Expense Example, No Redemption - Classes ACS [Member] - DWS Massachusetts Tax-Free Fund |
Mar. 31, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 361 |
| Expense Example, No Redemption, 3 Years | 564 |
| Expense Example, No Redemption, 5 Years | 783 |
| Expense Example, No Redemption, 10 Years | 1,413 |
| Class C | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 165 |
| Expense Example, No Redemption, 3 Years | 543 |
| Expense Example, No Redemption, 5 Years | 945 |
| Expense Example, No Redemption, 10 Years | 1,858 |
| INST Class | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 63 |
| Expense Example, No Redemption, 3 Years | 227 |
| Expense Example, No Redemption, 5 Years | 404 |
| Expense Example, No Redemption, 10 Years | 918 |
| Class S | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 63 |
| Expense Example, No Redemption, 3 Years | 231 |
| Expense Example, No Redemption, 5 Years | 413 |
| Expense Example, No Redemption, 10 Years | $ 940 |