<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:cso="http://www.proofPlus.com/20221230"
  xmlns:dei="http://xbrl.sec.gov/dei/2021"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:rr="http://xbrl.sec.gov/rr/2021"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xhtml="http://www.w3.org/1999/xhtml"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef xlink:href="cso-20221230.xsd" xlink:type="simple"/>
    <context id="Trust">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048858Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048861Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048860Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048862Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000205047Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048858_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048858Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048858_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048858Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048858_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsAndSalesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048858Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048861_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048861Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048860_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048860Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048862_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048862Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000205047_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000205047Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:IndexSP026Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048863Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048863_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048863Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048863_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048863Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_C000048863_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsAndSalesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048863Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017683Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:IndexSP026Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048866Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048864Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048868Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048865Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000205048Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048866_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048866Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048866_AfterTaxesOnDistributions_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048866Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048866_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsAndSalesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048866Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048864_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048864Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048868_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048868Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000048865_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048865Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_C000205048_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000205048Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017684_IndexML040_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017684Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:IndexML040Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048879Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048882Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048881Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048883Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000177521Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048879_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048879Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048879_AfterTaxesOnDistributions_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048879Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048879_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsAndSalesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048879Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048882_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048882Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048881_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048881Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000048883_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000048883Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_C000177521_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:ReturnBeforeTaxesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">cso:C000177521Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <context id="S000017687_IndexRS013_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000722574</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">cso:D1031FidelityAdvisorValueFundAMCIZPRO15Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cso:S000017687Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">cso:IndexRS013Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2022-12-30</startDate>
            <endDate>2022-12-30</endDate>
        </period>
    </context>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <dei:DocumentType contextRef="Trust">485BPOS</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="Trust">2022-10-31</dei:DocumentPeriodEndDate>
    <dei:AmendmentFlag contextRef="Trust">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="Trust">0000722574</dei:EntityCentralIndexKey>
    <dei:EntityInvCompanyType contextRef="Trust">N-1A</dei:EntityInvCompanyType>
    <rr:AnnualReturn2012
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0661</rr:AnnualReturn2012>
    <rr:AnnualReturn2013
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0362</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0002</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">-0.0144</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0972</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0350</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">-0.0011</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0816</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0136</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0534</rr:AnnualReturn2021>
    <rr:AnnualReturn2012
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0681</rr:AnnualReturn2012>
    <rr:AnnualReturn2013
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0392</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0041</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">-0.0117</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0992</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0390</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0007</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0860</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0167</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="INF"
      unitRef="pure">0.0555</rr:AnnualReturn2021>
    <rr:AnnualReturn2012
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.1803</rr:AnnualReturn2012>
    <rr:AnnualReturn2013
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.0999</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.0386</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">-0.0301</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.1336</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.1138</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">-0.0546</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.1736</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.0869</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="INF"
      unitRef="pure">0.1129</rr:AnnualReturn2021>
    <rr:AnnualReturn2012
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.2109</rr:AnnualReturn2012>
    <rr:AnnualReturn2013
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.3632</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.1127</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">-0.0677</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.1559</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.1499</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">-0.1780</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.3134</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.0951</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="INF"
      unitRef="pure">0.3476</rr:AnnualReturn2021>
    <dei:EntityRegistrantName contextRef="Trust">FIDELITY ADVISOR SERIES I</dei:EntityRegistrantName>
    <rr:RiskReturnHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Fund Summary
                  Fund/Class:Fidelity Advisor&#xae; Floating Rate High Income Fund/A, M, C, I, Z

</rr:RiskReturnHeading>
    <rr:ObjectiveHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Investment Objective

</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         The fund seeks a high level of current income.

</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Fee Table

</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">                  The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases
               and sales of certain share classes of the fund.

                  You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least  $50,000  in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution"
               section beginning on page 29 of the prospectus.  Different intermediaries may provide additional waivers or reductions of the sales charge. Please see &#x93;Sales Charge Waiver
            Policies Applied by Certain Intermediaries&#x94; in the &#x93;Appendix&#x94; section of the prospectus.


</rr:ExpenseNarrativeTextBlock>
    <rr:ExpenseBreakpointDiscounts contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least  $50,000  in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution"
               section beginning on page 29 of the prospectus.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount
      contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ShareholderFeesCaption contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">                  Shareholder fees
                  (fees paid directly from your investment)

</rr:ShareholderFeesCaption>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0275</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0275</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_852500151_10"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_852500151_12"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_852500151_14"
      unitRef="pure">0.0100</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Purchases of $250,000 or more will not be subject to a front-end sales charge, but may be subject to a 0.50% contingent deferred
                  sales charge (CDSC) if the intermediary firm has elected an upfront finder's fee at the time the shares are purchased, or
                  a 1.00% CDSC if the shares purchased are recordkept in a Fidelity Advisor&#xae; 401(k) Retirement Plan.</rr:ExpensesDeferredChargesTextBlock>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Purchases of $250,000 or more will not be subject to a front-end sales charge but may be subject to a 0.25% CDSC if a finder's
                  fee is paid at the time the shares are purchased.</rr:ExpensesDeferredChargesTextBlock>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">On Class C shares redeemed less than one year after purchase.</rr:ExpensesDeferredChargesTextBlock>
    <rr:OperatingExpensesCaption contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">                  Annual Operating Expenses
                  (expenses that you pay each year as a % of the value of your investment)

</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0100</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0017</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0017</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0017</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0017</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0007</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0097</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0097</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0172</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0072</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0062</rr:ExpensesOverAssets>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">                  This example helps compare the cost of investing in the fund with the cost of investing in other funds.

