Basis of Presentation	12 Months Ended
Dec. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying consolidated financial statements include the accounts of WW International, Inc., all of its subsidiaries and the variable interest entities of which WW International, Inc. is the primary beneficiary (as discussed below). The terms “Company” and “WW” as used throughout these notes are used to indicate WW 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, which formerly included Digital 360 (as applicable). The Company’s “Workshops + Digital” business refers to providing unlimited access to the Company’s workshops combined with the Company’s digital subscription product offerings to commitment plan subscribers, including former Digital 360 members (as applicable). It also formerly included the provision of access to workshops for members who did not subscribe to commitment plans, which included the Company’s “pay-as-you-go” members. The Company’s “Clinical” business refers to providing subscriptions to the Company’s clinical product offerings provided by WeightWatchers Clinic (formally referred to as Sequence). In the second quarter of fiscal 2022, the Company ceased offering its Digital 360 product. More than a majority of associated members were transitioned from the Company’s Digital business to its Workshops + Digital business during the second quarter of fiscal 2022, with a de minimis number transitioning during the beginning of the third quarter of fiscal 2022. The cessation of this product offering and these transitions of former Digital 360 members at the then-current pricing for such product impacted the number of End of Period Subscribers in each business as well as the associated Paid Weeks and Revenues for each business. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“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. On April 10, 2023, the Company completed its previously announced acquisition of Weekend Health, Inc., doing business as Sequence (“Sequence”). The accompanying consolidated financial statements include the results of operations of Sequence (now operating as WeightWatchers Clinic) from the date of acquisition. See Note 6 for additional information on the Company’s acquisitions. With respect to the Company’s previously announced change in segment reporting for fiscal 2023, segment data for the fiscal years ended December 31, 2022 and January 1, 2022 has been updated to reflect this reportable segment structure. See Notes 5 and 17 for disclosures related to segments. Prior period amounts have been reclassified to conform with the current period presentation. Revision of Previously Issued Consolidated Financial Statements As previously disclosed, after the three months ended September 30, 2023, the Company identified misstatements in its accounting for income taxes resulting primarily from the recording of a U.S. deferred tax liability related to a foreign branch of the U.S., partially offset by a U.S. deferred tax asset related to its U.S. leases, that should have been recorded in prior fiscal years. The Company evaluated the misstatements and concluded that the misstatements were not material, either individually or in aggregate, to its current or previously issued consolidated financial statements. To correct the immaterial misstatements, the Company has revised its previously issued consolidated financial statements as of and for the year ended December 31, 2022 and for the year ended January 1, 2022. The revision of the historical consolidated financial statements also includes the correction of other immaterial misstatements that the Company had primarily previously recorded as out-of-period adjustments or did not record on the basis of materiality. The Company had previously determined that these previously identified misstatements did not, either individually or in the aggregate, result in a material misstatement of its previously issued consolidated financial statements and reached the same conclusion when aggregating the previously identified misstatements with the recently identified misstatements. See Note 24 for further information regarding the misstatements and related revisions. The accompanying financial statements and relevant notes to the consolidated financial statements for the periods referenced above and prior in this Annual Report on Form 10-K have been revised to correct for such misstatements.

Basis of Presentation

12 Months Ended

Dec. 30, 2023

The accompanying consolidated financial statements include the accounts of WW International, Inc., all of its subsidiaries and the variable interest entities of which WW International, Inc. is the primary beneficiary (as discussed below). The terms “Company” and “WW” as used throughout these notes are used to indicate WW 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, which formerly included Digital 360 (as applicable). The Company’s “Workshops + Digital” business refers to providing unlimited access to the Company’s workshops combined with the Company’s digital subscription product offerings to commitment plan subscribers, including former Digital 360 members (as applicable). It also formerly included the provision of access to workshops for members who did not subscribe to commitment plans, which included the Company’s “pay-as-you-go” members. The Company’s “Clinical” business refers to providing subscriptions to the Company’s clinical product offerings provided by WeightWatchers Clinic (formally referred to as Sequence). In the second quarter of fiscal 2022, the Company ceased offering its Digital 360 product. More than a majority of associated members were transitioned from the Company’s Digital business to its Workshops + Digital business during the second quarter of fiscal 2022, with a de minimis number transitioning during the beginning of the third quarter of fiscal 2022. The cessation of this product offering and these transitions of former Digital 360 members at the then-current pricing for such product impacted the number of End of Period Subscribers in each business as well as the associated Paid Weeks and Revenues for each business.

The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“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.

On April 10, 2023, the Company completed its previously announced acquisition of Weekend Health, Inc., doing business as Sequence (“Sequence”). The accompanying consolidated financial statements include the results of operations of Sequence (now operating as WeightWatchers Clinic) from the date of acquisition. See Note 6 for additional information on the Company’s acquisitions.

With respect to the Company’s previously announced change in segment reporting for fiscal 2023, segment data for the fiscal years ended December 31, 2022 and January 1, 2022 has been updated to reflect this reportable segment structure. See Notes 5 and 17 for disclosures related to segments.

Prior period amounts have been reclassified to conform with the current period presentation.

Revision of Previously Issued Consolidated Financial Statements

As previously disclosed, after the three months ended September 30, 2023, the Company identified misstatements in its accounting for income taxes resulting primarily from the recording of a U.S. deferred tax liability related to a foreign branch of the U.S., partially offset by a U.S. deferred tax asset related to its U.S. leases, that should have been recorded in prior fiscal years. The Company evaluated the misstatements and concluded that the misstatements were not material, either individually or in aggregate, to its current or previously issued consolidated financial statements.

To correct the immaterial misstatements, the Company has revised its previously issued consolidated financial statements as of and for the year ended December 31, 2022 and for the year ended January 1, 2022. The revision of the historical consolidated financial statements also includes the correction of other immaterial misstatements that the Company had primarily previously recorded as out-of-period adjustments or did not record on the basis of materiality. The Company had previously determined that these previously identified misstatements did not, either individually or in the aggregate, result in a material misstatement of its previously issued consolidated financial statements and reached the same conclusion when aggregating the previously identified misstatements with the recently identified misstatements. See Note 24 for further information regarding the misstatements and related revisions.

The accompanying financial statements and relevant notes to the consolidated financial statements for the periods referenced above and prior in this Annual Report on Form 10-K have been revised to correct for such misstatements.