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Cover
 9 Months Ended
Sep. 26, 2020
shares
Cover [Abstract]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Sep. 26, 2020
Document Transition Report false
Entity File Number 000-23314
Entity Registrant Name TRACTOR SUPPLY CO /DE/
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 13-3139732
Entity Address, Street Address 5401 Virginia Way
Entity Address, City Brentwood
Entity Address, State TN
Entity Address, Postal Zip Code 37027
City Area Code 615
Local Phone Number 440-4000
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Title of each class Common Stock, $0.008 par value
Trading Symbol TSCO
Name of each exchange on which registered NASDAQ
Entity Central Index Key 0000916365
Entity Common Stock, Shares Outstanding 116,497,394
Current Fiscal Year End Date --12-26
Document Fiscal Year Focus 2020
Document Fiscal Period Focus Q3
Amendment Flag false