Investor A, Institutional [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
|
| Investor A, Institutional | BLACKROCK LIFEPATH INDEX 2035 FUND | Investor A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 15.70% | 10.63% | 16.26% | (17.27%) | 13.46% | 13.34% | 22.77% | (6.59%) | 17.89% | 7.36% |