). The fair value of the Company’s New Credit Facilities is determined by utilizing average bid prices on or near the end of each fiscal quarter (Level 2 input). As of December 29, 2018 and December 30, 2017, the fair value of the Company’s long-term debt was approximately $1,757,717 and $1,810,085, respectively, as compared to the carrying value (net of deferring financing costs and debt discount) of $1,746,708 and $1,798,362, 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 18 for disclosures related to derivative financial instruments. 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 December 29, 2018 $ 3,924 $ 0 $ 3,924 $ 0 Interest rate swap liability at December 29, 2018 $ 5,578 $ 0 $ 5,578 $ 0 Interest rate swap liability at December 30, 2017 $ 12,171 $ 0 $ 12,171 $ 0 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 fiscal years ended December 29, 2018 and December 30, 2017.

Derivative Instruments and Hedg

Derivative Instruments and Hedging	12 Months Ended
	Dec. 29, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging	18. As of December 29, 2018 and December 30, 2017, 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%. 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 December 29, 2018 and December 30, 2017, cumulative unrealized losses for qualifying hedges were reported as a component of accumulated other comprehensive loss in the amounts of $1,175 ($1,634 before taxes) and $5,392 ($8,839 before taxes), respectively. As of December 29, 2018, the fair value of the Company’s currently effective swap includes 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. As of December 30, 2017, the fair value of the Company’s currently effective swap was a liability of $12,171, which is included in derivative payable in the consolidated balance sheet. The Company is hedging forecasted transactions for periods not exceeding the next two years. The Company expects approximately $2,555 ($3,425

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 29, 2018
Equity [Abstract]
Accumulated Other Comprehensive Loss	19. Amounts reclassified out of accumulated other comprehensive loss are as follows: Changes in Accumulated Other Comprehensive Loss by Component (a) Fiscal Year Ended December 29, 2018 Loss 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 3,263 (8,556 ) (5,293 ) Amounts reclassified from accumulated other comprehensive loss, net of tax (b) 2,115 0 2,115 Adoption of accounting standard (1,161 ) (1,324 ) (2,485 ) Net current period other comprehensive income (loss) including noncontrolling interest 4,217 (9,880 ) (5,663 ) Less: net current period other comprehensive loss attributable to the noncontrolling interest 0 373 373 Ending Balance at December 29, 2018 $ (1,175 ) $ (14,582 ) $ (15,757 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Fiscal Year Ended December 30, 2017 Loss on Qualifying Hedges Loss on Foreign Currency Translation Total Beginning Balance at December 31, 2016 $ (16,002 ) $ (11,118 ) $ (27,120 ) Other comprehensive income before reclassifications, net of tax 883 5,221 6,104 Amounts reclassified from accumulated other comprehensive loss, net of tax (b) 9,727 787 10,514 Net current period other comprehensive income including noncontrolling interest 10,610 6,008 16,618 Less: net current period other comprehensive income attributable to the noncontrolling interest 0 35 35 Ending Balance at December 30, 2017 $ (5,392 ) $ (5,075 ) $ (10,467 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Fiscal Year Ended December 31, 2016 Loss on Qualifying Hedges Gain (loss) on Foreign Currency Translation Total Beginning Balance at January 2, 2016 $ (23,135 ) $ (14,130 ) $ (37,265 ) Other comprehensive (loss) income before reclassifications, net of tax (7,730 ) 3,467 (4,263 ) Amounts reclassified from accumulated other comprehensive loss, net of tax (b) 14,863 0 14,863 Net current period other comprehensive income including noncontrolling interest 7,133 3,467 10,600 Less: net current period other comprehensive income attributable to the noncontrolling interest 0 (455 ) (455 ) Ending Balance at December 31, 2016 $ (16,002 ) $ (11,118 ) $ (27,120 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Reclassifications out of Accumulated Other Comprehensive Loss (a) Fiscal Year Ended December 29, December 30, December 31, 2018 2017 2016 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 $ (2,835 ) $ (15,946 ) $ (24,366 ) Interest expense (2,835 ) (15,946 ) (24,366 ) Income before income taxes 720 6,219 9,503 Provision for (benefit from) income taxes $ (2,115 ) $ (9,727 ) $ (14,863 ) Net income Loss on Foreign Currency Translation $ 0 $ (787 ) $ 0 Other expense (income), net 0 (787 ) 0 Income before income taxes 0 0 0 Provision for (benefit from) income taxes $ 0 $ (787 ) $ 0 Net income (a) Amounts in parentheses indicate debits to profit / loss

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	12 Months Ended
	Dec. 29, 2018
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Pronouncements	20. In February 2016, 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. The modified retrospective transition approach requires application of the new guidance at the beginning of the earliest comparative period presented and the optional transition method permits an entity to apply the guidance at the adoption date. The updated guidance is effective for the Company beginning in the first quarter of fiscal 2019 and the Company will adopt the guidance as of the first day of the first quarter of fiscal 2019. While the Company is still evaluating the impact that the adoption of this guidance will have on the consolidated financial statements and related disclosures of the Company, the Company currently expects that most of its operating leases will be subject to the updated guidance and that this guidance will have a material impact of approximately $140,000 to $180,000 on its consolidated balance sheet due to the recognition of right of use assets and related obligations. The Company does not expect the adoption of the updated guidance to have a material effect on the consolidated statements of net income or the consolidated statements of cash flows.

Related Party

Related Party	12 Months Ended
	Dec. 29, 2018
Related Party Transactions [Abstract]
Related Party	21. 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 $2,208, $4,266 and $3,453 for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, respectively, which services included advertising, production and related fees. During fiscal 2017 and fiscal 2016, the Company also purchased $84 and $627 of books, respectively, authored by Ms. Winfrey, for resale. The Company’s accounts payable to parties related to Ms. Winfrey at December 29, 2018 and December 30, 2017 was $62 and $828, 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.

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (Unaudited)	22. The following is a summary of the unaudited quarterly consolidated results of operations for the fiscal years ended December 29, 2018 and December 30, 2017. For the Fiscal Quarters Ended March 31, June 30, September 29, December 29, 2018 2018 2018 2018 Fiscal year ended December 29, 2018 Revenues, net $ 408,223 $ 409,747 $ 365,765 $ 330,386 Gross profit $ 221,003 $ 244,794 $ 215,394 $ 185,220 Operating income $ 62,073 $ 127,708 $ 118,860 $ 80,347 Net income attributable to the Company $ 39,112 $ 70,720 $ 70,132 $ 43,785 Basic earnings per share $ 0.60 $ 1.07 $ 1.05 $ 0.65 Diluted earnings per share $ 0.56 $ 1.01 $ 1.00 $ 0.63 For the Fiscal Quarters Ended April 1, July 1, September 30, December 30, 2017 2017 2017 2017 Fiscal year ended December 30, 2017 Revenues, net $ 329,063 $ 341,673 $ 323,687 $ 312,488 Gross profit $ 164,097 $ 189,013 $ 177,088 $ 162,451 Operating income $ 30,233 $ 96,206 $ 91,378 $ 49,488 Net income attributable to the Company $ 10,653 $ 45,173 $ 44,719 $ 62,969 Basic earnings per share $ 0.17 $ 0.70 $ 0.69 $ 0.97 Diluted earnings per share $ 0.16 $ 0.67 $ 0.65 $ 0.91 Basic and diluted EPS are computed independently for each of the periods presented. Accordingly, the sum of the quarterly EPS amounts may not agree to the total for the year. As discussed in Note 2, the Company recorded an impairment charge for goodwill related to its Brazil reporting unit of $13,323, or $0.19 per fully diluted share, in the fourth quarter of fiscal 2017. As discussed in Note 8, the Company recorded a write-off of deferred financing costs in connection with the November 2017 debt refinancing of $10,524 ($0.09 per fully diluted share) in the fourth quarter of fiscal 2017. As discussed in further detail in Note 12, the Company recorded a net tax benefit of $ 56,560

