S000015790 [Member] Investment Objectives and Goals - BOND INDEX FUND |
Mar. 31, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | BOND INDEX FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Fund seeks to provide investment results approximating the overall performance of the securities included in the Bloomberg U.S. Aggregate Bond Index (the “Index”).
|