v3.25.4
S000001601 [Member] Investment Objectives and Goals - Short Duration Bond Fund
Oct. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Short Duration Bond Fund
Objective [Heading] Investment Objective (Non-Fundamental)
Objective, Primary [Text Block]
The Fund seeks to provide current income and preservation of capital with a focus on short duration securities.