Annual Total Returns |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|---|---|---|---|---|---|---|
| Eaton Vance VT Floating-Rate Income Fund | Eaton Vance VT Floating-Rate Income Fund | Initial | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 3.95% | 7.68% | 11.21% | (2.74%) | 3.63% | 2.00% | 7.08% | (0.07%) | 3.44% | 8.95% |