| Document and Entity Information Document | Oct. 29, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2020 |
| Entity Registrant Name | KONTOOR BRANDS, INC. |
| Entity Central Index Key | 0001760965 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | NC |
| Entity File Number | 001-38854 |
| Entity Tax Identification Number | 83-2680248 |
| Entity Address, Address Line One | 400 N. Elm Street |
| Entity Address, City or Town | Greensboro |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 27401 |
| City Area Code | (336) |
| Local Phone Number | 332-3400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Tender Offer | false |
| Title of 12(b) Security | Common Stock, no par value |
| Trading Symbol | KTB |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Document Information [Line Items] | |
| Document Period End Date | Oct. 29, 2020 |
