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Document and Entity Information - shares	3 Months Ended
	Apr. 02, 2016	Apr. 29, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 02, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Trading Symbol	WTW
Entity Registrant Name	WEIGHT WATCHERS INTERNATIONAL INC
Entity Central Index Key	0000105319
Current Fiscal Year End Date	--01-02
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		63,834,701

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