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 |
|
| Investor A, Institutional | BlackRock LifePath Index 2060 Fund | Investor A | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | 21.37% | 15.94% | 21.30% | (18.58%) | 18.50% | 14.71% | 26.46% | (8.04%) | 21.06% |