Class N [Member] Performance Management |
Dec. 31, 2025 |
|---|---|
| Class N and Class Z | AMG Yacktman Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Performance |
| Performance Narrative [Text Block] | Because Class N shares of each Fund and Class Z shares of AMG Yacktman Fund have not commenced operations, the classes have no performance history.
|
| Performance One Year or Less [Text] | Because Class N shares of each Fund and Class Z shares of AMG Yacktman Fund have not commenced operations, the classes have no performance history. |
| Class N [Member] | AMG Yacktman Special Opportunities Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Performance |
| Performance Narrative [Text Block] | Because Class N shares of each Fund and Class Z shares of AMG Yacktman Fund have not commenced operations, the classes have no performance history.
|
| Performance One Year or Less [Text] | Because Class N shares of each Fund and Class Z shares of AMG Yacktman Fund have not commenced operations, the classes have no performance history. |