VALUATION AND QUALIFYING ACCOUN

VALUATION AND QUALIFYING ACCOUNTS AND RESERVES	12 Months Ended
	Dec. 29, 2018
Valuation And Qualifying Accounts [Abstract]
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES	(IN THOUSANDS) Additions Balance at Charged to Charged Balance at Beginning Costs and to Other End of Period Expenses Accounts Deductions (1) of Period FISCAL YEAR ENDED DECEMBER 29, 2018 Allowance for doubtful accounts $ 2,001 $ 130 $ 0 $ (388 ) $ 1,743 Inventory and other reserves $ 3,984 $ 7,906 $ 0 $ (8,047 ) $ 3,843 Tax valuation allowance $ 22,760 $ 1,893 $ (403 ) $ (18,059 ) $ 6,191 FISCAL YEAR ENDED DECEMBER 30, 2017 Allowance for doubtful accounts $ 2,973 $ (587 ) $ 0 $ (385 ) $ 2,001 Inventory and other reserves $ 3,703 $ 7,823 $ 0 $ (7,542 ) $ 3,984 Tax valuation allowance $ 18,277 $ 11,515 $ 1,079 $ (8,111 ) $ 22,760 FISCAL YEAR ENDED DECEMBER 31, 2016 Allowance for doubtful accounts $ 2,226 $ 363 $ 384 $ 0 $ 2,973 Inventory and other reserves $ 4,065 $ 5,109 $ 0 $ (5,471 ) $ 3,703 Tax valuation allowance $ 28,280 $ 2,258 $ (483 ) $ (11,778 ) $ 18,277 (1) Primarily represents the utilization of established reserves, net of recoveries, where applicable.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 29, 2018
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year: The Company’s fiscal year ends on the Saturday closest to December 31 st
Use of Estimates	Use of Estimates: The preparation of financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates and judgments, including those related to inventories, the impairment analysis for goodwill and other indefinite-lived intangible assets, share-based compensation, income taxes, tax contingencies and litigation. The Company bases its estimates on historical experience and on various other factors and assumptions that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual amounts could differ from these estimates.
Translation of Foreign Currencies	Translation of Foreign Currencies: For all foreign operations, the functional currency is the local currency. Assets and liabilities of these operations are translated into US dollars using the exchange rate in effect at the end of each reporting period. Income statement accounts are translated at the average rate of exchange prevailing during each reporting period. Translation adjustments arising from the use of differing exchange rates from period to period are included in accumulated other comprehensive loss. Foreign currency gains and losses arising from the translation of intercompany receivables and intercompany payables with the Company’s international subsidiaries are recorded as a component of other expense, net, unless the receivable or payable is considered long-term in nature, in which case the foreign currency gains and losses are recorded as a component of accumulated other comprehensive loss.
Cash Equivalents	Cash Equivalents: Cash and cash equivalents are defined as highly liquid investments with original maturities of three months or less. Cash balances may, at times, exceed insurable amounts. The Company believes it mitigates this risk by investing in or through major financial institutions. Cash includes balances due from third-party credit card companies.
Inventories	Inventories: Inventories, which consist of finished goods, are stated at the lower of cost or net realizable value on a first-in, first-out basis, net of reserves for obsolescence and shrinkage.
Property and Equipment	Property and Equipment: Property and equipment are recorded at cost. For financial reporting purposes, equipment is depreciated on the straight-line method over the estimated useful lives of the assets (3 to 10 years). Leasehold improvements are amortized on the straight-line method over the shorter of the term of the lease or the useful life of the related assets. Expenditures for new facilities and improvements that substantially extend the useful life of an asset are capitalized. Ordinary repairs and maintenance are expensed as incurred. When assets are retired or otherwise disposed of, the cost and related depreciation are removed from the accounts and any related gains or losses are included in income.
Impairment of Long Lived Assets	Impairment of Long Lived Assets: The Company reviews long-lived assets, including amortizable intangible assets, for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. In fiscal 2018, fiscal 2017 and fiscal 2016, the Company recorded impairment charges of $0, $674 and $484, respectively, related to internal-use computer software that was not expected to provide substantive service potential. In fiscal 2018, fiscal 2017 and fiscal 2016, the Company recorded impairment charges of $27, $8 and $131, respectively, related to property, plant and equipment that were expected to be disposed of before the end of their estimated useful lives.
Goodwill and Franchise Rights Acquired	Goodwill and Franchise Rights Acquired: The Company reviews goodwill and other indefinite-lived intangible assets, including franchise rights acquired with indefinite lives, for potential impairment on at least an annual basis or more often if events so require. The Company performed fair value impairment testing as of May 6, 2018 and May 7, 2017, each the first day of fiscal May, on its goodwill and other indefinite-lived intangible assets. In addition, for the Company’s Brazil reporting unit only, given the ongoing challenging economic environment, the negative performance trends and the Company’s reduced expectations regarding the future impact of its business growth strategies in the country, the Company performed an interim goodwill impairment analysis at December 30, 2017. In performing the interim goodwill impairment analysis for its Brazil reporting unit, the Company recorded a $13,323 impairment charge at December 30, 2017. In performing its annual impairment analysis as of May 6, 2018 and May 7, 2017, the Company determined that the carrying amounts of its goodwill reporting units and franchise rights acquired with indefinite lives units of account did not exceed their respective fair values and therefore, no impairment existed. For all reporting units, except for Brazil, there was significant headroom in the impairment analysis. Based on the results of the Company’s annual impairment test performed for all of its reporting units except for Brazil, as of the December 29, 2018 balance sheet date, the Company estimated that for reporting units that hold approximately 97.0% of the Company’s goodwill, those units had a fair value at least 50 impairment test performed for its Brazil reporting unit is When determining fair value, the Company utilizes various assumptions, including projections of future cash flows, growth rates and discount rates. A change in these underlying assumptions would cause a change in the results of the tests and, as such, could cause fair value to be less than the carrying amounts and result in an impairment of those assets. In the event such a result occurred, the Company would be required to record a corresponding charge, which would impact earnings. The Company would also be required to reduce the carrying amounts of the related assets on its balance sheet. The Company continues to evaluate these assumptions and believes that these assumptions are appropriate. The following is a discussion of the goodwill and franchise rights acquired impairment analysis. Goodwill In performing the impairment analysis for goodwill, the fair value for the Company’s reporting units is estimated using a discounted cash flow approach. This approach involves projecting future cash flows attributable to the reporting unit and discounting those estimated cash flows using an appropriate discount rate. The estimated fair value is then compared to the carrying value of the reporting units. The Company has determined the appropriate reporting unit for purposes of assessing annual impairment to be the country for all reporting units. For all of the Company’s reporting units except for Brazil (see below), the Company estimated future cash flows by utilizing the historical debt-free cash flows (cash flows provided by operating activities less capital expenditures) attributable to that country and then applied expected future operating income growth rates for such country. The Company utilized operating income as the basis for measuring its potential growth because it believes it is the best indicator of the performance of its business. The Company then discounted the estimated future cash flows utilizing a discount rate which was calculated using the average cost of capital, which included the cost of equity and the cost of debt. The cost of equity was determined by combining a risk-free rate of return and a market risk premium for the Company’s peer group. The risk-free rate of return was determined based on the average rate of long-term U.S. Treasury securities. The market risk premium was determined by reviewing external market data. The cost of debt was determined by estimating the Company’s current borrowing rate. As it relates to the impairment analysis for Brazil, the Company estimated future debt free cash flows in contemplation of its growth strategies for that market. In developing these projections, the Company considered the historical impact of similar growth strategies in other markets as well as the current market conditions in Brazil. The Company then discounted the estimated future cash flows utilizing a discount rate which was calculated using the average cost of capital, which included the cost of equity and the cost of debt. The cost of equity was determined by combining a risk-free rate of return and a market risk premium for the Company’s peer group. The risk-free rate of return was determined based on the average rate of long-term U.S. Treasury securities. The market risk premium was determined by reviewing external market data including the current economic conditions in Brazil and the country specific risk thereon. A further risk premium was included to reflect the risk associated with the significantly higher growth rates projected in the May 7, 2017 annual impairment test. The cost of debt was determined by estimating the Company’s current borrowing rate. The book values of goodwill in the United States, Canada, Brazil and other countries at December 29, 2018 were $98,857, $39,300, $4,584 and $9,778, respectively, totaling $152,519 and the values at December 30, 2017 were $97,755, $42,634, $5,372 and $10,520, respectively, totaling $156,281. Franchise Rights Acquired Finite-lived franchise rights acquired are amortized over the remaining contractual period, which is generally less than one year. Indefinite-lived franchise rights acquired are tested on an annual basis for impairment. In performing the impairment analysis for indefinite-lived franchise rights acquired, the fair value for franchise rights acquired is estimated using a discounted cash flow approach referred to as the hypothetical start-up approach for franchise rights related to the Company’s Studio + Digital business and a relief from royalty methodology for franchise rights related to the Company’s Digital business. The aggregate estimated fair value for these rights is then compared to the carrying value of the unit of account for those franchise rights. The Company has determined the appropriate unit of account for purposes of assessing impairment to be the combination of the rights in both the Studio + Digital business and the Digital business in the country in which the acquisitions have occurred. The book values of these franchise rights in the United States, Canada, United Kingdom, Australia, and New Zealand at December 29, 2018 were $671,914, $52,919, $11,441, $6,327 and $4,747, respectively, totaling $747,348 and the values at December 30, 2017 were $671,914, $57,408, $12,680, $7,018 and $5,020, respectively, totaling $754,040. In its hypothetical start-up approach analysis for fiscal 2018, the Company assumed that the year of maturity was reached after 7 years. Subsequent to the year of maturity, the Company estimated future cash flows for the Studio + Digital business in each country based on assumptions regarding revenue growth and operating income margins. The cash flows associated with the Digital business were based on the expected Digital revenue for such country and the application of a market-based royalty rate. The cash flows for the Studio + Digital and Digital businesses were discounted utilizing rates consistent with those utilized in the goodwill impairment analysis.
Other Intangible Assets	Other Intangible Assets: Other finite-lived intangible assets are amortized using the straight-line method over their estimated useful lives of 3 to 20 years. The Company expenses all software costs (including website development costs) incurred during the preliminary project stage and capitalizes all internal and external direct costs of materials and services consumed in developing software (including website development costs) once the development has reached the application development stage. Application development stage costs generally include software configuration, coding, installation to hardware and testing. These costs are amortized over their estimated useful life of 3 years for website development costs and from 3 to 5 years for all other software costs. All costs incurred for upgrades, maintenance and enhancements, including the cost of website content, which do not result in additional functionality, are expensed as incurred.
Revenue Recognition	Revenue Recognition: WW earns revenue from subscriptions for the Company’s 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. WW 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 is 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, WW 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.
Advertising Costs	Advertising Costs: Advertising costs consist primarily of broadcast and digital media. All costs related to advertising are expensed in the period incurred, except for media production-related costs, which are expensed the first time the advertising takes place. Total advertising expenses for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016, were $218,062, $193,423 and $186,614, respectively.
Income Taxes	Income Taxes: Deferred income tax assets and liabilities result primarily from temporary differences between the financial statement and tax bases of assets and liabilities, using enacted tax rates in effect for the year in which differences are expected to reverse. If it is more-likely-than-not that some portion of a deferred tax asset will not be realized, a valuation allowance is recognized. The Company considers historic levels of income, estimates of future taxable income and feasible tax planning strategies in assessing the need for a tax valuation allowance. The Company recognizes a benefit for uncertain tax positions when a tax position taken or expected to be taken in a tax return is more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The Company recognizes accrued interest and penalties associated with uncertain tax positions as part of the provision for income taxes on its consolidated statements of net income. In addition, assets and liabilities acquired in purchase business combinations are assigned their fair values and deferred taxes are provided for lower or higher tax bases.
Derivative Instruments and Hedging	Derivative Instruments and Hedging: The Company is exposed to certain risks related to its ongoing business operations, primarily interest rate risk and foreign currency risk. An interest rate swap was entered into to hedge a portion of the cash flow exposure associated with the Company’s variable-rate borrowings. The Company does not use any derivative instruments for trading or speculative purposes. The Company recognizes the fair value of all derivative instruments as either assets or liabilities on the balance sheet. The Company has designated and accounted for the interest rate swap as cash flow hedges of its variable-rate borrowings. For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of accumulated other comprehensive loss and reclassified into earnings in the periods during which the hedged transactions affect earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. The fair value of the Company’s interest rate swap is reported as a component of accumulated other comprehensive loss on its balance sheet. See Note 17 for a further discussion regarding the fair value of the Company’s interest rate swap. The net effect of the interest payable and receivable under the Company’s interest rate swap is included in interest expense on the consolidated statements of net income.
Deferred Financing Costs	Deferred Financing Costs: Deferred financing costs consist of fees paid by the Company as part of the establishment, exchange and/or modification of the Company’s long-term debt. During the fourth quarter of fiscal 2017, the Company incurred fees of $53,832 (which includes $30,800 of a debt discount) in connection with the November 2017 debt refinancing (as described in Note 8). In addition, the Company recorded a loss on extinguishment of debt of $10,524 in connection thereto. This early extinguishment of debt write-off was comprised of $5,716 of deferred financing fees paid in connection with the November 2017 debt refinancing and $4,808 of pre-existing deferred financing fees. During the fiscal year ended December 30, 2017 in connection with the prepayment of debt, the Company wrote-off deferred financing fees of $618, incurred fees of $305 and recorded a gain on early extinguishment of debt of $1,554, inclusive of these fees. Amortization expense for the fiscal years ended December 29, 2018, December 30, 2017 and December 31, 2016 was $8,539, $6,112 and $6,116, respectively.
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss: The Company’s accumulated other comprehensive loss includes changes in the fair value of derivative instruments and the effects of foreign currency translations. At December 29, 2018, December 30, 2017 and December 31, 2016, the cumulative balance of changes in fair value of derivative instruments, net of taxes, was $1,175, $5,392 and $16,002, respectively. At December 29, 2018, December 30, 2017 and December 31, 2016, the cumulative balance of the effects of foreign currency translations, net of taxes, was $14,582, $5,075 and $11,118, respectively.

