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S000093945 [Member] Investment Objectives and Goals - AB Core Bond ETF
Nov. 30, 2025
Prospectus [Line Items]  
Risk/Return [Heading] AB Core Bond ETF (successor to Bernstein Intermediate Duration Institutional Portfolio)
Objective [Heading] INVESTMENT OBJECTIVE
Objective, Primary [Text Block]
The Fund’s investment objective is to provide safety of principal and a moderate to high rate of current income.