S000023781 [Member] Expense Example - AMG GW&K Municipal Enhanced Yield Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 65 |
| Expense Example, with Redemption, 3 Years | 229 |
| Expense Example, with Redemption, 5 Years | 406 |
| Expense Example, with Redemption, 10 Years | 920 |
| Class N | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 101 |
| Expense Example, with Redemption, 3 Years | 339 |
| Expense Example, with Redemption, 5 Years | 596 |
| Expense Example, with Redemption, 10 Years | 1,330 |
| Class Z | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 60 |
| Expense Example, with Redemption, 3 Years | 213 |
| Expense Example, with Redemption, 5 Years | 379 |
| Expense Example, with Redemption, 10 Years | $ 860 |