                  Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual
            operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses
            or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end
            of each time period indicated and if you hold your shares:


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">371</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">371</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">371</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">371</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">275</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">175</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">74</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">74</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">63</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">63</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear03
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">575</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">575</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">575</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">575</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">542</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">542</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">230</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">230</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">199</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">199</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear05
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">797</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">797</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">797</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">797</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">933</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">933</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">401</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">401</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">346</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">346</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear10
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1432</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1432</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1432</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017683_C000048861_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1432</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1831</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017683_C000048860_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1831</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">894</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017683_C000048862_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">894</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">774</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017683_C000205047_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">774</rr:ExpenseExampleNoRedemptionYear10>
    <rr:PortfolioTurnoverHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Portfolio Turnover

</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are
            held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 27%  of the average value of its portfolio.


</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.27</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Principal Investment Strategies

</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
            Normally investing at least 80% of assets in floating rate loans, which are often lower-quality debt securities (those of
               less than investment-grade quality, also referred to as high yield debt securities or junk bonds), and other floating rate
               securities.



            Investing in companies in troubled or uncertain financial condition.


            Investing in money market and investment-grade debt securities, and repurchase agreements.


            Investing in domestic and foreign issuers.


            Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to
               select investments.



</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Principal Investment Risks

</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">
            Impairment of Collateral.&#160;A floating rate loan may not be fully collateralized which may cause the floating rate loan to decline significantly in value.



            Floating Rate Loan Liquidity.&#160;Floating rate loans generally are subject to restrictions on resale. Floating rate loans sometimes trade infrequently in the
               secondary market. As a result, valuing a floating rate loan can be more difficult, and buying and selling a floating rate
               loan at an acceptable price can be more difficult or delayed, including extended trade settlement periods. Difficulty in selling
               a floating rate loan can result in a loss.



            Interest Rate Changes.&#160;Interest rate increases can cause the price of a debt security to decrease.



            Foreign Exposure.&#160;Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory,
               market, or economic developments and can perform differently from the U.S. market.



            Prepayment.&#160;The ability of an issuer of a debt security to repay principal prior to a security's maturity can limit the potential for
               gains when the credit quality of the issuer improves.



            Issuer-Specific Changes.&#160;The value of an individual security or particular type of security can be more volatile than, and can perform differently
               from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities
               or junk bonds), including floating rate loans, involve greater risk of default on interest and principal payments or price
               changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities, including floating
               rate loans, can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic
               developments.


                  An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.  You could lose money by investing in the fund.


</rr:RiskNarrativeTextBlock>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskLoseMoney contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">You could lose money by investing in the fund.</rr:RiskLoseMoney>
    <rr:BarChartAndPerformanceTableHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Performance

</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">                  The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.  The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

                  Visit institutional.fidelity.com  for more recent performance information.


</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Past performance (before and after taxes) is not an indication of future performance.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">institutional.fidelity.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:BarChartHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Year-by-Year Returns

</rr:BarChartHeading>
    <rr:BarChartNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be
               lower than those shown.


</rr:BarChartNarrativeTextBlock>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be
               lower than those shown.</rr:BarChartDoesNotReflectSalesLoads>
    <rr:HighestQuarterlyReturnLabel contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Highest Quarter Return</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0841</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Lowest Quarter Return</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">-0.1315</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:YearToDateReturnLabel contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Year-to-Date Return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturn
      contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">-0.0341</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturnDate contextRef="S000017683_C000048858_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">2022-09-30</rr:BarChartYearToDateReturnDate>
    <rr:PerformanceTableHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Average Annual Returns

</rr:PerformanceTableHeading>
    <rr:PerformanceTableNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">         Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.  After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.  After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.  Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).  Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.


