Investor A C and Institutional [Member] Expense Example, No Redemption - Investor A, C and Institutional - BlackRock California Municipal Opportunities Fund - Investor C Shares |
May 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 150 |
| Expense Example, No Redemption, 3 Years | 467 |
| Expense Example, No Redemption, 5 Years | 807 |
| Expense Example, No Redemption, 10 Years | $ 1,559 |