Investor A C and Institutional [Member] Expense Example - Investor A, C and Institutional - BlackRock Pennsylvania Municipal Bond Fund |
May 31, 2026
USD ($)
|
|---|---|
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 70 |
| Expense Example, with Redemption, 3 Years | 266 |
| Expense Example, with Redemption, 5 Years | 478 |
| Expense Example, with Redemption, 10 Years | 1,089 |
| Investor A Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 517 |
| Expense Example, with Redemption, 3 Years | 734 |
| Expense Example, with Redemption, 5 Years | 970 |
| Expense Example, with Redemption, 10 Years | 1,644 |
| Investor C Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 272 |
| Expense Example, with Redemption, 3 Years | 570 |
| Expense Example, with Redemption, 5 Years | 994 |
| Expense Example, with Redemption, 10 Years | $ 1,961 |