</rr:PerformanceTableNarrativeTextBlock>
    <rr:PerformanceTableDoesReflectSalesLoads contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</rr:PerformanceTableDoesReflectSalesLoads>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048858_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Class A - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048858_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0244</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048858_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0303</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048858_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0333</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048858_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Return After Taxes on Distributions</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048858_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0121</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048858_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0139</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048858_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0175</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048858_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Return After Taxes on Distributions and Sale of Fund Shares</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048858_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0143</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048858_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0158</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048858_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0184</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048861_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Class M - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048861_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0233</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048861_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0302</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048861_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0327</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048860_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Class C - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048860_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0344</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048860_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0283</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048860_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0300</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048862_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Class I - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048862_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0561</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048862_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0388</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048862_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0387</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000205047_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Class Z - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000205047_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0560</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="S000017683_C000205047_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_852500467_141"
      unitRef="pure">0.0376</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000205047_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnInceptionDate contextRef="S000017683_C000205047_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">2018-10-02</rr:AverageAnnualReturnInceptionDate>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member">Morningstar&#xae; LSTA&#xae; US Performing Loans(reflects no deduction for fees, expenses, or taxes)
               </rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0542</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0447</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0494</rr:AverageAnnualReturnYear10>
    <rr:RiskReturnHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Fund Summary
                  Fund/Class:Fidelity Advisor&#xae; Floating Rate High Income Fund/Fidelity&#xae; Floating Rate High Income Fund

</rr:RiskReturnHeading>
    <rr:ObjectiveHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Investment Objective

</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         The fund seeks a high level of current income.

</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Fee Table

</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases
               and sales of certain share classes of the fund.


</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Shareholder fees

</rr:ShareholderFeesCaption>
    <rr:ShareholderFeeOther
      contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="0"
      unitRef="usd">0</rr:ShareholderFeeOther>
    <rr:OperatingExpensesCaption contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">                  Annual Operating Expenses
                  (expenses that you pay each year as a % of the value of your investment)

</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0013</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0068</rr:ExpensesOverAssets>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">                  This example helps compare the cost of investing in the fund with the cost of investing in other funds.

                  Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual
            operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses
            or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end
            of each time period indicated:


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="0"
      unitRef="usd">69</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="0"
      unitRef="usd">218</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="0"
      unitRef="usd">379</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="0"
      unitRef="usd">847</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Portfolio Turnover

</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are
            held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 27%  of the average value of its portfolio.


</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.27</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Principal Investment Strategies

</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
            Normally investing at least 80% of assets in floating rate loans, which are often lower-quality debt securities (those of
               less than investment-grade quality, also referred to as high yield debt securities or junk bonds), and other floating rate
               securities.



            Investing in companies in troubled or uncertain financial condition.


            Investing in money market and investment-grade debt securities, and repurchase agreements.


            Investing in domestic and foreign issuers.


            Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to
               select investments.



</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Principal Investment Risks

</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">
            Impairment of Collateral.&#160;A floating rate loan may not be fully collateralized which may cause the floating rate loan to decline significantly in value.



            Floating Rate Loan Liquidity.&#160;Floating rate loans generally are subject to restrictions on resale. Floating rate loans sometimes trade infrequently in the
               secondary market. As a result, valuing a floating rate loan can be more difficult, and buying and selling a floating rate
               loan at an acceptable price can be more difficult or delayed, including extended trade settlement periods. Difficulty in selling
               a floating rate loan can result in a loss.



            Interest Rate Changes.&#160;Interest rate increases can cause the price of a debt security to decrease.



            Foreign Exposure.&#160;Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory,
               market, or economic developments and can perform differently from the U.S. market.



            Prepayment.&#160;The ability of an issuer of a debt security to repay principal prior to a security's maturity can limit the potential for
               gains when the credit quality of the issuer improves.



            Issuer-Specific Changes.&#160;The value of an individual security or particular type of security can be more volatile than, and can perform differently
               from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities
               or junk bonds), including floating rate loans, involve greater risk of default on interest and principal payments or price
               changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities, including floating
               rate loans, can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic
               developments.


                  An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.  You could lose money by investing in the fund.


</rr:RiskNarrativeTextBlock>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskLoseMoney contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">You could lose money by investing in the fund.</rr:RiskLoseMoney>
    <rr:BarChartAndPerformanceTableHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Performance

</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">                  The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.  The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

                  Visit www.fidelity.com  for more recent performance information.


</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Past performance (before and after taxes) is not an indication of future performance.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">www.fidelity.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:BarChartHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Year-by-Year Returns

</rr:BarChartHeading>
    <rr:HighestQuarterlyReturnLabel contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Highest Quarter Return</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0838</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Lowest Quarter Return</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">-0.1310</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:YearToDateReturnLabel contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Year-to-Date Return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturn
      contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">-0.0310</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturnDate contextRef="S000017683_C000048863_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">2022-09-30</rr:BarChartYearToDateReturnDate>
    <rr:PerformanceTableHeading contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         Average Annual Returns

</rr:PerformanceTableHeading>
    <rr:PerformanceTableNarrativeTextBlock contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">         After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.  Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).  Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.


</rr:PerformanceTableNarrativeTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="S000017683_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048863_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048863_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0555</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048863_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0392</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048863_ReturnBeforeTaxes_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0391</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048863_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Return After Taxes on Distributions</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048863_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0415</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048863_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0213</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048863_AfterTaxesOnDistributions_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0220</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_C000048863_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Return After Taxes on Distributions and Sale of Fund Shares</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_C000048863_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0327</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_C000048863_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0221</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_C000048863_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0224</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member">Morningstar&#xae; LSTA&#xae; US Performing Loans(reflects no deduction for fees, expenses, or taxes)
               </rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0542</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0447</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017683_IndexSP026_D1031FidelityAdvisorFloatingRateHighIncomeFundRetailPRO09Member"
      decimals="4"
      unitRef="pure">0.0494</rr:AverageAnnualReturnYear10>
    <rr:RiskReturnHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Fund Summary
                  Fund/Class:Fidelity Advisor&#xae; High Income Advantage Fund/A, M, C, I, Z

</rr:RiskReturnHeading>
    <rr:ObjectiveHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Investment Objective

</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         The fund seeks a combination of a high level of income and the potential for capital gains.

</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Fee Table

</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">                  The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases
               and sales of certain share classes of the fund.

                  You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least  $50,000  in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution"
               section beginning on page 31 of the prospectus.  Different intermediaries may provide additional waivers or reductions of the sales charge. Please see &#x93;Sales Charge Waiver
            Policies Applied by Certain Intermediaries&#x94; in the &#x93;Appendix&#x94; section of the prospectus.


</rr:ExpenseNarrativeTextBlock>
    <rr:ExpenseBreakpointDiscounts contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least  $50,000  in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution"
               section beginning on page 31 of the prospectus.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount
      contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ShareholderFeesCaption contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">                  Shareholder fees
                  (fees paid directly from your investment)

</rr:ShareholderFeesCaption>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0400</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0400</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630695_218"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630695_220"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630695_222"
      unitRef="pure">0.0100</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class
                  M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.</rr:ExpensesDeferredChargesTextBlock>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">On Class C shares redeemed less than one year after purchase.</rr:ExpensesDeferredChargesTextBlock>
    <rr:OperatingExpensesCaption contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">                  Annual Operating Expenses
                  (expenses that you pay each year as a % of the value of your investment)

</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0055</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0100</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0021</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0021</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0023</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0021</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0011</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0101</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0101</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0178</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0076</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0066</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630700_247"
      unitRef="pure">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630700_248"
      unitRef="pure">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630700_249"
      unitRef="pure">-0.0003</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630700_250"
      unitRef="pure">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630700_251"
      unitRef="pure">-0</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0100</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0100</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0175</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0075</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0066</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">February 29, 2024</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">                  This example helps compare the cost of investing in the fund with the cost of investing in other funds.

                  Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual
            operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses
            or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end
            of each time period indicated and if you hold your shares:


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">498</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">498</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">498</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">498</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">278</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">178</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">77</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">77</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">67</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">67</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear03
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">707</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">707</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">707</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">707</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">556</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">556</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">241</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">241</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">211</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">211</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear05
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">934</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">934</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">934</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">934</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">961</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">961</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">421</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">421</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">368</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">368</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear10
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">1586</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">1586</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">1586</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017684_C000048864_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">1586</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">1888</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017684_C000048868_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">1888</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">941</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017684_C000048865_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">941</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">822</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017684_C000205048_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="0"
      unitRef="usd">822</rr:ExpenseExampleNoRedemptionYear10>
    <rr:PortfolioTurnoverHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Portfolio Turnover

</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are
            held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 29%  of the average value of its portfolio.


</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.29</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Principal Investment Strategies

</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
            Normally investing primarily in income-producing debt securities, preferred stocks, and convertible securities, with an emphasis
               on lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities
               or junk bonds).



            Potentially investing in non-income producing securities, including defaulted securities and common stocks.


            Investing up to 20% of total assets in common stocks.


            Investing in companies in troubled or uncertain financial condition.


            Investing in domestic and foreign issuers.


            Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to
               select investments.



</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Principal Investment Risks

</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">
            Stock Market Volatility.&#160;Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or
               economic developments. Different parts of the market, including different market sectors, and different types of securities
               can react differently to these developments.



            Interest Rate Changes.&#160;Interest rate increases can cause the price of a debt security to decrease.



            Foreign Exposure.&#160;Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse
               issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.



            Issuer-Specific Changes.&#160;The value of an individual security or particular type of security can be more volatile than, and can perform differently
               from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities
               or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the
               credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity
               to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell.


                  An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.  You could lose money by investing in the fund.


</rr:RiskNarrativeTextBlock>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskLoseMoney contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">You could lose money by investing in the fund.</rr:RiskLoseMoney>
    <rr:BarChartAndPerformanceTableHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Performance

</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">                  The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.  The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

                  Visit institutional.fidelity.com  for more recent performance information.


</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Past performance (before and after taxes) is not an indication of future performance.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"> institutional.fidelity.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:BarChartHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Year-by-Year Returns

</rr:BarChartHeading>
    <rr:BarChartNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be
               lower than those shown.


