S000000585 [Member] Expense Example - BARON OPPORTUNITY FUND |
Sep. 30, 2025
USD ($)
|
|---|---|
| BARON OPPORTUNITY FUND | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 133 |
| Expense Example, with Redemption, 3 Years | 415 |
| Expense Example, with Redemption, 5 Years | 718 |
| Expense Example, with Redemption, 10 Years | 1,579 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 107 |
| Expense Example, with Redemption, 3 Years | 334 |
| Expense Example, with Redemption, 5 Years | 579 |
| Expense Example, with Redemption, 10 Years | 1,283 |
| R6 Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 106 |
| Expense Example, with Redemption, 3 Years | 331 |
| Expense Example, with Redemption, 5 Years | 574 |
| Expense Example, with Redemption, 10 Years | $ 1,271 |