v3.26.3
S000045541 [Member] Investment Objectives and Goals - AB International Growth Portfolio
Jun. 30, 2026
Prospectus [Line Items]  
Risk/Return [Heading] AB International Growth Portfolio (formerly, AB Concentrated International Growth Portfolio)
Objective [Heading] INVESTMENT OBJECTIVE
Objective, Primary [Text Block]
The Fund’s investment objective is to seek long-term growth of capital.