S000025839 [Member] Expense Example - AMG Renaissance Large Cap Growth Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class Z | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 67 |
| Expense Example, with Redemption, 3 Years | 235 |
| Expense Example, with Redemption, 5 Years | 417 |
| Expense Example, with Redemption, 10 Years | 944 |
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 75 |
| Expense Example, with Redemption, 3 Years | 257 |
| Expense Example, with Redemption, 5 Years | 455 |
| Expense Example, with Redemption, 10 Years | 1,027 |
| Class N | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 102 |
| Expense Example, with Redemption, 3 Years | 342 |
| Expense Example, with Redemption, 5 Years | 601 |
| Expense Example, with Redemption, 10 Years | $ 1,342 |