AB Fixed Income Taxable Portfolios [Member] Average Annual Total Returns - AB Fixed Income Taxable Portfolios |
12 Months Ended | 60 Months Ended | 77 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|||
| Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% | |||
| AB Core Bond Class Z | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [1] | 7.30% | (0.44%) | 2.07% | ||
| Performance Inception Date | Jul. 23, 2019 | |||||
| AB Core Bond Class Z | After Taxes on Distributions | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [1] | 5.40% | (1.79%) | 0.73% | ||
| AB Core Bond Class Z | After Taxes on Distributions and Sales | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | [1] | 4.29% | (0.90%) | 1.03% | ||
| ||||||