Investor A, Institutional [Member] Expense Example - Investor A, Institutional - BLACKROCK LIFEPATH INDEX 2030 FUND |
Dec. 31, 2025
USD ($)
|
|---|---|
| Investor A | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 40 |
| Expense Example, with Redemption, 3 Years | 132 |
| Expense Example, with Redemption, 5 Years | 232 |
| Expense Example, with Redemption, 10 Years | 527 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 14 |
| Expense Example, with Redemption, 3 Years | 52 |
| Expense Example, with Redemption, 5 Years | 93 |
| Expense Example, with Redemption, 10 Years | $ 214 |