v3.19.3.a.u2
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