Shareholder Report, Holdings (Details)
|
May 31, 2025 |
| C000001874 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000001874 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000001874 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
42.50%
|
| C000001874 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000001874 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.70%
|
| C000001874 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.90%
|
| C000001874 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.20%
|
| C000001874 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000001874 [Member] | Short term investments Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000001874 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000001874 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.00%
|
| C000001874 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.20%
|
| C000001874 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.10%
|
| C000001874 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.90%
|
| C000001874 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000001874 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.40%
|
| C000001874 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000001874 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000001874 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.10%
|
| C000001874 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000001874 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000001874 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
87.60%
|
| C000001874 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.30%
|
| C000001874 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000001874 [Member] | Short-Term Investments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000001876 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000001876 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000001876 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
42.50%
|
| C000001876 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000001876 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.70%
|
| C000001876 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.90%
|
| C000001876 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.20%
|
| C000001876 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000001876 [Member] | Short term investments Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000001876 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000001876 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.00%
|
| C000001876 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.20%
|
| C000001876 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.10%
|
| C000001876 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.90%
|
| C000001876 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000001876 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.40%
|
| C000001876 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000001876 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000001876 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.10%
|
| C000001876 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000001876 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000001876 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
87.60%
|
| C000001876 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.30%
|
| C000001876 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000001876 [Member] | Short-Term Investments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000193018 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000193018 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000193018 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
42.50%
|
| C000193018 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000193018 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.70%
|
| C000193018 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.90%
|
| C000193018 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.20%
|
| C000193018 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000193018 [Member] | Short term investments Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000193018 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000193018 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.00%
|
| C000193018 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.20%
|
| C000193018 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.10%
|
| C000193018 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.90%
|
| C000193018 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000193018 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.40%
|
| C000193018 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000193018 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000193018 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.10%
|
| C000193018 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000193018 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000193018 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
87.60%
|
| C000193018 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.30%
|
| C000193018 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000193018 [Member] | Short-Term Investments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000178765 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.70%
|
| C000178765 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000178765 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
42.50%
|
| C000178765 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000178765 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
9.70%
|
| C000178765 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
15.90%
|
| C000178765 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.20%
|
| C000178765 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.80%
|
| C000178765 [Member] | Short term investments Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000178765 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
20.20%
|
| C000178765 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.00%
|
| C000178765 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.20%
|
| C000178765 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.10%
|
| C000178765 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
8.90%
|
| C000178765 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
16.60%
|
| C000178765 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
3.40%
|
| C000178765 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.40%
|
| C000178765 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.10%
|
| C000178765 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
6.10%
|
| C000178765 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
1.20%
|
| C000178765 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.60%
|
| C000178765 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
87.60%
|
| C000178765 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
11.30%
|
| C000178765 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
10.40%
|
| C000178765 [Member] | Short-Term Investments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Total Investments |
0.50%
|
| C000001877 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| C000001877 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.30%
|
| C000001877 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000001877 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.70%
|
| C000001877 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
7.70%
|
| C000001877 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.30%
|
| C000001877 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
34.70%
|
| C000001877 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001877 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
19.80%
|
| C000001877 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.10%
|
| C000001877 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000001877 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.10%
|
| C000001877 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.20%
|
| C000001877 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.40%
|
| C000001877 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.20%
|
| C000001877 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| C000001877 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| C000001877 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.60%
|
| C000001877 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001877 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001877 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.20%
|
| C000001877 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000001877 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.70%
|
| C000001877 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001877 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000001877 [Member] | Closed end funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000193019 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| C000193019 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.30%
|
| C000193019 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000193019 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.70%
|
| C000193019 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
7.70%
|
| C000193019 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.30%
|
| C000193019 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
34.70%
|
| C000193019 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000193019 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
19.80%
|
| C000193019 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.10%
|
| C000193019 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000193019 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.10%
|
| C000193019 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.20%
|
| C000193019 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.40%
|
| C000193019 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.20%
|
| C000193019 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| C000193019 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| C000193019 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.60%
|
| C000193019 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000193019 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000193019 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.20%
|
| C000193019 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000193019 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.70%
|
