v3.26.3
Shareholder Report, Holdings (Details)
Jul. 31, 2026
C000013069 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 32.30%
C000013069 | B  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000013069 | BB  
Holdings [Line Items]  
Percent of Total Investments 19.10%
C000013069 | BBB  
Holdings [Line Items]  
Percent of Total Investments 21.80%
C000013069 | A  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000013069 | AA  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000013069 | AAA  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000013069 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000013069 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000013069 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000013069 | Housing  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000013069 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000013069 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 9.00%
C000013069 | Education  
Holdings [Line Items]  
Percent of Total Investments 9.30%
C000013069 | Industrial Development Revenue  
Holdings [Line Items]  
Percent of Total Investments 10.90%
C000013069 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000013069 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 15.10%
C000013069 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 19.00%
C000013071 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 32.30%
C000013071 | B  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000013071 | BB  
Holdings [Line Items]  
Percent of Total Investments 19.10%
C000013071 | BBB  
Holdings [Line Items]  
Percent of Total Investments 21.80%
C000013071 | A  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000013071 | AA  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000013071 | AAA  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000013071 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000013071 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000013071 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000013071 | Housing  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000013071 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000013071 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 9.00%
C000013071 | Education  
Holdings [Line Items]  
Percent of Total Investments 9.30%
C000013071 | Industrial Development Revenue  
Holdings [Line Items]  
Percent of Total Investments 10.90%
C000013071 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000013071 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 15.10%
C000013071 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 19.00%
C000048637 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 32.30%
C000048637 | B  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000048637 | BB  
Holdings [Line Items]  
Percent of Total Investments 19.10%
C000048637 | BBB  
Holdings [Line Items]  
Percent of Total Investments 21.80%
C000048637 | A  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000048637 | AA  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000048637 | AAA  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000048637 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000048637 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000048637 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000048637 | Housing  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000048637 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000048637 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 9.00%
C000048637 | Education  
Holdings [Line Items]  
Percent of Total Investments 9.30%
C000048637 | Industrial Development Revenue  
Holdings [Line Items]  
Percent of Total Investments 10.90%
C000048637 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000048637 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 15.10%
C000048637 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 19.00%
C000231374 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 32.30%
C000231374 | B  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000231374 | BB  
Holdings [Line Items]  
Percent of Total Investments 19.10%
C000231374 | BBB  
Holdings [Line Items]  
Percent of Total Investments 21.80%
C000231374 | A  
Holdings [Line Items]  
Percent of Total Investments 7.60%
C000231374 | AA  
Holdings [Line Items]  
Percent of Total Investments 12.90%
C000231374 | AAA  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000231374 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000231374 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000231374 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000231374 | Housing  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000231374 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000231374 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 9.00%
C000231374 | Education  
Holdings [Line Items]  
Percent of Total Investments 9.30%
C000231374 | Industrial Development Revenue  
Holdings [Line Items]  
Percent of Total Investments 10.90%
C000231374 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 13.50%
C000231374 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 15.10%
C000231374 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 19.00%
C000154967 | BBB  
Holdings [Line Items]  
Percent of Total Investments 11.10%
C000154967 | A  
Holdings [Line Items]  
Percent of Total Investments 17.60%
C000154967 | AA  
Holdings [Line Items]  
Percent of Total Investments 45.40%
C000154967 | AAA  
Holdings [Line Items]  
Percent of Total Investments 25.90%
C000154967 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000154967 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000154967 | Housing  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000154967 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 17.00%
C000154967 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 24.50%
C000154967 | Education  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000154967 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000154967 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000154967 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000154967 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000154968 | BBB  
Holdings [Line Items]  
Percent of Total Investments 11.10%
C000154968 | A  
Holdings [Line Items]  
Percent of Total Investments 17.60%
C000154968 | AA  
Holdings [Line Items]  
Percent of Total Investments 45.40%
C000154968 | AAA  
Holdings [Line Items]  
Percent of Total Investments 25.90%
C000154968 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000154968 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000154968 | Housing  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000154968 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 17.00%
C000154968 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 24.50%
C000154968 | Education  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000154968 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000154968 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000154968 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000154968 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000154969 | BBB  
Holdings [Line Items]  
Percent of Total Investments 11.10%
C000154969 | A  
Holdings [Line Items]  
Percent of Total Investments 17.60%
C000154969 | AA  
Holdings [Line Items]  
Percent of Total Investments 45.40%
C000154969 | AAA  
Holdings [Line Items]  
Percent of Total Investments 25.90%
C000154969 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000154969 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 8.30%
C000154969 | Housing  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000154969 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 17.00%
C000154969 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 24.50%
C000154969 | Education  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000154969 | Senior Living/Life Care  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000154969 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000154969 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 6.90%
C000154969 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000081348 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000081348 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000081348 | A  
Holdings [Line Items]  
Percent of Total Investments 14.20%
C000081348 | AA  
Holdings [Line Items]  
Percent of Total Investments 44.00%
C000081348 | AAA  
Holdings [Line Items]  
Percent of Total Investments 38.30%
C000081348 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000081348 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000081348 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000081348 | Housing  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000081348 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000081348 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 42.80%
