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DOCUMENT AND ENTITY INFORMATION
 3 Months Ended
Mar. 30, 2014
May 09, 2014
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-Q  
Document Period End Date Mar. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   1,000