S000000583 [Member] Annual Total Returns - BARON GROWTH 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 GROWTH FUND | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Annual Return [Percent] | (14.41%) | 4.76% | 14.68% | (22.60%) | 19.84% | 32.72% | 40.14% | (2.92%) | 27.04% | 6.04% | |