S000001129 [Member] Expense Example - AMG River Road Dividend All Cap Value Fund |
Oct. 31, 2025
USD ($)
|
|---|---|
| CLASS N SHARES | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 99 |
| Expense Example, with Redemption, 3 Years | 339 |
| Expense Example, with Redemption, 5 Years | 598 |
| Expense Example, with Redemption, 10 Years | 1,339 |
| CLASS I SHARES | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 74 |
| Expense Example, with Redemption, 3 Years | 260 |
| Expense Example, with Redemption, 5 Years | 463 |
| Expense Example, with Redemption, 10 Years | 1,048 |
| Class Z Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 69 |
| Expense Example, with Redemption, 3 Years | 248 |
| Expense Example, with Redemption, 5 Years | 441 |
| Expense Example, with Redemption, 10 Years | $ 1,001 |