v3.26.3
Shareholder Report, Holdings (Details)
Jul. 31, 2026
C000018365 | BNP Paribas9412398  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000018365 | FHLB9412638  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000018365 | J.P. Morgan Securities9412414  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018365 | MUFG Securities Americas9412421  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018365 | Natixis S.A.9412424  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000018365 | U.S. Treasury Bills9412370  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000018365 | U.S. Treasury Bills9412358  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000018365 | U.S. Treasury Bills9412365  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000018365 | Goldman Sachs9412409  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000018365 | Mizuho Securities9412418  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000018365 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
C000018365 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 30.50%
C000018365 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000162326 | BNP Paribas9412398  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000162326 | FHLB9412638  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000162326 | J.P. Morgan Securities9412414  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000162326 | MUFG Securities Americas9412421  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000162326 | Natixis S.A.9412424  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000162326 | U.S. Treasury Bills9412370  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000162326 | U.S. Treasury Bills9412358  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000162326 | U.S. Treasury Bills9412365  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000162326 | Goldman Sachs9412409  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000162326 | Mizuho Securities9412418  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000162326 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
C000162326 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 30.50%
C000162326 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000240469 | BNP Paribas9412398  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000240469 | FHLB9412638  
Holdings [Line Items]  
Percent of Total Investments 4.60%
C000240469 | J.P. Morgan Securities9412414  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000240469 | MUFG Securities Americas9412421  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000240469 | Natixis S.A.9412424  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000240469 | U.S. Treasury Bills9412370  
Holdings [Line Items]  
Percent of Total Investments 3.20%
C000240469 | U.S. Treasury Bills9412358  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000240469 | U.S. Treasury Bills9412365  
Holdings [Line Items]  
Percent of Total Investments 2.80%
C000240469 | Goldman Sachs9412409  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000240469 | Mizuho Securities9412418  
Holdings [Line Items]  
Percent of Total Investments 2.60%
C000240469 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
C000240469 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 30.50%
C000240469 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000018374 | U.S. Treasury Bills9411949  
Holdings [Line Items]  
Percent of Total Investments 11.30%
C000018374 | U.S. Treasury Bills9411947  
Holdings [Line Items]  
Percent of Total Investments 9.90%
C000018374 | U.S. Treasury Bills9411952  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000018374 | FHLB9412058  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000018374 | U.S. Treasury Bills9411955  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000018374 | U.S. Treasury Bills9411953  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000018374 | FHLB9412060  
Holdings [Line Items]  
Percent of Total Investments 4.80%
C000018374 | U.S. Treasury Notes9411972  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000018374 | U.S. Treasury Notes9411968  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000018374 | U.S. Treasury Bills9411966  
Holdings [Line Items]  
Percent of Total Investments 2.10%
C000018374 | U.S. Government Agency Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
C000018374 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 70.00%
C000018368 | U.S. Treasury Bills9412390  
Holdings [Line Items]  
Percent of Total Investments 17.60%
C000018368 | U.S. Treasury Bills9412394  
Holdings [Line Items]  
Percent of Total Investments 10.10%
C000018368 | U.S. Treasury Bills9412396  
Holdings [Line Items]  
Percent of Total Investments 9.70%
C000018368 | U.S. Treasury Bills9412401  
Holdings [Line Items]  
Percent of Total Investments 7.50%
C000018368 | U.S. Treasury Bills9412399  
Holdings [Line Items]  
Percent of Total Investments 7.00%
C000018368 | U.S. Treasury Bills9412385  
Holdings [Line Items]  
Percent of Total Investments 6.60%
C000018368 | U.S. Treasury Bills9412404  
Holdings [Line Items]  
Percent of Total Investments 5.00%
C000018368 | U.S. Treasury Bills9412387  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000018368 | U.S. Treasury Notes9412425  
Holdings [Line Items]  
Percent of Total Investments 4.20%
C000018368 | U.S. Treasury Bills9412408  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000018368 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 106.50%
C000022551 | U.S. Treasury Notes9414463  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000022551 | U.S. Treasury Notes9414462  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000022551 | U.S. Treasury Notes9414469  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000022551 | U.S. Treasury Bills9414471  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000022551 | U.S. Treasury Notes9414467  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000022551 | U.S. Treasury Notes9414460  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000022551 | Morgan Stanley9414254  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000022551 | JPMorgan Chase9414238  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000022551 | Synchrony Card Funding LLC9414048  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000022551 | American Express9414292  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000022551 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000022551 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000022551 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000022551 | Municipal Bond  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000022551 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000022551 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
