Expense Example, No Redemption - BlackRock U.S. Mortgage Portfolio - Investor C Shares |
Apr. 30, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 148 |
| Expense Example, No Redemption, 3 Years | 492 |
| Expense Example, No Redemption, 5 Years | 861 |
| Expense Example, No Redemption, 10 Years | $ 1,691 |