S000039569 [Member] Expense Example - AMG TimesSquare International Small Cap Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class Z | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 107 |
| Expense Example, with Redemption, 3 Years | 345 |
| Expense Example, with Redemption, 5 Years | 601 |
| Expense Example, with Redemption, 10 Years | 1,336 |
| Class N | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 132 |
| Expense Example, with Redemption, 3 Years | 423 |
| Expense Example, with Redemption, 5 Years | 735 |
| Expense Example, with Redemption, 10 Years | 1,620 |
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 112 |
| Expense Example, with Redemption, 3 Years | 360 |
| Expense Example, with Redemption, 5 Years | 628 |
| Expense Example, with Redemption, 10 Years | $ 1,393 |