v3.26.1
S000025873 [Member] Investment Objectives and Goals - TAX-ADVANTAGED ULTRA-SHORT FIXED INCOME FUND
Mar. 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] TAX‑ADVANTAGED ULTRA-SHORT FIXED INCOME FUND
Objective [Heading] INVESTMENT OBJECTIVE
Objective, Primary [Text Block]
The Fund seeks to maximize total return (capital appreciation and income), adjusted for the federal maximum tax rate, to the extent consistent with preservation of principal.