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Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Lessee Lease Description [Line Items]
Sublease income	$ 931	$ 2,455
Lease weighted average remaining lease term		7 years 5 months 1 day
Minimum
Lessee Lease Description [Line Items]
Leases, remaining lease term		0 years
Maximum
Lessee Lease Description [Line Items]
Leases, remaining lease term		9 years

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Lease weighted average remaining lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	ww_
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Balance Type:	na
Period Type:	duration

X

- Definition

Lessee remaining lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	ww_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Details

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- Details

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