v3.26.1
S000009865 [Member] Expense Example - AMG Veritas Asia Pacific Fund
Dec. 31, 2025
USD ($)
Class N  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 119
Expense Example, with Redemption, 3 Years 408
Expense Example, with Redemption, 5 Years 718
Expense Example, with Redemption, 10 Years 1,598
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 95
Expense Example, with Redemption, 3 Years 333
Expense Example, with Redemption, 5 Years 590
Expense Example, with Redemption, 10 Years $ 1,325