Long-Term US Government Bond Portfolio Investment Objectives and Goals - Long-Term US Government Bond Portfolio |
Dec. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | Long-Term U.S. Government 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 seek maximum total return, consistent with preservation of capital and prudent investment management. |