v3.26.1
Short-Term Bond Portfolio Investment Objectives and Goals - Short-Term Bond Portfolio
Dec. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Short-Term Bond Portfolio – Summary
Objective [Heading] <span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;">INVESTMENT OBJECTIVE</span>
Objective, Primary [Text Block] The investment objective of the Portfolio is to provide as high a level of current income as is consistent with prudent investment risk.