Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 29, 2019	Feb. 10, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 29, 2019
Document Transition Report	false
Entity File Number	1-3215
Entity Registrant Name	JOHNSON & JOHNSON
Entity Incorporation, State or Country Code	NJ
Entity Tax Identification Number	22-1024240
Entity Address, Address Line One	One Johnson & Johnson Plaza
Entity Address, City or Town	New Brunswick
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08933
City Area Code	732
Local Phone Number	524-0400
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Public Float			$ 368
Entity Common Stock, Shares Outstanding		2,634,721,257
Entity Central Index Key	0000200406
Current Fiscal Year End Date	--12-29
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock, Par Value $1.00
Document Information [Line Items]
Title of 12(b) Security	Common Stock, Par Value $1.00
Trading Symbol	JNJ
Security Exchange Name	NYSE
0.250% Notes Due January 2022
Document Information [Line Items]
Title of 12(b) Security	0.250% Notes Due January 2022
Trading Symbol	JNJ
Security Exchange Name	NYSE
0.650% Notes Due May 2024
Document Information [Line Items]
Title of 12(b) Security	0.650% Notes Due May 2024
Trading Symbol	JNJ
Security Exchange Name	NYSE
5.50% Notes Due November 2024
Document Information [Line Items]
Title of 12(b) Security	5.50% Notes Due November 2024
Trading Symbol	JNJ
Security Exchange Name	NYSE
1.150% Notes Due November 2028
Document Information [Line Items]
Title of 12(b) Security	1.150% Notes Due November 2028
Trading Symbol	JNJ
Security Exchange Name	NYSE
1.650% Notes Due May 2035
Document Information [Line Items]
Title of 12(b) Security	1.650% Notes Due May 2035
Trading Symbol	JNJ
Security Exchange Name	NYSE