S000000584 [Member] Annual Fund Operating Expenses - BARON SMALL CAP FUND |
Sep. 30, 2025 |
|---|---|
| BARON SMALL CAP FUND | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 1.00% |
| Distribution and Service (12b-1) Fees | 0.25% |
| Other Expenses (as a percentage of Assets): | 0.07% |
| Expenses (as a percentage of Assets) | 1.32% |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 1.00% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.06% |
| Expenses (as a percentage of Assets) | 1.06% |
| R6 Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 1.00% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.06% |
| Expenses (as a percentage of Assets) | 1.06% |