S000034097 [Member] Expense Example - Loomis Sayles Senior Floating Rate and Fixed Income Fund |
Nov. 30, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 447 |
| Expense Example, with Redemption, 3 Years | 671 |
| Expense Example, with Redemption, 5 Years | 912 |
| Expense Example, with Redemption, 10 Years | 1,603 |
| Class C | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 277 |
| Expense Example, with Redemption, 3 Years | 565 |
| Expense Example, with Redemption, 5 Years | 978 |
| Expense Example, with Redemption, 10 Years | 1,934 |
| Class Y | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 76 |
| Expense Example, with Redemption, 3 Years | 254 |
| Expense Example, with Redemption, 5 Years | 447 |
| Expense Example, with Redemption, 10 Years | 1,006 |
| Class N | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 70 |
| Expense Example, with Redemption, 3 Years | 238 |
| Expense Example, with Redemption, 5 Years | 420 |
| Expense Example, with Redemption, 10 Years | $ 947 |