Annual Total Returns - Class A |
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 National Ultra-Short Municipal Income Fund | Eaton Vance National Ultra-Short Municipal Income Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 3.03% | 3.22% | 3.27% | (0.01%) | 0.43% | 0.01% | 1.68% | 1.48% | 1.10% | 0.60% |
| Eaton Vance National Limited Maturity Municipal Income Fund | Eaton Vance National Limited Maturity Municipal Income Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.13% | 2.79% | 4.05% | (4.16%) | 0.60% | 3.24% | 4.79% | 0.95% | 3.76% | (0.50%) |
| Eaton Vance Short Duration Municipal Opportunities Fund | Eaton Vance Short Duration Municipal Opportunities Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.81% | 3.90% | 4.30% | (5.13%) | 1.74% | 2.18% | 4.55% | 2.18% | 4.66% | (0.01%) |