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 29, 2018
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: Fiscal Year Ended December 29, December 30, December 31, 2018 2017 2016 Digital Subscription Revenues $ 567,767 $ 416,722 $ 343,789 Studio + Digital Fees 705,429 664,957 605,332 Service revenues, net $ 1,273,196 $ 1,081,679 $ 949,121 Product sales and other, net 240,925 225,232 215,781 Revenues, net $ 1,514,121 $ 1,306,911 $ 1,164,902
Schedule of Revenues Disaggregated by Segment	The following tables present the Company’s revenues disaggregated by segment: Fiscal Year Ended December 29, 2018 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 378,678 $ 149,571 $ 25,557 $ 13,961 $ 567,767 Studio + Digital Fees 522,372 107,528 52,676 22,853 705,429 Service revenues, net $ 901,050 $ 257,099 $ 78,233 $ 36,814 $ 1,273,196 Product sales and other, net 146,201 47,226 28,839 18,659 240,925 Revenues, net $ 1,047,251 $ 304,325 $ 107,072 $ 55,473 $ 1,514,121 Fiscal Year Ended December 30, 2017 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 281,432 $ 102,039 $ 21,477 $ 11,774 $ 416,722 Studio + Digital Fees 493,800 93,723 52,161 25,273 664,957 Service revenues, net $ 775,232 $ 195,762 $ 73,638 $ 37,047 $ 1,081,679 Product sales and other, net 135,117 43,461 26,351 20,303 225,232 Revenues, net $ 910,349 $ 239,223 $ 99,989 $ 57,350 $ 1,306,911 Fiscal Year Ended December 31, 2016 North Continental United America Europe Kingdom Other Total Digital Subscription Revenues $ 239,145 $ 75,014 $ 18,780 $ 10,850 $ 343,789 Studio + Digital Fees 437,239 89,646 54,473 23,974 605,332 Service revenues, net $ 676,384 $ 164,660 $ 73,253 $ 34,824 $ 949,121 Product sales and other, net 122,443 45,930 27,555 19,853 215,781 Revenues, net $ 798,827 $ 210,590 $ 100,808 $ 54,677 $ 1,164,902
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 30, 2017 $ 74,332 $ 2,049 Adoption of accounting standard (3,501 ) 0 Net decrease during the period (17,330 ) (1,088 ) Balance as of December 29, 2018 $ 53,501 $ 961

Franchise Rights Acquired, Go_2

Franchise Rights Acquired, Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 29, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Values of Goodwill	For the fiscal year ended December 29, 2018, the change in the carrying amount of goodwill is due to the Kurbo acquisition, a franchise acquisition and the effect of exchange rate changes as follows: North Continental United America Europe Kingdom Other Total Balance as of December 30, 2017 $ 140,389 $ 7,759 $ 1,253 $ 6,880 $ 156,281 Goodwill acquired during the period 1,101 0 0 0 1,101 Effect of exchange rate changes (3,334 ) (517 ) (75 ) (937 ) (4,863 ) Balance as of December 29, 2018 $ 138,156 $ 7,242 $ 1,178 $ 5,943 $ 152,519
Schedule of Finite-Lived Intangible Assets by Major Class	The below table reflects the carrying values of finite-lived intangible assets as of December 29, 2018 and December 30, 2017: December 29, 2018 December 30, 2017 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Amount Amortization Capitalized software costs $ 121,508 $ 102,659 $ 111,617 $ 94,697 Website development costs 105,710 77,825 90,096 61,125 Trademarks 11,620 11,010 11,231 10,833 Other 13,967 4,149 3,793 3,546 Trademarks and other intangible assets $ 252,805 $ 195,643 $ 216,737 $ 170,201 Franchise rights acquired 8,110 4,319 4,526 4,526 Total finite-lived intangible assets $ 260,915 $ 199,962 $ 221,263 $ 174,727
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: Fiscal 2019 $ 23,689 Fiscal 2020 $ 16,232 Fiscal 2021 $ 7,971 Fiscal 2022 $ 1,641 Fiscal 2023 and thereafter $ 11,420

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 29, 2018
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	The below table reflects the carrying values of property and equipment as of December 29, 2018 and December 30, 2017: December 29, December 30, 2018 2017 Equipment $ 75,531 $ 70,126 Leasehold improvements 80,002 71,469 155,533 141,595 Less: Accumulated depreciation and amortization (103,331 ) (93,617 ) $ 52,202 $ 47,978

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 29, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The components of the Company’s long-term debt were as follows: December 29, 2018 December 30, 2017 Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) Principal Balance Unamortized Deferred Financing Costs Unamortized Debt Discount Effective Rate (1) New Revolving Credit Facility due November 29, 2022 $ 0 $ 0 $ 0 4.39 % $ 25,000 $ 0 $ 0 4.15 % Former Tranche B-2 Term Facility due April 2, 2020 0 0 0 0.00 % 0 0 0 4.76 % New Term Loan Facility due November 29, 2024 1,482,250 8,307 26,033 7.53 % 1,540,000 9,783 30,433 6.84 % Notes due December 1, 2025 300,000 1,202 0 8.69 % 300,000 1,422 0 8.82 % Total $ 1,782,250 $ 9,509 $ 26,033 7.63 % $ 1,865,000 $ 11,205 $ 30,433 4.96 % Less: Current Portion 77,000 82,750 Unamortized Deferred Financing Costs 9,509 11,205 Unamortized Debt Discount 26,033 30,433 Total Long-Term Debt $ 1,669,708 $ 1,740,612
Schedule of Maturities of Long-term Debt	At December 29, 2018, the aggregate amounts of the Company’s existing long-term debt maturing in each of the next five fiscal years and thereafter were as follows: 2019 $ 77,000 2020 96,250 2021 77,000 2022 77,000 2023 77,000 2024 and thereafter 1,378,000 $ 1,782,250

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 29, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted EPS for the fiscal years ended: December 29, December 30, December 31, 2018 2017 2016 Numerator: Net income attributable to Weight Watchers International, Inc. $ 223,749 $ 163,514 $ 67,699 Denominator: Weighted average shares of common stock outstanding 66,280 64,329 63,742 Effect of dilutive common stock equivalents 3,835 3,919 2,155 Weighted average diluted common shares outstanding 70,115 68,248 65,897 Earnings per share attributable to Weight Watchers International, Inc. Basic $ 3.38 $ 2.54 $ 1.06 Diluted $ 3.19 $ 2.40 $ 1.03

Stock Plans (Tables)

Stock Plans (Tables)	12 Months Ended
	Dec. 29, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair value of each of these option awards is estimated on the date of grant using the Black-Scholes option pricing model with the weighted average assumptions noted in the following table. Expected volatility is based on the historical volatility of the Company’s common stock. Since the Company’s option exercise history is limited, it has estimated the expected term of these options (other than the options with a seven-year term) to be the midpoint between the vesting period and the contractual term of each option. For options with a seven-year contractual term, the expected term is equal to 7 years. The risk-free interest rate is based on the U.S. Treasury yield curve in effect on the date of grant which most closely corresponds to the expected term of the Time-Vesting Options. The dividend yield is based on the Company’s historic average dividend yield. December 30, December 31, 2017 2016 Dividend yield 0.0% 0.0% Volatility 51.3%-51.7% 49.6%-51.4% Risk-free interest rate 2.17% 1.24%-2.26% Expected term (years) 6.0-7.0 6.0
Summary of Option Activity Under Stock Plans, Inducement Option and Winfrey Option	A summary of all option activity under the Stock Plans and with respect to the Inducement Option and the previously disclosed Winfrey Option for the fiscal year ended December 29, 2018 is presented below: Weighted- Weighted- Average Average Remaining Aggregate Exercise Contractual Intrinsic Shares Price Life (Yrs.) Value Outstanding at December 30, 2017 5,884 $ 18.17 Granted 0 $ 0.00 Exercised (2,037 ) $ 11.89 Cancelled (58 ) $ 9.21 Outstanding at December 29, 2018 3,789 $ 21.69 6.2 $ 84,871 Exercisable at December 29, 2018 2,790 $ 13.27 6.5 $ 81,774
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	A summary of RSU activity under the Stock Plans for the fiscal year ended December 29, 2018 is presented below: Weighted-Average Grant-Date Fair Shares Value Outstanding at December 30, 2017 1,077 $ 24.22 Granted 274 $ 63.91 Vested (379 ) $ 22.38 Forfeited (91 ) $ 21.07 Outstanding at December 29, 2018 881 $ 37.91
Schedule of Share-based Compensation, Performance Stock Units Award Activity	The fair value of PSUs is determined using the closing market price of the Company’s common stock on the date of grant. A summary of PSU activity under the 2014 Plan for the fiscal year ended December 29, 2018 is presented below: Weighted-Average Grant-Date Fair Shares Value Outstanding at December 30, 2017 330 $ 19.42 Granted 81 $ 80.18 Vested 0 $ 0 Forfeited (31 ) $ 17.73 Outstanding at December 29, 2018 380 $ 32.56

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The following tables summarize the Company’s consolidated provision for U.S. federal, state and foreign taxes on income: December 29, December 30, December 31, 2018 2017 2016 Current: U.S. federal $ 1,235 $ 9,224 $ (15,254 ) State 5,918 1,993 604 Foreign 27,013 18,762 20,191 $ 34,166 $ 29,979 $ 5,541 Deferred: U.S. federal $ (10,367 ) $ (51,788 ) $ 10,980 State (2,566 ) 481 1,877 Foreign (740 ) 3,091 (1,764 ) $ (13,673 ) $ (48,216 ) $ 11,093 Total tax provision (benefit) $ 20,493 $ (18,237 ) $ 16,634
Schedule of Income before Income Tax, Domestic and Foreign	The components of the Company’s consolidated income before income taxes consist of the following: December 29, December 30, December 31, 2018 2017 2016 Domestic $ 126,171 $ 53,045 $ 26,367 Foreign 117,890 92,035 57,760 $ 244,061 $ 145,080 $ 84,127
Summary of Differences Between U.S. Federal Statutory Tax Rate and Company's Consolidated Effective Tax Rate	The difference between the U.S. federal statutory tax rate and the Company’s consolidated effective tax rate is as follows: December 29, December 30, December 31, 2018 2017 2016 U.S. federal statutory tax rate 21.0 % 35.0 % 35.0 % State income taxes (net of federal benefit) 1.1 % 2.5 % 2.0 % Cessation of operations (0.8 %) (8.0 %) 0.0 % Research and development credit (0.5 %) (1.3 %) (19.5 %) Tax windfall on share-based awards (8.6 %) (1.1 %) 0.0 % Reserves for uncertain tax positions (1.4 %) (0.2 %) 2.9 % Tax rate changes 0.3 % (49.6 %) 0.0 % (Decrease) increase in valuation adjustment related to foreign tax credits (3.5 %) 3.5 % (2.3 %) GILTI 1.5 % 0.0 % 0.0 % FDII (1.9 %) 0.0 % 0.0 % (Decrease) increase in valuation allowance due to net operating loss (0.7 %) 3.0 % 0.0 % Goodwill impairment 0.0 % 3.2 % 0.0 % Tax return adjustments related to 2017 Tax Act (1.1 %) 0.0 % 0.0 % Impact of foreign operations 3.2 % (0.7 %) 0.0 % Out-of-period adjustments 0.0 % 0.0 % 2.6 % Other (0.2 %) 1.1 % (0.9 %) Total effective tax rate 8.4 % (12.6 %) 19.8 %
Schedule of Deferred Tax Assets and Liabilities	The deferred tax assets and liabilities recorded on the Company’s consolidated balance sheets are as follows: December 29, December 30, 2018 2017 Interest expense disallowance $ 22,418 $ 2,452 Operating loss carryforwards 9,862 17,424 Provision for estimated expenses 2,320 2,307 Depreciation 0 1,005 Salaries and wages 2,518 1,579 Share-based compensation 7,666 8,016 Foreign tax credit carryforwards 0 8,964 Other comprehensive income 5,877 4,797 Other 7,481 6,539 Less: valuation allowance (6,191 ) (22,760 ) Total deferred tax assets $ 51,951 $ 30,323 Goodwill and intangible assets $ (223,938 ) $ (166,257 ) Depreciation (1,149 ) 0 Other (886 ) (1,025 ) Total deferred tax liabilities $ (225,973 ) $ (167,282 ) Net deferred tax liabilities $ (174,022 ) $ (136,959 )
Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: December 29, December 30, December 31, 2018 2017 2016 Balance at beginning of year $ 15,173 $ 10,297 $ 8,261 Increases related to tax positions taken in current year 60 266 1,291 Increases related to tax positions taken in prior years 1,207 7,246 5,508 Reductions related to tax positions taken in prior years (10,560 ) (1,268 ) (840 ) Reductions related to settlements with tax authorities (2,215 ) 0 (1,700 ) Reductions related to the expiration of statutes of limitations 0 (1,369 ) (2,223 ) Balance at end of year $ 3,665 $ 15,173 $ 10,297

