Annual Fund Operating Expenses - AMG GW&K Small Cap Growth Fund |
Apr. 30, 2025 |
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|---|---|---|---|---|---|---|
| Prospectus [Line Items] | ||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | March 1, 2027 | |||||
| CLASS N | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.47% | |||||
| Distribution and Service (12b-1) Fees | 0.15% | |||||
| Other Expenses (as a percentage of Assets): | 0.34% | |||||
| Expenses (as a percentage of Assets) | 0.96% | |||||
| Fee Waiver or Reimbursement | (0.06%) | [1] | ||||
| Net Expenses (as a percentage of Assets) | 0.90% | [1] | ||||
| CLASS I | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.47% | |||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||
| Other Expenses (as a percentage of Assets): | 0.32% | |||||
| Expenses (as a percentage of Assets) | 0.79% | |||||
| Fee Waiver or Reimbursement | (0.06%) | [1] | ||||
| Net Expenses (as a percentage of Assets) | 0.73% | [1] | ||||
| Class Z | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.47% | [2] | ||||
| Distribution and Service (12b-1) Fees | 0.00% | [2] | ||||
| Other Expenses (as a percentage of Assets): | 0.26% | [2] | ||||
| Expenses (as a percentage of Assets) | 0.73% | [2] | ||||
| Fee Waiver or Reimbursement | (0.06%) | [1],[2] | ||||
| Net Expenses (as a percentage of Assets) | 0.67% | [1],[2] | ||||
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