S000000588 [Member] Annual Fund Operating Expenses - Baron Partners Fund |
Dec. 31, 2025 |
|---|---|
| Retail Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 1.00% |
| Distribution and Service (12b-1) Fees | 0.25% |
| Component1 Other Expenses | 0.05% |
| Component2 Other Expenses | 0.61% |
| Other Expenses (as a percentage of Assets): | 0.66% |
| Expenses (as a percentage of Assets) | 1.91% |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 1.00% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Component1 Other Expenses | 0.04% |
| Component2 Other Expenses | 0.61% |
| Other Expenses (as a percentage of Assets): | 0.65% |
| Expenses (as a percentage of Assets) | 1.65% |
| R6 Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 1.00% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Component1 Other Expenses | 0.04% |
| Component2 Other Expenses | 0.61% |
| Other Expenses (as a percentage of Assets): | 0.65% |
| Expenses (as a percentage of Assets) | 1.65% |