S000051381 [Member] Expense Example - AMG River Road Focused Absolute Value Fund |
Oct. 31, 2025
USD ($)
|
|---|---|
| CLASS I SHARES | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 84 |
| Expense Example, with Redemption, 3 Years | 303 |
| Expense Example, with Redemption, 5 Years | 539 |
| Expense Example, with Redemption, 10 Years | 1,219 |
| CLASS N SHARES | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 108 |
| Expense Example, with Redemption, 3 Years | 378 |
| Expense Example, with Redemption, 5 Years | 668 |
| Expense Example, with Redemption, 10 Years | 1,495 |
| CLASS Z Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 80 |
| Expense Example, with Redemption, 3 Years | 290 |
| Expense Example, with Redemption, 5 Years | 518 |
| Expense Example, with Redemption, 10 Years | $ 1,172 |