v3.26.1
Shareholder Report, Holdings (Details)
May 31, 2026
C000190788 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000190788 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000190788 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000190788 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000190788 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 60.30%
C000190788 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000190788 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
C000190788 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 67.90%
C000026165 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000026165 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000026165 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000026165 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000026165 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 60.30%
C000026165 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000026165 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
C000026165 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 67.90%
C000026164 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000026164 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000026164 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000026164 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000026164 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 60.30%
C000026164 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
C000026164 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
C000026164 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 67.90%
C000157044 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000157044 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000157044 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000157044 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000157044 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000157044 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000157044 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000157044 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000026110 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000026110 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000026110 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000026110 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000026110 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000026110 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000026110 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000026110 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000157041 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000157041 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000157041 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000157041 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000157041 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000157041 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000157041 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000157041 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000157042 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000157042 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000157042 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000157042 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000157042 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000157042 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000157042 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000157042 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000157043 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000157043 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000157043 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000157043 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000157043 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000157043 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000157043 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000157043 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000026109 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000026109 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000026109 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000026109 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000026109 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000026109 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000026109 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000026109 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%
C000026108 | 181 Days or More  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000026108 | 91-180 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000026108 | 31-90 Days  
Holdings [Line Items]  
Percent of Net Asset Value 24.40%
C000026108 | 8-30 Days  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000026108 | 1-7 Days  
Holdings [Line Items]  
Percent of Net Asset Value 61.20%
C000026108 | Commerical Paper  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000026108 | Municipal Notes  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
C000026108 | Variable Rate Demand Instruments  
Holdings [Line Items]  
Percent of Net Asset Value 70.70%