<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  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:specialized="http://www.vanguard.com/20230525"
  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="specialized-20230525.xsd" xlink:type="simple"/>
    <context id="D_25May2023_25May2023">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322_C000135474">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000135474Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000135474Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000135474Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322_SplicedSPUSDividendGrowersIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SplicedSPUSDividendGrowersIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322_SPUSDividendGrowersIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SPUSDividendGrowersIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_C000031350">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000031350Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_C000031350_BasedonNAVMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:BasedonNAVMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000031350Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000031350Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000031350Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_C000031350_BasedonMarketPriceMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:BasedonMarketPriceMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000031350Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_SplicedSPUSDividendGrowersIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SplicedSPUSDividendGrowersIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_SPUSDividendGrowersIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SPUSDividendGrowersIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000011322Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920_C000008004">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008004Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008004Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008004Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920_DividendGrowthSplicedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DividendGrowthSplicedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920_SPUSDividendGrowersIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SPUSDividendGrowersIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002920_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002920Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_C000008005">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008005Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_C000008006">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008006Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008005Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008005Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_SplicedEnergyIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SplicedEnergyIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_MSCIACWIEnergyplusUtilitiesIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIACWIEnergyplusUtilitiesIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002921_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002921Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923_C000008009">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008009Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008009Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008009Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923_SplicedGlobalCapitalCyclesIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SplicedGlobalCapitalCyclesIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923_SPGlobalBMIMetalsandMining25PercentWeightedIndexUSDCustomMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:SPGlobalBMIMetalsandMining25PercentWeightedIndexUSDCustomMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002923_MSCIACWIIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002923Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIACWIIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000065529">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000065529Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000065529_C000211922">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000065529Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000211922Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000065529_C000211921">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000065529Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000211921Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000065529_C000211922_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000065529Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000211922Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000065529_C000211922_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000065529Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000211922Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000065529_FTSEAllWorldIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000065529Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:FTSEAllWorldIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922_C000008007">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008007Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922_C000008008">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008008Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008007Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008007Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922_MSCIACWIHealthCareIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIACWIHealthCareIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="RetailMember_S000002922_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:RetailMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002922Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924_C000008010">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008010Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008010Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008010Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924_RealEstateSplicedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:RealEstateSplicedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIUSInvestableMarketRealEstate2550IndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InvestorMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InvestorMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924_C000008011">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008011Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008011Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008011Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924_RealEstateSplicedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:RealEstateSplicedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIUSInvestableMarketRealEstate2550IndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="AdmiralMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:AdmiralMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924_C000008012">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008012Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008012Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000008012Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924_RealEstateSplicedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:RealEstateSplicedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIUSInvestableMarketRealEstate2550IndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="InstitutionalMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:InstitutionalMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_C000032424">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000032424Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_C000032424_BasedonNAVMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:BasedonNAVMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000032424Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000032424Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:ReturnAfterTaxesonDistributionsandSaleofFundSharesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000032424Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_C000032424_BasedonMarketPriceMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:BasedonMarketPriceMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">specialized:C000032424Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_RealEstateSplicedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:RealEstateSplicedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:MSCIUSInvestableMarketRealEstate2550IndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <context id="ETFMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000734383</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">specialized:ETFMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">specialized:S000002924Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">specialized:DowJonesUSTotalStockMarketFloatAdjustedIndexMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2023-05-25</startDate>
            <endDate>2023-05-25</endDate>
        </period>
    </context>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <rr:PerformanceTableOneClassOfAfterTaxShown
      contextRef="AdmiralMember_S000002924"
      id="x_8cc9818d-41c8-4638-8414-1bf085e9162c"/>
    <rr:PerformanceTableOneClassOfAfterTaxShown
      contextRef="InvestorMember_S000002924"
      id="x_0193babf-8c07-40ee-ab7e-92a08cc8c389"/>
    <rr:PerformanceAvailabilityWebSiteAddress contextRef="InvestorMember_S000002920" id="x_70">vanguard.com/performance</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone contextRef="InvestorMember_S000002920" id="x_71">
  800-662-7447</rr:PerformanceAvailabilityPhone>
    <dei:DocumentPeriodEndDate contextRef="D_25May2023_25May2023" id="apid_1">2023-01-31</dei:DocumentPeriodEndDate>
    <dei:EntityCentralIndexKey contextRef="D_25May2023_25May2023" id="apid_2">0000734383</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="D_25May2023_25May2023" id="apid_3">false</dei:AmendmentFlag>
    <dei:DocumentCreationDate contextRef="D_25May2023_25May2023" id="apid_4">2023-05-25</dei:DocumentCreationDate>
    <rr:ProspectusDate contextRef="D_25May2023_25May2023" id="apid_5">2023-05-25</rr:ProspectusDate>
    <dei:DocumentType contextRef="D_25May2023_25May2023" id="apid_6">485BPOS</dei:DocumentType>
    <rr:YearToDateReturnLabel
      contextRef="AdmiralMember_S000002924_C000008011"
      id="x_448440e4-03c2-4030-9e90-75a560ba1121">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="AdmiralMember_S000002924_C000008011"
      id="x_87753782-0b9d-4fe6-8bae-11d6642fa327">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="InstitutionalMember_S000002924_C000008012"
      id="x_4e0ccdf1-c1bc-4bb6-99b2-be372420baa4">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="InstitutionalMember_S000002924_C000008012"
      id="x_0deb5063-4540-4f1f-9403-43ce9e494dd8">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="ETFMember_S000002924_C000032424"
      id="ce0e00bb-e7c4-48dd-8a2a-dd8ed24833d7">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="ETFMember_S000002924_C000032424"
      id="f1fdf758-6649-4e08-bea4-ac09eabef913">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="InvestorMember_S000002924_C000008010"
      id="x_0fe2b7bb-cf51-4cb6-8307-e897480594b1">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="InvestorMember_S000002924_C000008010"
      id="d33ea1ef-fec8-48f7-9ccf-50e1cd6f3703">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="AdmiralMember_S000011322_C000135474"
      id="dd10aab0-b61a-471a-8e6e-5b75ed43f3c7">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="AdmiralMember_S000011322_C000135474"
      id="x_92c91bbe-a6c8-453c-8c46-881aae46e9e0">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="ETFMember_S000011322_C000031350"
      id="ad2cc7f8-3b69-4c48-814f-799dc6914d5c">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="ETFMember_S000011322_C000031350"
      id="x_40672bb9-4149-4b58-869c-9ba6288f8239">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="RetailMember_S000065529_C000211922"
      id="f5d743db-8d65-4a46-8d54-fe5b9ff24282">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="RetailMember_S000065529_C000211922"
      id="x_334551c9-6175-455a-a9b9-20810d9e5101">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="RetailMember_S000002923_C000008009"
      id="aadd09fd-d6b1-4b32-9f37-2d1a97648b14">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="RetailMember_S000002923_C000008009"
      id="x_0ae09ac7-f5f3-4650-8709-623b843416de">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="RetailMember_S000002921_C000008005"
      id="x_517236ec-aa86-4773-a4a1-f688d990e92a">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="RetailMember_S000002921_C000008005"
      id="c14b9268-d2d9-4835-b9e9-1876d91453ee">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="InvestorMember_S000002920_C000008004"
      id="x_8197af33-0ea6-410c-93f8-7706b31ce008">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="InvestorMember_S000002920_C000008004"
      id="x_0e1ee101-c5aa-47d3-a873-2b4d39b247e1">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:YearToDateReturnLabel
      contextRef="RetailMember_S000002922_C000008007"
      id="b75f97ef-1fa1-4be5-bc59-855fd0de6491">year-to-date return</rr:YearToDateReturnLabel>
    <rr:BarChartYearToDateReturnDate
      contextRef="RetailMember_S000002922_C000008007"
      id="x_15ee26fa-8dad-45ac-8795-90b8ef69f7a7">2023-03-31</rr:BarChartYearToDateReturnDate>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000011322_SPUSDividendGrowersIndexMember"
      id="ef99cf80-c62f-42ab-8870-baf043670c47"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnSinceInception
      contextRef="AdmiralMember_S000011322_SPUSDividendGrowersIndexMember"
      id="x_331db184-0f41-490b-8175-726488745290"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_SPUSDividendGrowersIndexMember"
      id="x_63ec0426-89c4-46c8-9542-31fbe61e7f10"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_SPUSDividendGrowersIndexMember"
      id="x_739b520d-4c34-492e-aa34-84893a8ccbce"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002920_SPUSDividendGrowersIndexMember"
      id="x_7aac1657-f5e5-477d-87f8-b40f48a77721"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002920_SPUSDividendGrowersIndexMember"
      id="x_89538881-95d1-4f8b-9cbe-094b9fbd38eb"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_MSCIACWIEnergyplusUtilitiesIndexMember"
      id="x_65d09d7b-a701-4e12-821b-567a4ee87623"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_MSCIACWIEnergyplusUtilitiesIndexMember"
      id="x_7eb21577-3fc3-44f8-a651-9aad9c381e79"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002923_SPGlobalBMIMetalsandMining25PercentWeightedIndexUSDCustomMember"
      id="x_33d51205-40a6-4774-bf27-dd4d2f8d77c5"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002923_SPGlobalBMIMetalsandMining25PercentWeightedIndexUSDCustomMember"
      id="x_575ad957-a52e-4679-9d5a-85530c0ca9e3"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:PortfolioTurnoverRate
      contextRef="InvestorMember_S000002924"
      decimals="4"
      id="bc9044c9-441e-425b-9f45-76943868063a"
      unitRef="pure">0.0700</rr:PortfolioTurnoverRate>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      id="eda58b2f-5638-4ede-b91b-9f9d039e786b"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:PortfolioTurnoverRate
      contextRef="AdmiralMember_S000002924"
      decimals="4"
      id="x_08b060cb-1112-49f8-b9d8-d396077971e9"
      unitRef="pure">0.0700</rr:PortfolioTurnoverRate>
    <rr:AverageAnnualReturnYear10
      contextRef="AdmiralMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      id="c46b7e68-66d3-4572-9eb3-334ed61cff83"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:PortfolioTurnoverRate
      contextRef="InstitutionalMember_S000002924"
      decimals="4"
      id="f0ec9f1f-8577-44e5-b525-eb2db763b773"
      unitRef="pure">0.0700</rr:PortfolioTurnoverRate>
    <rr:AverageAnnualReturnYear10
      contextRef="InstitutionalMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      id="e348cf98-f7fb-470c-875e-2bdd0db2f09f"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:PortfolioTurnoverRate
      contextRef="ETFMember_S000002924"
      decimals="4"
      id="x_07da8870-9e27-4c43-b9df-116ea4794795"
      unitRef="pure">0.0700</rr:PortfolioTurnoverRate>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      id="fe752f9e-3441-4dbe-abda-ef9b256cc834"
      unitRef="pure"
      xsi:nil="true"/>
    <rr:AnnualReturn2013
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="b2870194-16d9-463d-8cdc-4451bbb3bd44"
      unitRef="pure">0.0242</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_9e65a808-f7dd-44eb-a20d-838d593d250b"
      unitRef="pure">0.3032</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_9de0c6cb-0a7f-44b5-ad35-44bc543f3933"
      unitRef="pure">0.0239</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_2aea16b8-6db1-42c7-a8ee-5809fd636a73"
      unitRef="pure">0.0850</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_1e9e697a-f418-4894-a1b2-f80984a7b763"
      unitRef="pure">0.0494</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_7ee20dcd-0d64-4fd5-98f2-640870ebfef8"
      unitRef="pure">-0.0595</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_409dc181-5d27-401b-a954-d8ca38ffdbd8"
      unitRef="pure">0.2894</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_17b5207b-5f66-4299-a027-6fe9b29f3319"
      unitRef="pure">-0.0465</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="dbaf4e6c-9dd3-4c1d-9230-62ee8592a5c4"
      unitRef="pure">0.4040</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_6de2504f-2e98-4477-8163-a776cd64b04b"
      unitRef="pure">-0.2620</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="dfc5c241-66d1-4624-8f56-ad019e10662a"
      unitRef="pure">0.0180</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="a20aa94a-0a63-4c2b-aa68-a5ca1f87fcc5"
      unitRef="pure">0.0248</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_8fa7b70e-8d28-4f50-9f51-0e3c1bb0ba0f"
      unitRef="pure">0.3028</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_01877cd7-2c4f-49a4-adb5-502550b3c3e8"
      unitRef="pure">0.0245</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="de6f585f-c5af-4b5c-90dd-8e43d13e5177"
      unitRef="pure">0.0851</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_88b90883-41ec-4cfd-9326-d0d44f1eb8d3"
      unitRef="pure">0.0493</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_98aa42ce-342b-4b17-bc62-da24d560d6e3"
      unitRef="pure">-0.0593</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="e5168ad4-2df3-446d-b951-d5e9a0923191"
      unitRef="pure">0.2902</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_2f7af266-6d5d-4d56-9b08-272837fe25e4"
      unitRef="pure">-0.0467</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_38a76d98-a86d-426d-b96c-44fbb34d596b"
      unitRef="pure">0.4041</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_25d136b5-1e46-45bd-956d-fdecc41c6ce0"
      unitRef="pure">-0.2617</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="ed8e6474-104e-46c5-a7a7-9966bda5b6d4"
      unitRef="pure">0.0179</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_63986944-ed6f-4785-9878-d7616ea21d20"
      unitRef="pure">0.0242</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="de0e3a35-3840-4a56-9fbd-0a0372039fc4"
      unitRef="pure">0.3029</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_2eb0e78a-abb0-4193-a55c-9d554e29afc8"
      unitRef="pure">0.0237</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_718c8594-2f61-4b12-a45d-14ddf117aae3"
      unitRef="pure">0.0853</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="f025fc7b-622f-4463-80d6-90ed3127d9de"
      unitRef="pure">0.0495</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_8d3bdb4f-55cc-4529-8620-6955129ecaa2"
      unitRef="pure">-0.0595</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_9fbfe600-6bbe-46c6-b99a-26ba1ae174b1"
      unitRef="pure">0.2891</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_72b40163-fcf7-4118-aeca-d56d93acfa65"
      unitRef="pure">-0.0472</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_21abdd8c-22b9-43ee-9165-bdac44a7830c"
      unitRef="pure">0.4038</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_4e6f2116-4c65-4aae-b7bc-6169892e20e7"
      unitRef="pure">-0.2620</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="a6c817e3-ceb6-493b-b8c0-49fc91faf2dd"
      unitRef="pure">0.0177</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="a3e51333-8e5d-4142-8cc2-4d9661681b68"
      unitRef="pure">0.0231</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_593f10c4-1934-4e3d-ba6c-dd2a5649e479"
      unitRef="pure">0.3013</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_1b4b7b4c-18ad-430b-a96a-0ee20680b93a"
      unitRef="pure">0.0222</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_7ec25bec-960c-4a40-8c63-1e6abbdc47aa"
      unitRef="pure">0.0834</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_01df45d2-6137-4075-b0f9-42e10136de19"
      unitRef="pure">0.0483</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="a21c62fc-31f0-4f0b-8918-9dfa68547d0e"
      unitRef="pure">-0.0611</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_55ad5382-52dd-417f-aa75-03d8346275c9"
      unitRef="pure">0.2878</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_8f73c9bc-fa88-42fc-9e7d-fd3706c9d3d4"
      unitRef="pure">-0.0478</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_2008136f-4296-469d-ad7a-f0a452e7a529"
      unitRef="pure">0.4019</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_8d7ff59d-9984-43d1-b95f-7b26791343ea"
      unitRef="pure">-0.2630</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="fd653279-bdc4-48ea-b735-f6954fee84f4"
      unitRef="pure">0.0173</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2014
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_784dd5fb-c67f-4361-bace-9b2164cc9e74"
      unitRef="pure">0.1004</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_3b3f8045-6c6a-4e30-976a-a79222d38b87"
      unitRef="pure">-0.0193</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_8415f0c1-0a88-4a49-af94-091280b66927"
      unitRef="pure">0.1179</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="d272f6fc-5d26-4a76-bcd7-8ba9c4c2bd71"
      unitRef="pure">0.2222</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="bf5a6f2c-c0fe-49ba-a91a-e75e7a5c905d"
      unitRef="pure">-0.0203</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="cbf83f1a-3613-42fa-b93f-e5fe6a1e5ed5"
      unitRef="pure">0.2968</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="d88b873a-5bb5-43f9-87cd-9f2bfaea4363"
      unitRef="pure">0.1546</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_7661b0d3-4431-4256-84ed-48874c83a14c"
      unitRef="pure">0.2362</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="d0a4b2fc-40c4-47fa-8af9-3e7be4690905"
      unitRef="pure">-0.0980</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_2c782587-910f-4c92-92ff-9a1dd4813e6f"
      unitRef="pure">0.0194</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="a427b5fc-2925-4217-9c6a-3b7043119c19"
      unitRef="pure">0.2899</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_6ca9dfd5-7cc7-4402-a783-44f38eb070d7"
      unitRef="pure">0.1006</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="a8cb5f88-799d-472e-a2d6-f1a533577035"
      unitRef="pure">-0.0195</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="c0a080d0-24db-4f57-bf34-68726874beb7"
      unitRef="pure">0.1184</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_0439c8a2-2c45-41b4-9dfd-7a064f7dffd8"
