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DOCUMENT AND ENTITY INFORMATION Document (USD $)
In Billions, except Share data, unless otherwise specified
 8 Months Ended
Dec. 29, 2013
Mar. 18, 2014
Oct. 27, 2013
Entity Information [Line Items]      
Entity Registrant Name SMITHFIELD FOODS INC    
Entity Central Index Key 0000091388    
Current Fiscal Year End Date --12-29    
Entity Filer Category Non-accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 29, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   1,000  
Entity Current Reporting Status Yes    
Entity Voluntary Filers Yes    
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 0