AB Fixed Income Taxable Portfolio [Member] Investment Objectives and Goals - AB Fixed-Income Taxable Portfolio - Intermediate Duration Portfolio |
Mar. 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | SUMMARY INFORMATIONAB FIXED-INCOME TAXABLE PORTFOLIOAB Core Bond Portfolio (formerly, AB Intermediate Duration Portfolio) |
| Objective [Heading] | INVESTMENT OBJECTIVE: |
| Objective, Primary [Text Block] | The Portfolio’s investment objective is to provide safety of principal and a moderate to high rate of income that is subject to taxes.
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