      unitRef="pure">0.2222</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="fc8d9a22-c7ca-4ca8-b625-0e7f2a3a413e"
      unitRef="pure">-0.0202</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_59f7987a-33f9-4263-b805-d4be8fa0eb1e"
      unitRef="pure">0.2971</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="d952d98c-24c4-4a9e-bb9c-18b672523859"
      unitRef="pure">0.1546</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_7100db9b-9715-405c-a02a-3c2c945bc801"
      unitRef="pure">0.2364</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_2d587cf2-33f6-4f22-acdf-b903a60f7637"
      unitRef="pure">-0.0979</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_17734433-4a7a-4713-b931-0baefff9777f"
      unitRef="pure">0.0193</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2020
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_344ff2d8-82da-43c7-960f-9cb8dc4f0fdc"
      unitRef="pure">0.1931</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="d46e82aa-085f-4d41-a902-c1803c1b8202"
      unitRef="pure">0.2220</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_8ada0303-fa64-4853-b9c4-033eb9106193"
      unitRef="pure">-0.1084</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_6cbef660-ae6f-4008-a617-9f820065b545"
      unitRef="pure">0.0689</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_4b15f4c6-2977-4e7b-9319-03faa27ecf3b"
      unitRef="pure">-0.3513</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_543673e8-72de-401a-8eda-0c14b88c8025"
      unitRef="pure">-0.1141</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="e6c1eaf1-0f8e-4a3f-9674-dc71a1ce3eba"
      unitRef="pure">-0.2942</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_350c93ff-c456-48ac-9b14-fcb0b9e2e431"
      unitRef="pure">0.5064</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="d4cce325-11dc-4633-a048-5384a880add3"
      unitRef="pure">0.1375</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="f51c7050-abf0-465c-b0f2-aeaef54f9267"
      unitRef="pure">-0.3227</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_99929ad2-afbb-49c7-bc98-3d7f1e1ce1ef"
      unitRef="pure">0.2066</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_44179d77-fe15-4557-8062-eca010e1732c"
      unitRef="pure">0.1721</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_52b2d826-2d63-4f05-a397-a712adde1fe7"
      unitRef="pure">0.1949</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_7cfccb71-468a-4df6-9a2b-b1fce5f36d08"
      unitRef="pure">0.0739</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_1224fa00-c978-49eb-a029-50adaedd8f7e"
      unitRef="pure">0.0528</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_0cfc325e-1a0b-49cd-ac20-6a8e83f70823"
      unitRef="pure">0.1814</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="d1ff414d-f79a-4106-a570-366655e28cbc"
      unitRef="pure">-0.1426</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_58840850-31c2-4ba8-b298-47318fadb7c7"
      unitRef="pure">-0.2150</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_3659a6f5-2ba4-4367-9dd0-2ce2a3081e3c"
      unitRef="pure">0.3310</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_9a8bc5ad-7e1d-44f7-9a6e-4f8b37f2a300"
      unitRef="pure">0.0317</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_9a65c88d-5f62-4e06-8c6a-a19d2cbb0604"
      unitRef="pure">-0.1715</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_1f700cba-3b13-43a0-9fa1-5253158c73d1"
      unitRef="pure">0.1320</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="d43ec144-251d-4fb6-bf72-95087559e8e4"
      unitRef="pure">-0.3084</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_7d27151c-7b58-46d6-bab1-3c1036e8b316"
      unitRef="pure">0.2771</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="de513017-261b-40fe-b787-df725538c10f"
      unitRef="pure">0.2369</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="a538a244-cc65-432d-ae2c-a01e277ce7a3"
      unitRef="pure">-0.0116</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="e8c7bd15-8a30-43ec-bba9-d1b0e97ececc"
      unitRef="pure">0.3153</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="af698449-a4c2-452f-b4f4-d183bba295b3"
      unitRef="pure">0.1185</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_464a317c-6a81-433a-9172-5fd7fbfe8972"
      unitRef="pure">0.0262</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="b68895ad-4f0a-44db-8277-64fbc5caac9c"
      unitRef="pure">0.0753</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_98c4d474-2dab-4ff6-b7ea-ef1f3688e864"
      unitRef="pure">0.1933</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_18d44977-d178-40dd-a540-cce5078fe65d"
      unitRef="pure">0.0018</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_372972a2-b6f2-4412-89ab-91f591b7fcf8"
      unitRef="pure">0.3095</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="f44e33a5-156c-40ca-b968-d21ed96b3212"
      unitRef="pure">0.1206</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_73db9925-7f89-4855-8603-d919f84fa5f9"
      unitRef="pure">0.2484</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="f066043b-aefe-42e9-bee8-b2c1b8031094"
      unitRef="pure">-0.0488</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="ff491018-2065-4032-8817-19d5731fbe56"
      unitRef="pure">0.0013</rr:BarChartYearToDateReturn>
    <rr:AnnualReturn2013
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="b27dd870-a756-422f-8723-d09d2a7b4603"
      unitRef="pure">0.4319</rr:AnnualReturn2013>
    <rr:AnnualReturn2014
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_4e71c896-a42b-4dc8-a146-0aa261e9e6d4"
      unitRef="pure">0.2852</rr:AnnualReturn2014>
    <rr:AnnualReturn2015
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_6bc37e60-aefe-4f4e-9b7a-1be5f9f08681"
      unitRef="pure">0.1265</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_80ac3263-991c-49b6-8d39-7019cae237bf"
      unitRef="pure">-0.0899</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="b96638a0-7b16-43b2-9ce2-4f3ea018879c"
      unitRef="pure">0.1961</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="ea3b7eab-25c0-4b23-a69e-27820c8ed856"
      unitRef="pure">0.0115</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_94d2324a-7456-463c-942b-342bb8f6da5a"
      unitRef="pure">0.2293</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_0ebd5f95-e719-429a-8148-ad28b8c7f4ef"
      unitRef="pure">0.1262</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_600c79b6-ba93-4d68-a7d5-8956ae2b3329"
      unitRef="pure">0.1430</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_6a4962a6-e419-4fa0-b960-e1f5b8acaa47"
      unitRef="pure">-0.0105</rr:AnnualReturn2022>
    <rr:BarChartYearToDateReturn
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_2a66c36d-759b-40ea-8c43-5820b4d4d522"
      unitRef="pure">-0.0059</rr:BarChartYearToDateReturn>
    <dei:EntityInvCompanyType
      contextRef="D_25May2023_25May2023"
      id="apid_e9fdd536-6ab9-463d-a98d-137cc9703f11">N-1A</dei:EntityInvCompanyType>
    <dei:EntityRegistrantName
      contextRef="D_25May2023_25May2023"
      id="apid_01ec35c0-35b4-4176-8a09-316b3734e64c">VANGUARD SPECIALIZED FUNDS</dei:EntityRegistrantName>
    <dei:DocumentEffectiveDate
      contextRef="D_25May2023_25May2023"
      id="apid_ee535e97-79c2-49f8-b3a5-1e997b23bec5">2023-05-25</dei:DocumentEffectiveDate>
    <rr:RiskReturnHeading
      contextRef="AdmiralMember_S000011322"
      id="x_9687c513-d2c2-4425-af7c-2cd93b279972">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="AdmiralMember_S000011322"
      id="cd509922-0684-4b0e-a09f-b14242e4d188">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="AdmiralMember_S000011322"
      id="x_80e6471f-cdda-47f7-ae65-3d3b1270b8cb">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to track the performance of a benchmark index that measures the investment return of common stocks of companies that have a record of increasing dividends over time.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="AdmiralMember_S000011322"
      id="x_38c93347-0f57-41f3-8de0-3b1f071c4872">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="AdmiralMember_S000011322"
      id="x_41340edb-32eb-4943-b9a4-160e9d52ff08">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Admiral Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="AdmiralMember_S000011322"
      id="x_4448023e-f087-41f5-b37e-9da1a2b0025d">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_32449b69-3636-4779-b39a-14ce9e6902b0"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_6a37b1ef-6320-4615-9a1d-f2e0f6214fe0"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_06693c72-2aa1-43cb-a6b3-7b83a818f4d4"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="bf586161-60e6-414d-bfa1-6d255fe34e35"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="INF"
      id="e3b6a159-091f-4a18-854e-a956a625c295"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="AdmiralMember_S000011322"
      id="x_1a4e91ac-afc0-46a5-bb6f-8a1843fc2a15">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="f0a33348-69d8-4875-868e-db97d138ba05"
      unitRef="pure">0.0007</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="fbc295aa-fbb2-48a4-a68d-eb7befbc65cf"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_858a6581-07c8-46b6-9534-bf2fa9292fd2"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_31de8ca7-8b7e-42b1-8f07-4be379ae2b58"
      unitRef="pure">0.0008</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="AdmiralMember_S000011322"
      id="e1edf7eb-3ee8-4cf6-8ded-2f69d4854273">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="AdmiralMember_S000011322"
      id="a07960d2-33a9-4d1a-9525-8f39f993dc95">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund&#x2019;s Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="INF"
      id="d400f276-e153-4126-a611-dad978429ab5"
      unitRef="USD">8</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="INF"
      id="fbfc47fa-b3e5-44cf-a443-648e69d3ebff"
      unitRef="USD">26</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="INF"
      id="dac80bde-e48b-4e78-9b68-605e0cf08208"
      unitRef="USD">45</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="INF"
      id="c012bc5b-fd3a-4c98-91a6-871a2048a23a"
      unitRef="USD">103</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="AdmiralMember_S000011322"
      id="x_6b4d573d-f4ca-4424-aedb-14a0c80d1758">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="AdmiralMember_S000011322"
      id="x_69242b80-1bf9-45e4-a552-3311bd72433f">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;12&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="AdmiralMember_S000011322"
      decimals="4"
      id="x_4a26e1d1-1b9b-4d36-959c-553496e5f839"
      unitRef="pure">0.12</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="AdmiralMember_S000011322"
      id="f8c58ad7-e7fb-4385-b489-e3c5b3cc3a31">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="AdmiralMember_S000011322"
      id="b45b010c-9df9-44ff-ba9e-927f24049799">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund employs an indexing investment approach designed to track the performance of the S&amp;amp;P U.S. Dividend Growers Index, which consists of common stocks of companies that have a record of increasing dividends over time. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="AdmiralMember_S000011322"
      id="x_5a8d3b6e-d20d-4e4b-9453-e7036158e49d">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="AdmiralMember_S000011322"
      id="x_0e91bd1c-71d5-478a-85a4-9614ebf5a3cb">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s target index tracks a subset of the U.S. stock market, which could cause the Fund to perform differently from the overall stock market. In addition, the Fund&#x2019;s target index may, at times, become focused in stocks of a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;particular market sector, which would subject the Fund to proportionately higher exposure to the risks of that sector.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from dividend-paying stocks will trail returns from the overall stock market. In addition, mid-capitalization stocks (to the extent that the Fund&#x2019;s assets are invested in mid-cap stocks) historically have been more volatile in price than the large-cap stocks that dominate the overall stock market. Dividend-paying stocks tend to go through cycles of doing better&#x2014;or worse&#x2014; than the stock market in general. These periods have, in the past, lasted for as long as several years.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Index replicating risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may be prevented from holding one or more securities in the same proportion as in its target index.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="AdmiralMember_S000011322"
      id="x_0001908a-3d3f-45ee-9628-dd69f5462385">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="AdmiralMember_S000011322"
      id="x_0f63dfb6-7370-4f1b-b09e-09fbb8a99749">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="AdmiralMember_S000011322"
      id="c3ad8bb4-64e8-4636-a410-a2d3feb7230f">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="AdmiralMember_S000011322"
      id="a3c20719-6357-4c10-8752-3b0ff5fbfdb9">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund&#x2018;s target index and other comparative indexes, which have investment characteristics similar to those of the Fund. The Spliced S&amp;amp;P U.S. Dividend Growers Index reflects the performance of the NASDAQ US Dividend Achievers Select Index through September 19, 2021, and the S&amp;amp;P U.S. Dividend Growers Index thereafter. &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt; Updated performance information is available on our &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;website at &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="AdmiralMember_S000011322"
      id="x_559f2405-c83e-4113-bfba-098513a85e12">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund&#x2018;s target index and other comparative indexes, which have investment characteristics similar to those of the Fund. The Spliced S&amp;amp;P U.S. Dividend Growers Index reflects the performance of the NASDAQ US Dividend Achievers Select Index through September 19, 2021, and the S&amp;amp;P U.S. Dividend Growers Index thereafter. &lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="AdmiralMember_S000011322"
      id="x_59a23dac-a5ea-4280-81b0-5dfac0eea518">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="AdmiralMember_S000011322"
      id="x_75b24407-5a4a-4d71-ae9a-88c60544f208">&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="AdmiralMember_S000011322"
      id="ae262d65-4948-4cf7-b4bd-2b8946b828c3">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="AdmiralMember_S000011322"
      id="x_655a923e-da4e-40f2-92d4-8e54cfa8ed91">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Dividend Appreciation Index Fund Admiral Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="AdmiralMember_S000011322"
      id="c6b80702-2e24-4bf5-8108-f24f91e959a2">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="AdmiralMember_S000011322_C000135474"
      id="x_2f841d20-aa4d-4084-9967-96ffcbd359b2">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_873216bb-0bdf-44ed-a2a9-d552880a333a"
      unitRef="pure">0.1397</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="AdmiralMember_S000011322_C000135474"
      id="f665ad1f-fe5e-448c-a250-64ec4730c119">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="AdmiralMember_S000011322_C000135474"
      id="x_0239c284-472c-42c0-8ef7-38799046f061">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_28120cac-ab64-4f71-9e3d-a4790b1a3cb6"
      unitRef="pure">-0.1677</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="AdmiralMember_S000011322_C000135474"
      id="x_2e105414-47f8-48ec-84da-6b344d8f2f9d">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="AdmiralMember_S000011322"
      id="dee7c4f0-5ba7-4f2c-9f7f-7d5852ad7975">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnInceptionDate
      contextRef="AdmiralMember_S000011322_C000135474"
      id="f2ba80ee-2dff-495b-9056-ed060b9a8fae">2013-12-19</rr:AverageAnnualReturnInceptionDate>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_67e9ba64-65b8-4dff-bb88-c263f8777fba"
      unitRef="pure">-0.0980</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_90ff5851-4690-44f7-87f8-e6f26ad499e7"
      unitRef="pure">0.1034</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnSinceInception
      contextRef="AdmiralMember_S000011322_C000135474"
      decimals="4"
      id="x_5dfdd814-555b-421e-9a63-9ee102352d44"
      unitRef="pure">0.1050</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="fd584ea6-bbdb-4c28-9377-a9d680d48d85"
      unitRef="pure">-0.1022</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_46679f66-2d8a-451a-b4d3-aae316b16fd4"
      unitRef="pure">0.0985</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnSinceInception
      contextRef="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_62f76094-9c6c-46e0-a999-9f477f11a384"
      unitRef="pure">0.0998</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_0463e688-d32b-4b4e-b101-00c2cfecdbf7"
      unitRef="pure">-0.0552</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_3f60d2e5-ceae-4449-880a-283647b214b3"
      unitRef="pure">0.0814</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnSinceInception
      contextRef="AdmiralMember_S000011322_C000135474_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_5389ff67-76df-415d-b93e-da6893f54c19"
      unitRef="pure">0.0849</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000011322_SplicedSPUSDividendGrowersIndexMember"
      decimals="4"
      id="x_7b84d8d4-20b9-40e8-a0e9-965df630009d"
      unitRef="pure">-0.0970</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000011322_SplicedSPUSDividendGrowersIndexMember"
      decimals="4"
      id="x_91c99b6e-734b-4d02-9dd3-b5941fdce862"
      unitRef="pure">0.1043</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnSinceInception
      contextRef="AdmiralMember_S000011322_SplicedSPUSDividendGrowersIndexMember"
      decimals="4"
      id="x_6c9ae1d6-a661-4e93-93f9-a2409fe62778"
      unitRef="pure">0.1058</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000011322_SPUSDividendGrowersIndexMember"
      decimals="4"
      id="x_8c2028b0-d02c-418e-872d-857dd006a2ae"
      unitRef="pure">-0.0970</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_401253f2-89c9-4f93-bbca-e66ff98b8009"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_26b802a6-d0a2-4551-b44d-7e84aaf9afbf"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnSinceInception
      contextRef="AdmiralMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="ee09ba5c-3db9-4b27-b0e8-9cf91f919ac6"
      unitRef="pure">0.1013</rr:AverageAnnualReturnSinceInception>
    <rr:PerformanceTableClosingTextBlock
      contextRef="AdmiralMember_S000011322"
      id="ffc6dbc8-9a4e-43d2-9e08-18bee85e2a90">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="AdmiralMember_S000011322"
      id="d8ac05c5-64bb-49e5-b9dc-2b41792996ca">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="AdmiralMember_S000011322"
      id="x_373be48b-cd8b-488e-95e9-1429d7694e81">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="AdmiralMember_S000011322"
      id="x_8922c3d6-f3a3-42a2-b87a-128f401aa6a1">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="ETFMember_S000011322"
      id="a91870fc-b343-4f4c-80c0-d4d864edfeef">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;ETF Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="ETFMember_S000011322"
      id="x_039cc929-23fd-4e74-a714-acc927cc9aef">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="ETFMember_S000011322"
      id="c1603eac-c552-4bd8-864b-e3c74996014f">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to track the performance of a benchmark index that measures the investment return of common stocks of companies that have a record of increasing dividends over time.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="ETFMember_S000011322"
      id="x_6eb67ed9-6b9c-469f-a4a1-bc20734e3e2b">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="ETFMember_S000011322"
      id="x_8ec16a6a-4648-4645-a5b3-dba7c8b27537">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell ETF Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="ETFMember_S000011322"
      id="x_7c63418d-3941-4cba-aeb4-f658c7104281">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <specialized:TransactionFeeOnPurchasesandSales
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="x_005947b6-895c-4c53-b99d-fe0bf8b93aca"
      unitRef="USD">0</specialized:TransactionFeeOnPurchasesandSales>
    <specialized:TransactionFeeOnReinvestedDividends
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="x_8a678d6a-f963-4c53-b78b-723495a52a98"
      unitRef="USD">0</specialized:TransactionFeeOnReinvestedDividends>
    <specialized:TransactionFeeOnConversionToETFShares
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="x_3f467c3b-3c08-4b14-a37a-12df55a0bf7c"
      unitRef="USD">0</specialized:TransactionFeeOnConversionToETFShares>
    <rr:OperatingExpensesCaption
      contextRef="ETFMember_S000011322"
      id="x_3cac1993-3a49-4bbc-be9d-501f7a45beb0">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="x_41f17b79-7de5-4610-9ede-3f0225754568"
      unitRef="pure">0.0005</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="f281a794-3c7a-4d6f-92d0-5439f8b5a8ce"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="ab28f8bf-5abc-4f6f-99a4-5146a32fbca0"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="c0d7b57f-be59-45d5-82b8-b8d8d4df29fc"
      unitRef="pure">0.0006</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="ETFMember_S000011322"
      id="a1ca23a3-2afb-448c-ae93-bfff18c624e9">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="ETFMember_S000011322"
      id="ccc0aac5-7fb6-46ce-874f-0acb3fbfe807">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund&#x2019;s ETF Shares with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to sell your shares at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="x_9f7312e7-0fb7-4a77-902f-d7877aa9cd62"
      unitRef="USD">6</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="df1ddd0e-dd11-4eb2-a994-aedf4ecd9841"
      unitRef="USD">19</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="x_5a721589-2a73-4ee6-9a2a-117f6f9423f3"
      unitRef="USD">34</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="ETFMember_S000011322_C000031350"
      decimals="INF"
      id="x_85b1976f-5fb9-42c8-b2de-88630f3b8bae"
      unitRef="USD">77</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleClosingTextBlock
      contextRef="ETFMember_S000011322"
      id="eabf621c-5038-4172-af9b-fa606d919292">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund.&lt;/span&gt;</rr:ExpenseExampleClosingTextBlock>
    <rr:PortfolioTurnoverHeading
      contextRef="ETFMember_S000011322"
      id="x_073c0727-e33c-4ab0-8ba9-84602e4ee30c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="ETFMember_S000011322"
      id="x_673af746-c354-427a-afae-0f34abc638d6">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;12&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="ETFMember_S000011322"
      decimals="4"
      id="x_7b9558f4-62ff-497e-af50-4193a846e0b5"
      unitRef="pure">0.12</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="ETFMember_S000011322"
      id="b59eb2df-84c7-4d0b-b071-d507b9caacf2">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="ETFMember_S000011322"
      id="c753ab2e-7719-4f46-afd0-ce3a0e032e67">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund employs an indexing investment approach designed to track the performance of the S&amp;amp;P U.S. Dividend Growers Index, which consists of common stocks of companies that have a record of increasing dividends over time. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="ETFMember_S000011322"
