    <SEC-DOCUMENT>0001193125-21-114794-index.html : 20210413
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    <ACCEPTANCE-DATETIME>20210413171004
    ACCESSION NUMBER:		0001193125-21-114794
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		15
    CONFORMED PERIOD OF REPORT:	20210413
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Termination of a Material Definitive Agreement
    ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20210413
    DATE AS OF CHANGE:		20210413

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			WW INTERNATIONAL, INC.
    		CENTRAL INDEX KEY:			0000105319
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PERSONAL SERVICES [7200]
    		IRS NUMBER:				116040273
    		STATE OF INCORPORATION:			VA
    		FISCAL YEAR END:			0101

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-16769
    		FILM NUMBER:		21823660

    	BUSINESS ADDRESS:
    		STREET 1:		675 AVENUE OF THE AMERICAS
    		STREET 2:		6TH FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10010
    		BUSINESS PHONE:		2125892700

    	MAIL ADDRESS:
    		STREET 1:		675 AVENUE OF THE AMERICAS
    		STREET 2:		6TH FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10010

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	WEIGHT WATCHERS INTERNATIONAL INC
    		DATE OF NAME CHANGE:	19991123
    </SEC-HEADER>
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    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>d163408d8k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: d163408d8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-4.1
    <SEQUENCE>2
    <FILENAME>d163408dex41.htm
    <DESCRIPTION>EX-4.1
    <TEXT>
    Document 2 - file: d163408dex41.htm

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    <TYPE>EX-10.1
    <SEQUENCE>3
    <FILENAME>d163408dex101.htm
    <DESCRIPTION>EX-10.1
    <TEXT>
    Document 3 - file: d163408dex101.htm

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    <SEQUENCE>4
    <FILENAME>d163408dex102.htm
    <DESCRIPTION>EX-10.2
    <TEXT>
    Document 4 - file: d163408dex102.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>ww-20210413.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 5 - file: ww-20210413.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>ww-20210413_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 6 - file: ww-20210413_lab.xml

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    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>ww-20210413_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 7 - file: ww-20210413_pre.xml

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    <TYPE>XML
    <SEQUENCE>8
    <FILENAME>d163408d8k_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    Document 8 - RAW XML: d163408d8k_htm.xml

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    <TYPE>XML
    <SEQUENCE>9
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 9 - file: R1.htm

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>10
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 10 - file: Financial_Report.xlsx

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: Show.js

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: report.css

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: FilingSummary.html

    Document 13 - RAW XML: FilingSummary.xml

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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>15
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: MetaLinks.json

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    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>16
    <FILENAME>0001193125-21-114794-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: 0001193125-21-114794-xbrl.zip

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