S000037565 [Member] Annual Fund Operating Expenses - AMG Yacktman Focused Fund |
Dec. 31, 2025 |
|---|---|
| Class N | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.87% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.38% |
| Expenses (as a percentage of Assets) | 1.25% |
| Class I | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.87% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.19% |
| Expenses (as a percentage of Assets) | 1.06% |