      id="c208f5fc-8370-4847-95bd-ff695c7f7638">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="ETFMember_S000011322"
      id="ac23b62d-7678-4ee9-a288-cbd199668678">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s target index tracks a subset of the U.S. stock market, which could cause the Fund to perform differently from the overall stock market. In addition, the Fund&#x2019;s target index may, at times, become focused in stocks of a particular market sector, which would subject the Fund to proportionately higher exposure to the risks of that sector.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from dividend-paying stocks will trail returns from the overall stock market. In addition, mid-capitalization stocks (to the extent that the Fund&#x2019;s assets are invested in mid-cap stocks) historically have been more volatile in price than the large-cap stocks that dominate the overall stock market. Dividend-paying stocks tend to go through cycles of doing better&#x2014;or worse&#x2014; than the stock market in general. These periods have, in the past, lasted for as long as several years.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Index replicating risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may be prevented from holding one or more securities in the same proportion as in its target index.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Because ETF Shares are traded on an exchange, they are subject to additional risks:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;The Fund&#x2019;s ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;Although the Fund&#x2019;s ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;Trading of the Fund&#x2019;s ETF Shares may be halted by the activation of individual or marketwide trading halts (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of the Fund&#x2019;s ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or for the protection of investors.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="ETFMember_S000011322"
      id="x_7967859a-d3cb-4e31-bc89-22e71fb35ec5">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="ETFMember_S000011322"
      id="x_9c0b6beb-c3b6-47de-9900-be21290c53b2">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="ETFMember_S000011322"
      id="x_24bde7e3-5b71-4c4a-806e-5483a04096a3">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="ETFMember_S000011322"
      id="d7e6de57-3f95-49cc-9b4b-ff9f641fce0c">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund. The Spliced S&amp;amp;P U.S. Dividend Growers Index reflects the performance of the NASDAQ US Dividend Achievers Select Index through September 19, 2021, and the S&amp;amp;P U.S. Dividend Growers Index thereafter. &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;Keep &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt; Updated performance &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;information is available on our website at &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="ETFMember_S000011322"
      id="d0b6d989-d39e-49fa-8862-38aa7cf6a281">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund. The Spliced S&amp;amp;P U.S. Dividend Growers Index reflects the performance of the NASDAQ US Dividend Achievers Select Index through September 19, 2021, and the S&amp;amp;P U.S. Dividend Growers Index thereafter. &lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="ETFMember_S000011322"
      id="x_226f8e99-e254-48f1-8c81-c6ed482f65f3">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;Keep &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="ETFMember_S000011322"
      id="f5615df5-5a09-443c-a2a8-de3e225d63c7">&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="ETFMember_S000011322"
      id="c6f7acd9-71b2-41af-a61a-4e91512216a5">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="ETFMember_S000011322"
      id="x_121f77bf-0f2d-4154-9330-9c50c3799bd3">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Dividend Appreciation Index Fund ETF Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="ETFMember_S000011322"
      id="f42a7ae3-6bfe-411c-ad8e-eeb43e04ad42">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="ETFMember_S000011322_C000031350"
      id="x_2d6f4678-ef11-40c6-8cfb-f51ae8cb1dfd">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="ed4b25ae-6b03-4de3-8323-dc671b31270b"
      unitRef="pure">0.1396</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="ETFMember_S000011322_C000031350"
      id="x_483b442b-7daa-43e8-accb-c06b850b1cb9">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="ETFMember_S000011322_C000031350"
      id="x_84c27eab-09ac-4fcc-8e40-6fcf7d41abc3">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="ETFMember_S000011322_C000031350"
      decimals="4"
      id="f51ad0fb-fc0e-4751-93f9-127279ff246b"
      unitRef="pure">-0.1679</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="ETFMember_S000011322_C000031350"
      id="x_43de8a65-d3a2-45af-a68c-67376cd33907">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="ETFMember_S000011322"
      id="b752bdfd-3523-49fb-a5c9-f3d0b61ef907">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_C000031350_BasedonNAVMember"
      decimals="4"
      id="x_45f64f12-2db4-427d-9a42-6491d70454fe"
      unitRef="pure">-0.0979</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_C000031350_BasedonNAVMember"
      decimals="4"
      id="x_5e806d28-9aac-4732-8407-b5474debfddf"
      unitRef="pure">0.1035</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_C000031350_BasedonNAVMember"
      decimals="4"
      id="x_0548c5bd-4a50-4973-a140-abdc69532d33"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_9320d76a-a28a-405c-9a69-a8d7cddd0a3e"
      unitRef="pure">-0.1022</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_9ce0b00e-ec06-454d-b75e-12f85c298100"
      unitRef="pure">0.0986</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="faef2618-b9be-4bc7-9a39-fcafc8fb6be5"
      unitRef="pure">0.1150</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_014628de-b10f-415d-8923-1f33876ddb4f"
      unitRef="pure">-0.0551</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="c27bc51c-c5cc-4a8c-985c-aed17c8ca71f"
      unitRef="pure">0.0815</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_C000031350_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_08239e65-c4f4-4bf3-a11e-db4df9cb8241"
      unitRef="pure">0.0990</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_C000031350_BasedonMarketPriceMember"
      decimals="4"
      id="eb473fc0-ca16-464a-9a5e-20cf539a8c72"
      unitRef="pure">-0.0979</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_C000031350_BasedonMarketPriceMember"
      decimals="4"
      id="x_9c9f2569-5bae-4f11-9bf5-9742a4add99b"
      unitRef="pure">0.1034</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_C000031350_BasedonMarketPriceMember"
      decimals="4"
      id="x_1fb169c3-d9ed-4000-82a6-39294d7c500a"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_SplicedSPUSDividendGrowersIndexMember"
      decimals="4"
      id="d1d3cce5-f39d-4276-bd6f-efed292203f2"
      unitRef="pure">-0.0970</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_SplicedSPUSDividendGrowersIndexMember"
      decimals="4"
      id="x_3b6882ae-d7e0-4ea5-b770-1edd850f38cd"
      unitRef="pure">0.1043</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_SplicedSPUSDividendGrowersIndexMember"
      decimals="4"
      id="d93f2f95-f32d-4cd5-b5d8-fcd2fdc46711"
      unitRef="pure">0.1210</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_SPUSDividendGrowersIndexMember"
      decimals="4"
      id="ad63c0de-9555-4700-b0de-f594368ad5f1"
      unitRef="pure">-0.0970</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_64ebee97-4664-4232-8ada-3b2c2ef342b5"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_914ae82c-a7f7-484c-8689-c44745851704"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000011322_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_2275207e-62ba-4f9b-a748-fe6e87120f71"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="ETFMember_S000011322"
      id="x_831883eb-1216-4bc0-9291-6fbd2466b5c2">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="ETFMember_S000011322"
      id="c0a4395a-db10-4089-9652-fec7f2b3e922">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="ETFMember_S000011322"
      id="a5adee77-f817-43a6-b173-8d18dc62d47f">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="ETFMember_S000011322"
      id="x_52e54a9c-f1a6-4abf-b293-e45c203c7013">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="InvestorMember_S000002920"
      id="x_557eae4c-96e8-4952-a117-ee8838037de0">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="InvestorMember_S000002920"
      id="a6d6073a-6bf8-4461-b759-e3313c1557be">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="InvestorMember_S000002920"
      id="a9bf94f5-ec48-441a-9ce6-3bd0e743d2c9">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide, primarily, a growing stream of income over time and, secondarily, long-term capital appreciation and current income.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="InvestorMember_S000002920"
      id="x_415e681e-6d22-4e3b-bc8e-c25fa0a00b12">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="InvestorMember_S000002920"
      id="ea61cded-2fd9-4c93-8144-19b0b810a11f">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="InvestorMember_S000002920"
      id="ab675ce9-99d9-42b9-ab19-d0c9be08bdea">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_429c079d-e905-4d1f-b26a-48729751bb17"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="f16e3c2e-7313-4942-8622-3dd78e96d0f2"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_9e5155ac-ad4b-458a-9d02-757c5c2ca5d3"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="ec9ac37d-80cf-4991-85ee-2fd575fccd19"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="INF"
      id="x_1b840fe8-2fbc-4704-8781-ee67512def4f"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="InvestorMember_S000002920"
      id="ef7b1adc-4304-4ae0-a006-456558af4769">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_274e5576-641b-431b-a7b5-a841f55ed6e1"
      unitRef="pure">0.0029</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="c63746fd-f6f6-4ba2-b1be-bd8b24327891"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_03956216-58a0-40b0-b656-a992df49b0b9"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_9294a341-85fa-40d8-b6e9-ee66bf64d8e7"
      unitRef="pure">0.0030</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="InvestorMember_S000002920"
      id="x_34ff3ec3-a8d7-491d-b37f-0e3a96dd9276">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="InvestorMember_S000002920"
      id="x_779ef9a4-f432-4e97-8ffe-541b0582fc7c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the Fund provides a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="INF"
      id="a010a404-4c5c-4e16-947e-6731ea3ee95b"
      unitRef="USD">31</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="INF"
      id="x_0a849275-b634-48ab-81c5-66a674bae5fd"
      unitRef="USD">97</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="INF"
      id="x_5453e0d3-e68c-405f-ae98-3547e1e4b029"
      unitRef="USD">169</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="INF"
      id="x_7d4327bf-383d-4a34-b43d-1800d170c4cf"
      unitRef="USD">381</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="InvestorMember_S000002920"
      id="x_6d7ddc1d-72c9-427b-86a3-12f1d76c0fd9">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="InvestorMember_S000002920"
      id="bba93860-d502-4d31-8a53-0bd1cc207179">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;11&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="InvestorMember_S000002920"
      decimals="4"
      id="x_4ecc6b6a-4c16-4ee0-a3e7-6f97bbbf7349"
      unitRef="pure">0.11</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="InvestorMember_S000002920"
      id="b7abbec2-d15c-4892-83f6-e1116c82de41">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="InvestorMember_S000002920"
      id="db500705-3c3c-487c-859a-946973243ebf">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund invests primarily in stocks that tend to offer current dividends. The Fund focuses on high-quality companies that have prospects for long-term total returns as a result of their ability to grow earnings and their willingness to increase dividends over time. These stocks typically&#x2014;but not always&#x2014;will be large-cap, will be undervalued relative to the market, and will show potential for increasing dividends. The Fund seeks to be diversified across industry sectors.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="InvestorMember_S000002920"
      id="x_0ac1b159-3e60-4ef4-bcad-81d2f45ff0e0">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="InvestorMember_S000002920"
      id="x_7faf3d02-9255-42f5-879d-38411e72ed4b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Manager risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investments in the industrials and health care sectors subject the Fund to proportionately higher exposure to the risks of these sectors.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from dividend-paying large-capitalization stocks will trail returns from the overall stock market. Large-cap stocks tend to go through cycles of doing better&#x2014;or worse&#x2014;than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="InvestorMember_S000002920"
      id="dc1d3c6f-16d2-428e-aeb4-57ada7e6413d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="InvestorMember_S000002920"
      id="x_8857c726-2b79-4032-a322-5c6441d27572">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="InvestorMember_S000002920"
      id="e872c515-6d2c-4268-9061-f59cca987538">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="InvestorMember_S000002920"
      id="fb6b76f5-fd38-4420-8489-d8e193dbd6af">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Fund compare with those of a relevant market index and other comparative indexes, which have investment characteristics similar to those of the Fund. The Dividend Growth Spliced Index reflects the performance of the NASDAQ US Dividend Achievers Select Index through September 19, 2021, and the S&amp;amp;P U.S. Dividend Growers Index thereafter. &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt; Updated &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;performance information is available on our website at &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at 800-662-7447.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="InvestorMember_S000002920"
      id="d31ab82b-d073-4f37-aa62-4876aafd608a">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Fund compare with those of a relevant market index and other comparative indexes, which have investment characteristics similar to those of the Fund. The Dividend Growth Spliced Index reflects the performance of the NASDAQ US Dividend Achievers Select Index through September 19, 2021, and the S&amp;amp;P U.S. Dividend Growers Index thereafter. &lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="InvestorMember_S000002920"
      id="x_8a906322-0972-4fce-a86d-6519a2b429f4">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="InvestorMember_S000002920"
      id="x_56aa9692-6e3e-470a-be1c-d445c6153839">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Dividend Growth Fund Investor Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="InvestorMember_S000002920"
      id="x_917280f2-7193-4757-a086-8489fc0d89fa">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="InvestorMember_S000002920_C000008004"
      id="x_023e15dc-d0ca-4b88-87e3-0ea09fa285ca">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_06031512-9c88-4e0a-88de-db0c0b3591fc"
      unitRef="pure">0.1384</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="InvestorMember_S000002920_C000008004"
      id="af1b17b1-c188-4ca1-8dcc-7f666c767941">2019-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="InvestorMember_S000002920_C000008004"
      id="x_2257e2ef-30b5-4f88-9315-6f42fa2b8124">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_20bfbedf-5e91-4353-a32e-586ec1da6b7b"
      unitRef="pure">-0.1729</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="InvestorMember_S000002920_C000008004"
      id="bff4fa92-a059-4674-8e4a-59dc9ac1cb41">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="InvestorMember_S000002920"
      id="x_29a863bf-75eb-4938-9f3b-5d5707a04e8d">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="a4bf4f21-9c62-4a20-b1cb-e99b9a7597f1"
      unitRef="pure">-0.0488</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="b0a462c1-424f-4bf6-8a31-e955faaf4d46"
      unitRef="pure">0.1179</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002920_C000008004"
      decimals="4"
      id="x_6a8df0ab-fb4a-4774-8a1f-e5e13b8436c9"
      unitRef="pure">0.1296</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="c769e49c-8d91-4c79-8240-8e60084462dc"
      unitRef="pure">-0.0621</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="c822b00c-5545-426c-b4e7-91963c2928bc"
      unitRef="pure">0.1030</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="b8a252e5-8851-4583-85f3-f25c15a89462"
      unitRef="pure">0.1168</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="a50a0ede-ccea-4821-a862-d03975f45794"
      unitRef="pure">-0.0197</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_96e37151-fb40-4995-938a-df4297633bd6"
      unitRef="pure">0.0913</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002920_C000008004_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_570cf2ac-2c47-4216-9254-6f05f2403e58"
      unitRef="pure">0.1049</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002920_DividendGrowthSplicedIndexMember"
      decimals="4"
      id="x_9d571ef9-07cb-4137-bb23-29ed95ef4c6b"
      unitRef="pure">-0.0970</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002920_DividendGrowthSplicedIndexMember"
      decimals="4"
      id="x_284e6b5d-091d-4dd3-a962-8739acf5253c"
      unitRef="pure">0.1043</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002920_DividendGrowthSplicedIndexMember"
      decimals="4"
      id="ccce2752-d5bf-475f-9d75-f819664f09d5"
      unitRef="pure">0.1210</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002920_SPUSDividendGrowersIndexMember"
      decimals="4"
      id="x_27b3e41b-827b-4dcf-810f-544308953f3b"
      unitRef="pure">-0.0970</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002920_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_5bb0f9ed-198c-4409-b740-0a152c7151e9"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002920_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="a25832f8-0acc-455d-8e5b-ab3daa60f85f"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002920_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_46aa33fa-a785-4fe9-b3a6-a4f71ed40a5e"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="InvestorMember_S000002920"
      id="x_692e6365-6991-4deb-87a0-053a31a2cade">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="InvestorMember_S000002920"
      id="x_819c6f32-5999-4292-932c-29cdf9151bb9">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="InvestorMember_S000002920"
      id="b5d82709-bc62-4c26-9206-af8a26b85f21">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="InvestorMember_S000002920"
      id="x_0164f5c4-0a33-40ed-8018-301e75f220a3">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="RetailMember_S000002921"
      id="x_7761e412-93e8-4367-8056-bee3a3646fe9">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="RetailMember_S000002921"
      id="a73bf8a0-86e4-4c83-aa4c-64f557ecd81c">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="RetailMember_S000002921"
      id="x_6eebd27d-a449-45a3-b6ab-1891bcaca92e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide long-term capital appreciation.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="RetailMember_S000002921"
      id="f0949545-6f66-4343-a8f9-35edbb3804ae">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="RetailMember_S000002921"
      id="x_4a4fcdad-81a1-4bb3-adb6-9b839d2e8a53">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Investor Shares or Admiral Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="RetailMember_S000002921"
      id="c3119676-ed71-41a6-80ac-5fe78f389b5b">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_66afed85-9cff-423c-8e69-9dc21d036c39"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_8cef8b93-c196-47fc-9975-71f3283c0b30"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="f108c163-2a0e-4293-895d-743625372c8a"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_9d257bde-6782-43cb-abe3-d926e2dfb998"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="a682b414-16e1-4e76-acc7-1fbc7dc4bdaa"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_7c16c3b4-89e8-4edd-871b-28845023021f"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_9cf4fa30-b6d3-4502-8a0e-82b0519ec5e0"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_6353b933-2866-4f05-9a9e-866f5393b261"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000002921_C000008005"
      decimals="INF"
      id="x_722764b4-6d51-4660-ad84-95d4d4598108"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000002921_C000008006"
      decimals="INF"
      id="x_634838f9-0eee-465b-be0e-3b97bbff69fb"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="RetailMember_S000002921"
      id="d52c1645-1295-4c85-aeec-554b4425a85b">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_4d598121-a1c8-4f81-a6a8-88a4b28df064"
      unitRef="pure">0.0044</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_8d21ba53-30de-4f00-b13e-d9be527d5b33"
      unitRef="pure">0.0036</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="c9e473e3-d2cc-46aa-9204-ec616e4e88c3"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_03729ced-3aa6-42a0-bd6a-7c183db7d9d6"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_286cef0b-5b0e-47ec-b0ba-43bada0c1bbd"
      unitRef="pure">0.0002</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_9eb53eb4-abaf-460f-b60a-0422aee98f41"
      unitRef="pure">0.0002</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="c14f3dd0-555b-4d1c-ae84-b8a869f74644"
      unitRef="pure">0.0046</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="f39acf2b-55c4-4e6a-a0a9-e0c98b708e91"
      unitRef="pure">0.0038</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="RetailMember_S000002921"
      id="a36cbd17-1330-4007-a64f-f127752b967c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Examples&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="RetailMember_S000002921"
      id="x_3bfd3585-fd4c-4413-9160-25fe8c659ad2">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following examples are intended to help you compare the cost of investing in the Fund&#x2019;s Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. These examples assume that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000002921_C000008005"
      decimals="INF"
      id="x_32413d94-85fe-49fa-87fb-d55f5ee3ea29"
      unitRef="USD">47</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000002921_C000008005"
      decimals="INF"
      id="x_4a25b13f-eec3-426e-9cad-1bfcb3d16b3a"
      unitRef="USD">148</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000002921_C000008005"
      decimals="INF"
      id="x_7ccedcaf-e8bd-4fdd-9902-819b2efd9ed9"
      unitRef="USD">258</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000002921_C000008005"
      decimals="INF"
      id="b2e73060-b48d-4e47-a76d-3ad1d5d7f1e9"
      unitRef="USD">579</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000002921_C000008006"
      decimals="INF"
      id="a730749a-5081-4f0e-9839-d2a4e7de616b"
      unitRef="USD">39</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000002921_C000008006"
