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Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jan. 02, 2016	Jul. 04, 2015	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Disclosure Basis Of Presentation Details [Line Items]
Income before income taxes			$ 55,614	$ 183,664	$ 332,360
Net income attributable to Weight Watchers International, Inc.			32,945	117,787	202,742
Provision for income taxes			22,835	$ 65,931	$ 129,618
Adjustments
Disclosure Basis Of Presentation Details [Line Items]
Income before income taxes			1,650
Net income attributable to Weight Watchers International, Inc.	$ 410	$ 420	320
Provision for income taxes			$ 1,970

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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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