Cash Flow Information (Tables)

Cash Flow Information (Tables)	12 Months Ended
	Dec. 29, 2018
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	December 29, December 30, December 31, 2018 2017 2016 Net cash paid during the year for: Interest expense $ 119,866 $ 115,233 $ 112,942 Income taxes $ 12,095 $ 27,282 $ 25,516 Noncash investing and financing activities were as follows: Fair value of net assets acquired in connection with acquisitions $ 6,026 $ 0 $ 305 Change in Capital expenditures and Capitalized software included in accounts payable and accrued expenses $ (844 ) $ (3,450 ) $ 2,098

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 29, 2018
Commitments And Contingencies Disclosure [Abstract]
Minimum Commitments Under Non-Cancelable Obligations	Minimum commitments under non-cancelable obligations, primarily for office and rental facilities operating leases at December 29, 2018, consist 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

Segment and Geographic Data (Ta

Segment and Geographic Data (Tables)	12 Months Ended
	Dec. 29, 2018
Segment Reporting [Abstract]
Information About Reportable Segments	Information about the Company’s reportable segments is as follows: Total Revenue, net for the Year ended December 29, 2018 December 30, 2017 December 31, 2016 North America $ 1,047,251 $ 910,349 $ 798,827 Continental Europe 304,325 239,223 210,590 United Kingdom 107,072 99,989 100,808 Other 55,473 57,350 54,677 Total revenue, net $ 1,514,121 $ 1,306,911 $ 1,164,902 Net Income for the Year ended December 29, 2018 December 30, 2017 December 31, 2016 Segment operating income: North America $ 351,599 $ 247,587 $ 175,290 Continental Europe 114,708 73,689 51,096 United Kingdom 18,814 19,939 14,199 Other 9,604 (4,358 ) 8,813 Total segment operating income 494,725 336,857 249,398 General corporate expenses 105,740 69,552 48,587 Interest expense 142,346 112,784 115,160 Other expense, net 2,578 472 1,524 Early extinguishment of debt, net 0 8,969 0 Provision for (benefit from) income taxes 20,493 (18,237 ) 16,634 Net income $ 223,568 $ 163,317 $ 67,493 Net loss attributable to the noncontrolling interest 181 197 206 Net income attributable to Weight Watchers International, Inc. $ 223,749 $ 163,514 $ 67,699 Depreciation and Amortization for the Year ended December 29, 2018 December 30, 2017 December 31, 2016 North America $ 37,137 $ 39,501 $ 41,718 Continental Europe 1,347 1,203 1,621 United Kingdom 1,487 1,205 971 Other 597 626 815 Total segment depreciation and amortization 40,568 42,535 45,125 General corporate depreciation and amortization 12,032 14,457 13,624 Depreciation and amortization $ 52,600 $ 56,992 $ 58,749
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	The following tables present information about the Company’s sources of revenue and other information by geographic area. There were no material amounts of sales or transfers among geographic areas and no material amounts of US export sales. Total Revenue, net for the Year Ended December 29, 2018 December 30, 2017 December 31, 2016 Digital Subscription Revenues $ 567,767 $ 416,722 $ 343,789 Studio + Digital Fees 705,429 664,957 605,332 In-workshop product sales 148,856 137,855 125,508 Licensing, franchise royalties and other 92,069 87,377 90,273 $ 1,514,121 $ 1,306,911 $ 1,164,902 Total Revenue, net for the Year Ended December 29, 2018 December 30, 2017 December 31, 2016 United States $ 974,843 $ 846,249 $ 743,668 Canada 72,408 64,100 55,159 Continental Europe 304,325 239,223 210,590 United Kingdom 107,072 99,989 100,808 Other 55,473 57,350 54,677 $ 1,514,121 $ 1,306,911 $ 1,164,902 Long-Lived Assets December 29, 2018 December 30, 2017 December 31, 2016 United States $ 43,772 $ 42,114 $ 43,714 Canada 4,825 2,563 2,730 Continental Europe 1,257 642 716 United Kingdom 1,924 1,920 1,899 Other 424 739 515 $ 52,202 $ 47,978 $ 49,574

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 29, 2018
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 December 29, 2018 $ 3,924 $ 0 $ 3,924 $ 0 Interest rate swap liability at December 29, 2018 $ 5,578 $ 0 $ 5,578 $ 0 Interest rate swap liability at December 30, 2017 $ 12,171 $ 0 $ 12,171 $ 0

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 29, 2018
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) Fiscal Year Ended December 29, 2018 Loss 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 3,263 (8,556 ) (5,293 ) Amounts reclassified from accumulated other comprehensive loss, net of tax (b) 2,115 0 2,115 Adoption of accounting standard (1,161 ) (1,324 ) (2,485 ) Net current period other comprehensive income (loss) including noncontrolling interest 4,217 (9,880 ) (5,663 ) Less: net current period other comprehensive loss attributable to the noncontrolling interest 0 373 373 Ending Balance at December 29, 2018 $ (1,175 ) $ (14,582 ) $ (15,757 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Fiscal Year Ended December 30, 2017 Loss on Qualifying Hedges Loss on Foreign Currency Translation Total Beginning Balance at December 31, 2016 $ (16,002 ) $ (11,118 ) $ (27,120 ) Other comprehensive income before reclassifications, net of tax 883 5,221 6,104 Amounts reclassified from accumulated other comprehensive loss, net of tax (b) 9,727 787 10,514 Net current period other comprehensive income including noncontrolling interest 10,610 6,008 16,618 Less: net current period other comprehensive income attributable to the noncontrolling interest 0 35 35 Ending Balance at December 30, 2017 $ (5,392 ) $ (5,075 ) $ (10,467 ) (a) Amounts in parentheses indicate debits (b) See separate table below for details about these reclassifications Fiscal Year Ended December 31, 2016 Loss on Qualifying Hedges Gain (loss) on Foreign Currency Translation Total Beginning Balance at January 2, 2016 $ (23,135 ) $ (14,130 ) $ (37,265 ) Other comprehensive (loss) income before reclassifications, net of tax (7,730 ) 3,467 (4,263 ) Amounts reclassified from accumulated other comprehensive loss, net of tax (b) 14,863 0 14,863 Net current period other comprehensive income including noncontrolling interest 7,133 3,467 10,600 Less: net current period other comprehensive income attributable to the noncontrolling interest 0 (455 ) (455 ) Ending Balance at December 31, 2016 $ (16,002 ) $ (11,118 ) $ (27,120 ) (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) Fiscal Year Ended December 29, December 30, December 31, 2018 2017 2016 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 $ (2,835 ) $ (15,946 ) $ (24,366 ) Interest expense (2,835 ) (15,946 ) (24,366 ) Income before income taxes 720 6,219 9,503 Provision for (benefit from) income taxes $ (2,115 ) $ (9,727 ) $ (14,863 ) Net income Loss on Foreign Currency Translation $ 0 $ (787 ) $ 0 Other expense (income), net 0 (787 ) 0 Income before income taxes 0 0 0 Provision for (benefit from) income taxes $ 0 $ (787 ) $ 0 Net income (a) Amounts in parentheses indicate debits to profit / loss

Quarterly Financial Informati_2

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Unaudited Quarterly Consolidated Results of Operations	The following is a summary of the unaudited quarterly consolidated results of operations for the fiscal years ended December 29, 2018 and December 30, 2017. For the Fiscal Quarters Ended March 31, June 30, September 29, December 29, 2018 2018 2018 2018 Fiscal year ended December 29, 2018 Revenues, net $ 408,223 $ 409,747 $ 365,765 $ 330,386 Gross profit $ 221,003 $ 244,794 $ 215,394 $ 185,220 Operating income $ 62,073 $ 127,708 $ 118,860 $ 80,347 Net income attributable to the Company $ 39,112 $ 70,720 $ 70,132 $ 43,785 Basic earnings per share $ 0.60 $ 1.07 $ 1.05 $ 0.65 Diluted earnings per share $ 0.56 $ 1.01 $ 1.00 $ 0.63 For the Fiscal Quarters Ended April 1, July 1, September 30, December 30, 2017 2017 2017 2017 Fiscal year ended December 30, 2017 Revenues, net $ 329,063 $ 341,673 $ 323,687 $ 312,488 Gross profit $ 164,097 $ 189,013 $ 177,088 $ 162,451 Operating income $ 30,233 $ 96,206 $ 91,378 $ 49,488 Net income attributable to the Company $ 10,653 $ 45,173 $ 44,719 $ 62,969 Basic earnings per share $ 0.17 $ 0.70 $ 0.69 $ 0.97 Diluted earnings per share $ 0.16 $ 0.67 $ 0.65 $ 0.91

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Disclosure Basis Of Presentation Details [Line Items]
Income before income taxes	$ 244,061	$ 145,080	$ 84,127
Net income attributable to Weight Watchers International, Inc.	223,749	163,514	67,699
Provision for (benefit from) income taxes	$ 20,493	$ (18,237)	16,634
Adjustments
Disclosure Basis Of Presentation Details [Line Items]
Income before income taxes			347
Net income attributable to Weight Watchers International, Inc.			1,791
Provision for (benefit from) income taxes			$ 2,138