      decimals="INF"
      id="x_9af3af51-8f8d-4657-875a-4016c16c285f"
      unitRef="USD">122</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000002921_C000008006"
      decimals="INF"
      id="ac05bd72-0d09-4cc3-b8a1-3059b97f2fd3"
      unitRef="USD">213</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000002921_C000008006"
      decimals="INF"
      id="aab6d158-ca3b-4751-ad41-acb2f3c79e3c"
      unitRef="USD">480</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="RetailMember_S000002921"
      id="x_6a801238-e7b2-4e2b-8281-e6541e543f64">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="RetailMember_S000002921"
      id="e70abe1b-2814-498d-b9e1-11b7faf2e263">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;16&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="RetailMember_S000002921"
      decimals="4"
      id="x_7880cabf-9e90-4a8d-b038-6facf90c0d23"
      unitRef="pure">0.16</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="RetailMember_S000002921"
      id="c81e1454-16fc-4d34-8409-02bec5542bf1">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="RetailMember_S000002921"
      id="f63d01aa-1a9a-43b6-be10-7a738a003b6a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Under normal circumstances, the Fund invests at least 80% of its assets in the common stocks of companies principally engaged in activities in the energy industry, such as the exploration, production, and transmission of energy or energy fuels; the making and servicing of component products for such activities; energy research; and energy conservation or pollution control. The Fund may invest in foreign stocks as part of its principal investment strategy.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="RetailMember_S000002921"
      id="x_22982e26-6d7e-402a-98d8-956b63ba5331">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="RetailMember_S000002921"
      id="x_8d99b6ff-93b2-4e63-96ae-927e877ec273">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that there will be particular problems affecting an entire industry. Any fund that concentrates in a particular industry will generally be more volatile than a fund that invests more broadly. Because the Fund normally invests at least 80% of its assets in the common &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;stocks of companies principally engaged in activities in the energy industry, the Fund&#x2019;s performance largely depends&#x2014;for better or for worse&#x2014;on the overall condition of the energy industry. The energy industry could be adversely affected by energy prices, supply-and-demand for energy resources, and various political, regulatory, and economic factors. Additionally, commodity prices may have a significant impact on the stock prices of energy companies.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s investments in foreign stocks can be riskier than U.S. stock investments. Foreign stocks may be more volatile and less liquid than U.S. stocks. The prices of foreign stocks and the prices of U.S. stocks may move in opposite directions.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Manager risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective. In addition, significant investments in the utilities sector and the integrated oil and gas sector subjects the Fund to proportionately higher exposure to the risks of these sectors.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Country risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that world events&#x2014;such as political upheaval, financial troubles, or natural disasters&#x2014;will adversely affect the value of securities issued by companies in foreign countries. Because the Fund may invest a large portion of its securities of companies located in any one country or region, the Fund's performance may be hurt disproportionately by the poor performance of its investments in that&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;line-height:11.5pt;"&gt;  &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;area.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Currency risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund tends to invest a high percentage of assets in its ten largest holdings, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of particular issuers as compared with diversified mutual funds.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="RetailMember_S000002921"
      id="x_08a9ad7a-9514-4b0a-9734-8b4d919ec46d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="RetailMember_S000002921"
      id="x_98047890-300b-465e-8534-9f7bf1ee66cf">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of particular issuers as compared with diversified mutual funds.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="RetailMember_S000002921"
      id="x_70aacc6d-87ba-4ca9-8837-e3cac6758512">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="RetailMember_S000002921"
      id="x_265515ac-b009-4b8c-80f2-8cf95ff715a4">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="RetailMember_S000002921"
      id="bd9b37d0-b179-411c-8387-4c2c7704d8be">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;. The Spliced Energy Index &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;reflects the performance of the MSCI ACWI Energy Index through October 20, 2020, and the MSCI Energy + Utilities Index thereafter. Returns for the MSCI indexes shown are adjusted for withholding taxes. Keep in mind that the Fund&#x2019;s past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="RetailMember_S000002921"
      id="x_9ad7884d-7195-40a6-ab70-f34da745126b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund&lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="RetailMember_S000002921"
      id="x_5d7348d3-d5f1-4c48-9a54-317d7153f524">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="RetailMember_S000002921"
      id="x_7b70048a-f03e-4aaa-995c-60378d1e06bb">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="RetailMember_S000002921"
      id="e531f7ec-b75f-4d55-8dac-247ad3a22ca3">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Energy Fund Investor Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="RetailMember_S000002921"
      id="x_98350d15-e22d-454f-90ef-f34623d15e3b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="RetailMember_S000002921_C000008005"
      id="f9fad415-38ae-46e4-8a83-f1721bc30676">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_1425bee3-b145-40b5-9ee5-11a2e3a04d09"
      unitRef="pure">0.1609</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="RetailMember_S000002921_C000008005"
      id="x_3c08dff5-d1a7-4ed3-ad1a-9bbe16ce1bfd">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="RetailMember_S000002921_C000008005"
      id="x_179c86e5-f514-49ec-a2fc-af524970ac36">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_8b6a6827-0980-4c68-ac56-6bd89c02e1e0"
      unitRef="pure">-0.4105</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="RetailMember_S000002921_C000008005"
      id="x_91a69773-f1c7-4c48-82a9-5ee235273270">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="RetailMember_S000002921"
      id="x_2c5d0d28-098d-492d-9845-d61c8b4b530b">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_68d449af-b085-4e9a-9656-cb78534d147b"
      unitRef="pure">0.2369</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_045837eb-cf7d-426b-9813-9283a94a4d56"
      unitRef="pure">0.0048</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_C000008005"
      decimals="4"
      id="x_3a4f8955-f6dd-46c4-a57f-61c40b7c613b"
      unitRef="pure">0.0113</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_8060339d-d07a-4209-97ad-4e091dcb8499"
      unitRef="pure">0.2232</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_24714104-8f25-45e2-836b-cf0fca44cfbf"
      unitRef="pure">-0.0040</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="fcf78ea7-f16c-40fa-bd75-42c8c436924d"
      unitRef="pure">0.0020</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="f57b375a-5824-42bb-b8bf-7daa7cf8bd45"
      unitRef="pure">0.1489</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_84e9a02c-be4b-42f6-9a75-2aa2764a1af3"
      unitRef="pure">0.0025</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_C000008005_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="ae9939c2-767b-497b-aa36-a1b93dd98b3d"
      unitRef="pure">0.0073</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_6f4bea20-6382-4d1e-aff9-4406edb79d35"
      unitRef="pure">0.2380</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="x_2b0e9c20-2517-42f9-9bd2-5920c55ec865"
      unitRef="pure">0.0057</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_C000008006"
      decimals="4"
      id="dcd451a3-a705-4868-8056-daaf3af7d591"
      unitRef="pure">0.0120</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_SplicedEnergyIndexMember"
      decimals="4"
      id="a9e5d6cc-c85d-48d3-92e0-ef6a1b4e40b2"
      unitRef="pure">0.1640</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_SplicedEnergyIndexMember"
      decimals="4"
      id="dd37d969-84e0-4669-a01b-0de066e1a537"
      unitRef="pure">-0.0180</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_SplicedEnergyIndexMember"
      decimals="4"
      id="b0f8ac6e-9b1e-4d7a-9045-08aea46da9eb"
      unitRef="pure">-0.0049</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_MSCIACWIEnergyplusUtilitiesIndexMember"
      decimals="4"
      id="x_77f3dbc9-8ace-4769-84fc-0b2548d44287"
      unitRef="pure">0.1640</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002921_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_10bd3126-4e0c-4397-8c89-eaa3b19b7886"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002921_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_9f74088a-6b1e-4451-a836-daa8b2b1ee13"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002921_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_13391575-33e9-4297-a32e-4ab5f8c91a10"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="RetailMember_S000002921"
      id="x_2458c6f0-b3a3-416a-b5f2-219d607348fd">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are shown only for the Investor &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Shares and may differ for each share class. After-tax returns are &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;not relevant for a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="RetailMember_S000002921"
      id="x_0726388e-812b-44ea-9fc5-a7f6675cc7fa">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableOneClassOfAfterTaxShown
      contextRef="RetailMember_S000002921"
      id="x_4d290787-0c29-4484-a900-822d551b42bb">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are shown only for the Investor &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Shares and may differ for each share class. After-tax returns are &lt;/span&gt;</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="RetailMember_S000002921"
      id="eb9cb6a0-2396-429b-aa93-c40729c23802">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;not relevant for a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="RetailMember_S000002921"
      id="x_04d8fd55-95ca-429e-ba25-aeb6c7f54a22">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="RetailMember_S000002923"
      id="x_39383ea9-8af8-4295-8146-9b57df1e5035">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="RetailMember_S000002923"
      id="x_763fb414-af74-43ea-90b3-f299944643ed">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="RetailMember_S000002923"
      id="x_25d04184-e5f0-4310-9f9c-0c8decd28fba">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide long-term capital appreciation.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="RetailMember_S000002923"
      id="bfafbdce-8a5c-47bf-b7c6-0431e7840c17">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="RetailMember_S000002923"
      id="ac4434e2-d71a-4220-8306-aeb6bc9c580e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="RetailMember_S000002923"
      id="x_4e2e1112-768c-445a-8c77-c9a95fe9f316">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="c3940eca-4e8d-47a8-9f32-e30047b4cf55"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_7e5b7de8-14ce-4543-bb8e-659cecb85e6b"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_33509af4-e8da-4174-abcc-af69c07083e0"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_972943d8-c925-4e7c-ae86-e7ba0b74bbb8"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000002923_C000008009"
      decimals="INF"
      id="x_9d715424-7550-4156-b432-fb5260bbb0c0"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="RetailMember_S000002923"
      id="x_14dda24f-c4ea-409c-ae4f-dca52fffa341">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_2d6a0a20-457a-4c4e-8555-9ad97de6b1eb"
      unitRef="pure">0.0041</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="ca69c0be-294d-42de-8094-7dc290efd045"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_8cc390e2-9e09-48e2-8b12-52e7b0d9367f"
      unitRef="pure">0.0002</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="c768a5aa-73d3-4e07-8b07-3eba57a1d3d4"
      unitRef="pure">0.0043</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="RetailMember_S000002923"
      id="x_01f25750-315e-4795-a4f4-ac08af728706">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="RetailMember_S000002923"
      id="x_9806ec29-b4db-4994-a5b2-b8bfc06e754b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the Fund provides a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000002923_C000008009"
      decimals="INF"
      id="d5bc0d2a-e989-4047-b718-ee2751a5ce66"
      unitRef="USD">44</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000002923_C000008009"
      decimals="INF"
      id="x_928054eb-fb0e-4859-9055-3b1f45eb84d8"
      unitRef="USD">138</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000002923_C000008009"
      decimals="INF"
      id="e8ffdb2f-e7c1-4d64-8955-8ac84005bf74"
      unitRef="USD">241</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000002923_C000008009"
      decimals="INF"
      id="x_41fecb5d-fe9e-42f7-8aca-4bf37528b976"
      unitRef="USD">542</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="RetailMember_S000002923"
      id="a0481fff-edac-427e-bb3f-1355d82498bf">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="RetailMember_S000002923"
      id="x_1a4622e0-196e-4d16-9ae8-cf1b53d7c33e">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;63&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="RetailMember_S000002923"
      decimals="4"
      id="x_5cfb04a2-0485-4bc9-9133-2ee2ff537f87"
      unitRef="pure">0.63</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="RetailMember_S000002923"
      id="x_7238dd46-0d82-4e35-a0ac-55bfc4d01218">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="RetailMember_S000002923"
      id="e5e71da7-03e6-47e3-a2fb-f68b1895b2b0">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund invests in U.S. and foreign equity securities. The Fund seeks to generate above average compounded returns by purchasing securities in companies and industries where capital spending is declining, and seeks to avoid companies, assets, and business models that can be easily replicated. Companies, assets, and business models that cannot be easily replicated may include those with differentiated offerings, a low-cost advantage, or that maintain an advantage over competitors in their same industry. The Fund typically invests across a range of sectors, a mix of developed and emerging markets stocks, and typically holds companies across the market capitalization spectrum. The Fund will concentrate its investments (i.e. hold 25% or more of its net assets) in securities of issuers whose principal business activities are in the precious metals and mining industry.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="RetailMember_S000002923"
      id="x_0e2f0734-2dd2-4371-a28c-0a27ce562d4f">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="RetailMember_S000002923"
      id="x_1ac74f18-8161-4dc2-abb5-18451beac43c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s investments in foreign stocks can be riskier than U.S. stock investments. Foreign stocks may be more volatile and less liquid than U.S. stocks. The prices of foreign stocks and the prices of U.S. stocks may move in opposite directions.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from the types of stocks in which the Fund invests will trail returns from global stock markets. Small-, mid-, and large-capitalization stocks each tend to go through cycles of doing better&#x2014;or worse&#x2014; than other segments of the stock market or the global stock market in general. These periods have, in the past, lasted for as long as several years. Historically, small- and mid-cap stocks have been more volatile in price than large-cap stocks. The stock prices of small and mid-size companies tend to experience greater volatility because, among other things, these companies tend to be more sensitive to changing economic conditions.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Manager risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Country/regional risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that world events&#x2014;such as political upheaval, financial troubles, or natural disasters&#x2014;will adversely affect the value of securities issued by companies in foreign countries or regions. Country/regional risk is especially high in emerging markets.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Emerging markets risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the stocks of companies located in emerging markets will be substantially more volatile, and substantially less liquid, than the stocks of companies located in more developed foreign markets because, among other factors, emerging markets can have greater custodial and operational risks; less developed legal, tax, regulatory, financial reporting, accounting, and recordkeeping systems; and greater political, social, and economic instability than developed markets.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Currency risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates. Currency risk is especially high in emerging markets.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that there will be particular problems affecting an entire industry. Any fund that concentrates in a particular industry will generally be more volatile than a fund that invests more broadly. The &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;precious metals and mining industry could be affected by sharp price volatility caused by global economic, financial, and political factors. Resource availability, government regulation, inflation expectations and economic cycles could also adversely affect that industry.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of particular issuers as compared with diversified mutual funds.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="RetailMember_S000002923"
      id="efc348dd-ba5b-4326-9c43-dcb000a9abba">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="RetailMember_S000002923"
      id="x_7de597b0-4b61-42ef-8cc9-0828213dd983">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of particular issuers as compared with diversified mutual funds.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="RetailMember_S000002923"
      id="x_16a826fe-0f1a-433e-9045-d29d5c51a078">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="RetailMember_S000002923"
      id="cc8f3b37-e7c7-42bf-931c-5127551a275c">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="RetailMember_S000002923"
      id="x_1d8b7067-8dea-49a3-9a96-0c65e018dd77">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Effective September 26, 2018, the Fund changed its name, performance benchmark, and investment strategy. Performance for the periods prior to September 26, 2018, shown below is based on the investment strategy utilized by the Fund prior to September 26, 2018, under the name Vanguard Precious Metals and Mining Fund. Performance for the periods through July 27, 2018, shown below reflects that of the Fund&#x2019;s prior investment advisor, M&amp;amp;G Investment Management Limited (&#x201c;M&amp;amp;G&#x201d;). M&amp;amp;G served as the Fund&#x2019;s investment advisor through July 27, 2018.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Fund compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. The Spliced Global Capital Cycles Index reflects the performance of the S&amp;amp;P Global Custom Metals and Mining Index through September 25, 2018 and S&amp;amp;P Global BMI Metals &amp;amp; Mining 25% Weighted Index (USD) (Custom) thereafter. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Returns for the indexes shown are adjusted for withholding taxes. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated performance &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;information is available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="RetailMember_S000002923"
      id="x_6260d679-36b6-4b1c-83c5-f0a40ec3d9a3">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Fund compare with those of relevant market indexes, which have investment characteristics similar to those of the Fund. The Spliced Global Capital Cycles Index reflects the performance of the S&amp;amp;P Global Custom Metals and Mining Index through September 25, 2018 and S&amp;amp;P Global BMI Metals &amp;amp; Mining 25% Weighted Index (USD) (Custom) thereafter. &lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="RetailMember_S000002923"
      id="x_215ea87c-45e5-4374-825f-bbfcda9e3212">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="RetailMember_S000002923"
      id="x_159a1f57-cccd-4d27-958f-1c7434060557">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="RetailMember_S000002923"
      id="x_051c20de-7b9a-4f8a-8020-4771bf5d1a09">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="RetailMember_S000002923"
      id="x_2fc7a21f-6e30-4f69-8b1d-b50ad93b37b1">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Global Capital Cycles Fund Investor Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="RetailMember_S000002923"
      id="x_7381632c-40bc-4746-a77d-d4d8d2f49573">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="RetailMember_S000002923_C000008009"
      id="x_8cc78778-ff6b-4a1d-99c2-b88869ad6e42">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="f3830327-ef21-4da9-80f4-b4786d720c5c"
      unitRef="pure">0.3484</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="RetailMember_S000002923_C000008009"
      id="x_02ae3554-1d74-427a-93ef-7b0e67adbcb3">2016-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="RetailMember_S000002923_C000008009"
      id="x_52896007-fb1b-4f5f-a748-564a7e449737">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_80cca449-ef70-4c91-a1aa-223136717008"
      unitRef="pure">-0.2528</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="RetailMember_S000002923_C000008009"
      id="x_21f0221b-cd23-4ce1-8fe4-92491d2009a6">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="RetailMember_S000002923"
      id="x_5d59f512-f6b5-480e-a69e-6a28711f3ede">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="bdcc5d67-d292-46c4-a409-c68549b17482"
      unitRef="pure">0.0739</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="eddecb24-3597-420e-9105-a077d7affcfc"
      unitRef="pure">0.0421</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002923_C000008009"
      decimals="4"
      id="x_78e1aa34-2d91-492c-b275-77539ca8167e"
      unitRef="pure">-0.0156</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_7190a3cf-a0a1-42ee-be30-1a83832fbd63"
      unitRef="pure">0.0680</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_30fd104c-c0f1-4ac3-ae46-66501564083f"
      unitRef="pure">0.0356</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_2eceb64a-1799-4d2d-88ca-6663ed5786ba"