</rr:BarChartNarrativeTextBlock>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be
               lower than those shown.</rr:BarChartDoesNotReflectSalesLoads>
    <rr:HighestQuarterlyReturnLabel contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Highest Quarter Return</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.1323</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Lowest Quarter Return</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">-0.1792</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:YearToDateReturnLabel contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Year-to-Date Return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturn
      contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">-0.1432</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturnDate contextRef="S000017684_C000048866_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">2022-09-30</rr:BarChartYearToDateReturnDate>
    <rr:PerformanceTableHeading contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Average Annual Returns

</rr:PerformanceTableHeading>
    <rr:PerformanceTableNarrativeTextBlock contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">         Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.  After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.  After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.  Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).  Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.


</rr:PerformanceTableNarrativeTextBlock>
    <rr:PerformanceTableDoesReflectSalesLoads contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</rr:PerformanceTableDoesReflectSalesLoads>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="S000017684_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000048866_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Class A - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000048866_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0683</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_C000048866_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0749</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000048866_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0784</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000048866_AfterTaxesOnDistributions_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Return After Taxes on Distributions</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000048866_AfterTaxesOnDistributions_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0497</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_C000048866_AfterTaxesOnDistributions_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0551</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000048866_AfterTaxesOnDistributions_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0574</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000048866_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Return After Taxes on Distributions and Sale of Fund Shares</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000048866_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0430</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_C000048866_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0491</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000048866_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0520</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000048864_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Class M - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000048864_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0679</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_C000048864_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0749</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000048864_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0785</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000048868_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Class C - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000048868_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0945</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_C000048868_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0756</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000048868_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0764</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000048865_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Class I - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000048865_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.1150</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_C000048865_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000048865_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0854</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_C000205048_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">Class Z - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_C000205048_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.1170</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="S000017684_C000205048_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      id="id_footnote_elem_851630987_360"
      unitRef="pure">0.0876</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_C000205048_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnInceptionDate contextRef="S000017684_C000205048_ReturnBeforeTaxes_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">2018-10-02</rr:AverageAnnualReturnInceptionDate>
    <rr:AverageAnnualReturnLabel contextRef="S000017684_IndexML040_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member">ICE&#xae; BofA&#xae; US High Yield Constrained Index(reflects no deduction for fees, expenses, or taxes)
               </rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017684_IndexML040_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0535</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017684_IndexML040_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0608</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017684_IndexML040_D1031FidelityAdvisorHighIncomeAdvantageFundAMCIZPRO13Member"
      decimals="4"
      unitRef="pure">0.0671</rr:AverageAnnualReturnYear10>
    <rr:RiskReturnHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Fund Summary
                  Fund/Class:Fidelity Advisor&#xae; Value Fund/A, M, C, I, Z

</rr:RiskReturnHeading>
    <rr:ObjectiveHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Investment Objective

</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         The fund seeks capital appreciation.

</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Fee Table

</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">                  The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases
               and sales of certain share classes of the fund.

                  You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least  $50,000  in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution"
               section beginning on page 28 of the prospectus.  Different intermediaries may provide additional waivers or reductions of the sales charge. Please see &#x93;Sales Charge Waiver
            Policies Applied by Certain Intermediaries&#x94; in the &#x93;Appendix&#x94; section of the prospectus.


</rr:ExpenseNarrativeTextBlock>
    <rr:ExpenseBreakpointDiscounts contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least  $50,000  in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution"
               section beginning on page 28 of the prospectus.</rr:ExpenseBreakpointDiscounts>
    <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount
      contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <rr:ShareholderFeesCaption contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">                  Shareholder fees
                  (fees paid directly from your investment)

</rr:ShareholderFeesCaption>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0575</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0350</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOfferingPrice>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503744_376"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503744_378"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503744_380"
      unitRef="pure">0.0100</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:MaximumDeferredSalesChargeOverOther
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class
                  M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.</rr:ExpensesDeferredChargesTextBlock>
    <rr:ExpensesDeferredChargesTextBlock contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member">On Class C shares redeemed less than one year after purchase.</rr:ExpensesDeferredChargesTextBlock>
    <rr:OperatingExpensesCaption contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">                  Annual Operating Expenses
                  (expenses that you pay each year as a % of the value of your investment)

</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_384"
      unitRef="pure">0.0061</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_385"
      unitRef="pure">0.0061</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_386"
      unitRef="pure">0.0061</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_387"
      unitRef="pure">0.0061</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_388"
      unitRef="pure">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0050</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0100</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0029</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0029</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0032</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0027</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0015</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0115</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0140</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0193</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0088</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0076</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_405"
      unitRef="pure">-0</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_406"
      unitRef="pure">-0</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_407"
      unitRef="pure">-0.0003</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_408"
      unitRef="pure">-0</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851503749_409"
      unitRef="pure">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0115</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0140</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0190</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0088</rr:NetExpensesOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0075</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">February 29, 2024</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">                  This example helps compare the cost of investing in the fund with the cost of investing in other funds.

