S000001589 [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 |
|
| Strategic Bond Fund | Class S | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.51% | 0.84% | 4.38% | (14.23%) | (1.73%) | 8.88% | 9.47% | (0.76%) | 4.08% | 3.23% |