      unitRef="pure">-0.0195</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_326926b5-1ecd-4f7c-b244-41d7d7acf8de"
      unitRef="pure">0.0517</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="de7c597e-1af6-4309-a314-b6475f76a643"
      unitRef="pure">0.0318</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002923_C000008009_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="ef6b327e-0881-4f95-9e8c-0ae322813a55"
      unitRef="pure">-0.0122</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002923_SplicedGlobalCapitalCyclesIndexMember"
      decimals="4"
      id="x_76d892d8-cc4f-49c8-bc22-c96f8a8abb77"
      unitRef="pure">-0.1424</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002923_SplicedGlobalCapitalCyclesIndexMember"
      decimals="4"
      id="x_5e37c2d1-d688-4bb3-b047-647850c916ae"
      unitRef="pure">0.0290</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002923_SplicedGlobalCapitalCyclesIndexMember"
      decimals="4"
      id="da3d8762-240b-457e-976e-9ef1ec276ef1"
      unitRef="pure">-0.0093</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002923_SPGlobalBMIMetalsandMining25PercentWeightedIndexUSDCustomMember"
      decimals="4"
      id="x_1d1f41af-718d-49dc-ae60-7a38b1eaa887"
      unitRef="pure">-0.1424</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002923_MSCIACWIIndexMember"
      decimals="4"
      id="x_033ef915-151c-4eb7-be9a-f559a35a0af4"
      unitRef="pure">-0.1836</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002923_MSCIACWIIndexMember"
      decimals="4"
      id="x_1c1eb3ed-1b82-4413-b01c-eda2afef2be8"
      unitRef="pure">0.0523</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002923_MSCIACWIIndexMember"
      decimals="4"
      id="cc8e68ed-0867-4236-8def-6d5ab235c029"
      unitRef="pure">0.0798</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="RetailMember_S000002923"
      id="x_61974d69-fdab-45af-baab-bc8cd432c72a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="RetailMember_S000002923"
      id="a6fc500e-4004-4d7c-85a6-fddc4af59d3d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="RetailMember_S000002923"
      id="x_802557c2-68ae-47ac-be38-16cb0324364f">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="RetailMember_S000002923"
      id="x_6981e66b-280f-41f4-8a1d-2a467b45b287">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="RetailMember_S000065529"
      id="b32869a2-5432-4b5b-b969-3fb22a7828bb">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="RetailMember_S000065529"
      id="fd3104c0-36bb-42c1-84be-345e47c6f4d7">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="RetailMember_S000065529"
      id="x_99f61197-0f89-4aeb-8ecc-f4832db3ed1d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to maximize returns while having greater exposure to companies with attractive environmental, social, and governance characteristics.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="RetailMember_S000065529"
      id="cb8732e6-62fb-4de0-9b90-acd19717bbd3">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="RetailMember_S000065529"
      id="e32cc284-daf4-4d02-8599-0c3a2127b542">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Investor Shares or Admiral Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="RetailMember_S000065529"
      id="ffe1fbfd-9fae-4de6-9fcc-ce266b838f86">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="b829bef0-d941-4326-a59d-1b9acf1c4100"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="x_8cbca7be-ffbb-4470-9e10-9ee8cb2b878d"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="ec395f7d-b18b-4258-8418-37723e19e1a4"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="a55394f5-e204-4310-bdf1-61f87e424054"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="c37ae229-b70f-4e51-834f-ebc25256ea73"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="a2100f33-7e5d-4099-b505-33a302a73e14"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="f7e5591c-05d2-4d21-bf33-106d26035d79"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="x_89602892-11c4-479f-8211-05bc0caf0278"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000065529_C000211922"
      decimals="INF"
      id="a4060d45-148c-4316-9761-5e649d561483"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000065529_C000211921"
      decimals="INF"
      id="x_5103f170-d9b7-4c75-9418-e7d399453162"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="RetailMember_S000065529"
      id="x_0f24cb0f-f1fc-4a62-9c7a-2b1028ffbd35">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_00aafe5a-03ff-4006-b7d2-f0b7d68c1e87"
      unitRef="pure">0.0054</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="x_3a0d8d03-2fa4-46da-959c-e3055dbd17cc"
      unitRef="pure">0.0046</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_3a847c68-8bc7-44f2-bc55-a2a09c0ff48a"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="b3daefa1-2423-4857-924d-9a3a695408d9"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_28943173-6269-4ad6-b465-fc2fcfc53e3e"
      unitRef="pure">0.0003</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="x_99bec530-1834-4082-996d-e1729bf30f3b"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_571c8046-072b-4703-89d4-4dfac47ed9c6"
      unitRef="pure">0.0057</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="de2226db-d0aa-456c-9d73-f1a1b9d79c84"
      unitRef="pure">0.0047</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="RetailMember_S000065529"
      id="ea02d3c3-6fdc-4d84-8c68-40d39f41b24b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Examples&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="RetailMember_S000065529"
      id="dadafedb-49e8-41ab-9095-4263e2f8c74c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following examples are intended to help you compare the cost of investing in the Fund&#x2019;s Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. These examples assume that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000065529_C000211922"
      decimals="INF"
      id="b3503d09-ceb2-486c-9011-ada958ac9c28"
      unitRef="USD">58</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000065529_C000211922"
      decimals="INF"
      id="x_695c3bab-8a3c-40ad-b957-e03dd6d36f1e"
      unitRef="USD">183</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000065529_C000211922"
      decimals="INF"
      id="a8363d5a-6224-47bd-8782-36976a6decc4"
      unitRef="USD">318</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000065529_C000211922"
      decimals="INF"
      id="x_4f9e6d15-140c-4174-b1f3-f11fb4ddf9f0"
      unitRef="USD">714</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000065529_C000211921"
      decimals="INF"
      id="d9e9dcbf-b984-4377-8cd4-e612b0f76b28"
      unitRef="USD">48</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000065529_C000211921"
      decimals="INF"
      id="x_0e2f4a04-5e7f-4bc8-8857-161d0cca9628"
      unitRef="USD">151</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000065529_C000211921"
      decimals="INF"
      id="x_64cabc37-c0eb-485f-b365-5c949e5d7e0b"
      unitRef="USD">263</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000065529_C000211921"
      decimals="INF"
      id="x_6fa588b2-45bb-4f13-97a0-22197a04ca8a"
      unitRef="USD">591</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="RetailMember_S000065529"
      id="bdd0c388-5bfe-4d10-873e-ba47c5516695">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="RetailMember_S000065529"
      id="d0041ac5-dfab-4111-b617-82f8e5c0bad0">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;38&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="RetailMember_S000065529"
      decimals="4"
      id="x_6730b2e0-6f29-4b76-b2f6-00994e4bef50"
      unitRef="pure">0.38</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="RetailMember_S000065529"
      id="f462cf9c-9783-460a-b720-bee25871e691">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="RetailMember_S000065529"
      id="x_43dfb5ed-37bb-4daf-9021-a20be5cb6df0">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Under normal circumstances, at least 80% of the Fund&#x2019;s assets will be invested in common stocks of companies that meet the advisor&#x2019;s environmental, social, and governance (ESG) criteria. The Fund will typically invest in stocks of large and mid-size companies located in a number of countries throughout the world, including issuers located in emerging markets.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund&#x2019;s investment approach is based on proprietary, bottom-up fundamental research conducted by the advisor. The advisor considers the investment universe, sector-by-sector and region-by-region, looking for companies with strong long-term fundamentals that also meet the advisor's ESG criteria. The advisor will place an emphasis on the following company attributes: (1) a proven track record of effective capital allocation; (2) leading ESG practices as determined by the advisor through an evaluation of how the company integrates material ESG risks and opportunities into its corporate strategy (e.g., a realistic assessment of long-term ESG risks and opportunities, increased transparency into the company's ESG practices, management teams with aligned incentives, &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;better governance practices, and thoughtful resource allocation); and (3) confidence that a wide gap between return on capital and cost of capital can be sustained. The advisor will then examine issues outside the scope of traditional research&#x2014;such as corporate culture, adaptability, and employee engagement&#x2014;to build conviction in each holding.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="RetailMember_S000065529"
      id="bb34bdac-9dbd-40b3-8024-ab3fbbb2a41f">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="RetailMember_S000065529"
      id="x_3a78f0b8-b69b-4a4c-8708-1a6b88f49558">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s investments in foreign stocks can be riskier than U.S. stock investments. Foreign stocks may be more volatile and less liquid than U.S. stocks. The prices of foreign stocks and the prices of U.S. stocks may move in opposite directions.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Country/regional risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that world events&#x2014;such as political upheaval, financial troubles, or natural disasters&#x2014;will adversely affect the value of securities issued by companies in foreign countries or regions. Because the Fund may invest a large portion of its assets in securities of companies located in any one country or region, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of its investments in that area. Country/regional risk is especially high in emerging markets.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund tends to invest a high percentage of assets in its ten largest holdings, the Fund's performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;ESG investing risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the stocks selected by the advisor based on its ESG criteria generally will underperform the stock market as a whole or that the particular stocks selected by the advisor based on its ESG criteria will, in the aggregate, trail returns of other ESG funds. There are significant differences in interpretations of what it means for a company to meet ESG criteria. The advisor's assessment of a company may differ from that of other funds or an investor&#x2019;s assessment of such company. As a result, stocks selected by the advisor may not reflect the beliefs and values of any particular investor. The advisor is dependent on the availability of timely and accurate ESG data being reported by companies to evaluate their ESG criteria. In addition, the Advisor may not assess every investment for ESG factors and, when it does, not every ESG factor may be identified or evaluated.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;line-height:11.5pt;"&gt;  &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The ESG criteria assessed&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;line-height:11.5pt;"&gt; &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;by the Advisor may change over&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;line-height:11.5pt;"&gt;  &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Currency risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates. Currency risk is especially high in emerging markets.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="RetailMember_S000065529"
      id="x_3bea4a14-3fd3-44b5-bbaa-3e3022fd2a81">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="RetailMember_S000065529"
      id="f19d357e-90bc-4af0-b8eb-f3e0d1e340a8">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="RetailMember_S000065529"
      id="x_6ee7915f-0a97-4b7b-b0d7-783d899c22e9">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="RetailMember_S000065529"
      id="x_50124184-e0f8-4975-9be9-0155be55709e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. FTSE All-World Index returns are adjusted for withholding taxes applicable to U.S.-based mutual funds organized as Delaware statutory trusts. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated performance information is available on our &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="RetailMember_S000065529"
      id="x_9a2b9229-0c50-4fb2-8328-6327cc5f23f6">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. FTSE All-World Index returns are adjusted for withholding taxes applicable to U.S.-based mutual funds organized as Delaware statutory trusts. &lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="RetailMember_S000065529"
      id="d23a64df-60ba-444a-8b95-4fe0afe59442">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="RetailMember_S000065529"
      id="x_3229f761-794f-41dc-b19e-213c5d023dfb">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="RetailMember_S000065529"
      id="x_4e5fa1fb-3eb2-4cc7-80f3-92f013e520b0">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="RetailMember_S000065529"
      id="x_914e3e59-155d-452c-8366-cb706e212c29">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Global ESG Select Stock Fund Investor Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="RetailMember_S000065529"
      id="ee1cf7d8-96cf-42ad-b23c-64520ddd61e6">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="RetailMember_S000065529_C000211922"
      id="fb48f7ad-b90e-4850-a316-0ced7ccca466">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="x_6b3a25eb-8fc0-428c-b848-2547e55060eb"
      unitRef="pure">0.1609</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="RetailMember_S000065529_C000211922"
      id="x_2a148cf2-6dc1-4891-b714-308a6ad85984">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="RetailMember_S000065529_C000211922"
      id="d93fa096-618c-4e10-bbaf-2f53baef1d76">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="bf210a19-8284-4187-96f0-8bf8bf337e1d"
      unitRef="pure">-0.1785</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="RetailMember_S000065529_C000211922"
      id="x_7bec1d98-dfa6-4e74-9a14-f1d208260157">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="RetailMember_S000065529"
      id="d0597fb8-199e-4047-9067-37def85b3829">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnInceptionDate
      contextRef="RetailMember_S000065529_C000211922"
      id="x_6cd1a6da-c139-4eb9-b814-c6d89a0874c3">2019-06-05</rr:AverageAnnualReturnInceptionDate>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="fd57b857-9ec3-4597-9034-b71f0a24a709"
      unitRef="pure">-0.1084</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="RetailMember_S000065529_C000211922"
      decimals="4"
      id="d989f011-30f2-439a-88da-1c9b44777df1"
      unitRef="pure">0.1159</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000065529_C000211922_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_88398729-2e5e-4f3d-991a-4a1c19d3a440"
      unitRef="pure">-0.1123</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="RetailMember_S000065529_C000211922_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="b695e5fd-6b88-4c62-942f-29ab94f0fb1f"
      unitRef="pure">0.1108</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000065529_C000211922_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_63c6f2e8-7963-4511-9e49-1a496af21c6a"
      unitRef="pure">-0.0605</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="RetailMember_S000065529_C000211922_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="cae8a644-124a-4517-b178-38d300d479d2"
      unitRef="pure">0.0908</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnInceptionDate
      contextRef="RetailMember_S000065529_C000211921"
      id="x_6d640566-ab43-4e36-96f7-370902388b0f">2019-06-05</rr:AverageAnnualReturnInceptionDate>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="x_90eda097-9dba-4bb2-bc20-6c3fc66c15aa"
      unitRef="pure">-0.1074</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="RetailMember_S000065529_C000211921"
      decimals="4"
      id="feb89bca-4afc-4f93-bd80-d577e939d483"
      unitRef="pure">0.1171</rr:AverageAnnualReturnSinceInception>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000065529_FTSEAllWorldIndexMember"
      decimals="4"
      id="ef394398-860a-49d5-8499-3513e868f47f"
      unitRef="pure">-0.1778</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnSinceInception
      contextRef="RetailMember_S000065529_FTSEAllWorldIndexMember"
      decimals="4"
      id="x_63bd55e3-6752-4842-9b88-af530e2ed74d"
      unitRef="pure">0.0748</rr:AverageAnnualReturnSinceInception>
    <rr:PerformanceTableClosingTextBlock
      contextRef="RetailMember_S000065529"
      id="c855e5ba-1c8b-426c-a878-6c7e214ead32">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are shown only for the Investor &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Shares and may differ for each share class. After-tax returns are &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;not relevant for a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="RetailMember_S000065529"
      id="x_5ffbc334-63e9-4f3d-a31d-4000b01e92cf">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableOneClassOfAfterTaxShown
      contextRef="RetailMember_S000065529"
      id="fe698a11-9ea3-4ec1-9b51-0e1b8e535a9a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are shown only for the Investor &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Shares and may differ for each share class. After-tax returns are &lt;/span&gt;</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="RetailMember_S000065529"
      id="x_2f6cdc1c-9216-4d86-b680-2213c8dbbd6b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;not relevant for a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="RetailMember_S000065529"
      id="e3d9fce5-1db5-4d2e-aee1-e0cb68c3311a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="RetailMember_S000002922"
      id="efb8871f-d7b0-46ed-83ac-ad106c1cb3cf">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="RetailMember_S000002922"
      id="x_0f9e1604-6799-4a75-bcbf-bbde8761b184">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="RetailMember_S000002922"
      id="x_604d2057-d778-477c-928f-063e3379fe06">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide long-term capital appreciation.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="RetailMember_S000002922"
      id="a4ec0b39-170b-4eb1-beca-c2c9e0d645a7">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="RetailMember_S000002922"
      id="x_146519f1-d2af-44aa-8c27-22d7cc55e1f2">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Investor Shares or Admiral Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="RetailMember_S000002922"
      id="cbf6ad4f-dbb1-4cfc-952e-d55fe9c7e4c9">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_9516b4b8-f7b7-4dc4-96f8-5e2d07cd7d89"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_9bbe3807-28bf-49c0-ad93-bffb8fc5b173"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="a39423a0-39c5-46d5-96e0-cc21b41c5696"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="db70cb1d-05ba-4c29-bd06-f806dcd9bd2e"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="f4abca07-942c-4bdb-b086-c4d2d27f88cb"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="bc052870-7afa-4efd-ab10-85d866be8564"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_81ee10db-a987-4ee6-95a6-02eecf127bab"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:RedemptionFeeOverRedemption
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_2597a05d-29db-4b60-b74e-664e994c5158"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000002922_C000008007"
      decimals="INF"
      id="x_10288c5c-3bef-425c-a1da-f8ab538d9108"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:MaximumAccountFee
      contextRef="RetailMember_S000002922_C000008008"
      decimals="INF"
      id="x_35ce6e42-f1ea-4c54-9ab3-747eb168be53"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="RetailMember_S000002922"
      id="x_70e58537-5aff-4e66-9e86-0a22f4249d0a">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="cf41010a-3385-4f76-8e14-893fcc1196ed"
      unitRef="pure">0.0033</rr:ManagementFeesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_2cc7532a-03bf-402e-a9c9-8d95500f0083"
      unitRef="pure">0.0028</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_751da2cb-a936-4a36-9b08-66ee4b7d57f7"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_44749efa-d889-4183-8e88-f742a0d763f9"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_978cc94d-3af5-461f-9c43-48eb18402c38"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_96fc10fd-1445-4847-b862-08cf0a3a3af1"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="b3fe787f-525e-439e-8a1f-5d2689263e4a"
      unitRef="pure">0.0034</rr:ExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_14481e44-4eb4-489b-aa15-bf3b394f5287"
      unitRef="pure">0.0029</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="RetailMember_S000002922"
      id="x_77b1e64f-3d4b-46cf-bc46-3120e54c00cf">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Examples&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="RetailMember_S000002922"
      id="x_98a378b9-711a-4fa5-bbc9-548cd47978ba">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following examples are intended to help you compare the cost of investing in the Fund&#x2019;s Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. These examples assume that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000002922_C000008007"
      decimals="INF"
      id="x_1ff1910d-d11a-403e-8d46-042d3e7ec02a"
      unitRef="USD">35</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000002922_C000008007"
      decimals="INF"
      id="x_6a162025-45d7-45ff-b15e-80a7f874fa37"
      unitRef="USD">109</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000002922_C000008007"
      decimals="INF"
      id="d4cba1fa-a834-4e68-85d3-9d06f2fbd193"
      unitRef="USD">191</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000002922_C000008007"
      decimals="INF"
      id="x_5dcbd8ba-82a4-45e1-b3f7-c7a4147735a6"
      unitRef="USD">431</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="RetailMember_S000002922_C000008008"
      decimals="INF"
      id="x_0a822f7e-7a27-4dbb-a75b-6b6abc9ddf29"
      unitRef="USD">30</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="RetailMember_S000002922_C000008008"
      decimals="INF"
      id="ad7ce611-c95b-40ed-9d94-0405ae0a5395"
      unitRef="USD">93</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="RetailMember_S000002922_C000008008"
      decimals="INF"
      id="x_0a21955b-5921-4f83-932d-7cebc6ef26b1"
      unitRef="USD">163</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="RetailMember_S000002922_C000008008"
      decimals="INF"
      id="x_8517e50b-c787-4186-89a4-cc2e9ff9b68d"
      unitRef="USD">368</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="RetailMember_S000002922"
