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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MFS International Equity Fund | R6 | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 23.23% | 4.14% | 19.04% | (14.83%) | 15.16% | 11.10% | 28.40% | (10.66%) | 28.02% | 0.30% |