000000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 000011 - Document - Risk/Return Summary {Unlabeled} - AllianceBernstein Intermediate Bond Portfolio link:presentationLink link:calculationLink link:definitionLink 000012 - Schedule - Shareholder Fees {- AllianceBernstein Intermediate Bond Portfolio} link:presentationLink link:calculationLink link:definitionLink 000013 - Schedule - Annual Fund Operating Expenses {- AllianceBernstein Intermediate Bond Portfolio} link:presentationLink link:calculationLink link:definitionLink 000014 - Schedule - Expense Example {- AllianceBernstein Intermediate Bond Portfolio} link:presentationLink link:calculationLink link:definitionLink 000015 - Schedule - Expense Example, No Redemption {- AllianceBernstein Intermediate Bond Portfolio} link:presentationLink link:calculationLink link:definitionLink 000016 - Schedule - Annual Total Returns - AllianceBernstein Intermediate Bond Portfolio [BarChart] link:presentationLink link:calculationLink link:definitionLink 000017 - Schedule - Average Annual Total Returns {Transposed} {- AllianceBernstein Intermediate Bond Portfolio} link:presentationLink link:calculationLink link:definitionLink 000018 - Document - Risk/Return Detail {Unlabeled} - AllianceBernstein Intermediate Bond Portfolio link:presentationLink link:calculationLink link:definitionLink 000019 - Disclosure - Risk/Return Detail Data {Elements} - AllianceBernstein Intermediate Bond Portfolio link:presentationLink link:calculationLink link:definitionLink 000021 - Document - Risk/Return Summary {Unlabeled} - AllianceBernstein Limited Duration High Income Portfolio link:presentationLink link:calculationLink link:definitionLink 000022 - Schedule - Shareholder Fees {- AllianceBernstein Limited Duration High Income Portfolio} link:presentationLink link:calculationLink link:definitionLink 000023 - Schedule - Annual Fund Operating Expenses {- AllianceBernstein Limited Duration High Income Portfolio} link:presentationLink link:calculationLink link:definitionLink 000024 - Schedule - Expense Example {- AllianceBernstein Limited Duration High Income Portfolio} link:presentationLink link:calculationLink link:definitionLink 000025 - Schedule - Expense Example, No Redemption {Transposed} {- AllianceBernstein Limited Duration High Income Portfolio} link:presentationLink link:calculationLink link:definitionLink 000026 - Schedule - Annual Total Returns - AllianceBernstein Limited Duration High Income Portfolio [BarChart] link:presentationLink link:calculationLink link:definitionLink 000027 - Schedule - Average Annual Total Returns {Transposed} {- AllianceBernstein Limited Duration High Income Portfolio} link:presentationLink link:calculationLink link:definitionLink 000028 - Document - Risk/Return Detail {Unlabeled} - AllianceBernstein Limited Duration High Income Portfolio link:presentationLink link:calculationLink link:definitionLink 000029 - Disclosure - Risk/Return Detail Data {Elements} - AllianceBernstein Limited Duration High Income Portfolio link:presentationLink link:calculationLink link:definitionLink