CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Revenues, net	$ 1,378,124	$ 1,413,337	$ 1,514,121
Cost of revenues	600,283	626,655	647,711
Gross profit	777,841	786,682	866,410
Marketing expenses	260,727	243,998	226,319
Selling, general and administrative expenses	297,287	254,699	251,106
Goodwill impairment	3,665	0	0
Operating income	216,162	287,985	388,985
Interest expense	123,310	135,267	142,346
Other expense, net	349	1,758	2,578
Income before income taxes	92,503	150,960	244,061
Provision for income taxes	17,462	31,513	20,493
Net income	75,041	119,447	223,568
Net loss attributable to the noncontrolling interest	38	169	181
Net income attributable to WW International, Inc.	$ 75,079	$ 119,616	$ 223,749
Earnings per share attributable to WW International, Inc.
Basic	$ 1.11	$ 1.78	$ 3.38
Diluted	$ 1.07	$ 1.72	$ 3.19
Weighted average common shares outstanding
Basic	67,849	67,188	66,280
Diluted	70,020	69,550	70,115
Subscription
Revenues, net	$ 1,186,489	$ 1,207,266	$ 1,273,196
Cost of revenues	452,882	502,907	508,477
Product and Other
Revenues, net	191,635	206,071	240,925
Cost of revenues	$ 147,401	$ 123,748	$ 139,234