S000034097 [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 |
|
| Loomis Sayles Senior Floating Rate and Fixed Income Fund | Class Y | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 5.38% | 8.58% | 12.29% | (4.69%) | 4.86% | 1.42% | 5.41% | 0.39% | 5.06% | 11.51% |