Net Income Per Share - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
	May 08, 2023	May 31, 2023	Dec. 31, 2023	Jul. 24, 2023	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022	Oct. 01, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock authorized (in shares)			12,500,000,000		12,500,000,000
Common stock issued (in shares)			1,915,407,047		1,915,407,047
Common stock shares outstanding,		1,716,160,000	1,915,057,047		1,915,057,047
Dilutive equity instruments (in shares)	0			0	4,190,000	0	0
Antidilutive securities excluded from computation of earnings per share, amount (in shares)					44,745,842
Number of shares authorized to be repurchased (in shares)								27,000,000
Issuance of Treasury Stock (in shares)			350,000
Purchase of treasury stock			$ 7		$ 7
Shares acquired, average cost per share (in dollars per share)			$ 20.47
Kenvue IPO
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares issued in transaction (in shares)		1,716,159,990