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	May 06, 2018	Nov. 29, 2017	May 07, 2017	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Dec. 31, 2017
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Property, plant and equipment, impairment charges					$ 27,000	$ 8,000	$ 131,000
Goodwill impairment					$ 0	13,323,000	0
Percentage of goodwill hold by reporting units					97.00%
Goodwill				$ 156,281,000	$ 152,519,000	156,281,000
Indefinite-lived franchise rights acquired, book value					$ 747,348,000			$ 754,040,000
Franchise right maturity period					7 years
Total advertising expenses					$ 218,062,000	193,423,000	186,614,000
Write-off of deferred financing fees		$ 4,808,000		10,524,000		4,808,000
Discount on debt issuance		30,800,000		30,433,000	26,033,000	30,433,000
Gain (loss) on early debt extinguishment		$ (10,524,000)			0	(8,969,000)	0
Deferred financing costs, amortization expense					8,539,000	6,112,000	6,116,000
The cumulative balance of changes in fair value of derivative instruments, net of taxes				5,392,000	1,175,000	5,392,000	16,002,000
The cumulative balance of the effects of foreign currency translations, net of taxes				5,075,000	$ 14,582,000	5,075,000	11,118,000
Prepayment Of Debt
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Write-off of deferred financing fees						618,000
Deferred financing costs						305,000
Gain (loss) on early debt extinguishment						1,554,000
Restructuring Costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Deferred financing costs				53,832,000
Revolving Facility due April 2, 2018
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Deferred financing costs						5,716,000
Gain (loss) on early debt extinguishment						10,524,000
BRAZIL
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Goodwill impairment				13,323,000		13,323,000
Reporting unit, percentage of fair value in excess of carrying amount					10.00%
Goodwill, carrying amount					$ 5,001,000
Goodwill				5,372,000	4,584,000	5,372,000
United States
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Goodwill				97,755,000	98,857,000	97,755,000
Indefinite-lived franchise rights acquired, book value					671,914,000			671,914,000
Canada
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Goodwill				42,634,000	39,300,000	42,634,000
Indefinite-lived franchise rights acquired, book value					52,919,000			57,408,000
Other International
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Goodwill				$ 10,520,000	9,778,000	10,520,000
United Kingdom
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Indefinite-lived franchise rights acquired, book value					11,441,000			12,680,000
AUSTRALIA
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Indefinite-lived franchise rights acquired, book value					6,327,000			7,018,000
NEW ZEALAND
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Indefinite-lived franchise rights acquired, book value					4,747,000			$ 5,020,000
Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Indefinite-lived intangible assets, impairment charges	$ 0		$ 0
Capitalized software costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Property, plant and equipment, impairment charges					$ 0	$ 674,000	$ 484,000
Website development costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)					3 years
Minimum
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Equipment, estimated useful life (in years)					3 years
Reporting unit, percentage of fair value in excess of carrying amount					50.00%
Finite-lived intangible assets, estimated useful life (in years)					3 years
Minimum | Capitalized software costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)					3 years
Maximum
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Equipment, estimated useful life (in years)					10 years
Finite-lived intangible assets, estimated useful life (in years)					20 years
Maximum | Franchise Rights
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)					1 year
Maximum | Capitalized software costs
Organization And Summary Of Significant Accounting Policies Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life (in years)					5 years

Accounting Standards Adopted _2

Accounting Standards Adopted in Current Year - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 29, 2018	[1]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Tax Act from accumulated other comprehensive loss to retained earnings	$ 2,485	$ 2,485
Intra-Entity Transfers of Assets Other Than Inventory
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative adjustment to decrease retained earnings	$ 46,927
[1]	Amounts in parentheses indicate debits

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 31, 2017	Dec. 30, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Decrease to deferred revenue	$ (53,501)		$ (74,332)
Decrease to prepaid expenses and other current assets	(42,355)		(26,805)
Increase to deferred income tax liability	190,258		$ 143,591
Deferred revenue recognized	$ 70,625
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	$ 961
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								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 330,386	$ 365,765	$ 409,747	$ 408,223	$ 312,488	$ 323,687	$ 341,673	$ 329,063	$ 1,514,121	$ 1,306,911	$ 1,164,902
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net									567,767	416,722	343,789
Studio + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net									705,429	664,957	605,332
Service revenues, net
Disaggregation Of Revenue [Line Items]
Revenues, net									1,273,196	1,081,679	949,121
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net									$ 240,925	$ 225,232	$ 215,781

Revenue - Schedule of Revenue_2

Revenue - Schedule of Revenues Disaggregated by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 330,386	$ 365,765	$ 409,747	$ 408,223	$ 312,488	$ 323,687	$ 341,673	$ 329,063	$ 1,514,121	$ 1,306,911	$ 1,164,902
North America
Disaggregation Of Revenue [Line Items]
Revenues, net									1,047,251	910,349	798,827
Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net									304,325	239,223	210,590
United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net									107,072	99,989	100,808
Other
Disaggregation Of Revenue [Line Items]
Revenues, net									55,473	57,350	54,677
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net									567,767	416,722	343,789
Digital Subscription Revenues | North America
Disaggregation Of Revenue [Line Items]
Revenues, net									378,678	281,432	239,145
Digital Subscription Revenues | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net									149,571	102,039	75,014
Digital Subscription Revenues | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net									25,557	21,477	18,780
Digital Subscription Revenues | Other
Disaggregation Of Revenue [Line Items]
Revenues, net									13,961	11,774	10,850
Studio + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net									705,429	664,957	605,332
Studio + Digital Fees | North America
Disaggregation Of Revenue [Line Items]
Revenues, net									522,372	493,800	437,239
Studio + Digital Fees | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net									107,528	93,723	89,646
Studio + Digital Fees | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net									52,676	52,161	54,473
Studio + Digital Fees | Other
Disaggregation Of Revenue [Line Items]
Revenues, net									22,853	25,273	23,974
Service revenues, net
Disaggregation Of Revenue [Line Items]
Revenues, net									1,273,196	1,081,679	949,121
Service revenues, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net									901,050	775,232	676,384
Service revenues, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net									257,099	195,762	164,660
Service revenues, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net									78,233	73,638	73,253
Service revenues, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net									36,814	37,047	34,824
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net									240,925	225,232	215,781
Product sales and other, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net									146,201	135,117	122,443
Product sales and other, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net									47,226	43,461	45,930
Product sales and other, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net									28,839	26,351	27,555
Product sales and other, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net									$ 18,659	$ 20,303	$ 19,853

Revenue - Schedule of Accounts

Revenue - Schedule of Accounts Receivable and Deferred Revenues (Detail) $ in Thousands	12 Months Ended
	Dec. 29, 2018USD ($)
Deferred Revenue - Short Term
Contract With Customer Asset And Liability [Line Items]
Deferred Revenue, Beginning balance	$ 74,332
Adoption of accounting standard	(3,501)
Net decrease during the period	(17,330)
Deferred Revenue, Ending balance	53,501
Deferred Revenue - Long Term
Contract With Customer Asset And Liability [Line Items]
Deferred Revenue, Beginning balance	2,049
Adoption of accounting standard	0
Net decrease during the period	(1,088)
Deferred Revenue, Ending balance	$ 961

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 10, 2018	Aug. 10, 2018	Jun. 27, 2016	Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, goodwill				$ 152,519	$ 156,281
Kurbo Health, Inc.
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, net purchase price		$ 3,063
Business acquisition, purchase price allocation, goodwill		1,101
Business acquisition, purchase price allocation, prepaid expenses		78
Business acquisition, purchase price allocation, other assets		32
Business acquisition, purchase price allocation, deferred revenue		57
Business acquisition, purchase price allocation, other liabilities		7
South Carolina Acquisition
Business Acquisition [Line Items]
Business acquisition, net purchase price	$ 4,000
Business acquisition, assumed net liabilities	37
Weight Watchers of Greater Miami, Inc.
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, net purchase price			$ 3,250
Business acquisition, purchase price allocation, goodwill			2,945
Business acquisition, net purchase price			2,898
Business acquisition, assumed net liabilities			52
Business acquisition, cash acquired			300
Website Development | Kurbo Health, Inc.
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, finite lived intangible assets		$ 1,916
Franchise Rights | South Carolina Acquisition
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, net purchase price	4,000
Business acquisition, purchase price allocation, indefinite lived intangible assets	3,791
Franchise Rights | Weight Watchers of Greater Miami, Inc.
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, indefinite lived intangible assets			114
Customer Relationships | South Carolina Acquisition
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, finite lived intangible assets	$ 209
Customer Relationships | Weight Watchers of Greater Miami, Inc.
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, finite lived intangible assets			$ 191

Franchise Rights Acquired, Go_3

Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	May 06, 2018	May 07, 2017	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure
Goodwill impairment				$ 0	$ 13,323,000	$ 0
Finite-lived intangible assets, aggregate amortization expense				$ 28,995,000	36,040,000	$ 35,752,000
Franchise Rights | VPM
Goodwill and Intangible Assets Disclosure
Amortization period				2 years
Franchise Rights | Weight Watchers of Greater Miami, Inc.
Goodwill and Intangible Assets Disclosure
Amortization period				3 months
Franchise Rights | South Carolina Acquisition
Goodwill and Intangible Assets Disclosure
Amortization period				18 years
Franchise Rights
Goodwill and Intangible Assets Disclosure
Indefinite-lived intangible assets, impairment charges	$ 0	$ 0
BRAZIL
Goodwill and Intangible Assets Disclosure
Goodwill impairment			$ 13,323,000		$ 13,323,000

Changes in Carrying Values of G

Changes in Carrying Values of Goodwill (Detail) $ in Thousands	12 Months Ended
	Dec. 29, 2018USD ($)
Goodwill [Line Items]
Beginning balance	$ 156,281
Ending balance	152,519
Kurbo Health, Inc and Franchisee Acquisition
Goodwill [Line Items]
Beginning balance	156,281
Goodwill acquired during the period	1,101
Effect of exchange rate changes	(4,863)
Ending balance	152,519
Kurbo Health, Inc and Franchisee Acquisition | North America
Goodwill [Line Items]
Beginning balance	140,389
Goodwill acquired during the period	1,101
Effect of exchange rate changes	(3,334)
Ending balance	138,156
Kurbo Health, Inc and Franchisee Acquisition | Continental Europe
Goodwill [Line Items]
Beginning balance	7,759
Goodwill acquired during the period	0
Effect of exchange rate changes	(517)
Ending balance	7,242
Kurbo Health, Inc and Franchisee Acquisition | United Kingdom
Goodwill [Line Items]
Beginning balance	1,253
Goodwill acquired during the period	0
Effect of exchange rate changes	(75)
Ending balance	1,178
Kurbo Health, Inc and Franchisee Acquisition | Other
Goodwill [Line Items]
Beginning balance	6,880
Goodwill acquired during the period	0
Effect of exchange rate changes	(937)
Ending balance	$ 5,943

Carrying Amount of Finite-Lived

Carrying Amount of Finite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 260,915	$ 221,263
Accumulated Amortization	199,962	174,727
Capitalized software costs
Finite-Lived Intangible Assets
Gross Carrying Amount	121,508	111,617
Accumulated Amortization	102,659	94,697
Website development costs
Finite-Lived Intangible Assets
Gross Carrying Amount	105,710	90,096
Accumulated Amortization	77,825	61,125
Trademarks
Finite-Lived Intangible Assets
Gross Carrying Amount	11,620	11,231
Accumulated Amortization	11,010	10,833
Other
Finite-Lived Intangible Assets
Gross Carrying Amount	13,967	3,793
Accumulated Amortization	4,149	3,546
Trademarks and other intangible assets
Finite-Lived Intangible Assets
Gross Carrying Amount	252,805	216,737
Accumulated Amortization	195,643	170,201
Franchise Rights
Finite-Lived Intangible Assets
Gross Carrying Amount	8,110	4,526
Accumulated Amortization	$ 4,319	$ 4,526

