<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.0.8</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>51</ContextCount>
  <ElementCount>9</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>41</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000000 - Document - Document and Entity Information {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentDocumentandEntityInformationElements</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000011 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomKIncomeFund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K Income Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomKIncomeFund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K Income Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000021 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2000 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2000Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2000 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000029 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2000 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2000Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2000 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000031 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2005 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2005Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2005 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000039 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2005 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2005Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2005 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000041 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2010 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2010Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2010 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000049 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2010 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2010Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2010 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000051 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2015 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2015Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2015 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000059 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2015 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2015Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2015 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000061 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2020 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2020Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2020 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000069 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2020 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2020Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2020 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000071 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2025 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2025Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2025 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>000079 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2025 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2025Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2025 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>000081 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2030 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2030Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2030 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>000089 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2030 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2030Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2030 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>000091 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2035 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2035Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2035 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>000099 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2035 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2035Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2035 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>000101 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2040 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2040Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2040 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>000109 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2040 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2040Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2040 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>000111 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2045 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2045Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2045 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>000119 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2045 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2045Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2045 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>000121 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2050 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2050Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2050 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>000129 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2050 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2050Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2050 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>000131 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom K 2055 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomK2055Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom K 2055 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>000139 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom K 2055 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomK2055Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom K 2055 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>000141 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedomIncomeFund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom Income Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>000149 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedomIncomeFund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom Income Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>000151 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2000 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2000Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2000 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>000159 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2000 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2000Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2000 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>000161 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2005 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2005Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2005 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>000169 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2005 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2005Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2005 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>000171 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2010 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2010Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2010 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>000179 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2010 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2010Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2010 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>000181 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2015 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2015Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2015 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>000189 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2015 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2015Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2015 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>000191 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2020 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2020Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2020 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>000199 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2020 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2020Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2020 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>000201 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2025 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2025Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2025 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>000209 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2025 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2025Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2025 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>000211 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2030 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2030Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2030 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>000219 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2030 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2030Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2030 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>000221 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2035 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2035Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2035 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>000229 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2035 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2035Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2035 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>000231 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2040 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2040Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2040 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>000239 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2040 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2040Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2040 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>000241 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2045 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2045Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2045 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>000249 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2045 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2045Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2045 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>000251 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2050 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2050Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2050 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>000259 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2050 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2050Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2050 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>000261 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Freedom 2055 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityFreedom2055Fund</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Freedom 2055 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>000269 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Freedom 2055 Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityFreedom2055Fund</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Freedom 2055 Fund</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>000271 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom Income Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedomIncomeFundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom Income Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>000279 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom Income Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedomIncomeFundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom Income Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>000281 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2005 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2005FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2005 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>000289 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2005 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2005FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2005 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>000291 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2010 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2010FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2010 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>000299 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2010 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2010FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2010 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>000301 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2015 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2015FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2015 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>000309 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2015 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2015FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2015 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>000311 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2020 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2020FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2020 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>000319 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2020 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2020FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2020 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>000321 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2025 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2025FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2025 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>000329 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2025 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2025FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2025 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>000331 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2030 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2030FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2030 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>000339 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2030 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2030FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2030 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>000341 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2035 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2035FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2035 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>000349 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2035 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2035FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2035 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>000351 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2040 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2040FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2040 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>000359 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2040 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2040FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2040 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>000361 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2045 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2045FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2045 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>000369 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2045 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2045FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2045 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>000371 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2050 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2050FundClassATBC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2050 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>000379 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2050 Fund Class A T B C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2050FundClassATBC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2050 Fund Class A T B C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>000381 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2055 Fund Class A T C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2055FundClassATC</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2055 Fund Class A T C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>000389 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2055 Fund Class A T C</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2055FundClassATC</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2055 Fund Class A T C</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>000391 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom Income Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedomIncomeFundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom Income Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>000399 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom Income Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedomIncomeFundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom Income Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>000401 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2005 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2005FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2005 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>000409 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2005 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2005FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2005 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>000411 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2010 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2010FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2010 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>000419 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2010 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2010FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2010 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>000421 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2015 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2015FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2015 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>000429 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2015 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2015FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2015 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>000431 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2020 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2020FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2020 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>000439 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2020 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2020FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2020 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>000441 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2025 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2025FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2025 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>000449 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2025 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2025FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2025 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>000451 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2030 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2030FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2030 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>000459 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2030 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2030FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2030 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>000461 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2035 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2035FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2035 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>000469 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2035 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2035FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2035 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>000471 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2040 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2040FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2040 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>000479 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2040 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2040FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2040 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>000481 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2045 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2045FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2045 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>000489 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2045 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2045FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2045 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>000491 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2050 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2050FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2050 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>000499 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2050 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2050FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2050 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>000501 - Document - Risk/Return Supplement {Unlabeled} - Fidelity Advisor Freedom 2055 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSupplementUnlabeledFidelityAdvisorFreedom2055FundInstitutionalClass</Role>
      <ShortName>Risk/Return Supplement  - Fidelity Advisor Freedom 2055 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>000509 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Advisor Freedom 2055 Fund Institutional Class</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFidelityAdvisorFreedom2055FundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data  - Fidelity Advisor Freedom 2055 Fund Institutional Class</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>040000 - Disclosure - Risk/Return Detail Data {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetailData</Role>
      <ShortName>Risk/Return Detail Data</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs />
  <InputFiles>
    <File>fast-20131107.xml</File>
    <File>fast-20131107.xsd</File>
    <File>fast-20131107_cal.xml</File>
    <File>fast-20131107_def.xml</File>
    <File>fast-20131107_lab.xml</File>
    <File>fast-20131107_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
