S000042178 [Member] Annual Total Returns - BARON DISCOVERY FUND |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Prospectus [Line Items] | |||||||||||
| Annual Return Caption [Text] | Average Annual Total Returns for the periods ended December 31, 2025 | ||||||||||
| BARON DISCOVERY FUND | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Annual Return [Percent] | 10.69% | 15.95% | 22.28% | (35.30%) | 4.63% | 65.71% | 26.46% | 0.42% | 35.52% | 21.40% | |