C000081348 | Education  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000081348 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000081348 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000081348 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000081348 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000081349 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000081349 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000081349 | A  
Holdings [Line Items]  
Percent of Total Investments 14.20%
C000081349 | AA  
Holdings [Line Items]  
Percent of Total Investments 44.00%
C000081349 | AAA  
Holdings [Line Items]  
Percent of Total Investments 38.30%
C000081349 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000081349 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000081349 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000081349 | Housing  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000081349 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000081349 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 42.80%
C000081349 | Education  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000081349 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000081349 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000081349 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000081349 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000081350 | Not Rated  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000081350 | BBB  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000081350 | A  
Holdings [Line Items]  
Percent of Total Investments 14.20%
C000081350 | AA  
Holdings [Line Items]  
Percent of Total Investments 44.00%
C000081350 | AAA  
Holdings [Line Items]  
Percent of Total Investments 38.30%
C000081350 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000081350 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 7.40%
C000081350 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000081350 | Housing  
Holdings [Line Items]  
Percent of Total Investments 8.40%
C000081350 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000081350 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 42.80%
C000081350 | Education  
Holdings [Line Items]  
Percent of Total Investments 6.50%
C000081350 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 6.30%
C000081350 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 6.10%
C000081350 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000081350 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000081345 | BBB  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000081345 | A  
Holdings [Line Items]  
Percent of Total Investments 12.10%
C000081345 | AA  
Holdings [Line Items]  
Percent of Total Investments 60.80%
C000081345 | AAA  
Holdings [Line Items]  
Percent of Total Investments 25.20%
C000081345 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000081345 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 8.50%
C000081345 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000081345 | Housing  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000081345 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 28.90%
C000081345 | Education  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000081345 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000081345 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 12.60%
C000081345 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000081345 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 12.00%
C000081345 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000081346 | BBB  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000081346 | A  
Holdings [Line Items]  
Percent of Total Investments 12.10%
C000081346 | AA  
Holdings [Line Items]  
Percent of Total Investments 60.80%
C000081346 | AAA  
Holdings [Line Items]  
Percent of Total Investments 25.20%
C000081346 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000081346 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 8.50%
C000081346 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000081346 | Housing  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000081346 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 28.90%
C000081346 | Education  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000081346 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000081346 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 12.60%
C000081346 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000081346 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 12.00%
C000081346 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000081347 | BBB  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000081347 | A  
Holdings [Line Items]  
Percent of Total Investments 12.10%
C000081347 | AA  
Holdings [Line Items]  
Percent of Total Investments 60.80%
C000081347 | AAA  
Holdings [Line Items]  
Percent of Total Investments 25.20%
C000081347 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000081347 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 8.50%
C000081347 | Lease Rev./Cert. of Participation  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000081347 | Housing  
Holdings [Line Items]  
Percent of Total Investments 7.20%
C000081347 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 28.90%
C000081347 | Education  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000081347 | Transportation  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000081347 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 12.60%
C000081347 | Electric Utilities  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000081347 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 12.00%
C000081347 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000074079 | BBB  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074079 | A  
Holdings [Line Items]  
Percent of Total Investments 12.30%
C000074079 | AA  
Holdings [Line Items]  
Percent of Total Investments 46.00%
C000074079 | AAA  
Holdings [Line Items]  
Percent of Total Investments 38.30%
C000074079 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000074079 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 13.10%
C000074079 | Housing  
Holdings [Line Items]  
Percent of Total Investments 13.60%
C000074079 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000074079 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 37.50%
C000074079 | Education  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000074079 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074079 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 5.80%
C000074079 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000074080 | BBB  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074080 | A  
Holdings [Line Items]  
Percent of Total Investments 12.30%
C000074080 | AA  
Holdings [Line Items]  
Percent of Total Investments 46.00%
C000074080 | AAA  
Holdings [Line Items]  
Percent of Total Investments 38.30%
C000074080 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000074080 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 13.10%
C000074080 | Housing  
Holdings [Line Items]  
Percent of Total Investments 13.60%
C000074080 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000074080 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 37.50%
C000074080 | Education  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000074080 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074080 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 5.80%
C000074080 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000074081 | BBB  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074081 | A  
Holdings [Line Items]  
Percent of Total Investments 12.30%
C000074081 | AA  
Holdings [Line Items]  
Percent of Total Investments 46.00%
C000074081 | AAA  
Holdings [Line Items]  
Percent of Total Investments 38.30%
C000074081 | Industry Other Line  
Holdings [Line Items]  
Percent of Total Investments 8.20%
C000074081 | Other Revenue  
Holdings [Line Items]  
Percent of Total Investments 13.10%
C000074081 | Housing  
Holdings [Line Items]  
Percent of Total Investments 13.60%
C000074081 | Hospital  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000074081 | General Obligations  
Holdings [Line Items]  
Percent of Total Investments 37.50%
C000074081 | Education  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000074081 | Special Tax Revenue  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074081 | Water and Sewer  
Holdings [Line Items]  
Percent of Total Investments 5.80%
C000074081 | Short-Term Investments  
Holdings [Line Items]  
Percent of Total Investments 5.10%