      id="x_6356f206-08a2-40bb-9181-571d6a501a37">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="RetailMember_S000002922"
      id="e2c6fe66-ea96-46d9-ad6e-b326b88d80cf">&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;19&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="RetailMember_S000002922"
      decimals="4"
      id="x_47454934-4171-4053-9d09-2ad028a7be25"
      unitRef="pure">0.19</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="RetailMember_S000002922"
      id="x_78eb95ed-5338-4833-b3e6-1a8ff2befb44">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="RetailMember_S000002922"
      id="bbe830fd-9f30-46a1-940b-5d767fb1c06b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Under normal circumstances, the Fund invests at least 80% of its assets in the stocks of companies principally engaged in the development, production, or distribution of products and services related to the health care industry. These companies include, among others, pharmaceutical firms, medical supply companies, and businesses that operate hospitals and other health care facilities. The Fund may also consider companies engaged in medical, diagnostic, biochemical, and other research and development activities. The Fund&#x2019;s advisor strives for a balanced representation of the health care field, searching for the best values in the various subsectors of the industry. The Fund may invest up to 50% of its assets in foreign stocks.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="RetailMember_S000002922"
      id="x_4295ba3e-e108-451d-9c7d-d6f8f3d727dd">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="RetailMember_S000002922"
      id="x_8665e725-91b0-44fe-a9b1-4b87559170bf">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that there will be particular problems affecting an entire industry. Any fund that concentrates in a particular industry will generally be more volatile than a fund that invests more broadly. Because the Fund normally invests at least 80% of its assets in the stocks of companies related to the health care industry, the Fund&#x2019;s performance largely depends&#x2014;for better or for worse&#x2014;on the overall condition of this industry. The health care industry could be adversely affected by various political, regulatory, supply-and-demand, and other economic factors.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s investments in foreign stocks can be riskier than U.S. stock investments. Foreign stocks may be more volatile and less liquid than U.S. stocks. The prices of foreign stocks and the prices of U.S. stocks may move in opposite directions.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund tends to invest a high percentage of assets in its ten largest holdings, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Manager risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Country risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that world events&#x2014;such as political upheaval, financial troubles, or natural disasters&#x2014;will adversely affect the value of securities issued by companies in foreign countries. Because the Fund may invest a large portion of its securities of companies located in any one country or region, the Fund's performance may be hurt disproportionately by the poor performance of its investments in that&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;line-height:11.5pt;"&gt;  &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;area.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Currency risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of particular issuers as compared with diversified mutual funds.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="RetailMember_S000002922"
      id="a01b6eaf-6c5a-4a29-b331-af222c4c0836">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="RetailMember_S000002922"
      id="a392e9a3-a68a-4155-9736-fbfa1c56b5fd">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks or even a single stock. The Fund is considered nondiversified, which means that it may invest a greater percentage of its assets in the securities of particular issuers as compared with diversified mutual funds.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="RetailMember_S000002922"
      id="dc01afda-2151-4d1b-853a-4a6ecdfdc417">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="RetailMember_S000002922"
      id="c6e377ad-806d-45b9-9058-6d27b0cd7bb5">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="RetailMember_S000002922"
      id="x_5a7d2336-fe2d-4712-a54e-62a300240cd5">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of a relevant market index and another comparative index, which have investment characteristics similar to those of the Fund&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;. MSCI ACWI Health Care Index returns are adjusted for withholding taxes. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated performance &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;information is available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="RetailMember_S000002922"
      id="x_5780b1bc-057b-4e8c-a3bb-2e8aa35e29da">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of a relevant market index and another comparative index, which have investment characteristics similar to those of the Fund&lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="RetailMember_S000002922"
      id="x_97dca755-7938-4cb5-bb88-0278b327a96c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="RetailMember_S000002922"
      id="x_791789b0-a0f1-4a4b-bafa-a3140648326f">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="RetailMember_S000002922"
      id="b8153991-00ff-4733-b5e4-eee61cb243e6">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="RetailMember_S000002922"
      id="cb3191a6-d8bb-47a6-bca5-a3358cbc07e5">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Health Care Fund Investor Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="RetailMember_S000002922"
      id="e637c225-2ef1-4ca1-88ce-1fa83801d17b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="RetailMember_S000002922_C000008007"
      id="x_4e41ad01-e370-429a-8afa-201ed8325dec">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_7e69fac9-a351-4715-b7f7-d37ad779e1f6"
      unitRef="pure">0.1684</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="RetailMember_S000002922_C000008007"
      id="x_2f9357b7-ca18-4b34-9982-02c8ea70c3f7">2019-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="RetailMember_S000002922_C000008007"
      id="a67abf50-edb6-48f6-9832-435d5d9a400c">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_356c3e54-2431-42ef-a5d7-51be7eb3b314"
      unitRef="pure">-0.1118</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="RetailMember_S000002922_C000008007"
      id="x_75e86e67-9849-42f7-a471-04b6f278c71f">2018-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="RetailMember_S000002922"
      id="d5e42873-c72d-4cac-b8c8-e4fb52c2ecdd">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_9c0bd3db-ac3c-46e6-8f6f-d4ea5d3702dd"
      unitRef="pure">-0.0105</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="e297a6ef-0d09-4c42-bcaf-4ae7197c2f8e"
      unitRef="pure">0.0963</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002922_C000008007"
      decimals="4"
      id="x_5c2690ee-d056-476e-aee1-3904b2a9c52f"
      unitRef="pure">0.1358</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_3e933aaa-9952-42cc-a17e-42f5b1c32407"
      unitRef="pure">-0.0230</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="ca9c8a8a-44a5-4cdc-a79b-b1a537596f2a"
      unitRef="pure">0.0742</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_6d83b9b4-6859-43f8-aa86-a76ac4486cde"
      unitRef="pure">0.1122</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_8722025b-5452-4c18-a48e-7242df3e1f21"
      unitRef="pure">0.0024</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_74ac378a-0933-44fa-89e0-e304e45af4c7"
      unitRef="pure">0.0725</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002922_C000008007_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_9c326cbe-aff7-41b1-8f10-70ef04aa3a8f"
      unitRef="pure">0.1071</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_92b8346c-19b0-4a6a-8480-f611a713c129"
      unitRef="pure">-0.0101</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="de909ef1-64c7-45fb-bb84-8a8dcd20a038"
      unitRef="pure">0.0969</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002922_C000008008"
      decimals="4"
      id="x_26a2be4e-2108-4b84-b68c-6db948dde2b8"
      unitRef="pure">0.1364</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002922_MSCIACWIHealthCareIndexMember"
      decimals="4"
      id="c8c8273e-8e69-4cdb-8800-770cce9de8e1"
      unitRef="pure">-0.0614</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002922_MSCIACWIHealthCareIndexMember"
      decimals="4"
      id="be13580d-d78f-4578-848f-172e975a2c6f"
      unitRef="pure">0.0959</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002922_MSCIACWIHealthCareIndexMember"
      decimals="4"
      id="x_08a69c68-d7e4-4410-9f37-a8fe7f0d90ec"
      unitRef="pure">0.1167</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="RetailMember_S000002922_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_532f4e4d-ab04-463e-aa59-3a2600734fc7"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="RetailMember_S000002922_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="dbb37024-c075-41b3-b28d-a0cb76a889a1"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="RetailMember_S000002922_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_54b7172f-79e8-480a-af21-6e2228e4bfc0"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="RetailMember_S000002922"
      id="a0e744fb-dcd9-4f0d-9372-98072cda3915">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are shown only for the Investor &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Shares and may differ for each share class. After-tax returns are &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;not relevant for a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="RetailMember_S000002922"
      id="x_14b10fee-c7e4-40ca-91a9-95eeb5fe31b1">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableOneClassOfAfterTaxShown
      contextRef="RetailMember_S000002922"
      id="a354b1f8-c02a-4763-8825-3f03a405c845">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are shown only for the Investor &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Shares and may differ for each share class. After-tax returns are &lt;/span&gt;</rr:PerformanceTableOneClassOfAfterTaxShown>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="RetailMember_S000002922"
      id="x_8d1d551f-f6d3-49b2-9a28-d109cfa6419d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;not relevant for a &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="RetailMember_S000002922"
      id="d3f22e10-ccf0-4b61-89c5-8d2c8ae24028">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="InvestorMember_S000002924"
      id="c7292c0a-e747-4827-bf68-643d41805289">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="InvestorMember_S000002924"
      id="x_8652ecb3-2466-40fa-a872-6a8cc14b23c2">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="InvestorMember_S000002924"
      id="f579d66f-cd33-44ab-a1be-592e19db538c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide a high level of income and moderate long-term capital appreciation by tracking the performance of a benchmark index that measures the performance of publicly traded equity REITs and other real estate-related investments.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="InvestorMember_S000002924"
      id="x_49194b87-2472-4a1f-9cc6-3e1f722d72d5">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="InvestorMember_S000002924"
      id="b7ead285-056f-4954-9ce7-020e181c2416">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Investor Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="InvestorMember_S000002924"
      id="a3b48ace-42a4-45b8-af9e-68d8340dd583">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="e39e2376-add5-4d2b-aed8-6ea50c33d58f"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_3ada4e51-5aa2-4e3f-bb85-34b47bc0dc8d"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="b2cf2d74-73cf-4b51-bcaf-c7ee7e9bf08a"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_29e3340e-0d89-4c40-b0a7-af3dd1cde086"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="INF"
      id="e1a11c5b-18bb-41e1-81aa-09ad24492d76"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="InvestorMember_S000002924"
      id="x_7d9b0f97-e982-4281-a17c-50e49cde23ae">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="b4a1b251-40bd-4a32-a5b1-de19ecead337"
      unitRef="pure">0.0024</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="d85f929f-a4a4-4695-8a4e-f7c5711de233"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_56b4101b-432b-4be9-a16d-e0a8688cbcca"
      unitRef="pure">0.0002</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="fa7c0b2f-4a8d-4f58-8f67-2c9c6ee95f30"
      unitRef="pure">0.0026</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="InvestorMember_S000002924"
      id="x_396325e7-b088-4cbc-b501-9d2ccd602d3a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="InvestorMember_S000002924"
      id="fe41c1c9-e230-4cfd-ba06-0b12abf2a3f6">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund&#x2019;s Investor Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="INF"
      id="b66e9633-a6ce-4523-8339-2eb1f3bdc78f"
      unitRef="USD">27</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="INF"
      id="b8134889-109f-4a65-bfce-ee6c2a53af1b"
      unitRef="USD">84</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="INF"
      id="x_97e63b97-1e85-4369-9fd0-be5e7e0df4b1"
      unitRef="USD">146</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="INF"
      id="d1a8db33-f622-4160-91b4-d31325fb1d34"
      unitRef="USD">331</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="InvestorMember_S000002924"
      id="x_9f898aac-8265-4e09-951d-39f6d504819b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="InvestorMember_S000002924"
      id="e75c102f-9a34-466a-a44a-d2a5cb930716">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&lt;span style="-sec-ix-hidden:bc9044c9-441e-425b-9f45-76943868063a"&gt;7&lt;/span&gt;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:StrategyHeading
      contextRef="InvestorMember_S000002924"
      id="x_4f61055d-7f2e-4d74-824d-b7295c78d071">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="InvestorMember_S000002924"
      id="x_8120ec6d-1ba0-43ca-af90-547400ea9b0e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Real Estate 25/50 Index, an index that is made up of stocks of large, mid-size, and small U.S. companies within the real estate sector, as classified under the Global Industry Classification Standard (GICS). The GICS real estate sector is composed of equity real estate investment trusts (known as REITs), which include specialized REITs, and real estate management and development companies.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund attempts to track the Index by investing all, or substantially all, of its assets&#x2014;either directly or indirectly through a wholly owned subsidiary (the underlying fund), which is itself a registered investment company&#x2014;in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The Fund may invest a portion of its assets in the underlying fund.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="InvestorMember_S000002924"
      id="bdde8464-a327-4900-94a4-fc3ba3b85fbf">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="InvestorMember_S000002924"
      id="x_8c5ee971-0b88-474b-b729-04262e2627b1">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the stocks of REITs and other real estate-related investments will decline because of adverse developments affecting the real estate industry and real property values. Because the Fund concentrates its assets in these stocks, industry concentration risk is high.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Interest rate risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that REIT stock prices overall will decline and that the cost of borrowing for REITs will increase because of rising interest rates. Interest rate risk is high for the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s target index may, at times, become focused in stocks of a limited number of companies, which could cause the Fund to underperform the overall stock market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund&#x2019;s target index (and therefore the Fund) tends to be heavily weighted in its ten largest holdings, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from the stocks of REITs and other real estate-related investments&#x2014;which typically are small- or mid-capitalization stocks&#x2014;will trail returns from the overall stock market. Historically, these stocks have performed quite differently from the overall market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Index replicating risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may be prevented from holding one or more securities in the same proportion as in its target index.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="InvestorMember_S000002924"
      id="x_365b1b66-3401-41fc-8b4f-25949a8be622">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="InvestorMember_S000002924"
      id="a6048dbe-7fe8-4d2b-b2ec-a00b409775f9">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="InvestorMember_S000002924"
      id="f5642aac-f82d-4d2f-af50-ad9927ce1820">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="InvestorMember_S000002924"
      id="e86bdaf1-8072-4823-aecd-5dda16e6b454">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="InvestorMember_S000002924"
      id="f7455c30-3266-436d-b6bd-f54a99490143">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Investor Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Effective July 24, 2018, the Fund began tracking the MSCI US Investable Market Real Estate 25/50 Index as its target index. The inception date for the MSCI US Investable Market Real Estate 25/50 Index was September 1, 2016. Index returns are not provided prior to that date. The Real Estate Spliced Index reflects the performance of the MSCI US REIT Index through February 1 2018; the MSCI US Investable Market Real Estate 25/50 Transition Index through July 24, 2018; and the MSCI US Investable Market Real Estate 25/50 Index thereafter. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated performance information is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="InvestorMember_S000002924"
      id="f3b0e366-e38a-4d3c-9435-efe23eff98eb">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Investor Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="InvestorMember_S000002924"
      id="x_3c577986-dc4c-4a64-90aa-770aca5388b3">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="InvestorMember_S000002924"
      id="x_2101410b-10a0-4882-bf43-4a8f17ae2437">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="InvestorMember_S000002924"
      id="x_881c4b8a-3d3a-46e6-919e-af89efb45c03">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="InvestorMember_S000002924"
      id="x_966ec5a0-f807-482a-86b0-96b2e262a3e7">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Real Estate Index Fund Investor Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="InvestorMember_S000002924"
      id="ac9af97b-4b6c-45f0-a70f-b4f566b8b1f4">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="InvestorMember_S000002924_C000008010"
      id="x_1853e94c-4cf3-4fb3-b60c-08c4e5078ff5">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_85666473-c384-4ff7-9c62-25074edeff2e"
      unitRef="pure">0.1725</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="InvestorMember_S000002924_C000008010"
      id="x_80a97376-244b-48ef-b483-8fa7fc145145">2019-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="InvestorMember_S000002924_C000008010"
      id="c55d686d-601e-4396-a0ee-79c1a814b325">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_8b79f6ee-e681-4868-a358-b857d50a206c"
      unitRef="pure">-0.2414</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="InvestorMember_S000002924_C000008010"
      id="fb52af7d-a15d-43aa-97e5-e26be1810c0d">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="InvestorMember_S000002924"
      id="x_87e64a1d-09f0-4fed-a5dc-713b80fb70f5">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_4628e566-1309-4f10-b2a4-00d4345f36f6"
      unitRef="pure">-0.2630</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="x_4c1183a1-610a-4c1b-99f4-a7db81dd472d"
      unitRef="pure">0.0353</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002924_C000008010"
      decimals="4"
      id="f84aa417-b168-48c8-9f16-ed6ef134e66d"
      unitRef="pure">0.0628</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_67f5d52c-43f5-47c1-842c-e67c83a17c74"
      unitRef="pure">-0.2699</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_453d1297-9560-4ce9-9abb-f15ef004efe1"
      unitRef="pure">0.0254</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="d5a659a7-4051-40cc-bf43-96677f140230"
      unitRef="pure">0.0514</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="bc7bfe6f-8b7a-47d6-92ef-7de9aaad8bc2"
      unitRef="pure">-0.1554</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_740a00ed-b565-4be4-92f6-97a5ef0b6e0c"
      unitRef="pure">0.0233</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002924_C000008010_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="b243ba53-423a-431a-aa42-9f530067efcd"
      unitRef="pure">0.0448</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="x_3502888d-8243-4f7d-9043-73e51ff0c694"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="x_72867981-a89d-4933-9226-936edb3c8d99"
      unitRef="pure">0.0378</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="x_505f3e00-9258-4723-89c7-861edfe59b9f"
      unitRef="pure">0.0652</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="abf92430-b959-49cd-bc0a-e72cf0f2e2eb"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="cbf2ce79-f5a6-4078-accd-ae76bec6a4db"
      unitRef="pure">0.0406</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear01
      contextRef="InvestorMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_898fcbac-16cb-4fd5-885d-7e4acac7c6bb"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InvestorMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="d69d73f0-671d-4302-97da-2dab716d669d"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InvestorMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="eab93460-a1cf-480d-ad62-0054121f3367"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="InvestorMember_S000002924"
      id="x_03849785-826b-415b-b255-ced3f07499be">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="InvestorMember_S000002924"
      id="d596669d-c5dc-4181-a309-781d8cba06cc">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="InvestorMember_S000002924"
      id="x_4c2e57e2-51f2-4e2e-a6e5-305dc69e0cbe">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="InvestorMember_S000002924"
      id="ec35ea1c-ccff-4668-946a-e706b4fc4dba">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="AdmiralMember_S000002924"
      id="x_258da84e-73c7-4115-b7c5-f0cdfb621838">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="AdmiralMember_S000002924"
      id="x_1e3c2dac-2713-40f8-bd89-01b97d09f5b7">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="AdmiralMember_S000002924"
      id="b78cf1d2-f751-4f7a-be88-1ded60958896">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide a high level of income and moderate long-term capital appreciation by tracking the performance of a benchmark index that measures the performance of publicly traded equity REITs and other real estate-related investments.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="AdmiralMember_S000002924"
