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DOCUMENT AND ENTITY INFORMATION - shares
 9 Months Ended
Sep. 27, 2015
Oct. 28, 2015
Entity Information [Line Items]    
Entity Registrant Name SMITHFIELD FOODS INC  
Entity Central Index Key 0000091388  
Current Fiscal Year End Date --01-03  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 27, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   1,000
Entity Current Reporting Status Yes  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers Yes