| Document and Entity Information | Nov. 30, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | TJX COMPANIES INC /DE/ |
| Entity Incorporation State Country Code | DE |
| Amendment Flag | false |
| Entity Central Index Key | 0000109198 |
| Document Type | 8-K |
| Document Period End Date | Nov. 30, 2020 |
| Entity File Number | 1-4908 |
| Entity Tax Identification Number | 04-2207613 |
| Entity Address, Address Line One | 770 Cochituate Road |
| Entity Address, City or Town | Framingham |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01701 |
| City Area Code | (508) |
| Local Phone Number | 390-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $1.00 per share |
| Trading Symbol | TJX |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
