S000000588 [Member] Expense Example - Baron Partners Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Retail Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 194 |
| Expense Example, with Redemption, 3 Years | 600 |
| Expense Example, with Redemption, 5 Years | 1,032 |
| Expense Example, with Redemption, 10 Years | 2,233 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 168 |
| Expense Example, with Redemption, 3 Years | 520 |
| Expense Example, with Redemption, 5 Years | 897 |
| Expense Example, with Redemption, 10 Years | 1,955 |
| R6 Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 168 |
| Expense Example, with Redemption, 3 Years | 520 |
| Expense Example, with Redemption, 5 Years | 897 |
| Expense Example, with Redemption, 10 Years | $ 1,955 |