v3.25.4
S000042178 [Member] Expense Example - BARON DISCOVERY FUND
Sep. 30, 2025
USD ($)
BARON DISCOVERY FUND  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 135
Expense Example, with Redemption, 3 Years 421
Expense Example, with Redemption, 5 Years 729
Expense Example, with Redemption, 10 Years 1,601
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 107
Expense Example, with Redemption, 3 Years 334
Expense Example, with Redemption, 5 Years 579
Expense Example, with Redemption, 10 Years $ 1,283