v3.26.1
Shareholder Report, Holdings (Details)
Mar. 31, 2026
C000004027 | Repurchase Agreements  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
C000004027 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 25.80%
C000004027 | Certificates of Deposit  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
C000004027 | Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000004027 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000004027 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000004027 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000004027 | Other Money Market Types  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000004029 | Repurchase Agreements  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
C000004029 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 25.80%
C000004029 | Certificates of Deposit  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
C000004029 | Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000004029 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000004029 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000004029 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000004029 | Other Money Market Types  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000004025 | Repurchase Agreements  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
C000004025 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 25.80%
C000004025 | Certificates of Deposit  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
C000004025 | Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000004025 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000004025 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000004025 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000004025 | Other Money Market Types  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000004026 | Repurchase Agreements  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
C000004026 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 25.80%
C000004026 | Certificates of Deposit  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
C000004026 | Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000004026 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000004026 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000004026 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000004026 | Other Money Market Types  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000213745 | Repurchase Agreements  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
C000213745 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 25.80%
C000213745 | Certificates of Deposit  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
C000213745 | Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000213745 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000213745 | Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000213745 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000213745 | Other Money Market Types  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%