Estimated Amortization Expense

Estimated Amortization Expense of Existing Finite-Lived Intangible Assets (Detail) $ in Thousands	Dec. 29, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Fiscal 2,019	$ 23,689
Fiscal 2,020	16,232
Fiscal 2,021	7,971
Fiscal 2,022	1,641
Fiscal 2023 and thereafter	$ 11,420

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Property Plant And Equipment [Abstract]
Equipment	$ 75,531	$ 70,126
Leasehold improvements	80,002	71,469
Property, Plant and Equipment, Gross, Total	155,533	141,595
Less: Accumulated depreciation and amortization	(103,331)	(93,617)
Property and equipment, net	$ 52,202	$ 47,978

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Depreciation and amortization expense, property and equipment	$ 15,066	$ 14,840	$ 16,881

Components of Current and Long-

Components of Current and Long-Term Debt (Detail) - USD ($)		Dec. 29, 2018	Dec. 30, 2017	Nov. 29, 2017
Debt Instrument
Total Debt		$ 1,782,250,000	$ 1,865,000,000
Less: Current Portion		77,000,000	82,750,000
Unamortized Deferred Financing Costs		9,509,000	11,205,000
Unamortized Debt Discount		26,033,000	30,433,000	$ 30,800,000
Total Long-Term Debt		$ 1,669,708,000	$ 1,740,612,000
Effective Interest Rate	[1]	7.63%	4.96%
Former Tranche B-2 Term Facility due April 2, 2020
Debt Instrument
Total Debt		$ 0	$ 0
Unamortized Deferred Financing Costs		0	0
Unamortized Debt Discount		$ 0	$ 0
Effective Interest Rate	[1]	0.00%	4.76%
New Term Loan due November 29, 2024
Debt Instrument
Total Debt		$ 1,482,250,000	$ 1,540,000,000
Unamortized Deferred Financing Costs		8,307,000	9,783,000
Unamortized Debt Discount		$ 26,033,000	$ 30,433,000
Effective Interest Rate	[1]	7.53%	6.84%
Notes due December 1, 2025
Debt Instrument
Total Debt		$ 300,000,000	$ 300,000,000
Unamortized Deferred Financing Costs		1,202,000	1,422,000
Unamortized Debt Discount		$ 0	$ 0
Effective Interest Rate	[1]	8.69%	8.82%
New Revolving Credit Facility due November 29, 2022
Debt Instrument
Total Debt		$ 0	$ 25,000,000
Less: Current Portion			25,000,000
Unamortized Deferred Financing Costs		0	0
Unamortized Debt Discount		$ 0	$ 0
Effective Interest Rate	[1]	4.39%	4.15%
[1]	Includes amortization of deferred financing costs and debt discount. For fiscal 2017, the effective interest rate for the tranche B-2 term facility of the Company’s then-existing term loan facility was computed based on interest expense incurred over the period for which borrowings were outstanding.

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)		Nov. 30, 2020	Nov. 29, 2017	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Debt Instrument
Total Debt					$ 1,782,250,000
Unamortized Debt Discount			$ 30,800,000	$ 30,433,000	26,033,000	$ 30,433,000
Write-off of deferred financing fees			4,808,000	10,524,000		4,808,000
Gain (loss) on early extinguishment of debt			(10,524,000)		0	(8,969,000)	$ 0
Debt outstanding amount				1,865,000,000	1,782,250,000	1,865,000,000
Portion of long-term debt due within one year				$ 82,750,000	$ 77,000,000	$ 82,750,000
Percentage of equity interests pledged					100.00%
Effective Interest Rate	[1]			4.96%	7.63%	4.96%
Average interest rate on outstanding debt, exclusive the impact of swap				7.12%	7.73%	7.12%
Average interest rate on outstanding debt, including the impact of swap					7.46%	7.34%
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
Total Debt				$ 1,798,362,000	$ 1,746,708,000	$ 1,798,362,000
Line off credit facility drawn amount				25,000,000	0	25,000,000
Deferred financing costs						5,716,000
Gain (loss) on early extinguishment of debt						10,524,000
New Revolving Credit Facility
Debt Instrument
Credit facility available amount					148,841,000
Total Debt			150,000,000
Unamortized Debt Discount				0	0	0
Debt outstanding amount				25,000,000	0	25,000,000
Line of credit facility, issued but undrawn letters of credit					$ 1,159,000
Portion of long-term debt due within one year				$ 25,000,000		$ 25,000,000
Effective Interest Rate	[1]			4.15%	4.39%	4.15%
Percentage of equity interests pledged					0.35%
New Term Loan Facility
Debt Instrument
Debt outstanding amount					$ 1,482,250,000
Term Loan Facility
Debt Instrument
Total Debt			1,540,000,000
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	$ 0
Debt outstanding amount				$ 300,000,000	$ 300,000,000	$ 300,000,000
Effective Interest Rate	[1]			8.82%	8.69%	8.82%
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 | New Term Loan Facility
Debt Instrument
Credit Facility, maximum borrowing capacity			$ 1,540,000,000
Debt Instrument, maturity year			2,024
Senior Secured Revolving Credit Facility | New Revolving Credit Facility
Debt Instrument
Credit Facility, maximum borrowing capacity			$ 150,000,000
Debt Instrument, maturity year			2,022
New Term Loan Facility
Debt Instrument
Total Debt					$ 1,482,250,000
New Term Loan Facility | Higher of Federal Funds Effective Rate and Overnight Bank Funding Rate
Debt Instrument
Credit facility, interest rate					0.50%
New 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%
New Term Loan Facility | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument
Debt instrument variable rate floor percent determined option one					1.75%
New Revolving Credit Facility
Debt Instrument
Total Debt					$ 0
New Revolving Credit Facility | Higher of Federal Funds Effective Rate and Overnight Bank Funding Rate
Debt Instrument
Credit facility, interest rate					0.50%
New Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument
Credit facility, interest rate					1.00%
Effective Interest Rate					2.25%
New Credit Facilities
Debt Instrument
Credit Facility, maximum borrowing capacity			$ 1,930,386,000
Total Debt			1,565,000,000		$ 1,782,250,000
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
[1]	Includes amortization of deferred financing costs and debt discount. For fiscal 2017, the effective interest rate for the tranche B-2 term facility of the Company’s then-existing term loan facility was computed based on interest expense incurred over the period for which borrowings were outstanding.

Long-Term Debt Maturities (Deta

Long-Term Debt Maturities (Detail) $ in Thousands	Dec. 29, 2018USD ($)
Debt Disclosure [Abstract]
2,019	$ 77,000
2,020	96,250
2,021	77,000
2,022	77,000
2,023	77,000
2024 and thereafter	1,378,000
Total Debt	$ 1,782,250

Treasury Stock - Additional Inf

Treasury Stock - Additional Information (Detail) - USD ($)	Oct. 09, 2003	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Oct. 21, 2010	May 25, 2006	Jun. 13, 2005
Class Of Stock Disclosures [Abstract]
Treasury Stock, value of common stock shares authorized for repurchase	$ 250,000,000				$ 250,000,000	$ 250,000,000	$ 250,000,000
Treasury Stock, common stock shares repurchased	0	0	0	0
Amount remained available to purchase shares under repurchase program		$ 208,933,000

Computation of Basic and Dilute

Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Numerator:
Net income attributable to Weight Watchers International, Inc.									$ 223,749	$ 163,514	$ 67,699
Denominator:
Weighted average shares of common stock outstanding									66,280	64,329	63,742
Effect of dilutive common stock equivalents									3,835	3,919	2,155
Weighted average diluted common shares outstanding									70,115	68,248	65,897
Earnings Per Share attributable to Weight Watchers International, Inc.
Basic	$ 0.65	$ 1.05	$ 1.07	$ 0.60	$ 0.97	$ 0.69	$ 0.70	$ 0.17	$ 3.38	$ 2.54	$ 1.06
Diluted	$ 0.63	$ 1	$ 1.01	$ 0.56	$ 0.91	$ 0.65	$ 0.67	$ 0.16	$ 3.19	$ 2.40	$ 1.03

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Anti-dilutive common stock equivalents excluded from the calculation of diluted earnings per share	419	1,427	1,536

Stock Plans - Additional Inform

Stock Plans - Additional Information (Detail) - USD ($)	1 Months Ended			12 Months Ended
	May 31, 2018	Jul. 31, 2017	May 31, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option awards granted during period				0
Share-based compensation expense				$ 20,188,000	$ 14,949,000	$ 6,527,000
Total income tax benefit recognized for all share-based compensation awards				4,007,000	3,580,000	1,849,000
Tax benefits realized from options exercised and RSUs and PSUs vested				30,268,000	$ 7,210,000	$ 2,114,000
Compensation costs capitalized				0
Total unrecognized compensation cost related to inducement option, stock options, RSUs and PSUs granted				$ 41,496,000
Compensation expense recognition period				1 year 7 months 6 days
Options outstanding, exercise price, lower range				$ 3.97	$ 3.97	$ 3.97
Options outstanding, exercise price, upper range				63.59	63.59	$ 63.59
Expected term						6 years
Weighted-average grant-date fair value of vesting options granted				$ 0	$ 15.21	$ 5.79
Total intrinsic value of vesting options exercised				$ 105,647,000	$ 5,930,000	$ 117,000
Cash received from options exercised				$ 33,385,000	$ 5,475,000	$ 139,000
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term					6 years
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term					7 years
Inducement Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option awards, expiration period					7 years
Restricted stock units, vesting period					4 years
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term				7 years
Stock Option | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option awards, expiration period				7 years
Restricted stock units, vesting period				3 years	3 years	3 years
Stock Option | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option awards, expiration period				10 years
Restricted stock units, vesting period				5 years	5 years	5 years
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term				7 years
Granted				$ 63.91	$ 31.58	$ 12.68
Other than options, total fair value				$ 8,484,000	$ 10,211,000	$ 5,145,000
Other than options, granted				274,000
Vested				379,000
Restricted Stock Units | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, vesting period				2 years
Restricted Stock Units | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, vesting period				4 years
Performance-based stock unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted				$ 80.18	$ 27.22	$ 13.19
Other than options, total fair value						$ 8,000
Other than options, granted	81,300	47,900	98,500	81,000		289,900
Performance period (years)					3 years
Net debt to EBITDA ratio						450.00%
Vested				0	0
Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, fully-vested shares granted					40,000
Share based compensation, value of fully-vested shares granted					$ 604,000
Chief Executive Officer | Inducement Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option awards granted during period					500,000
Stock Incentive Plan 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stocks to be purchased through options				8,500,000
Stock Incentive Plan 2004
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, fully-vested shares granted				11,000	30,000	36,000
Share based compensation, value of fully-vested shares granted				$ 754,000	$ 664,000	$ 451,000

