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v3.23.3

Basis of Presentation - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2023
Income Taxes [Line Items] |
Percentage of equity interest of physician-owners | 100.00%

X
- Definition Income taxes. + References No definition available. + Details
Name: | ww_IncomeTaxesLineItems
Namespace Prefix: | ww_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of equity interest of physician-owners + References No definition available. + Details
Name: | ww_PercentageOfEquityInterestOfPhysicianOwners
Namespace Prefix: | ww_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration