v3.10.0.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 30, 2018
Feb. 15, 2019
Jul. 01, 2018
Document Information [Line Items]      
Entity Registrant Name JOHNSON & JOHNSON    
Entity Central Index Key 0000200406    
Current Fiscal Year End Date --12-30    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 30, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   2,663,138,579  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 325,000,000,000