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Document And Entity Information (USD $)
 12 Months Ended
Dec. 29, 2012
Jan. 26, 2013
Jun. 29, 2012
Entity Information [Line Items]      
Entity Registrant Name TRACTOR SUPPLY CO /DE/    
Entity Central Index Key 0000916365    
Current Fiscal Year End Date --12-29    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 5,800,000,000
Entity Common Stock, Shares Outstanding   69,208,915  
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 29, 2012