| C000193019 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000193019 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000193019 [Member] | Closed end funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000178766 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| C000178766 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.30%
|
| C000178766 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000178766 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.70%
|
| C000178766 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
7.70%
|
| C000178766 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.30%
|
| C000178766 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
34.70%
|
| C000178766 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000178766 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
19.80%
|
| C000178766 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.10%
|
| C000178766 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000178766 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.10%
|
| C000178766 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.20%
|
| C000178766 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.40%
|
| C000178766 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.20%
|
| C000178766 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| C000178766 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| C000178766 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.60%
|
| C000178766 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000178766 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000178766 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.20%
|
| C000178766 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000178766 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.70%
|
| C000178766 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000178766 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000178766 [Member] | Closed end funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000001879 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| C000001879 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.30%
|
| C000001879 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000001879 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.70%
|
| C000001879 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
7.70%
|
| C000001879 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.30%
|
| C000001879 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
34.70%
|
| C000001879 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001879 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
19.80%
|
| C000001879 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.10%
|
| C000001879 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000001879 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
9.10%
|
| C000001879 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.20%
|
| C000001879 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.40%
|
| C000001879 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.20%
|
| C000001879 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| C000001879 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| C000001879 [Member] | Tobacco [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.60%
|
| C000001879 [Member] | Facilities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001879 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001879 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.20%
|
| C000001879 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.00%
|
| C000001879 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.70%
|
| C000001879 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| C000001879 [Member] | Equity [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000001879 [Member] | Closed end funds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236446 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.80%
|
| C000236446 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.90%
|
| C000236446 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.30%
|
| C000236446 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236446 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.80%
|
| C000236446 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| C000236446 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.60%
|
| C000236446 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
38.90%
|
| C000236446 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236446 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.80%
|
| C000236446 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| C000236446 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.30%
|
| C000236446 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.10%
|
| C000236446 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236446 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.10%
|
| C000236446 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| C000236446 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000236446 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.50%
|
| C000236446 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236446 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.30%
|
| C000236446 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.30%
|
| C000236446 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
21.30%
|
| C000236446 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236447 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.80%
|
| C000236447 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.90%
|
| C000236447 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.30%
|
| C000236447 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236447 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.80%
|
| C000236447 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| C000236447 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.60%
|
| C000236447 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
38.90%
|
| C000236447 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236447 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.80%
|
| C000236447 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| C000236447 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.30%
|
| C000236447 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.10%
|
| C000236447 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236447 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.10%
|
| C000236447 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| C000236447 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000236447 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.50%
|
| C000236447 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236447 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.30%
|
| C000236447 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.30%
|
| C000236447 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
21.30%
|
| C000236447 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236448 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.80%
|
| C000236448 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.90%
|
| C000236448 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.30%
|
| C000236448 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236448 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.80%
|
| C000236448 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| C000236448 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.60%
|
| C000236448 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
38.90%
|
| C000236448 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236448 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.80%
|
| C000236448 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| C000236448 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.30%
|
| C000236448 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.10%
|
| C000236448 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236448 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.10%
|
| C000236448 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| C000236448 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000236448 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.50%
|
| C000236448 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236448 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.30%
|
| C000236448 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.30%
|
| C000236448 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
21.30%
|
| C000236448 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236445 [Member] | CCC and below [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.80%
|
| C000236445 [Member] | Moody's, Aaa Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.90%
|
| C000236445 [Member] | Not rated [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.30%
|
| C000236445 [Member] | Standard & Poor's, BBB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236445 [Member] | Standard & Poor's, AA Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
23.80%
|
| C000236445 [Member] | Standard & Poor's, BB Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| C000236445 [Member] | Standard & Poor's, B Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.60%
|
| C000236445 [Member] | Standard & Poor's, A Rating [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
38.90%
|
| C000236445 [Member] | Short term investments and other Quality [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236445 [Member] | Healthcare Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.80%
|
| C000236445 [Member] | Transportation Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| C000236445 [Member] | Utilities Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.30%
|
| C000236445 [Member] | Development [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
12.10%
|
| C000236445 [Member] | Airport [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
11.90%
|
| C000236445 [Member] | Education [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.10%
|
| C000236445 [Member] | Housing [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| C000236445 [Member] | Water and sewer [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.60%
|
| C000236445 [Member] | Pollution [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.50%
|
| C000236445 [Member] | Corporate Bond Securities [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|
| C000236445 [Member] | Revenue bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
85.30%
|
| C000236445 [Member] | General obligation bonds [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
14.30%
|
| C000236445 [Member] | Other revenue [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
21.30%
|
| C000236445 [Member] | Short term investments and other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.20%
|