                  Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual
            operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses
            or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end
            of each time period indicated and if you hold your shares:


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">685</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">685</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">488</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">488</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">293</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">193</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">90</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">90</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear01
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">77</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleNoRedemptionYear01
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">77</rr:ExpenseExampleNoRedemptionYear01>
    <rr:ExpenseExampleYear03
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">919</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">919</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">778</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">778</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">602</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">602</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">281</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">281</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear03
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">241</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleNoRedemptionYear03
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">241</rr:ExpenseExampleNoRedemptionYear03>
    <rr:ExpenseExampleYear05
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1172</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1172</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1089</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1089</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1038</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1038</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">488</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">488</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear05
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">421</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleNoRedemptionYear05
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">421</rr:ExpenseExampleNoRedemptionYear05>
    <rr:ExpenseExampleYear10
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1892</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1892</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1971</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017687_C000048882_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1971</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">2048</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017687_C000048881_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">2048</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1084</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017687_C000048883_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">1084</rr:ExpenseExampleNoRedemptionYear10>
    <rr:ExpenseExampleYear10
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">941</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleNoRedemptionYear10
      contextRef="S000017687_C000177521_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="0"
      unitRef="usd">941</rr:ExpenseExampleNoRedemptionYear10>
    <rr:PortfolioTurnoverHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Portfolio Turnover

</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are
            held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 67%  of the average value of its portfolio.


</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.67</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Principal Investment Strategies

</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
            Normally investing primarily in common stocks.


            Investing in securities of companies that possess valuable fixed assets or that Fidelity Management &amp; Research Company LLC
               (FMR) believes are undervalued in the marketplace in relation to factors such as assets, earnings, or growth potential (stocks
               of these companies are often called "value" stocks).



            Focusing investments in medium-sized companies, but also may invest substantially in larger or small companies.


            Investing in domestic and foreign issuers.


            Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and
               economic conditions, to select investments.



</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Principal Investment Risks

</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">
            Stock Market Volatility.&#160;Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or
               economic developments. Different parts of the market, including different market sectors, and different types of securities
               can react differently to these developments.



            Foreign Exposure.&#160;Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory,
               market, or economic developments and can perform differently from the U.S. market.



            Issuer-Specific Changes.&#160;The value of an individual security or particular type of security can be more volatile than, and can perform differently
               from, the market as a whole.



            "Value" Investing.&#160;"Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued
               by the market for long periods of time.


                  An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.  You could lose money by investing in the fund.


</rr:RiskNarrativeTextBlock>
    <rr:RiskNotInsuredDepositoryInstitution contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation
               or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
    <rr:RiskLoseMoney contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">You could lose money by investing in the fund.</rr:RiskLoseMoney>
    <rr:BarChartAndPerformanceTableHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Performance

</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">                  The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.  The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

                  Visit institutional.fidelity.com  for more recent performance information.


</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance
               of the fund's shares to the performance of a securities market index over various periods of time.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Past performance (before and after taxes) is not an indication of future performance.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">institutional.fidelity.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:BarChartHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Year-by-Year Returns

</rr:BarChartHeading>
    <rr:BarChartNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be
               lower than those shown.


</rr:BarChartNarrativeTextBlock>
    <rr:BarChartDoesNotReflectSalesLoads contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be
               lower than those shown.</rr:BarChartDoesNotReflectSalesLoads>
    <rr:HighestQuarterlyReturnLabel contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Highest Quarter Return</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.2923</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">2020-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Lowest Quarter Return</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">-0.3720</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:YearToDateReturnLabel contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Year-to-Date Return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturn
      contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">-0.2010</rr:BarChartYearToDateReturn>
    <rr:BarChartYearToDateReturnDate contextRef="S000017687_C000048879_D1031FidelityAdvisorValueFundAMCIZPRO15Member">2022-09-30</rr:BarChartYearToDateReturnDate>
    <rr:PerformanceTableHeading contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Average Annual Returns

</rr:PerformanceTableHeading>
    <rr:PerformanceTableNarrativeTextBlock contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">         Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.  After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.  After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.  Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).  Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.


