Investor A C Institutional and Class R [Member] Expense Example, No Redemption - Investor A, C, Institutional and Class R - BlackRock LifePath Dynamic 2070 Fund - Investor C |
Dec. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 162 |
| Expense Example, No Redemption, 3 Years | 548 |
| Expense Example, No Redemption, 5 Years | 960 |
| Expense Example, No Redemption, 10 Years | $ 1,911 |