Weighted Average Assumptions Us

Weighted Average Assumptions Used to Estimate Fair Value of Option Award on Grand Date (Detail)	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%	0.00%
Volatility,minimum	51.30%	49.60%
Volatility,maximum	51.70%	51.40%
Risk-free interest rate	2.17%
Risk-free interest rate, minimum		1.24%
Risk-free interest rate, maximum		2.26%
Expected term (years)		6 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	6 years
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	7 years

Summary of Option Activity Unde

Summary of Option Activity Under Stock Plans, Inducement Option and Winfrey Option (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2018USD ($)$ / sharesshares
Shares
Beginning Balance | shares	5,884,000
Granted | shares	0
Exercised | shares	(2,037,000)
Cancelled | shares	(58,000)
Ending Balance | shares	3,789,000
Exercisable at December 29, 2018 | shares	2,790,000
Weighted-Average Exercise Price
Beginning Balance | $ / shares	$ 18.17
Granted | $ / shares	0
Exercised | $ / shares	11.89
Cancelled | $ / shares	9.21
Ending Balance | $ / shares	21.69
Exercisable at December 29, 2018 | $ / shares	$ 13.27
Weighted-Average Remaining Contractual Life, Outstanding at December 29, 2018	6 years 2 months 12 days
Weighted-Average Remaining Contractual Life, Exercisable at December 29, 2018	6 years 6 months
Aggregate Intrinsic Value, Outstanding at December 29, 2018 | $	$ 84,871
Aggregate Intrinsic Value, Exercisable at December 29, 2018 | $	$ 81,774

Summary of RSU Activity Under S

Summary of RSU Activity Under Stock Plans (Detail) - Restricted Stock Units - $ / shares shares in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Shares
Beginning Balance	1,077
Granted	274
Vested	(379)
Forfeited	(91)
Ending Balance	881	1,077
Weighted-Average Grant-Date Fair Value
Beginning Balance	$ 24.22
Granted	63.91	$ 31.58	$ 12.68
Vested	22.38
Forfeited	21.07
Ending Balance	$ 37.91	$ 24.22

Summary of PSU Activity Under S

Summary of PSU Activity Under Stock Plans (Detail) - Performance-based stock unit - $ / shares	1 Months Ended			12 Months Ended
	May 31, 2018	Jul. 31, 2017	May 31, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Shares
Beginning Balance				330,000
Granted	81,300	47,900	98,500	81,000		289,900
Vested				0	0
Forfeited				(31,000)
Ending Balance				380,000	330,000
Weighted-Average Grant-Date Fair Value
Beginning Balance				$ 19.42
Granted				80.18	$ 27.22	$ 13.19
Vested				0
Forfeited				17.73
Ending Balance				$ 32.56	$ 19.42

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Effective income tax rate reconciliation at federal statutory income tax rate				21.00%	35.00%	35.00%
Tax Cuts and Jobs Act of 2017, net tax benefit				$ 2,678
Effective income tax rate				8.40%	(12.60%)	19.80%
Tax windfall on share-based awards				$ 25,353
Reversal of valuation allowance on foreign tax credits carryforwards				8,535
Reversal of valuation allowance on net operating losses expected to be realized				3,435
Reversal of tax reserves		$ 2,255		3,430	$ 2,255
Favorable tax return adjustments				2,678
Benefit on closure of subsidiary			$ 11,633	1,858	11,633
Tax cuts and jobs act of 2017, tax expenses					56,560
Tax cuts and jobs act of 2017, incomplete accounting, change in tax rate, deferred tax liability, provisional income tax benefit					68,654
Federal foreign tax credit carryforwards	$ 8,964				8,964
Net charge from other items					3,130
Tax benefit due to change in estimate related to availability of foreign tax credits	3,735				3,735
Net operating loss carry forwards	69,359			38,098	69,359
Tax Cuts and Jobs Act of 2017, undistributed foreign earnings				5,190
Total amount of unrecognized tax benefits, if recognized, would affect effective tax rate				2,319
Tax benefit				(20,493)	18,237	$ (16,634)
Valuation allowance amount	22,760			6,191	22,760
Unrecognized tax benefits, accrued interest and penalties	$ 515			186	515
Unrecognized tax benefits, interest and penalties recognized				$ (65)	$ 63	$ (777)
Foreign Tax Authority | Earliest Tax Year
Income Taxes [Line Items]
Income tax examination year				2,013
Foreign Tax Authority | Latest Tax Year
Income Taxes [Line Items]
Income tax examination year				2,017
IRS | Tax Years 2012 and 2013
Income Taxes [Line Items]
Tax benefit				$ 1,890
Netherlands
Income Taxes [Line Items]
Valuation allowance amount				$ 3,434

Income Taxes - Summary of Conso

Income Taxes - Summary of Consolidated Provision for US Federal State and Foreign Taxes on Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Current:
U.S. federal	$ 1,235	$ 9,224	$ (15,254)
State	5,918	1,993	604
Foreign	27,013	18,762	20,191
Current Income Tax Expense (Benefit), Total	34,166	29,979	5,541
Deferred:
U.S. federal	(10,367)	(51,788)	10,980
State	(2,566)	481	1,877
Foreign	(740)	3,091	(1,764)
Deferred tax provision	(13,673)	(48,216)	11,093
Total tax provision (benefit)	$ 20,493	$ (18,237)	$ 16,634

Income Taxes - Components of Co

Income Taxes - Components of Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic	$ 126,171	$ 53,045	$ 26,367
Foreign	117,890	92,035	57,760
Income before income taxes	$ 244,061	$ 145,080	$ 84,127

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)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	35.00%	35.00%
State income taxes (net of federal benefit)	1.10%	2.50%	2.00%
Cessation of operations	(0.80%)	(8.00%)	0.00%
Research and development credit	(0.50%)	(1.30%)	(19.50%)
Tax windfall on share-based awards	(8.60%)	(1.10%)	0.00%
Reserves for uncertain tax positions	(1.40%)	(0.20%)	2.90%
Tax rate changes	0.30%	(49.60%)	0.00%
(Decrease) increase in valuation adjustment related to foreign tax credits	(3.50%)	3.50%	(2.30%)
GILTI	1.50%	0.00%	0.00%
FDII	(1.90%)	0.00%	0.00%
(Decrease) increase in valuation allowance due to net operating loss	(0.70%)	3.00%	0.00%
Goodwill impairment	0.00%	3.20%	0.00%
Tax return adjustments related to 2017 Tax Act	(1.10%)	0.00%	0.00%
Impact of foreign operations	3.20%	(0.70%)	0.00%
Out-of-period adjustments	0.00%	0.00%	2.60%
Other	(0.20%)	1.10%	(0.90%)
Total effective tax rate	8.40%	(12.60%)	19.80%

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Interest expense disallowance	$ 22,418	$ 2,452
Operating loss carryforwards	9,862	17,424
Provision for estimated expenses	2,320	2,307
Depreciation	0	1,005
Salaries and wages	2,518	1,579
Share-based compensation	7,666	8,016
Foreign tax credit carryforwards	0	8,964
Other comprehensive income	5,877	4,797
Other	7,481	6,539
Less: valuation allowance	(6,191)	(22,760)
Total deferred tax assets	51,951	30,323
Goodwill and intangible assets	(223,938)	(166,257)
Depreciation	(1,149)	0
Other	(886)	(1,025)
Total deferred tax liabilities	(225,973)	(167,282)
Net deferred tax liabilities	$ (174,022)	$ (136,959)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 15,173	$ 10,297	$ 8,261
Increases related to tax positions taken in current year	60	266	1,291
Increases related to tax positions taken in prior years	1,207	7,246	5,508
Reductions related to tax positions taken in prior years	(10,560)	(1,268)	(840)
Reductions related to settlements with tax authorities	(2,215)	0	(1,700)
Reductions related to the expiration of statutes of limitations	0	(1,369)	(2,223)
Balance at end of year	$ 3,665	$ 15,173	$ 10,297

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Profit Sharing Plan
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plans, contribution cost	$ 1,317	$ 1,195	$ 1,027
Profit Sharing Plan | Management
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plans, contribution cost	$ 2,913	$ 2,382	$ 1,915
EPSP annualized interest rate, added percentage above prime rate	2.00%
Maximum | Profit Sharing Plan | Management
Defined Contribution Plan Disclosure [Line Items]
EPSP annualized interest rate cap	15.00%
Savings Plan
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plans, employer contribution percentage	6.00%	6.00%	6.00%
Employee benefit plans, contribution cost	$ 3,405	$ 2,676	$ 1,945
Savings Plan | Maximum
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plans, employer matching contribution percentage	50.00%	50.00%	50.00%

Cash Flow Information (Detail)

Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Net cash paid during the year for:
Interest expense	$ 119,866	$ 115,233	$ 112,942
Income taxes	12,095	27,282	25,516
Noncash investing and financing activities were as follows:
Fair value of net assets acquired in connection with acquisitions	6,026	0	305
Change in Capital expenditures and Capitalized software included in accounts payable and accrued expenses	$ (844)	$ (3,450)	$ 2,098

Minimum Commitments Under Non-C

Minimum Commitments Under Non-Cancelable Obligations (Detail) $ in Thousands	Dec. 29, 2018USD ($)
Leases [Abstract]
2,019	$ 63,261
2,020	38,491
2,021	22,341
2,022	14,017
2,023	9,192
2024 and thereafter	37,704
Total	$ 185,006

Commitment and Contingencies -

Commitment and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Rent expense charged to operations under operating leases	$ 44,130	$ 42,259	$ 40,927

Segment and Geographic Data - A

Segment and Geographic Data - Additional Information (Detail)	12 Months Ended
	Dec. 29, 2018Segment
Segment Reporting [Abstract]
Number of reportable segments	4

Information About Reportable Se

Information About Reportable Segments (Detail) - USD ($) $ in Thousands	Nov. 29, 2017	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net revenue		$ 330,386	$ 365,765	$ 409,747	$ 408,223	$ 312,488	$ 323,687	$ 341,673	$ 329,063	$ 1,514,121	$ 1,306,911	$ 1,164,902
Operating income		80,347	118,860	127,708	62,073	49,488	91,378	96,206	30,233	388,985	267,305	200,811
Interest expense										142,346	112,784	115,160
Other expense, net										2,578	472	1,524
Early extinguishment of debt, net	$ 10,524									0	8,969	0
Provision for (benefit from) income taxes										20,493	(18,237)	16,634
Net income		$ 43,785	$ 70,132	$ 70,720	$ 39,112	$ 62,969	$ 44,719	$ 45,173	$ 10,653	223,568	163,317	67,493
Net loss attributable to the noncontrolling interest										181	197	206
Net income attributable to Weight Watchers International, Inc.										223,749	163,514	67,699
Depreciation and amortization										52,600	56,992	58,749
Operating Segments
Segment Reporting Information [Line Items]
Operating income										494,725	336,857	249,398
Depreciation and amortization										40,568	42,535	45,125
General corporate expenses
Segment Reporting Information [Line Items]
General corporate expenses										105,740	69,552	48,587
Depreciation and amortization										12,032	14,457	13,624
North America
Segment Reporting Information [Line Items]
Net revenue										1,047,251	910,349	798,827
North America | Operating Segments
Segment Reporting Information [Line Items]
Operating income										351,599	247,587	175,290
Depreciation and amortization										37,137	39,501	41,718
United Kingdom
Segment Reporting Information [Line Items]
Net revenue										107,072	99,989	100,808
United Kingdom | Operating Segments
Segment Reporting Information [Line Items]
Operating income										18,814	19,939	14,199
Depreciation and amortization										1,487	1,205	971
Continental Europe
Segment Reporting Information [Line Items]
Net revenue										304,325	239,223	210,590
Continental Europe | Operating Segments
Segment Reporting Information [Line Items]
Operating income										114,708	73,689	51,096
Depreciation and amortization										1,347	1,203	1,621
Other
Segment Reporting Information [Line Items]
Net revenue										55,473	57,350	54,677
Other | Operating Segments
Segment Reporting Information [Line Items]
Operating income										9,604	(4,358)	8,813
Depreciation and amortization										$ 597	$ 626	$ 815