      id="x_1162118c-8dc3-4f30-8f50-4277677b9ffb">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="AdmiralMember_S000002924"
      id="b815d2d4-e9b9-4600-ad30-6aa1dda0fa2d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Admiral Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="AdmiralMember_S000002924"
      id="x_382d9331-7c0a-4911-aee0-5b7b28603dc2">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_98636955-4b7f-4d5d-b9f8-960bd1549b6c"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_0399d401-38e9-4505-844e-bb276a881799"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="fec2c065-9ed9-4139-9fdb-9ed7e9973d80"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_6a47ac57-6fe0-4e2f-b85d-c3e555678512"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:MaximumAccountFee
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="INF"
      id="x_05e8e6d4-be0b-4a1a-8270-a23ad1a66589"
      unitRef="USD">20</rr:MaximumAccountFee>
    <rr:OperatingExpensesCaption
      contextRef="AdmiralMember_S000002924"
      id="x_309b1269-507f-41f3-a9b7-d4231254df76">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_971bc97f-a882-4447-869d-3bd22aae78e5"
      unitRef="pure">0.0011</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="a1cfedd0-94e7-4e7e-aa38-691677b38fb0"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_01b476d9-1a16-4df1-9115-caf5e275bbe4"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_39d4fea7-f667-4799-9a12-ab5ec163b674"
      unitRef="pure">0.0012</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="AdmiralMember_S000002924"
      id="e6753df6-4a8c-4ae1-957b-563c29387ed1">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="AdmiralMember_S000002924"
      id="ae9613c3-cd82-4c11-9e5a-d9a783b6e562">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund&#x2019;s Admiral Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="INF"
      id="x_763ecfee-1feb-42b8-abb5-b0966ae65cf0"
      unitRef="USD">12</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="INF"
      id="x_1e8b61fb-0892-4227-9c7f-c4d79c3a8f6a"
      unitRef="USD">39</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="INF"
      id="e58c6495-a6e8-40a0-9d92-c388a6b54c3e"
      unitRef="USD">68</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="INF"
      id="x_63fd33a2-1b9a-467e-9a61-073a555ea62c"
      unitRef="USD">154</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="AdmiralMember_S000002924"
      id="x_60cdd8aa-bccd-4dfd-b93d-25288f0d421c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="AdmiralMember_S000002924"
      id="ce7c27e9-11a9-4f7b-bbf4-d82cace3e61e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&lt;span style="-sec-ix-hidden:x_08b060cb-1112-49f8-b9d8-d396077971e9"&gt;7&lt;/span&gt;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:StrategyHeading
      contextRef="AdmiralMember_S000002924"
      id="x_9aa660e3-5986-49fd-a04c-e309482d856f">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="AdmiralMember_S000002924"
      id="e16735c2-e2a8-4f53-aebf-904484aeda76">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Real Estate 25/50 Index, an index that is made up of stocks of large, mid-size, and small U.S. companies within the real estate sector, as classified under the Global Industry Classification Standard (GICS). The GICS real estate sector is composed of equity real estate investment trusts (known as REITs), which include specialized REITs, and real estate management and development companies.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund attempts to track the Index by investing all, or substantially all, of its assets&#x2014;either directly or indirectly through a wholly owned subsidiary (the underlying fund), which is itself a registered investment company&#x2014;in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The Fund may invest a portion of its assets in the underlying fund.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="AdmiralMember_S000002924"
      id="c31d7766-2f52-4d32-9f4d-ed18cf8a7351">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="AdmiralMember_S000002924"
      id="x_2f51b3e7-ab25-43a0-8725-d14c43086598">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the stocks of REITs and other real estate-related investments will decline because of adverse developments affecting the real estate industry and real property values. Because the Fund concentrates its assets in these stocks, industry concentration risk is high.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Interest rate risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that REIT stock prices overall will decline and that the cost of borrowing for REITs will increase because of rising interest rates. Interest rate risk is high for the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s target index may, at times, become focused in stocks of a limited number of companies, which could cause the Fund to underperform the overall stock market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund&#x2019;s target index (and therefore the Fund) tends to be heavily weighted in its ten largest holdings, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from the stocks of REITs and other real estate-related investments&#x2014;which typically are small- or mid-capitalization stocks&#x2014;will trail returns from the overall stock market. Historically, these stocks have performed quite differently from the overall market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Index replicating risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may be prevented from holding one or more securities in the same proportion as in its target index.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="AdmiralMember_S000002924"
      id="a96477ff-9db0-4d32-8fc7-cf17d0fdb4cd">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="AdmiralMember_S000002924"
      id="x_93e63c1a-7fb7-4443-b45b-99432d2df61d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="AdmiralMember_S000002924"
      id="ee94b66a-061d-4c7f-a16b-bcae0467d42c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="AdmiralMember_S000002924"
      id="f1067ff8-4513-47ff-9a18-03881323799a">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="AdmiralMember_S000002924"
      id="d8e26207-5b31-48f0-b7a1-4b537cedc60a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Effective July 24, 2018, the Fund began tracking the MSCI US Investable Market Real Estate 25/50 Index as its target index. The inception date for the MSCI US Investable Market Real Estate 25/50 Index was September 1, 2016. Index returns are not provided prior to that date. The Real Estate Spliced Index reflects the performance of the MSCI US REIT Index through February 1, 2018; the MSCI US Investable Market Real Estate 25/50 Transition Index through July 24, 2018; and the MSCI US Investable Market Real Estate 25/50 Index thereafter. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after taxes) does not &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated performance &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;information is available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="AdmiralMember_S000002924"
      id="x_8c3a6dfb-5677-463e-91cc-929f395348d6">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Admiral Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Admiral Shares compare with those of the Fund's target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="AdmiralMember_S000002924"
      id="x_450be687-a72e-4b02-bbf8-f106b59f42ac">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after taxes) does not &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="AdmiralMember_S000002924"
      id="x_26a7374e-23a1-4e04-a0fc-5c46048a63c7">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="AdmiralMember_S000002924"
      id="e8d301c4-ab8a-4e12-8edd-5550c6487add">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="AdmiralMember_S000002924"
      id="ae3b4192-a9fc-4251-863b-53e29d8cc3f8">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Real Estate Index Fund Admiral Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="AdmiralMember_S000002924"
      id="x_9bdc7440-bb81-4a01-b3cc-8c1747dad6a4">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="AdmiralMember_S000002924_C000008011"
      id="d46d59a3-4f22-469a-83e3-1243882caac9">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_513510a8-87fd-4850-9ce1-c2dda77c2655"
      unitRef="pure">0.1728</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="AdmiralMember_S000002924_C000008011"
      id="x_70bf3421-c05f-4d7c-b46e-9b601d7ec73b">2019-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="AdmiralMember_S000002924_C000008011"
      id="f5aaf441-5466-4987-b437-f6aa1246a6a9">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_9c4d4678-7290-43ba-99a0-be8d797aae4d"
      unitRef="pure">-0.2410</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="AdmiralMember_S000002924_C000008011"
      id="x_954a2a69-a422-4a6d-a53b-2ac14f6ed160">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="AdmiralMember_S000002924"
      id="cd3e647a-3111-4430-b53e-b0ac0117fdda">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_3aa44ca1-61f2-415d-bff4-37d843987006"
      unitRef="pure">-0.2620</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="db3d8fa5-4374-466e-9e9a-ad4229548ced"
      unitRef="pure">0.0368</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="AdmiralMember_S000002924_C000008011"
      decimals="4"
      id="x_05748ae4-e207-4499-9815-8fd83f44c41c"
      unitRef="pure">0.0642</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_001e031a-b97f-4ff2-936d-cabef995b89d"
      unitRef="pure">-0.2692</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="d681f93d-72e9-4084-8cb9-64c7f1a65507"
      unitRef="pure">0.0265</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_30cb5bdb-85dd-46e3-9efd-d85feb6e1cff"
      unitRef="pure">0.0524</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="a068fc12-30f1-4d75-abb8-12c1c56ab515"
      unitRef="pure">-0.1548</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="cad07578-17c6-4c6c-827e-8c9abf3322e2"
      unitRef="pure">0.0242</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="AdmiralMember_S000002924_C000008011_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_6724d153-4da2-43ef-9ef0-68e9871477c6"
      unitRef="pure">0.0458</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="x_21f8cda2-2de4-4685-abcb-2450546d0b54"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="x_083851fd-99a2-447e-bf06-72d71008b392"
      unitRef="pure">0.0378</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="AdmiralMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="bfacc1e0-06bf-430d-ac64-3bcc5dd740d4"
      unitRef="pure">0.0652</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="a9811937-46ea-4777-ba1c-fa64fe1f9deb"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="d476c1a3-ca8d-4cd5-b575-8a63e04455e1"
      unitRef="pure">0.0406</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear01
      contextRef="AdmiralMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="df231a93-b43f-4b51-a5bb-146bd4f31a8b"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="AdmiralMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_7d1248a9-2400-4189-be4d-6fe3b45965c3"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="AdmiralMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_49574a03-b4b4-4db5-b465-10d200a28c2e"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="AdmiralMember_S000002924"
      id="x_99dabcfa-9636-4fb1-b2db-fe1633a7ab35">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="AdmiralMember_S000002924"
      id="x_02513ac0-887e-4ec7-b3b6-9fc7396ab188">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="AdmiralMember_S000002924"
      id="x_8058a092-34e8-4fe2-a7bb-c692d34c662c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="AdmiralMember_S000002924"
      id="d81096bd-8548-46df-8da6-891caee74b1e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="InstitutionalMember_S000002924"
      id="ef031373-57a5-44c4-8c63-0b32939b7b0d">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;Fund Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="InstitutionalMember_S000002924"
      id="fa6d2c09-c812-4060-ae45-1bbaaa877da8">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="a812b703-f981-4475-8f8e-56367a92eb7e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide a high level of income and moderate long-term capital appreciation by tracking the performance of a benchmark index that measures the performance of publicly traded equity REITs and other real estate-related investments.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="InstitutionalMember_S000002924"
      id="x_462fcfda-86f9-4921-9a41-da24d30cedda">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="x_980e1fd6-4d67-433e-9c5b-417b5720a6d5">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell Institutional Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="InstitutionalMember_S000002924"
      id="a7fe5a06-2ee8-4996-be0a-431bc98e9067">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="c69020fb-e610-4f27-80ef-c64a20a88300"
      unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
    <rr:MaximumCumulativeSalesChargeOverOther
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_8f594cac-e7e7-4389-8d29-f0fc484b7454"
      unitRef="pure">0</rr:MaximumCumulativeSalesChargeOverOther>
    <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="bd7cac96-59e6-41bd-adff-25be822afff1"
      unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
    <rr:RedemptionFeeOverRedemption
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_511bc4cf-b3bc-4278-bf63-8c321f2d4a63"
      unitRef="pure">0</rr:RedemptionFeeOverRedemption>
    <rr:OperatingExpensesCaption
      contextRef="InstitutionalMember_S000002924"
      id="ce266b5c-6811-49a8-b3d9-5332e3fc9de4">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_14b82c90-d989-4f62-95e9-2f4f2a294dd4"
      unitRef="pure">0.0009</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="d2c12e9d-0ad9-4413-9f1f-d4ba05e83976"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_2de8ac5f-794a-4cc4-849c-fb397287aa7c"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_5e47761b-d013-4f02-bb7d-301f2415094f"
      unitRef="pure">0.0010</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="InstitutionalMember_S000002924"
      id="x_197b211a-a6f3-4683-8fb8-7418acb862df">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="x_259e2a38-e853-4eef-bd96-02185546eb73">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund&#x2019;s Institutional Shares with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="INF"
      id="x_1f8a9c8b-2d45-4e53-9262-6f9caeb53974"
      unitRef="USD">10</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="INF"
      id="e37752a4-f9f5-4bf4-b532-0a85ae76557d"
      unitRef="USD">32</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="INF"
      id="x_0741e577-8af9-4b5a-920d-77e314763623"
      unitRef="USD">56</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="INF"
      id="x_6f3233cc-05bc-4ab1-a213-96578580cd2e"
      unitRef="USD">128</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="InstitutionalMember_S000002924"
      id="fed1df7a-1e4c-4e51-9941-f4ca481a4938">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="c4f5f82b-506e-4957-817b-28eb28258d2e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&lt;span style="-sec-ix-hidden:f0ec9f1f-8577-44e5-b525-eb2db763b773"&gt;7&lt;/span&gt;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:StrategyHeading
      contextRef="InstitutionalMember_S000002924"
      id="x_98ac8a98-1d29-40c5-af67-1ca7881d38e3">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="x_9d06d3b2-f07f-4d25-9579-0c3d8ef03850">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Real Estate 25/50 Index, an index that is made up of stocks of large, mid-size, and small U.S. companies within the real estate sector, as classified under the Global Industry Classification Standard (GICS). The GICS real estate sector is composed of equity real estate investment trusts (known as REITs), which include specialized REITs, and real estate management and development companies.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund attempts to track the Index by investing all, or substantially all, of its assets&#x2014;either directly or indirectly through a wholly owned subsidiary (the underlying fund), which is itself a registered investment company&#x2014;in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The Fund may invest a portion of its assets in the underlying fund.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="InstitutionalMember_S000002924"
      id="b5737982-6b43-4616-9ace-fe0c8a7c1281">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="x_26b976cf-add6-448d-88a4-afb308c0e440">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the stocks of REITs and other real estate-related investments will decline because of adverse developments affecting the real estate industry and real property values. Because the Fund concentrates its assets in these stocks, industry concentration risk is high.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Interest rate risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that REIT stock prices overall will decline and that the cost of borrowing for REITs will increase because of rising interest rates. Interest rate risk is high for the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s target index may, at times, become focused in stocks of a limited number of companies, which could cause the Fund to underperform the overall stock market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund&#x2019;s target index (and therefore the Fund) tends to be heavily weighted in its ten largest holdings, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from the stocks of REITs and other real estate-related investments&#x2014;which typically are small- or mid-capitalization stocks&#x2014;will trail returns from the overall stock market. Historically, these stocks have performed quite differently from the overall market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Index replicating risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may be prevented from holding one or more securities in the same proportion as in its target index.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="InstitutionalMember_S000002924"
      id="d8e1a9f1-4064-4e7f-a8f1-6c26f3108989">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="InstitutionalMember_S000002924"
      id="x_36243862-dc7e-41c2-8760-662d9634fc82">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="InstitutionalMember_S000002924"
      id="x_722a1353-3895-4a93-a536-ee0d22aaa83c">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="InstitutionalMember_S000002924"
      id="b815c983-9f7b-495d-8d83-edc1396f5114">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="x_3b12e06f-d874-4d8a-b8ff-36b600ad279a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of the Fund&#x2018;s target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Effective July 24, 2018, the Fund began tracking the MSCI US &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Investable Market Real Estate 25/50 Index as its target index. The inception date for the MSCI US Investable Market Real Estate 25/50 Index was September 1, 2016. Index returns are not provided prior to that date. The Real Estate Spliced Index reflects the performance of the MSCI US REIT Index through February 1, 2018; the MSCI US Investable Market Real Estate 25/50 Transition Index through July 24, 2018; and the MSCI US Investable Market Real Estate 25/50 Index thereafter. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;performance information is available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="InstitutionalMember_S000002924"
      id="x_9d1bfa78-1f3e-4cf7-a175-66641ce94cfe">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of the Fund&#x2018;s target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="InstitutionalMember_S000002924"
      id="x_32154716-06c9-4b4b-8f54-182b9eb0b864">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="InstitutionalMember_S000002924"
      id="x_1d114cb5-e9c0-46b5-978d-037fe9547589">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="InstitutionalMember_S000002924"
      id="x_9a5b897c-a014-4104-ac28-b94e2be7dadc">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="InstitutionalMember_S000002924"
      id="x_21c2d465-2395-46df-8559-2a433979b021">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Real Estate Index Fund Institutional Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="f4cb178f-cdc4-486e-b725-59e2095dddb2">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="InstitutionalMember_S000002924_C000008012"
      id="a7b21949-cfd1-4ed5-9828-524767abeac2">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_9e1bbce1-c688-463a-b345-447a55cd4c1e"
      unitRef="pure">0.1728</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="InstitutionalMember_S000002924_C000008012"
      id="x_7b3865a2-15da-430d-9de0-9ae641e2bf46">2019-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="InstitutionalMember_S000002924_C000008012"
      id="x_975db836-5f55-41e9-9495-9045a7574e08">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="cc48f27f-d094-4755-b6f8-2a1b2f043ce8"
      unitRef="pure">-0.2410</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="InstitutionalMember_S000002924_C000008012"
      id="x_5958b716-6306-4527-889a-0ea3667f28f7">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="InstitutionalMember_S000002924"
      id="a1344c79-d231-4420-96d2-e7b6deb868c1">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_90c59b53-31fe-480a-8554-6e7c9635a886"
      unitRef="pure">-0.2617</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="a8049ebc-3891-44bd-b0d2-09e5e15dc575"
      unitRef="pure">0.0371</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InstitutionalMember_S000002924_C000008012"
      decimals="4"
      id="x_99841c0d-0208-417e-9d5a-e6bed8442437"
      unitRef="pure">0.0645</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_0133c86b-10d3-4094-aaae-a8e566413a7f"
      unitRef="pure">-0.2689</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="a99f2364-94fe-4ec3-b5e9-ea514ae58c30"
      unitRef="pure">0.0267</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_1862edc4-0338-4c11-9bcd-a80e942f0ab0"
      unitRef="pure">0.0526</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="cc691203-de35-4514-b21f-c200460130e1"
      unitRef="pure">-0.1546</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_06aa7db4-f5cf-4412-9e76-748e12523a67"
      unitRef="pure">0.0244</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InstitutionalMember_S000002924_C000008012_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="e9a8dda6-0deb-40a5-88f1-d7efc1f3bf7a"
      unitRef="pure">0.0459</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InstitutionalMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="c3fe9d28-0f38-4150-8fee-5cf425595ddd"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InstitutionalMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="c5d5490e-931a-4354-86e2-669dc0080cb7"
      unitRef="pure">0.0378</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InstitutionalMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="x_74f32f2f-0c7c-475e-a9f4-be5cca47d927"
      unitRef="pure">0.0652</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="InstitutionalMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="cab85d83-d197-48a2-8cc4-1a4e09b6e5a2"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InstitutionalMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="d6c3a6db-3c2b-49f5-b942-e9414ada10d0"