C000022551 | Asset-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000022551 | Corporate Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000158211 | U.S. Treasury Notes9414463  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000158211 | U.S. Treasury Notes9414462  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000158211 | U.S. Treasury Notes9414469  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000158211 | U.S. Treasury Bills9414471  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000158211 | U.S. Treasury Notes9414467  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000158211 | U.S. Treasury Notes9414460  
Holdings [Line Items]  
Percent of Total Investments 1.30%
C000158211 | Morgan Stanley9414254  
Holdings [Line Items]  
Percent of Total Investments 1.00%
C000158211 | JPMorgan Chase9414238  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000158211 | Synchrony Card Funding LLC9414048  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000158211 | American Express9414292  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000158211 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000158211 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000158211 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000158211 | Municipal Bond  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000158211 | Commercial Paper  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000158211 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
C000158211 | Asset-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000158211 | Corporate Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000022552 | U.S. Treasury Notes9417467  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000022552 | U.S. Treasury Notes9417470  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000022552 | U.S. Treasury Notes9417464  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000022552 | U.S. Treasury Notes9417469  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000022552 | FNMA or FHLMC9417082  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000022552 | FHLMC Multifamily Structured Pass-Through Certificates9416730  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000022552 | U.S. Treasury Notes9417466  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000022552 | Seasoned Loans Structured Transaction Trust9416710  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000022552 | GNMA9417027  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000022552 | FNMA REMIC9417254  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000022552 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000022552 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 27.50%
C000022552 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000022552 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 70.00%
C000147419 | U.S. Treasury Notes9417467  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000147419 | U.S. Treasury Notes9417470  
Holdings [Line Items]  
Percent of Total Investments 7.90%
C000147419 | U.S. Treasury Notes9417464  
Holdings [Line Items]  
Percent of Total Investments 5.60%
C000147419 | U.S. Treasury Notes9417469  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000147419 | FNMA or FHLMC9417082  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000147419 | FHLMC Multifamily Structured Pass-Through Certificates9416730  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000147419 | U.S. Treasury Notes9417466  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000147419 | Seasoned Loans Structured Transaction Trust9416710  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000147419 | GNMA9417027  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000147419 | FNMA REMIC9417254  
Holdings [Line Items]  
Percent of Total Investments 1.20%
C000147419 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000147419 | U.S. Treasury Obligation  
Holdings [Line Items]  
Percent of Net Asset Value 27.50%
C000147419 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000147419 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 70.00%
C000022554 | GNMA9417887  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000022554 | GNMA9417810  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000022554 | GNMA9417897  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000022554 | GNMA9417787  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000022554 | GNMA9417761  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000022554 | GNMA9417834  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000022554 | GNMA9417889  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000022554 | GNMA9417904  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000022554 | GNMA9417885  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000022554 | GNMA9417748  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000022554 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000022554 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000022554 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
C000147421 | GNMA9417887  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000147421 | GNMA9417810  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000147421 | GNMA9417897  
Holdings [Line Items]  
Percent of Total Investments 4.90%
C000147421 | GNMA9417787  
Holdings [Line Items]  
Percent of Total Investments 3.70%
C000147421 | GNMA9417761  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000147421 | GNMA9417834  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000147421 | GNMA9417889  
Holdings [Line Items]  
Percent of Total Investments 3.10%
C000147421 | GNMA9417904  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000147421 | GNMA9417885  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000147421 | GNMA9417748  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000147421 | Repurchase Agreement  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000147421 | Futures Contracts  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000147421 | Mortgage-Backed Security  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%