Sources of Revenue and Other In

Sources of Revenue and Other Information by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	$ 330,386	$ 365,765	$ 409,747	$ 408,223	$ 312,488	$ 323,687	$ 341,673	$ 329,063	$ 1,514,121	$ 1,306,911	$ 1,164,902
Long-lived assets	52,202				47,978				52,202	47,978	49,574
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									974,843	846,249	743,668
Long-lived assets	43,772				42,114				43,772	42,114	43,714
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									72,408	64,100	55,159
Long-lived assets	4,825				2,563				4,825	2,563	2,730
United Kingdom
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									107,072	99,989	100,808
Long-lived assets	1,924				1,920				1,924	1,920	1,899
Continental Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									304,325	239,223	210,590
Long-lived assets	1,257				642				1,257	642	716
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									55,473	57,350	54,677
Long-lived assets	$ 424				$ 739				424	739	515
Digital Subscription Revenues
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									567,767	416,722	343,789
Studio + Digital Fees
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									705,429	664,957	605,332
In-Workshop Product sales
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									148,856	137,855	125,508
Licensing, Franchise Royalties and Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue									$ 92,069	$ 87,377	$ 90,273

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Dec. 29, 2018	Dec. 30, 2017
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt outstanding amount	$ 1,782,250,000
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 Facility due April 2, 2018
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value of long-term debt	0	25,000,000
Fair value of long-term debt	1,757,717,000	1,810,085,000
Debt outstanding amount	$ 1,746,708,000	$ 1,798,362,000

Aggregate Fair Value of Derivat

Aggregate Fair Value of Derivative Financial Instruments (Detail) - Fair Value, Measurements, Recurring - Interest Rate Swap - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap asset	$ 3,924
Interest rate swap liability	5,578	$ 12,171
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
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	3,924
Interest rate swap liability	5,578	12,171
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
Interest rate swap liability	$ 0	$ 0

Derivative Instruments and He_2

Derivative Instruments and Hedging - Additional Information (Detail) - USD ($)	Jun. 11, 2018	Jul. 26, 2013	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Derivative
Cumulative losses for qualifying hedges reported as a component of accumulated other comprehensive loss net of tax			$ 1,175,000	$ 5,392,000	$ 16,002,000
Maximum length of time hedging forecasted			2 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			$ 2,555,000
Derivative gains included in accumulated other comprehensive income(loss) that are expected to be reclassified into earnings within the next 12 months, before tax			$ 3,425,000
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			$ 1,175,000	5,392,000
Cumulative losses for qualifying hedges reported as a component of accumulated other comprehensive loss before tax			1,634,000	8,839,000
Interest Rate Swap | Other Current Asset
Derivative
Interest rate swap asset			3,526,000
Interest Rate Swap | Other Noncurrent Asset
Derivative
Interest rate swap asset			398,000
Interest Rate Swap | Derivative Payable
Derivative
Interest rate swap liability				12,171,000
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			$ 5,578,000

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2018	Dec. 29, 2018		Dec. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			$ (1,015,986)		$ (1,207,573)	$ (1,290,158)
Other comprehensive income (loss) before reclassifications, net of tax	[1]		(5,293)		6,104	(4,263)
Amounts reclassified from accumulated other comprehensive loss, net of tax	[1],[2]		2,115		10,514	14,863
Adoption of accounting standard		$ (2,485)	(2,485)	[1]
Net current period other comprehensive income (loss) including noncontrolling interest	[1]		(5,663)		16,618	10,600
Less: net current period other comprehensive income (loss) attributable to the noncontrolling interest	[1]		373		35	(455)
Ending balance			(808,943)		(1,015,986)	(1,207,573)
Loss on Qualifying Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]		(5,392)		(16,002)	(23,135)
Other comprehensive income (loss) before reclassifications, net of tax	[1]		3,263		883	(7,730)
Amounts reclassified from accumulated other comprehensive loss, net of tax	[1],[2]		2,115		9,727	14,863
Adoption of accounting standard	[1]		(1,161)
Net current period other comprehensive income (loss) including noncontrolling interest	[1]		4,217		10,610	7,133
Less: net current period other comprehensive income (loss) attributable to the noncontrolling interest	[1]		0		0	0
Ending balance	[1]		(1,175)		(5,392)	(16,002)
Loss on Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]		(5,075)		(11,118)	(14,130)
Other comprehensive income (loss) before reclassifications, net of tax	[1]		(8,556)		5,221	3,467
Amounts reclassified from accumulated other comprehensive loss, net of tax	[1],[2]		0		787	0
Adoption of accounting standard	[1]		(1,324)
Net current period other comprehensive income (loss) including noncontrolling interest	[1]		(9,880)		6,008	3,467
Less: net current period other comprehensive income (loss) attributable to the noncontrolling interest	[1]		373		35	(455)
Ending balance	[1]		(14,582)		(5,075)	(11,118)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]		(10,467)		(27,120)	(37,265)
Ending balance	[1]		$ (15,757)		$ (10,467)	$ (27,120)
[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								12 Months Ended
		Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense										$ (142,346)	$ (112,784)	$ (115,160)
Other expense (income), net										2,578	472	1,524
Income before income taxes										(244,061)	(145,080)	(84,127)
Provision for (benefit from) income taxes										20,493	(18,237)	16,634
Net income		$ (43,785)	$ (70,132)	$ (70,720)	$ (39,112)	$ (62,969)	$ (44,719)	$ (45,173)	$ (10,653)	(223,568)	(163,317)	(67,493)
Loss on Qualifying Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	[1]									(2,835)	(15,946)	(24,366)
Provision for (benefit from) income taxes	[1]									720	6,219	9,503
Net income	[1]									(2,115)	(9,727)	(14,863)
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]									(2,835)	(15,946)	(24,366)
Loss on Foreign Currency Translation | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	[1]									0	(787)	0
Income before income taxes	[1]									0	(787)	0
Provision for (benefit from) income taxes	[1]									0	0	0
Net income	[1]									$ 0	$ (787)	$ 0
[1]	Amounts in parentheses indicate debits to profit / loss

Recently Issued Accounting Pr_2

Recently Issued Accounting Pronouncements - Additional Information (Detail)	Dec. 29, 2018USD ($)
Minimum
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Expected impact of operating leases on consolidated balance sheet	$ 140,000
Maximum
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Expected impact of operating leases on consolidated balance sheet	$ 180,000

Related Party - Additional Info

Related Party - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Stock options exercised	2,037
Ms. Winfrey and her related entities
Related Party Transaction [Line Items]
Related Party Transaction, service provided by related party	$ 2,208	$ 4,266	$ 3,453
Ms. Winfrey
Related Party Transaction [Line Items]
Purchased good from related entity		84	$ 627
Accounts payable to related parties	$ 62	$ 828
Number of shares purchased from related party	954
Stock options exercised	1,405

Summary of Unaudited Quarterly

Summary of Unaudited Quarterly Consolidated Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues, net	$ 330,386	$ 365,765	$ 409,747	$ 408,223	$ 312,488	$ 323,687	$ 341,673	$ 329,063	$ 1,514,121	$ 1,306,911	$ 1,164,902
Gross profit	185,220	215,394	244,794	221,003	162,451	177,088	189,013	164,097	866,410	692,649	585,501
Operating income	80,347	118,860	127,708	62,073	49,488	91,378	96,206	30,233	388,985	267,305	200,811
Net income attributable to the Company	$ 43,785	$ 70,132	$ 70,720	$ 39,112	$ 62,969	$ 44,719	$ 45,173	$ 10,653	$ 223,568	$ 163,317	$ 67,493
Basic earnings per share	$ 0.65	$ 1.05	$ 1.07	$ 0.60	$ 0.97	$ 0.69	$ 0.70	$ 0.17	$ 3.38	$ 2.54	$ 1.06
Diluted earnings per share	$ 0.63	$ 1	$ 1.01	$ 0.56	$ 0.91	$ 0.65	$ 0.67	$ 0.16	$ 3.19	$ 2.40	$ 1.03

Quarterly Financial Informati_3

Quarterly Financial Information - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Nov. 29, 2017	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Quarterly Financial Information [Line Items]
Impairment charge										$ 0	$ 13,323	$ 0
Diluted		$ 0.63	$ 1	$ 1.01	$ 0.56	$ 0.91	$ 0.65	$ 0.67	$ 0.16	$ 3.19	$ 2.40	$ 1.03
Write off of deferred financing costs in connection with debt refinancing	$ 4,808					$ 10,524					$ 4,808
Income tax (benefit) related to 2017 Tax Act						(56,560)
Income tax (benefit) from closure of Spainish subsidary									$ (11,633)	$ (1,858)	(11,633)
Reversal of tax reserves from updated transfer pricing study							$ 2,255			$ 3,430	2,255
Tax benefit due to change in estimate related to availability of foreign tax credits						$ 3,735					3,735
2017 Tax Act
Quarterly Financial Information [Line Items]
Diluted						$ 0.82
Disposition of Spanish subsidiary
Quarterly Financial Information [Line Items]
Diluted									$ 0.17
Reversal of tax reserves
Quarterly Financial Information [Line Items]
Diluted							$ 0.03
Foreign tax credits
Quarterly Financial Information [Line Items]
Diluted						0.05
Debt refinancing
Quarterly Financial Information [Line Items]
Diluted						$ 0.09
BRAZIL
Quarterly Financial Information [Line Items]
Impairment charge						$ 13,323					$ 13,323
Diluted						$ 0.19

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Allowance for doubtful accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 2,001	$ 2,973	$ 2,226
Additions charged to Costs and Expenses		130	(587)	363
Additions charged to Other Accounts		0	0	384
Deductions	[1]	(388)	(385)	0
Balance at End of Period		1,743	2,001	2,973
Inventory and other reserves
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		3,984	3,703	4,065
Additions charged to Costs and Expenses		7,906	7,823	5,109
Additions charged to Other Accounts		0	0	0
Deductions	[1]	(8,047)	(7,542)	(5,471)
Balance at End of Period		3,843	3,984	3,703
Tax valuation allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		22,760	18,277	28,280
Additions charged to Costs and Expenses		1,893	11,515	2,258
Additions charged to Other Accounts		(403)	1,079	(483)
Deductions	[1]	(18,059)	(8,111)	(11,778)
Balance at End of Period		$ 6,191	$ 22,760	$ 18,277
[1]	Primarily represents the utilization of established reserves, net of recoveries, where applicable.