S000001256 [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
|
| HIGH YIELD FIXED INCOME FUND | HIGH YIELD FIXED INCOME FUND | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 8.74% | 8.04% | 13.83% | (11.64%) | 5.44% | 6.02% | 15.89% | (3.79%) | 7.58% | 11.23% |