Investor P [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 P | BLACKROCK LIFEPATH INDEX 2045 FUND | Investor P Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 18.74% | 13.98% | 20.00% | (18.33%) | 17.44% | 14.34% | 25.91% | (7.85%) | 20.73% | 7.96% |