S000001273 [Member] Investment Objectives and Goals - MID CAP INDEX FUND |
Mar. 31, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | MID CAP INDEX FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Fund seeks to provide investment results approximating the overall performance of the common stocks included in the Standard & Poor’s MidCap 400® Composite Stock Price Index (“S&P MidCap 400® Index” or “Index”).
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