</rr:PerformanceTableNarrativeTextBlock>
    <rr:PerformanceTableDoesReflectSalesLoads contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</rr:PerformanceTableDoesReflectSalesLoads>
    <rr:PerformanceTableUsesHighestFederalRate contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect
               the impact of state or local taxes.</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement,
               such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher contextRef="S000017687_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a
               tax benefit of realizing a capital loss upon the sale of fund shares.</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000048879_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Class A - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000048879_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.2701</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_C000048879_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1154</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000048879_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1308</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000048879_AfterTaxesOnDistributions_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Return After Taxes on Distributions</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000048879_AfterTaxesOnDistributions_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.2537</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_C000048879_AfterTaxesOnDistributions_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1018</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000048879_AfterTaxesOnDistributions_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1227</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000048879_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Return After Taxes on Distributions and Sale of Fund Shares</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000048879_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1660</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_C000048879_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.0873</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000048879_AfterTaxesOnDistributionsAndSales_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1070</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000048882_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Class M - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000048882_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.2972</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_C000048882_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1177</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000048882_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1304</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000048881_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Class C - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000048881_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.3276</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_C000048881_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1198</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000048881_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1305</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000048883_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Class I - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000048883_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.3512</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_C000048883_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1321</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000048883_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1407</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_C000177521_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Class Z - Return Before Taxes</rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_C000177521_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.3531</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="S000017687_C000177521_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      id="id_footnote_elem_851504044_518"
      unitRef="pure">0.1315</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_C000177521_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnInceptionDate contextRef="S000017687_C000177521_ReturnBeforeTaxes_D1031FidelityAdvisorValueFundAMCIZPRO15Member">2017-02-01</rr:AverageAnnualReturnInceptionDate>
    <rr:AverageAnnualReturnLabel contextRef="S000017687_IndexRS013_D1031FidelityAdvisorValueFundAMCIZPRO15Member">Russell Midcap&#xae; Value Index(reflects no deduction for fees, expenses, or taxes)
               </rr:AverageAnnualReturnLabel>
    <rr:AverageAnnualReturnYear01
      contextRef="S000017687_IndexRS013_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.2834</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="S000017687_IndexRS013_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1122</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="S000017687_IndexRS013_D1031FidelityAdvisorValueFundAMCIZPRO15Member"
      decimals="4"
      unitRef="pure">0.1344</rr:AverageAnnualReturnYear10>
    <link:footnoteLink
      xlink:role="http://www.xbrl.org/2003/role/link"
      xlink:type="extended">
        <link:loc
          xlink:href="#id_footnote_elem_852500151_10"
          xlink:label="id_footnote_elem_852500151_10"
          xlink:type="locator"/>
        <link:footnote id="footnote_852214748" xlink:label="footnote_852214748" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i>Purchases of $250,000 or more will not be subject to a front-end sales charge, but may be subject to a 0.50% contingent deferred
                  sales charge (CDSC) if the intermediary firm has elected an upfront finder's fee at the time the shares are purchased, or
                  a 1.00% CDSC if the shares purchased are recordkept in a Fidelity Advisor<xhtml:sup>&#xae;</xhtml:sup> 401(k) Retirement Plan. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_852500151_10"
          xlink:to="footnote_852214748"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_852500151_12"
          xlink:label="id_footnote_elem_852500151_12"
          xlink:type="locator"/>
        <link:footnote id="footnote_852214749" xlink:label="footnote_852214749" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(b)</xhtml:sup><xhtml:i>Purchases of $250,000 or more will not be subject to a front-end sales charge but may be subject to a 0.25% CDSC if a finder's
                  fee is paid at the time the shares are purchased. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_852500151_12"
          xlink:to="footnote_852214749"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_852500151_14"
          xlink:label="id_footnote_elem_852500151_14"
          xlink:type="locator"/>
        <link:footnote id="footnote_852214750" xlink:label="footnote_852214750" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(c)</xhtml:sup><xhtml:i>On Class C shares redeemed less than one year after purchase. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_852500151_14"
          xlink:to="footnote_852214750"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_852500467_141"
          xlink:label="id_footnote_elem_852500467_141"
          xlink:type="locator"/>
        <link:footnote id="footnote_418130955" xlink:label="footnote_418130955" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i>Since inception October 2, 2018.</xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_852500467_141"
          xlink:to="footnote_418130955"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630695_218"
          xlink:label="id_footnote_elem_851630695_218"
          xlink:type="locator"/>
        <link:footnote id="footnote_851166323" xlink:label="footnote_851166323" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i>Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class
                  M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630695_218"
          xlink:to="footnote_851166323"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630695_220"
          xlink:label="id_footnote_elem_851630695_220"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630695_220"
          xlink:to="footnote_851166323"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630695_222"
          xlink:label="id_footnote_elem_851630695_222"
          xlink:type="locator"/>
        <link:footnote id="footnote_851166324" xlink:label="footnote_851166324" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(b)</xhtml:sup><xhtml:i>On Class C shares redeemed less than one year after purchase. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630695_222"