      unitRef="pure">0.0406</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear01
      contextRef="InstitutionalMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="ab663895-68b1-4f04-86c2-18fb72549cd6"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="InstitutionalMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_35137145-3380-4fff-b0ee-abb7f895d4a3"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="InstitutionalMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_210ad2cb-2b88-4101-8ec7-d9e857b948eb"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="InstitutionalMember_S000002924"
      id="d4cda029-e983-4869-aa9e-244a43f3ecf3">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="InstitutionalMember_S000002924"
      id="c7fff601-7e16-4474-a04c-40a9cedb4785">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="InstitutionalMember_S000002924"
      id="e7f8844b-48cd-4c22-b5ed-de7bc6ea4e8d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="InstitutionalMember_S000002924"
      id="x_2922a5d5-f52c-4abd-b59c-12dbb946c7d5">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <rr:RiskReturnHeading
      contextRef="ETFMember_S000002924"
      id="a99654ac-b598-45db-9031-944577774e80">&lt;span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;"&gt;ETF Summary&lt;/span&gt;</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="ETFMember_S000002924"
      id="x_048e50b9-be12-4480-9b1f-2dfbffd2d71a">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="ETFMember_S000002924"
      id="x_785d247a-7ec0-40c8-9b70-d2c65db1f2d7">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund seeks to provide a high level of income and moderate long-term capital appreciation by tracking the performance of a benchmark index that measures the performance of publicly traded equity REITs and other real estate-related investments.&lt;/span&gt;</rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="ETFMember_S000002924"
      id="x_547051ff-f23b-48cb-80c3-eb8dc6d96332">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Fees and Expenses&lt;/span&gt;</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="ETFMember_S000002924"
      id="x_9aa6b154-419a-46e4-bc9e-5c6cd7864048">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following table describes the fees and expenses you may pay if you buy, hold, and sell ETF Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.&lt;/span&gt;</rr:ExpenseNarrativeTextBlock>
    <rr:ShareholderFeesCaption
      contextRef="ETFMember_S000002924"
      id="x_1a043efb-a0d7-4150-bccb-cc1d350e634d">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Shareholder Fees&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Fees paid directly from your investment)&lt;/span&gt;</rr:ShareholderFeesCaption>
    <specialized:TransactionFeeOnPurchasesandSales
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="x_612f4d7b-a906-4e40-8fdc-da6e729bf7f9"
      unitRef="USD">0</specialized:TransactionFeeOnPurchasesandSales>
    <specialized:TransactionFeeOnReinvestedDividends
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="bdb49170-69d7-4d9e-814e-c72c55b19312"
      unitRef="USD">0</specialized:TransactionFeeOnReinvestedDividends>
    <specialized:TransactionFeeOnConversionToETFShares
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="fa2dffc9-8e7b-40c8-998b-e9d20e053cf6"
      unitRef="USD">0</specialized:TransactionFeeOnConversionToETFShares>
    <rr:OperatingExpensesCaption
      contextRef="ETFMember_S000002924"
      id="cb483709-7209-4b66-9f4f-b10e8ba292be">&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&lt;/span&gt;
&lt;br/&gt;&lt;span style="color:#000000;font-family:Arial;font-size:8.5pt;margin-left:0%;"&gt;(Expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_6863fea1-ebbc-46d7-8d60-b16d081427a0"
      unitRef="pure">0.0011</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="f95fc59f-b658-493e-b4b5-bd7e2355f997"
      unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_19ee5e07-c8cd-4de5-8665-b4063b1b2df9"
      unitRef="pure">0.0001</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_6822ea4f-d0d1-4d38-bf4a-4ed1bc2eb857"
      unitRef="pure">0.0012</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="ETFMember_S000002924"
      id="x_182ab955-9c6a-4b8c-92ef-f7f80ab59e00">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Example&lt;/span&gt;</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="ETFMember_S000002924"
      id="x_377fbe96-21b6-4772-be73-dc4592d67633">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following example is intended to help you compare the cost of investing in the Fund&#x2019;s ETF Shares with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. This example assumes that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to sell your shares at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/span&gt;</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="x_4ce08343-35aa-4357-a76a-c8a5cdaf006d"
      unitRef="USD">12</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="x_668f3b90-d629-441d-a69b-5c44ad33347e"
      unitRef="USD">39</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="x_8974a3b8-9649-40be-b94e-5041404dea8a"
      unitRef="USD">68</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="ETFMember_S000002924_C000032424"
      decimals="INF"
      id="a075e960-29eb-4542-98e5-3948782c2e8c"
      unitRef="USD">154</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleClosingTextBlock
      contextRef="ETFMember_S000002924"
      id="x_4002ff93-6b8f-4a3c-a322-786b6d39e133">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund.&lt;/span&gt;</rr:ExpenseExampleClosingTextBlock>
    <rr:PortfolioTurnoverHeading
      contextRef="ETFMember_S000002924"
      id="a4b14403-ed78-43f6-9fed-693ef092235d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Portfolio Turnover&lt;/span&gt;</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="ETFMember_S000002924"
      id="x_40dea79e-e608-45df-80f5-deee63c39da5">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&lt;span style="-sec-ix-hidden:x_07da8870-9e27-4c43-b9df-116ea4794795"&gt;7&lt;/span&gt;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;% of the average value of its portfolio.&lt;/span&gt;</rr:PortfolioTurnoverTextBlock>
    <rr:StrategyHeading
      contextRef="ETFMember_S000002924"
      id="x_35ba90b0-5273-4367-82d2-c43c30e26fc1">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="ETFMember_S000002924"
      id="x_742b8754-689b-4ea6-8fab-05d47ed31cb4">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund employs an indexing investment approach designed to track the performance of the MSCI US Investable Market Real Estate 25/50 Index, an index that is made up of stocks of large, mid-size, and small U.S. companies within the real estate sector, as classified under the Global Industry Classification Standard (GICS). The GICS real estate sector is composed of equity real estate investment trusts (known as REITs), which include specialized REITs, and real estate management and development companies.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The Fund attempts to track the Index by investing all, or substantially all, of its assets&#x2014;either directly or indirectly through a wholly owned subsidiary (the underlying fund), which is itself a registered investment company&#x2014;in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The Fund may invest a portion of its assets in the underlying fund.&lt;/span&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="ETFMember_S000002924"
      id="x_66c24cc2-a4fc-4c02-94c4-81410f4868da">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Principal Risks&lt;/span&gt;</rr:RiskHeading>
    <rr:RiskNarrativeTextBlock
      contextRef="ETFMember_S000002924"
      id="x_66750e7d-f06c-4ed8-9060-629c2129c31d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Industry concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the stocks of REITs and other real estate-related investments will decline because of adverse developments affecting the real estate industry and real property values. Because the Fund concentrates its assets in these stocks, industry concentration risk is high.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Interest rate risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that REIT stock prices overall will decline and that the cost of borrowing for REITs will increase because of rising interest rates. Interest rate risk is high for the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Stock market risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The Fund&#x2019;s target index may, at times, become focused in stocks of a limited number of companies, which could cause the Fund to underperform the overall stock market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Asset concentration risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that, because the Fund&#x2019;s target index (and therefore the Fund) tends to be heavily weighted in its ten largest holdings, the Fund&#x2019;s performance may be hurt disproportionately by the poor performance of relatively few stocks.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Investment style risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that returns from the stocks of REITs and other real estate-related investments&#x2014;which typically are small- or mid-capitalization stocks&#x2014;will trail returns from the overall stock market. Historically, these stocks have performed quite differently from the overall market.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Index replicating risk&lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may be prevented from holding one or more securities in the same proportion as in its target index.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Because ETF Shares are traded on an exchange, they are subject to additional risks:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;The Fund&#x2019;s ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;you may pay more or less than NAV when you buy ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;Although the Fund&#x2019;s ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;&#x2022;&#x2002;Trading of the Fund&#x2019;s ETF Shares may be halted by the activation of individual or marketwide trading halts (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of the Fund&#x2019;s ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or for the protection of investors.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNarrativeTextBlock>
    <rr:RiskLoseMoney
      contextRef="ETFMember_S000002924"
      id="x_6c98c66d-cd8a-4aa4-a75f-056cd284d129">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;An investment in the Fund could lose money over short or long periods of time.&lt;/span&gt;</rr:RiskLoseMoney>
    <rr:RiskNondiversifiedStatus
      contextRef="ETFMember_S000002924"
      id="e832aa6f-dcb5-4cba-b39a-f5b96e85fd3b">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Nondiversification risk&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;, which is the chance that the Fund may invest a greater percentage of its assets in a particular issuer or group of issuers or may own larger positions of an issuer&#x2019;s voting stock than a diversified fund.&lt;/span&gt;</rr:RiskNondiversifiedStatus>
    <rr:RiskNotInsuredDepositoryInstitution
      contextRef="ETFMember_S000002924"
      id="ce98074f-e238-4332-b376-f0e594ef5dd3">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-weight:bold;"&gt;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.&lt;/span&gt;</rr:RiskNotInsuredDepositoryInstitution>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="ETFMember_S000002924"
      id="x_4f859b85-5e74-442d-82d6-22730080c384">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Annual Total Returns&lt;/span&gt;</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="ETFMember_S000002924"
      id="c5bd1d09-fcc1-4d3e-80c0-b13651cb4c57">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund&#x2018;s target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Effective July 24, 2018, the Fund began tracking the MSCI US &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Investable Market Real Estate 25/50 Index as its target index. The inception date for the MSCI US Investable Market Real Estate 25/50 Index was September 1, 2016. Index returns are not provided prior to that date. The Real Estate Spliced Index reflects the performance of the MSCI US REIT Index through February 1, 2018; the MSCI US Investable Market Real Estate 25/50 Transition Index through July 24, 2018; and the MSCI US Investable Market Real Estate 25/50 Index thereafter. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; Updated &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;performance information is available on our website at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; or by calling Vanguard toll-free at &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;.&lt;/span&gt;</rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="ETFMember_S000002924"
      id="fcd288bd-ee8e-424c-837e-ad66ca923e55">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund&#x2018;s ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund&#x2018;s target index and other comparative indexes, which have investment characteristics similar to those of the Fund.&lt;/span&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="ETFMember_S000002924"
      id="x_9d043e25-63c6-4126-988d-37f5dcdcd2cd">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Keep in mind that the Fund's past performance (before and after &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;taxes) does not indicate how the Fund will perform in the future.&lt;/span&gt;</rr:PerformancePastDoesNotIndicateFuture>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="ETFMember_S000002924"
      id="x_8751f017-74e9-4243-a2fd-c8b5f31c4245">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;vanguard.com/performance&lt;/span&gt;</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformanceAvailabilityPhone
      contextRef="ETFMember_S000002924"
      id="x_16050216-c22c-459c-a5c7-5077629d7c9e">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;800-662-7447&lt;/span&gt;</rr:PerformanceAvailabilityPhone>
    <rr:BarChartHeading
      contextRef="ETFMember_S000002924"
      id="x_90db9846-56fa-4287-8cdc-c78df5df0bda">&lt;span style="font-family:Arial;font-size:8pt;font-weight:bold;"&gt;Annual Total Returns &#x2014; Vanguard Real Estate Index Fund ETF Shares&lt;/span&gt;&lt;span style="font-family:Arial;font-size:5pt;font-weight:bold;position:relative;top:-3.25pt;"&gt;1&lt;/span&gt;</rr:BarChartHeading>
    <rr:BarChartClosingTextBlock
      contextRef="ETFMember_S000002924"
      id="x_9d79fa75-574b-440e-a70d-18975e128f98">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:&lt;/span&gt;</rr:BarChartClosingTextBlock>
    <rr:HighestQuarterlyReturnLabel
      contextRef="ETFMember_S000002924_C000032424"
      id="x_1ee1b2d4-5705-4a31-9bac-4af9d0c2566c">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Highest&lt;/span&gt;</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="a8e55557-85ed-4cc7-ba00-f8e8051c575e"
      unitRef="pure">0.1729</rr:BarChartHighestQuarterlyReturn>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="ETFMember_S000002924_C000032424"
      id="x_667bdfe0-90bd-43af-86f4-c5eeb2d91abe">2019-03-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:LowestQuarterlyReturnLabel
      contextRef="ETFMember_S000002924_C000032424"
      id="bd826019-83fa-4363-bae2-055798801abf">&lt;span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;"&gt;Lowest&lt;/span&gt;</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="ETFMember_S000002924_C000032424"
      decimals="4"
      id="x_3bb678f2-f3ef-45bd-8128-e7623f52a02f"
      unitRef="pure">-0.2411</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="ETFMember_S000002924_C000032424"
      id="x_110d1c37-b930-4891-a28d-de74aabd77bf">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:PerformanceTableHeading
      contextRef="ETFMember_S000002924"
      id="cd27a1cf-d7dd-4af5-9b0a-13b92b8a4aa0">&lt;span style="font-family:Arial;font-size:8.5pt;font-weight:bold;"&gt;Average Annual Total Returns for Periods Ended December 31, 2022&lt;/span&gt;</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_C000032424_BasedonNAVMember"
      decimals="4"
      id="d65ac2f9-3559-417c-a443-140c164776fd"
      unitRef="pure">-0.2620</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_C000032424_BasedonNAVMember"
      decimals="4"
      id="b9771279-2de6-4e99-95b9-ae00fc79c179"
      unitRef="pure">0.0366</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_C000032424_BasedonNAVMember"
      decimals="4"
      id="x_465457b2-a7eb-48b1-aaa1-fd5428512713"
      unitRef="pure">0.0641</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_08b5a184-ad5c-46f9-b15e-56e5575a2aad"
      unitRef="pure">-0.2692</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_0d41f3b6-bcd5-4c1e-998e-3696472e4364"
      unitRef="pure">0.0263</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsMember"
      decimals="4"
      id="x_4c17161e-5810-4213-b830-76827a48e818"
      unitRef="pure">0.0523</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="a3cf2b91-49aa-40e2-ab9d-9c2fc5e1bfc0"
      unitRef="pure">-0.1548</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_03f8b3cd-19b2-4937-abb8-cec689527237"
      unitRef="pure">0.0241</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_C000032424_ReturnAfterTaxesonDistributionsandSaleofFundSharesMember"
      decimals="4"
      id="x_67241b7b-3f14-4dc6-ac9b-36bbdd9be0da"
      unitRef="pure">0.0457</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_C000032424_BasedonMarketPriceMember"
      decimals="4"
      id="x_3441885e-fcc0-47be-ac47-e88ad6e856c4"
      unitRef="pure">-0.2621</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_C000032424_BasedonMarketPriceMember"
      decimals="4"
      id="x_0f8ec5ad-30d6-44b3-8d6b-cf0aa66de1ac"
      unitRef="pure">0.0366</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_C000032424_BasedonMarketPriceMember"
      decimals="4"
      id="c96b09df-0268-42ec-bf43-88c3cfa13437"
      unitRef="pure">0.0641</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="f18f8b64-085c-4354-96e4-2e36c14dc495"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="b50c9bcd-0578-41fe-afd0-810da3124222"
      unitRef="pure">0.0378</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_RealEstateSplicedIndexMember"
      decimals="4"
      id="a6b564f3-757f-4c03-9212-0eb25ed6ff3a"
      unitRef="pure">0.0652</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="caa571dd-9148-4a0a-9792-ffa5e6e1baac"
      unitRef="pure">-0.2612</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_MSCIUSInvestableMarketRealEstate2550IndexMember"
      decimals="4"
      id="a14e55a2-73b9-4be7-affd-c3f5cdabdbe6"
      unitRef="pure">0.0406</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear01
      contextRef="ETFMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="df9cc986-4bb0-4df7-856b-e03fcfc81187"
      unitRef="pure">-0.1953</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="ETFMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_01e665f2-a4ae-48eb-ba52-1b1b9b38953e"
      unitRef="pure">0.0865</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="ETFMember_S000002924_DowJonesUSTotalStockMarketFloatAdjustedIndexMember"
      decimals="4"
      id="x_7ccb3bf5-deca-4552-9581-dddc67d0c0a8"
      unitRef="pure">0.1203</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="ETFMember_S000002924"
      id="x_50d3aa25-8456-4b4a-a5d6-74103815e21d">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableClosingTextBlock>
    <rr:PerformanceTableUsesHighestFederalRate
      contextRef="ETFMember_S000002924"
      id="x_549fdc6d-aed6-493d-acf0-e0b4bf7f9b11">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;When after-tax returns are calculated, it is &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. &lt;/span&gt;</rr:PerformanceTableUsesHighestFederalRate>
    <rr:PerformanceTableNotRelevantToTaxDeferred
      contextRef="ETFMember_S000002924"
      id="x_5d2a3864-4931-401f-b52c-41737497595a">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Please note that after-tax returns are not relevant for a shareholder &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. &lt;/span&gt;</rr:PerformanceTableNotRelevantToTaxDeferred>
    <rr:PerformanceTableExplanationAfterTaxHigher
      contextRef="ETFMember_S000002924"
      id="f1a6cccd-d03b-4a89-a13c-50074a36f4a4">&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt;Also, figures captioned &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Return After Taxes on &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;"&gt;Distributions and Sale of Fund Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.5pt;"&gt; may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.&lt;/span&gt;</rr:PerformanceTableExplanationAfterTaxHigher>
    <link:footnoteLink
      xlink:role="http://www.xbrl.org/2003/role/link"
      xlink:type="extended">
        <link:loc
          xlink:href="#x_612f4d7b-a906-4e40-8fdc-da6e729bf7f9"
          xlink:label="x_612f4d7b-a906-4e40-8fdc-da6e729bf7f9"
          xlink:type="locator"/>
        <link:footnote id="x_000003_9f976de2-dc09-44a6-8d62-06b63bcaff15" xlink:label="x_000003_9f976de2-dc09-44a6-8d62-06b63bcaff15" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:span style="color:#000000;font-family:Arial Narrow;font-size:8pt;">None through Vanguard (Broker fees vary)</xhtml:span></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="x_612f4d7b-a906-4e40-8fdc-da6e729bf7f9"
          xlink:to="x_000003_9f976de2-dc09-44a6-8d62-06b63bcaff15"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#bdb49170-69d7-4d9e-814e-c72c55b19312"
          xlink:label="bdb49170-69d7-4d9e-814e-c72c55b19312"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="bdb49170-69d7-4d9e-814e-c72c55b19312"
          xlink:to="x_000003_9f976de2-dc09-44a6-8d62-06b63bcaff15"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#fa2dffc9-8e7b-40c8-998b-e9d20e053cf6"
          xlink:label="fa2dffc9-8e7b-40c8-998b-e9d20e053cf6"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="fa2dffc9-8e7b-40c8-998b-e9d20e053cf6"
          xlink:to="x_000003_9f976de2-dc09-44a6-8d62-06b63bcaff15"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#x_005947b6-895c-4c53-b99d-fe0bf8b93aca"
          xlink:label="x_005947b6-895c-4c53-b99d-fe0bf8b93aca"
          xlink:type="locator"/>
        <link:footnote id="x_000003_5b3aa593-727c-434b-bd8c-cabb32f02849" xlink:label="x_000003_5b3aa593-727c-434b-bd8c-cabb32f02849" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:span style="color:#000000;font-family:Arial Narrow;font-size:8pt;">None through Vanguard (Broker fees vary)</xhtml:span></link:footnote>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="x_005947b6-895c-4c53-b99d-fe0bf8b93aca"
          xlink:to="x_000003_5b3aa593-727c-434b-bd8c-cabb32f02849"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#x_8a678d6a-f963-4c53-b78b-723495a52a98"
          xlink:label="x_8a678d6a-f963-4c53-b78b-723495a52a98"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="x_8a678d6a-f963-4c53-b78b-723495a52a98"
          xlink:to="x_000003_5b3aa593-727c-434b-bd8c-cabb32f02849"
          xlink:type="arc"/>
        <link:loc
          xlink:href="#x_3f467c3b-3c08-4b14-a37a-12df55a0bf7c"
          xlink:label="x_3f467c3b-3c08-4b14-a37a-12df55a0bf7c"
          xlink:type="locator"/>
        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
          xlink:from="x_3f467c3b-3c08-4b14-a37a-12df55a0bf7c"
          xlink:to="x_000003_5b3aa593-727c-434b-bd8c-cabb32f02849"
          xlink:type="arc"/>
    </link:footnoteLink>
</xbrl>
