Investor A C And Institutional [Member] Annual Total Returns |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
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 |
|
| Investor A, C and Institutional | BlackRock Systematic Multi-Strategy Fund | Investor A Shares | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | 6.61% | 6.19% | (3.23%) | 5.85% | 3.34% | 8.25% | 1.41% | 9.83% | 5.61% |