          xlink:to="footnote_851166324"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630700_247"
          xlink:label="id_footnote_elem_851630700_247"
          xlink:type="locator"/>
        <link:footnote id="footnote_851177102" xlink:label="footnote_851177102" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i><xhtml:span class="redline">Fidelity Management &amp; Research Company LLC (FMR) has contractually agreed to reimburse Class A, Class M, Class C, and Class
                  I of the fund to the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent
                  Trustees, proxy and shareholder meeting expenses, extraordinary expenses, and acquired fund fees and expenses (including fees
                  and expenses associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions
                  and fees and expenses associated with the fund's securities lending program, if applicable), as a percentage of their respective
                  average net assets, exceed 1.00%, 1.00%, 1.75%, and 0.75% (the Expense Caps). If at any time during the current fiscal year
                  expenses for Class A, Class M, Class C, and Class I of the fund fall below the Expense Caps, FMR reserves the right to recoup
                  through the end of the fiscal year any expenses that were reimbursed during the current fiscal year up to, but not in excess
                  of, the Expense Caps. These arrangements will remain in effect through February 29, 2024 . FMR may not terminate these arrangements before the expiration date without the approval of the Board of Trustees and may
                  extend them in its discretion after that date.</xhtml:span></xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630700_247"
          xlink:to="footnote_851177102"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630700_248"
          xlink:label="id_footnote_elem_851630700_248"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630700_248"
          xlink:to="footnote_851177102"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630700_249"
          xlink:label="id_footnote_elem_851630700_249"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630700_249"
          xlink:to="footnote_851177102"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630700_250"
          xlink:label="id_footnote_elem_851630700_250"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630700_250"
          xlink:to="footnote_851177102"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630700_251"
          xlink:label="id_footnote_elem_851630700_251"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630700_251"
          xlink:to="footnote_851177102"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851630987_360"
          xlink:label="id_footnote_elem_851630987_360"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851630987_360"
          xlink:to="footnote_418130955"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503744_376"
          xlink:label="id_footnote_elem_851503744_376"
          xlink:type="locator"/>
        <link:footnote id="footnote_851210568" xlink:label="footnote_851210568" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i>Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class
                  M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503744_376"
          xlink:to="footnote_851210568"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503744_378"
          xlink:label="id_footnote_elem_851503744_378"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503744_378"
          xlink:to="footnote_851210568"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503744_380"
          xlink:label="id_footnote_elem_851503744_380"
          xlink:type="locator"/>
        <link:footnote id="footnote_851210569" xlink:label="footnote_851210569" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(b)</xhtml:sup><xhtml:i>On Class C shares redeemed less than one year after purchase. </xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503744_380"
          xlink:to="footnote_851210569"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_384"
          xlink:label="id_footnote_elem_851503749_384"
          xlink:type="locator"/>
        <link:footnote id="footnote_848919197" xlink:label="footnote_848919197" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i><xhtml:span class="redline">The management fee is comprised of a basic fee of 0.53% adjusted up or down by a maximum of 0.20% based on the fund's performance
                  relative to that of the Russell Midcap<xhtml:sup>&#xae;</xhtml:sup> Value Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.</xhtml:span></xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_384"
          xlink:to="footnote_848919197"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_385"
          xlink:label="id_footnote_elem_851503749_385"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_385"
          xlink:to="footnote_848919197"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_386"
          xlink:label="id_footnote_elem_851503749_386"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_386"
          xlink:to="footnote_848919197"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_387"
          xlink:label="id_footnote_elem_851503749_387"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_387"
          xlink:to="footnote_848919197"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_388"
          xlink:label="id_footnote_elem_851503749_388"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_388"
          xlink:to="footnote_848919197"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_405"
          xlink:label="id_footnote_elem_851503749_405"
          xlink:type="locator"/>
        <link:footnote id="footnote_850851305" xlink:label="footnote_850851305" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(b)</xhtml:sup><xhtml:i><xhtml:span class="redline">Fidelity Management &amp; Research Company LLC (FMR) has contractually agreed to reimburse Class C and Class Z of the fund to
                  the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent Trustees,
                  proxy and shareholder meeting expenses, extraordinary expenses, and acquired fund fees and expenses (including fees and expenses
                  associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions and fees
                  and expenses associated with the fund's securities lending program, if applicable), as a percentage of their respective average
                  net assets, exceed 1.90% and 0.75% (the Expense Caps). If at any time during the current fiscal year expenses for Class C
                  and Class Z of the fund fall below the Expense Caps, FMR reserves the right to recoup through the end of the fiscal year any
                  expenses that were reimbursed during the current fiscal year up to, but not in excess of, the Expense Caps. These arrangements
                  will remain in effect through February 29, 2024 . FMR may not terminate these arrangements before the expiration date without the approval of the Board of Trustees and may
                  extend them in its discretion after that date.</xhtml:span></xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_405"
          xlink:to="footnote_850851305"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_406"
          xlink:label="id_footnote_elem_851503749_406"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_406"
          xlink:to="footnote_850851305"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_407"
          xlink:label="id_footnote_elem_851503749_407"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_407"
          xlink:to="footnote_850851305"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_408"
          xlink:label="id_footnote_elem_851503749_408"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_408"
          xlink:to="footnote_850851305"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851503749_409"
          xlink:label="id_footnote_elem_851503749_409"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851503749_409"
          xlink:to="footnote_850851305"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#id_footnote_elem_851504044_518"
          xlink:label="id_footnote_elem_851504044_518"
          xlink:type="locator"/>
        <link:footnote id="footnote_323920962" xlink:label="footnote_323920962" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:p style="font: 11px Arial, Helvetica, sans-serif;"><xhtml:sup>(a)</xhtml:sup><xhtml:i>Since inception February 1, 2017.</xhtml:i></xhtml:p></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="id_footnote_elem_851504044_518"
          xlink:to="footnote_323920962"
          xlink:type="arc"/>
    </link:footnoteLink>
</xbrl>
