| N-2 | Sep. 27, 2022 |
| Cover [Abstract] | |
| Entity Central Index Key | 0001288992 |
| Amendment Flag | false |
| Document Type | POS EX |
| Entity Registrant Name | EATON VANCE FLOATING-RATE INCOME TRUST |
| Entity Address, Address Line One | Two International Place |
| Entity Address, City or Town | Boston |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02110 |
| City Area Code | (617) |
| Local Phone Number | 482-8260 |
| No Substantive Changes, 462(c) | false |
| Exhibits Only, 462(d) | true |
| Entity Well-known Seasoned Issuer | No |
| Entity Emerging Growth Company | false |
| Business Contact [Member] | |
| Cover [Abstract] | |
| Entity Address, Address Line One | Two International Place |
| Entity Address, City or Town | Boston |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02110 |
| Contact Personnel Name | Deidre E. Walsh |
