| Cover Document | Jan. 30, 2020 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Jan. 30, 2020 |
| Entity Address, Street Name | 5401 Virginia Way |
| Entity Registrant Name | TRACTOR SUPPLY CO /DE/ |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-23314 |
| Entity Tax Identification Number | 13-3139732 |
| Entity Address, City | Brentwood |
| Entity Address, State | TN |
| Entity Address, Postal Zip Code | 37027 |
| City Area Code | 615) |
| Local Phone Number | 440-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Title of each class | Common Stock, $0.008 par value |
| Trading Symbol | TSCO |
| Name of each exchange on which registered | NASDAQ |
| Amendment Flag | false |
| Entity Central Index Key | 0000916365 |
