v3.26.1
S000001245 [Member] Investment Objectives and Goals - SMALL CAP INDEX FUND
Mar. 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] SMALL CAP INDEX FUND
Objective [Heading] INVESTMENT OBJECTIVE
Objective, Primary [Text Block]
The Fund seeks to provide investment results approximating the aggregate price and dividend performance of the securities included in the Russell 2000® Index (the “Index”).